High permeable concrete incorporating pozzolanic materials- An experimental investigation

High permeable concrete (HPC), due to its high void ratio and permeability, is considered as an option to substitute the conventional impervious pavements for managing stormwater runoff in a cost-effective and friendly environmental way. HPC is made of single graded sized of coarse aggregate bound together with ordinary cement without or with little fine aggregate. Due to its low compressive strength, HPC is only used as pavement material. For the purpose of developing a new type of HPC with enhanced structural strength without compromising its permeability, five pozzolanic materials (fly ash, silica fume, papermill ash, palm oil ash and rice husk ash) were used as partial replacement to ordinary cement. Their effects on the compressive strength, void ratio and permeability of HPC were investigated. It was found that 5% of cement replacement with pozzolan will lead to enhance the compressive strength and permeability of HPC.