REUSED TYRE POLYMER FIBRE FOR FIRE-SPALLING MITIGATION
REUSED TYRE POLYMER FIBRE FOR FIRE-SPALLING MITIGATION
复制标题
再生轮胎聚合物纤维可减少火灾剥落
DOI：
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
I. Burgess
中科院分区：
文献类型：
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作者：
Shan;Harris Angelakopoulos;K. Pilakoutas;I. Burgess
在混凝土中使用聚丙烯纤维(PPF)主要是为了减少塑性收缩裂缝，但也是为了防止混凝土在火灾中爆炸剥落。仅在欧盟，估计每年就使用7.5万吨初榨PPF。与此同时，估计有63,000吨聚合物纤维从报废轮胎中回收，这些轮胎结块，污染严重，无法找到任何替代用途；目前，这些纤维主要通过焚烧处理。作者已经开始了一项关于在新混凝土中重复使用轮胎聚合物纤维以减轻火灾引起的剥落的可行性的研究。如果成功，这将允许用同等或更高性能的重复使用产品取代目前使用的原始PPF。本文进行了初步的实验研究。对高强混凝土立方体/板进行了热机械加载试验。这项研究显示了有希望的结果；与普通混凝土相比，使用轮胎聚合物纤维的样品显示出更低的剥落脆弱性。
Polypropylene fibres (PPF) are used in concrete principally to reduce plastic shrinkage cracking, but also to prevent explosive spalling of concrete exposed to fire. In the EU alone, an estimated 75,000 tonnes of virgin PPF are used each year. At the same time an estimated 63,000 tonnes of polymer fibres are recovered from end-of-life tyres, which are agglomerated and too contaminated with rubber to find any alternative use; currently these are mainly disposed of by incineration. The authors have initiated a study on the feasibility of reusing tyre polymer fibres in fresh concrete to mitigate fire-induced spalling. If successful, this will permit replacement of the virgin PPF currently used with a reused product of equal or superior performance. A preliminary experimental investigation is presented in this paper. High-strength concrete cubes/slabs have been tested under thermo-mechanical loading. This study has shown promising results; the specimens with the tyre polymer fibres have shown lower vulnerability to spalling than those of plain concrete.