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

9504108 sgues美国-墨西哥奖将支持南佛罗里达大学（USF）的Alberto sgues教授和墨西哥尤卡坦州梅里达市Avanzados研究中心（CINVESTAV）的Pedro Castro Borges教授的研究合作，研究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联合影响，以及氯离子在混凝土中的扩散机制。该方法将包括文献综述更新、墨西哥湾两侧结构的混凝土岩心取样、对这些岩心进行检查以定量确定氯化物进入率，以及对已经到位的现场测试样品进行检查。这项工作将受益于USF现有的混凝土碳化和混凝土结构寿命预测的相关研究项目，以及CINVESTAV对混凝土中钢的腐蚀的研究。该奖项由美国国家科学基金会土木与机械结构部提供部分资助。＊＊＊

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. ***