轻质水泥基结构火灾经历温度的红外热像检测实验

Fire experience temperature detected experiment of ecological cement-based composite material

以轻质水泥基结构为研究对象,利用红外热像和多通路温度传感器检测材料在火灾中经历的最高温度。在红外热像温升随时间的变化关系的基础上,建立了轻质水泥基材料的红外热像平均温升与其受火温度及强度损失的回归方程,得到该结构的火灾损伤的检测和评估模型。结果表明:(1)作为含有气泡状有机质的新型建筑材料,其高温作用后的红外热像温升明显较混凝土结构高;(2)材料的受火温度和材料强度损失的检测模型分别为:T=472.734 458x-587.909 642和f(T)/f0=110.662 138-0.154 507x;(3)通过红外热像检测模型,可评估火灾后的轻质水泥基材料的损伤程度,获得结构破坏前兆信息。

Ecological lightweight cement-based structure was studied, using infrared thermal imaging and inclusions burst the maximum temperature of the material experienced by the fire was detected. Based on Infrared thermal imaging in the variation of temperature over time, average temperature rise of Infrared thermal imaging with fire temperature and intensity loss by the regression equation was established, the structure of the fire damage detection and evaluation model was found. The resuits showed that： （1） As a new type of building materials with bubble-like organic matter, the infrared thermal imaging temperature significantly higher than the concrete structure , after high temperature ; （2） burst temperature and Infrared thermal imaging test was basically the same; （3） through the infrared thermal image detection model, the damage of ecological lightweight cement-based composite material after fire could be evaluated, precursor information of broken ring structure would be get.