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以秸秆纤维轻质墙体为研究对象,分析其结构和组成及其对材料高温性能的影响;通过TG-FTIR分析,研究了高温作用下的秸秆纤维墙体材料的物理化学变化过程。在上述基础上,针对该种新型建筑材料进行了烧失量实验,利用DRS2.6数据回归分析软件,建立了火灾温度-烧失量的一元回归模型。同时,以200 mm厚的秸秆纤维外墙保温板为例,在ISO9705标准火灾实验间对温度-烧失量回归模型进行了校验。结果表明:回归方程准确可信,可用于火灾后各部位的温度变化情况、起火原因的认定和灾后强度评估。
The structure and composition of straw fiber lightweight wall were analyzed, and its effect on the high temperature performance of the material was analyzed. The physicochemical changes of straw fiber wall material under high temperature were studied by TG-FTIR analysis. On the basis of the above, the experiment of burning loss for the new type of building materials was carried out. Using DRS2.6 data regression analysis software, a one-dimensional regression model of fire temperature-loss was established. Taking the 200 mm thick straw fiber exterior wall heat insulation board as an example, the temperature-loss regression model was calibrated in the ISO9705 standard fire experiment. The results show that the regression equation is accurate and credible, and it can be used for the temperature change of various parts after fire, the identification of the cause of fire and the assessment of post-disaster intensity.