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首页> 美国政府科技报告 >New Hamphires's Concrete Aggregate and Alkali-Silica Reactivity. Statewide Assessment of Fine and Coarse Concrete Aggregate
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New Hamphires's Concrete Aggregate and Alkali-Silica Reactivity. Statewide Assessment of Fine and Coarse Concrete Aggregate

机译：新罕布什尔的混凝土骨料和碱 - 二氧化硅反应性。全州范围内细骨料和粗混凝土的评估

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Alkali-silica reactivity (ASR) has become a major concern with regards to long-term durability of concrete structures in New Hampshire. Many concrete structures built by the New Hampshire Department of Transportation (NHDOT) show visible distress. The cause of this distress has been suspected to be deleterious ASR expansion or other destructive processes in conjunction with ASR. Verification of an association between ASR and visual observations of deterioration within the structures has not been done. The objectives of this research were the following: Determine the potential for the development of alkali-silica reactivity in concrete using fine and coarse aggregates in New Hampshire; Confirm the presence and extent of alkali-silica reactivity (ASR) in existing NHDOT concrete structures; Identify the types of rocks in New Hampshire that are potentially reactive; Evaluate the need for an additional study to determine the amount of admixtures required for the minimization of ASR in new concrete within New Hampshire.

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