水泥掺量对筑坝用沥青混凝土长期水稳定性影响

Cement Content Impact on Long-term Water Stability of Asphalt Concrete used for Damming

变化水泥掺量对沥青混凝土水稳定性进行实验后发现:在80℃的水中用水泥填充的沥青混凝土水稳定性系数大于用石粉填充的,结果都高于0.9,总体走向先升高后降低,在水中放置至375h时系数结果最高,而用石粉填充的水稳定性系数一直下降,因此,水泥对沥青混凝土水稳定性的影响要高于石粉对其影响,水泥更能提升其水稳定性,而且当沥青混凝土用6%的石粉和6%的水泥填充时,沥青混凝土的长期水稳定性最高。

Asphalt concrete water stability tests were conducted after changing the cement contents,it was found that： the water stability coefficient of asphalt concrete filled with cement in 80℃ water was bigger than it filled with limestone,both results were higher than 0. 9,and the general trend was to increase early and decrease late. The coefficient result was highest when laid in water for 375 hours,however,the coefficient of water stability filled with limestone was getting lower all the time. Therefore,the cement impact on water stability of asphalt concrete was higher than the limestone,cement could increase further its water stability,moreover,when the asphalt concrete filled with 6% of asphalt and6% of cement,the long-term stability of asphalt concrete was the highest.