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Article

A Comparative Study on Water and Gas Permeability of Pervious Concrete

1
Guangxi Construction Engineering Group Holdings Co., Ltd., 19 Pingle Road, Nanning 530201, China
2
College of Civil Engineering and Architecture, Guangxi University, 100 University Road, Nanning 530004, China
3
College of Civil Engineering and Architecture, Guangxi Minzu University, 188 University Road, Nanning 530006, China
*
Author to whom correspondence should be addressed.
Academic Editor: Enedir Ghisi
Water 2022, 14(18), 2846; https://doi.org/10.3390/w14182846
Received: 7 July 2022 / Revised: 30 August 2022 / Accepted: 30 August 2022 / Published: 13 September 2022
(This article belongs to the Special Issue Urbanization, Climate Change and Flood Risk Management)
The water and gas permeability of pervious concrete play essential roles in rainwater infiltration and plant root respiration. In this study, the gas and water permeability of pervious concrete samples were measured and compared. The water permeability was tested using the constant water head method and several water heads were measured for inspection, in which the permeability varied with the application of the pressure gradient. The permeability of gas was measured using a new simple gas permeameter, which was specially manufactured for measuring the gas permeability of pervious concrete under a stable pressure difference. A series of different gas pressure gradients was applied to test whether the gas permeability was a function of the applied pressure. Both the gas and water permeability of pervious concrete were found to decrease with an increased applied pressure gradient, which did not conform to the Klinkenberg effect (gas slippage effect). When comparing the gas permeability and water permeability of pervious concrete, we found that the water permeability was 4–5 times larger than the gas permeability. View Full-Text
Keywords: pervious concrete; root respiration; gas permeability; Klinkenberg effect; water permeability pervious concrete; root respiration; gas permeability; Klinkenberg effect; water permeability
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MDPI and ACS Style

Wei, G.; Tan, K.; Liang, T.; Qin, Y. A Comparative Study on Water and Gas Permeability of Pervious Concrete. Water 2022, 14, 2846. https://doi.org/10.3390/w14182846

AMA Style

Wei G, Tan K, Liang T, Qin Y. A Comparative Study on Water and Gas Permeability of Pervious Concrete. Water. 2022; 14(18):2846. https://doi.org/10.3390/w14182846

Chicago/Turabian Style

Wei, Gang, Kanghao Tan, Tenglong Liang, and Yinghong Qin. 2022. "A Comparative Study on Water and Gas Permeability of Pervious Concrete" Water 14, no. 18: 2846. https://doi.org/10.3390/w14182846

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