CIVED

Identification of Factors Causing Construction Contract Breaks and Recommendations for Improvement in West Pasaman Regency

2024-09-12T07:11:51+00:00

The implementation of construction projects in the Regional Government of West Pasaman Regency almost every year there is always a termination of the contract which results in not achieving the government's goal of increasing the standard of living of the community because the targets set by the Government are delayed and hampered. This research was carried out which aims to identify the causes of contract termination in the implementation of construction service procurement in West Pasaman Regency, analyze and evaluate the causes of contract termination in construction implementation, and determine recommendations for improvement to prevent contract termination in the implementation of construction service procurement in Pasaman Regency West. This study uses descriptive qualitative analysis based on the results of interviews with CMO and TIO for work that has terminated its contract and analyzes administrative data on termination of contracts for construction work which has experienced termination of contract. The methods used in the discussion to find out the factors that cause construction contract termination are the Fault Tree Analysis (FTA) Method and the Obtain Cut Set (MOCUS) Method. From this study it can be concluded that the main factor causing the breakup of construction contracts is the owner's firmness with the performance of the provider, the provider being evaluated is unable to carry out the work, the contract termination should be carried out earlier, not waiting for the end of the year and not providing an extension of the implementation period past the fiscal year and the owner is negligent. in controlling the contract. While the supporting factors that cause the termination of the contract are the provider's fault, namely poor project management, the practice of borrowing company flags, not having capital, not heeding the instructions of the owner and field supervisor as well as other factors, namely disturbance factors from the community around the work location, weather, selection of providers and material supply. For recommendations for future improvements, it is recommended that the owner carry out control of the construction contract more optimally and the provider is more professional at work. This study analyzes the factors that cause construction contract terminations only from the owner's point of view, therefore further research is still needed from the point of view of job providers and supervisors to see the characteristics and possibilities of other different factors.

Road Damage Analysis using Surface Distress Index (SDI) and Its Handling on Provincial Road Babat - Jombang (STA 7+000 - 12+500)

2024-09-18T06:25:18+00:00

The Babat - Jombang road is often traveled by highly loaded vehicles because there are large industries along this section. In addition, the road is damaged by weather and poor subgrade conditions. Thus, resulting in road damage that can interfere with user comfort. Therefore, road damage analysis research was conducted on Babat - Jombang Road (STA 7+000 - 12+500). Road damage analysis in this study using the SDI method. The SDI (Surface Distress Index) method is a road performance scale obtained from visual observations of road damage that occurs in the field. The SDI method is a method that produces an SDI value obtained from the percentage of crack area, crack width, number of holes per 100 m, and the depth of the ruts. From this research, the types of damage on Babat - Jombang Road (STA 7+000 - 12+500) are the hole damage area of 0.11%, longitudinal cracks of 12.05%, transverse cracks of 0.17%, edge cracks of 0.29%, crocodile skin cracks of 79, 66%, shoulder joint cracking by 0.0015%, ruts by 1.48%, bleeding by 1.1%, ravelling by 2.61%, surface layer flaking by 0.13%, patches by 0.26%, upheavel by 0.51%, shoving by 1.6%. Road condition assessment using SDI method shows 87.27% in good condition and 12.73% in moderate condition. Handling carried out is leveling, sealing, hot aggregate sprinkle, and patching holes.

Comparison Model of Vegetation Index and Mangrove Density using Landsat 8 Satellite Imagery in Ujungpangkah

2024-10-13T18:35:06+00:00

Gresik Regency is a coastal area with a significant mangrove population, notably in the Ujungpangkah region. The Ujungpangkah mangrove forest is a designated ecotourism and conservation area. However, due to management and utilization practices by the local community, the mangrove ecosystem in Banyuurip Village, Ujungpangkah District, has experienced a decline. This study aims to determine the mangrove density in Banyuurip Village using vegetation index transformation methods (NDVI and DVI). Assessing the density of mangrove vegetation is crucial for the effective management of mangrove forests to ensure they fulfill their ecological functions. The research employs a quantitative method, utilizing Landsat 8 imagery data to measure mangrove density using the NDVI and DVI methods. The study results indicate that the NDVI canopy density classification is 86.67%, divided into three classes: dense (569.700 ha or 95.32%), medium (29.910 ha or 4.50%), and sparse (1.080 ha or 0.18%). Meanwhile, the FCD classification results are 73.33%, also divided into three classes: dense (583.740 ha or 97.67%), medium (13.410 ha or 2.24%), and sparse (0.540 ha or 0.09%). The NDVI method proved to be the most accurate for classifying canopy density based on the accuracy test data

Efficiency Analysis of Open Polygon Method in Land Mapping in Mojoroto Kediri

2024-10-13T18:42:56+00:00

In the building establishment process, the geotechnical characteristics of soil have a significant impact on the structural performance of buildings. Therefore, soil mapping becomes a critical step in understanding the properties of soil that can affect foundation and structural stability. The mapping method used is open polygon mapping, which allows flexibility in determining land boundaries. Measurements were taken at three survey points: roadside, middle of the field, and edge of the field. The mapping results reveal variations in soil characteristics that need to be considered in development planning to ensure solid and stable building foundations. The implementation of Geographic Information Systems (GIS) in this process facilitates deeper data analysis and better visualization of field conditions. The mapping results show significant variations in ground elevation at each survey point, emphasizing the importance of understanding the area's topography. Additionally, area measurements were conducted using open polygon data, providing fundamental information for area development planning. Contour maps generated through Surfer software provide clear visualization of ground elevations at each survey point, enhancing understanding of the area's topography. This research contributes significantly to understanding soil characteristics and topography in the rear area of Mojoroto. It is expected to serve as a guide for area development planning, ensuring the stability and safety of future building structures. Thus, soil mapping is a critical step in ensuring the safety and sustainability of future buildings and contributes to sustainable area development planning.

