Effect of GGBS on Properties of Lightweight Concrete

DOI: 10.5176/2301-394X_ACE15.104

Authors: Sherif Yehia, Ahmed Mirghani, Ghina Zannerni, and Wisam Abdulkatib

Abstract:

Properties of lightweight concrete are affected by the aggregate’s lower strength compared to normal weight aggregate. Therefore, its performance can be improved through the introduction of cementitious supplementary materials such as Ground Granulated Blast furnace Slag (GGBS). In this paper, the effect of using GGBS on a lightweight concrete mix was examined. Effects on workability, compressive strength, and flexural strength were evaluated. Results were compared with concrete mixes having other supplementary materials such as Silica Fume (SF) and Fly Ash (FA). Test results show that GGBS improved the compressive and flexure strength of the concrete containing lightweight aggregate. Its major effect was increasing the late age compressive strength at 56 days. Comparison of mechanical performance between GGBS and other combinations of supplementary materials is discussed throughout this paper.

Keywords: Sustainability; lightweight concrete; blast furance slag; fly ash; silica fume