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本文通过对比试验,研究超时缓凝对混凝土各龄期抗压强度的影响,结果是:超时缓凝对混凝土各龄期抗压强度影响显著,超时缓凝时间越长,各龄期混凝土抗压强度越低;在本试验条件下,如果混凝土配制强度富余量较大,超时缓凝在2-3d,其28d强度可达到设计要求;超时缓凝在4d及以上,其28d强度就难以达到设计强度了。本文意在为处理混凝土工程中超时缓凝质量问题提供技术参考。
In this paper, through the comparative test, the study of the impact of overtime retardation on the compressive strength of concrete at different ages showed that the effect of overtime retardation on the compressive strength of concrete at different ages was significant, the longer the retarding retardation, the compressive strength Under the conditions of this test, if the allowable amount of concrete preparation strength is large, the time-delay retardation is within 2-3 days, and the 28-day strength can meet the design requirements. When the time-out retardation reaches 4 days and above, the strength of 28 days is hard to reach the design Intensity. This article is intended to provide a technical reference for dealing with the quality of overtime retarding in concrete engineering.