摘要
研究了荷载和冻融循环双重损伤因子同时作用下高性能混凝土（ＨＰＣ） 的损伤规律．试验结果表明，在不同应力比的荷载作用下，高性能混凝土的抗冻性能随应力比的提高而下降．掺入钢纤维、引气或两者复合之后的高性能混凝土抵抗双因子损伤能力大大提高，抗冻性显著改善．实验结果还表明，在冻融与荷载双重损伤因子共同作用下的混凝土损伤程度远大于两种因子分别单独作用下损伤程度的简单叠加；引气钢纤维高性能混凝土抑制双因子作用下损伤的能力比单掺钢纤维或单引气的高性能混凝土又有进一步的提高．
In this paper, the damage behavior of high performance concrete (HPC) due to the combined action of freezing thawing cycles and loading was investigated. Results indicate that the frost resistance of HPC decreases with the increase of stress ratio, especially for HPC without air entraining agent. The resistant to the combined action for HPC is significantly improved when steel fiber, air entraining agent or combination of them are added, and the restraint ability from the damage of HPC with steel fiber and air entraining agent together is higher than that of HPC with steel fiber or air entraining agent alone. Moreover, the damages due to the combined action is much larger than the sum of damages due to the separate action of both factors.
出处
《建筑材料学报》
EI
CAS
CSCD
1999年第4期359-364,共6页
Journal of Building Materials
基金
国家自然科学基金
关键词
高性能
混凝土
冻融循环
应力比
损伤
high performance concrete
freezing thawing cycles
stress ratio
damage
air entrainment
steel fiber
composite
durability
