【摘要】 运用X射线衍射分析(XRD)、差热-热重分析(DTA-TG)、扫描电子显微镜观察和X射线能谱分析(SEM-EDAX)及压汞法孔结构分析(M IP)研究了高性能混凝土的水化产物、显微结构和孔结构,在理论上探讨了高性能混凝土在严酷环境条件下的高耐久性机理。结果表明,高性能混凝土的水化产物是低C/S比的CSH凝胶、CH和C3AH6,其显微结构致密,孔结构以孔径小于10 nm的凝胶孔为主。合理的水化产物组成和致密的微观结构决定了高性能混凝土具有优异的耐久性。更多还原

【Abstract】 The hydration products,microstructure and pore-structure of high performance concrete(HPC) are investigated by X-ray diffraction(XRD),differential thermal analysis-thermogravimetry(DTA-TG),scanning electron microscope-energy dispersion X-ray analysis(SEM-EDAX),and mercury intrusion porosimetry(MIP).The high durability mechanism of HPC is theoretically discussed.Results show that hydration products of HPC include CH,C3AH6 and CSH gel having low C/S ratio.The pore structure of the hydration products is very compact and the diameter of the gel pores is less than 10 nm.The sound composition and the compact microstructure of the hydration product lead to the excellent durability of HPC.更多还原