MANUFACTURING POROUS CONCRETE BY AGGREGATING REMAINED CONCRETE AND ITS FUNDAMENTAL PROPERTIES

Abstract

This study aimed at proposing an idea for manufacturing porous concrete by aggregating remained concrete using flocculant. In experiment 1, influences of flocculant dosage on void ratio and compressive strength of the concrete were investigated. As a result, it was shown that the concrete including flocculant met the requirement of total void ratio for permeable pavement at a flocculant dosage of 2.0kg/m³, however, its compressive strength was smaller than that of normal porous concrete with the same void ratio. In experiment 2, to investigate the applicability of the concrete including flocculant to the permeable pavement, fundamental properties（void ratio, compressive strength, flexural strength, and permeability coefficient）of the concrete with a flocculant dosage of 2.0kg/m³ were evaluated. Our results showed that the concrete satisfied the requirements of void ratio and permeability coefficient for permeable pavement. However, the flexural strength of the concrete with a flocculant dosage of 2.0kg/m³ was smaller than that required for permeable pavement, so that more investigations are needed to enhance the flexural strength of the concrete including flocculant.