Abstract
AbstractThe construction industry in Ethiopia is booming with a resulting increase in requirement of cement concrete as an input. The industry faced with depletion of natural aggregate, increasing the scarcity of landfills, haulage and landfill costs. The environmental and economic concern is not limited to concrete wastes but it also includes non-degradable wastes originating from materials like waste glass. In this study, recycled concrete aggregate (RCA) produced from a demolished concrete structure and waste glass powder (WGP) sourced from end-life and broken glass containers and bottles are used. A detailed experimental analysis is conducted to assess the workability and compressive strength of recycled aggregate concrete (RAC) made with partial replacement of natural aggregate (NA) and cement by recycled concrete aggregate (RCA) and waste glass powder (WGP) respectively. A concrete mix prepared with 0%, 25%, 50%, and 75% replacement of NA by RCA and 0%, 10% and 20% partial replacement of cement by WGP in each RAC mixes. The result shows that the waste glass powder replaced recycled aggregate concrete shows better workability and compressive strength development than the recycled aggregate concrete mix without waste glass powder and comparable with the control mix. The waste glass powder (WGP) as a partial replacement of cement can overcome the limitations of recycled concrete aggregate and paving the way for its broadly used in recycled aggregate concrete (RAC) production. The outcomes of this research would assist the growing construction industry to be sustainable thereby reducing waste and conserving the natural resource.KeywordsRecycled concrete aggregate (RCA)Recycled aggregate concrete (RAC)Waste glass powder (WGP)WorkabilityCompressive strength
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