ABSTRACT
The present study uses supplementary cementitious materials such as fly ash (FA), ground granulated blast furnace slag (GGBS) and metakaolin (MK). Eight mortar mixes consisting of control (M1), binary (M2), ternary (M3) and five quaternary mixes (M4 to M8) are prepared. M2 is made up using 65% OPC and 35% FA. M3 consists of 60% OPC, 35% FA and 5% MK. M4 is made up using 50% OPC, 35% FA, 5% MK and 10% GGBS. M5 consists of 40% OPC, 35% FA, 5% MK and 20% GGBS. 40% OPC, 25% FA, 5% MK and 30% GGBS are used to prepare M6. M7 is composed of 30% OPC, 25% FA, 5% MK and 40% GGBS. M8 is made up of 30% OPC, 35% FA, 5% MK and 30% GGBS. Binder to sand ratio used is 1:3 for all mortar mixes. Compressive strength test sat 3, 7, 28, and 90 days are conducted for all mortar mixes. Rapid chloride penetration tests (RCPT) at 28 and 90 days and drying shrinkage test sat 35 days are conducted for all mortar mixes. The compressive strength of M2, M3, M4, and M5 is at par compared to that of control mortar at 90 days. Lesser chloride ion penetration is observed for binary, ternary, and all quaternary mortars as compared to that of control mortar at 28 and 90 days. Drying shrinkage of binary, ternary, and all quaternary mixes is lower than that of control mortar at 35 days. Thus, it has been observed that compressive strength and RCPT, as well as drying shrinkage test, have been found to be better in quaternary mortar as compared to OPC, binary, and ternary mortars.
