孤岛落地油泥制备改性沥青及其性能

Preparation and properties of modified asphalt from Gudao town ground oil sludge

以油田油泥与基质沥青为实验原材料,采用高速剪切方法制备油田油泥改性沥青,通过针入度、软化点、延度、运动黏度和离析软化点差等表征方法,研究孤岛落地油泥对沥青高低温性能、加工性能和储存稳定性的影响。结果表明:活性中间体与苯乙烯-丁二烯-苯乙烯嵌段共聚物(SBS)添加量(质量分数)分别为15%与4%时,孤岛落地油泥改性沥青的针入度比基质沥青降低0.4 mm,软化点比基质沥青提高24℃,运动黏度为0.28 Pa·s,离析软化点差(165℃,48 h)为0.3℃,其各项指标均同时满足橡胶沥青评价指标要求和SBS沥青评价指标要求;加入适量的油泥可提高沥青的低温抗裂性能,改善加工性能,而对沥青储存稳定性无明显影响。

Oil field sludge treatment is a great challenge for the whole world.In this study,oil field sludge and matrix asphalt were used as experimental raw materials,and oilfield modified asphalt was prepared by highspeed shearing method.The effects of the island ground sludge on the high and low temperature properties,processing properties and storage stability of the asphalt were studied by using the characterization methods such as penetration,softening point,ductility,kinematic viscosity and separation softening point difference.The results showed that when the additive amounts of active intermediates and styrene-butadiene-styrene block copolymers(SBS)were 15%and 4%(mass fraction,the same below),respectively,the penetration degree and softening point of oil field sludge modified asphalt were 0.4 mm lower and 24℃higher than matrix asphalt,respectively.The kinematic viscosity of the modified asphalt was 0.28 Pa·s,and the separation softening point difference(165℃,48 h)was 0.3℃.All the indexes could meet the requirements of the evaluation criterion of rubber asphalt and SBS asphalt.Adding proper amount of oil sludge could improve its crack resistance at low temperature and the process properties of asphalt,but had no significant influence on its storage stability.