Reusing of Crushed Tempered Glass Waste as a Partial Replacement for Natural Fine Aggregate in the Sustainable Concrete

This article analyzes the properties of concrete in which up to 25% of natural fine aggregate (sand 0/4 mm fraction) was partly replaced by the crushed tempered glass waste. The granulometric composition of crushed glass waste and 0/4 mm fraction sand was unified to ensure comparable particle size distributions between the natural aggregate and the crushed tempered glass waste. The alkali silica reactivity of crushed tempered glass waste particles was evaluated. The influence of crushed tempered glass waste on the properties of fresh concrete mixture and hardened concrete was determined experimentally. Results have shown that crushed tempered glass waste is non-reactive and can be used in concrete as a partial replacement of natural fine aggregate. Partial replacement of natural fine aggregate with crushed tempered glass waste caused only an insignificant decrease in the density of the concrete mixture, while the entrained air content increased, and the slump decreased more noticeably. The addition of crushed tempered glass waste decreased the density, compressive strength, and depth of water penetration under pressure of all modified concretes. On the other hand, all modified concretes had increased water absorption and closed or total porosities, which improved their durability in terms of the number of freeze and thaw cycles.