温拌再生剂对沥青和沥青混合料路用性能影响研究

发布时间：2018-09-06 19:52

【摘要】：随着我国高速公路进入大中修时期,翻修过程中铣刨下来的沥青混合料会被当做废料进行处理,不仅耗费大量资金,还会对环境造成污染。传统的热拌沥青混合料由于拌和与压实温度很高,不仅需要消耗大量的能源,还会造成沥青老化,并会释放出大量有毒有害的气体,污染环境、危害施工人员健康。如何解决旧料回收和热拌污染的问题,己成为当今道路再生发展的方向。温拌再生技术融合了温拌技术和再生技术的特点,具有拌和与压实温度低、能源消耗少、利用废旧沥青混合料、减少沥青烟等有毒有害气体排放j减少环境污染等突出优点,具有广泛的应用前景和良好的社会经济效益。本文对旧沥青混合料中老化沥青的性能进行分析,对温拌再生沥青的制备方法进行研究,并对制备好的温再生沥青进行沥青性能试验,分析温再生剂M-1对沥青的作用效果,并由温再生沥青的温度-粘度曲线得到温拌再生沥青混合料的拌和与压实温度。通过小梁低温弯曲梁(BBR)试验,得到温再生剂M-1对沥青的低温性能影响较小,会小幅提高沥青低温蠕变性能。本文利用红外光谱分析仪对老化沥青分别添加基质沥青和0.2%、0.5%、0.8%M-1温再生剂的六种沥青进行分析,得到利用温再生剂M-1和基质沥青组分调节机理共同温拌再生老化沥青的方法是可行的,制得的温拌再生沥青性能能够达到规范要求。本文根据旧料级配,利用新集料对级配进行优化,从而确定温拌再生沥青混合料的合成级配,并确定最佳油石比,并确定拌和顺序、拌和时间,然后通过试验对M-1温拌再生沥青混合料的力学性能、高温性能、水稳定性能进行分析,研究表明M-1温拌再生沥青混合料的路用性能比热拌沥青混合料略有降低,仍能满足规范要求。
[Abstract]:With the expressway in our country entering the period of major and medium repair, the asphalt mixture will be treated as waste in the process of renovation, which will not only cost a lot of money, but also cause pollution to the environment. Because of the high temperature of mixing and compaction, the traditional hot mix asphalt mixture not only needs to consume a lot of energy, but also can cause asphalt aging, release a large number of poisonous and harmful gases, pollute the environment and endanger the health of construction workers. How to solve the problem of waste material recovery and hot mix pollution has become the direction of road regeneration. The warm mix regeneration technology combines the characteristics of warm mixing technology and regeneration technology, and has the outstanding advantages of low mixing and compaction temperature, less energy consumption, using waste asphalt mixture, reducing the emission of toxic and harmful gases such as asphalt smoke and reducing environmental pollution, etc. It has wide application prospect and good social and economic benefits. In this paper, the performance of aging asphalt in old asphalt mixture is analyzed, the preparation method of warm mixed recycled asphalt is studied, and the asphalt performance test of prepared warm recycled asphalt is carried out, and the effect of warm regenerating agent M-1 on asphalt is analyzed. The mixing and compaction temperature of warm recycled asphalt mixture was obtained from the temperature viscosity curve of warm recycled asphalt. Through the (BBR) test of trabecular low temperature bending beam, it is found that the temperature regenerating agent M-1 has little effect on the low temperature performance of asphalt, and will slightly improve the low temperature creep property of asphalt. In this paper, the infrared spectrometer is used to analyze the six kinds of bitumen which are added to the aging asphalt with base asphalt and 0.2m ~ (0.5) and 0.8m ~ (-1) respectively. It is feasible to make use of the temperature regenerating agent M-1 and the adjustment mechanism of the base asphalt component to regenerate the aging asphalt, and the properties of the prepared warm mix recycled asphalt can meet the requirements of the specifications. In this paper, according to the gradation of old materials, the new aggregate is used to optimize the gradation, so as to determine the synthetic gradation of warm-mixed recycled asphalt mixture, determine the optimum ratio of oil to stone, and determine the mixing sequence and mixing time. Then the mechanical properties, high temperature performance and water stability of M-1 warm mix recycled asphalt mixture are analyzed. The results show that the road performance of M-1 warm mix recycled asphalt mixture is slightly lower than that of hot mix asphalt mixture. Can still meet the specification requirements.
【学位授予单位】：大连理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U414

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