Risk Analysis of Post-Disaster Logistics Distribution Failure

2024-10-13T18:51:05+00:00

In conducting logistical activities of disaster relief in natural disaster management. it is often not possible to implement as it should. and there are always potential risks that arise. One of the problems faced is the delayed distribution of post-disaster logistics. Therefore. risk management is necessary so that disaster relief logistics activities can run well. In addition. there is a need for a risk mitigation strategy to mitigate potential risks in the post-disaster logistics distribution process. The study aims to identify potential risks to post-disaster logistics distribution activities and find out which risk management strategies are a priority to address immediately. Failure Mode and Effect Analysis (FMEA) is a systematic approach to identifying failures and giving a value or score to each risk. From the results of the study. 32 potential risks occurred. As a result. 13 risks were identified with RPN values above critical point values. Thus. 13 were obtained as priority management risks. where the risks with the top 3 RNA values are Disruption of the post-earthquake telephone network Difficulty coordination of the logistics team with a rating of 25.98. Long logistic delivery travel time with a value of 21.86. and Condition of the vehicle used is not good with a score of 21.66. Thus. for 13 of these risks. mitigation is carried out for treatment priorities. Risk management strategies are applied to risks that have RPN values above critical values to minimize the impact.

Analysis the Influence of 4C Skills in Improving Employability Skills and Learning Achievement of Vocational School

2024-10-13T19:01:11+00:00

Economic and technological advances in Indonesia require vocational school graduates to be able to work competently according to their fields. The Ministry of Education and Culture supports the 21st century learning model which refers to the 4C skills, namely Communication, Collaboration, Critical Thinking and Creative. Achievement in the learning process is used to measure the achievement of goals and the intelligence of students. To be able to enter and survive in the world of work, it is also necessary to prepare attitudes, character and skills in work or employability skills that start from the learning process. This study aims to analyze the influence of 4C skills in improving employability skills and learning outcomes. The approach used in this study is quantitative with the student population of the DPIB Expertise Program of SMK Negeri 3 Semarang. The sampling technique uses a total sampling of 72 respondents. This study uses multiple linear regression analysis techniques that have previously gone through analytical tests including (1) Normality Test, (2) Homogeneity Test, (3) Linearity Test. The results of the study showed that (1) there was an influence between learning achievement on 4C skills with a T value of 4.660, (2) there was an influence between employability skills on 4C skills with a T value of 9.520, and (3) there was a simultaneous effect between learning achievement and employability skills against 4C skills with an F value of 55.937. The simultaneous correlation of the three variables was 78.6% with a simultaneous influence value of 61.9%, the remaining value of 38.1% was influenced by other factors that were not studied by the researcher.

Lateral Spreading in Christchurch, New Zealand: An Empirical Approach

2024-10-13T19:11:56+00:00

Lateral spreading, a complex phenomenon resulting from liquefaction, manifests when saturated, cohesionless soils lose their strength during seismic events, causing them to deform and flow horizontally. This process poses a substantial risk to buildings and infrastructure, often resulting in extensive damage, significant financial burdens, and, tragically, loss of life. In Indonesian, liquefaction is recognized for its ability to transform solid ground into a fluid-like state, amplifying its danger in regions prone to earthquakes. This study aims to analyze lateral spreading through empirical methods, specifically employing the Bartlett & Youd Method (2002) and the Byrne Method (1990). The analysis focuses on sites previously affected by lateral spreading, notably those impacted by the 22 February 2011 Christchurch earthquake, which registered a magnitude of 6.2 and a peak ground acceleration of 0.52. The selected locations include the South Brighton Bridge, Anzac Bridge, and Fitzgerald Bridge in Christchurch, New Zealand. The findings demonstrate that both the Bartlett & Youd Method (2002) and the Byrne Method (1990) yield results that closely approximate the actual conditions at site.

Utilization of Open Polygon Method for Land Mapping in Mojoroto Kediri with Geospatial Approach

2024-10-13T19:11:52+00:00

Land mapping is an important research activity to determine the location of points on the earth's surface, describing the physical condition of parts of the surface that resemble the actual condition. The objective of this process is to gain a comprehensive understanding of the land to be built and used through land area measurements, topographic maps, and land volume analysis at various altitudes. In this mapping, the open polygon method is used for calculations which are conventional methods using data point values as data centers to represent the area of influence. During this mapping, there are three main points used with the open polygon method. A total of 26 ground contours were recorded, and 4 road contours recorded. During the mapping process, corrections are required on the open polygon calculations to ensure the accuracy of the results. This correction involves adjusting the data to take into account field variability and inaccuracies of measuring instruments, so that the resulting data can be reliable for further analysis and correct decision-making. The land that has been painted can be used for various fields such as construction, and mining. Land mapping allows partial surface physical state imaging, classification of land, and can be used to plan, build, and maintain infrastructure such as highways and bridges. The result of this practice obtained data of the maximum height of 90,0945 masl and minimum 88,76 masl with the average ground height 90,05059 masl, while the average highway height is at 88,86175 masl.

Analysis of Effect Overloading on the Remaining Life Pavement Plan on the Bungah Highway - Ngawen Highway Section

2024-10-17T02:18:43+00:00

Bungah -Ngawen highway section is one of the accesses to the industrial area in Gresik City. This affects the vehicles that cross this road, which are dominated by heavy vehicles that distribute goods and services. These conditions can cause faster damage to the pavement which can hinder smooth transportation. This research aims to analyze the impact of vehicle loads on the remaining life of the plan on the Jalan Raya Bungah-Jalan Raya Ngawen section (STA 0+000-STA 5+500). The reason for this research is the amount of damage to the pavement. Based on a direct survey, this road has a road width of 6 m with a length of road damage of 2,15 km from the road section under review. The data used are primary data in the form of average daily traffic and secondary data, namely LHR data and vehicle load data. The calculation method used is the AASHTO 1993 Method. From the primary and secondary data obtained, traffic growth, percentage of overload, ESAL value, W₁₈ value, and the remaining value of the road plan life can be calculated. From the calculation results, the standard ∑W₁₈ value during the plan life is 338422516.86 to 4796885453.64, while for the overload ∑W₁₈ value is 531674277.94 to 6849455940.63. The main trigger for pavement damage on the Jalan Raya Bungah-Jalan Raya Ngawen section is class VIb vehicles because they have the largest overload of 27,90%. The remaining life value of standard load conditions in 2024 of 57,46% decreased under overloading conditions to 33,29%, with a difference of -24,17% and the road service life will end in March 2026 or a reduction from the planned life of 10 years.

