首页|脱硫胶粉复合SBS改性沥青的稳定化制备及其性能研究

脱硫胶粉复合SBS改性沥青的稳定化制备及其性能研究

扫码查看
胶粉改性沥青作为优良的沥青路面热熔型粘结剂虽已得到推广应用,但仍存在加工黏度高、储存稳定性差等问题.本研究以储存稳定性及流变性能为指标,采用低门尼高溶胶含量的脱硫胶粉,控制胶粉与苯乙烯-丁二烯-苯乙烯共聚物(SBS)复配比例,优化加工工艺,制备了稳定型脱硫胶粉复合SBS改性沥青.探究了其加工性能、高温抗变形能力、热稳定性及延展性.研究结果表明:(1)通过溶凝胶试验和计算发现,脱硫胶粉的溶胶含量大幅提升,可以有效改善胶粉与沥青间相容性.当脱硫胶粉复合SBS后,可以看出沥青的黏度大幅提升.从加工性能角度来说,需要合理地控制SBS的复合用量,以保证改性沥青的拌合流动性.(2)基于高温性能评价的试验结果,20%脱硫胶粉+2%SBS、25%脱硫胶粉+2%SBS组合均具有良好的高温性能.(3)通过离析试验测定了48 h软化点差,分析了不同温度下车辙因子及相位角变化,基于脱硫胶粉改性沥青的储存稳定性考虑,推荐25%脱硫胶粉复配2%SBS的改性沥青方案.(4)从延展性出发,最终选择25%脱硫胶粉复配2%SBS的改性沥青方案.
Stabilized preparation and properties of modified asphalt by desulfurized rubber powder composite SBS
Although rubber powder modified asphalt has been widely used as an excellent hot melt binder for asphalt pavement,there are still problems such as high processing viscosity and poor storage stability.In this study,focusing on the storage stability and rheological properties,using low Mooney and high sol content desulfurized rubber powder,controlling the composite ratio of rubber powder to styrene-butadiene-styrene copolymer(SBS),and optimizing the processing technology,desulfurized rubber powder composite SBS modified asphalt was prepared stably.Its processing performance,high-temperature deformation resistance,thermal stability,and ductility were explored.The research results showed that,(1)Through the sol-gel test and calculation,it was found that the sol content of desulfurized rubber powder was significantly increased,which could effectively improve the compatibility between rubber powder and asphalt.When desulfurized rubber powder was compounded with SBS,it could be seen that the viscosity of asphalt was significantly increased.From the perspective of processing performance,it was necessary to reasonably control the composite content of SBS to ensure the mixing flowability of modified asphalt.(2)Based on the test results of high-temperature performance evaluation,the combination of 20%desulfurized rubber powder+2%SBS and 25%desulfurized rubber powder+2%SBS both had good high-temperature performance.(3)The 48 hour softening point difference was determined through segregation test,and the changes in rutting factor and phase angle at different temperatures were analyzed.Based on the storage stability of desulfurized rubber powder modified asphalt,a modified asphalt scheme of 25%desulfurized rubber powder compounded with 2%SBS was recommended.(4)Starting from ductility,the modified asphalt scheme of 25%desulfurized rubber powder compounded with 2%SBS was ultimately chosen.

road engineeringrubberized asphaltrheological performancestabilitydesulfurized rubber powderSBS

景杰、路永春、吕弘煜、丁明强、王仕峰

展开 >

甘肃公航旅建设集团有限公司,甘肃 兰州 730099

甘肃公航旅低碳科技有限公司,甘肃 兰州 730099

上海交通大学化学化工学院,上海 200240

道路工程 橡胶沥青 流变性能 稳定性 脱硫胶粉 SBS

甘肃省科技重大专项计划

22YF11GA305

2024

中国胶粘剂
上海市合成树脂研究所 全国粘合剂信息站 中国胶粘剂和胶粘带工业协会

中国胶粘剂

CSTPCD
影响因子:0.522
ISSN:1004-2849
年,卷(期):2024.33(7)
  • 13