本文關(guān)鍵詞： 道路工程 玄武巖纖維 低噪聲路面 機(jī)理研究 路用性能　出處：《長安大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：目前，我國有關(guān)玄武巖改性瀝青混合料的研究起步較晚，將其應(yīng)用于開級配降噪瀝青混合料中更是鮮有報(bào)道，其眾多性能有待進(jìn)一步的研究和驗(yàn)證�；诖�，本文通過正交試驗(yàn)及駐波管試驗(yàn)，對比分析了不同影響因素對開級配瀝青混合料降噪性能的影響規(guī)律，基于針入度試驗(yàn)、軟化點(diǎn)試驗(yàn)、延度試驗(yàn)、彈性恢復(fù)試驗(yàn)以及表觀粘度試驗(yàn)，揭示了玄武巖纖維與瀝青的作用機(jī)理，同時(shí)系統(tǒng)研究了纖維摻量對開級配瀝青混合料路用性能的影響規(guī)律，并提出了玄武巖纖維改性瀝青混合料的施工工藝。 1、采用正交試驗(yàn)方法，，理論分析了四種參數(shù)對開級配瀝青混合料降噪特性的影響，結(jié)果表明空隙率對瀝青混合料降噪性能影響最為主要，且隨著路面厚度的增加，降噪效果趨于穩(wěn)定，在實(shí)際應(yīng)用過程中開級配瀝青混合料的面層結(jié)構(gòu)厚度可控制在4cm。 2、玄武巖纖維改性瀝青試驗(yàn)結(jié)果顯示，隨著摻量的增加，改性瀝青的針入度、延度逐漸減小，軟化點(diǎn)、彈性恢復(fù)、粘度隨著纖維摻量的增加而增大。針入度、軟化點(diǎn)、彈性恢復(fù)和粘度在玄武巖纖維摻量為0.2%~0.3%時(shí)接近高黏瀝青的相應(yīng)值，玄武巖纖維可有效改善瀝青膠漿的高溫性能、疲勞性能和抗水損壞性能。 3、對玄武巖纖維膠漿的機(jī)理分析可知，主要為纖維對瀝青中輕質(zhì)油分的吸附致使膠體結(jié)構(gòu)的轉(zhuǎn)變和纖維比表面積的增加和瀝青發(fā)生了界面的相互作用，提高了D結(jié)構(gòu)瀝青的比例，再者纖維的加入對瀝青膠漿起到了D加筋作用，增強(qiáng)了瀝青膠漿的結(jié)構(gòu)整體性。 4、在大孔隙開級配混合料中加入消石灰后，混合料的抗水損壞性能得到有效提高，并從材料的微觀進(jìn)行了機(jī)理分析。 5、玄武巖纖維可顯著提高開級配瀝青混合料的路用性能，但卻降低了混合料的滲水、構(gòu)造深度和降噪功能。從綜合本研究的出發(fā)點(diǎn)低噪聲路面和玄武巖纖維強(qiáng)化混合料性能兩點(diǎn)考慮，玄武巖纖維的最佳摻量定為0.3%。
[Abstract]:At present, the research of basalt modified asphalt mixture started late in our country, and its application in open grading and noise reduction asphalt mixture is rarely reported, and many of its properties need to be further studied and verified. Through orthogonal test and standing wave tube test, this paper compares and analyzes the influence of different factors on the noise reduction performance of open-graded asphalt mixture, based on penetration test, softening point test, ductility test. Elastic recovery test and apparent viscosity test reveal the mechanism of basalt fiber and asphalt. At the same time the influence of fiber content on pavement performance of open-graded asphalt mixture is systematically studied. The construction technology of basalt fiber modified asphalt mixture is put forward. 1. The effects of four parameters on the noise reduction characteristics of open graded asphalt mixture are theoretically analyzed by orthogonal test. The results show that void ratio has the most important effect on the noise reduction performance of asphalt mixture. With the increase of pavement thickness, the noise reduction effect tends to be stable, and the thickness of pavement structure of open graded asphalt mixture can be controlled at 4cm in practical application. 2. The experimental results of basalt fiber modified asphalt show that the penetration and ductility of modified asphalt decrease gradually, the softening point and elastic recovery gradually decrease with the increase of the content of the modified asphalt. The viscosity increases with the increase of fiber content. The penetration, softening point, elastic recovery and viscosity are close to the corresponding value of high viscosity asphalt when the content of basalt fiber is 0.2-0.3. Basalt fiber can effectively improve the high temperature performance, fatigue performance and water damage resistance of asphalt mortar. 3. By analyzing the mechanism of basalt fiber slurry, it is known that the adsorption of fiber to light oil in asphalt leads to the transformation of colloidal structure, the increase of fiber specific surface area and the interfacial interaction of asphalt. The ratio of D structure asphalt is increased, and the addition of fiber plays a role of D reinforcement on asphalt mortar, and enhances the structural integrity of asphalt mortar. 4After adding quicklime to the mixture with macroporous gradation, the resistance to water damage of the mixture is improved effectively, and the mechanism of the mixture is analyzed from the microscopic point of view. 5. Basalt fiber can improve the pavement performance of asphalt mixture, but it can reduce the seepage of asphalt mixture. Structural depth and noise reduction function. Considering the performance of low noise pavement and basalt fiber reinforced mixture, the optimum content of basalt fiber is 0.3.
【學(xué)位授予單位】：長安大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：U414;U416.217

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