Mac-Eteli, H.D. and 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 (Aug. 2021), 91–105. DOI:https://doi.org/10.31695/IJASRE.2021.34052.