發(fā)布時(shí)間：2019-06-03 19:38

【摘要】：溫拌再生技術(shù)越來(lái)越受到重視，但是溫拌再生技術(shù)中對(duì)舊瀝青轉(zhuǎn)移影響因素綜合考慮的研究較少，國(guó)內(nèi)外對(duì)溫拌再生瀝青混合料拌合順序的研究成果不一致，并且國(guó)內(nèi)大都在油石比相同時(shí)對(duì)不同舊料摻量下的路用性能展開(kāi)研究。因此，本文致力于溫拌技術(shù)中舊瀝青轉(zhuǎn)移時(shí)不同影響因素的研究，溫拌再生瀝青混合料拌合順序的研究和不同舊料摻量對(duì)應(yīng)的最佳油石比下的路用性能的研究。 本文對(duì)舊瀝青混合料中舊瀝青轉(zhuǎn)移程度開(kāi)展研究時(shí)先確定試驗(yàn)條件，然后考慮不同的影響因素。首先研究不同的集料粒徑對(duì)舊瀝青轉(zhuǎn)移程度的影響，發(fā)現(xiàn)集料粒徑對(duì)舊瀝青轉(zhuǎn)移影響不大，其次是預(yù)熱溫度�Q拌合時(shí)間和拌合溫度對(duì)舊瀝青轉(zhuǎn)移程度的影響，確定出試驗(yàn)條件；然后是老化時(shí)間�Q舊料摻量和粉膠比對(duì)舊瀝青轉(zhuǎn)移程度的影響；最后是再生劑�Q溫拌劑和舊料摻量對(duì)舊瀝青轉(zhuǎn)移程度的影響，找出不同影響因素對(duì)舊瀝青轉(zhuǎn)移的影響規(guī)律和影響程度，為后續(xù)配合比設(shè)計(jì)油石比的確定提供依據(jù)。 對(duì)拌合順序的研究采用宏觀拌合順序和國(guó)內(nèi)外不同的瀝青混合料拌合順序2種方式。宏觀拌合順序不成型試件，用轉(zhuǎn)移瀝青量作為評(píng)價(jià)指標(biāo)；混合料拌合順序采用馬歇爾方法擊實(shí)成型試件，，以試件的物理力學(xué)指標(biāo)作為評(píng)價(jià)依據(jù)，結(jié)果顯示，2種方式試驗(yàn)結(jié)果一致，建議以后在拌合溫拌再生混合料時(shí)采用國(guó)內(nèi)規(guī)范規(guī)定的拌合順序。 確定不同舊料摻量的最佳油石比，在各最佳油石比下對(duì)混合料的路用性能進(jìn)行研究，結(jié)果表明，隨著舊料摻量的增多，熱拌與溫拌表現(xiàn)出來(lái)的規(guī)律不同，并確定出舊料最佳摻量為20%。
[Abstract]:More and more attention has been paid to warm mix recycling technology, but there are few studies on the influencing factors of old asphalt transfer in warm mix recycling technology, and the research results on the mixing sequence of warm mix recycled asphalt mixture are not consistent at home and abroad. And most of the domestic road performance under different old material content is studied when the oil-stone ratio is the same. Therefore, this paper focuses on the study of different influencing factors of old asphalt transfer in warm mixing technology, the study of mixing sequence of warm mix recycled asphalt mixture and the study of road performance under the optimum oil-stone ratio corresponding to different amount of old asphalt. In this paper, the test conditions are determined when the transfer degree of old asphalt in old asphalt mixture is studied, and then different influencing factors are considered. Firstly, the effect of different aggregate particle size on the transfer degree of old asphalt is studied, and it is found that the aggregate particle size has little effect on the transfer of old asphalt, followed by preheating temperature. The effects of mixing time and mixing temperature on the transfer degree of old asphalt were determined, and then the aging time was determined. The effect of the content of old material and the ratio of powder to glue on the transfer degree of old asphalt; finally, the regenerated agent? The influence of warm mixing agent and old material content on the transfer degree of old asphalt is found out, and the influence law and degree of different influencing factors on the transfer of old asphalt are found out, which provides the basis for the determination of oil-stone ratio in subsequent mix proportion design. The mixing sequence was studied by macro mixing sequence and different asphalt mixture mixing sequence at home and abroad. The macroscopical mixing sequence does not form the specimen, and the amount of transfer asphalt is used as the evaluation index. The mixing sequence of the mixture was compacted by Marshal method, and the physical and mechanical indexes of the specimens were used as the evaluation basis. The results showed that the test results of the two methods were consistent. It is suggested that the mixing sequence stipulated in the domestic specification should be adopted when mixing the recycled mixture with warm mix in the future. The optimum oil-stone ratio of different old materials was determined, and the road performance of the mixture was studied under the optimum oil-stone ratio. The results showed that with the increase of the old material content, the law of hot mixing and warm mixing was different. The optimum content of the old material was determined to be 20%.
【學(xué)位授予單位】：長(zhǎng)沙理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2013
【分類號(hào)】：U414

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本文編號(hào)：2492169