Revealing the temperature history in concrete after fire exposure by microscopic analysis
Revealing the temperature history in concrete after fire exposure by microscopic analysis
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DOI：
10.1016/j.cemconres.2009.08.017
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发表时间：
2009-12-01
影响因子：
11.4
通讯作者：
Taerwe, L.
中科院分区：
文献类型：
--
作者：
Annerel, E.;Taerwe, L.
混凝土结构在大多数情况下在火灾中表现得很好，火灾后通常可以修复或加固到一定程度。这可能会带来重要的经济效益，因为可以避免拆除和重建的成本，并可以更快地重新使用建筑物。本文研究了三种确定混凝土结构在火灾中所达到的最高温度的方法。温度分布的知识对于评估混凝土结构的整体损伤是必要的。首先，用扫描电子显微镜(SEM)研究了受热混凝土的物理化学变化。其次，讨论了在偏光显微镜和荧光显微镜(PFM)下的可见特征。第三，分析了加热对骨料颜色的影响。(C)2009爱思唯尔有限公司。保留所有权利。
Concrete structures behave in most cases very well during a fire, after which it is often possible to repair or strengthen the structure to a certain level. This could result in important economic benefits, as costs for demolition and rebuilding can be avoided and the building can be reused faster. In this paper three methods for determining the maximum temperature to which a concrete structure was submitted during a fire are studied. Knowledge of the temperature distribution is necessary to assess the overall damage of a concrete structure. First, the physico-chemical transformations of heated concrete are investigated with scanning electron microscopy (SEM). Secondly, the features visible under the polarising and fluorescent microscope (PFM) are discussed. And third, the influence of heat on the colour of the aggregates is analysed. (C) 2009 Elsevier Ltd. All rights reserved.