[1]汪德才,郝培文,孙 杨,等.冷再生用乳化沥青稳定性评价指标研究[J].郑州大学学报(工学版),2021,42(01):82-88.[doi:10.13705/j.issn.1671-6833.2021.01.011]
　WANG Decai,HAO Peiwen,SUN Yang,et al.Stability Evaluation Indexes of Emulsified Asphalt for Cold Regeneration[J].Journal of Zhengzhou University (Engineering Science),2021,42(01):82-88.[doi:10.13705/j.issn.1671-6833.2021.01.011]

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冷再生用乳化沥青稳定性评价指标研究()

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《郑州大学学报(工学版)》[ISSN:1671-6833/CN:41-1339/T]

卷:

42卷

期数:

2021年01期

页码:

82-88

栏目:

出版日期:

2021-03-14

文章信息/Info

Title:

Stability Evaluation Indexes of Emulsified Asphalt for Cold Regeneration

作者:

汪德才1; 2; 郝培文3; 孙 杨2; 李瑞霞2

1.华北水利水电大学 土木与交通学院，河南 郑州 450045； 2.郑州大学 水利科学与工程学院，河南 郑州 450001； 3.长安大学 特殊地区公路工程教育部重点试验室，陕西 西安 710064

Author(s):

WANG Decai1; 2;  HAO Peiwen3;  SUN Yang2;  LI Ruixia2

1.School of Civil Engineering and Communication,North China University of Water Resources and Electric Power, Zhengzhou 450045，China; 2.School of Water Conservancy Engineering, Zhengzhou University, Zhengzhou 450001, China; 3.Key Laboratory of Highway Engineering in Special Region of Ministry of Education，Chang′an University，Xi′an 710064，China

关键词:

冷再生; 乳化沥青; 稳定性; 粒径; Zeta电位; 界面张力; 灰熵关联分析

Keywords:

cold regeneration;  emulsified asphalt;  stability;  particle size;  Zeta potential;  interfacial tension;  grey entropy correlation analysis

分类号:

U414

DOI:

10.13705/j.issn.1671-6833.2021.01.011

文献标志码:

A

摘要:

针对冷再生用乳化沥青的稳定性，开展了乳化剂种类、用量及SBR改性乳化沥青粒径、Zeta电位、界面张力的室内试验，提出了表征乳化沥青稳定性的指标要求。试验结果表明:不同乳化剂种类制备的乳化沥青的粒径大小与分布均不同，随着乳化剂用量的增加，平均粒径、D90与不均匀系数减小，稳定性增加；乳化剂的种类和用量对Zeta电位和界面张力有显著影响，随着乳化剂用量增加，Zeta电位明显增加，界面张力明显减小，当用量达到一定时乳液稳定性能趋于稳定；SBR改性乳化沥青的粒径大小及分布基本与未改性前一致，Zeta电位增大，储存稳定性略有减小。灰熵关联分析表明：界面张力、粒径不均匀系数与乳化沥青稳定性相关性最好，其次是D90与平均粒径，Zeta电位最小。推荐当D90≤7 μm，平均粒径≤4 μm，不均匀系数≤4，Zeta电位﹥28 mV，界面张力<3.3 mN/m时,即可满足现行规范中稳定性的指标要求。

Abstract:

Aiming at the stability of emulsified asphalt for cold regeneration, laboratory tests were carried out on the types and dosage of emulsifier, particle size, Zeta potential and interfacial tension of SBR modified emulsified asphalt, and the index requirements for characterizing the stability of emulsified asphalt were put forward. The results showed that the particle size and distribution of the emulsified asphalt prepared by different emulsifier types were different. With the increase of the amount of emulsifier, the average particle size, D90 and ununiformity coefficient regeneration and the stability increased. The type and amount of emulsifier had a significant effect on the Zeta potential and interfacial tension. As the amount of emulsifier increased, the Zeta potential increased significantly and the interfacial tension decreased. When the amount reached a certain level, the emulsion stability tended to be stable. The particle size and distribution of SBR modified emulsified asphalt were basically the same as those before unmodified, but the Zeta potential increased, and the storage stability slightly reduced. The grey entropy correlation analysis showed that the interfacial tension and particle size ununiformity coefficient had the best correlation with the stability of emulsified asphalt, followed by D90 and average particle size, and the Zeta potential had the smallest. It was recommended that when D90≤7 μm, average particle size ≤4 μm, ununiformity coefficient ≤4, Zeta potential>28 mV, interfacial tension <3.3 mN/m, it could meet the stability requirements of the current specification.

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