摘要
为了解决苯乙烯-丁二烯-苯乙烯嵌段共聚物(SBS)改性沥青路面抗高温性能不足及易产生车辙病害的问题,通过在SBS改性沥青中分别加入3%、4%、5%的高密度聚乙烯(HDPE),考察HDPE对SBS改性沥青性能的影响,并与单一SBS改性沥青进行对比。采用常规性能指标、温度扫描实验、频率扫描实验、荧光显微镜技术、红外光谱(FTIR)表征对复合高强改性沥青的性能进行研究。结果表明,复合高强改性沥青体系中发生了交联反应,形成了致密的网状结构,且随着HDPE掺量的增加,复合高强改性沥青的软化点、布氏黏度与车辙因子等指标呈上升趋势;与SBS改性沥青相比,其抗高温变形的能力得到显著提升。但是当HDPE掺量增加到5%时,改性剂开始产生团聚现象,对复合改性沥青的低温性能造成负面影响,基于此推荐HDPE的最佳掺量为4%。
In order to solve the problems of insufficient high temperature resistance and rutting of styrene-butadiene-styrene block copolymer(SBS)modified asphalt pavement,this paper investigated the effect of HDPE on the performance of SBS modified asphalt by adding 3%,4%and 5%high-density polyethylene(HDPE)to SBS modified asphalt,and compared it with single SBS modified asphalt.The properties of composite high-strength modified asphalt were researched by conventional performance index,temperature scanning experiment,frequency scanning experiment,fluorescence microscope technology and FTIR.The results showed that the cross-linking reaction occurred in the composite high-strength modified asphalt system,forming a dense network structure.And with the increase of HDPE content,the softening point,Brinell viscosity and rutting factor of composite high-strength modified asphalt showed an upward trend.Compared with SBS modified asphalt,the resistance to high temperature deformation is significantly improved.However,when the content of HDPE is increased to 5%,the modifier begins to agglomerate,which has a negative impact on the low-temperature performance of the composite modified asphalt.Based on this,the best content of HDPE is recommended to be 4%.
作者
王进成
董夫强
王诗雨
祖元哲
刘开鑫
WANG Jin-cheng;DONG Fu-qiang;WANG Shi-yu;ZU Yuan-zhe;LIU Kai-xin(College of Civil and Transportation Engineering,Hohai University,Nanjing 210098,Jiangsu,China)
出处
《合成材料老化与应用》
2023年第2期1-4,118,共5页
Synthetic Materials Aging and Application
基金
国家自然科学基金(52278451)。
关键词
复合高强改性沥青
HDPE
流变特性
微观结构
composite high-strength modified asphalt
HDPE
rheological properties
microstructure
