INORGANIC MATERIALS AND CERAMIC MATRIX COMPOSITES |
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Effect of Cyclic Clogging-Cleaning on Water Permeability of Porous Asphalt Mixture |
ZHU Xuwei1, LI Bo1,2, WEI Dingbang1,3, WEN Weijun2, ZHOU Jianing1
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1 Key Laboratory of Road & Bridge and Underground Engineering of Gansu Province, Lanzhou Jiaotong University, Lanzhou 730070, China 2 National and Provincial Joint Engineering Laboratory of Road & Bridge Disaster Prevention and Control, Lanzhou Jiaotong University, Lanzhou 730070, China 3 Gansu Province Transportation Planning, Survey & Design Institute Co., Ltd., Lanzhou 730000, China |
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Abstract In order to study the anti-clogging performance of porous asphalt pavement, the porous asphalt concrete (PAC) was clogged with aeolian sand as a clogging material, and the PAC specimens after each clogging were cleaned by manual brushing, vacuum pumping and high-pressure water washing. The permeability of each specimen after clogging and cleaning was measured using falling-head permeability setup. The effect of air voids, nominal maximum aggregate size and cleaning method on the permeability of PAC under the condition of cyclic clogging-clea-ning was investigated. Based on this, the clogging sensitive particles of PAC-13 were studied. The results show that the values of permeability kC after clogging and permeability after cleaning kR decrease rapidly and then gradually stabilize as the number of loadings increases.The anti-clogging performance and recovery effect of permeability of PAC increases with the increase of air void and nominal maximum aggregate size.The residual rate of water permeability of PAC specimens with different air void was significantly different, and the γ value of PAC specimens with larger air void was larger under the same cycle number. The cleaning effect was ranked as high-pressure water washing > vacuum pumping> manual brushing. Particles with the size range of 0.15—2.36 mm are the key particle sizes that cause the clogging of PAC-13 specimen, the particle size of PAC-13 clogging sensitive particle gradually increases with the increase of air void
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Published: 06 November 2020
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Fund:National Natural Science Foundation of China (51408287,51668038,51868042), Gansu Provincial OutstandingYouth Fund (1606RJDA318), Gansu Natural Science Foundation (1506RJZA064), Lanzhou Jiaotong University 100 Young Talents Training Program Fund, Lanzhou Jiaotong University Excellent Research Team (201606). |
About author:: Xuwei Zhu,master candidate, is learning at School of Civil Engineering, Lanzhou Jiaotong University. His research interest is functional road materials. He has published two academic papers (accepted), including 1 SCI. Bo Li iscurrently a professor of Civil Engineering, Lanzhou Jiaotong University,postdoctoral fellow of Georgia Southern University,winner of the Gansu Provincial Outstanding Youth Fund, was selected as one of the 100 outstanding young talent training programs (scientific research) of Lanzhou Jiaotong University.He is also the deputy secretary general of the Gansu Provincial Traffic Standardization Committee, a member of the Expert Committee of the Gansu Provincial Transportation Department, and the deputy director of the laboratory in the road network monitoring of Gansu Province.He received his Ph.D. degree in engineering from Chang’an University in June 2008. In the same year,he joined the Department of Road and Bridge Engineering of Lanzhou Jiaotong University.He is mainly engaged in research on functional characteristics and application of road materials, road surface functions and road maintenance technology.More than 70 academic papers were published by first author or newsletter author, including more than thirty retrieved from SCI/EI. And eleven patents are authorized. |
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