稳定型废旧橡塑高分子合金改性沥青性能预估模型研究

发布时间：2018-01-13 12:31

本文关键词：稳定型废旧橡塑高分子合金改性沥青性能预估模型研究　出处：《山东建筑大学》2017年硕士论文　论文类型：学位论文

【摘要】：近年来随着我国道路交通事业蓬勃发展以及汽车保有量的与日俱增,交通量日益增大,这导致相当一部分沥青路面在使用前期就出现了不同程度的病害,不仅给行车安全和舒适性带来了较大的隐患,还造成了巨大的经济损失。同时目前国内社会正面临着废旧轮胎和废旧塑料所带来的环境污染问题。本课题组借助特定的手段和方法熔融共混制备宏观均匀的稳定型废旧橡塑高分子合金改性剂,则可以制备出具有良好储藏稳定性的废旧橡塑高分子合金改性沥青,不仅提高了沥青的路用性能,还可以有效地解决废旧轮胎和废旧塑料所带来的“黑色污染”和“白色污染”问题。目前暂时缺乏对稳定型废旧橡塑高分子合金改性沥青性能系统的研究,本文通过室内试验方法建立基于改性剂掺量的稳定型废旧橡塑高分子合金改性沥青路用性能预估模型,来弥补这一方面的空白。首先,以橡塑改性沥青70℃粘度预估公式作为参考提出了描述稳定型废旧橡塑高分子合金改性沥青路用性能与改性剂掺量之间的关系式,用以建立高温、低温、疲劳及老化性能预估模型。其次,采用室内试验方法,基于针入度分级体系和Superpave沥青胶结料PG分级体系,分析了稳定型废旧橡塑高分子合金改性沥青路用性能,并计算了路用性能与改性剂掺量之间的线性关系。同时为了性能预估模型系数确定的需要,本文对稳定型橡胶改性沥青及某国产70#基质沥青相应的路用性能进行了分析。最后根据室内试验数据建立了稳定型废旧橡塑高分子合金改性沥青路用性能与改性剂掺量之间的关系模型,并对性能预估模型进行了验证。建立性能预估模型时采用的指标包括了针入度、软化点、60℃动力粘度、原样沥青车辙因子G*/sinδ、TFOT后沥青车辙因子G*/sinδ;10℃延度、蠕变劲度模量S值、斜率m值;疲劳因子G*sinδ;TFOT后针入度、软化点、60℃动力粘度、10℃延度;PAV后针入度、软化点。本文研究表明:稳定型废旧橡塑高分子合金改性沥青和稳定型橡胶改性沥青随着改性剂掺量的增加,高温、低温及疲劳性能均得到了改善;除10℃延度外,其余高温、低温及疲劳性能指标与改性剂掺量之间具有较好的线性关系,线性相关系数|R|介于0.9~1之间;表征稳定型废旧橡塑高分子合金改性沥青和稳定型橡胶改性沥青老化程度的指标(如针入度比)与改性剂掺量之间的线性关系较差,而短期老化和长期老化后残留沥青性能指标与改性剂掺量之间有较好的线性关系,除稳定型废旧橡塑高分子合金改性沥青10℃延度外,其他老化性能指标与改性剂掺量之间的线性相关系数|R|介于0.9~1之间;建立的稳定型废旧橡塑高分子合金改性沥青性能模型预估值和实测值相关性强,具有较好的可靠性和准确性。本文研究的目的是进一步推进稳定型废旧橡塑高分子合金改性沥青技术的发展和完善,建立的预估模型提供了一种进行稳定型废旧橡塑高分子合金改性沥青性能评价的定量方法,具有创新性和现实意义。
[Abstract]:In recent years, with the vigorous development of China's road traffic and car ownership grow with each passing day, the traffic volume is increasing, which leads to a considerable part of the asphalt pavement appeared different degrees of disease in early days, not only to the traffic safety and comfort brought great hidden trouble, also caused a great economic loss of environmental pollution. At the same time the problem at present is confronted with waste tires and waste plastics brought by our research group. The stable and specific method by means of melt blending preparation macrouniform waste rubber polymer alloy modifier, can be prepared by waste rubber polymer alloy has good storage stability of the modified asphalt, not only improve the asphalt pavement performance, but also can effectively solve the waste tires and waste plastics brought about by the "black pollution" and "white pollution" problem. For the moment The lack of research on the stability of waste rubber and plastic macromolecule alloy modified asphalt system performance, through the laboratory test method based on stable type of modifier content of waste rubber polymer alloy modified asphalt pavement performance prediction model, to make up the blank of this field. First, the rubber modified asphalt viscosity prediction formula of 70 DEG C as a reference is proposed to describe the stability of polymer alloy waste rubber modified asphalt road performance and the relationship between the content of modifier type, high temperature, with low temperature, fatigue and aging performance prediction model. Secondly, the indoor test method, penetration grading system and Superpave asphalt binder PG classification system based on stability analysis of waste rubber polymer alloy modified asphalt pavement performance, road performance and the linear relationship between the content of modifier is calculated. At the same time for the performance prediction model of coefficient To identify the needs of the stabilized rubber modified asphalt and 70# asphalt domestic corresponding pavement performance is analyzed. Finally, the relationship model of stable polymer alloy waste rubber modified asphalt road between the performance and the content of modifier is established according to the experimental data, and the performance prediction model verified. By establishing the performance prediction model of the indexes including penetration, softening point, dynamic viscosity is 60 DEG C, rut factor G*/sin Delta, TFOT rut factor G*/sin delta 10 DEG C; ductility, creep stiffness modulus S, inclined rate M; fatigue factor G*sin Delta TFOT needle; penetration, softening point, dynamic viscosity of 60 DEG, 10 DEG C ductility; after PAV penetration, softening point. This paper shows that: stable type waste rubber plastic polymer alloy modified asphalt and the stabilized rubber modified asphalt modifier with increasing dosage of high temperature, low temperature and fatigue Work performance are improved; the high temperature 10 DEG C, in addition to extend givers, has a good linear relationship between the temperature and the fatigue performance and the modifier content, between the linear correlation coefficient between 0.9~1 |R|; characterization of stable type waste rubber modified asphalt and polymer alloy stabilized rubber modified asphalt aging degree index (as the penetration ratio) and the content of modifier poor linear relationship, and has a good linear relationship between short-term and long-term aging residual asphalt after aging performance and modifier content, in addition to the stable polymer modified asphalt waste rubber alloy 10 degrees extension givers, among other aging performance and modification agent content of the linear correlation coefficient between 0.9~1 |R|; stable of waste rubber plastic polymer alloy modified asphalt performance prediction model and measured values of strong correlation, has good reliability and accuracy. The purpose of this study is to further promote the development of the technology of waste asphalt stabilized rubber modified polymer alloy and improve the established prediction model provides a stable evaluation of the performance of asphalt rubber waste polymer alloy modified by quantitative method, innovative and practical significance.

【学位授予单位】：山东建筑大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U414

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