Laminar foam glass as a lightweight concrete aggregate

Abstract

In this study, 100% recycled glass foam granules obtained from waste glass were tested as a lightweight concrete aggregate (LWA). The characteristics of the raw materials used, grain-size distribution, bulk density, self-strength, frost resistance, chemical composition and the morphology of foam glass were examined. Subsequently, a series of concrete mixes were proportioned with water-to-cement ratios (w/c) of 0.4 with 0-30 wt%. Foam glass granules and probe cubes were formed. The mechanical and physical properties of concrete samples, such as compressive strength, density, water absorption, and thermal conductivity were tested. In addition, compressive strength values were compared with lightweight concrete specimens containing the same amount of Liapor aggregates. The results showed that foam glass increased concrete's thermal insulation and density, and also decreased its water absorption. However, it significantly decreased its strength properties.