本文關(guān)鍵詞：重載長大縱坡瀝青穩(wěn)定碎石材料組成設計及路用性能研究　出處：《重慶交通大學》2014年碩士論文　論文類型：學位論文

  更多相關(guān)文章： 重載長大縱坡 瀝青穩(wěn)定碎石 石-石接觸度 抗剪強度 離析控制

【摘要】：高速公路重載長大縱坡路段應力應變分布規(guī)律較普通路段不同，對瀝青混合料抗高溫變形、抗疲勞及抗剪切能力要求更為嚴格。密級配瀝青穩(wěn)定碎石是骨架密實型混合料，具有良好的高溫抗車轍及抗剪切能力。本文結(jié)合甘肅省交通廳項目【甘交工(科研)2012年第03號】《黃土地區(qū)高速公路長大縱坡路段瀝青路面關(guān)鍵技術(shù)研究》，對重載長達縱坡路段瀝青穩(wěn)定碎石材料組成設計及路用性能進行深入研究。 本文采用Bisar3.0軟件進行路面結(jié)構(gòu)受力分析，研究重載長大縱坡路段下面層應力應變分布規(guī)律及拉應力、剪應力最大值。以規(guī)范中ATB-30級配范圍中值為中心，通過變化粗、細集料各級粒徑的含量，得到五種類型級配。采用基于比表面積和油膜厚度的特征因素模型法確定初始最佳瀝青用量；以石-石接觸度SSC(stone-on-stone contact)、動穩(wěn)定度及抗剪強度為評價指標，分析瀝青穩(wěn)定碎石混合料中粗集料和細集料不同比例對骨架結(jié)構(gòu)及抗剪強度的影響規(guī)律，提出適合于高速公路重載長大縱坡路段ATB-30粗集料界限，并優(yōu)選出三種級配；最后用旋轉(zhuǎn)壓實體積法確定最佳瀝青用量。對所優(yōu)選的三種級配瀝青穩(wěn)定碎石混合料進行高溫穩(wěn)定性，，低溫抗裂性，水穩(wěn)定性，疲勞性及抗剪性試驗，驗證其綜合路用性能，并與試驗路現(xiàn)場級配作對比分析。 以《公路瀝青路面施工技術(shù)規(guī)范》(JTGF40一2004)為依據(jù),結(jié)合甘肅省雷西高速公路長大縱坡路段現(xiàn)場試驗路及國內(nèi)外相關(guān)研究成果，對ATB-30混合料拌和、運輸、攤鋪、碾壓等環(huán)節(jié)離析控制措施及質(zhì)量控制進行研究。
[Abstract]:The distribution law of stress and strain in heavy duty long longitudinal slope section of expressway is different from that of common section, and the asphalt mixture is resistant to high temperature deformation. The requirements of fatigue resistance and shear resistance are more strict. Asphalt stabilized macadam with dense gradation is a dense matrix mixture. Good high temperature rutting resistance and shear resistance. This paper combined with Gansu Provincial Department of Communications Project [Gan Jiao Gong (Scientific Research)]. 2012 No. 03 "Research on key Technology of Asphalt pavement in long Longitudinal Slope Section of Expressway in Loess region". The composition design and road performance of asphalt stabilized macadam with heavy load and long longitudinal slope were studied. In this paper, the stress analysis of pavement structure is carried out by using Bisar3.0 software, and the distribution of stress and strain and tensile stress in the lower layer of heavy load long longitudinal slope section are studied. The maximum shear stress. Taking the median value of ATB-30 gradation range in the specification as the center, the content of coarse and fine aggregates at all levels was changed. Five types of gradation were obtained. The method of characteristic factor model based on specific surface area and oil film thickness was used to determine the initial optimum asphalt content. The dynamic stability and shear strength of stone contact degree SSC(stone-on-stone contactt were taken as the evaluation index. This paper analyzes the influence of coarse aggregate and fine aggregate on skeleton structure and shear strength in asphalt stabilized macadam mixture, and puts forward the ATB-30 coarse aggregate limit suitable for heavy load and long longitudinal slope section of expressway. And three kinds of gradation were selected. Finally, the optimal asphalt content was determined by the rotary compaction volume method. The high temperature stability, low temperature crack resistance, water stability, fatigue and shear resistance of the three graded asphalt stabilized macadam mixtures were tested. The comprehensive road performance was verified and compared with the field grading of the test road. Based on the Technical Specification for Highway Asphalt pavement Construction (JTGF40-2004), combined with the field test road of long longitudinal slope section of Luoxi Expressway in Gansu Province and related research results at home and abroad. The separation control measures and quality control of ATB-30 mixture mixing, transportation, spreading, rolling and so on are studied.
【學位授予單位】：重慶交通大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：U414

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