高钙灰制备高性能混凝土耐久性研究

The research on the durability of HPC with high oxide calcium fly ash

从抗渗、抗冻融、抗碳化及恶劣环境下钢筋锈蚀、长期物理力学性能等方面对大掺量高钙灰所配制高性能混凝土的耐久性进行了实验研究，结果表明高钙灰高性能混凝土的低水胶比、高密实度是耐久性的关键，高钙灰的滚动减水效应显著，所配制的ＨＰＣ塑性阶段工作性能良好，早期硬化强度高，后期强度稳定增长。

Based on resist permeability, resist freezen, resist carbonization, reinforcing bar rust eaten under disgusting environment and physical mechanics property, the durability of high performance concrete (HPC) with amounts high oxide calcium fly ash is studied. It is shown the key elements to inflect the durability that are low water cement ratio and high density of hing oxide calcium fly ash HPC. Roll reduce water effect of the high oxide calcium fly ash is obvious, HPC workbility at plasticity stage is good, harden strengh at earlier stage is high, later stage strengh improve steady.