本文選題：界面粘附特性 + 表面能��； 參考：《哈爾濱工業(yè)大學》2015年碩士論文

【摘要】：瀝青與集料之間的粘附性在瀝青路面的高溫抗車轍、低溫抗裂、水損害乃至疲勞微裂紋的萌發(fā)等方面具有至關重要的作用,對路面的使用品質(zhì)與壽命,以及行車的安全性與舒適性也有一定影響。隨著表面能理論的發(fā)展與應用,其在研究瀝青與集料的粘附性、瀝青混合料的水損害等方面有著明顯的有效性與可行性。由于近幾年材料微觀研究的快速發(fā)展,AFM測試技術日趨成熟,并且在分析材料微觀物理力學性質(zhì)方面優(yōu)勢明顯。因此,本文以表面能理論為基本分析原理,采用AFM作為主要研究手段,通過微觀與宏觀相結合的方式研究瀝青與集料的粘附特性,以期為瀝青混合料的材料設計與耐久性評價提供一定的技術指導。首先,針對瀝青與集料試樣的特性,提出了適用于原子電力顯微鏡測試技術的試樣制備和試驗方法,并通過樣品測試數(shù)據(jù)穩(wěn)定性分析,驗證了試驗方法的有效性。其次,對不同油源、標號、老化狀態(tài)的瀝青和不同種類的集料開展了表面微觀構造測試。根據(jù)瀝青與集料的表觀形貌測試結果,定性的評價瀝青與集料的表面微觀構造特點。利用MATLAB區(qū)分瀝青表面特征結構,并結合SPSS統(tǒng)計分析結果與瀝青三維形貌圖分析瀝青表面微觀構造在老化前后的變化規(guī)律。結合瀝青在不同老化程度下的化學四組分變化規(guī)律,定量研究瀝青表面微觀構造的影響因素與形成原因。然后,在AFM不同測試模式下有針對地獲取集料與瀝青表面的力曲線,結合選定的表面能模型與相關計算理論,確定集料與瀝青表面各區(qū)域的表面能,并分析不同模型的適用性和可行性。將得到的表面能與常規(guī)座滴法的計算結果進行比較,分析新舊方法的差異來源。根據(jù)瀝青的微觀特征構造與化學組分信息,研究其與瀝青表面能之間的相關性,并分析表面能的影響因素。最后,將不同瀝青與不同集料進行宏觀拉拔試驗,從而評定瀝青與集料間的宏觀粘附力學特性。根據(jù)拉拔試驗結果,綜合分析瀝青與集料的表面能參數(shù)、表面微觀構造信息與宏觀粘附力學特性的相互聯(lián)系,進而在微觀層面上探討粘附性形成機理與改善粘附性的方法。根據(jù)研究成果,綜合擬定一套瀝青與集料粘附特性的預估與評價指標。
[Abstract]:The adhesion between asphalt and aggregate plays an important role in high temperature rutting resistance, low temperature crack resistance, water damage and fatigue microcrack germination of asphalt pavement. And the safety and comfort of driving also have a certain impact. With the development and application of surface energy theory, it is effective and feasible to study the adhesion between asphalt and aggregate and the water damage of asphalt mixture. Due to the rapid development of material microscopic research in recent years, AFM testing technology has become more and more mature, and it has obvious advantages in analyzing the microphysical and mechanical properties of materials. Therefore, based on the surface energy theory and AFM as the main research means, the adhesion between asphalt and aggregate is studied by the combination of micro and macro. In order to provide certain technical guidance for material design and durability evaluation of asphalt mixture. Firstly, according to the characteristics of asphalt and aggregate samples, a method of sample preparation and test is proposed, which is suitable for atomic power microscope (AEM) test technology. The validity of the test method is verified by the stability analysis of sample test data. Secondly, the surface microstructure of different oil sources, grades, aging state asphalt and different kinds of aggregates were tested. The surface microstructure of asphalt and aggregate is evaluated qualitatively according to the results of surface morphology test of asphalt and aggregate. The surface characteristic structure of asphalt was distinguished by MATLAB, and the change of surface microstructure of asphalt before and after aging was analyzed by combining the results of SPSS statistical analysis and three-dimensional topography of asphalt. Combined with the change rule of chemical four components of asphalt under different aging degree, the influencing factors and forming reasons of asphalt surface microstructure were studied quantitatively. Then, the force curves of aggregate and asphalt surface are obtained in different AFM test modes. Combined with the selected surface energy model and relevant calculation theory, the surface energy of each area of aggregate and asphalt surface is determined. The applicability and feasibility of different models are analyzed. The surface energy obtained is compared with the results obtained by the conventional method, and the source of the difference between the new and the old methods is analyzed. According to the microstructure and chemical component information of asphalt, the correlation between asphalt surface energy and surface energy was studied, and the influencing factors of surface energy were analyzed. Finally, macroscopical drawing tests of different bitumen and different aggregates are carried out to evaluate the macroscopic adhesion mechanical properties between asphalt and aggregate. According to the results of drawing test, the surface energy parameters of asphalt and aggregate, the relationship between surface microstructure information and macroscopic adhesion mechanical properties are analyzed synthetically, and the formation mechanism of adhesion and the methods to improve adhesion are discussed on the micro level. According to the research results, a set of prediction and evaluation indexes for the adhesion characteristics of asphalt and aggregate are drawn up synthetically.
【學位授予單位】：哈爾濱工業(yè)大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：U414

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本文編號：1937598