The study of ultrasonic pulse velocity on plain and reinforced damaged concreteNi Nyoman Kencanawati, Akmaluddin, Buan Anshari, Ahmad Gazi Paedullah and Mitsuhiro ShigeishiMATEC Web Conf., 195 (2018) 02026DOI: https://doi.org/10.1051/matecconf/201819502026