Destructive and non-destructive testing of the performance of copper slag fiber-reinforced concrete by Chakrawarthi, Vijayaprabha, Dharmar, Brindha, Avudaiappan, Siva, Amran, Mugahed, Flores, Erick Saavedra, Alam, Mohammad Ayaz, Fediuk, Roman, Vatin, Nikolai Ivanovicn, M. Rashid, Raizal S.