SBS/胶粉复合改性沥青共混改善及其性能提升技术
Blending Improvement and Performance Improvement Technology of SBS/Rubber Powder Composite Modified Asphalt
万民晶 1田乐鹏 2张壮 2牛玺荣2
作者信息
- 1. 山西省交通开发投资集团有限公司,山西太原 030032
- 2. 山西大学电力与建筑学院,山西太原 030031;山西省智慧建筑与绿色建造技术中试基地,山西太原 030031
- 折叠
摘要
为提高SBS/胶粉复合改性沥青的储存稳定性,对其共混工艺进行了改善.分别采用不同掺量的胶粉和SBS对基质沥青进行改性,得到胶粉改性沥青母液和SBS改性沥青母液,通过将这2种母液混合制备得到共混SBS/胶粉复合改性沥青,通过与传统SBS/胶粉复合改性沥青进行对比,研究了共混改善工艺对其物理性能、流变性能和疲劳性能的影响.结果表明:共混改善工艺显著提升了 SBS/胶粉复合改性沥青的综合性能,当共混时间为30 min时,提升效果最佳;当胶粉掺量为20％时,共混SBS/胶粉复合改性沥青的储存稳定性提升约30％、低温松弛性能提升约14.6％、疲劳寿命提升约23.7％,而高温蠕变性能几乎不变;综合共混SBS/胶粉复合改性沥青的软化点变化趋势,在30 min的共混时间下,胶粉的最优掺量为20％.
Abstract
In order to improve the storage stability of SBS/rubber powder composite modified asphalt,the blending process was improved in this study.The matrix asphalt was modified by the rubber powder and SBS with different dosages respectively to get rubber powder modified asphalt mother liquor and SBS modified asphalt mother liquor.Blended SBS/rubber powder composite modified asphalt was prepared by mixing the two mother liquors.By compar-ing with traditional SBS/rubber powder composite modified asphalt,the influence of blending improvement process on the physical,rheological and fatigue performances was studied.The results showed that the improved blending process significantly enhanced the performance of SBS/rubber powder composite modified asphalt.The improvement effect is the best when a blending time is 30 min;When the rubber powder content is 20％,the storage stability was improved by approximately 30％,low-temperature relaxation performance by 14.6％,fatigue life by 23.7％,and high-temperature rutting resistance remained nearly unchanged;Based on the change trend of softening point of blended SBS/rubber powder composite modified asphalt,the optimal dosage of rubber powder was 20％with 30 min blending time.
关键词
SBS/胶粉/复合改性沥青/共混改善工艺/储存稳定性/物理-流变性能/疲劳性能Key words
SBS/rubber powder/composite modified asphalt/blending improvement process/storage stability/physic-rheological performance/fatigue performance引用本文复制引用
基金项目
国家级大学生创新创业训练计划(202210108021)
山西交控集团科技项目(2022-JKKJ-15)
出版年
2024
国家科技期刊平台
NSTL
万方数据