INVESTIGATION ON INFLUENCE OF BIO MATERIALS IN INTERNAL CURING MORTAR

Curing plays a main role to mitigate the cracks due to autogenous and drying shrinkage. In general due to the scarcity of water and weather condition curing is not done properly. In this paper, internal curing of high performance mortars using presaturated Bio-LWA from sugarcane bagasse ash and extraction of milk from caltropis gigantea were studied. Firstly the strength of mortars were studied using partial replacement of fine aggregate with pre-saturated Bio-LWA at various proportions( 20%,25% & 30% by weight of fine aggregate) which is act as a internal curing agent. The Bio-LWA has high porosity and coarse structure which release the water during cement hydration which reduce the self-desiccation and shrinkage of mortars. Secondly the extraction of milk from calatropis gigantea used as internal curing agent (at the proportion of 0.3% by weight of cement and thirdly, along with Bio-LWA, the milk extracted from calatropis gigantia at the proportion of 0.3% by weight of cement ) used as a internal curing agent. The mechanical and durability of mortars were studied. Then these results are validated to the conventional mortar.