This research work focuses on the experimental investigation on compressive strength and micro-structural property of Self-Compacting Concrete (SCC) of various mix proportion of fly ash (FA) and ground granulated blast furnace slag (GGBFS). Moreover, utilization of mineral admixtures in SCC not only reduces cost but also reduces the heat of hydration and gives a dense structure. Initially, optimization is done using compressive strength as parameter to finalize the proportion of fly ash and GGBFS for microstructural analysis. Samples of 14th and 28th day cubes were collected from the optimized mix proportion and subjected to Scanning Electron Microscope (SEM), XRay Diffraction (XRD) and Thermogravimetric Analysis (TGA). The images were interpreted and the result from micro-structural analysis were compared with their compressive strength. The experimental result showed that mix with 20% fly ash had better compressive strength and formation of hydrated products compared to other mixes.

Keywords : Self-Compacting Concrete, Fly Ash, Ground Granulated Blast Furnace Slag, Scanning Electron Microscope X-Ray Diffraction and Thermogravimetric Analysis.