Pervious geopolymer concrete as sustainable material for environmental application

Abstract

Geopolymer binders are alternative construction materials to ordinary Portland cement (OPC), which is currently used for various applications. The process flexibility and the low carbon footprint of the geopolymer binders have led to the development of pervious geopolymer concrete. It helps to significantly reduce stormwater runoff, urban flooding and has the benefit of being less energy-intensive. Challenges of pervious concrete made up of ordinary Portland cement is the reduction in compressive strength while the void content increases. This research focuses on the development of geopolymer pervious concrete (GPC) to overcome the aforementioned challenge. Different geopolymeric compositions were mixed with aggregate of 10 mm and 20 mm and using different binder to aggregate ratios. Compressive strength and flexural strength of the developed fly-ash based geopolymer concrete were 39.9 MPa and 2.2 MPa, respectively, and the void content was maintained up to 37.7%, while density was 1988.14 Kg/m3.