硬质沥青颗粒成型相关技术研究
发布时间：2019-01-18 16:40
【摘要】：以硬质沥青为代表,研究探索了沥青颗粒化成型相关技术,并确定了工艺参数。钢带冷凝造粒法作为熔融造粒法的典型代表,适用于沥青类物质的颗粒化成型。针对成型后沥青颗粒在高温下彼此黏结的问题,采取隔离措施防止黏结。PEG和PVC作为不同裹覆方式的典型代表,可作为隔离材料防止沥青颗粒的黏结。裹覆PEG和PVC的硬质沥青颗粒可在50℃环境下保持颗粒良好。此外考察了隔离材料对硬质沥青微观性能的影响,结果显示:硬质沥青中相对低的饱和分与芳香分含量使得PEG和PVC难于在硬质沥青内分散均匀。FTIR结果显示,醚基的出现显示PEG对硬质沥青进行了化学改性,而PVC未对硬质沥青进行化学改性。本研究的沥青颗粒成型工艺和隔离措施可应用到基质和改性沥青的颗粒成型,实现沥青材料的冷运输。
[Abstract]:On the basis of hard asphalt, the related technology of asphalt granulation was studied and the process parameters were determined. The steel strip condensation and granulation method is used as a typical representative of the melt-granulation method, and is suitable for the granulation forming of the asphalt material. In the light of the problems that the asphalt particles are bonded to each other at high temperature, the isolation measures are adopted to prevent the bonding. PEG and PVC, as a typical representative of different coating methods, can be used as an isolation material to prevent the bonding of the asphalt particles. The hard asphalt particles coated with PEG and PVC can keep the particles well under the environment of 50 DEG C. The effect of the isolation materials on the microstructure of the hard asphalt was also investigated. The results showed that the relatively low saturated and aromatic content in the hard asphalt made it difficult to disperse the PEG and PVC in the hard asphalt. The FTIR results show that the presence of the ether group shows that the PEG has the chemical modification to the hard asphalt, and the PVC does not chemically modify the hard asphalt. The technology and the isolation measures of the asphalt particle in this study can be applied to the particle formation of the matrix and the modified asphalt to realize the cold transport of the asphalt material.
【作者单位】： 山西省交通科学研究院;新型道路材料国家地方联合工程试验室;
【基金】：山西省交通运输厅科技计划项目,项目编号2016-1-27,2017-1-26 山西省基础研究项目,项目编号2015021074 山西省科技成果转化引导专项,项目编号201604D121017
【分类号】：U414
本文编号：2410904
[Abstract]:On the basis of hard asphalt, the related technology of asphalt granulation was studied and the process parameters were determined. The steel strip condensation and granulation method is used as a typical representative of the melt-granulation method, and is suitable for the granulation forming of the asphalt material. In the light of the problems that the asphalt particles are bonded to each other at high temperature, the isolation measures are adopted to prevent the bonding. PEG and PVC, as a typical representative of different coating methods, can be used as an isolation material to prevent the bonding of the asphalt particles. The hard asphalt particles coated with PEG and PVC can keep the particles well under the environment of 50 DEG C. The effect of the isolation materials on the microstructure of the hard asphalt was also investigated. The results showed that the relatively low saturated and aromatic content in the hard asphalt made it difficult to disperse the PEG and PVC in the hard asphalt. The FTIR results show that the presence of the ether group shows that the PEG has the chemical modification to the hard asphalt, and the PVC does not chemically modify the hard asphalt. The technology and the isolation measures of the asphalt particle in this study can be applied to the particle formation of the matrix and the modified asphalt to realize the cold transport of the asphalt material.
【作者单位】： 山西省交通科学研究院;新型道路材料国家地方联合工程试验室;
【基金】：山西省交通运输厅科技计划项目,项目编号2016-1-27,2017-1-26 山西省基础研究项目,项目编号2015021074 山西省科技成果转化引导专项,项目编号201604D121017
【分类号】：U414
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