“The Exploration of a Double and Ternary Composite of Self-Compacting Concrete with Metakaolin and GGBS’’

Abstract

Self-Compacting Concrete (SCC) is a modern form of concrete that does not involve vibration it during laying or compaction operations. The use of fine materials such as Metakaolin (MK) and GGBS can ensure the required concrete property. One possibility for minimising the cost of self-compacting concrete is to employ mineral admixtures such as Metakaolin and GGBS. It also lowers the heat of hydration. This study adopted (OPC 53) and M30 grade of concrete. In the first trail, MK was kept constant at 5% while GGBS was varied starting at 30% with increments of 5% (30%, 35%, and 40%). In the second trail, MK was kept constant at 10% while GGBS was varied starting at 30% with increments of 5% (30%, 35%, and 40%) replacement by the weight of Portland cement, and performance is assessed and compared to conventional concrete mix. The effect of mineral admixtures on self-compacting concrete workability, compressive strength, splitting tensile strength, flexural strength, and modulus of elasticity, With a water cement ratio of 0.47 and manufacturing sand as fine aggregates and 12.5 mm coarse aggregates, a powder content of 520 kg/m3 (as per IS code10262-2019) is chosen as the binder material (Fine aggregate and cement) To improve the flow of the concrete, the superplasticizer poly carboxylate ether was used. As a result, self-compacting concrete's flow and filling capacities have significantly improved. MK5 (double blended mix) and MK5 + GGBS35 (triple blended mix) have higher 28-day strength than other mixes, while MK5 + GGBS35 has a higher modulus of elasticity than other mixes.