Component optimization of porous permeable brick in “sponge city” based on rainfall area division

Institute of Building Materials, School of Materials Science and Engineering, Tongji University, Shanghai, China

^* Corresponing author: 1710048@tongji.edu.cn

Abstract

The present study aims to prepare resin-based permeable bricks with micron-sized pores using fine aggregate with a particle diameter of 0.08mm-0.6mm and bisphenol-A epoxy resin, a polymer binder. The rainfall area of China was divided into 5 levels by using ArcGIS and Geoda geographic analysis software; The performance indexes of key components of resin-based permeable brick were selected by correlation with relevant standards, and the performance of materials is adjusted and designed according to the corresponding performance indexes, so as to meet the design requirements of “Sponge City”. The main method of material design is to adjust the key parameters of raw materials, such as aggregates, binder materials and admixtures, by using Image Pro Plus software and SEM and other test methods, so as to optimize the selection of “graded” aggregates and admixtures for different performance requirements scenarios to achieve the material selection goal. The highest permeable rate of resin-based permeable brick is 6.22× 10^–2cm/s s, and the maximum compressive strength is more than 60MPa.