摘要
对C20,C40混凝土的标准立方体试件,进行了在高温100℃,300℃,500℃,700℃,900℃作用2 h后自然冷却、静置6 h的抗压强度试验以及在400℃和600℃分别持续加热1 h,2 h,3 h,4 h,5 h后自然冷却、静置6 h的抗压强度试验,分析讨论了不同的高温作用后混凝土材料劣化的机理以及对抗压强度的影响,探讨了抗压强度变化的规律。
Two normal strength concretes, with 28-day compressive strengths of 29 MPa and 48.2 MPa respectively, were used to compare the effect of high temperatures on two heated methods. The paper describes tests on 150mm these normal strength concretes cubes heated to temperatures at 400~C or 600~C ,and cooled for six hours to determine the effect of varying time from one hour to five hours of exposure on the residual compressive strength of concrete. After being heated to a series of maximum temperatures at 100,300, 500,700 and 900~C, and maintained for 2 hour, their compressive strengths were determined. The effect of two kinds of heating regime on residual compressive strength after heated the normal concrete are discussed and the factors of influencing the strength of concrete during the different heating regime are analyzed.
出处
《四川建筑科学研究》
北大核心
2007年第5期118-121,共4页
Sichuan Building Science
关键词
温度
破坏机理
混凝土
抗压强度
temperature
damage mechanism
concrete
compressive strength
