凹凸棒土/SBS复合改性沥青抗老化性能与热稳定性研究
Research on Aging Resistance and Thermal Stability of Convex Rod Soil/SBS Composite Modified Asphalt
秦坚 1唐基凯 1韦梦贤 1周乾 2赖淏 3师长春 3熊锐3
作者信息
- 1. 广西上横高速公路有限公司 南宁市 530300
- 2. 广西交通设计集团有限公司 南宁市 530011
- 3. 长安大学材料科学与工程学院 西安市 710064
- 折叠
摘要
为探究凹凸棒土对SBS改性沥青抗老化性能与热稳定性的影响,制备不同凹凸棒土掺量的复合改性沥青.研究了复合改性沥青老化前后的基本物理性能与化学组分变化,使用热重试验分析了复合改性沥青的热稳定性.结果表明:凹凸棒土的引入提升了沥青的热稳定性,改善了沥青的高温性能,降低了沥青的老化速率;超过7.5％的凹凸棒土掺量可能对沥青性能产生负面影响,其最佳掺量不应超过7.5％.
Abstract
In order to explore the effect of attapulgite on the aging resistance and thermal stability of SBS modified asphalt,composite modified asphalt with different content of attapulgite is prepared.The changes of basic physical properties and chemical components of composite modified asphalt before and after aging are studied.The thermal stability of composite modified asphalt is analyzed by thermogravimetric experiment.The results show that the introduction of attapulgite can improve the thermal stability of asphalt,improve the high temperature performance of asphalt,and reduce the aging rate of asphalt.However,more than 7.5％of attapulgite content may have a negative impact on asphalt performance,and its optimal content should not exceed 7.5％.
关键词
道路工程/沥青/凹凸棒土/沥青老化/沥青热稳定性Key words
road engineering/asphalt/attapulgite/asphalt aging/asphalt thermal stability引用本文复制引用
基金项目
2022年度广西交通运输行业重点科技项目(64)
出版年
2024
NETL
NSTL
万方数据