基于消除H_2S排放的硫磺沥青添加剂的研究
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摘要
硫磺的加入虽然极大地改善了路面沥青的高低温机械性能和抗车辙性能,但是硫磺在与沥青高温共混搅拌过程中容易产生大量剧毒的硫化氢气体,这成为了该项技术大规模应用推广的巨大障碍。要解决硫化氢(H2S)过量排放的问题,必须从硫磺改性、沥青纳米改性和混合料改性等多方面入手。本研究首先从提高硫磺分子团高温结构与稳定性方面入手,利用烯烃类碳氢化合物对硫磺进行130℃时3h的加热改性,其后分别研究了不同添加量的普通硫磺(L)、改性硫磺(GL)以及SEAM对70号基质沥青延度、软化点和针入度的影响。三大指标的综合研究结果表明:GL沥青具有比L沥青和SEAM沥青更好的综合性能,并最终选择30%GL作为沥青改性的最佳添加比例,为进一步研制低H2S排放的硫磺沥青添加剂提供了物质基础。
Although the addition of sulfur can significantly improve the high and low temperature performance and anti-rutting performance of pavement asphalt,sulfur is prone to produce a large amount of poisonous gases of hydrogen sulfide(H_2S)during the mixing process with asphalt.This has become a huge obstacle to the large-scale application of the technology.To solve the problem of excessive H_2S emissions,sulfur modified,asphalt nano-modified and stone modification must be deal with.The paper is part of the sulfur modified to solve the H_2S emission.From the viewpoint of improving the high temperature structure and stability of sulfur molecules,the olefins are added to sulfur for modifying by heating at 130℃in 3 hours,The effects of ordinary sulfur(L),modified sulfur(GL)and SEAM on the ductility,softening point and penetration of 70#matrix asphalt are studied.The comprehensive study of the three major indicators of asphalt showed that GL has the best overall performance than L and SEAM and ultimately 30% GL as the best addition for asphalt modification,which provides a material basis for the further development of sulfur asphalt additives with low H_2S emissions.
Although the addition of sulfur can significantly improve the high and low temperature performance and anti-rutting performance of pavement asphalt,sulfur is prone to produce a large amount of poisonous gases of hydrogen sulfide(H_2S)during the mixing process with asphalt.This has become a huge obstacle to the large-scale application of the technology.To solve the problem of excessive H_2S emissions,sulfur modified,asphalt nano-modified and stone modification must be deal with.The paper is part of the sulfur modified to solve the H_2S emission.From the viewpoint of improving the high temperature structure and stability of sulfur molecules,the olefins are added to sulfur for modifying by heating at 130℃in 3 hours,The effects of ordinary sulfur(L),modified sulfur(GL)and SEAM on the ductility,softening point and penetration of 70#matrix asphalt are studied.The comprehensive study of the three major indicators of asphalt showed that GL has the best overall performance than L and SEAM and ultimately 30% GL as the best addition for asphalt modification,which provides a material basis for the further development of sulfur asphalt additives with low H_2S emissions.
引文
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[3]庞婵.硫磺沥青混合料路用能够研究[D].南宁:广西大学,2016.
[4]胡乐乐.硫磺沥青在道路工程中的应用研究[D].南京:东南大学,2015.
[5]岳贞菊.SEAM改性沥青的化学改性机理研究[D].重庆:重庆交通大学,2008.
[6]胡小弟,高一鸣,林丽蓉,等.赛欧铺改性沥青混合料温拌技术[J].武汉工程大学学报,2013,35(10):10-13.
[7]边祥芹,黄晓双,刘斌清.硫磺沥青混凝土路面技术在广西的应用前景分析[J].西部交通科技,2011,51(10):14-17.
[8]欧旭东.不溶性硫磺合成方法及生产工艺研究进展[J].广东化工,2009,36(7):97-100.
[9]孟昭,代军,赵世龙,等.一种沥青改性剂及其工业生产方法与应用[P].ZL201410373190 1.
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[11]JTG E20-2011公路工程沥青及沥青混合料试验规程[S].
[12]JTG F40-2004公路沥青路面施工技术规范[S].