低温型高性能冷补沥青混合料制备与应用技术
发布时间：2019-06-03 00:25
【摘要】：冷补沥青混合料具有低温修复的特点,即使在冬季也能用于铺装结构的有效修补,可用于道路养护。然而冷补沥青混合料通常存在低温和易性不佳、早期强度低以及水稳定性不足等缺陷,严重制约着冷补沥青混合料的应用,论文针对此开展高性能冷补沥青混合料的研究。论文利用有限元软件ANSYS模拟沥青路面铺装结构,针对轮载与修补荷载的相对位置设计了5种工况具体分析修补结构的应力应力响应规律,通过关键位置的分析提出模量参数作为控制冷补料工艺的指标。试验研究以冷补沥青结合料的配比为基础,采用控制变量法通过三大指标试验确定最优组分,结合粘度试验制备满足施工和易性的冷补沥青结合料。通过低温工作性试验、初始强度试验、成型试验、水稳定性等试验确定冷补沥青结合料的配比方案。通过设计冷补沥青混合料的最优级配、计算最佳沥青用量和研究最佳树脂用量,开发出能够满足-10℃施工的高性能冷补沥青混合料。在获得符合路用性能要求的高性能冷补沥青混合料后,于室外施工,针对裂缝和坑槽病害开展施工工艺的探讨。论文针对低温型高性能冷补沥青混合料的制备和施工进行梳理并提出修补工艺流程。
[Abstract]:Cold filling asphalt mixture has the characteristics of low temperature repair, even in winter can be used for effective repair of pavement structure, can be used for road maintenance. However, cold fill asphalt mixture usually has some defects, such as low temperature and poor workability, low early strength and insufficient water stability, which seriously restricts the application of cold fill asphalt mixture. In this paper, the research of high performance cold fill asphalt mixture is carried out. In this paper, the finite element software ANSYS is used to simulate the asphalt pavement structure, and the stress response law of the repaired structure is analyzed according to the relative position of wheel load and repair load. Through the analysis of the key position, the modulus parameter is put forward as the index to control the cold feeding process. Based on the ratio of cold-replenished asphalt binder, the optimal component was determined by three index tests by controlled variable method, and the cold-replenished asphalt binder satisfying construction and ease was prepared by viscosity test. The proportioning scheme of cold replenished asphalt binder was determined by low temperature workability test, initial strength test, molding test and water stability test. By designing the optimal gradation of cold fill asphalt mixture, calculating the optimum asphalt content and studying the optimum resin content, a high performance cold fill asphalt mixture which can meet the construction of-10 鈩，
本文编号：2491533
[Abstract]:Cold filling asphalt mixture has the characteristics of low temperature repair, even in winter can be used for effective repair of pavement structure, can be used for road maintenance. However, cold fill asphalt mixture usually has some defects, such as low temperature and poor workability, low early strength and insufficient water stability, which seriously restricts the application of cold fill asphalt mixture. In this paper, the research of high performance cold fill asphalt mixture is carried out. In this paper, the finite element software ANSYS is used to simulate the asphalt pavement structure, and the stress response law of the repaired structure is analyzed according to the relative position of wheel load and repair load. Through the analysis of the key position, the modulus parameter is put forward as the index to control the cold feeding process. Based on the ratio of cold-replenished asphalt binder, the optimal component was determined by three index tests by controlled variable method, and the cold-replenished asphalt binder satisfying construction and ease was prepared by viscosity test. The proportioning scheme of cold replenished asphalt binder was determined by low temperature workability test, initial strength test, molding test and water stability test. By designing the optimal gradation of cold fill asphalt mixture, calculating the optimum asphalt content and studying the optimum resin content, a high performance cold fill asphalt mixture which can meet the construction of-10 鈩，
本文编号：2491533
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