The Effect of Different Admixtures on the Basic Properties of Recycled Pervious Concrete

Abstract

In this paper, we tested the effects of different admixtures at different dosages on compressive strength and water permeability of recycled pervious concrete. Through the research status-quo analysis of recycled pervious concrete at home and abroad, we determined the mix ratio for test use: water-cement ratio of 0.28, design porosity of 20%, recycled aggregate gradation of 5-10mm and 15-20mm, respectively. The effects of different admixtures at different dosages (i.e. fly ash, silica fume, polypropylene imitation steel fibres) on compressive strength and water permeability were investigated. The results show that all of the three admixtures can simultaneously increase the compressive strength to a certain extent and decrease the permeability coefficient. Our research findings provide an alternative of admixtures and their dosage in promoting the practical utilization of recycled pervious concrete.