中文摘要：

采用压汞测孔试验研究了水泥乳化沥青砂浆（CA砂浆）1000nm以上孔径孔隙的体积分形特征,并进一步分析了CA砂浆内部微细观物理化学性能对其孔体积分形特征的影响机理。结果表明：随着龄期的增加,最可几孔径逐渐减小,CA砂浆内部孔径在5000nm以上的孔隙体积逐渐减少,孔径为1000～5000nm的大毛细孔体积逐渐增加,水泥水化产物的形成及其填充作用是主要影响因素;分形维数随龄期增加而逐渐增大,沥青膜对水泥水化的影响是分形维数增加速率逐渐减慢的主要原因;孔隙率和平均孔径随分形维数的增加而逐渐减小,进一步证明了分形维数的增大象征着CA砂浆内部孔结构的优化。

英文摘要：

The volume fi＇actal characteristic of pores with the size of 〉 1 000 nm in cement and asphalt mortar （CA mortar） was determined by mercury intrusion porosimetry. The effect of internal physical and chemical properties of CA mortar on the fractal characteristic of pore volume was analyzed. The results show that the most probable pore diameter and the volume of pores with the size of 〉 5 000 nm decrease, while the big capillary pores in the size range from 1 000 nm to 5 000 nm increase with the increase of age. The formation and filling effect of the hydration products of cement are the main influence factors that cause this phenomenon. The fractal dimension increases with the increase of age, but the increased rate reduces due to the influence of asphalt membrane on cement hydration. The porosity and the average of pore diameter decrease with the increase of fractal dimension, further indicating that the increase of fractal dimension is a continuous optimization of pore structure inside of CA mortar. The compressive strength and elastic modulus increase, the increased rate decreases when the fractal dimension increases. The fractal dimension is the indirect characterization parameter of macro-mechanical property of CA mortar.