發(fā)布時(shí)間：2019-06-06 01:45

【摘要】：再生瀝青混合料由溫度比較高的新料與加熱溫度比較低的舊混合料混合而成�；厥諡r青混合料的溫度低或摻入比例大則再生混合料的出料溫度低,攤鋪后可能造成碾壓溫度達(dá)不到要求,影響壓實(shí)度的后果。為了解決這一問題可降低回收料比例,或者提高回收料或新料溫度,但兩種方法均存在不足。在瀝青或?yàn)r青混合料中加入溫拌劑是解決上述問題較好的技術(shù)方法之一。論文首先對(duì)老化瀝青溫拌再生機(jī)理展開研究,通過室內(nèi)模擬老化試驗(yàn),模擬老化瀝青+再生劑+溫拌劑的再生過程。通過對(duì)老化瀝青再生過程中瀝青組分、化學(xué)組成、微觀結(jié)構(gòu)及宏觀性能變化的研究,分析總結(jié)了瀝青老化及加溫拌劑的再生機(jī)理。在室內(nèi)模擬相關(guān)試驗(yàn)分析的基礎(chǔ)上,對(duì)實(shí)際路面回收料中的老化瀝青進(jìn)行試驗(yàn)研究。室內(nèi)模擬的老化與實(shí)際路面的老化存在不同,對(duì)回收料中的老化瀝青溫拌再生過程進(jìn)行試驗(yàn)分析,并與室內(nèi)模擬研究成果進(jìn)行對(duì)比,總結(jié)完善了老化瀝青溫拌再生機(jī)理。以上述研究和廠拌熱再生為基礎(chǔ),對(duì)加入溫拌劑的廠拌溫再生混合料性能進(jìn)行試驗(yàn)研究。對(duì)比了廠拌熱再生和溫拌再生混合料路用性能的差異。溫拌再生混合料的性能能夠滿足瀝青混合料技術(shù)性能要求,具有比廠拌熱再生混合料更低的拌和溫度,溫拌劑的加入解決了提高回收料比例或降低加熱溫度的問題,并且溫拌再生混合料具有更好的低溫性能。研究成果對(duì)溫拌再生的實(shí)際應(yīng)用具有指導(dǎo)意義。
[Abstract]:Recycled asphalt mixture is composed of new material with higher temperature and old mixture with low heating temperature. If the temperature of recycled asphalt mixture is low or the proportion of recycled asphalt mixture is large, the discharge temperature of recycled mixture is low, which may cause the rolling temperature to not meet the requirements after paving, which may affect the compaction degree. In order to solve this problem, the proportion of recycled materials can be reduced or the temperature of recycled materials or new materials can be increased, but both methods have shortcomings. Adding warm mixture to asphalt or asphalt mixture is one of the better technical methods to solve the above problems. In this paper, the mechanism of warm mixing and regeneration of aged asphalt is studied, and the regeneration process of warm mixing agent of aging asphalt is simulated by simulated aging test in laboratory. Based on the study of asphalt composition, chemical composition, microstructure and macroscopic properties in the process of asphalt regeneration, the regeneration mechanism of asphalt aging and heating mixture was analyzed and summarized. Based on the experimental analysis of laboratory simulation, the aging asphalt in the actual pavement recovery material is studied. The aging of indoor simulation is different from that of actual pavement. The process of warm mixing and recycling of aged asphalt in recycled materials is tested and analyzed, and the results are compared with the results of indoor simulation, and the mechanism of warm mixing and recycling of aged asphalt is summarized and improved. Based on the above research and the thermal regeneration of plant mixing, the properties of the mixture with warm mixing agent were studied. The differences of road performance between hot and warm mixture were compared. The performance of warm mix recycled mixture can meet the technical performance requirements of asphalt mixture, and has lower mixing temperature than hot recycled mixture in factory mixing. The addition of warm mixing agent solves the problem of increasing the proportion of recycled materials or reducing the heating temperature. And warm mix recycled mixture has better low temperature performance. The research results have guiding significance for the practical application of warm mix regeneration.
【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：U414

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