摘要
研究高温作用下高性能混凝土材料的力学性能,有助于评估高温作用对混凝土长期耐久性的影响。开展一系列高温作用下高性能混凝土的力学性能试验,探讨了不同温度和保温时间对混凝土抗压强度和劈裂抗拉强度的影响。研究结果表明,在高温环境下,各类混凝土的抗压强度和劈裂抗拉强度均呈下降趋势,且当保温时间延长时,性能退化现象更为明显。特别是对于抗压强度和劈裂抗拉强度,随着保温时间的增加,混凝土内部微观结构损伤加剧,其下降幅度更大。
The study of the mechanical properties of high-performance concrete materials under the action of high temperatures helps to assess the impact of high temperature on the long-term durability of concrete.A series of mechanical property tests of high-performance concrete under the action of high temperature were carried out to investigate the effects of different temperatures and holding times on the compressive strength and splitting tensile strength of concrete.The research results show that the compressive strength and splitting tensile strength of all types of concrete show a decreasing trend under high temperature environment,and the performance degradation phenomenon is more obvious when the heat preservation time is prolonged.Especially for compressive strength and splitting tensile strength,with the increase of holding time,the internal microstructure damage of concrete intensifies,and its decline is greater.
作者
龚毅
张巍
GONG Yi;ZHANG Wei(Hunan Expressway Group Co.,Ltd.)
出处
《广东建材》
2025年第5期17-20,共4页
Guangdong Building Materials
关键词
高温
混凝土
抗压强度
粉煤灰/硅灰
High temperature
Concrete
Compressive strength
Fly ash/silica fume
作者简介
龚毅(1979-),男,高级工程师,从事高速公路建设和管理研究.
