U.S.-Mexico Cooperative Research: Chloride Diffusion and Corrosion Effects on Reinforcing Steel in Concrete

9504108 Sages这个美国-墨西哥奖项将支持南佛罗里达大学(USF)的Alberto Sago教授和墨西哥尤卡坦梅里达的Avanzados研究中心(CINVESTAV)的Pedro Castro Borges教授之间的研究合作，致力于混凝土中钢筋的腐蚀问题。更具体地说，研究人员打算确定钢筋混凝土结构碳化的原因和机理，研究碳化和氯离子污染对钢筋腐蚀的综合影响，并探讨氯离子在混凝土中的扩散机理。该方法将包括最新文献审查、墨西哥湾两侧建筑物的混凝土岩芯取样、对这些岩芯进行检查以定量确定氯离子的进入速度，以及对已经就位的现场测试样本进行检查。这项工作将受益于美国联邦航空局现有的关于混凝土碳化和混凝土结构寿命预测的相关研究计划，以及CINVESTAV关于混凝土中钢筋腐蚀的调查。这一奖项得到了美国国家科学基金会土木工程和机械结构部的部分支持。***

9504108 Sagues This U.S.-Mexico award will support a research collaboration between Prof. Alberto Sagues of the University of South Florida (USF), and Prof. Pedro Castro Borges of the Centro de Investigacion y de Estudios Avanzados (CINVESTAV) in Merida, Yucatan, Mexico, to work on corrosion problems of reinforcing steel in concrete. More specifically, the researchers intend to determine the causes and mechanism of carbonation of reinforced concrete structures, study the combined effects of carbonation and chloride ion contamination on corrosion of reinforcing steel, and investigate the mechanism of diffusion of chloride ions through concrete. The methodology will include a literature review update, concrete core sampling of structures on both sides of the Gulf of Mexico, examination of those cores to quantitatively determine rates of chloride ingress, and examination of field test specimens already in place. The work will benefit from existing related research programs on carbonation of concrete and lifetime prediction of concrete structures at USF, and investigations on corrosion of steel in concrete at CINVESTAV. This award is partly supported by the Division of Civil and Mechanical Structures of NSF. ***