多层共挤膜废料对SBS改性沥青性能的影响

Effects of Recycled Multilayer Co-extrusion Film Scraps on Properties of Styrene-Butadiene-Styrene(SBS)Modified Asphalt

以合新70号沥青为基质沥青、多层共挤膜废料(r-MCEFS)和SBS为改性剂、POE-g-GMA为相容剂,通过熔融共混法制备r-MCEFS/SBS复合改性沥青,并探讨r-MCEFS外掺量对复合改性沥青的常规性能、流变性能和微观结构的影响.结果表明:随着r-MCEFS外掺量的增加,复合改性沥青的车辙因子逐渐增加;当r-MCEFS外掺量为基质沥青质量的3%时,r-MCEFS/SBS复合改性沥青的针入度和软化点指标达到聚合物改性沥青SBS类(Ⅰ类)的I-D级别,且体系弹性回复能力最优.

Taking the Hexin No.70 asphalt as matrix, recycled multilayer co-extrusion film scraps（r- MCEFS） and styrene-butadiene-styrene（SBS） as modifier, POE-g-GMA as a compatibilizer, r-MCEFS/ SBS modified asphalt composites were prepared by melt blending. The classical performance, theological properties and microscopic structure of r-MCEFS/SBS modified asphalt composites with different contents of r-MCEFS were investigated. The results show that the rutting factor of r-MCEFS/SBS modified asphalt composites increases with the increase of r-MCEFS contents. With the addition of 3% of r-MCEFS（by mass of asphalt matrix）, r-MCEFS/SBS modified asphalt composites achieve the SBS polymer modified asphalt types（type T ） I-D level in the penetration and softening point index, and show the optimal elastic recovery ability.