Influence of Nano Silica and Nano Alumina on Packing Density of Cement Paste

Abstract

The nano silica and nano alumina is superfine filler materials. The superfine nano element is higher fineness then OPC. To maximize the particle packing density of cement paste, the particles may be selected in a form that they able to fill up the voids between large particles with smaller particles. The obtained paste is dense and stiff particle structure. As compare to normal cement past the effect of superfine elements on packing of cement is directly measure by wet pecking method and the water film thickness of cement paste. Packing density of cementations materials determined on the basis of amount of voids filled with water. Higher the packing density would demand less water to fill the void. The experimental work is dividing into three parts. Initially the influence of nano silica and nano alumina on particle packing density will be measured individual later the combined influence of both (nano silica and nano alumina) will be measured. Graph between compressive strength vs water cement ratio at curing of 7days and 28 days will also be plotted.