Estimation of Evaporative Cooling Effect on Porous Concrete Pavement

多孔混凝土具有高透水性和保水性，可用作路面材料。为了用热湿耦合方程计算多孔混凝土路面的热行为，对不同孔隙率的多孔混凝土的热湿性能进行了测量和识别。多孔混凝土的热行为计算结果与现场试验结果吻合较好。对不同路面和地面的热湿行为进行了数值分析，发现多孔混凝土路面的蒸发冷却效应远小于裸露地面。

A porous concrete has properties of high water permeability and water retentivity and is used as a pavement material. Thermal and moisture properties of porous concretes with different void fractions were measured and identified in order to calculate a thermal behavior of porous concrete pavement with simultaneous heat and moisture transfer equations. The calculated results for a thermal behavior of the porous concrete agreed well with results of field experiment. Numerical analyses of heat and moisture behavior for both various pavement and surface ground was conducted and it was found that the porous concrete pavement is much less than a bare ground in effect of evaporative cooling.