新型玄武岩纤维对沥青混合料路用性能影响研究

发布时间：2018-03-21 03:53

本文选题：新型玄武岩纤维　切入点：拌合工艺　出处：《长安大学》2014年硕士论文　论文类型：学位论文

【摘要】：随着我国经济的迅速发展，我国公路建设也随之蓬勃发展，迅速形成了一个巨大的公路交通网，给人们的出行带来了方便。在人们享用其带来的便利的同时，公路病害也随之出现，车辙就是其中一个。车辙病害形成的机理以及防止的措施在本文都做了解释，并提出用一种新型玄武岩纤维提高沥青混合料的高温性能。研究表明纤维提高沥青混合料的高温稳定性能主要通过：1、纤维吸油增加沥青的粘度2、纤维对沥青混合料的加筋作用3、纤维在沥青混合料中形成空间网状结构起到桥接作用。试验检测结果和相关资料的数据表明：该种新型玄武岩纤维具有非常高的抗拉强度和比较高的吸油率。从而判定该种新型玄武岩纤维能提高沥青混合料的高温性能。通过室内试验确定新型玄武岩纤维对最佳沥青用量的影响、拌合工艺和纤维最佳掺量，得出合理的纤维沥青混合料的制备工艺。分析比较AC-16基质沥青混合料、添加0.3%新型玄武岩纤维AC-16基质沥青混合料、AC-16改性沥青混合料、添加0.4%普通玄武岩纤维SMA-13基质沥混合料、添加0.4%新型玄武岩纤维SMA-13基质沥青混合料、添加0.4%普通玄武岩纤维SMA-13改性沥青混合料、添加0.4%新型玄武岩纤维SMA-13改性沥青混合料的路用性能，验证新型玄武岩纤维对沥青混合料性能的改善效果。利用扫描电镜技术观察新型玄武岩纤维沥青混合料的内部结构从本质揭示纤维增强沥青混合料性能的机理；利用锥入度和软化两个试验分析纤维对沥青性能的影响；最后根据动稳定度、抗剪强度和软化点的试验结果，分析纤维对沥青与沥青混合料的性能影响的区别及联系。最后根据纤维对沥青混合料的高温性能影响和纤维自身的特征对不同纤维进行了综合评价。试验表明：该新型玄武岩纤维能很好的改善沥青混合料路用性能特别是高温性能。新型玄武岩纤维沥青混合料和SBS改性沥青混合料的高温性表现为：温度较低时改性沥青混合料稍好，高温时新型玄武岩纤维沥青混合料好。新型玄武岩纤维对沥青混合料的改善效果比普通玄武岩好。
[Abstract]:With the rapid development of our country's economy, the highway construction of our country has also developed vigorously, which has formed a huge highway transportation network quickly, which brings convenience to people's travel. While people enjoy the convenience brought by it, The formation mechanism of rutting disease and the preventive measures are explained in this paper, and a new type of basalt fiber is proposed to improve the high temperature performance of asphalt mixture. The results show that fiber can improve the high temperature stability of asphalt mixture mainly by 1: 1, oil absorption of fiber increases viscosity of asphalt 2, fiber reinforces asphalt mixture 3, fiber forms space network structure in asphalt mixture. Test results and related data show that this new type of basalt fiber has very high tensile strength and high oil absorption rate. It is concluded that the new type of basalt fiber can improve asphalt mixing. High temperature properties of compounding materials. The influence of new type basalt fiber on the optimum asphalt content, mixing process and fiber optimum content are determined through laboratory tests. The reasonable preparation technology of fiber asphalt mixture is obtained. The AC-16 matrix asphalt mixture is analyzed and compared. 0.3% new basalt fiber AC-16 matrix asphalt mixture, 0.4% ordinary basalt fiber SMA-13 matrix asphalt mixture, 0.4% new basalt fiber SMA-13 matrix asphalt mixture, The road performance of 0.4% ordinary basalt fiber SMA-13 modified asphalt mixture and 0.4% new basalt fiber SMA-13 modified asphalt mixture was added. The internal structure of new type basalt fiber asphalt mixture was observed by scanning electron microscope (SEM) to reveal the mechanism of fiber reinforced asphalt mixture performance. The influence of fiber on asphalt performance was analyzed by cone penetration and softening test. Finally, according to the test results of dynamic stability, shear strength and softening point, The difference and relation between fiber and asphalt mixture are analyzed. Finally, according to the influence of fiber on high temperature performance of asphalt mixture and the characteristics of fiber itself, the comprehensive evaluation of different fibers is carried out. The test results show that the new basalt fiber can improve the pavement performance of asphalt mixture, especially at high temperature. The high temperature performance of the new type basalt fiber asphalt mixture and SBS modified asphalt mixture is as follows: the temperature is relatively low. When the modified asphalt mixture is slightly better, The new type basalt fiber asphalt mixture is better than ordinary basalt asphalt mixture at high temperature.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U414

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