水工混凝土碱骨料反应“最劣点”效应试验研究

Experimental research on the worst point effect of hydraulic concrete alkali aggregate reaction

在混凝土的碱硅酸反应中,活性骨料存在一个最不利掺量。在最不利掺量时,由碱硅酸反应所造成的膨胀率最大,引起的危害最严重,小于或大于最不利掺量时,膨胀率都会减少。结合某一实际水利工程所用混凝土骨料所具有的潜在活性,通过试验及理论分析研究确定了骨料掺量的最劣点及其对结构的最大破坏程度,为同类工程结构混凝土的配合比设计提供了参考和依据。

In the concrete alkali silica reaction, there is the most disadvantaged content of activity aggregate.On the most disadvantaged content of active aggregate, the expansion rate by alkali silica reaction is the largest, and the harm caused the most serious, less than or greater than the most disadvantaged content, the expansion rate will be reduced.Based on the concrete aggregate of certain hydraulic project which has potential activity, through theoretical analysis and experimental research, the worst point of aggregate amount and the greatest degree of damage to the structural concrete are determined, which will provide basis and reference for the concrete mix design of similar project.