C30~C50自密实混凝土的配制技术研究

Research on Preparation Technology of C30~C50 Self-compacting Concrete

文章通过对用水泥+粉煤灰、水泥+粉煤灰+矿粉、水泥+粉煤灰+硅灰三种复合胶凝体系所配制的自密实混凝土性能进行实验研究,对比分析了粉煤灰、矿粉和硅灰三种矿物掺合料,对自密实混凝土的力学及工作性能方面的影响。研究表明,用这三种矿物掺合料组成的不同复合胶凝体系,虽然都能够配制出力学及工作性方面满足要求的自密实混凝土,但是水泥+粉煤灰+硅灰体系的性能最佳,水泥+粉煤灰+矿粉体系的性能略差,水泥+粉煤灰体系的性能最差。

In this paper, the properties of self-compacting concrete prepared by three composite cementitious systems of cement + fly ash, cement + fly ash + mineral powder,cement + fly ash + silica fume were studied. The influence of three mineral admixtures of fly ash, mineral powder and silica fume on the mechanical properties and workability of self-compacting concrete were compared and analyzed. The research shows that although different composite cementitious systems composed of these three mineral admixtures can prepare self-compacting concrete that meets the requirements in terms of mechanics and workability, the performance of cement + fly ash + silica fume system is the best, the performance of cement + fly ash + mineral powder system is slightly worse, and the performance of cement + fly ash system is the worst.