Ceramics-Silikáty

This research work investigates the reuse of laminated acoustic glass (LAG) as a partial binder replacement in fine-grained concrete. Ground glass powder (GP) was used to replace the binder in 3% increments, up to a maximum of 18%. The average particle size of the crushed GP used in the tests was 29.45 μm. The following properties of the fine-grained mortar were tested: fluidity, density, ultrasonic pulse velocity, flexural strength, compressive strength, and open porosity. These tests were carried out after 7 and 28 days of curing. The crushed LAG was also tested for alkali reactivity. The results showed that the addition of crushed glass increased the fluidity of the modified mortars. However, it reduced the density and ultrasonic pulse velocity of the hardened concrete. The flexural and compressive strength tests indicated that 12% is the optimal replacement level of the binder with crushed GP. The alkali-silica reaction (ASR) test revealed that the crushed LAG is non-reactive: cracks of 165 μm and an expansion of 0.1% were observed after 30 days.