Effect of Millet Husk Ash - Nano Silica particles on strength properties of concrete

Abstract

In construction, one of the most frequently used materials is concrete, which meets the production of about 27.3billion tons annually by 2015. Generally concrete is comprised of cement, water and aggregates (fine and coarse aggregates) in a measured quantity. It is used globally in a massive amount when compared with other building materials like steel, wood, plastic. An enormous consumption of concrete results in increased demand for for the cement thereby increasing its production. Cementitious composite materials made from Portland cement find its far-reaching applications in construction domain. In this modern era, the industrial growth and technological development put forth the he requirement for colossal infrastructure. This results in the production of cementin the huge quantities. An immense production of cement has numerous environmental effects due to the emission of harzadous pollutants like particulates and green house gases. In recent times, some researchers developed the aggregates from industrial by-products and agricultural waste which is incorporated to cement-based materials to attain sustainability. By proportioning the cement with materials having smaller sized particles can influence the physical and chemical and ending in betterment of pore structure. It has been proven that incorporation of Nano-sized cementitious materials has its impacts on the performance of the structure due to its high volume fraction to the surface area. This study thereby is a report of attempt at utilizing Millet husk ash (MHA) as SCM in concrete. This article presents results on 28th day compressive, flexural and tensile splitting strength of concrete mixture for 100mm x 500mm concrete Beam and 100mm diameter x 200mm long. Curing of specimens was done by immersion in water for 7, 21 and 28 days