Carbonation of concrete in relation to CO2 permeability and degradation of coatings
Carbonation of concrete in relation to CO2 permeability and degradation of coatings
复制标题
DOI：
10.1016/j.conbuildmat.2007.07.032
复制
发表时间：
2008-11-01
影响因子：
7.4
通讯作者：
Park, D. C.
中科院分区：
文献类型：
--
作者：
Park, D. C.
针对混凝土碳化是引起混凝土建筑问题的原因，我们建立了扩散-反应碳化模型，用有限元法估计碳化的深度。利用差压法研究二氧化碳的渗透，测量二氧化碳在不同涂层中的扩散系数和溶解度系数，得到该模型分析的输入数据。通过与涂覆混凝土试件油加速碳化实验结果的比较，验证了模型的有效性。二氧化碳在各种涂层材料中的扩散系数依次增大：聚氯乙烯、聚氨酯、环氧树脂、丙烯酸。还研究了涂层降解和涂层数量的影响。(C) 2007 Elsevier Ltd.版权所有。
In relation to concrete carbonation as a cause of problems in concrete buildings, we have constructed a diffusion-reaction carbonation model using the finite element method to estimate the depth of carbonation. Input data for analysis using this model were obtained by measuring both the diffusion coefficient and the solubility coefficient of carbon dioxide in various coatings by studying the permeation of carbon dioxide using a differential pressure method. The validity of the model has been verified by comparing results obtained from this model with experiments oil accelerated carbonation using coated concrete specimens. The diffusion coefficient of carbon dioxide in various coating materials increased in the following order: polyvinyl chloride, polyurethane, epoxy, and acrylic. The effects of the degradation of coatings and of the number of coatings have also been examined. (C) 2007 Elsevier Ltd. All rights reserved.