超高强高性能混凝土的孔结构与界面结构研究

The Pore Structure and Interface Structure of Super High-strength Concrete

高效活性矿物掺料对提高强度及耐久性的作用极大 ,除了能改善混凝土的水化产物组成外 ,也能改善混凝土的微结构。本文运用压汞法、氮吸附法、显微硬度法、扫描电镜分析等手段 ,研究了高效活性矿物掺料对超高强混凝土孔结构和界面结构的影响。

The high-efficiently active mineral additives play an extremely important role for inceasing strength and durability of concrete,not only improving the compositions of cement hydration products,but also improving the microstructure of concrete.In this paper,the effects of mineral additives on pore structure and interface structure have been tested by the methods of mercury intrusion porosimetry,nitrogen absoption,micro-hardness analysis and SEM analysis.The rezults show that,to co-operatively adding silica fume and other ultra-fine additives and to further decreasing the water binder ratio is an effective way for improving microstructure of concrete.