摘要
以实际海洋工程结构为依托,通过实海暴露试验和实验室性能检测,对服役时间、裂缝宽度、保护层厚度和Cl^-浓度影响钢筋混凝土结构的腐蚀劣化进行了研究。结果表明,混凝土初期氯离子渗透速度较快、后期明显减小;裂缝可作为氯离子渗透的有效途径;而保护层厚度越大,外界腐蚀性介质侵入越困难;氯离子可有效增强混凝土孔隙液的导电能力,导致钢筋腐蚀;且随氯离子浓度增大,钢筋自腐蚀电流密度增大并逐渐趋于稳定。
Abstract： Relying on the actual structure of ocean engineering, based on exposure test in the sea and laboratory performance test, the paper studies the influence of service time, crack width, cover thickness and CI- concentration on the corrosion of reinforced concrete structure. The result shows that C1- permeates faster in concrete at early stage and then slows down later; cracks are effective ways of C1- penetration; external corrosive material intrusion becomes more difficult with cover thickness increases; C1- can enhance the conductivity of concrete pore solution effectively, resulting in corrosion of steel; the corrosion current of steel increases and stabilizes gradually with C1- concentration increases.
出处
《浙江水利科技》
2017年第3期53-57,共5页
Zhejiang Hydrotechnics
基金
浙江省重大科技专项重点项目(2010C01014)
舟山市海洋类项目(092008)
关键词
东海环境
服役时间
裂缝宽度
Cl^-渗透性能
钢筋锈蚀
East China Sea environment
service time
tack width
CI- permeability
reinforcement rustiness
