Study and Evaluation of bricks made from the local sand using sodium silicate as binder

Abstract

In this study, a mixture of (sand and sodium silicate (ratio 4:1) was composed ,where sodium silicate is used as a binding agent, and put in an furnace at differenttemperatures ranging from (200-1000 0C). It was observed that the density andcompressive strength with increasing temperature up to 800 0C degrees where thecompressive strength at its maximum of 12 MPa.the effect of the waste glass used in the mixture was studied by adding differentrates. It was observed that the density of the models increases with increased rates ofwaste glass, but at a temperature of 800 0 C noted that density decreases with theincrease in the proportion of the mixture, while there was a clear increase in thestrength of compression of the models with increased rates of waste glass . Also theprocess of sintering was studied was developed models that have the same ratio (sand(52%), waste glass (28%), sodium silicate (20%)) in an oven at a temperature of 800were the physical properties (density, compressive strength and volume) with thechange of time (4-20) hr the result show that the density decreases with increasingtemperature and also increased volume. The compression strength, decreases withtime but at 16 hr it reaches a maximum of more than( 6 MPa).Keyword: silica , waste glass, sodium silicate, compressive strength.