Experimental Study on Impact-abrasion Resistance of Recycled Aggregate Pervious Concrete

CHEN Shou-kai; ZHANG Zheng-nan; ZHENG Yong-jie; GUO Lei; WANG Lun-yan

doi:10.11988/ckyyb.20190514

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Journal of Changjiang River Scientific Research Institute ›› 2020, Vol. 37 ›› Issue (7) : 153-159. DOI: 10.11988/ckyyb.20190514

HYDRAULIC STRUCTURE AND MATERIAL

Experimental Study on Impact-abrasion Resistance of Recycled Aggregate Pervious Concrete

CHEN Shou-kai^1,2,3,4, ZHANG Zheng-nan^1,2,3, ZHENG Yong-jie⁵, GUO Lei^1,2,3,4, WANG Lun-yan^1,2,3,4

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Abstract

Impact-abrasion resistance is the key factor that affects the service life and applicability of recycled aggregate pervious concrete. At present, systematic research is lacking in China and abroad. The influences of water-cement ratio, chopped basalt fiber, fly ash, replacement rate of recycled aggregates, and amount of double-grained aggregate (5-10 mm, 10-20 mm) on the wear resistance of recycled aggregate pervious concrete were examined in this research. Test results indicate that when water-cement ratio exceeds 0.27, the mass loss from the recycled aggregate pervious concrete increases as the water-cement ratio rises, which means that the impact-abrasion resistance is ideal at a water-cement ratio of 0.27. The incorporation of 10% fly ash could improve the impact-abrasion resistance of recycled aggregate pervious concrete. As the replacement rate rises, the impact-abrasion resistance ameliorates at first and then reduces; the impact-abrasion resistance is optimal at the replacement rate of 50%. The double-grained grade is conducive to the improvement of impact-abrasion resistance of recycled aggregate pervious concrete. In addition, strength, density, and porosity are the main factors affecting the impact-abrasion resistance of recycled aggregate pervious concrete. In general, the greater the strength and density or the lower the porosity, the better the impact-abrasion resistance tends to be.

Key words

recycled aggregate pervious concrete / impact-abrasion resistance / mass loss / influencing factors / statistical rule

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CHEN Shou-kai, ZHANG Zheng-nan, ZHENG Yong-jie, GUO Lei, WANG Lun-yan. Experimental Study on Impact-abrasion Resistance of Recycled Aggregate Pervious Concrete[J]. Journal of Changjiang River Scientific Research Institute. 2020, 37(7): 153-159 https://doi.org/10.11988/ckyyb.20190514

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