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Analysis of properties of pervious concrete prepared with difference paste-coated recycled aggregate

机译:用差异粘贴涂层再生骨料制备的透水混凝土性能分析

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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.
机译:再循环聚集体(RA)与天然骨料不同,因为前者具有微观裂缝,例如微裂缝,薄弱的界面过渡区,这阻碍了其在渗透混凝土中的应用。在本研究中,首先通过表面粘贴涂层加固Ra。然后,获得具有不同尺寸Ra和糊状物的糊状涂层厚度与5%二氧化硅烟气流动性的关系,以及糊状物流动性,W / C比和超塑化剂(SP)剂量。最后,基于RA的两个关系和属性数据,制定了渗透的混凝土。所获得的渗透性混凝土呈现出优异的可加工性,具有足够的足够渗透率(超过6.5mm S(-1)),用于排出雨水和良好的机械性(28 d压缩强度达到18.5MPa)。这表明该方法是渗透混凝土混合比例的成功方法。 (c)2020由elestvier有限公司发布

著录项

  • 来源
    《Construction and Building Materials》 |2021年第1期|121244.1-121244.11|共11页
  • 作者单位

    East China Univ Sci & Technol Sch Resources & Environm Engn Shanghai 200237 Peoples R China;

    Shenzhen Univ Coll Civil & Transportat Engn Shenzhen 518060 Peoples R China;

    East China Univ Sci & Technol Sch Resources & Environm Engn Shanghai 200237 Peoples R China;

    Shanghai Res Inst Bldg & Sci Co Ltd Res Inst Bldg Mat & Solid Waste Recycling Shanghai 201108 Peoples R China|Shanghai Engn Technol Res Ctr Ind Solid Waste Rec Shanghai 201108 Peoples R China;

    Shanghai Res Inst Bldg & Sci Co Ltd Res Inst Bldg Mat & Solid Waste Recycling Shanghai 201108 Peoples R China|Shanghai Engn Technol Res Ctr Ind Solid Waste Rec Shanghai 201108 Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Recycled aggregate; Pervious concrete; Paste-coating ability; Cementitious material paste thickness; Scaling factor; Mixture proportioning;

    机译:再循环聚集;透水混凝土;粘贴涂层能力;水泥材料糊状厚度;缩放因子;混合比例;
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