摘要
在原材料物理力学性能试验的基础上,利用图解法并经过配合比调整和优化,得出AC-13Ⅰ矿料的配合比。在此基础上,通过不同纤维种类、不同纤维掺量下沥青混合料的马歇尔试验,分析纤维种类和掺量对最佳沥青用量OAC、OACmax和OACmin的影响,从纤维在沥青混合料中分散程度出发,得出纤维最佳掺量。进一步通过高温车辙试验,分析纤维增强机理,研究不同纤维种类和不同掺量对沥青混合料动稳定度的影响,从纤维对沥青混合料高温性能的影响特征出发,得出不同种类纤维的最佳掺量。结果表明,不同种类的纤维在沥青混合料中对应着不同的最佳掺量;马歇尔试验和高温车辙试验所确定的沥青混合料最佳纤维掺量具有较好的相关性;最后,建立了考虑基体沥青混合料动稳定度与纤维掺量、纤维类型影响的纤维沥青混合料动稳定度的计算模型。
On the basis of the physical and mechanical tests of the raw materials, the mineral mixture of AC-13 Ⅰ is obtained by using graphic method and adjustment and optimization of the mixture. Then, through Marshall test of fiber asphalt mixture under different fiber types and different fiber contents, the influence of fiber type and content on the OAC, OACmax and OACmin is analyzed, from the dispersion of fiber in asphalt mixture, the best fiber content is obtained. Furthermore, through the high-temperature rutting test, the influence of fiber type and content on the dynamic stability of asphalt mixture is studied, the mechanism of fiber reinforcement is discussed, then, from the impact characteristics of fiber to dynamic stability of the asphalt mixture, the best fiber content of different fiber type is obtained. The results show that different type of fiber has it＇s optimal content in the corresponding asphalt mixture respectively; and the best fiber content in asphalt mixture determined by Marshall test and high temperature rutting test has good correlation. Finally, the calculating model of the dynamic stability of fiber asphalt mixture is established, considering the influence of the fiber content and fiber type on the dynamic stability of asphalt mixture.
出处
《公路》
北大核心
2009年第2期141-146,共6页
Highway
