废旧塑料改性沥青混合料动态模量研究  

Research on dynamic modulus of waste plastic modified asphalt mixture

作　　者：张倩[1] 谢来斌[1] 李彦伟 何勇海[3] 刘建[3] 

机构地区：[1]西安建筑科技大学土木工程学院,陕西西安710055 [2]石家庄交通运输局,河北石家庄050001 [3]河北省交通规划设计院,河北石家庄050001

出　　处：《西安建筑科技大学学报（自然科学版）》2011年第5期755-759,共5页Journal of Xi'an University of Architecture & Technology(Natural Science Edition)

基　　金：陕西省自然科学基金资助项目(SJ08E208);陕西省教育厅自然科学专项项目(09JK560);石家庄交通运输局科技项目

摘　　要：针对目前大量废旧塑料处置问题,尝试将其用于改性沥青混合料,以探索其在道路工程中使用的可能性.采用超市废旧高密度聚乙烯购物塑料袋,将其切碎后按照2%.5%和8%的掺量制作沥青混合料试件,采用三种试验温度在六种加载频率下进行动态模量试验,与未掺加塑料混合料的相应指标进行对比.试验结果显示在各个试验温度和加载频率下,掺加塑料屑的混合料动态模量普遍提高.掺加塑料与否对相位角指标的影响未呈现一定规律.在各个试验温度和加载频率下,2%塑料掺量混合料均具有较高的动态模量和相位角.Waste plastic is reused in pavement engineering in this research. The purpose of the study is to probe the possi- bility of using waste plastic in asphalt mixture as a kind of modifier so as to find a way to solve the problem of the waste plastic disposal. High Density Polyethylene plastic bags obtained from supermarket were shredded into pieces and were added into asphalt mixture at three percentages of 2%, 5 % and 8 %. The corresponding control samples were also made and tested. Three different temperatures were used （4~C, 21.3~C and 39.2~C） and the frequencies ranged from 0.1 Hz to 25 Hz in this dynamic modulus test. When compared with the test results of the control samples, almost all the dynamic modulus of the plastic modified samples（except 4 results） are greater than those of the control samples. No regular pat- tern is shown in the test results of the phase angle. Modified asphalt mixture with 2~ plastic is of the greatest dynamic modulus and phase angle.

关 键 词：道路工程 塑料改性 动态模量试验 沥青混合料 相位角 

分 类 号：U414[交通运输工程—道路与铁道工程]