Abstract:
Pervious concrete is a special type of concrete consisting of cement, coarse aggregate and water. Cement
is a widely used raw material for construction including pervious concrete and had led to the release of
huge amounts of CO2 to the environment. Therefore, there is lot of research interest in finding
supplementary cementitious materials. The present study examined and compared the feasibility of
using industrial waste fly ash (FA) and agricultural waste rice husk ash (RHA) for sustainable pervious
concrete production. An experimental program was performed with substitution of FA and RHA
contents of 5%, 10%, 15% and 20% as cement replacement and water to binder ratio of 0.3, 0.35, 0.4
and 0.45. The characteristics of pervious concrete and sustainability analysis were compared for both
FA and RHA replacement with control concrete mortar. The results showed that both FA and RHA
have a negative effect on permeability. The compressive strength was optimum for FA content lies
between 10% and 15% replacement level and RHA content of 5% replacement level. Furthermore, the
utilisation of FA and RHA decreased production cost, the total embodied energy and carbon emission,
resulting in cost-effective and eco-friendly pervious concrete.
