王 军1,李 曦1,徐芬莲1,周永祥2,*,吴晓君2,李少杰3,冷发光4,高 超4
王军,李曦,徐芬莲,等.混凝土配合比设计中的骨料问题研究[J].混凝土与水泥制品,2024(9):1-6,12.
WANG J,LI X,XU F L,et al.Research on aggregate issues in concrete mix proportion design[J].China Concrete and Cement Products,2024(9):1-6,12.
混凝土配合比设计中的骨料问题研究
王 军1,李 曦1,徐芬莲1,周永祥2,*,吴晓君2,李少杰3,冷发光4,高 超4
王军,李曦,徐芬莲,等.混凝土配合比设计中的骨料问题研究[J].混凝土与水泥制品,2024(9):1-6,12.
WANG J,LI X,XU F L,et al.Research on aggregate issues in concrete mix proportion design[J].China Concrete and Cement Products,2024(9):1-6,12.
摘 要:研究了混凝土配合比中骨料的相关问题。结果表明:混凝土中的骨料可分为天然骨料、机制骨料、废弃物骨料和人造骨料;不同国家的混凝土配合比设计方法步骤不同,我国配合比设计方法中缺乏对骨料级配的模型化计算方法;Talbol通式和Dinger-Funk方程均可用于计算混凝土的骨料级配,当分布指数在0.45~0.50时,C40混凝土的工作性和抗压强度最优;砂石骨料一体化设计获得的级配并不适用于所有强度等级的混凝土,不同分布指数下的骨料级配理论曲线需要考虑其适用的强度等级范围。
Abstract: The related issues of aggregates in concrete mix proportions were studied. The results indicate that aggregates in concrete can be divided into natural aggregates, manufactured aggregates, waste aggregates, and artificial aggregates. The design methods and steps for concrete mix proportions vary in different countries, and there is a lack of modeling calculation methods for aggregate gradation in Chinese mix proportion design methods. Both the Talbol formula and the Dinger-Funk equation can be used to calculate the aggregate gradation of concrete. When the distribution index is between 0.45 and 0.50, the workability and compressive strength of C40 concrete are optimal. The gradation obtained from the integrated design of sand and gravel aggregates is not applicable to all strength grades of concrete. The theoretical curve of aggregate gradation under different distribution indices needs to consider the range of strength grades it is suitable for.
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