透水混凝土块内部具有一系列与外部空气以及下部土壤垫层相连通的多孔结构，垫层土壤中丰富的毛细水通过自然蒸发和光照作用下的蒸腾作用，能够降低混凝土表面温度并维持一定的湿度，因此，透水混凝土对缓解城市热岛效应具有重要意义。本文对比透水混凝土和普通混凝土，研究含水量、风速、光照强度对混凝土表面温度、湿度的影响。结果表明：在模拟无降水的情况下，室内温度19℃时，30分钟后透水混凝土比普通混凝土表面温度低1℃左右，湿度约高2%左右；在模拟降水后有风的情况下，透水混凝土表面比普通混凝土温度低1℃~2℃，湿度高3%~9%。说明透水混凝土相对于普通混凝土具有一定的调节温度和较好的调节湿度功能。
Pervious concrete can allow the water to filter through the pavement and into the underlying soils. The water in the soil can evaporate into the outside air through the porous structure of pervious concrete which can decrease the temperature of the surface and increase the humidity of the surface, which can effectively minimize “hot island effect” in the city. The effects of pervious concrete on the temperature, humidity were studied at temperature of 19？C, the results show that pervious concrete can decrease the temperature of the surface by 1？C - 2？C, and increase the humidity of the surface by 3% - 9% compared with ordinary concrete. The evaporation of water in porous pervious concrete depends not only on the water in concrete, but also on the meteorological factors such as temperature and wind speed. It shows that pervious concrete has certain function of regulating temperature and humidity compared with ordinary concrete.