The Compressive Strength of Unfired Clay Brick with MICP Reinforcement

2024-10-17T03:09:35+00:00

Industrial waste in the form of sewage sludge, which is often overlooked, can have significant environmental impacts, especially polluting groundwater and surface water sources. This pollution leads to degradation of water quality, reduces the availability of clean water, and affects ecosystems. To reduce these impacts, sewage sludge can be utilized in the manufacture of construction materials, such as bricks, which is considered an economical and environmentally friendly solution. Fireless brick making, in accordance with the concept of green building, avoids air pollution from the firing process. This study explores the use of Bacillus huizhouensis bacteria in the Microbially Induced Calcite Precipitation (MICP) method to improve the strength of fireless bricks. Bacillus huizhouensis, which can hydrolyze urea and produce calcium carbonate (CaCO₃) or calcite, was chosen for its ability to produce CaCO₃ under alkaline conditions. Bacillus Huizhouensis bacteria were used to strengthen bricks with 15%, 20%, and 25% bacteria concentration variations with culture ages of 8 hours, 10 hours, and 15 hours. The results showed that the addition of 15% sewage sludge and 25% Bacillus huizhouensis bacterial solution with a culture age of 10 hours produced the highest compressive strength of 34.20 Kg/cm² (3.35 MPa), compared to sewage sludge bricks without bacteria (13.87 Kg/cm² or 1.36 MPa). Although showing significant improvement, this value is still below the SNI 15-2094-2000 standard of 50 Kg/cm² (5 MPa).

Evaluation of Implementation Procurement Policies Via E-Catalog for Construction Work (Case Study: National Road Implementation Agency For West Sumatera Region)

2024-10-17T03:21:53+00:00

National Road Implementation Agency (BPJN) for West Sumatera Region has an important role in managing road infrastructure in the West Sumatra Province. In the context of procurement for construction implemented by BPJN for West Sumatra, the use of e-catalogs is a solution to simplify the procurement process. The aim of this research is to evaluate how it is implemented, analyze supporting factors, analyze weaknesses and evaluate the benefits of the policy of procurement via e-catalog in construction work. This research uses a qualitative approach with a semi-structured interview method and Data analysis used thematic analysis. The results of the research show that the implementation of the policy for procurement via e-catalog for construction work at the National Road Implementation Agency for West Sumatera Region has been successfully carried out without any significant problems. Implementation of the policy for procurement via e-catalog in construction work is influenced by various supporting factors, including ease of application, socialization and technical guidance, adequate infrastructure, staff competence and coordination, as well as clear regulations and guidelines. Weaknesses of e-catalogs such as no information on remaining package capabilities, main equipment having to be proprietary, provider selection opportunities, limited service locations, and complete product limitations, all have a significant impact on the effectiveness and efficiency of the procurement process. The E-catalog system provides various significant benefits for construction work. Procurement time efficiency, fair prices, transparent systems, price negotiation, work outcomes, bid documents, provider selection, as well as motivation and competitiveness are some of the key benefits identified.

Calculation Thickness of the Added Flexural Layer on Composite Layer using a Light Weight Deflectometer (LWD) Pusjatan

2024-10-17T12:07:46+00:00

Calculating the thickness of the flexible overlay needs to consider several factors, such as traffic load, soil characteristics, existing pavement conditions, and planned changes to the road design. This procedure generally uses recognized pavement design methods, such as the AASHTO 1993 method (Guide for Design of Pavement Structures). This research aims to determine the thickness of the added layer using an asphalt layer on composite roads in accordance with the 1993 AASHTO standards. It is hoped that this method can produce an effective overlay design, extend the life of the pavement, and increase the comfort and safety of road users. The data used in this research includes primary and secondary data. The results of this analysis are to calculate the STA 0 segment, for other STAs use the same method. From the Light Weight Deflectometer (LWD) deflection data, the Subgrade Reaction Modulus (k) value was 473 psi/in, the Concrete Elasticity Modulus (Ec) value was 4,843,105 psi and the Rupture Modulus (Sc') value was 699 psi. The traffic load used is 25.000.000, so the result of calculating the plate thickness to serve future traffic (Df) is 10.79 inches or 27.40 cm and the effective plate thickness value (Deff) is 9.13 inches or 23.30 cm, then the result is the added layer thickness (Dol) is 3.30 inches or 8.39 cm

Assessment of the Crack Level in Silo Foundations Due to Settlement

2024-10-17T12:19:29+00:00

A silo is a structure used to store bulk materials (bulk materials). Silos are generally used in agriculture as storage for grains and animal feed. The foundation silo must be designed to withstand the forces generated and accommodate the movements transmitted to the structure and foundation by the seismic ground motion design. The dynamic properties of the soil, the anticipated ground motion, the design basis for the strength and energy dissipation capacity of the structure, and the dynamic characteristics of the soil should be included in determining the foundation design criteria. In PT X, SILO structure serves as a place for livestock feed production, with the hope that it can last for a relatively long time. The condition of the existing SILO structure is currently some cracks in several parts of the piles and the bottom slab. The results of the visual inspection in the field regarding the condition and level of cracking in the silo foundation were compiled into a matrix inspection table using four categories: category 1 indicates no repairs needed, category 2 marked in green, represents an acceptable cracking condition with minor repairs, category 3 marked in yellow indicates moderate cracking that requires attention, and category 4 marked in red signifies major cracking or unacceptable conditions that require structural repairs. The results of the field inspection indicate that approximately 57% of the concrete slab foundation of the silo requires needs attention or repair. The condition of the plate/slab structure has some cracks measuring 0.3mm - 0.5mm, but injection and patching have been carried out. As for the condition of the silo foundation, about 30% requires needs attention and repair as well.

