冷再生用乳化沥青残留物的流变特性  

Rheological Properties of Emulsified Asphalt Residue for Cold Regeneration

作　　者：汪德才 郝培文[3] 乐金朝[1] 孙杨 张庆[4] WANG Decai;HAO Peiwen;YUE Jinchao;SUN Yang;ZHANG Qing(School of Water Conservancy and Environment,Zhengzhou University,Zhengzhou 450000,China;Henan Transportation Science and Technology Research Institute Co.,Ltd.,Zhengzhou 450006,China;Key Laboratory of Highway Engineering in Special Region of Ministry of Education,Chang an University,Xi'an 710064,China;College of Chemistry and Chemical Engineering,Henan Normal University,Xinxiang 453007,China)

机构地区：[1]郑州大学水利与环境学院,郑州450000 [2]河南省交通科学技术研究院有限公司,郑州450006 [3]长安大学特殊地区公路工程教育部重点实验室,西安710064 [4]河南师范大学化学化工学院,新乡453007

出　　处：《材料导报》2020年第6期81-87,共7页Materials Reports

基　　金：国家自然科学基金青年基金(51708513)~~

摘　　要：为深入认识冷再生用乳化沥青材料特性及其残留物作用机制,采用动态剪切流变试验和重复蠕变试验,在高温蒸发方式和低温蒸发方式两种不同条件下制备乳化沥青残留物。并通过变化乳化剂种类、用量以及添加改性剂方式改变材料组成,结合方差分析,探析不同材料组成及制备方法对乳化沥青残留物流变性能的影响。试验结果表明:乳化剂种类、用量及制备方式对乳化沥青残留物高温流变性能有显著影响;残留物车辙因子与温度呈幂函数关系,高温蒸发下改性乳化沥青残留物车辙因子变化特征与普通乳化沥青残留物存在明显差异,而低温蒸发条件下变化特征与普通乳化沥青残留物相一致,高温蒸发条件会降低乳化沥青残留物PG分级温度;高温蒸发条件下改性乳化沥青残留物第1 s加载阶段表现为非规则曲线变化特征的粘弹性流体特性,这与低温蒸发条件下改性乳化沥青残留物的流变特性并不一致;普通乳化沥青残留物同一蒸发条件下采用车辙因子与蠕变柔量评价其高温性能具有良好的一致性。本研究提出改性乳化沥青残留物获取应采用低温蒸发方法,高温性能评价指标应采用蠕变柔量。In order to deeply understand the characteristics of emulsified asphalt material for cold recycling and the mechanism of its residue action,dynamic shear rheological test and repeated creep test were adopted.Emulsified asphalt residues were prepared under two different conditions of a high-temperature evaporation mode and a low-temperature evaporation mode.The material composition was changed by changing the type and dosage of emulsifier and adding modifier.Combined with variance analysis,the influence of different material composition and preparation methods on the rheological properties of emulsified asphalt residue was analyzed.The test results show that the type,dosage and preparation method of emulsifier have significant influence on the rheological properties of emulsified asphalt residue at high temperature.The rutting factor of residue shows a power function relation with temperature.The variation characteristics of rutting factor of modified emulsified asphalt residue under high-temperature evaporation are obviously different from that of common emulsified asphalt residue,while the variation characteristics under low-temperature evaporation are consistent with that of common emulsified asphalt residue,and the PG classification temperature of emulsified asphalt residue will be reduced under high-temperature evaporation.The modified emulsified asphalt residue presents the viscoelastic fluid characteristic of irregular curve change in the 1st loading stage,which is inconsistent with the rheological characteristic of the modified emulsified asphalt residue under the condition of low temperature evaporation.The rutting factor and creep compliance are used to evaluate the high temperature performance of common emulsified asphalt residue under the same evaporation condition,which has good consistency.In this study,it is proposed that low-temperature evaporation method should be used to obtain the residue of modified emulsified asphalt,and creep compliance should be used as the high-temperature performance evalu

关 键 词：冷再生 乳化沥青残留物 获取方法 流变 评价 

分 类 号：U414[交通运输工程—道路与铁道工程]