Testing of Concrete Structures with Non-Destructive Test Method (NDT) Using Ultrasonic Pulse Velocity (UPV) at the Building on the Ancol Beach. CIVED [Internet]. 2024 Mar. 31 [cited 2025 Nov. 7];11(1):217-25. Available from: https://cived.ppj.unp.ac.id/index.php/CIVED/article/view/530