Analysis of the Causes of Deviations in the Implementation of Construction Work Contracts Based on Verdict

2024-10-22T06:36:16+00:00

Construction Work is the whole or part of the activities that include the construction, operation, maintenance, demolition, and rebuilding that are regulated in a Construction Contract. In the implementation of the Construction Contract, several problems cause deviations. The purpose of this research is to analyze the causes of deviations in a Construction Contract based on Verdict. The research data was obtained from the Supreme Court Repository page by searching for Verdict related to implementing Construction Contracts. The limitation of this research is a case that has been decided in the last 10 years in the District Court in West Sumatra. The search results obtained 9 verdicts. The method used to analyze the data is the Rich Picture Diagram (RPD). Validation and refinement are carried out using the Interview method from the results of secondary data analysis. The outcome of this research is the causes of deviations that are prejudicial to one of the parties and thus fall under civil law such as The occurrence of delays caused by: Contractor negligence during implementation, Contractor achievements not paid by the Owner, negligence of the Planner Consultant, the state of the land is not by the drawing plan, continuous heavy rain that disrupts the work, Kurs strengthen sharply, land acquisition has not been completed by the Owner, the Contractor is not given the opportunity 50 days of completion; Disputes caused by: Owner made unilateral changes to Technical Specifications, Supervisory Consultant's mistake in reporting progress.

Analysis of Service Performance at Kotabumi Lampung Train Station using the Kano Method

2024-10-22T06:55:19+00:00

The Railway Station is an essential thing in the operation of the train. Passenger trains will raise and lower passengers, both the initial destination of passengers and transit. Kotabumi Railway Station is a station whose activities are to raise and lower passengers; in this case, the train station must have excellent and effective service performance for passengers. So, it is necessary to research the level of passenger satisfaction with the benchmarks for the service performance of train stations regulated in the Minister of Transportation Regulation No. 63 of 2019 concerning Minimum Service Standards. These benchmarks are then submitted as questions to the passengers, which are then processed using the kano method to determine the level of passenger needs and satisfaction. The kano method on the level of passenger satisfaction at the Kotabumi Railway Station results in that 19 attributes are one-dimensional where service performance if fulfilled, will experience the pleasure that is balanced with the existing version, and six characteristics of satisfaction levels are in the indifferent category, namely service performance must remain maintained. Furthermore, the highest CS and DS values were obtained for information on train arrivals and station operating schedules. If this service performance is fulfilled, the passenger satisfaction level is 0.77. If the service performance is not fulfilled, passenger disappointment is at -0.82, so this attribute must be a top priority.

The Effect of Compressive Strength Paving Blocks Utilizing Polypropylene Plastic Waste

2024-10-27T15:36:15+00:00

Waste is a big problem for every country in the world, including cities. Currently, the city of Balikpapan is experiencing rapid economic and population growth, of course the growth also brings challenge in waste management, especially plastic waste. The type of plastic waste than we often encounter especially in coffe shops is Polypropylene (PP). In this research, pp type plastic waste is recycled as a substitute for cement in paving blocks with a composition of 30%, 40%, 50% to sand. The test conducted on this research is compressive strength. The purpose of this research is to determine the effect of PP plastic melt mixture on paving block mortar on increasing compressive strength. From the research results obtained the maximum compressive strength value for the composition of 50% Polypropylene : 50% sand with a compressive strength value of 11,83 Mpa. Similiarly, with the composotion of 40% Polypropylene : 40% sand, this value of is included in the quality D which can be used for parks according to SNI 03-0691-1996. While the 30% composition is not included in the quality.

Consistency Testing of Light Weight Deflectometer (LWD) Tool Pusjatan on Composite Road (Case Study of Road Section Soreang New Ring Road, Bandung Regency)

2024-10-27T15:59:16+00:00

In an era of rapid technological and infrastructural development, the quality of roads is critical to ensuring efficient and safe mobility. Composite roads, which consist of a mixture of different types of construction materials, have become an attractive option in road development in various regions. However, to ensure the success of composite roads, structural consistency and performance must be considered. A Light Weight Deflectometer (LWD) is a device used to measure the instability of road layers by applying surface pressure and measuring the resulting deflection. Although the use of LWD is common in the road construction industry, specific research on LWD consistency testing of composite roads is limited. This study investigates and analyzes the consistency of LWD on composite roads to improve the understanding of its performance. The results of the study on composite pavements conducted at three points with 30 trials showed a coefficient of variance of less than 5%. This result indicates very strong data consistency. Based on these consistency values, the LWD is acceptable, but it needs to be correlated with other tools to determine its validity. If the consistency and correlation meet the requirements or are less than 5%, LWD has a good chance of being used in composite pavements.

Correlation of Air, Surface and Pavement Temperatures using MPU 6050 Accelerometer Sensor

2024-10-27T19:27:56+00:00

This research analyses the correlation between air temperature, road surface temperature and pavement temperature using the MPU 6050 accelerometer sensor and the Pearson correlation method. Temperature measurements were taken at several predetermined locations, with the data analysed to identify the correlation between the three types of temperature. The analysis showed a very strong correlation between air temperature and road surface temperature, with a correlation coefficient of 0.7845 at night and 0.9663 during the day. Similarly, there is a very strong correlation between road surface temperature and pavement temperature, with a correlation coefficient of 0.8482 at night and 0.9673 during the day. These findings indicate that an increase in road surface temperature leads to an increase in pavement temperature. It was concluded that the correlation method can be used to predict temperatures at other points without invasive direct measurements, thus preventing damage to the road due to destructive measurements. This method is recommended as an alternative in pavement temperature monitoring.

