第八讲　高温下混凝土的力学性质冯乃谦高温条件下混凝土的内部结构，由于加热温度而明显不同，力学性质也发生变化。影响高温条件下混凝土性质的主要原因：①发生微观温度应力，这种应力的发生与加热的温度无关，在骨料界面附近形成微小裂纹；②混凝土中的脱水现象，因加... Lecture 8 Mechanical Properties of Concrete at High Temperature Feng Naiqian The internal structure of concrete under high temperature conditions is significantly different due to the heating temperature, and the mechanical properties also change. The main reasons affect the properties of concrete under high temperature conditions: 1 the occurrence of microscopic temperature stress, the occurrence of this stress has nothing to do with the temperature of the heating, the formation of micro-cracks near the interface of the aggregate; 2 dehydration in concrete, due to plus...