为改善路面透水性能，聚合物透水混凝土已逐渐广泛用于海绵城市的建设中。本试验采用特细砂和环氧树脂制备透水材料，通过控制变量法，分别探讨了砂的粒径和聚合物掺量对透水混凝土的抗压强度以及透水系数的影响。同时还进行了堵塞的模拟实验，基于图像分析透水混凝土的孔径大小，通过观察混凝土的微观孔结构分析其性能变化规律。试验结果表明：在粒径相同的情况下，随着环氧树脂掺量的增加，透水混凝土的抗压强度逐渐提高，而透水系数逐渐下降；当骨料粒径为0.15-0.3mm的比例增大时，透水混凝土抗压强度呈现先增加后下降的趋势，而透水系数呈现不断增大的趋势。当骨料粒径为0.15-0.3mm，环氧树脂掺量为骨料质量的5%时，透水混凝土的平均孔隙率为14%，平均等效直径为214um。当粒径为0.15-0.3mm和0.3-0.6mm的骨料复掺比例为1：1时综合性能较好，抗压强度达41.7MPa，透水系数为1.7mm/s，制品经四次堵塞循环后，透水衰减系数小于20%，防堵塞性能良好。

In order to improve the permeable performance of pavement, polymer pervious concrete has been widely used in the construction of sponge city. Special fine sand and epoxy resin were used to prepare permeable materials. The influence of particle size and polymer dosage on the compressive strength and permeable coefficient of permeable concrete were discussed by controlling variable method. At the same time, the simulation experiment of blockage was carried out. Based on the image analysis of the aperture of the permeable concrete, and the properties of the concrete was analyzed by observing the microstructure of the concrete. The experimental results show that with the same particle size, with the increase of epoxy resin content, the compressive strength of the permeable concrete gradually increases, while the water permeability coefficient decreases gradually, When the particle size of aggregate is 0.15-0.3 mm, the compressive strength of permeable concrete appears to increase initialy and then decrease, while the permeable coefficient appears to increase continuously. When the aggregate particle size is 0.15-0 .3 mm and the epoxy resin is 5 % of the aggregate mass, the average porosity of the permeable concrete is 14 %, and the average equivalent diameter is 214um. The aggregate blending ratios with particle sizes of 0.15-0.3 and 0.3-0.6 were 1:1, with a compressive strength of 41.7MPa and a permeation coefficient of 1.7mm/s, showing best performance. After the product blocks four cycles, the permeability attenuation coefficient is less than 20%, and the anti-blockage performance is great.

TU473.1