Quantifying and mitigating alkali-aggregate reactivity risk in AAROC aggregate resources

量化和减轻 AAROC 骨料资源中的碱骨料反应风险

• 批准号: 477625-2014
• 负责人: Nehdi, Moncef
• 金额: $ 1.68万
• 依托单位: University of Western Ontario
• 依托单位国家: 加拿大
• 项目类别: Engage Grants Program
• 财政年份: 2014
• 资助国家: 加拿大
• 起止时间: 2014-01-01 至 2015-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=565865
• 关键词: Quantifying; mitigating; alkali; aggregate; reactivity

Alkali-aggregate reactivity is a widespread problem, inflicting serious damage to a large number of concrete structures in Canada. The problem occurs when aggregates having characteristics conducive to reaction with alkalies are used in concrete made with ordinary portland cement incorporating a significant content of alkalies. The reaction initiates when concrete is exposed to moisture, resulting in expansion and cracking, normally observed several years after field exposure.

碱-骨料反应性是一个普遍存在的问题，在加拿大对大量混凝土结构造成严重损害。当具有有助于与碱反应的特性的骨料用于由掺入大量碱的普通波特兰水泥制成的混凝土中时，问题出现。当混凝土暴露于湿气时，反应开始，导致膨胀和开裂，通常在现场暴露几年后观察到。