石灰石粉对水泥-粉煤灰混凝土性能的影响

Influence of Limestone Powder on Properties of Concrete Prepared from Cement and Fly ash

本文主要研究了石灰石粉对水泥-粉煤灰混凝土工作性、抗压强度、耐久性能(抗水渗透性能、抗碳化性能和抗冻性能)的影响,并利用SEM-EDS和孔结构微观分析仪对其进行了机理分析。试验结果表明:石灰石粉应用于水泥-粉煤灰混凝土,不仅可改善混凝土的工作性能,而且可提高混凝土的抗压强度,但对混凝土的耐久性能影响不大。

The influence of limestone powder with different proportions on the workability,compressive strength,and durability of concrete prepared from cement and fly ash was studied.The acting mechanism was also researched by SEM-EDS and pore structure.The results showed that introduction of limestone powder into concrete prepared from cement and fly ash,not only improved the workability of pumping concrete,but also increased compressive strength of pumping concrete,and hardly influenced durability of concrete,including impermeability in water,carbonation resistance and freezing resistance.