Pengaruh Ground Granulated Blast Furnace Slag dan Rice Husk Ash sebagai Substitusi Semen terhadap Kuat Tekan High Strength Self Compacting Concrete

Abstract

In infrastructure development, concrete has a crucial role as a development material so that development is needed that can create high-quality concrete, fast implementation, and pay attention to environmental sustainability conditions. High Strength Self Compacting Concrete is one of the developments in the construction world. In this study, the effect of RHA and GGBFS as a partial substitution of cement to the criteria and compressive strength of High Strength Self Compacting Concrete was analyzed. The percentage of RHA used is 0%, 2%, 4%, 6%, 8%, and 10% and GGBFS 0% and 10% by weight of cement. The tests carried out were Particle Size Analyzer, X-Ray Fluorescence, Slump flow, T50, V-funnel, L-shape box, and compressive strength. PSA test results showed the size of RHA is 706 nm and GGBFS 409 nm. XRF test results show the highest RHA composition is SiO2 as much as 96.50%, while for GGBFS is CaO as much as 49.94%. From the slump flow and T50 tests, the greater the percentage of RHA addition, the smaller the flow rate and the slower the concrete flows to touch the diameter of 50 cm on the slump board. Based on the V-funnel test, as the increase in RHA will slow the flow of concrete and the longer it takes to empty the V-Funnel triangle. Based on the Lshape box test, the addition of RHA percentage resulted in a smaller value of blocking ratio. The optimum compressive strength value obtained in the variation of N6G10 is 6% RHA and 10% GGBFS with compressive strength of 74.99 Mpa increased by 4.40% from normal concrete.