本文選題：冷再生技術(shù) + 乳化瀝青�。� 參考：《重慶交通大學(xué)》2015年碩士論文

【摘要】：隨著經(jīng)濟(jì)水平不斷提高,貴州省高速公路進(jìn)入了快速發(fā)展時期�？梢灶A(yù)計,省內(nèi)公路特別是重載道路大中修涉及的路面深度會明顯加大,舊料的處置和利用將成為大中修方案不可回避的問題。通過應(yīng)用瀝青路面冷再生技術(shù),將這些材料再次應(yīng)用到道路工程建設(shè)上,這樣不僅路用性能達(dá)到要求,不少能源和資源得到節(jié)約,還能使環(huán)境得到保護(hù),實現(xiàn)可持續(xù)發(fā)展。本文依托“山區(qū)高速公路瀝青路面冷再生技術(shù)體系的研究”項目,對乳化瀝青冷再生混合料技術(shù)性能進(jìn)行研究。對舊路歷史信息、路況及病害進(jìn)行調(diào)查和分析,獲得現(xiàn)場芯樣厚度和空隙率。對RAP性質(zhì)進(jìn)行試驗分析:測量RAP含水率,瀝青含量和性質(zhì),評價了RAP抽提后的級配。對瀝青路面再生技術(shù)分類進(jìn)行研究,分析各類技術(shù)的優(yōu)缺點;探討實際工程中再生方式的選擇;最后確定本路段選擇乳化瀝青冷再生進(jìn)行路面維修。從瀝青的組分和性質(zhì),老化和再生機(jī)理,乳化機(jī)理入手,研究乳化瀝青冷再生混合料工作原理。本文總結(jié)了國內(nèi)外冷再生路面結(jié)構(gòu)設(shè)計方法的異同,為本文結(jié)構(gòu)設(shè)計提供參考。對各種設(shè)計指標(biāo)進(jìn)行分析,并結(jié)合我國瀝青路面破壞狀況,將選擇再生層底拉應(yīng)力控制疲勞開裂和舊路頂面壓應(yīng)變控制永久變形,同時加入反映結(jié)構(gòu)剛度的彎沉指標(biāo)進(jìn)行路面設(shè)計。對冷再生路面厚度進(jìn)行研究,并通過BISAR軟件計算各種厚度組合在荷載作用下的力學(xué)反應(yīng)量,總結(jié)冷再生結(jié)構(gòu)層在不同回彈模量和厚度條件下,應(yīng)力、應(yīng)變和彎沉的變化規(guī)律,得出滿足各種交通等級的結(jié)構(gòu)層最小厚度,最后推薦了冷再生瀝青路面典型結(jié)構(gòu)。分析乳化瀝青冷再生社會效益和環(huán)保效益,其具有增加道路使用年限、對有關(guān)產(chǎn)業(yè)和地區(qū)經(jīng)濟(jì)帶來積極影響、減少材料費用、節(jié)約土地資源、避免水土流失和減少瀝青污染等優(yōu)點。如果從整個道路使用年限考慮,乳化瀝青冷再生基層能夠減少維修費用支出。通過本文研究,乳化瀝青冷再生混合料有著不錯的路用性能,應(yīng)用于基層或下面層時路面結(jié)構(gòu)有著很好的承載力。該項技術(shù)經(jīng)濟(jì)環(huán)保,在路面維修工程中有著廣闊的發(fā)展前景。
[Abstract]:With the continuous improvement of economic level, Guizhou Expressway has entered a period of rapid development. It can be predicted that the depth of the pavement involved in the overhauling of the highway, especially the heavy haul road, in the province will be obviously increased, and the disposal and utilization of used materials will become an unavoidable problem in the overhauling scheme. Through the application of cold recycling technology of asphalt pavement, these materials are again applied to road engineering construction, which not only meets the requirements of road performance, but also saves many energy and resources, and can also protect the environment and realize sustainable development. Based on the project of "Research on Cold Recycling Technology system of Asphalt pavement in mountainous area", the technical performance of emulsified bitumen cold recycled mixture is studied in this paper. The historical information, road condition and disease of the old road were investigated and analyzed, and the core sample thickness and void ratio were obtained. The properties of RAP were analyzed. The moisture content, asphalt content and properties of RAP were measured, and the gradation of RAP extraction was evaluated. The classification of asphalt pavement regeneration technology is studied, the advantages and disadvantages of various technologies are analyzed; the selection of regeneration methods in practical engineering is discussed; finally, the selection of emulsified asphalt cold recycling for pavement maintenance is determined. Starting with the composition and properties of asphalt, aging and regeneration mechanism and emulsifying mechanism, the working principle of cold recycled asphalt mixture is studied. This paper summarizes the similarities and differences of cold regenerated pavement structure design methods at home and abroad, and provides a reference for the structure design of this paper. Based on the analysis of various design indexes and combined with the failure situation of asphalt pavement in China, the tensile stress control fatigue cracking at the bottom of the regenerated layer and the compression strain on the top of the old road are selected to control the permanent deformation. At the same time, the deflection index reflecting the stiffness of the structure is added to the pavement design. In this paper, the thickness of cold recycled pavement is studied, and the mechanical reaction of various thickness combinations under load is calculated by BISAR software, and the variation law of stress, strain and deflection of cold regenerated structure layer under different elastic modulus and thickness is summarized. The minimum thickness of structure layer is obtained, and the typical structure of cold recycled asphalt pavement is recommended. This paper analyzes the social and environmental benefits of cold regeneration of emulsified asphalt, which has the advantages of increasing the service life of roads, bringing positive effects to the economy of related industries and regions, reducing the cost of materials and saving land resources. Avoid soil erosion and reduce asphalt pollution and other advantages. If considering the whole road life, emulsified asphalt cold recycling base can reduce the maintenance cost. Through the research in this paper, the emulsified asphalt cold recycled mixture has good road performance, and the pavement structure has good bearing capacity when it is applied to the base course or the lower layer. This technology is economical and environmental protection, and has broad development prospect in pavement maintenance engineering.
【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

【參考文獻(xiàn)】

相關(guān)碩士學(xué)位論文 前1條

1 尹萬輝;冷再生瀝青路面結(jié)構(gòu)設(shè)計方法研究[D];湖南大學(xué);2008年

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本文編號：1859108