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Effectiveness of the traditional parameters for specifying carbonation resistance

机译：传统参数对指定抗碳化性的有效性

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摘要

This paper presents data on carbonation measurements taken from a range of test specimens stored outside but protected from rainfall. A wide range of concretes were tested that were representative of UK ready-mixed concrete production at ages of between 3-5 and 5-7 years. None of the traditional specification parameters (maximum water/ cement (w/c) ratio, minimum cement content and compressive strength class) on their own or in combination give a consistent carbonation resistance. When compared at a fixed w/c ratio of 0-55, there was no clear influence of cement content on carbonation resistance. The measured carbonation depths of the Portland cement concretes were too low to show any influence of aggregate type. When extrapolated to 35 years, in a conservative manner, the data provide no grounds for concern with the BS 8500-1 recommendations with respect to carbonation resistance. There is some indication that the BS 8500-1 recommendations with respect to CEM I concretes may be too conservative. The predicted performance of concrete containing 40% or more fly ash indicates that the particular recommendations set out in BS 8500-1:2006 are justified.
机译：本文介绍了从一系列存储在外部但不受雨淋影响的试样中获得的碳化测量数​​据。测试了范围广泛的混凝土，这些混凝土代表了英国3-5至5-7岁之间的预拌混凝土生产。传统规格参数（最大水/水泥（w / c）比，最小水泥含量和抗压强度等级）本身或结合使用都不具有一致的抗碳化性。当以固定的w / c比0-55进行比较时，水泥含量对抗碳化性没有明显影响。测得的波特兰水泥混凝土的碳化深度太低，无法显示集料类型的任何影响。当以保守的方式推断到35年时，该数据没有理由担心有关抗碳化性的BS 8500-1建议。有迹象表明，BS 8500-1关于CEM I混凝土的建议可能过于保守。包含40％或更多粉煤灰的混凝土的预期性能表明，BS 8500-1：2006中提出的特定建议是合理的。

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  • 来源
    《Magazine of Concrete Research》 |2012年第6期|p.487-497|共11页
  • 作者

    Thomas A. Harrison; Roderick Jones; Siva Kandasami; Gaurav Khanna;

  • 作者单位

    University of Dundee, Dundee, UK;

    School of Engineering, Physics and Mathematics, University of Dundee, Dundee, UK;

    Independent Structural Consultant, Coimbatore, India;

    University of Dundee, Dundee, UK;

  • 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
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