Abstract: The design of permeable pavement is considered as a crucially important aspect in the construction of “sponge city”. The permeable pavement material with the largest amount of usage is permeable bricks, the common types of which are presently cement-based permeable bricks, ceramic-based permeable bricks and resin-based permeable bricks. Both of the former two types suffer obvious disadvantages though came into being earlier. And the resin-based permeable bricks exhibit outstanding performance and represent the future trend, as their water permeability, strength, timeliness, and filterability exceed greatly the current national standards. There are many factors which have influences upon the performance of resin-based permeable bricks, such as aggregate type, particle size, roundness, gradation, condensed material type, physicochemical characteristics, porosity, pore structure, and fabrication method. The comprehensive research on the influence principle and mechanism of these factors can be conducive to the improvement and optimization over composition design and fabrication process of resin-based permeable bricks. The studies of pore size, porosity and effective porosity have inversely proved that all of the following measures result in positive effect to permeable brick’s permeability: using open-graded aggregates, grafting hydrophilic groups on the end of resin’s side chain while preserving the epoxy part, effectively controlling adding amount of gelling agent. On the other hand, a pre-cementation calcination of the sand particles can decrease defects in the aggregate, reduce peelable adsorbate content on sand particle surfaces, and increase the adsorption strength between resin film and sand particle surfaces. Thereby the system can get significantly promoted in overall strength. In terms of molding method, the adoption of dynamic-load pressure molding has been found facilitative, compared to static-load pressure molding, to achieving higher compactness and more uniform pore distribution, and in consequence, higher mechanical strength of the brick product. This paper aims to provide systematic summary and discussion over the various factors influencing permeability and mechanical properties of resin-based permeable bricks, with emphases on raw materials (aggregate, cementitious materials, etc.), pore characteristics (porosity, pore structure, etc.), and fabrication methodology (prior treatment of aggregate such as calcination and coating treatment, brick forming methods).
张雄, 王啸夫. 若干因素对透水砖性能影响机理的研究进展[J]. 材料导报, 2019, 33(23): 3949-3954.
ZHANG Xiong, WANG Xiaofu. Research Progress on Influence Mechanism of Several Factors on PermeableBrick Performance. Materials Reports, 2019, 33(23): 3949-3954.
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