- 刁锡刚1，刘 洋1，徐 林1，朱云升2，肖钰臻2
2023年第2期
摘要
引用本文
摘 要：为研究混凝土拌合物黏聚性的影响因素，采用定量分析方法对不同配合比混凝土进行了黏聚性评价，通过测定各组混凝土的黏聚性指数研究发现：当C50预制箱梁混凝土水胶比为0.32、砂率为38%、粉煤灰掺量为16%、外加剂掺量为1.1%时，其黏聚性最佳，黏聚性指数达到77.9，较基准组提高了18.4%。工程应用表明，优化后的混凝土配合比可有效改善由于黏聚性差导致的预制箱梁外观质量问题。
Abstract： In order to study the factors affecting the cohesiveness of concrete mixture, the quantitative analysis method was used to evaluate the cohesiveness and workability of concrete with different mix proportions. By measuring the cohesiveness index of each group of concrete, it is found that when the parameters of water-binder ratio, sand ratio, fly ash content and admixture content of the C50 concrete of the precast box girder are respectively adjusted to 0.32, 38%, 16% and 1.1%, the cohesiveness of fresh concrete is the best, and the cohesiveness index reaches 77.9, which is 18.4% higher than that of the basic group. The engineering application shows that the optimized concrete mix proportion can obtain better cohesiveness and workability, which can effectively reduce the appearance quality problems of the precast box girder caused by poor cohesiveness.
刁锡刚,刘洋,徐林,等.混凝土黏聚性对预制箱梁外观质量的影响研究[J].混凝土与水泥制品,2023(2):38-41,45.
DIAO X G,LIU Y,XU L,et al.Study on the Effect of Concrete Cohesiveness on the Appearance Quality of Precast Box Girder[J].China Concrete and Cement Products,2023(2):38-41,45.
