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Proportioning and characterization of Portland cement-based ultra-lightweight foam concretes

机译：波特兰水泥基超轻质泡沫混凝土的配比与表征

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摘要

Due to desirable thermal insulation properties, superior fire-resistant and higher durability, ultra-light-weight foam concretes are recommended to achieve energy efficiency in buildings. Generally, aluminate cement, sulphoaluminate cement and other quick hardening cementitious materials are used to control the stability of air-voids in foam concretes. These special cementitious materials are relatively expensive and not universally available, retarding the application and popularization of foam concretes. In the present study, the proportioning and properties of Portland cement-based ultra-lightweight foam concrete were investigated. The results show that ultra-lightweight foam concretes with apparent density of 100-300 kg/m(3) can be prepared using Portland cement, fly ash, hydrogen peroxide and chemical admixtures. Collapse and air-voids escape can be avoided by adding thickening agent and foam stabilizing emulsion into foam concretes. Most of pores in ultra-lightweight foam concretes were non-connected pores with size of 2.0-4.0 mm, resulting in a lower thermal conductivity, desirable compressive and tensile strengths. (C) 2015 Elsevier Ltd. All rights reserved.
机译：由于理想的隔热性能，优异的耐火性和更高的耐用性，建议使用超轻型泡沫混凝土来实现建筑物的能源效率。通常，铝酸盐水泥，硫铝酸盐水泥和其他速凝水泥材料用于控制泡沫混凝土中气孔的稳定性。这些特殊的水泥材料相对昂贵且不能普遍获得，从而阻碍了泡沫混凝土的应用和普及。在本研究中，研究了波特兰水泥基超轻质泡沫混凝土的比例和性能。结果表明，可以使用波特兰水泥，粉煤灰，过氧化氢和化学外加剂制备表观密度为100-300 kg / m（3）的超轻泡沫混凝土。通过在泡沫混凝土中添加增稠剂和泡沫稳定乳液，可以避免坍塌和气泡逸出。超轻质泡沫混凝土中的大多数孔都是大小为2.0-4.0 mm的非连通孔，从而导致较低的导热率，所需的压缩强度和拉伸强度。 （C）2015 Elsevier Ltd.保留所有权利。

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  • 来源
    《Construction and Building Materials》 |2015年第15期|390-396|共7页
  • 作者

    Huang Zhaoming; Zhang Tongsheng; Wen Ziyun;

  • 作者单位

    S China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510640, Guangdong, Peoples R China|Zhongshan Chengsheng Bldg Mat R&D Co Ltd, Zhongshan 528447, Peoples R China|Zhongshan Architectural Design Inst Co Ltd, Zhongshan 528403, Peoples R China;

    S China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510640, Guangdong, Peoples R China;

    S China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510640, Guangdong, 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

    Portland cement; Foam concrete; Ultra-light weight; Hydrogen peroxide; Thermal conductivity;

    机译：硅酸盐水泥;泡沫混凝土;超轻;双氧水;导热系数;

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