Sustainable cementless concrete materials with combined recycled glass and natural fibres

Study level



Cement production has significant energy demand and contributes to high carbon emissions in concrete constructions. Geopolymer concrete (GPC) is one of the sustainable building materials due to its cementless composition.

This study investigates the mechanical properties of geopolymer concrete with different combinations of industrial by-products such as fly ash and steel slag as cement replacement. This study also explores the concrete performance by utilizing recycled glass as aggregate replacement.

The use of recycled glass in geopolymer concrete is one of the attractive solutions in mitigating environmental impact of glass waste from various waste streams.  Different percentages of waste glass as coarse and fine aggregate replacement with combined natural fibres such as hemp in green concrete are examined through standard testings such as compression, flexural and indirect tensile tests.