Evaluation of the Level of Vulnerability of Flood Disaster Prone Areas in the Batang Gasan River Basin using the Weighted Product (WP) Method

2024-10-27T19:42:05+00:00

Indonesia is an area that is prone to hydro-meteorological natural disasters such as floods, landslidesand so on. In Indonesia, especially West Sumatra, the cause of flooding is dominated by high rainfall, as is the case in the Gasan Gadang watershed. In an effort to overcome problems resultingfromflooding, there are several ways, one of which is knowing the causes of flooding and the target areafor flooding, which depends on the characteristics, hydrology and physical conditions of the area. Themain objective of this study is to determine the level of vulnerability to flood disasters and tomapflood-prone areas in the Batang Gasan watershed area to obtain the level of vulnerability andverifyflood-prone areas with measurement results. This research uses several stages of analysis, namelyweighted product (WP) analysis and dynamic analysis. The research results show that areas that havea high level of flood vulnerability are IV Koto Aur Malintang sub-district and Batang Gasansub- district. The area that is vulnerable to moderate-scale flooding is Tanjung Mutiara District. Andthearea that has a low scale flood vulnerability is Sei Geringging District. For areas that are pronetohigh-scale flooding, using the Dynamic Analysis method, the area area can be reduced over the next two year period. And in the 10th (tenth) year the flood area can be reduced by 85.88%. Efforts madeto reduce the area of the flood area are by installing check dams and dredging sediment along the river for District IV Koto Aur Malintang and Batang Gasan District.

The Relationship Between Pamong Teacher Guidances and The Succes of Student Educational Field Practice (PLK)

2024-10-29T16:57:00+00:00

The research problem background is the low of two-way communication between PLK students and tutor teachers, so that students have difficulty in dealing with the obstacles encountered during PLK at school. Based on this research, researchers are interested in doing research that purpose to reveal the relationship between Teacher Guidance and Student PLK Success. This research type was quantitative research through method in correlational. This research was done at the Civil Engineering Department, Engineering Faculty, Universitas Negeri Padang. The research respondents were Building Engineering Education Study Program students, Engineering Faculty, Universitas Negeri Padang who had followed in the PLK period July-December 2022. The technique for sampling used Total Sampling with a sample size of 45 respondents. The method for data collection uses a questionnaire and documentation of PLK grades filled in by the mentor teacher. The technique for analysis used is Product Moment correlation. The research results indicated that there is a positive and significant relationship between Teacher Guidance and Student PLK Success. The evidence was the correlation coefficient greater than r table which is 0.705 > 0.294 and a value of significance is 0.00 < 0.05.

The Influence of Biocementation on the Compressive Strength of Fireless Bricks

2024-10-29T17:02:06+00:00

Waste sludge from the Water Treatment Plant (IPA) is used as an additive in the manufacture of environmentally friendly bricks to reduce river pollution. In the process of making these bricks, clay is mixed with sewage sludge at 15% of the total weight of clay. In addition, to reduce the impact of air pollution, the bricks were not burned. This research emphasizes the importance of using environmentally friendly alternative materials in brick production. Bacillus Huizhouensis bacteria was applied to strengthen bricks with variations of bacteria concentration of 8%, as well as bacterial culture age variations of 8 hours, 10 hours, and 15 hours. After the bricks were matured for 14 days, the test results showed that bricks using 8% bacterial solution with 10 hours of culture increased by 70.65% to 1.57 MPa, compared to normal bricks of 0.92 MPa. So that bricks with 8% bacteria with a culture age of 10 hours with a period of 14 days have a higher value than normal bricks.

Implications of The Increase In The Government's Project Budget Ceiling For Construction Managerial In Small Qualified Contractors

2024-10-29T17:06:48+00:00

The government has issued LKPP regulation No. 11 of 2021 which states that small qualification contractors may handle projects up to 15 billion, which before this regulation came out small contractors could only handle projects with a maximum value of 2,5 billion. The government hopes positively for this restriction, because the gap between large and small construction companies is quite high. In order to compete for large project values, small contractors must be able to reorganize the four managerial stages of construction project implementation, namely Planning, Organizing, Actuating, and Controlling (POAC). For this reason, a study was conducted that aims to analyze the implications of increasing the budget ceiling of government projects on the construction managerial of small qualification contractors. This research uses a descriptive qualitative method by analyzing changes in construction project managerial at each stage of construction project managerial through an in-depth interview process directly with small contractors who handle construction projects worth 5 to 15 billion in fiscal years 2022 and 2023 in the Padang City government. The result of this research is that there are changes in the managerial constructors at the planning stage. At the planning stage the contractor organizes the implementation of the project so that the project can be completed within the agreed time, through the use of Man, Money, Material, Market, Machine, and Method (6M) resources. The resources that change during project implementation at the planning stage are human resources (man). With an increase in the project budget ceiling, small qualification contractors increase the number of team personnel, labor, and team competence in mastering certain competencies to support the implementation of construction projects. While the management of 5M (man, money, material, machine, and method) at the organizing, actuating, and controlling stages, small qualification contractors are able to adjust their construction managerial implementation when the project is still worth under 2,5 billion with a project whose value increases to 15 billion.

