沥青路面级配碎石上基层性能改善措施研究

为充分发挥级配碎石基层作为沥青路面结构上基层能够有效缓解下部半刚性基层反射裂缝及水损害等优势,同时提高级配碎石层抗剪强度,减少其抗剪强度弱、易出现塑性变形的风险,将从级配碎石原材料、级配范围以及添加聚丙烯纤维3个方面进行研究,以期综合提高级配碎石基层的路用性能.

Study on Improvement Measures of Base Performance of Graded Crushed Stone on Asphalt Pavement

In order to give full play to the advantages of Graded Macadam Base as the base of asphalt pavement structure,which can effectively alleviate the reflection cracks and water damage of the lower semi-rigid base,and at the same time,to improve the shear strength of macadam layer,so as to reduce its weakness in shear strength and the vulnerability to plastic deformation.In order to comprehensively improve the road performance of Graded Macadam base.In this paper,the raw materials,gradation range and the addition of polypropylene fiber for Graded Macadam are studied.