PREDICTION OF DIFFUSIVITY FOR FROST-DAMAGED CONCRETE BY THE MESOSCOPIC TRUSS NETWORK MODEL

摘要：

Cracking and the porosity increase of concrete due to freeze-thaw cycling can forminterconnecting flow channels for ingress of aggressive agents dissolved in water like chlorideand sulfate ions. This process will accelerate the deterioration of concrete structures. In thispaper,the mesoscopic truss network model,is developed to perform the chloride diffusion indamaged concrete. In the model,concrete is treated as a three-phase composite,consisting ofmortar,coarse aggregates and the transition zone between them. The damage of concreteinduced by frost attack is divided into two parts: one is the formation of cracks on theinterface between coarse aggregates and mortar,and the other is the porosity increase ofmortar. The proposed method satisfactorily simulates the chloride diffusion process in a frost-damaged concrete based on some experimental observations. The predicted result is in a goodagreement with test data.

关键词： chloride diffusivity freeze-thaw cycling mesoscopic truss network model

作者: Licheng Wang Tamon Ueda Shingo Honda

作者单位: Management Bureau of Qiantang River,Hangzhou,310016,PR China Division of Built Environment,Hokkaido University,Japan

会议类型: 国际会议

会议名称: The International Conference on Durability of Concrete Structures(2008年混凝土结构耐久性国际学术会议)

会议地点: 杭州

会议语种:英文

页码: 267-273

在线出版日期: 2008-11-01（万方平台首次上网日期，不代表论文的发表时间）