Experimental investigation into the potential of recycled concrete and waste glass powders for improving the sustainability and performance of cement mortars properties

Abstract

This comprehensive experimental investigation delves into the world of sustainable mortar mixtures by introducing recycled concrete powder (RP) and waste glass powder (GP) as partial substitutes for conventional Portland cement (OPC). The primary goal is to assess how these substitutions affect the mechanical, physical, and durability characteristics of mortar. RP and GP are individually and jointly incorporated at substitution rates of 10 %, 15 %, and 20 % by weight of cement. The study encompasses a wide range of tests, including compressive and flexural strengths, acid resistance, workability, and microstructural analysis. The study shows that replacing 10 % cement with RP increases mortar compressive strength by 13.28 % after 90 days, and a combination of 15 % GP and RP improves mortar durability against chemical attack. Economic evaluations confirm cost savings exceeding 10 % for all blended mortars compared to OPC. The environmental perspective, explored through a carbon footprint assessment, demonstrates substantial reductions in CO2 emissions when RP and GP are employed in lieu of OPC. Overall, this study highlights the potential of utilizing recycled materials, to enhance the performance and durability of cement-based concrete production.