發(fā)布時間：2018-06-22 21:54

  本文選題：瀝青混合料 + 再生劑　； 參考：《重慶交通大學》2015年碩士論文

【摘要】：隨著我國工業(yè)技術的發(fā)展,以及人們生活水平的提高,汽車擁有量陸續(xù)增加。這必將導致交通量和路面荷載的不斷增長,加之各種惡劣自然環(huán)境的影響,必然會導致瀝青路面老化程度的加深和老化速度的加快,最終使得瀝青路面會產(chǎn)生一些裂縫、坑洞等各種病害現(xiàn)象,對道路的路用性能產(chǎn)生嚴重的負面影響,嚴重影響路面行駛安全。我國早期修建的大量公路相繼進入了大修、改建、擴建階段。在此過程中必將產(chǎn)生大量的廢舊瀝青混合料,若不加以好好利用將造成資源浪費和環(huán)境污染。而應運而生的再生瀝青混合料技術能夠很好的解決這些問題,實現(xiàn)降低工程成本、節(jié)約大量砂石材料,可以產(chǎn)生巨大的經(jīng)濟效益和社會效益,同時符合低碳環(huán)保和可持續(xù)發(fā)展的要求,應當在我國進行大力推廣應用。本文在國內(nèi)外廢舊瀝青路面再生技術研究的基礎上,依托鄭州東四環(huán)公路改造項目,對公路進行現(xiàn)場取樣。通過對取樣的舊瀝青混合料進行室內(nèi)試驗分析,測定瀝青含量和三大指標以及組分分析,得出舊瀝青混合料的瀝青已經(jīng)嚴重老化以及集料出現(xiàn)了細化不再滿足技術規(guī)范要求;在此基礎上進一步分析舊瀝青的老化過程和再生機理,通過分析確定了選擇廠辦熱再生方式和再生劑最佳摻量;然后進行再生瀝青混混合料配合比設計,分別在不同舊料摻量下設計出合理的集料級配和最佳油石比;為驗證混合料再生效果和判斷出最佳的舊料摻配率,通過一系列室內(nèi)試驗分析再生瀝青混合料的力學性能、高溫性能、低溫性能、水穩(wěn)性能以及耐老化性能,分析得出再生瀝青混合料的各路用性能與普通瀝青混合料的路用性能差別并不大,其中力學性能和高溫性能甚至還由于普通瀝青混合料,只是低溫性能、水穩(wěn)性能和耐老化性能略低于普通瀝青混合料;最后通過綜合分析得出,再生瀝青混合料的各性能都與舊料摻配率和集料級配有密切關系,通過合理的級配設計和30%的舊料摻配率拌合的再生瀝青混合料各性能雖有所降低但都能滿足路面規(guī)范要求;可見,在今后道路維修改造工程中特別是在砂石材料貧乏的地區(qū)利用舊瀝青混合料再生技術,將有其重要的意義。
[Abstract]:With the development of industrial technology and the improvement of people's living standard in China, the number of cars is increasing one after another. This will inevitably lead to the continuous increase of traffic volume and pavement load, together with the impact of various adverse natural environment, will inevitably lead to the deepening of the aging degree of asphalt pavement and the acceleration of aging speed, which will eventually lead to some cracks on the asphalt pavement. Various diseases, such as potholes, have a serious negative impact on road performance and seriously affect road safety. China's early construction of a large number of highways have entered the major repair, reconstruction, expansion phase. In this process, a large number of waste asphalt mixture will be produced, if it is not properly utilized, it will cause waste of resources and environmental pollution. The technology of recycled asphalt mixture can solve these problems well, reduce the engineering cost, save a lot of sand and stone materials, and produce great economic and social benefits. In line with the requirements of low carbon environmental protection and sustainable development, it should be popularized and applied in China. Based on the research of recycling technology of waste asphalt pavement at home and abroad, based on the project of Zhengzhou East fourth Ring Road, this paper carries out site sampling of highway. Through the laboratory test and analysis of the old asphalt mixture, the asphalt content, the three indexes and the component analysis are determined. It is concluded that the asphalt of the old asphalt mixture has been seriously aged and the aggregate has been refined to no longer meet the requirements of the technical specifications. On this basis, the aging process and regeneration mechanism of old asphalt are further analyzed, through which the selection of heat regeneration method and the optimum amount of regenerative agent are determined, and then the mix ratio design of recycled asphalt mixture is carried out. In order to verify the effect of mixture regeneration and determine the best blending ratio of used materials, the mechanical properties of recycled asphalt mixture were analyzed through a series of laboratory tests. The properties of high temperature, low temperature, water stability and aging resistance are analyzed. It is concluded that the road performance of recycled asphalt mixture is not different from that of ordinary asphalt mixture. Among them, mechanical and high temperature properties are even due to ordinary asphalt mixture, which are only low temperature performance, water stability and aging resistance are slightly lower than those of ordinary asphalt mixture. Finally, through comprehensive analysis, it is concluded that, Each performance of recycled asphalt mixture is closely related to the admixture ratio of used materials and aggregate grade. The performance of recycled asphalt mixture which is mixed with reasonable gradation design and 30% blending ratio of old materials can meet the requirements of pavement specifications although it is reduced. It can be seen that it will be of great significance to use the old asphalt mixture recycling technology in the road maintenance and reconstruction project in the future, especially in the areas with poor sand and gravel materials.
【學位授予單位】：重慶交通大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：U414

【參考文獻】

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本文編號：2054344