Effect of Silica Fume and Fly Ash as Partial Replacement of Cement on Strength of Concrete

Abstract

Concrete is the most versatile construction material because it can be designed to withstand most stringent environments while taking on the most inspirational forms. It is one of the most frequently used building materials. Nowadays, most concrete mixture contains auxiliary cementitious material which forms part of the cementitious constituent. In this era, as the growth of world economy increased, the demand of concrete made buildings are also increased. So for this the demand of cement is also increased. Unfortunately, production of cement involves emission of large amounts of carbon–dioxide gas into the atmosphere which is very harmful for the environment. Cement manufacturing industries emits 5% of global carbon di-oxide which in turns leads to the main causes for the global warming. To decrease the effects we can change the cement with industrial by- product like silica fume, fly-ash and so on. Basically the Fly Ash and Silica Fumes are industrial by-products. The consumption of these industrial by products is becoming popular throughout the world because of the minimization of their potential perilous effects on environment. This paper investigates the individual effects of Silica Fume and Fly Ash as a partial replacement of Ordinary Portland Cement (OPC) on compressive strength, flexural tensile strength and split tensile strength of Concrete.