Formation mechanism and multi-factor model for surface chloride concentration of concrete in marine atmosphere zone
Yang Lufeng1,2,3 Cai Rong1,2,3,4 Yu Bo1,2,3
1. School of Civil Engineering & Architecture, Guangxi University, Nanning 530004, China;
2. Key Laboratory of Disaster Prevention and Structural Safety of the Ministry of Education, Guangxi University, Nanning 530004, China;
3. Guangxi Key Laboratory of Disaster Prevention and Engineering Safety,Guangxi University, Nanning 530004, China;
4. Guangxi University of Finance and Economics, Nanning 530003, China
Abstract：Transport mechanism and influential factors of chloride ion in two different stages of atmospheric transport and concrete transport were explored and an improved multi-factor model for surface chloride concentration of concrete structure exposed to marine atmosphere zone was developed. Firstly, the main influential factors on surface chloride concentration were investigated, and the influential laws of various factors, including marine environmental conditions, concrete material properties and exposure time, on surface chloride concentration were explored. Taking into consideration the influences of various important factors such as distance from the sea, wind speed, water-to-binder ratio, binder types and exposure time, an improved multi-factor model for surface chloride concentration of concrete structure exposed to marine atmosphere zone was developed based on marine field data of multiple locations including European, North American, South American and Asian data and two-level multiple nonlinear regression analysis. Finally, the accuracy and applicability of the proposed model were demonstrated by comparing with the predicted values of existing empirical models and experimental data of surface chloride concentration under natural exposure conditions.
杨绿峰 蔡荣 余波. 海洋大气区混凝土表面氯离子浓度的形成机理和多因素模型[J]. 土木工程学报, 2017, 50(12): 46-55.
Yang Lufeng Cai Rong Yu Bo. Formation mechanism and multi-factor model for surface chloride concentration of concrete in marine atmosphere zone. 土木工程学报, 2017, 50(12): 46-55.
