摘要
模拟火灾情况,分别对不同受热温度、自然冷却条件下的混凝土样品进行扫描电子显微镜分析。发现自然冷却条件下,混凝土受热温度不同时,微观形貌成一定的变化规律。C-S-H凝胶结构和骨料与水泥浆体界面处都会随温度发生特征变化。根据这一变化规律可鉴定自然冷却条件下混凝土受热温度,有助于准确认定起火部位。
Simulating the fire circumstance,this experiment used the SEM to analyse the microstructure of concretes heated at different temperatures and cooled naturally.It was found that some microstructure followed certain patterns with concretes heated at different temperatures,which were cooled naturally.There are some characteristic changes of C-S-H and the interface between aggregate and cement with the altering of temperatures.These patterns of changes can be used to check the temperature of concretes suffered in fire in order to trace the original place of fire.
出处
《武警学院学报》
2010年第2期19-21,共3页
Journal of the Armed Police Academy
关键词
混凝土
自然冷却
受热温度
微观形貌
起火部位
concrete
natural cooling
heated temperature
microstructure traces
the original place of fire
