J. Hefei Univ. Tech. (Nat. Sci.)

合肥工业大学学报(自然科学版)

JOURNAL OF HEFEI UNIVERSITY OF TECHNOLOGY (NATURAL SCIENCE)

Competent Authorities: Ministry of Education of the People's Republic of China

Sponsor by: Hefei University of Technology

ISSN 1000-1646, CN 34-1001/N

VAE modified emulsified asphalt and its performance

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VAE 改性乳化沥青及其性能研究

Journal Information

J. Hefei Univ. Tech. (Nat. Sci.), Apr.2023, Vol.46 No.4: 481-486, 493

DOI: 10.3969/j.issn.1003-5060.2023.04.009

Authors

YAO Ailing $ ^{1} $, YANG Hao $ ^{1} $, ZHENG Huayu $ ^{2} $, MA Junlong $ ^{3} $, WANG Yonggang $ ^{4} $, WANG Leiting $ ^{5} $

(1. Key Laboratory of Highway Engineering in Special Areas of Education, Chang'an University, Xi'an 710064, China; 2. School of Sciences, Chang'an University, Xi'an 710064, China; 3. The Fifth Branch of Shanxi Road and Bridge The First Engineering Co., Ltd., Taiyuan 030006, China; 4. Shanxi Road and Bridge Group Test and Inspection Center Co., Ltd., Taiyuan 030006, China; 5. Hangshao Management Office of Hangjinqu Branch of Zhejiang Communications Investment Group Co., Ltd., Shaoxing 311816, China)

Abstract and Keywords

Abstract: Aiming at the problem of poor water stability and temperature stability of common emulsified asphalt cold recycled mixture, a vinyl acetate-ethylene (VAE) modified emulsified asphalt was proposed. The type of VAE modifier selected by the exfoliation rate of the modified emulsified asphalt on the aggregate and the technical indicators of the remaining asphalt after evaporation is DA-1410 rubber powder. The effect of VAE content (mass fraction) on the performance of evaporation residue of modified emulsified asphalt was tested using dynamic shear rheometer (DSR) and fluorescence microscope tests. The results show that with the increase of VAE content, the three major indicators of modified emulsified asphalt evaporation residue, standard viscosity of asphalt, and exfoliation rate of asphalt on the aggregate significantly increase; complex shear modulus $ G^{} $ and rutting factor $ G^{}/\sin\delta $ gradually increase; when the VAE content is 3%-4%, the various performance indicators of asphalt are excellent, and the solidified particles are evenly distributed in the asphalt to form a tightly combined cross-linked structure, thereby improving the performance of the emulsified asphalt. The research results can provide a reference for expanding the cold recycling technology and its application.

Keywords: road engineering; cold recycling of emulsified asphalt; vinyl acetate-ethylene(VAE) modified emulsified asphalt; dynamic shear rheometer(DSR) test; fluorescence microscope test

作者信息

姚爱玲 $ ^{1} $，杨浩 $ ^{1} $，郑华宇 $ ^{2} $，马俊龙 $ ^{3} $，王永岗 $ ^{4} $，王磊挺 $ ^{5} $

（1. 长安大学特殊地区公路工程教育部重点实验室，陕西西安 710064；2. 长安大学理学院，陕西西安 710064；3. 山西路桥第一工程有限公司五分公司，山西太原 030006；4. 山西路桥集团试验检测中心有限公司，山西太原 030006；5. 浙江省交通投资集团有限公司杭金衢分公司杭绍管理处，浙江绍兴 311816）

摘要和关键词

摘要: 针对普通乳化沥青冷再生混合料水稳定性与温度稳定性较差的问题, 文章提出醋酸乙烯-乙烯（vinyl acetate-ethylene, VAE）水性胶改性乳化沥青; 通过改性乳化沥青在集料表面的剥落率、蒸发残留后的沥青技术指标优选出 VAE 改性剂的种类为 DA-1410 胶粉; 采用动态剪切流变仪（dynamic shear rheometer, DSR）试验及荧光显微镜试验, 测试 VAE 质量分数（简称“掺量”）对改性乳化沥青蒸发残留物性能的影响。结果表明: 随着 VAE 掺量增加, 改性乳化沥青蒸发残留物的三大指标、沥青标准黏度及沥青在集料表面的剥落率都显著提高; 复数剪切模量 $ G^{} $ 和车辙因子 $ G^{}/\sin\delta $ 逐渐增大; 当 VAE 掺量为 $ 3\%\sim4\% $ 时, 沥青的各项性能指标都优异, 且其固化物颗粒在沥青中均匀分布, 形成紧密结合的交联结构, 乳化沥青的性能得到改善。研究结果可为拓展冷再生技术及其应用提供参考。

关键词: 道路工程;乳化沥青冷再生;醋酸乙烯-乙烯(VAE)水性胶改性乳化沥青;动态剪切流变仪(DSR)试验;荧光显微镜试验

Funding

国家自然科学基金资助项目（52078048）；山西路桥建设集团科技资助项目（SXLQ-YGS-035-2020）

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