A Survey Paper on Utilization of Fly Ash and Silica Fume as a Partial Replacement of Cement in Rigid Construction

The environmental awareness and stern regulations on managing industrial waste, the world is increasingly turning to researching properties of industrial wastes and finding solutions on using their valuable component parts so that those might be used as secondary raw material for other industrial applications. Silica-fume is the bi- product of the ferrosilicon alloy production and Fly-ash is by-product of coal thermal power plants. To date, these by-products are being used in other industrial area and in the field of civil industries, such as in cement production along with clinker and in masonry work for civil works. Considering the specificity of physical and chemical properties of fly-ash and silica-fume and a series of possibilities for their use in concrete, this research work demonstrates the possibilities of using fly-ash and silica-fume together as partial replacements of cement in concrete. This research work presents an investigation of compressive strength and flexural strength of concrete by adding silica-fume and Fly-ash as partial replacement of cement in various percentages for M40 grade of concrete in rigid pavement construction.