沥青混凝土用于简易机场道面的动稳定度研究

Research on Dynamic Stability of Asphalt Concrete Used for Simple Airport Runways

用水泥代替矿粉作为填料的沥青混凝土可用于简易机场道面铺设,对其在60℃环境不同机型不同胎压下的动稳定度进行了试验研究。结果表明:在同样作用次数下,掺水泥的沥青混合料比掺矿粉的混合料变形小,掺水泥的混合料动稳定度变化趋势与掺矿粉混合料相似;但随胎压增大,掺水泥混合料动稳定度下降幅度小,比掺矿粉混合料稳定。因此,用水泥代替矿粉作为填料的沥青混凝土用于简易机场道面铺设,动稳定度符合标准,且优于掺矿粉的混合料。

The dynamic stability of asphah concrete with cement as its filling instead of mineral powder used for simple airport runways under different types of planes and tyre pressures at 60℃ is investigated by test. The test result shows that the asphalt mixture with cement has smaller deformation than the asphalt mixture with mineral powder under the same acting times, and the changing tendency of the dynamic stability of the mixture with cement is similar to that of the mixture with mineral powder. However, the decrease of the dynamic stability of the mixture with cement is less in amplitude and more stable than the mixture with mineral powder with the increase of tyre pressure. Therefore, when the asphalt concrete with cement instead of mineral powder as its filling is applied for the runways of simple airport, its dynamic stability conforms to the standard and is better than the mixture with mineral powder.