基于复掺矿物外掺料的高性能混凝土配合比设计研究

Research on Durability of High Performance Concrete with Mineral Admixture

通过"全集算法"对复掺矿粉-粉煤灰矿物掺合料对高性能混凝土进行配合比设计,研究复掺矿粉-粉煤灰的不同比例和不同掺量对高性能混凝土的工作性、力学性能的影响规律。结果表明:当矿粉与粉煤灰的比例为60∶40,掺量为胶凝材料总量的35%时,复掺矿粉-粉煤灰矿物掺合料可发挥"超叠加效应",优化界面过渡区,提高高性能混凝土的密实度,改善高性能混凝土的耐久性。

Mix design of high performance concrete combined with mineral admixture was conducted by adopting the overall calculation method, and the impact of the ratio of slag to fly ash and admixture content on the performance and mechanical properties of the high performance concrete was studied. The results show that when the ratio of slag to fly ash is 60 ： 40 and admixture accounts for 35% of the binding material, an additive effect occurs between the slag and fly ash, and both the density anddurability of the high performance concrete are improved.