Sulfate Attack of Concrete: Transport Kinetics and Damage Mechanisms Examined In Situ by X-ray Methods

混凝土的硫酸盐侵蚀：通过 X 射线方法现场检查传输动力学和损伤机制

• 批准号: 0084824
• 负责人: Kimberly Kurtis
• 金额: $ 27.12万
• 依托单位: Georgia Tech Research Corporation
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-09-15 至 2006-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0084824&HistoricalAwards=false
• 关键词: Sulfate; Attack; Concrete; Transport; Kinetics

0084824Deficiencies exist in the current understanding of sulfate attack reaction kinetics and damage mechanisms, and this lack of understanding of reaction fundamentals limits the production of concrete that is expected to exhibit long-term durability in sulfate containing environments. A multi-disciplinary team has planned an integrated research program employing a combination of x-ray techniques to improve current understanding of sulfate transport and damage mechanisms in cement-based materials. Under this proposal, the application of three-dimensional x-ray microbeam diffraction mapping, x-ray microtomography (i.e., very high resolution computed tomography or CAT scanning), and soft x-ray microscopy for non-destructive, in situ examination of sulfate damage will be developed.

目前对硫酸盐侵蚀反应动力学和破坏机理的了解存在缺陷，这种对反应基本原理的缺乏限制了有望在含硫酸盐环境中表现出长期耐久性的混凝土的生产。一个多学科团队计划了一项综合研究计划，利用X射线技术的组合来提高目前对硫酸盐在水泥基材料中的传输和破坏机制的理解。根据这一建议，将开发应用三维X射线微束衍射图、X射线显微断层扫描(即极高分辨率计算机断层扫描或CAT扫描)和软X射线显微镜对硫酸盐损害进行非破坏性的现场检查。