所属单位：航空学院

发表刊物：OCEAN ENGINEERING

关键字：Tropical atoll environment Ordinary Portland-cement concrete Coral aggregate concrete Durability Chloride diffusion

摘要：A literature investigation and field surveys were made to explore the durability to destruction of Ordinary Portland cement Concrete (OPC) and Coral Aggregate Concrete (CAC) structures in a tropical atoll environment. The surface free Cl- concentrations (C-s) and apparent chloride diffusion coefficients (D-a) were calculated and the calculation method of D-a in a one-dimensional half-infinite-body concrete structure was explored. The results show that the complex and severe environment of tropical atolls corrodes concrete structures badly and that the reinforcement corrosion rate is high. For a concrete structure in a tropical atoll, C-s of OPC is generally smaller than that of CAC. At the same time, the D-a of concrete calculated by the least squares method is the most reliable according to Fick's second law of diffusion. The calculated results demonstrate that the value of D-a is generally smaller in OPC than in CAC. Smaller water-to-binder ratios and higher strengths cause decreases in D-a for CAC. When OPC is not available in tropical atoll projects, the water-to-binder ratio should be decreased and the strength should be enhanced in CAC, which should improve the durability of the concrete effectively and decrease the C-s and D-a of the concrete structure.

ISSN号：0029-8018

是否译文：否

发表时间：2017-05-01

合写作者：达波,麻海燕,Zhu, Haiwei,Yu, Qiang,Ye, Haimin,Jing, Xianshuang

第一作者：余红发

通讯作者：余红发