UTILIZATION OF GLASS WASTE AS FINE AGGREGATE IN CONSTRUCTION MATERIALS

Abstract

As the dwindling amount of raw material and its contribution to climate change are of concern recently, the employment of waste material in concrete technology for sustainable construction is inevitable and has gained attention worldwide. The usage of glass as fine aggregates in concrete can help to relieve the environmental issue related to both waste glass and concrete industry. The mechanical properties (workability, compressive strength, tensile splitting strength, flexural strength and elastic modulus) and the alkali-silica reaction (ASR) of concrete with different proportion of glass replacement on fine aggregates were evaluated. Concrete with different percentage of glass replacement by mass (25%, 50%, 75%, 100%) was tested and compared with control mix (0% replacement). The incorporation of glass into the concrete has detrimental effect on workability and compressive strength but it brings beneficial effect on density, tensile strength, flexural strength and elastic modulus of concrete. The incorporation of glass into mortar will not cause unacceptable ASR expansion even with 100% replacement. A 25% replacement is the most suitable proportion to have best performance of workability and mechanical properties and can be used in construction practice for economic and environmental benefits.