沥青路面组合基层材料设计参数试验研究

发布时间：2018-05-30 01:15

  本文选题：道路工程 + 大粒径沥青碎石　； 参考：《合肥工业大学》2015年硕士论文

【摘要】：随着高速公路通车年限的增加,早期修建的高速公路已陆续出现各种病害,并且病害已经发展至基层。道路基层病害成因复杂,治理难度大。对于基层裂缝等病害的治理,目前应用效果比较好的方案是铣刨原水泥稳定碎石上基层,铺筑大粒径沥青碎石基层。本论文以京台高速公路大修养护为依托,在试验基础上,研究组合基层中大粒径沥青碎石材料的配合比设计方法、路面结构的设计参数,并拟定路面结构设计方案。本课题主要研究内容包括以下四个方面：原材料基本性能试验；大粒径沥青混合料配合比设计；大粒径沥青混合料力学性能参数试验研究；大粒径沥青碎石组合基层路面结构设计方案及其应用效果评价。通过室内试验和理论计算得出以下结论：(1)初选沥青用量,结合沥青膜厚度、谢伦堡析漏试验、肯塔堡飞散试验、马歇尔稳定度试验结果,确定大粒径沥青碎石最佳沥青用量为3.1%。(2)大粒径沥青碎石回弹模量范围在20℃为1159.09MP-1718.85MP,15℃为 1646.21MP-2250.55MP,-10℃为6207.57MP-12777.03MP；劈裂强度范围在1.067Mpa-2.205Mp a之间。(3)孔隙率及温度对大粒径沥青混合料的回弹模量和劈裂强度的具有显著影响。(4)利用实测参数,依据弹性层状体系理论,确定大粒径沥青碎石基层沥青路面结构的厚度设计方案,经检测该路面结构方案应用效果良好。课题研究成果为组合基层沥青路面结构的推广应用提供技术参考。
[Abstract]:With the increase of expressway opening life, various diseases have appeared in the early expressway, and the disease has developed to the base. Road base level disease causes are complex, the management difficulty is big. For the treatment of cracks and other diseases in the base course, the scheme with good application effect at present is the base course on the cement stabilized macadam of milling and planing, and the base course of asphalt macadam with large particle size. Based on the overhauling and maintenance of Beijing-Taiwan Expressway, on the basis of experiment, this paper studies the design method of mix ratio of asphalt macadam material with medium and large particle size, the design parameters of pavement structure, and draws up the design scheme of pavement structure. The main contents of this paper include the following four aspects: the basic performance test of raw materials, the mix ratio design of large size asphalt mixture, the experimental study of mechanical performance parameters of large size asphalt mixture; Pavement structure Design Scheme and Application effect Evaluation of large size Asphalt Macadam Composite Base course. Through laboratory tests and theoretical calculations, the following conclusions are drawn: 1) the primary asphalt dosage, combined with the thickness of asphalt membrane, the Schellenburg leakage test, the Kentucky dispersion test, and the Marshall stability test, It is determined that the best asphalt content of large size asphalt macadam is 3. 1: 2) the elastic modulus range of large size asphalt macadam is 1159.09MP-1718.85 MPU at 20 鈩，

本文编号：1953259