【摘要】 根据混凝土的渗透性大小与其孔结构参数直接相关的观点 ,采用压汞试验测定了水化60d的水泥浆体孔结构和孔分布情况 ,并采用扫描电镜研究了混凝土的微观结构与形貌。结果表明 ,水胶比对混凝土的总孔隙率和孔径分布的影响都很大 ;掺入20 %的粉煤灰的混凝土的累积孔隙体积率有所减少 ,孔径分布偏向于凝胶孔 ,且其微观结构均匀密实 ,Ca(OH) 2 的晶粒含量较少。混凝土微观结构的改善有效地降低了其渗透性更多还原

【Abstract】 It is directed for correlationship between the permeability and the microstructure parameter of concrete. The porosity and diameter distribution of pores of 60d aged cement mortar are investigated by MIP, and the microstructure of concrete is observed by SEM. The results shows that the water cement ratio largely effects the total pore volume and the diameter distribution and, when added with fly ash by weight of 20% cement content, the total pore volume is decreased.更多还原