丁基脱硫橡胶改性沥青的制备与性能研究
Preparation and properties of butyl reclaimed rubber modified asphalt
孙佳豪 1况栋梁 1祁聪 2韩善剑 3陈华鑫 1吴永畅1
作者信息
- 1. 长安大学材料科学与工程学院,陕西西安 710061
- 2. 京博(海南)新材料有限公司,海南儋州 571700
- 3. 海南省交通投资控股有限公司,海南海口 570100
- 折叠
摘要
用丁基脱硫橡胶(R-IIR)对沥青进行改性,制备了丁基脱硫橡胶改性沥青.通过常规物理指标、高温流变、荧光显微、傅里叶红外光谱和玻璃化转变温度测试对沥青路用性能和微观结构进行分析.结果表明,随着R-IIR掺量的增加,改性沥青软化点、135 ℃黏度和175℃黏度逐渐增大,但当掺量＞35％后,软化点开始减小,结合感温性能和储存稳定性能的分析,确定R-IIR的最佳掺量为35％;R-IIR的加入大幅提高了沥青的高温稳定性;随着掺量的增加,R-IIR在沥青中的溶解是从简单溶胀到逐渐形成具有刚性网络结构的过程,掺量＞35％后,在沥青中分散不均匀,并析出.R-IIR对沥青的改性过程中不仅存在简单的物理变化,还伴随着R-IIR交联键断裂后与沥青重组的化学变化,R-IIR的加入使沥青玻璃化转变温度升高.
Abstract
Asphalt was modified with butyl desulphurized rubber,so the butyl desulphurized rubber modi-fied asphalt was prepared.The pavement performance and microstructure of asphalt were analyzed by con-ventional physical parameters,high temperature rheology,fluorescence microscopy,Fourier infrared spec-troscopy and glass transition temperature.The results showed that with the increase of R-IIR content,the softening point,viscosity at 135 ℃ and viscosity at 175 ℃ of modified asphalt gradually increase,but the softening point begin to decrease when the content was greater than 35％,the optimum content of R-IIR is 35％based on the analysis of temperature sensitivity and storage stability;the addition of R-IIR greatly improves the stability of asphalt at high temperature;with the increase of the content,the dissolution of R-IIR in asphalt is a process from simple swelling to the formation of a rigid network structure.When the content is greater than 35％,R-IIR is unevenly dispersed and precipitated in asphalt;during the modifica-tion of asphalt by R-IIR,there are not only simple physical changes,but also chemical changes recombi-nation with asphalt after R-IIR crosslinking bond is broken;the glass transition temperature of asphalt is increased with the addition of R-IIR.
关键词
道路工程/丁基脱硫橡胶(R-IIR)/丁基脱硫橡胶改性沥青/路用性能/微观结构Key words
road engineering/butyl reclaimed rubber(R-IIR)/butyl reclaimed rubber modified asphalt/pavement performance/microstructure引用本文复制引用
基金项目
国家自然科学基金项目(52178410)
海南省科学技术厅重点研发计划项目(ZDYF2023GXJS147)
陕西省秦创元"科学家+工程师"团队建设项目(2022KXJ-004)
出版年
2024
NETL
NSTL
万方数据