Performance of Self Compacted Concrete Using High Volume of Activated Fly Ash

The self-compacting concrete is most important development in this concrete Era, This world needs sustainable development in the every aspect of resources utilization. The goal of this research is to replacement in concrete with activated fly ash. Activated fly ash enhances the strength and durability of concrete at an early age, as well as its corrosion resistance. The fly ash is activated using a variety of processes, including mechanical (physical), thermal, and chemical activation. Chemical activation of fly ash by alkaline activators (i.e. alkaline solutions of high alkaline concentration chemicals like gypsum, sodium silicate and calcium oxide, KOH, etc.) improves the effectiveness of fly ash by dissolving the glassy layer of fly ash particles in cement concrete, increasing corrosion resistance. Chemical treatment of fly ash using chemical activators is used in this study to increase its quality. Chemicals such as sodium silicate and calcium oxide are utilized to activate the fly ash at the ratio of 1:6 for this study. The previous results show very satisfactory that the fly ash can be used to improve the properties of self compaction concrete. In this work experiments were carried out for the effective replacement of cement activated fly ash at different proportions. The aim was to investigate the characteristics of concrete with the addition of activated fly ash and comparing it with the control mix, thereby determining the advantages and disadvantages of doing so. In this activated fly ash is added to a 50%, 60% & 75% by partial replacement of cement. The fresh concrete is tested for slump test and the compaction factor test, while the hardened concrete for compressive, tensile, flexural strength and durability.