【摘要】：瀝青路面再生技術(shù)的應(yīng)用,極大的減少了資源的浪費(fèi),具有很大的經(jīng)濟(jì)效益與社會(huì)效益。本論文依托新疆“低溫環(huán)境下大比例摻量廢舊瀝青混合料再生關(guān)鍵技術(shù)研究”開展研究,通過(guò)對(duì)舊瀝青混合料性能評(píng)價(jià)、混合料級(jí)配變異性控制以及舊瀝青再生性能的研究,分析舊瀝青混合料的再生性能,探究其再生效率,提出相應(yīng)的控制標(biāo)準(zhǔn)。第一,對(duì)依托新疆項(xiàng)目的舊路進(jìn)行實(shí)地調(diào)查,了解原路面的主要病害,以及病害成因。同時(shí)對(duì)項(xiàng)目所在地的水文氣候狀況進(jìn)行調(diào)查,為進(jìn)行廠拌熱再生做前期資料準(zhǔn)備。第二,對(duì)采用的新集料與舊瀝青混合料的各項(xiàng)指標(biāo)進(jìn)行檢測(cè)。本文結(jié)合舊瀝青混合料級(jí)配變異性分析,對(duì)原路面瀝青混合料進(jìn)行破碎與篩分,然后研究瀝青混合料分檔后的變異情況。通過(guò)研究混合料分為兩檔與三檔的級(jí)配變異情況,確定了最終的分檔。采用科學(xué)的計(jì)算方法得出各檔的摻配比例,使舊瀝青混合料得到了充分利用。第三,分析了新瀝青與再生劑對(duì)舊瀝青性能恢復(fù)的情況,在此基礎(chǔ)上確定了再生劑的種類與最佳摻量。通過(guò)舊瀝青與新瀝青溶合后再生瀝青的性能,模擬再生過(guò)程中新瀝青對(duì)舊瀝青的再生恢復(fù)情況。通過(guò)擬定不同的試驗(yàn)條件(拌合時(shí)間、舊料預(yù)熱溫度與是否添加再生劑)來(lái)進(jìn)行舊瀝青再生利用率的研究,分析了再生混合料中舊瀝青的利用程度,并且提出了舊料的最佳預(yù)熱溫度和拌合時(shí)間。結(jié)合舊瀝青再生利用率結(jié)果,進(jìn)行舊瀝青混合料瀝青膜的研究,分析新集料與舊集料表面瀝青膜的存在狀態(tài)。第四,根據(jù)新瀝青對(duì)舊瀝青的再生情況,找出能使再生瀝青混合料中舊瀝青性能恢復(fù)的最低新舊瀝青比,從而確定舊瀝青混合料的最大摻配比例。對(duì)比傳統(tǒng)瀝青混合料設(shè)計(jì)方法,本文采用新了設(shè)計(jì)方法來(lái)進(jìn)行再生瀝青混合料的配合比設(shè)計(jì),充分考慮了各分檔的瀝青含量以及舊瀝青的再生效率。以馬歇爾試驗(yàn)確定了最佳瀝青含量,測(cè)試了再生混合料的高溫穩(wěn)定性、水穩(wěn)性、低溫穩(wěn)定性。第五,進(jìn)行熱再生瀝青混合料經(jīng)濟(jì)性分析,結(jié)果表明瀝青路面再生技術(shù)的運(yùn)用,具有顯著的經(jīng)濟(jì)與社會(huì)效益。
[Abstract]:The application of asphalt pavement regeneration technology greatly reduces the waste of resources and has great economic and social benefits. In this paper, based on the "Research on key Technology of recycled Asphalt mixture with large proportion of waste Asphalt mixture in low temperature Environment" in Xinjiang, through the performance evaluation of old asphalt mixture, the control of mixture gradation variability and the research of recycled performance of old asphalt mixture. This paper analyzes the recycled performance of old asphalt mixture, probes into its recycling efficiency, and puts forward the corresponding control standard. First, carry on the field investigation to the old road that rely on the Xinjiang project, understand the main disease of the original road surface, as well as the cause of the disease. At the same time, the hydrological and climatic conditions of the site of the project were investigated to prepare the preliminary data for plant heating regeneration. Secondly, the indexes of new aggregate and old asphalt mixture are tested. Based on the analysis of gradation variability of old asphalt mixture, the original pavement asphalt mixture is broken and sifted, and the variation of asphalt mixture after grading is studied in this paper. The final gradation is determined by studying the gradation variation of mixture divided into two and three stages. By using scientific calculation method, the blending ratio of each grade is obtained, which makes full use of the old asphalt mixture. Thirdly, the performance recovery of new asphalt and regenerative agent to old asphalt is analyzed. On the basis of this, the types and optimal dosage of regenerating agent are determined. Through the performance of reclaimed asphalt after blending old asphalt with new asphalt, the regeneration recovery of old asphalt during regeneration process was simulated. By drawing up different test conditions (mixing time, preheating temperature of used materials and adding regenerating agent or not) to study the utilization ratio of old asphalt, the utilization degree of old asphalt in recycled mixture was analyzed. The optimum preheating temperature and mixing time of the used materials are also put forward. Based on the results of recycled utilization of old asphalt, the asphalt film of old asphalt mixture is studied, and the existing state of asphalt film on the surface of new aggregate and old aggregate is analyzed. Fourthly, according to the regeneration of old asphalt by new asphalt, we find out the lowest ratio of old and new asphalt which can restore the performance of old asphalt in recycled asphalt mixture, so as to determine the maximum mix proportion of old and old asphalt mixture. Compared with the traditional asphalt mixture design method, this paper adopts a new design method to design the mix ratio of recycled asphalt mixture, and fully considers the asphalt content of each grade and the recycling efficiency of old asphalt. The optimum asphalt content was determined by Marshall test, and the high temperature stability, water stability and low temperature stability of recycled mixture were tested. Fifth, the economic analysis of hot recycled asphalt mixture shows that the application of asphalt pavement recycling technology has remarkable economic and social benefits.
【學(xué)位授予單位】：重慶交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：U414

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本文編號(hào)：2173289