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Self-compacting concrete: history and current trends

机译:自密实混凝土:历史和当前趋势

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摘要

The ultimate objective of design and construction of reinforced concrete structures is to produce a robust and durable end product. The structural capacity, durability and physical appearance of any structural element are directly associated with the construction quality and the effective interaction between concrete and the embedded reinforcement. A key parameter with a strong influence on concrete-steel interaction is the effectiveness of fresh concrete compaction, which will allow the extraction of entrapped air and the full encasement of reinforcement bars, so that the two materials can act compositely. However, it is recognised that, regardless of design quality and construction planning, compaction remains the Achilles'heel of traditional concrete (TC). Poor compaction is often identified as the major cause of some of the most common defects found in construction, including cold joints and surface imperfections, such as honeycombing and various blemishes (Figure 1), and unfilled cavities, including both surface and hidden voids (Figure 2).
机译:设计和建造钢筋混凝土结构的最终目标是生产出坚固耐用的最终产品。任何结构元件的结构容量,耐久性和物理外观都与建筑质量以及混凝土与埋入式钢筋之间的有效相互作用直接相关。对混凝土与钢之间的相互作用有重要影响的关键参数是新鲜混凝土的压实效果,这将允许排出夹带的空气并完全包裹钢筋,从而使两种材料可以发挥复合作用。但是,已经认识到,无论设计质量和施工计划如何,压实仍然是传统混凝土(TC)的致命弱点。压实不良通常被认为是建筑中一些最常见缺陷的主要原因,包括冷缝和表面缺陷,例如蜂窝状和各种瑕疵(图1),以及未填充的空洞,包括表面和隐藏的空隙(图1)。 2)。

著录项

  • 来源
    《Concrete》 |2017年第5期|13-16|共4页
  • 作者

    Ioannis Sfikas;

  • 作者单位
  • 收录信息 美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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