基于再生粗骨料裹浆厚度的含砂透水混凝土配合比设计方法

doi:10.11896/cldb.21020037

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Abstract The effects of additive content on the fluidity of cementitious paste under different W/B ratio were studied, and ementitious paste fluidity, sand/paste mass ratio on the mortar thickness of RCA were experimentally investigated. Two mathematical correlation models were established, which were the fluidity of cementitious paste and the dosage of admixture, the mortar thickness on RCA, and cementitious paste fluidity and the mass ratio of sand to cementitious paste. The two mathematical correlation models were applied to the mix design of pervious concrete. The results show that the thickness of recycled coarse aggregate coating mortar increases with the decrease of fluidity of mortar, and the larger the size of recycled coarse aggregate is, the greater the coating thickness is. The recycled aggregate RCA-9.5 was used to prepare sand-containing pervious concrete. The mortar paste can stably wrap the coarse aggregate, and there are no problems such as slurry leakage, bottom sea-ling, exposed frame etc. The 28 d compressive strength and 28 d flexural strength of concrete specimen are 14.1—17.1 MPa and 2.0—2.7 MPa, respectively. The permeability coefficient is greater than 6 mm·s^-1, and the concrete specimen has good frost resistance and wear resistance.

Key words： recycled coarse aggregate mortar thickness of aggregate pervious concrete with sand mixture proportioning design

Published: 25 February 2022 Online: 2022-02-28

CLC number:

TU528

Fund:Science and Technology Innovation Action Plan of Shanghai Science and Technology Commission (16DZ1202005,17DZ1202400,17DZ1201404).

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	Articles by authors
	YANG Lixiang
	SONG Xingfu
	LU Meirong
	XIA Yuehui

Cite this article:

YANG Lixiang,SONG Xingfu,LU Meirong, et al. The Mixture Proportioning Design of Sand-containing Pervious Concrete Based on Mortar Thickness of Recycled Coarse Aggregate[J]. Materials Reports, 2022, 36(4): 21020037-7.

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http://www.mater-rep.com/EN/10.11896/cldb.21020037 OR http://www.mater-rep.com/EN/Y2022/V36/I4/21020037

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