本文通过对比A、B两种膨胀剂的限制膨胀率和抗压强度比,筛选性能优异的膨胀剂,进行干燥收缩试验。试验结果表明,采用A膨胀剂内掺8%,配制的混凝土限制膨胀率和抗压强度比均满足规范要求,随养护龄期的延长,干燥收缩率呈下降趋势。 In this paper, by comparing the limiting expansion rate and compressive strength ratio of two kinds of expansive agents A and B, the expansive agent with excellent performance was screened for the drying shrinkage test. The test results show that the use of A expansion agent mixed with 8%, the preparation of concrete to limit the expansion rate and compressive strength ratio meet the specifications, with the extension of curing age, the drying shrinkage decreased.