木质素改性沥青高温流变性能及施工温度研究  

Study on High Temperature Rheological Properties and Construction Temperature of Lignin Modified Asphalt

作　　者：汪海 蔡猛 唐文波 廖春花 程承 WANG Hai;CAI Meng;TANG Wenbo;LIAO Chunhua;CHENG Cheng(Shuicheng Highway Administration Bureau of Guizhou Province,Shuicheng,Guizhou 553000,China;School of Civil Engineering,Southwest Forestry University,Kunming,Yunnan 650224,China)

机构地区：[1]贵州省水城公路管理局,贵州水城553000 [2]西南林业大学土木工程学院,云南昆明650224

出　　处：《公路工程》2023年第5期147-153,共7页Highway Engineering

基　　金：贵州省公路局科技项目(2021QLM06);云南省教育厅科学研究基金项目(2020J0420);云南省科技厅科技计划项目(农业联合专项)(202101BD070001-060)。

摘　　要：为了探索不同掺量的木质素改性沥青在短期老化的流变性能及合理的施工温度范围,采用动态剪切流变仪,通过温度扫描和频率扫描对试验沥青的高温流变性能进行了分析。同时,采用布氏旋转黏度计来测量计算出沥青黏温曲线。研究结果表明,木质素可有效提高基质沥青的高温稳定性能、抗老化性能,二者随着掺量的增加越发显著。木质素与基质沥青具有较好的相容性,说明木质素可以有效提高基质沥青的高温稳定性能、抗老化性能。基质沥青的黏度随着木质素含量的增加而增加,且在一定范围内,此种改性效果对沥青路用性能是有益的。同时木质素改性沥青在各个温度区间的温度敏感性是不同的,需要明确合理的施工温度范围。木质素掺量大约15%时的最佳施工拌和温度范围170~178℃,最佳施工压实温度范围157~163℃。In order to explore the rheological properties of lignin modified asphalt with different content in short-term aging and reasonable construction temperature range,the dynamic shear rheometer is used to analyze the high-temperature rheological properties by temperature scanning and frequency scanning of the test asphalt.At the same time,the Brookfield rotary viscometer is used to measure and calculate the asphalt viscosity temperature curve.The research results show that lignin can effectively improve the high-temperature stability and anti-aging performance of the base asphalt,which is more significant with the increase of the content.Lignin has good compatibility with base asphalt,indicating that lignin can effectively improve the high-temperature stability and anti-aging performance of base asphalt.The viscosity of base asphalt increases with the increase of lignin content,and in a certain range,this modification effect is beneficial to the pavement performance of asphalt.At the same time,the temperature sensitivity of lignin modified asphalt in each temperature range is different,and a reasonable construction temperature range needs to be defined.When the lignin content is about 15%,the best construction mixing temperature range is 170~178 ℃,and the best construction compaction temperature range is 157~163 ℃.

关 键 词：木质素 沥青 短期老化 流变性能 黏度 

分 类 号：U414[交通运输工程—道路与铁道工程]