橡胶复合改性沥青制备工艺优化及规模化应用
Optimization of Preparation Process and Large-scale Application of Rubber Composite Modified Asphalt
兰伟伟 1殷卫永2
作者信息
- 1. 河南交通投资集团有限公司济洛西项目部,河南济源 459000
- 2. 河南省交通规划设计研究院股份有限公司,河南郑州 450000;河南省固废材料道路工程循环利用重点实验室,河南郑州 450000
- 折叠
摘要
为总结橡胶复合改性沥青在河南省应用经验,促进橡胶复合改性沥青推广应用,从制备工艺、与SBS改性沥青性能对比、规模化应用效果测评三方面分析了橡胶复合改性沥青在河南省应用实践情况,结果表明:橡胶粉在双螺杆挤出机中机械剪切速率建议为88～112 r/min,螺杆温区最高温度建议为270～290 ℃.脱硫橡胶粉和SBS复合改性沥青经4000r/min高速剪切和动态硫化处理后可保持良好储存稳定性.与常规SBS改性沥青相比,橡胶复合改性沥青常规路用性能和疲劳耐久性更优,疲劳性能提高20％～40％,老化后疲劳耐久性衰减程度较小.橡胶复合改性沥青己在河南省高速公路、国省道干线公路新建及大中修养护项目应用710.6km,在重载交通下运营4年后路面技术状况评价仍为"优".橡胶复合改性沥青路面在河南省实际工程中应用状况较好,可进一步推广应用.
Abstract
In order to summarize the application experience of rubber composite modified asphalt in Henan Province and promote the promotion and application of rubber composite modified asphalt,the application practice of rubber composite modified asphalt in Henan Province was analyzed from three aspects:preparation process,performance comparison with SBS modified asphalt,and evaluation of large-scale application effect.The results show that the recommended mechanical shear rate of rubber powder in twin screw extruder is 88 r/min～112 r/min.The recommended maximum temperature in the screw temperature range is 270 ℃ to 290 ℃.The desulfurization rubber powder and SBS composite modified asphalt can maintain good storage stability after high-speed shear and dynamic vulcanization treatment at 4000 r/min.Compared with conventional SBS modified asphalt,rubber composite modified asphalt has better road performance and fatigue durability,with a 20％to 40％increase in fatigue performance.The degree of fatigue durability degradation after aging is relatively small.Rubber composite modified asphalt has been applied for 710.6 kilometers in the construction and maintenance projects of highways and national and provincial trunk roads in Henan Province.After 4 years of operation under heavy traffic,the technical condition of the pavement is still evaluated as"excellent".The application of rubber composite modified asphalt pavement in practical projects in Henan Province is good and can be further promoted and applied.
关键词
道路材料/橡胶复合改性沥青/河南省/规模化应用/实践Key words
road materials/rubber composite modified asphalt/Henan Province/large-scale application/practice引用本文复制引用
基金项目
河南省交通厅科技成果推广项目(2019T02)
出版年
2024
国家科技期刊平台
NSTL
万方数据