Experimental study on self-compacting concrete with replacement of coarse aggregate by light expanded clay aggregate

Abstract

The present study deals with fresh and hardened concrete properties of self-compacting concrete while carrying several trial mixes with a variety of water binder ratio and super-plasticizer content and finally achieved a trail mix with satisfying the flow properties as slump flow, V-funnel, and L-box test apparatus values are obtained within the limits of European guidelines. This study was carried out on the properties of Lightweight self-compacting concrete (LWSCC) with a binder content of 517 Kg/m3. In the achieved proportion of the final trail mix, the coarse aggregate will be replaced by Light Expanded Clay Aggregate (LECA) by varying the different percentages of coarse aggregate as 0%, 10%, 20%, 30%, 40%, and 50% by volume replacement. The fresh concrete properties are determined, and the values were found in considerable range as per European guidelines by performing slump flow, V-funnel, and L-Box tests for various proportions (0%, 10%, 20%, 30%, 40%, and 50%) of LECA aggregates by replacing normal coarse aggregates. The hardened concrete properties are determined by performing Compressive strength, split tensile strength, ultrasonic pulse velocity, and rebound hammer tests after curing specimens for 7 days and 28 days. Results indicate that LECA replacement in SCC up to 30% gives fair results in split tensile & compressive strength. NDT results show values are gradually decreasing with an increase in LECA proportion. Beyond 30% of LECA replacement in SCC gives results of split tensile, compressive strength, ultrasonic pulse velocity, and rebound hammer tests which are not inconsiderable range.