论文部分内容阅读
采用室内弯拉疲劳试验研究一定荷载和环境条件下的冷再生基层混合料的疲劳性能,得出冷再生基层混合料的疲劳方程,并与普通半刚性基层材料、添加20%、40%碎石新骨料的冷再生基层混合料的疲劳性能进行对比。试验表明各种材料疲劳性能优劣的一般规律为:普通半刚性材料的疲劳性能>添加40%碎石新骨料的冷再生基层混合料>添加20%碎石新骨料的冷再生基层混合料>完全冷再生基层混合料;在高应力比下,添加20%碎石新骨料的冷再生基层混合料的疲劳性能相对较好,在低应力比下添加40%碎石新骨料的冷再生基层混合料的疲劳性能相对较好,冷再生基层混合料可以满足规范对二级公路强度的要求,因此冷再生基层混合料能应用于等级为二级及以下的公路工程中。
The fatigue behavior of cold reclaimed grassroots mixture under certain load and environmental conditions was studied by indoor bending fatigue test. The fatigue equation of cold reclaimed grassroots mixture was obtained. Compared with common semi-rigid base material, 20% and 40% The fatigue properties of the freshly recycled grass-roots mixture were compared. The general rules for the fatigue performance of various materials are as follows: Fatigue properties of common semi-rigid materials> Cold reclaimed base mix with 40% new aggregates of gravel> Cold reclaimed base mix with 20% new aggregate of rubble Material> completely cold recycled grassroots mixture; under high stress ratio, the fatigue performance of the cold reclaimed grassroots mixture with 20% fresh aggregate was relatively good, adding 40% of new aggregates of gravel under low stress ratio Cold-reclaimed grass-roots mixture has relatively good fatigue performance. The cold-reclaimed grass-roots mixture can meet the requirements of the second-class highway strength. Therefore, the cold-reclaimed grass-roots mixture can be used in highway engineering with grade two and below.