Effect of mix ratio, curing time and calcination temperature on abrasion resistance and water absorption of cement-periwinkle shell ash laterized concrete

Abstract

This study investigates the performance of periwinkle shell ash in resisting the effect of abrasion and water absorption in laterized concrete. PSA was calcined at three temperature levels (600, 800 and 1000°C) and two mix proportion (1:1:2 and1:2:4) with four levels of percentage replacement of PSA with cement (0, 10, 20, 30, 40%) were used. The specimen was subjected to two curing periods (28 and 56  days). It was observed that mix proportions significantly affect the abrasion resistance while an increase in abrasion resistance was  observed with specimen cured for 56 days over those at 28 days whereas specimen with calcined periwinkle shell ash produced high  resistance to abrasion over the control specimen. The rate of water absorption decreases as calcined PSA level increases whereas no  significant different was observed in the curing period while for mix proportion, 1:1:2 produces a high resistance rate to water absorption  than 1:2:4 across all level of calcined PSA replacement level, and curing ages with the control experiment absorbing more  water than all level of replacement.