Micromechanical Modelling of Pervious Concrete

Abstract

Pervious concrete is an unique and efficient way to meet growing environmental demands and to promote green and sustainable gr0wth. By entrapping rainwater and passing it to seep into the ground, pervious concrete is significant in reducing stormwater runoff, recharging groundwater and fulfilling Environmental Protection Agency (EPA) stormwater rules and regulations. Foremost characteristic of pervious concrete is open-pore structure that allows the transmission of water through it. Pervious concrete is cost effective and environmental favourable way to sustainable construction. Due to the presence of voids in it, various property relationships and variations are observed. In this report, characterization of pervious concrete through micromechanical modelling by analytical approaches is discussed. Micromechanical models are mainly focused upon the numerical modelling of RVEs, homogenization process is used for analysing the material characteristics and the structure property relationship for multi-scale modelling. Analytical techniques like Mean-Field Approaches and Mori-Tanaka methods are used to predict the properties of composite in presence of voids. Inclusion theory is followed for modelling in which voids are separated as inclusion from parent medium (matrix). These voids are assumed as spherical or ellipsoidal voids and composites are generally characterised by void volume fraction commonly known as void ratio. After using these above analytical approaches and relations, some numerical values are to be calculated for different shapes of inclusions so that they can be compared with the experimental values through plots.