沥青混合料厂拌热再生技术研究.pdfVIP

Study on Technologies of Asphalt Concrete Hot-Recycling A Dissertation Submitted for the Degree of Master Candidate：Mei Yonggang Supervisor ：Prof. Chen Xinxuan Chang’ an University , Xi’ an , China 摘要 由于自然因素以及交通载荷的共同作用，沥青路面逐渐老化并出现各种病害，最终 进入大修期。出于经济以及环保的考虑，越来越多的工程部门开始采用废旧沥青路面的 再生利用技术。本文探讨了沥青混合料的再生技术及再生过程，并设计了一种适合城市 以及一般等级道路小修作业的小型沥青混合料再生设备。主要进行了以下工作： 通过沥青抽提实验确定了废旧沥青混合料中沥青的含量，对回收的废旧沥青理化性 质进行检测，通过对20% 、50%、65%的旧料掺配比率进行级配实验得出较为合理的旧 料掺配率为20%-50%之间。 给出一种小型移动式沥青混合料再生设备的设计方案，通过计算给出了该设备的一 些主要几何尺寸以及转速、驱动功率等工作参数。 建立该热再生设备的加热模型，计算出其燃油消耗约为 29.16kg/h ，热效率约为 71.5% 。并对设备就行热平衡计算，提出了一些提高设备热能利用率的建议，经过改进 后热效率提升至80%。 给出该再生设备的生产工艺流程以及控制系统原理，采用温度传感器检测出料口料 温，通过温度反馈控制加热搅拌时间以及燃烧器的档位，并提出一些使用和日常维护的 建议。 关键词：热再生，设备，热平衡，热能利用率，工艺流程 Ⅰ Abstract Due to the combined effect of natural factors and traffic loads, asphalt pavement become aging and emerge various diseases, and eventually enter the overhaul period. For economic and environmental considerations, more and more engineering department began to use waste asphalt pavement recycling technology. This paper discusses the recycling technology and the recycling process of the asphalt mixture, and design a small hot-recycling equipment which is suitable for the maintenance of city road as well as the general level road. Mainly doing the following work: Determine the asphalt content of the scrap asphalt mixture by experiment and detect the physical and chemical properties of the recycled waste asphalt, through 20%, 50%, 65% of the old material blending ratio grading experiment arrive at a more reasonable old material blending rate between 20% -50%. Design a small mobile asphalt mixture hot-recycling equipment, through calculating get the main geometry dimensions of the devi