本文選題：廠拌冷再生技術(shù)　切入點：RAP　出處：《重慶交通大學(xué)》2015年碩士論文

【摘要】：近年來我國高速公路已開始從“大建設(shè)”逐步向“大養(yǎng)護”轉(zhuǎn)變,早期修建的高等級公路大部分已進入大、中修階段。一方面我國高速公路建設(shè)需要大量的瀝青材料,另一方面公路養(yǎng)護維修卻有大量舊瀝青廢棄掉。因此利用再生技術(shù)對廢舊瀝青材料進行再生利用在當(dāng)今這個自然資源極度匱乏的時代就顯得非常有意義。瀝青路面建成后的使用過程中,在各種因素的綜合作用下會發(fā)生一系列復(fù)雜不可逆的變化,路用性能逐漸降低,通常稱瀝青的“瀝青的老化”。瀝青路面再生就是通過再生工藝最大限度的降低老化過程對瀝青產(chǎn)生的不利影響,恢復(fù)舊瀝青固有的使用性能。廠拌冷再生技術(shù)憑著能夠改善多種路面病害的優(yōu)點在瀝青路面再生領(lǐng)域有廣泛的應(yīng)用。本文依托貴州省交通運輸廳科技項目——山區(qū)高速公路瀝青路面冷再生技術(shù)體系的研究,即G60(貴州境,貴新段)瀝青混凝土路面維修工程。在對該路段交通量、路面病害類型、養(yǎng)護狀況等的調(diào)查及對舊瀝青性能和集料級配評價的基礎(chǔ)上建立路面狀況評價模型,確定瀝青路面再生方案。利用瀝青抽提試驗和燃燒試驗將回收舊料中瀝青與集料徹底分離,發(fā)現(xiàn)不同路段、不同車道、不同路面結(jié)構(gòu)回收的舊瀝青的性質(zhì)是不同的,而且不同的回收工藝回收的舊料集料級配也不同,這種不同就是變異性。重點分析舊料中瀝青三大指標、瀝青含量及舊料集料級配的變異性產(chǎn)生原因,不同瀝青舊料回收源、不同路面結(jié)構(gòu)層和不同的回收工藝與舊料變異性的關(guān)系。RAP材料是冷再生瀝青混合料的主要原材料,所以RAP材料變異對再生瀝青混合料質(zhì)量有直接影響,進而影響到再生瀝青路面的路用性能。本文采用正交試驗分析RAP材料的變異對再生瀝青混合料的高溫、低溫、抗水損害等路用性能的影響規(guī)律,結(jié)果發(fā)現(xiàn)RAP材料中瀝青基本性質(zhì)、瀝青含量、集料級配這三因素的變異對再生瀝青混合料的路用性能影響程度大小順序:RAP材料瀝青性質(zhì)瀝青含量集料級配。最后提出合理的舊料RAP變異性控制措施,主要從舊料回收工藝、回收料分類、RAP材料預(yù)處理過程及冷再生施工過程等角度采取有效措施,控制舊料的變異,保證再生瀝青混合料質(zhì)量可靠和再生路面路用性能穩(wěn)定。
[Abstract]:In recent years, the expressway in our country has begun to change from "big construction" to "great maintenance". Most of the high grade highways built in the early period have entered the stage of large and medium repair. On the one hand, a large amount of asphalt materials are needed for highway construction in China. On the other hand, a large number of used asphalt is abandoned in highway maintenance and maintenance. Therefore, it is very meaningful to use recycling technology to recycle used asphalt materials in the age of extreme scarcity of natural resources. In the course of use after the completion of the facet, A series of complex irreversible changes will occur under the combined action of various factors, and the road performance will gradually decrease. Asphalt pavement regeneration is to minimize the adverse effects of the aging process on asphalt through the recycling process, which is commonly referred to as "asphalt aging". Restores the old asphalt inherent use performance. The factory mix cold regeneration technology has the widespread application in the asphalt pavement regeneration domain by the advantage which can improve many kinds of road surface diseases. This paper relies on Guizhou transportation department science and technology project-mountain area. Research on Cold Recycling Technology system of Expressway Asphalt pavement, That is, G60 asphalt concrete pavement maintenance engineering. Based on the investigation of traffic volume, pavement disease type, maintenance condition and evaluation of old asphalt performance and aggregate gradation, a pavement condition evaluation model is established. Using asphalt extraction test and combustion test to separate asphalt from aggregate completely, it is found that the properties of recovered old asphalt in different road sections, different lanes and different pavement structures are different. Moreover, the gradation of used aggregate recovered by different recovery processes is different, which is the variability. This paper mainly analyzes the three indexes of asphalt in used materials, the causes of asphalt content and the variability of old aggregate gradation, and the recovery sources of different asphalt used materials. The relationship between different pavement structure layer and different recovery process and the variability of used material. Rap is the main raw material of cold recycled asphalt mixture, so the variation of RAP material has a direct effect on the quality of recycled asphalt mixture. In this paper, orthogonal test is used to analyze the influence of the variation of RAP material on the pavement performance of recycled asphalt mixture, such as high temperature, low temperature, water damage and so on. The results showed that the basic properties of asphalt and the content of asphalt in RAP materials, The three factors of aggregate gradation influence the road performance of recycled asphalt mixture in order: asphalt content gradation of asphalt content of rap material. Finally, the reasonable RAP variability control measures are put forward, mainly from the recovery process of used materials. Effective measures should be taken to control the variation of old materials and ensure the reliable quality of recycled asphalt mixture and the stability of road performance of recycled asphalt pavement from the point of view of the pretreatment process of recycled rap material and the construction process of cold recycling.
【學(xué)位授予單位】：重慶交通大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：U414

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本文編號：1661848