水泥稳定级配碎石基层材料路用性能及超轴载下疲劳寿命研究

The Pavement Performance of Cement Stabilized Crushed Stones and Corresponding Research on Adaptation of Heavy Traffic

目的研究较低掺量的水泥的级配碎石基层材料完全满足重载交通下的力学性能指标和路用性能指标，分析水泥稳定级配碎石基层材料的路用性能及在重载交通下的适用性．方法运用《公路工程无机结合料稳定材料试验规程》（JTGE51-2009）中规定的试验方法，采用骨架密实型级配，通过静压和振动两种成型方法，在最佳含水量时制作试件．结果当水泥质量分数在3．5％以上时，骨架密实型水泥稳定级配碎石材料的基层强度可以达到重载交通路用性能要求．当轴载不大于140kN的情况下，水泥稳定级配碎石的使用寿命可以满足设计期内使用的要求．结论使用水泥稳定级配碎石做道路基层时，推荐使用水泥质量分数为3．5％～4．5％，水泥稳定级配碎石基层材料时奄裁交通具有良好的适用性．

The pavement performance of cement stabilized graded crushed stone base course mate- rial and the applicability under heavy traffic are studied in the paper. The results indicated that gra- ded crushed stone base material with low dosage of cement can fully meet the mechanical proper- ties and pavement performance under heavy traffic. The test method is based on the Test Method of Materials Stabilized with Inorganic Binders for Highway Engineering （JTG E51--2009 ）. The spec- imens were made by skeleton dense gradation with two methods of Static pressure and vibration under the best water content. The research has used the material of cement stabilized graded crushed stone with skeleton dense type. When the cement content is 3.5 % or more, the material strength can be achieved the requirements of heavy traffic road performance. When the Axle load