本文關鍵詞：新型羧基丁苯改性瀝青應用于道路路面的試驗研究　出處：《重慶大學》2014年碩士論文　論文類型：學位論文

  更多相關文章： 聚合物瀝青 混合料力學性能 疲勞性能

【摘要】：聚合物改性瀝青是近年來實驗和實踐在道路，特別是高速公路的建設方面，一直被關注的課題之一。由于聚合物的加入，改變了瀝青的性質(zhì)以及指標，如針入度，軟化點等，延度等，在一定程度上提高了瀝青的性能，使之更能適合復雜的使用環(huán)境和道路交通狀況，給國民經(jīng)濟建設做出了很大的貢獻。然而，在很多地方，高速公路在鋪筑不久就會出現(xiàn)道路裂縫，由于裂縫的存在，雨水的進入，提早導致了道路的破壞，嚴重影響交通順暢，，并且?guī)砹艘欢ǖ慕煌ò踩�。鑒于此，本文在之前的研究基礎上擬在石油瀝青中添加一種的新型的聚合物來改性瀝青，改善瀝青混合料的力學性能，特別是疲勞性能，希望能對解決道路裂縫提供一定的參考。在本文中，主要的探究內(nèi)容包括如下幾點： ①本文以重慶的高速公路為研究背景，選取適合重慶地區(qū)的石油瀝青為基質(zhì)瀝青，在此基礎上進行改性。 ②首先測試了基質(zhì)瀝青的針入度，軟化點和延度，以驗證基質(zhì)瀝青符合標準。之后設計出不同的聚合物添加比例，添加到基質(zhì)瀝青中進行改性，分別測試基質(zhì)瀝青以及添加不同比例聚合物的延度、針入度和軟化點，并加以比較，驗證不同比例的聚合物添加是否對基質(zhì)瀝青具有改善作用。 ③對聚合物瀝青做老化試驗，之后分別測試老化前后添加不同百分比的聚合瀝青的針入度，軟化點和延度，驗證添加不同百分比的聚合物改性瀝青是否符合要求，并選出合適的聚合物添加比例。 ④用老化試驗選出的聚合物添加比例制成聚合物改性瀝青，選擇合適的集料級配，制作瀝青混合料試件等，檢測瀝青混合料的物理、力學性能指標等，找出聚合物改性瀝青的最佳油石比。 ⑤對添加不同百分比的聚合物的瀝青以及基質(zhì)瀝青混合料做了疲勞試驗，驗證其是否對混合料有改良作用，能否滿足復雜的環(huán)境和路況需求，從而做出是否值得推廣的結(jié)論。 試驗結(jié)果表明，聚合物的加入對瀝青有一定的改性作用，提高了瀝青的軟化點，改善了高溫性能，針入度以及延度有了一定程度的下降；提高了混合料的抗車轍能力，提高了彎拉強度以及劈裂強度，在應力比較小時具有更好的疲勞性能等。
[Abstract]:Polymer modified asphalt has been one of the most important topics in recent years, especially in highway construction. Because of the addition of polymer, the properties and indexes of asphalt have been changed. Such as penetration, softening point, ductility and so on, to a certain extent, improve the performance of asphalt, make it more suitable for the complex use environment and road traffic conditions, and make a great contribution to the national economic construction. In many places, the highway will soon appear road cracks, due to the existence of cracks, Rain Water's entry, early lead to the destruction of the road, seriously affecting the smooth traffic. And bring certain traffic safety. In view of this, this paper proposed to add a new polymer to the asphalt to improve the mechanical properties of asphalt mixture. In particular, fatigue performance, I hope to provide a certain reference to solve road cracks. In this paper, the main content of exploration includes the following points: 1. Taking Chongqing expressway as the research background, this paper selects petroleum asphalt suitable for Chongqing as base asphalt, and then modifies it. Firstly, the penetration, softening point and ductility of the matrix asphalt were tested to verify that the matrix asphalt meets the standard. Then different polymer ratios were designed and added to the matrix asphalt for modification. The ductility, penetration and softening point of matrix asphalt and the addition of different proportion of polymer were tested and compared to verify whether the different proportion of polymer addition could improve the asphalt. 3Aging test of polymer asphalt, after which the penetration, softening point and ductility of polymerized asphalt were tested before and after aging. Verify that different percentage of polymer modified asphalt meet the requirements, and select the appropriate proportion of polymer. (4) Polymer modified asphalt was made by adding proportion of polymer selected by aging test, suitable aggregate gradation was selected, asphalt mixture specimen was made, physical and mechanical performance index of asphalt mixture was tested. To find out the best bitumen ratio of polymer modified asphalt. 5. The fatigue test of asphalt and matrix asphalt mixture with different percentage of polymer was carried out to verify whether it can improve the mixture and meet the needs of complex environment and road conditions. In order to draw a conclusion that is worth popularizing. The results show that the addition of polymer can improve the softening point of asphalt, improve the high temperature performance, and decrease the penetration and ductility to a certain extent. The rutting resistance of the mixture is improved, the flexural strength and splitting strength are improved, and the fatigue performance is better when the stress is low.
【學位授予單位】：重慶大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：U414

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