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Study on the structure and properties of autoclaved aerated concrete produced with the stone-sawing mud

机译：切石泥生产的高压灭菌加气混凝土的结构与性能研究

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摘要

The mineral composition of the stone-sawing mud is mainly quartz, containing a small amount of sodium feldspar and potassium feldspar. It could be instead of river sand to be used for preparation of the autoclaved aerated concrete (AAC). The results showed that under the same condition, the porosity rate of the AAC with stone sawing mud and river sand was 73.3% and 74.6% respectively. The average pore size was 0.82 mm and 0.95 mm respectively. The AAC prepared with stone sawing mud and river sand have good thermal insulation performance with the thermal conductivity of 0.14 W/(m.K). As the amount of stone sawing mud replacing the river sand increased gradually, the bulk density and the compressive strength of the AAC were gradually increased. The X-ray diffraction (XRD) and scanning electron microscope (SEM) showed that the amount of hydrated products of the tobermorite and the calcium silicate hydrates (C-S-H) in the AAC with stone-sawing mud were more than that in the AAC with the river sand. The crystallization of tobermorite crystals in the AAC with the stone-sawing mud grew into a leaf shape, and interleaved with each other to form a dense structure net, which made the AAC with improved mechanical properties. (C) 2018 Elsevier Ltd. All rights reserved.
机译：切石泥的矿物成分主要是石英，其中含有少量的钠长石和钾长石。可以用它代替河砂来制备高压灭菌的加气混凝土（AAC）。结果表明，在相同条件下，石材锯泥和河砂的AAC的孔隙率分别为73.3％和74.6％。平均孔径分别为0.82mm和0.95mm。用石锯泥和河砂制备的AAC具有良好的隔热性能，导热系数为0.14 W /（m.K）。随着石锯泥替代河沙的量逐渐增加，AAC的堆积密度和抗压强度逐渐增加。 X射线衍射（XRD）和扫描电子显微镜（SEM）表明，含石泥的AAC中雪辉石和硅酸钙水合物（CSH）的水合产物含量高于含石泥的AAC中的水合物含量。河沙。在锯齿状泥浆中，AAC中的硅钙石晶体结晶成叶状，相互交错形成致密的结构网，使AAC的机械性能得到改善。 （C）2018 Elsevier Ltd.保留所有权利。

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  • 来源
    《Construction and Building Materials》 |2018年第30期|20-26|共7页
  • 作者

    Wan Huiwen; Hu Yong; Liu Gang; Qu Yuan;

  • 作者单位

    Wuhan Univ Technol, State Key Lab Silicate Mat Architectures, Wuhan 430070, Hubei, Peoples R China;

    Wuhan Univ Technol, Sch Mat Sci & Engn, Wuhan 430070, Hubei, Peoples R China;

    Wuhan Univ Technol, State Key Lab Silicate Mat Architectures, Wuhan 430070, Hubei, Peoples R China;

    Wuhan Univ Technol, Sch Mat Sci & Engn, Wuhan 430070, Hubei, 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

    Stone-sawing mud; Autoclaved aerated concrete; Pore structure; Hydration;

    机译：切石泥;高压灭菌加气混凝土;孔结构;水化;

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