Durability of concrete structures in marine atmosphere zones - The use of chloride deposition rate on the wet candle as an environmental indicator
Durability of concrete structures in marine atmosphere zones - The use of chloride deposition rate on the wet candle as an environmental indicator
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DOI：
10.1016/j.cemconcomp.2010.03.002
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发表时间：
2010-07-01
影响因子：
10.5
通讯作者：
Padilha, M., Jr.
中科院分区：
文献类型：
--
作者：
Meira, G. R.;Andrade, C.;Padilha, M., Jr.
海洋环境下混凝土结构的耐久性研究由来已久。本文以海洋大气区为研究对象，研究了氯离子在湿烛装置上的沉积及其与混凝土中氯离子累积的关系。三种不同的混合物的混凝土试样暴露在位于四个不同的距离从大海的地方。定期获得氯化物概况，并结合环境数据进行分析。数值外推的结果表明，氯离子沉积速率的湿蜡烛可以用作环境指标，有助于预览混凝土结构的预期使用寿命或建议最小的混凝土保护层厚度所需的使用寿命。在研究区域内，氯盐沉积量从120 mg/m2·d增加到500 mg/m2·d时，混凝土结构的使用寿命降低了30%~ 60%，表明氯盐沉积量作为海洋大气区混凝土结构使用寿命分析的环境指标具有重要作用。(C)2010爱思唯尔有限公司版权所有。
Durability of concrete structures under marine environments has been studied for a long time. This work was focused on marine atmosphere zone and studied the deposition of chlorides on wet candle devices and its relation with chlorides accumulated into concrete. Concrete specimens with three different mixtures were exposed at places located at four different distances from the sea. Periodically, chloride profiles were obtained and analysed taking into account environmental data. Results of numerical extrapolations show that chloride deposition rate on the wet candle can be used as an environmental indicator, helping to preview the expectancy of service life of concrete structures or suggesting minimum concrete cover thicknesses for a required service life. Regarding the studied region, service life decreases between 30% and 60% were observed when changing chloride deposition from 120 mg/m(2) day to 500 mg/m(2) day, which shows that chloride deposition plays an important role as an environmental indicator on service-life analysis of concrete structures in marine atmosphere zone. (C) 2010 Elsevier Ltd. All rights reserved.