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用于纤维增强混凝土的聚合物纤维的性能:最新评论

梅萨 姆·, 迈克 尔·, 马齐 尔·, 贝鲁 兹·
美国土木

摘要


长期以来,混凝土行业一直在胶凝材料中添加分立纤维,以补偿其(相对)低拉伸强度并控制可能的裂缝。
过去的广泛研究已经确定了混合和利用离散纤维的有效策略,但随着纤维材料性能的进步,用它们制成的胶凝复合
材料的性能也会提高。因此,不仅要了解各种纤维类型对混凝土各种性能的影响,还要了解改变纤维类型如何影响
这些性能,这一点至关重要。为此,本研究详细回顾了与纤维增强混凝土(FRC)应用考虑的不同纤维类型相关的
相关文献,重点关注其功能,局限性,常见用途和最新进展。为了实现这一目标,本文首先研究了影响胶凝复合材
料在新鲜和硬化状态下特性的主要纤维性能,然后将研究扩展到所鉴定的纤维在碱性环境中的稳定性以及它们如何
与胶凝基质结合。另外,本文还探讨了纤维类型对 FRC的加工性、峰前和峰后机械性能、收缩率和极端耐温性的影
响。在提供整体比较时,本研究的结果为正确选择和利用混凝土中纤维的益处提供了全面的指导,从而促进了各种
FRC产品的明智设计。

关键词


纤维增强混凝土;聚合物纤维;新鲜和硬化的特性

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参考


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DOI: http://dx.doi.org/10.12361/2661-3743-04-02-81286

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