發(fā)布時間：2018-05-16 01:47

  本文選題：橡膠瀝青 + 彎曲試驗�。� 參考：《吉林大學》2015年碩士論文

【摘要】：瀝青混凝土路面的低溫開裂破壞，尤其在寒冷地區(qū)，是瀝青路面主要形式之一。我國北方地區(qū)冬季寒冷漫長，新鋪設的瀝青路面往往在通車很短時間后，路面就會出現分布較為規(guī)律的橫向裂縫。裂紋周圍是路面破壞的薄弱區(qū)域，雨水滲入后，不能及時排空，加劇凍漲、凍融發(fā)生，進而引發(fā)瀝青混合料的剝落、松散、坑洞等破壞問題，導致路面出現早期破壞，使得路面的實際使用壽命大幅低于設計壽命。 為解決路面的低溫開裂破壞，國內外的學者作了大量的研究。20世紀50年代，荷蘭學者Van del Poel提出了勁度模量的概念，作為時間和溫度的函數，能夠較好的反應作為典型粘彈性材料的瀝青的受力與變形的關系，一經提出便受到了道路工程界學者們的高度重視。 本文首先研究了橡膠瀝青的改性機理，通過室內試驗測試了橡膠瀝青的針入度、軟化點、彈性恢復、粘附性等基礎指標，，根據幾種基礎指標試驗對比90#基質瀝青和橡膠瀝青并對其低溫性能進行了分析研究。 其次，通過對勁度模量定義的研究，自行設計能夠測試瀝青及膠漿低溫勁度模量的三點彎曲試驗。對瀝青及膠漿小梁在不同低溫下的荷載、變形等數據進行了處理分析，研究分析了橡膠瀝青及膠漿的應變隨時間變化的規(guī)律、變形隨溫度變化的規(guī)律，并與90#基質瀝青及膠漿進行了對比分析。在研究瀝青及膠漿低溫受力與變形特性的基礎上，進一步研究了橡膠瀝青及膠漿低溫勁度模量隨時間和溫度的變化規(guī)律，同樣與90#基質瀝青及膠漿進行了對比分析。在試驗研究過程中還考慮不同摻量橡膠粉、載荷作用時間、環(huán)境溫度等因素對瀝青及膠漿的變形性能和勁度模量的影響。說明了溫度對于勁度模量的影響最為關鍵。 最后，通過不同低溫條件下的橡膠瀝青混合料劈裂試驗，對橡膠瀝青混合料的低溫性能進行了評估分析，分別研究了橡膠瀝青混合料的劈裂強度、破壞應變和破壞勁度模量隨溫度變化的規(guī)律，并與90#基質瀝青混合料進行了對比分析。同時，并采用瀝青勁度模量求取混合料勁度模量的H-K法對試驗所得瀝青混合料低溫勁度模量結果進行了對比評價，驗證了試驗方法的有效性。
[Abstract]:Low temperature cracking and damage of asphalt concrete pavement, especially in cold area, is one of the main forms of asphalt pavement. The winter is long and cold in the north of our country. After the new asphalt pavement is opened to traffic for a short time, the pavement will appear the transverse crack that distributes more regularly. There is a weak area of pavement damage around the crack. After Rain Water infiltration, it can not be emptied in time, which will aggravate the freezing and thawing, and lead to the spalling, loosening and pothole of asphalt mixture, which will lead to the early destruction of the pavement. The actual service life of pavement is much lower than that of design. In order to solve the low temperature cracking and failure of pavement, scholars at home and abroad have done a lot of research. In the 1950s, Dutch scholar Van del Poel put forward the concept of modulus of stiffness as a function of time and temperature. The relationship between stress and deformation of asphalt, which can be used as a typical viscoelastic material, has been attached great importance by road engineering scholars once it is put forward. In this paper, the modification mechanism of rubber asphalt was studied. The penetration, softening point, elastic recovery and adhesion of rubber asphalt were tested in laboratory. The low temperature properties of 90# base asphalt and rubber asphalt were studied and compared according to several basic indexes. Secondly, a three-point bending test is designed to measure the low temperature stiffness modulus of asphalt and mortar by studying the definition of the modulus of the degree of stiffness. The data of load and deformation of asphalt and mortar trabeculae at different low temperatures are processed and analyzed. The law of strain variation with time and deformation with temperature of rubber asphalt and mortar are studied and analyzed. The results were compared with 9 0# base asphalt and mortar. On the basis of studying the low temperature stress and deformation characteristics of asphalt and mortar, the variation of low temperature stiffness modulus of rubber asphalt and mortar with time and temperature is further studied, and also compared with 90# base asphalt and mortar. The effects of rubber powder, loading time and ambient temperature on the deformation properties and stiffness modulus of asphalt and mortar were also considered. The effect of temperature on modulus of stiffness is the most important. Finally, through the split test of rubber asphalt mixture under different low temperature conditions, the low temperature performance of rubber asphalt mixture is evaluated and analyzed, and the splitting strength of rubber asphalt mixture is studied respectively. The variation of failure strain and modulus of failure stiffness with temperature was compared with that of 90# base asphalt mixture. At the same time, the H-K method is used to calculate the stiffness modulus of asphalt mixture. The results of low temperature stiffness modulus of asphalt mixture are compared and evaluated, and the validity of the test method is verified.
【學位授予單位】：吉林大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：U414

【參考文獻】

相關期刊論文 前10條

1 董希斌;趙熙;;瀝青路面低溫開裂的影響因素分析[J];東北林業(yè)大學學報;2006年05期

2 沈金安;;瀝青與瀝青混合料的勁度模量[J];公路;1986年11期

3 郝培文,張登良;瀝青混合料低溫抗裂性能評價指標的研究[J];公路;2000年05期

4 趙延慶;吳劍;文健;;瀝青混合料動態(tài)模量及其主曲線的確定與分析[J];公路;2006年08期

5 李靜,袁建,郝培文,戴經梁,陳忠達;瀝青混合料低溫抗裂性能研究[J];公路交通科技;2005年04期

6 康愛紅;;活化廢膠粉改性瀝青機理研究[J];公路交通科技;2008年07期

7 宋小金;樊亮;申全軍;王林;;國產巖瀝青混合料動態(tài)模量研究[J];中外公路;2010年02期

8 彌海晨;胡苗;祁峰;郭平;;橡膠瀝青結合料對混合料高溫抗車轍性能的影響[J];中外公路;2011年01期

9 傅睿;魏琳;;高勁度模量瀝青混合料力學性能試驗研究[J];城市道橋與防洪;2012年05期

10 詹小麗;張肖寧;盧亮;;瀝青低溫粘彈性能的預測[J];吉林大學學報(工學版);2008年03期

相關博士學位論文 前1條

1 方向陽;某橡膠瀝青混凝土低溫性能評價研究[D];吉林大學;2011年

本文編號：1894914