脱油沥青路用性能研究
发布时间：2019-01-12 14:17
【摘要】：随着我国国民经济的飞速发展,全国的高速公路网进入了快轨道建设期。与此同时,对道路沥青的数量与质量也提出了更高的要求,为了解决沥青路面在使用过程中经常出现的质量问题,减少道路病害,向沥青中添加改性剂已成为了一种重要的手段。但经济成本的问题也会随之而来。随着石化行业对炼油要求的不断提高,在渣油溶剂脱沥青的过程中,产生了脱油沥青(DOA)副产品。此副产品不仅生产规模较大,而且经济成本相对廉价,若部分或全部取代改性剂,则可以降低改性沥青的成本,国内对其使用尚未有系统的研究。本文在总结脱油沥青(DOA)基本性质和特征的基础上,通过荧光显微照相、聚合物改性沥青相态结构分析、改性沥青制备混合等手段,对同一型号SBS改性剂、不同型号DOA与同一基质沥青配制的改性沥青样品,进行了显微观测,同时对其不同时段的相态结构进行了照片拍摄,并结合微观观测结果与改性沥青离析试验结果,对改性沥青的相态结构与其存储稳定性之间的关系进行了研究。研究表明,分析改性沥青制备过程中聚合物改性剂的存在相态,可为改性沥青制备温度、时间等提供依据;聚合物改性剂在沥青中越容易混合、粒径越小,所得的改性沥青的稳定性越好。研究过程中,对不同DOA掺量的混合沥青、不同DOA和SBS改性剂掺量复配的混合沥青以及SBS改性沥青进行常规实验、P-G分级实验。实验结果表明,一定范围内掺量DOA有利于提高沥青高温性能,而沥青的低温延性有所下降。同时,对上述不同混合沥青,取用重庆三环高速公路铜梁至合川段路面工程项目中面层沥青混合料生产配合比,对其进行沥青混合料的高温、低温及水稳定性实验。实验结果表明,加入一定量的DOA后,可以与完全掺入SBS改性剂后的改性沥青混合料的性能要求相一致,即可部分取代SBS改性剂,DOA与SBS改性剂复配时的适宜掺量为10%的DOA和2%的SBS改性剂。最后,通过技术经济分析得知,在基质沥青中掺配10%DOA和2%SBS改性剂后,每吨沥青的价格比在基质沥青中掺入4%SBS改性剂(不考虑其中加入稳定剂等)便宜488元,其经济性相当可观。
[Abstract]:With the rapid development of national economy, the national highway network has entered the period of fast track construction. At the same time, the quantity and quality of road asphalt are also put forward higher requirements, in order to solve the quality problems that often appear in the course of using asphalt pavement, reduce the road disease, Adding modifiers to asphalt has become an important means. But the question of economic costs will follow. With the increasing requirement of oil refining in petrochemical industry, (DOA) by-product of deasphalting is produced in residual oil solvent deasphalting process. This by-product is not only large in scale, but also relatively cheap in economic cost. If the modifier is partially or completely replaced, the cost of modified asphalt can be reduced, but there is no systematic study on its use in China. On the basis of summarizing the basic properties and characteristics of deoiled asphalt (DOA), by means of fluorescence microphotography, phase structure analysis of polymer modified asphalt and preparation and mixing of modified bitumen, the SBS modifier of the same type was studied in this paper. The samples of modified asphalt prepared by different types of DOA and the same base asphalt were observed microscopically, and the phase structure of the modified asphalt at different time periods was photographed, and the results of microcosmic observation were combined with the results of segregation test of modified asphalt. The relationship between phase structure and storage stability of modified asphalt was studied. The results show that the analysis of the phase behavior of polymer modifiers in the preparation of modified asphalt can provide the basis for the preparation temperature and time of modified asphalt. The easier the polymer modifier is mixed in the asphalt, the smaller the particle size is, and the better the stability of the modified asphalt is. In the course of the study, conventional experiments and P-G classification experiments were carried out on mixed asphalt with different DOA content, mixed asphalt with different DOA and SBS modifier and SBS modified asphalt. The experimental results show that the addition of DOA in a certain range can improve the high temperature performance of asphalt, while the low temperature ductility of asphalt decreases. At the same time, the mixture ratio of asphalt mixture of middle surface layer in the pavement engineering project from Tongliang to Hechuan section of Chongqing Sanhuan Expressway was used to test the high temperature, low temperature and water stability of asphalt mixture. The experimental results show that the addition of a certain amount of DOA can meet the performance requirements of the modified asphalt mixture after the SBS modifier is completely added, and can partially replace the SBS modifier. When DOA is mixed with SBS modifier, the suitable dosage of DOA and SBS is 10% and 2%, respectively. Finally, through the technical and economic analysis, it is found that the price per ton of bitumen is 488 yuan cheaper than that of adding 4%SBS modifier (not considering the addition of stabilizer, etc.) to the base asphalt after adding 10%DOA and 2%SBS modifier to the base asphalt. Its economy is considerable.
