本文選題：乳化瀝青冷再生　切入點：動態(tài)模量　出處：《山東建筑大學》2017年碩士論文　論文類型：學位論文

【摘要】：近年來,隨著公路使用年限的增加,一些公路的路用性能下降,這些路面已進入大、中修養(yǎng)護期,勢必產(chǎn)生大量的廢舊瀝青混合料,因此,路面再生技術越來越受到人們的重視。乳化瀝青冷再生混合料相對傳統(tǒng)熱拌瀝青混合料,生產(chǎn)過程相對環(huán)保,且可以最大程度的對廢舊瀝青混合料進行回收處理,所以對其開展研究具有重大的經(jīng)濟和環(huán)境效益。不同于一般研究方式,本文采用一種室內(nèi)試驗與試驗路相結(jié)合的方式進行乳化瀝青冷再生混合料動態(tài)參數(shù)和疲勞性能的研究。本文首先對原材料的各項性能進行檢測,采用旋轉(zhuǎn)壓實法成型乳化瀝青冷再生混合料試件,確定了乳化瀝青冷再生混合料的配合比及最佳瀝青用量和最佳含水率等指標;然后以室內(nèi)試驗配比為依據(jù),對相關試驗路段的鋪筑過程進行了介紹(進行了試驗路鋪筑和現(xiàn)場壓實度、強度等指標的檢驗);最后對試驗路進行大規(guī)模取芯、取梁工作,開展了劈裂試驗、動態(tài)模量試驗、疲勞試驗、OT (動態(tài)拉伸)試驗,在對現(xiàn)場試件進行測試的基礎上,對比分析了室內(nèi)成型試件與試驗路取回芯樣之間性能的差異,并探討了基于冷再生混合料的路面結(jié)構(gòu)組合設計。通過研究發(fā)現(xiàn),乳化瀝青冷再生混合料最佳瀝青用量3.4%,最佳含水率3.5%;通過對比乳化瀝青冷再生試驗路芯樣和室內(nèi)成型試件的劈裂數(shù)據(jù)后發(fā)現(xiàn),試驗路取回芯樣整體劈裂強度高于實驗室成型試件劈裂強度;通過對比乳化瀝青冷再生混合料試驗路芯樣和熱拌瀝青混合料(HMA)動態(tài)模量、相位角后發(fā)現(xiàn),乳化瀝青冷再生混合料溫度敏感性較熱拌瀝青混合料(HMA)低;通過對比乳化瀝青冷再生試驗路芯樣和室內(nèi)成型試件的動態(tài)模量、相位角后發(fā)現(xiàn),乳化瀝青冷再生試驗路取回的芯樣相比室內(nèi)成型試件的模量較高,相位角較小,試驗路芯樣強度較高;對取回芯樣進行動態(tài)拉伸(OT)試驗,發(fā)現(xiàn)該種乳化瀝青冷再生混合料具有一定的抵抗反射裂縫性能;對試驗路取回芯樣精確加工,進行了四點彎曲疲勞試驗,得出疲勞方程,采用BISAR軟件進行計算,得出設計路面使用壽命接近500萬次,可以承受年限內(nèi)交通荷載作用的結(jié)論。
[Abstract]:In recent years, with the increase of the service life of the highway, the road performance of some highways has declined. These roads have entered the period of large and medium repair maintenance, which is bound to produce a large number of used asphalt mixtures. The technology of pavement regeneration is paid more and more attention. Compared with the traditional hot mix asphalt mixture, emulsified asphalt cold recycled mixture is relatively environmentally friendly in production process, and it can be used to recover waste asphalt mixture as much as possible. So the research has significant economic and environmental benefits. Different from the general research methods, In this paper, the dynamic parameters and fatigue properties of emulsified bitumen cold recycled mixture are studied by a combination of laboratory test and test road. The mixture ratio, optimum asphalt dosage and moisture content of cold recycled emulsified asphalt mixture were determined by rotating compaction method, and then the ratio of indoor test was used as the basis, and the optimum asphalt content and moisture content of the cold recycled emulsified asphalt mixture were determined. This paper introduces the paving process of the relevant test road sections (including the test road paving, field compaction, strength and so on), and finally carries out large-scale coring, beam extraction, splitting test, dynamic modulus test, and so on. On the basis of testing the field specimen, the difference of the performance between the indoor shaped specimen and the core sample obtained by the test road is compared and analyzed, based on the fatigue test and the dynamic tensile test. The pavement structure combination design based on cold recycled mixture is discussed. The optimum asphalt content of emulsified asphalt cold recycled mixture is 3.4 and the optimum moisture content is 3.5. The integral splitting strength of the core sample obtained from the test road is higher than that of the laboratory formed specimen, and by comparing the dynamic modulus of the core sample and the hot mix asphalt mixture of emulsified asphalt cold recycled mixture, it is found after the phase angle, The temperature sensitivity of cold recycled emulsified asphalt mixture is lower than that of hot mix asphalt mixture. The core samples obtained from cold regeneration test road of emulsified asphalt are higher in modulus, smaller in phase angle and higher in strength than those in laboratory. It is found that this kind of cold recycled asphalt mixture has the property of resisting reflection crack, the four point bending fatigue test is carried out on the accurate processing of the core sample of the test road, and the fatigue equation is obtained, and the calculation is carried out by BISAR software. It is concluded that the service life of the designed pavement is close to 5 million times, which can withstand the traffic load within the life span.
【學位授予單位】：山東建筑大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：U414

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本文編號：1586496