Performance of concretes with the incorporation of waste from the process of stoning and polishing of glass as partial replacement of cement

Abstract

The incorporation of waste glass as partial replacement of cement in concretes can provide an alternative destination to the waste, reduce consumption of cement (minimizing CO2 emissions and natural resources consumption), and improve the concrete performance. Thus, this research evaluated the performance of concretes incorporating waste glass sludge (GS), resulting from the process of stoning and polishing of soda-lime flat glass, as supplementary cementing material. Mechanical strength and durability properties were assessed through compressive strength, alkali-silica reactivity, electrical resistivity and chloride permeability, diffusivity and migration tests. Mixtures containing metakaolin (ME) were also evaluated.  Results indicated that the use of the waste ground to an adequate size can replace up to 20% of cement. At this content, it caused a reduction of chloride penetration higher than 80%, reduced ASR and conserved compressive strength. The waste combination with metakaolin replacing 20% of cement also improved all the concrete properties, increasing compressive strength up to 12% at 28 days