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

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
依托单位国家:
加拿大
项目类别:
Engage Grants Program
财政年份:
2014
资助国家:
加拿大
项目状态:
已结题
起止时间:
2014-01-01 至 2015-12-31

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中文摘要
翻译
碱集料活性是一个普遍存在的问题,对加拿大的大量混凝土结构造成了严重的破坏。当具有有利于与碱反应的特性的集料用于由含有大量碱的普通波特兰水泥制成的混凝土时,就会出现这个问题。当混凝土暴露在潮湿中时,反应就会开始,导致膨胀和裂缝,这通常是在现场暴露几年后观察到的。
英文摘要
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.
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