本文選題：瀝青路面 + 馬歇爾試驗　； 參考：《重慶交通大學》2015年碩士論文

【摘要】：隨著我國交通運輸事業(yè)的快速發(fā)展,我國高速公路的發(fā)展速度也越來越快,尤其是瀝青混凝土路面作為高等級公路的主要路面結構形式,在高等級公路中的比例也越來越大。為解決瀝青路面過早出現(xiàn)破壞的現(xiàn)象,本文提出進行瀝青路面疲勞行為及材料疲勞參數(shù)方面的研究,把瀝青材料和組成路面結構的混凝土的疲勞行為作為本文的研究目標,并把荷載和溫度對瀝青混凝土路面結構產(chǎn)生的影響進行綜合分析,從而希望能對更為理想的瀝青路面設計方法的探討起到幫助作用。主要作了以下工作:①介紹瀝青路面疲勞理論,并總結出針對瀝青路面疲勞的幾種模型,包括現(xiàn)象學法、耗散能疲勞模型和斷裂力學疲勞模型。②馬歇爾法確定AC-25瀝青混凝土在滿足規(guī)范要求的前提下,確定三種不同的級配類型,其中把靠近規(guī)范下限的相對粗級配稱為Ⅰ型,把規(guī)范要求的上下限取平均值稱為Ⅱ型,相應的把接近規(guī)范上限的相對細級配稱為Ⅲ型。③對上述瀝青混合料試件進行劈裂強度試驗,給出未凍融和凍融一次劈裂強度試驗結果。④對AC-25Ⅰ型未凍融瀝青混合料試件進行在不同溫度、不同應力比,不同荷載條件下進行劈裂疲勞試驗;給出未凍融瀝青混合料的劈裂疲勞曲線和疲勞方程,包括雙對數(shù)和單對數(shù)兩種情況。⑤分析凍融對瀝青混凝土疲勞特性的影響。給出未經(jīng)凍融和經(jīng)過一次凍融后的AC-25Ⅰ型、Ⅱ型、Ⅲ型瀝青混凝土試樣疲勞曲線和疲勞方程,包括雙對數(shù)和單對數(shù)兩種情況。⑥分析有無凍融環(huán)境下,瀝青混凝土所表現(xiàn)出的疲勞特性有和差別。⑦分析溫度是如何影響瀝青混凝土的疲勞特性的。試驗所得到的AC-25Ⅰ型瀝青混凝土劈裂強度隨溫度的升高而降低。并以AC-25Ⅰ型瀝青混凝土為例,分析溫度對其疲勞特征參數(shù)n和k產(chǎn)生怎樣的影響規(guī)律進行分析。⑧對瀝青混凝土產(chǎn)生疲勞破壞的機理進行研究分析。⑨對影響瀝青混凝土的疲勞性能的相關因素進行總結。并分外部因素以及內部因素進行詳細闡述。通過以上的研究工作,對于研究瀝青混凝土在不同荷載、不同溫度及有無凍融條件下的疲勞特性具有重要意義。
[Abstract]:With the rapid development of traffic and transportation in China, the speed of highway development in China is getting faster and faster, especially the asphalt concrete pavement as the main pavement structure form of high-grade highway, the proportion in high-grade highway is also increasing. In order to solve the problem of premature failure of asphalt pavement, the fatigue behavior of asphalt pavement and fatigue parameters of asphalt pavement are studied in this paper, and the fatigue behavior of asphalt material and concrete composed of pavement structure is regarded as the research goal of this paper. The influence of load and temperature on asphalt pavement structure is analyzed synthetically so as to be helpful to the discussion of more ideal asphalt pavement design method. This paper mainly introduces the theory of asphalt pavement fatigue, and summarizes several models aiming at asphalt pavement fatigue, including phenomenological method. The dissipative energy fatigue model and fracture mechanics fatigue model .2 Marshall method are used to determine three different gradation types of AC-25 asphalt concrete, and the relative coarse gradation close to the lower limit of the specification is called type I, on the premise of satisfying the requirements of the specification, three different gradation types are determined. The average value of the upper and lower limit required by the specification is called type 鈪，

本文編號：1823311