基于纳米二氧化硅改性下SAP内养护混凝土的基本性能研究*

研究纳米二氧化硅(NS)改性SAP内养护混凝土的物理力学性能以及抗氯离子渗透性能，提出该混凝土的配合比设计。复掺0.08%SAP和1.5%NS能提高混凝土抗折强度；复掺0.08%SAP和1.0%NS能提高其抗压强度；复掺0.24%SAP和1.5%NS氯离子抗渗透性能最佳；复掺0.24%SAP和0.5%NS能显著减小干燥收缩率。

Research on the basic properties of SAP internal curing concrete based on nano silica modification

The physical and mechanical properties and chloride ion penetration resistance of nano-silica (NS) modified SAP internal curing concrete are studied, and the mix design of this concrete is put forward. The bending strength of concrete can be improved by adding 0.08% SAP and 1.5% NS.The compressive strength of concrete can be improved by adding 0.08% SAP and 1.0% NS. The permeability resistance of chloride ion is the best by adding 0.24% SAP and 1.5% NS. Adding 0.24% SAP and 0.5% NS can significantly reduce the drying shrinkage.