高温条件下混凝土的力学性能与抗爆裂

MECHANICAL AND ANTI-SPALLING PERFORMANCE OF CONCRETE SUBJECTED TO HIGH TEMPERATURES

根据近年来国内外对混凝土高温性能的试验研究,阐述了混凝土在高温下的基本力学性能,包括强度、弹性模量、应力-应变关系;从混凝土的微观结构出发,分析了混凝土在高温下的爆裂及强度损失机理;通过在混凝土中掺加纤维来减少混凝土高温后的强度损失和爆裂,经试验证明是行之有效的方法。

Based on the recent experimental studies,this paper summarized the mechanical behavior of concrete at high temperature,including strength,elastic modulus,stress-strain relation.The mechanism of explosive spalling and strength loss at high temperatures was analyzed from the microstructure of concrete.Fibers can be used in concrete to reduce explosive spalling and mass loss,which was proved a feasible method by experiments.