Comparison of Gumbel Method and Log Pearson Method in Flood Control in Konto River Jombang

2024-10-29T17:14:30+00:00

This study aims to analyze the potential for flooding in the Konto River, Gudo District, Jombang Regency, this study uses the Gumbel and Log Pearson III statistical methods. Floods in this area often occur due to rainwater flow from the surrounding mountains which causes damage to infrastructure and settlements. Maximum daily rainfall data from 2013 to 2023 are used in this analysis. The Gumbel method is a statistical technique that is often used to analyze extreme rainfall data. The Gumbel and Log Pearson III methods are applied to estimate the design rainfall based on the flood return period, which is useful in infrastructure planning and flood mitigation. The calculation results show that the design rainfall increases with the increase in the return period. Compared to the Log Pearson III method, the Gumbel method provides higher design rainfall results, making it more suitable for estimating extreme rainfall in this area. These results are important in efforts to manage water resources and control flooding in the Konto River. The design rainfall will increase with the longer return period. This means that the higher the design rainfall, the smaller the possibility of it happening again. The results of the calculations show that the three methods can be used to calculate the planned rainfall, because the differences between one method and another are not much different, but the most suitable method to use is the gumbell method because the planned rainfall value is greater.

Effectiveness of Rice Husk Ash and Glass Powder Waste as Partial Replacements of Cement in Concrete Construction

2024-10-31T16:29:01+00:00

The environmental impact of cement production has drawn attention to the use of glass waste and rice husk as a partial replacement for cement in concrete. According to research, the compressive strength of concrete containing GPW and RHA can increase up to 15-20%, after which it begins to decline. The objective of this study was to analyze the effectiveness of partial replacement of cement with GPW and RHA. Some of the factors considered in this study were compressive strength and specific gravity. The proportions of GPW and RHA used were 0%, 3%, 5%, 10%, 15%. Then concrete testing was done after 7 and 28 day. The maximum 28-day concrete compressive strength result for the addition of GPW and RHA at 5% mix proportion was 33.1 Mpa. The more the proportion of GPW and RHA mixture, the more the relative specific gravity of concrete decreases. Overall, this study found that the use of GPW and RHA in concrete had a significant effect on compressive strength and specific gravity. But do not forget to pay attention to how much GPW and RHA mix needs and the quality of concrete to be achieved.

Community Behavior towards Plastic Waste: Case Study in Nagari Batu Basa as a Traditional Village

2024-10-31T16:36:17+00:00

Sumatra Barat is a halal tourist area but many people throw rubbish carelessly. This phenomenon is a big problem, because environmental issues and waste are world issues. This study reveals the causes of people's behavior of littering using quantitative and qualitative methods. Using 30 observers who monitored community activities for 10 days. The population of this research is the people of Nagari Batu Basa, Pariangan Tanah Datar, Sumatra Barat, consisting of three Jorong (hamlet), Jorong Batu Basa, Jorong Koto Baru, and Jorong Sialahan. The results of the study reveal that people's behavior is to throw rubbish into the river because there are no regulations from the government, there are no rubbish bins, and there is no community initiative to make rubbish bins. People throwing rubbish carelessly has become a habit. People do not care about plastic waste because they do not have knowledge and understanding about plastic waste. Education about waste is also not provided to school students. Apart from that, the government does not pay special attention to plastic waste. The results of this study prove that regulations have an important role in shaping people's behavior in managing waste, especially plastic waste.

Permeability and Dynamic Stability in Porous Asphalt Mixtures Using Cariphalte Asphalt and Gilsonite Additives

2024-10-31T16:50:57+00:00

Porous asphalt mixture is a new generation of flexible pavement that allows water to seep into the top layer (wearing course) both vertically and horizontally. This condition is possible, because the gradation used has a coarse aggregate fraction of not less than 85% of the mixture volume. This layer uses an open gradation (open graded) which is spread over a layer of waterproof asphalt to prevent seepage into the road foundation. This porous asphalt layer can effectively provide a greater level of safety, especially during rainy times to prevent aqua-planing, resulting in rougher surface roughness and can reduce noise (noise reduction). In this research, a test will be carried out on porous asphalt with a mixture using Cariphalte modified asphalt and gilsonite as the added ingredient. Variations in asphalt content used are 4%, 5%, 6%, 7%, 8%. Determination of variations in levels of variation is based on research that has been conducted. This research involves analysis of calculation results based on experimental data from laboratory scale experiments including Marshall Testing, Immersion Index, Permeability, Slip Resistance, Dynamic Stability, and Resilient Modulus. The test results show that the smallest permeability value is in the 8% gilsonite mixture but it does not meet the requirements of AAPA 2004 so the mixture with the greatest stability value is used. From the results of dynamic stability testing, it shows that the mixture of test objects with a content of 7% gilsonite has a dynamic stability value of 5250 passes/mm at a temperature of 45°C and 3150 passes/mm at a temperature of 60°C.

Structural Design of a 10-Story Office Building using the Special Moment Frame System (SMFS) in Padang, West Sumatra

2024-10-31T16:59:16+00:00

Indonesia is located at the convergence of the Eurasian, Pacific, and Indo-Australian tectonic plates, making it prone to significant earthquakes, such as the Aceh earthquake and tsunami in 2004 with a magnitude of 9.1, and the Padang earthquake in 2009 with a magnitude of 7.6, both known for their severe impacts. According to the Central Statistics Agency (BPS), there were 10,843 earthquakes in 2022. Given this high level of risk, all buildings, especially offices, must be designed to be earthquake-resistant due to high activity and user numbers. The city of Padang is categorized in Seismic Design Category D, indicating a high level of earthquake risk. The construction of a ten-story reinforced concrete building for office use is planned, referring to SNI 1726-2019 on earthquake resistance and SNI 1727-2020 on minimum loads, along with the Special Moment Resisting Frame System (SMRF). Structural analysis and modeling are conducted using ETABS software, with element dimensions based on the initial design. This analysis aims to ensure the building meets earthquake resistance requirements through response spectrum evaluation, including natural periods, inter-story drift, P-Delta effects, and checks for irregularities. Based on internal forces from ETABS V.18, reinforcement designs are prepared for structural elements such as columns, beams, slabs, and shear walls. A design capacity evaluation ensures the safety and optimal performance of the structure during an earthquake.

