Recycled waste glass powder as a partial replacement of cement in concrete containing silica fume and fly ash

Abstract

Waste glass (WG) generates severe environmental problems, indeed owing to the inconsistency of WG Rivers. With increasing environmental challenges to decrease solid wastes and reuse them as much as possible, concrete manufacturing has utilized several techniques to accomplish this objective. The principal goal of this study is to search the appropriateness and the effect of using waste glass powder (WGP) as a partial substitution of cement weight for three main types of concretes.These three essential types are ordinary concrete, concrete containing silica fume (SF), and concrete containing fly ash (FA). The WGP replacement ratios from cement weight were 0 %, 5 %, 10 %, 15 %, and 20 %. Some mechanical and other concrete properties have been investigated at both hardened and fresh stages.The test results showed the appropriateness of WGP utilization as cement in concrete. Utilizing a 5 % WGP proportion raises the compressive and tensile strengths of ordinary concrete (group 1) by about 8 % and 13 %, respectively, related to the control mix [without waste glass powder]. At all ratios of WGP replacement, the compressive and tensile strengths of silica fume and fly ash concrete (groups 2, 3) decreased compared to control concretes. This reduction was about 13 %–14 %, respectively, at a 20 % WGP ratio. Additionally, the water absorption and density of plain, SF, and FA concrete mixes incorporating the proportions 5 %–20 % WGP as a partial replacement of cement weight decreased compared to reference concretes [0%WGP].The fresh and dry density of ordinary concrete (group 1) lessened by around 3 % compared to control concrete at a 20 % WGP ratio. The decreasing ratios in water absorption of groups 1,2, and 3 specimens made of 20 % WGP compared to control concrete [0%WGP] are 27.78 %, 14.75 %, and 18.75 % respectively. The workability increased by increasing the WGP content for all concrete types utilized in this study.