温度对海工混凝土抗氯离子侵蚀性能的影响及寿命预测  

Influence of Temperature on Marine Concrete Anti-chloride Corrosion Ability and Analysis on Life Forecast

作　　者：徐文冰[1,2,3] 孙策 李进辉[1,2,3] 秦明强[1,2,3] 占文[1,2,3] 

机构地区：[1]中交武汉港湾工程设计研究院有限公司,武汉市430040 [2]长大桥梁建设施工技术交通行业重点实验室,武汉市430040 [3]海工结构新材料及维护加固技术湖北省重点实验室,武汉市430040 [4]深圳高速公路股份有限公司,深圳市518033

出　　处：《公路》2014年第10期50-54,共5页Highway

摘　　要：结合炎热气候条件下氯盐对混凝土结构侵蚀作用的机理,研究了水饱和度对混凝土氯离子扩散系数的影响程度,利用线性极化法探究了温度对钢筋锈蚀速率的影响规律,并分析了温度对海工混凝土寿命的影响。研究表明,较高的环境温度对混凝土氯离子扩散的影响显著,明显加快了氯离子在混凝土内部的渗透过程和加剧了钢筋的锈蚀速率,炎热气候对混凝土结构的抗氯盐侵蚀和耐久性造成不利的影响。According to the eroding mechanism of chloride on concrete structure in hot climate environment, the impact of water saturation degree on chloride diffusing coefficient of concrete is investigated in this paper, and the effecting rules of the temperature on rusting rate of rebar are researched by linear polarization method. The influences of temperature on life of marine concrete are also analyzed. The research results show that higher environmental temperature has greater influence on chloride diffusing ability of marine concrete, which obviously accelerates the diffusing rate of chloride towards concrete interior, and aggravates the eroding rate of rebar. The hot climate environment causes the disadvantages to anti-chloride corrosion ability and durability of marine concrete.

关 键 词：海工混凝土 抗氯盐侵蚀 性能 影响 寿命预测 

分 类 号：U441.5[建筑科学—桥梁与隧道工程]