Identification of Accident-Prone Points (Black Spots) on the Ujung Gading-Simpang Empat Road Section

2024-10-31T17:05:36+00:00

The Ujung Gading-Simpang Empat road section has the highest number of accidents in West Pasaman Regency. Accidents that occur at a location range from minor injuries to death. This research aims to determine the main factors influencing accidents, accident characteristics, and black spots and find solutions to minimize accidents. Research method, the method used is a quantitative descriptive method. Driver factors are the biggest factor causing accidents with 330 cases in 2018-2022. Apart from driver factors, vehicle factors also influence traffic accidents with 75 cases in the 2018-2022 period. Analysis of the Highest Accident Rate using the Accident Equivalent Number (AEK) method, and to calculate the number of accidents and the Upper Control Limit (UCL) method to determine accident-prone locations. The data used is the 2018-2022 West Pasaman Traffic Police traffic accident report data which is grouped based on characteristics. Based on the calculation results, the Ujung Gading-Sungai Aur road section has an AEK value of 1081 and UCL 1,036, Sungai Aur-Simpang Tiga Alin with an AEK value of 697 and UCL 884m26, and Simpang Tiga Alin-Simpang Empat with an AEK value of 690 and UCL 840.77. So these three roads are declared as accident-prone areas (black spots). To minimize the number of accidents, efforts are made by law enforcement (Enforcement), education (Education), and engineering (Engineering).

Study of Final Business Case Sensitivity Analysis in the Government and Business Entity Cooperation (KPBU) Project in the Drinking Water Sector

2024-10-31T18:52:28+00:00

The purpose of this study is to analize sensitivity of the final business case in public private partnership (PPP) projects. The outcome of this study will provide an overview and limits on changes in the parameters forming the investment. Therefore, a sensitivity analysis was carried out to changes in price, initial cost and interest. The results of the study shows the three changes show that the most sensitive parameter is price changes. Meanwhile, due to the decrease in absorption volume at the offtaker in Jakarta, two efforts were made, namely by increasing the minimum tariff to Rp. 3,846, - or by increasing the concession period to 45 years, this project can be said to be investment worthy.

Traffic Impact Analysis Due to Construction of Special Eye Hospital Padang Eye Center

2024-11-03T17:58:45+00:00

Padang Eye Center is one of the hospitals under construction on Jalan Khatib Sulaiman, Lolong Belanti, North Padang District, Padang City, West Sumatra. The construction of the hospital will certainly have an impact on traffic on Jalan Khatib Sulaiman. The purpose of conducting andalalin is to analyze the amount of travel demand that occurs at the Padang Eye Center Hospital in pre-construction, construction period, operational period, and post 5 years of construction, as well as seeing the impacts that occur and how alternative solutions are carried out. The parameters used are based on the Regulation of the Minister of Transportation of the Republic of Indonesia Number 17 of 2021 concerning the implementation of andalalin, the Indonesian Road Capacity Guidelines (PKJI) of 2023 concerning the performance of road sections and the Directorate General of Land Transportation of 1996 concerning parking. The results of the analysis, namely the existing conditions obtained a V / C ratio of 0.43 level B, the construction period obtained a V / C ratio of 0.45 level C, the operational period with a V / C ratio of 0.45 level C, and after 5 years of operation the V / C ratio is 0.58 level C which means that the flow is stable, but the operating speed begins to be limited based on the level of service (LOS) table. Parking needs based on the building area of 2832 m2 were obtained as many as 113 srp, while based on the available parking area it can accommodate as many as 121 srp, so the parking space requirements of the Padang Eye Center Special Eye Hospital have been met. The alternative solution to this analysis is the placement of regulatory officers in front of the entrance and exit of the Khatib Sulaiman Road intersection during the construction period, regulating parking circulation within the hospital area, and making barrier gates to regulate vehicle traffic flow.

Evaluation of Concrete Compressive Strength with Coral Stone as a Fine Aggregate Replacement

2024-11-03T18:05:12+00:00

This study examines the effect of using coral stone as a substitute for fine aggregate on the compressive strength of concrete. Tests were conducted with varying coral stone replacement percentages ranging from 0% to 100%. The results showed that coral stone can enhance the compressive strength of concrete, with an optimal replacement level of 80%, resulting in a 21.16% increase compared to normal concrete. However, replacements above 80% led to a decline in compressive strength, particularly at the 100% replacement level, which showed a 9.37% reduction in strength compared to normal concrete. This decrease was caused by increased porosity, varying aggregate quality, and an imbalance in the water-cement ratio, which disrupted the hydration process and microstructure formation of the concrete. Based on these findings, coral stone can be an effective alternative to replace fine aggregate such as sand, but its use should be limited to 80% to maximize the strength improvement without reducing performance.

Effect of Adding Polypropylene Plastic Waste on Compressive Strength and Flexural Strength Concrete

2024-11-03T18:09:23+00:00

Indonesia is the second largest producer of plastic waste in the world after China with an annual contribution of 187.2 million tons of plastic waste. This study aims to analyze the effect of the addition of plastic seeds with polypropylene substitution on the compressive strength and flexural strength of concrete with the intention of reducing waste waste and utilizing it as a concrete mixing material and making concrete properties into green concrete. The method used is the experimental method by making several variations of concrete mixtures with plastic seeds of polypropylene type as a substitute for part of the sand. The mixing of plastic seeds is divided into several variations, namely, 3% polypropylene seeds and 6% polypropylene seeds. Analysis of the test results of the addition of polypropylene seeds compared to the concrete mixture without polypropylene seeds resulted in a compressive strength of 24.14 MPa for the addition of 3%, as well as a value of 23.25 MPa for the addition of 6% each at 28 days of concrete age. As for the flexural strength, an increase value of 0.16 MPa was obtained for the addition of 6% and the addition of 3% at the age of 28 days. This study shows that the results of the study have reached the planned quality target, namely the quality of fc'20 Mpa.

