Advancing Self-Compacting Concrete with Sustainable Materials: A Performance Study

This research focuses on the workability and strength properties of self-compacting concrete that is utilising fly ash and marble powder. It intends to discuss whether SCC can utilize industrial waste to make things better and more sustainable. Six different mix ratios were prepared for M40 grade concrete. The replacement ratios for cement ranged from 0% to 40%. We utilized slump flow, V-funnel, L-box, and J-ring tests for fresh concrete characteristics. We used axial, split tensile and flexural strength tests at 7, 14, and 28 days to check the properties of hardened concrete. The results show that all the mixtures satisfied EFNARC's SCC requirements. Workability decreased with the increase in replacement levels; however, it remained within acceptable limits. Mechanical strength increased with the increase in replacement levels up to the optimal replacement level. Mix T5-where axial, tensile, and flexural strengths were determined to be maximum, i.e., 54.54 MPa, 5.13 MPa, and 3.35 MPa, respectively. Beyond this replacement level, the strength qualities showed a decreasing trend due to the dilution of the cementitious matrix by the mixture. The results show that the addition of fly ash and marble powder to SCC could reduce OPC usage and extend its life, making it environmentally friendly, without sacrificing performance.