生活废旧塑料改性沥青性能及机理研究  

Performance and Mechanism Investigation of Recycled Plastic Modified Asphalts

作　　者：杨锡武[1] 刘克[1] 冯梅[1] 何泽[1] 

机构地区：[1]重庆交通大学土木工程学院,重庆400074

出　　处：《重庆交通大学学报（自然科学版）》2017年第1期30-35,109,共7页Journal of Chongqing Jiaotong University(Natural Science)

基　　金：重庆市交通委员会科技项目([2008]15)

摘　　要：介绍了裂化处治聚乙烯(PE)、聚丙烯(PP)类生活废旧塑料的方法。分别将原状造粒生活废旧塑料(RP)及裂化生活废旧塑料(CRP)按6%及8%掺量,掺入茂名90#及中海油70#两种基质沥青中制得生活废旧塑料改性沥青,对比试验研究了基质沥青及生活废旧塑料改性沥青的三大技术指标(针入度、软化点、延度)及存储稳定性、低温弯曲性能、黏度和老化性能。用红外光谱分析了裂化处治前后生活废旧塑料以及改性前后沥青的组成成分变化,研究了裂化处治生活废旧塑料改性沥青性能提高的机理。结果表明:各类裂化处治生活废旧塑料改性沥青高温稳定性显著提高,掺量6%条件下可使中海油70#基质沥青的软化点由48.7℃提高到70℃以上;存储稳定性好,不离析;低温弯曲、黏度、老化等性能未降低,与基质沥青性能相近。The method of cracking polyethylene （PE） and polypropylene （PP） was introduced. Two kinds matrix asphalts--Maoming-90 and CNOOC-70--were chosen, and blended with cracking recycled plastics （CRP） or non-cracking recycledplastics （RP） by mass of 6% and 8% respectively. Three indexes （penetration, soften point and ductility）, storage stabili-ty, low-temperature bending property, viscosity and aging performances of the modified asphalts mixed with cracking recy-cled plastics were compared and studied. The component variation of RP and CRP, and the components variation of the as-phalts with or without modifier were test analyzed with infrared spectrum. The modified asphalt mechanism wasanalyzed. Test results show that the high-temperature property of all kinds CRP modified asphalts increase greatly, the softenpoint of CNOOC-70 asphalt with CRP modifier addition of 6% can grow from 48. 7℃ to more than 70 ℃, and demonstratesound storage stability without segregation and meanwhile demonstrate their low-temperature bending property, viscosity andaging performances similar to that of matrix asphalt.

关 键 词：道路工程 裂化生活废旧塑料 原状造粒生活废旧塑料 改性沥青 离析 红外光谱 机理 

分 类 号：U414.3[交通运输工程—道路与铁道工程]