Measuring Potential Expansion due to Alkali-Silica Reaction in Concrete

测量混凝土中碱硅反应引起的潜在膨胀

• 批准号: 9114313
• 负责人: Leslie Struble
• 金额: $ 3.24万
• 依托单位: University of Illinois at Urbana-Champaign
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-01-01 至 1994-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9114313&HistoricalAwards=false
• 关键词: Measuring; Potential; Expansion; due; Alkali

The overall objective of the research is to understand better and to make more predictable the expansion of concrete due to alkali- silica reaction. The work consists of three broad tasks: 1) to develop a new test method, similar to ASTM C441, to measure the potential reactivity of portland cement in combination with alkali- reactive siliceous aggregate; 2) to develop a performance specification for the potential reactivity of portland cement in combination with alkali-reactive siliceous aggregate for proposal as an alterative to optional specification on alkali content currently included in C150; and 3) to develop a model that describes the kinetics of expansion due to alkali-silica reaction, aimed at improving our understanding of the factors that control expansion and at improving the estimation of ultimate expansion from short-term, accelerated tests.

研究的总体目标是更好地了解和 使混凝土因碱的膨胀更可预测， 二氧化硅反应 这项工作包括三大任务：1） 开发一种新的测试方法，类似于ASTM C441，以测量 波特兰水泥与碱结合的潜在反应性- 反应性硅质骨料; 2）开发性能 波特兰水泥潜在反应性规范 与碱反应性硅质骨料的组合，用于建议 作为碱含量可选规格的替代品 目前包括在C150中;以及3）开发一个模型， 描述了由于碱-硅反应引起的膨胀动力学， 旨在提高我们对控制 膨胀和改进最终膨胀的估计 短期的加速测试。