木质素改性沥青的短期老化性能研究  

Short-term Aging Properties of Lignin Modified Asphalt

作　　者：程承[1,2] 彭超 胡博 孙微微 Cheng Cheng;Peng Chao;Hu Bo;Sun Weiwei(Yunnan Provincial Key Laboratory of Wood Adhesives and Glued Products, Southwest Forestry University, Kunming Yunnan 650233, China;College of Civil Engineering, Southwest Forestry University, Kunming Yunnan 650233, China;Yunnan Tongqu Engineering Testing Co. Ltd., Kunming Yunnan 650233, China)

机构地区：[1]西南林业大学云南省木材胶黏剂及胶合制品重点实验室,云南昆明650233 [2]西南林业大学土木工程学院,云南昆明650233 [3]云南通衢工程检测有限公司,云南昆明650233

出　　处：《西南林业大学学报（自然科学）》2019年第3期149-154,共6页Journal of Southwest Forestry University：Natural Sciences

基　　金：云南省木材胶黏剂及胶合制品重点实验室开放基金项目(2015007)资助;2015年地方高校国家级大学生创新创业训练计划项目(201510677002)资助

摘　　要：为研究短期老化对木质素改性沥青性能的影响,开展了常规性能实验和动态剪切流变实验,分析木质素对沥青短期老化前后性能的影响,结合热重曲线分析木质素改性沥青的抗老化机理。结果表明:木质素的掺入提高了沥青的高温性能,但对低温性能有负面影响需进行改善;老化后木质素改性沥青各性能指标的变化较基质沥青小,木质素提高了沥青抗老化性能,综合考虑12%为最佳掺量;因木质素自身具有较好的热稳定性,在提高沥青热稳定性的同时,延缓了沥青的老化过程。In order to explore the effect of short term aging on lignin modified asphalt, the examination of properties and dynamic sheer rheological tests were carried out to analyze the properties of asphalt before and after short-term aging, and the anti-aging mechanism of lignin modified asphalt was analyzed by thermogravimetric curve (TG/DTG). The results showed that the addition of lignin improves the high temperature performance of asphalt, but has a negative effect on the low temperature performance, so it needs to be improved.The change of performance index of lignin modified asphalt after aging is smaller than that of base asphalt. Lignin improves the anti-aging property of asphalt. Twelve percent is considered as the best content. Lignin itself has good thermal stability, which not only improves the thermal stability of asphalt, but also delays the aging process of asphalt.

关 键 词：木质素 改性沥青 短期老化 高温性能 

分 类 号：S784[农业科学—林学]