Mac-Eteli, H. D., & Overo, K. (2021). Sulphate Induced Strength Loss Index Optimisation of Periwinkle and Clam Shell Ash Hybrid Pozzolana Concrete. International Journal of Advances in Scientific Research and Engineering (IJASRE), ISSN:2454-8006, DOI: 10.31695/IJASRE, 7(8), 91–105. https://doi.org/10.31695/IJASRE.2021.34052