多层共挤膜废料改性沥青的微观结构和流变性能

Microstructure and Rheological Behavior of Recycled Multilayer Co-extrusion Film Scraps Modified Asphalt

采用多层共挤膜废料(r-MCEFS)对重交70#沥青进行改性制备r-MCEFS改性沥青。探讨了r-MCEFS用量对改性沥青的常规性能、微观结构和流变性能的影响。结果表明,随着r-MCEFS用量的增加,基质沥青的软化点逐渐上升;当r-MCEFS用量增加到4份(质量份数,下同)后,改性沥青的相形态由"海-岛"结构逐渐转变为"类网络"结构;随着r-MCEFS用量的增加,改性沥青的回弹模量和高温稳定性得到改善,r-MCEFS与沥青基质的界面作用增强。

The recycled co-extrusion multilayer film scraps(r-MCEFS)were employed to modify asphalt(heavy traffic 70#).The effect of r-MCEFS dosage on the general performances,microstructure,and rheological property of the modified asphalt were investigated.It showed that the softening point of the modified asphalt increased with increasing r-MCEFS content.The microstructure of the modified asphalt converted from the'sea-island'into the'web-like'structure at 4phr r-MCEFS content.The elastic recovery and high temperature stability were improved by the introduction of rMCEFS.Interfacial interaction between asphalt and r-MCEFS was increased.