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Advances in Concrete Construction Volume 6, Number 4, August 2018 , pages 363-373 DOI: https://doi.org/10.12989/acc.2018.6.4.363 |
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Effect of porosity on frost resistance of Portland cement pervious concrete |
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Wuman Zhang, Honghe Li and Yingchen Zhang
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| Abstract | ||
| Portland cement pervious concrete (PCPC) is an effective pavement material to solve or reduce the urban waterlogging problems. The Mechanical properties, the permeability, the abrasion resistance and the frost resistance of PCPC without fine aggregate were investigated. The increase of porosity was achieved by fixing the dosage of coarse aggregate and reducing the amount of cement paste. The results show that the compressive strength and the flexural strength of PCPC decrease with the increase of porosity. The permeability coefficient and the wear loss of PCPC increase with the increase of the porosity. The compressive strength and the flexural strength of PCPC subjected to 25 freeze-thaw cycles are reduced by 13.7%-17.8% and 10.6%-18.3%, respectively. For PCPC subjected to the same freeze-thaw cycles, the mass loss firstly increases and then decreases with the increase of the porosity. The relative dynamic modulus elasticity decreases with the increase of freeze-thaw cycles. And the lower the PCPC porosity is, the more obvious the dynamic modulus elasticity decreases. | ||
| Key Words | ||
| Portland cement pervious concrete (PCPC); porosity; physical properties; freeze-thaw cycles | ||
| Address | ||
| Wuman Zhang, Honghe Li and Yingchen Zhang: Department of Civil Engineering, School of Transportation Science and Engineering, Beihang Univerisity, Beijing, 100191, China | ||
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