若干因素对透水砖性能影响机理的研究进展

doi:10.11896/cldb.18100139

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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).

Key words： permeable pavement aeolian sand epoxy resin permeable brick hydraulic conductivity compressive strength

Published: 30 September 2019

CLC number:

TU522.1

Fund:This work was financially supported by the National Key R & D Program of China (2016YFC0700800).

About author:: Xiong Zhang, Chairman of the Professor Committee of the Materials College of Tongji University, member of the Material Discipline Review Group of the Academic Degrees Committee of the State Council, Chief Scientist of the National 13th Five-Year Plan for Key R&D Programs, and Representative of the National People’s Congress. As the project leader and professor of Tongji University, he has undertaken a number of national provincial and ministerial projects: the National Natural Science Foundation of China, the National 973 Project, the National Science and Technology Support Program, the Western Science and Technology Project of the Ministry of Communications, and the National Key Research and Development Program. More than 20 scientific research results have been identified at the national, provincial and ministerial levels, and industrialization has been implemented or applied in engineering. Currently, he is currently chairing the National 13th Five-Year Key R&D Program. He has published more than 300 academic papers in academic journals at home and abroad, officially published 16 professional works, and obtained 15 national invention patents.
Xiaofu Wang graduated from Wuhan University of Technology in June 2011 with a bachelor’s degree in engineering. He is currently a Ph.D. student at Tongji University and is conducting research under the gui-dance of Professor Zhang Xiong. At present, the main research field is the construction of civil engineering materials “sponge city”.

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ZHANG Xiong,WANG Xiaofu. Research Progress on Influence Mechanism of Several Factors on PermeableBrick Performance[J]. Materials Reports, 2019, 33(23): 3949-3954.

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http://www.mater-rep.com/EN/10.11896/cldb.18100139 OR http://www.mater-rep.com/EN/Y2019/V33/I23/3949

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