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.
Highlights
In the process of global urbanization, more than 50% of the world's population live in cities ([1])
The heat island effect is caused by human factors, which changes the local temperature, humidity, air convection and other factors on the urban surface, and causes the urban microclimate change; Urban waterlogging refers to the phenomenon of waterlogging disaster in the city due to the heavy precipitation or continuous precipitation exceeding the urban drainage capacity
Kayhanian’s ([24]) study shows that when the diameter of harmful particles is larger than 38 microns, permeable concrete will be blocked, while Siriwardene’s ([25]) study shows that when the diameter of particles is smaller than 6 microns, particles in porous media will migrate with water, and a deposit layer will be formed at the bottom of porous materials to prevent water from penetrating underground
Summary
In the process of global urbanization, more than 50% of the world's population live in cities ([1]). The rapid development of economy and the acceleration of urbanization have brought convenience to human beings, and brought serious environmental pollution, resulting in many urban diseases. The typical urban diseases are "Heat island effect" and "Urban waterlogging". The heat island effect is caused by human factors, which changes the local temperature, humidity, air convection and other factors on the urban surface, and causes the urban microclimate change; Urban waterlogging refers to the phenomenon of waterlogging disaster in the city due to the heavy precipitation or continuous precipitation exceeding the urban drainage capacity. Urban climate and hydrological problems restrict the further development of the city, so it is urgent to find a reasonable solution in the process of urban construction and governance
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