“Characteristics of M30 Grade Concrete Using Copper Slag As Partial Replacement for River Sand As Fine Aggregate”. International Journal of Engineering Research and Advanced Technology (ijerat) (E-ISSN 2454-6135) 7, no. 5 (May 25, 2021): 10–18. Accessed December 22, 2024. https://ijerat.com/index.php/ijerat/article/view/546.