Sustainable Building Materials: The Role of Waste Glass Powder in Improving UHPC Performance and Lowering CO2 Emissions

Abstract

With the widespread use of glass products, a large amount of glass solid waste is generated worldwide annually. In the preparation of ultra-high performance concrete (UHPC), waste glass powder (WGP) can be used to replace part of river sand, thereby reducing the consumption of river sand (RS), promoting the reuse of waste glass, and lowering CO2 emissions. By replacing RS with WGP in different proportions, followed the standard test method of the spread diameter of freshly mixed UHPC in both vertical and horizontal directions, the standard test method of compressive and flexural strengths, the fluidity, compressive strength, and flexural strength of UHPC were tested. The experimental results show that the incorporation of WGP does not affect various performance indicators of concrete materials. It not only reduces the usage of RS but also lowers carbon emissions. The findings of this study are significant for promoting the research and development of ultra-low energy consumption building materials and the large-scale development of low-carbon buildings.