【学位授予单位】：重庆交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U414
本文编号：2407873
[Abstract]:With the rapid development of national economy, the national highway network has entered the period of fast track construction. At the same time, the quantity and quality of road asphalt are also put forward higher requirements, in order to solve the quality problems that often appear in the course of using asphalt pavement, reduce the road disease, Adding modifiers to asphalt has become an important means. But the question of economic costs will follow. With the increasing requirement of oil refining in petrochemical industry, (DOA) by-product of deasphalting is produced in residual oil solvent deasphalting process. This by-product is not only large in scale, but also relatively cheap in economic cost. If the modifier is partially or completely replaced, the cost of modified asphalt can be reduced, but there is no systematic study on its use in China. On the basis of summarizing the basic properties and characteristics of deoiled asphalt (DOA), by means of fluorescence microphotography, phase structure analysis of polymer modified asphalt and preparation and mixing of modified bitumen, the SBS modifier of the same type was studied in this paper. The samples of modified asphalt prepared by different types of DOA and the same base asphalt were observed microscopically, and the phase structure of the modified asphalt at different time periods was photographed, and the results of microcosmic observation were combined with the results of segregation test of modified asphalt. The relationship between phase structure and storage stability of modified asphalt was studied. The results show that the analysis of the phase behavior of polymer modifiers in the preparation of modified asphalt can provide the basis for the preparation temperature and time of modified asphalt. The easier the polymer modifier is mixed in the asphalt, the smaller the particle size is, and the better the stability of the modified asphalt is. In the course of the study, conventional experiments and P-G classification experiments were carried out on mixed asphalt with different DOA content, mixed asphalt with different DOA and SBS modifier and SBS modified asphalt. The experimental results show that the addition of DOA in a certain range can improve the high temperature performance of asphalt, while the low temperature ductility of asphalt decreases. At the same time, the mixture ratio of asphalt mixture of middle surface layer in the pavement engineering project from Tongliang to Hechuan section of Chongqing Sanhuan Expressway was used to test the high temperature, low temperature and water stability of asphalt mixture. The experimental results show that the addition of a certain amount of DOA can meet the performance requirements of the modified asphalt mixture after the SBS modifier is completely added, and can partially replace the SBS modifier. When DOA is mixed with SBS modifier, the suitable dosage of DOA and SBS is 10% and 2%, respectively. Finally, through the technical and economic analysis, it is found that the price per ton of bitumen is 488 yuan cheaper than that of adding 4%SBS modifier (not considering the addition of stabilizer, etc.) to the base asphalt after adding 10%DOA and 2%SBS modifier to the base asphalt. Its economy is considerable.
【学位授予单位】：重庆交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U414
【参考文献】
相关期刊论文 前2条
1 黄卫东,孙立军;聚合物改性沥青显微结构及量化研究[J];公路交通科技;2002年03期
2 余剑英，，孔宪明，薛理辉;聚合物改性沥青微观结构与性能关系的研究[J];武汉工业大学学报;1995年01期
本文编号：2407873
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