【作者】 赵慧敏；

【导师】 陈静云；

【作者基本信息】 大连理工大学 ， 市政工程， 2008， 硕士

【摘要】 上世纪八、九十年代建成的高等级公路在经历了交通量迅速增长及雨雪等各种自然环境的考验之后,已经逐渐进入大、中修期,并且近几年建成的高等级公路也需做好日常性养护工作。在建设环保和节约型道路上,热再生技术已逐渐显现其优势。实践经验证明:在利用旧沥青混合料过程中,对老化沥青进行有效再生是重要环节。与国外对沥青路面热再生技术的应用及研究相比,我国在热再生技术应用方面有一定的优势,但是在理论体系、设计体系和生成实践体系仍有所欠缺。因此,我们必须加快对热再生技术的研究,尽快形成一套适合我国的再生沥青混凝土技术规范。本论文主要针对再生混合料中的胶结料进行较为系统的研究,主要内容包括:1)基于对沥青老化规律和再生机理的分析,根据组分调节理论,利用老化沥青针入度、高于和低于再生目标沥青的针入度三点,确定再生剂用量,并检验此再生剂用量确定方法的可行性;2)利用常规的评价指标对三种再生沥青进行评价;3)对再生沥青的评价标准,除了常规指标——国内经常用的对再生沥青评价标准,本次试验利用了SHRP中的PG结合料规范对三种再生沥青的高温、中温和低温性能进行了评价,根据相应指标对再生效果进行度量,并对其进行了PG分级;4)通过两套评价标准对再生沥青效果的检验,对它们进行比较,为今后的热再生技术的研究提供素材。目前国内对再生沥青的性能评价指标尚未有统一标准,主要是利用针入度、软化点、延度等常规技术指标表征再生剂的再生效果,利用SHRP指标衡量再生效果的研究相对于我国需要大量地对再生沥青进行研究是很少的。更多还原

【Abstract】 Due to the quickly increased traffic and the various natural environment, such as rain and snow etc, the high-grade highways built in the early 1980s and 1990s have got into the extent of the intermediate or major repair, furthermore, it is necessary to maintain the high-grade highways daily. In constructing environmental protection and conservation types of roads, the hot recycling technology has already presented its advantage gradually. It has already been proofed by practices that in recycling asphalt mixture, it is critical to make the aging asphalt be recycled effectively. Compared with technical applications and researches of the hot recycling technology abroad, the applications in our country our country has certain advantage apart from the system info, design info and practice info. Therefore, we have to speed to research the hot recycling technology in order to set a suit of concrete technical criteria in recycling asphalt for ourselves.The main purpose of this dissertation is to study the binder of the recycled mixture. It includes the following parts:1) Based on the analysis for the aging rules and the recycling mechanism of the asphalt and according to the component adjusting theory, making use of three points, that are the penetration of the aging asphalt, higher and lower than that of the target asphalt, we determine the proportion of the recycling agent and verifies the feasibility of the method.2) Make use of traditional asphalt cement testing methods to evaluate three kinds of blended binders.3) To evaluate the recycle asphalt, there is another evaluating standard apart from the traditional one which is usually applied at home, that is the SHRP Performance Graded (PG) binder system. According to the system, the dissertation evaluates the performance of three kinds of blended binders at high temperature, middle temperature and low temperature respectively and finally has them PG classified in accordance with the results measured by the corresponding evaluative indexes.4) According to the test results, the dissertation compares two kinds of evaluating system and supplies the materials to the research of the hot recycling technology for future. At present, there is no uniform standard for evaluating the performance of the recycle asphalt domestically and traditional testing methods such as penetration, softening point and so on are mostly used. It needs a lot of research to utilize SHRP indexes to test the recycling effects, but in fact we have done a lot about recycling asphalt.更多还原