發(fā)布時間：2018-03-04 03:04

  本文選題：再生瀝青路面　切入點：路用性能　出處：《重慶交通大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：瀝青路面在長期使用過程中,受到行車荷載和自然因素作用下,瀝青老化和集料細(xì)化逐漸使瀝青混合料使用性能下降,從而引起各種路面病害。我國的公路面臨著大量的維修養(yǎng)護(hù)任務(wù),為解決我國公路大中修過程中產(chǎn)生的大量廢棄舊瀝青混合料、節(jié)省資源消耗、保護(hù)生態(tài)環(huán)境,論文對廢舊瀝青混合料廠拌熱再生問題進(jìn)行了研究。本文依托成渝高速大修工程,對冷銑斍回收工藝的RAP級配變異性和再生瀝青混合料的路用性能影響因素進(jìn)行系統(tǒng)研究。論文首先通過對不同銑斍工藝下回收的RAP級配變異進(jìn)行分析,提出最佳的舊瀝青混合料銑斍方式。結(jié)合瀝青含量和級配變異性分析,對RAP進(jìn)行破碎、篩分、分檔處理,并驗證了RAP破碎、篩分對變異控制的效果。通過離心分離試驗、篩分試驗檢測回收瀝青路面材料中瀝青含量、瀝青老化分析和礦料級配等項目,綜合評價RAP性能。其次,針對瀝青路面不同層位對瀝青混合料的不同功能需求,對AC-20和ATB-25兩種級配在20%RAP摻量下進(jìn)行再生瀝青混合料配合比設(shè)計,確定了再生級配和最佳瀝青用量。通過試驗對RAP摻量、RAP粒徑、再生劑添加、再生工藝這四個因素對再生瀝青混合料高溫性能、水穩(wěn)性能和低溫性能影響分析。試驗結(jié)果表明:(1)隨著RAP摻量的增加再生瀝青混合料高溫性能增加、水穩(wěn)定性性能增加、低溫性能下降。(2)同一RAP摻量下,RAP粒徑對再生瀝青混合料性能的影響規(guī)律:在高溫性能上5~10mm10~16mm0~5mm;水穩(wěn)性能5~10mm0~5mm10~16mm;低溫性能0~5mm5~10mm10~16mm;綜合考慮在實際運用中優(yōu)先使用5~10mm檔RAP料。(3)再生劑的添加可以改善再生瀝青混合料的空隙率,但是會降低再生瀝青混合料的高溫和水穩(wěn)性能。(4)本文確定的室內(nèi)RAP再生瀝青混合料的工藝為:再生劑直接添加到預(yù)熱的RAP中,拌和時間為210s,RAP預(yù)熱溫度控制在110℃左右的拌和工作組合生產(chǎn)的再生瀝青混合料路用性能最佳。最后,對試驗路段進(jìn)行生產(chǎn)配合比設(shè)計并鋪筑試驗路,試驗路性能檢測滿足道路規(guī)范要求并對再生瀝青混合料的經(jīng)濟和社會效益進(jìn)行評價。
[Abstract]:Under the action of driving load and natural factors, asphalt aging and aggregate refinement gradually degrade the performance of asphalt mixture in the long service process of asphalt pavement. In order to solve the problem of a large number of abandoned old asphalt mixture produced in the course of highway maintenance in our country, save the consumption of resources and protect the ecological environment, the road in our country is faced with a large number of maintenance and maintenance tasks. In this paper, the problem of heat regeneration of waste asphalt mixture is studied. This paper relies on the Chengdu-Chongqing high speed overhaul project. The RAP gradation variability of cold milling and recovery process and the influencing factors of road performance of recycled asphalt mixture are systematically studied. Firstly, the variation of RAP gradation recovered under different milling and processing processes is analyzed. This paper puts forward the best milling method of old asphalt mixture. Combined with the analysis of asphalt content and gradation variability, the RAP is broken, sieved and graded, and the effect of RAP crushing and screening on the control of variation is verified. In order to evaluate the performance of RAP, the asphalt content, asphalt aging analysis and aggregate gradation of recovered asphalt pavement materials are tested by sieving test. Secondly, the different functional requirements of asphalt mixture for different layers of asphalt pavement are analyzed. The mixture ratio design of recycled asphalt mixture with 20% rap was carried out for AC-20 and ATB-25 gradation, and the reclaimed gradation and optimum asphalt content were determined. The influence of regeneration technology on the high temperature performance, water stability and low temperature performance of recycled asphalt mixture is analyzed. The experimental results show that with the increase of RAP content, the high temperature performance of recycled asphalt mixture increases, and the water stability of recycled asphalt mixture increases. The influence of Rap size on the performance of recycled Asphalt mixture under the same RAP content: 5 10 mm 10 mm 10 mm 10 mm 0 mm 0 mm in high temperature; 5 10 mm 10 mm 10 mm 10 mm 10 10 mm 16 mm in water stability; 0 5 mm 5 mm 5 mm 10 mm 10 mm 10 16 mm in low temperature; 5 mm 5 mm 5 mm 10 mm 10 mm 10 16 mm; 5 mm 10 mm RAP. The addition of agent can improve the porosity of recycled asphalt mixture. However, it will reduce the high temperature and water stability of recycled asphalt mixture.) the process of indoor RAP recycled asphalt mixture determined in this paper is as follows: the recycled agent is added directly to the preheated RAP, The road performance of recycled asphalt mixture produced by mixing and working combination controlled at 110 鈩，

本文編號：1563833