Construction of a nonlinear permeability model of pervious concrete and drainage simulation of heavy rain in a residential area

Abstract

One of the aim of the paper is to demonstrate nonlinear permeability behaviour of pervious or porous concrete (PC). Paper summarises the results of the study which showed that mean flow velocity and hydraulic gradient are related through exponential function, then Darcy’s law of linearity is not applicable for PC. Further, applicability of PC in residential areas is shown by assessing PC’s pavement drainage properties through computer simulation. Results show that the non-linear permeability model of pervious concrete obtained from vertical permeability tests is applicable for horizontal direction of flow as well. In addition, it is confirmed that PC’s effectiveness can be expected in decreasing and delaying a peak runoff of rain waters into rivers when PC pavement is widely arranged in a city block.