文献类型：期刊文献

英文题名：Analysis of properties of pervious concrete prepared with difference paste-coated recycled aggregate

作者：Yang, Lixiang[1];Kou, Shicong[2];Song, Xingfu[1];Lu, Meirong[3,4];Wang, Qiong[3,4]

机构：[1]East China Univ Sci & Technol, Sch Resources & Environm Engn, Shanghai 200237, Peoples R China;[2]Shenzhen Univ, Coll Civil & Transportat Engn, Shenzhen 518060, Peoples R China;[3]Shanghai Res Inst Bldg & Sci Co Ltd, Res Inst Bldg Mat & Solid Waste Recycling, Shanghai 201108, Peoples R China;[4]Shanghai Engn Technol Res Ctr Ind Solid Waste Rec, Shanghai 201108, Peoples R China

年份：2021

卷号：269

外文期刊名：CONSTRUCTION AND BUILDING MATERIALS

收录：;EI(收录号：20204409435124);WOS:【SCI-EXPANDED(收录号:WOS:000604773000020)】；

基金：This work was supported by the Shanghai `Science and Technology Innovation Action Plan' in the field of social development (Grant Number 17DZ1202400, 17DZ1201404), Shanghai industrial solid waste recycling engineering technology research centre (Grant Number 18DZ2283400). Their financial supports are gratefully acknowledged.

语种：英文

外文关键词：Recycled aggregate; Pervious concrete; Paste-coating ability; Cementitious material paste thickness; Scaling factor; Mixture proportioning

摘要：Recycled aggregate (RA) differs from natural aggregate because the former possesses microstructure disadvantages, such as micro-cracks, weak interface transition zones, which hinder its application in pervious concrete. In this study, RA was firstly reinforced by paste-coating on the surface. Then, the relationship between paste-coating thickness with different size RA and paste with 5% silica fume fluidity, and that of paste fluidity, w/c ratio and superplasticizer (SP) dose were obtained. Finally, based on the two relationships and properties data of RA, the pervious concrete was formulated. The obtained pervious concrete presented excellent workability, a large sufficient permeability (more than 6.5 mm s(-1)) for draining rainwater and good mechanical resistance (28 d compressive strength reached 18.5 MPa). This indicates that the proposed method is a successful approach for mixture proportioning of pervious concrete. (C) 2020 Published by Elsevier Ltd.