Effect of Carbonation and Drying-Wetting Cycles on Chloride Diffusion Behavior of Coral Aggregate Seawater Concrete

作     者：DA Bo LI Yipeng YU Hongfa MA Haiyan CHEN Haoyu DOU Xuemei WU Zhangyu DA Bo;LI Yipeng;YU Hongfa;MA Haiyan;CHEN Haoyu;DOU Xuemei;WU Zhangyu

作者机构：College of HarbourCoastal and Offshore EngineeringHohai UniversityNanjing 210098China Department of Civil and Airport EngineeringNanjing University of Aeronautics and AstronauticsNanjing 210016China Key Laboratory of Coastal Disaster and Defence of Ministry of EducationHohai UniversityNanjing 210098China Nantong Institute of Marine and Offshore EngineeringHohai UniversityNantong 226300China CCCC Infrastructure Maintenance Group Company LimitedBeijing 100010China 

出 版 物：《Journal of Ocean University of China》 (中国海洋大学学报（英文版）)

年 卷 期：2022年第21卷第1期

页      面：113-123页

核心收录：

学科分类：081505[工学-港口、海岸及近海工程] 08[工学] 081304[工学-建筑技术科学] 0815[工学-水利工程] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0824[工学-船舶与海洋工程] 0813[工学-建筑学] 0814[工学-土木工程] 082401[工学-船舶与海洋结构物设计制造] 

基　　金：sup-ports from the National Natural Science Foundation of China(Nos.11832013 and 51878350) the Fundamental Research Funds for the Central Universities(No.B210202023) the Young Scientific and Technological Talents to Support Project of Jiangsu Association for Science and Technology(No.027) the Water Conservancy Science and Technology Project of Jiangsu Province(No.2020017) the Postdoctoral Research Funding Program of Ji-angsu Province(No.2021K133B) the Ningbo Science and Technology Innovation Project(No.2020Z040) the Nantong Science and Technology Plan Project(No.JC 2020120) the Open Research Fund of Changjiang River Research Institute of Changjiang Water Resources Com-mittee(No.CKWV2021879/KY) 

主　　题：coral aggregate seawater concrete chloride diffusion seawater immersion drying-wetting cycles carbonation and drying-wetting cycles 

摘      要：Based on seawater immersion,drying-wetting cycles,carbonation and drying-wetting cycles for coral aggregate sea-water concrete(CASC)with different strength grades,the effect of carbonation and drying-wetting cycles on chloride diffusion be-havior of CASC is *** results show that the free surface chloride concentration(Cs),free chloride diffusion coefficient(Df)and time-dependent index(m)of CASC in the drying-wetting cycles is obviously higher than that in seawater *** Df and m of CASC of carbonation and drying-wetting cycles is higher than that in the drying-wetting *** increases the Df and m of CASC,which is against CASC to resist chloride *** corrosion possibility of CASC structures in different ex-posed areas is as follows:splash zone(carbonation and drying-wetting cycles)tidal zone(drying-wetting cycles)underwater zone(seawater immersion).Besides,the chloride diffusion rate of C65-CASC is 17.8%-63.4%higher than that of C65-ordinary aggre-gate concrete(OAC)in seawater immersion(underwater zone).Therefore,anti-corrosion measures should be adopted to improve the service life of CASC structure in the oceanic environment.