Effects of Recycled Steel and Polymer Fibres on Explosive Fire Spalling of Concrete
Effects of Recycled Steel and Polymer Fibres on Explosive Fire Spalling of Concrete
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DOI：
10.1007/s10694-019-00817-9
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发表时间：
2019-09-01
期刊：
影响因子：
3.4
通讯作者：
Burgess, Ian
中科院分区：
文献类型：
--
作者：
Figueiredo, Fabio P.;Huang, Shan-Shan;Burgess, Ian
现代高性能混凝土越来越多地被用于隧道和其他重要基础设施中，容易受到爆炸火灾引起的剥落。为了防止火灾剥落，现代规范建议在混凝土混合料中使用少量的聚丙烯纤维(例如，欧洲规范建议的2公斤/米(3))。本文介绍了从废旧轮胎中提取的清洁再生纤维对混凝土爆炸火灾剥落的影响的试验研究。本文介绍了24个剥落试验，表明再生轮胎聚合物纤维在剂量等于或大于2 kg/m(3)时，可能有助于防止火灾剥落。回收的轮胎钢纤维还显示出防止火灾剥落破坏的潜力，通过将剥落的混凝土附着在受热表面，从而保护主要的钢筋。这些纤维的使用可能导致安全和可持续的火灾剥落缓解解决方案。
Modern high-performance concrete, increasingly used in tunnels and other important infrastructure, is susceptible to explosive fire-induced spalling. To prevent fire spalling, modern codes recommend the use of small quantities (e.g. 2 kg/m(3) as recommended by the Eurocodes) of polypropylene fibres in the concrete mix. This paper presents an experimental study investigating, the effect of cleaned recycled fibres extracted from end-of-life tyres on the explosive fire-induced spalling of concrete. This paper presents 24 spalling tests, indicating that recycled tyre polymer fibres, at dosages equal to or larger than 2 kg/m(3), might help prevent fire spalling. Recycled tyre steel fibres also show the potential of preventing fire spalling damage by keeping spalled concrete attached to the heated surface, thus protecting the main steel reinforcement. The use of these fibres might lead to safe and sustainable fire spalling mitigation solutions.