Design Micro-Hydro Power Plant Water Resources System for Small Medium Enterprise Rice Mill in Nagari Kamang Hilia Agam

2024-11-03T18:15:57+00:00

Processing rice products into rice requires further processing, where the grain harvested from farmers is processed into rice. The Nagari Binaan Community Service team from Padang State University will later develop this process. Farmer groups say that the availability of continuous and cheap electricity is their obstacle in producing good and cheap rice products. Counseling and assistance in making civil buildings capture turbulence water micro-hydro power plants is a solution to partner problems offered by the community service team of the Nagari program assisted by Padang State University. The output of the Nagari Fostered Program will be used to build a 5000-watt capacity power plant, supporting the need for free and environmentally friendly electricity. This aligns with the government's renewable energy program for 2030, which aims to produce 25% of the national electricity from renewable sources. This program is planned for 3 (three) stages, where the first year is mapping and detailed engineering design in the form of reports and design drawings. The second year is in the form of civil construction, and the third year's target is the installation of electrical machines and panels for commissioning. There will be training for partners, such as farmers in Kanagarian Kamang Hilia, Agam.

Volume Analysis of Mining Excavation Progress Using Unmanned Aerial Vehicle-Photogrammetry Method

2024-11-03T18:20:54+00:00

In recent years, the use of unmanned aerial vehicles (UAVs) has become an alternative for topographic mapping, and this is called the UAV-Photogrammetry method. Topographic mapping in mining activities is carried out to determine the progress of actual volume of material taken. However, in general, topographic mapping is carried out using terrestrial survey methods. These methods require a long data acquisition time and a lot of personnel. This paper focuses on surveying the volume of mining progress using the UAV-Photogrammetry method and compares it with truck count volume data. The results of this study showed that the deviation in volume calculations using UAV-Photogrammetry method compared with truck count volume data in week I was 233 m3 or 0.654%, week II was 214 m3 or 0.151%, week III was 496 m3 or 0.840%, and week IV was 243 m3 or 0.210%. The results of the t-test showed that there was no significant difference between the volume calculation using the UAV-Photogrammetry method and truck count data, which means both measurement types produce statistically similar results.

Sedimentation Analysis at Cariang Weir in Sumedang District using Mike 21 Software

2024-11-03T18:30:43+00:00

Sedimentation is the deposition of material carried by water media. The occurrence of sedimentation disrupts river flow, leading to increased susceptibility to flooding and drought during dry seasons. The impact of sedimentation causes riverbed siltation, reducing the river's capacity from its natural state. The Cariang Dam, located in Ujung Jaya Village, Ujung Jaya District, Sumedang Regency, is experiencing sedimentation issues. This has resulted in siltation and a decrease in the river's capacity at the dam site. In light of these issues, the researcher is interested in analyzing sedimentation at the Cariang Dam area. This analysis aims to determine the volume and height of sedimentation occurring annually. Based on the analysis conducted, the sedimentation height per day is found to be 0.7 centimeters, amounting to 23 centimeters per month and 276 centimeters annually.

Digitalization-Based Geometric Design of Open Pit Mining Blast Using Visual Block Programming Method

2024-11-03T18:37:42+00:00

Gilgal Batu Alam Lestari (PT. GILBAL) is a company specializing in granodiorite rock mining. In its mining operations, PT. GILBAL employs blasting to break down materials, simplifying the loading and processing stages. The design of blast hole geometry requires precise calculations to achieve an optimal configuration, ensuring that blast fragmentation aligns with operational needs. To facilitate the blast hole geometry calculations, an application is needed that delivers accurate results and can be accessed anytime, anywhere. One approach to developing this application is through visual block programming using the Kodular tool. The research aims to design a system programming concept for an application capable of processing calculations for both blast geometry design and blast fragmentation outcomes, implementing this application program for actual blasting operations in the field, and achieving high accuracy in the application design's performance when applied in real-world field conditions. Application testing for blast hole geometry calculations demonstrated that the R.L. Ash method achieved an average accuracy of 97.39%, the C.J. Konya method reached 98.49%, the Anderson method achieved 99.93%, and the Langefors method reached 99.95%. In terms of calculating blast fragmentation, the R.L. Ash method attained an average accuracy of 89.57%, the C.J. Konya method 93.49%, the Anderson method 86.50%, and the Langefors method 99.81%.

Analysis of Project Time and Cost using the Crash Program Approach

2024-10-09T07:40:10+00:00

Project acceleration is a solution to speed up project completion. Project acceleration has various alternatives, including adding overtime hours and adding labor. This research aims to assess the changes in project time and costs following acceleration efforts through options such as increasing working hours (overtime) and adding labor. The project acceleration method used is the crash program method, supported by the Microsoft Project application. The research results show that for the option of adding overtime hours, with 1 hour of overtime, the cost was Rp 27,011,372,606.28 and the duration was 204.13 days; for 2 hours of overtime, the cost increased to Rp 27,156,499,375.32 with a duration of 199.01 days; with 3 hours of overtime, the cost was Rp 27,307,828,821.71 and the duration shortened to 194.62 days; and with 4 hours of overtime, the cost was Rp 27,465,750,984.13 with a duration of 190.92 days. For the alternative of adding labor, under a scenario equivalent to 1 hour of overtime, the cost was Rp 26,846,481,892.32 and the duration was 204.13 days; with 2 hours of overtime, the cost was Rp 26,797,919,204.37 with a duration of 199.01 days; with 3 hours of overtime, the cost decreased to Rp 26,746,499,142.20 and the duration was 194.62 days; and for 4 hours of overtime, the cost was Rp 26,703,236,580.04 with a duration of 190.92 days. Thus, adding labor is identified as an effective alternative due to its economical cost, even though it results in the same project acceleration duration.