粉煤灰混凝土冻融破坏机理研究  

Study of Frost Resistance Mechanism of Fly Ash Concrete

作　　者：潘钢华[1] 秦鸿根[1] 孙伟[1] 张金山[1] 王修田[1] 李松泉 黄卫华 姜阳 

机构地区：[1]东南大学材料科学与工程系,江苏南京210096 [2]南京长江第二大桥建设指挥部,江苏南京210028

出　　处：《建筑材料学报》2002年第1期37-41,共5页Journal of Building Materials

基　　金：南京长江第二大桥建设指挥部资助项目

摘　　要：研究了不同粉煤灰掺量、冻融方式和混凝土组成材料的变化对混凝土在冻融循环中损伤程度的影响 ,证明了C3 0 ,C50掺粉煤灰混凝土的冻融破坏机理主要是结冰压力破坏 ,从而为粉煤灰混凝土抗冻性和耐久性的改善措施提供了依据 .There is some disagreement on the mechanism and test results of concrete resistance to freeze/thaw action. The factors influencing damage of concrete were tested with different fly ash dosages, manner of freeze/thaw action and constitution of concrete. The results show that the mechanism of failure of concrete with strength grade 50 MPa under freeze/thaw cycle is mainly icing pressure. The research conclusions can be used as a base in designing of concrete with fly ash used in some important concrete engineering like Nanjing Second Yangtze River Bridge.

关 键 词：冻融循环 破坏机理 粉煤灰混凝土 

分 类 号：TU528.2[建筑科学—建筑技术科学]