Utilization of crushed waste glass in shotcrete

The increasing price and diminishing reserves of natural sand and aggregates signify the urgency to develop a costeffective and eco-friendly alternative, helping the transition towards a circular economy. The ever-increasing amounts of waste glass stockpiled across Australia and worldwide (that offers nil residual value when landfilled) could offer a potential solution to this dilemma. That is, if optimally designed for reuse, waste glass utilization can promote environmental sustainability and closed-loop recycling of waste glass by decreasing the pressure on landfills, reducing the carbon footprint and conserving natural aggregates. This research aims to understand the applicability of crushed waste glass in shotcrete production. Several mix designs with up to 50% of sand replacement were prepared and tested according to standard recommendations. Mechanical strength and fracture properties of the new mix designs are compared and reported in this study against the controlled mixes at 0% waste glass inclusions.