Compressive Strength and Microstructure of Cement Paste Containing Car Glass Powder

Abstract

This research aims to study the effect of fineness and contents of car glass powder (CGP) on the properties of cement paste. Coarse and fine car glass powders with median particle sizes of 26.5 and 12.6 µm, respectively, were used to replace Portland cement at 0%, 10%, 20%, 30%, and 40% by weight. The water to binder ratio of 0.35 was used for all the blended cement paste mixtures. The properties of cement paste including setting time, flow, compressive strength, and microstructure analysis were studied. The compressive strengths increased with the increase in CGP fineness while the increasing of CGP contents significantly reduced the 7- and 28-day compressive strengths. The microstructure analysis of cement pastes at 28 days pointed that the denseness and homogeneity of cement pastes decreased with the increase in CGP contents. However, the cement pastes containing 10-40% CGP produced the similar 90-day compressive strength to the control cement paste.