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为提高催化油浆利用率,采用催化油浆先拔头再改性后与基质沥青调和的工艺制备道路沥青,研究了油浆改性工艺和调和工艺对沥青性能的影响。结果表明,兰炼油浆实沸点蒸馏在468℃的切割温度下得到的蒸馏残油收率为47. 4%,25℃针入度为128×10~(-1)mm;采用实验室自制改性剂A101,并对兰炼油浆蒸馏残油在不同改性缩合反应条件下获得的缩合油浆进行四组分分析,确定适宜的改性条件为:反应温度为230℃、反应时间为10 h。缩合油浆与高富AH-50沥青、高富AH-70沥青的质量比为2∶4∶4时,调和沥青样品各项性能均可满足AH-70沥青(A等级)的指标要求。 相似文献
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利用交联催化油浆和减压渣油为原料,将交联催化油浆减压蒸馏后得到的蒸馏残油与减压渣油进行调合,加入少量增延剂和PI改进剂制备70B道路沥青,为催化油浆综合利用探索了一条新途径。 相似文献
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本文对催化油浆以不同比例与减渣混合进行蒸馏的方法生产道路沥青进行了试验;结果表明,在催化油浆与减渣掺炼后所得的减压蒸馏残余物的各项指标均需要改善,在经过进一步氧化后各项指标均满足重交道路沥青的要求。在减渣油中掺兑适宜比例的催化油浆并控制一定氧化深度,可以生产出合格的重交道路沥青。 相似文献
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试验分别采用4种不同的工艺方法:减粘后渣油拔轻油后制道路沥青;减粘前和减粘后渣油按不同比例进行调和制道路沥青;减粘后渣油先拔轻油然后再与减粘后渣油调和制道路沥青;浅度氧化制备道路沥青。试验表明,4种方法都能得到合格的60#普通道路沥青,并且得到了较合适的工艺条件。 相似文献
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ANTHONY J. KRIECH LINDA V. OSBORN JOHN E. SNAWDER LARRY D. OLSEN ROBERT F. HERRICK JENNIFER M. CAVALLARI 《Polycyclic Aromatic Compounds》2013,33(4):243-269
Innovations in science may require crossing traditional boundaries between industry, unions, government, and academia. While such collaborations have the potential to be highly beneficial and productive, opportunities for such collaborations are often missed due to some of the inherent challenges. This collaborative research effort demonstrates an example of how a successful partnership can optimize the ability to answer complicated scientific questions. Specifically, these researchers collaborated to investigate inhalation and dermal exposures to polycyclic aromatic compounds and related urinary metabolites in hot-mix asphalt paving workers. Reported here are details of the partnership process used to create the study design, the review processes, and details of the analytical methodologies employed to help attain the study goals related to the identification of the nature, source, pathway, and biological relevance of exposure during hot-mix asphalt paving operations. The actual results of the study are being prepared for future publications. 相似文献
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