[1]汪德才,常昊雷,郝培文,等.改性乳化沥青冷再生混合料动态模量特性[J].长安大学学报(自然科学版),2020,40(6):35-46.
　WANG De cai,CHANG Hao lei,HAO Pei wen,et al.Dynamic modulus characteristics of modified coldrecycled mixture with asphalt emulsions[J].Journal of Chang’an University (Natural Science Edition),2020,40(6):35-46.
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改性乳化沥青冷再生混合料动态模量特性()
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长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]

卷:
第40卷
期数:
2020年6期
页码:
35-46
栏目:
道路工程
出版日期:
2020-11-15

文章信息/Info

Title:
Dynamic modulus characteristics of modified coldrecycled mixture with asphalt emulsions
作者:
汪德才; 常昊雷; 郝培文; 蔡迎春
（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 450000； 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 Decai1; 2;  CHANG Haolei2;  HAO Peiwen3;  CAI Yingchun2
（1. School of Civil Engineering and Communication, North China University of Water Resources andElectric Power, Zhengzhou 450045, Henan, China; 2. School of Water Conservancy and Environment,Zhengzhou University, Zhengzhou 450000, Henan, China; 3. Key Laboratory for Special Region HighwayEngineering of Ministry of Education, Changan University, Xian 710064, Shaanxi, China）
关键词:
道路工程; 乳化沥青冷再生; 动态模量; 改性手段; 灰熵关联度
Keywords:
road engineering;  cold recycled of asphalt emulsion;  dynamic modulus;  modification mean;  grey entropy correlation
文献标志码:
A
摘要:
为了适应沥青路面新的动态设计方法，加深对改性乳化沥青冷再生混合料动态模量的认识，针对再生剂(rejuvenation agent，RA)、玄武岩纤维（basalt fiber，BF）、布敦岩沥青（Buton rock asphalt，BRA）及聚苯乙烯丁二烯共聚物（SBR）胶乳改性的乳化沥青冷再生混合料，开展单轴压缩动态模量与车辙试验，利用时温等效原理将不同温度下的乳化沥青冷再生混合料动态模量平移形成主曲线，并通过图像比对得到乳化沥青冷再生混合料的最佳外掺剂以及最佳掺量，最后基于灰熵理论进行动态模量与动稳定度的关联分析。试验结果表明：乳化沥青冷再生混合料黏弹性质与普通热拌沥青混合料相近；RA可以显著改善乳化沥青冷再生混合料的黏弹特性，并可降低乳化沥青的用量，但RA用量并非越多越好，推荐RA最佳用量为8％。利用Sigmoidal函数确立了7种不同乳化沥青冷再生混合料动态模量主曲线，其总体呈现出S形扁平状曲线特征。在同一级配与油石比条件下，BRA、SBR胶乳改性方式均能提升乳化沥青冷再生混合料的高温性能，而掺量（质量分数，下同）4%、8%、12%的RA改性对其高温性能有负面影响，相比于普通（未改性）乳化沥青冷再生混合料，采用SBR、BRA胶乳改性的冷再生混合料动稳定度分别增加18.6%、5.5％，而BF改性以及掺量为4%、8%、12%的RA改性，冷再生混合料的动稳定度分别下降10.8％、12%、30.1%、51.7%。乳化沥青冷再生混合料动态模量与动稳定度的关联度较好。试验成果可为改性乳化沥青冷再生混合料动态模量提升及其在道路维修设计中的应用提供依据。
Abstract:
In order to comply with the new dynamic design method of asphalt pavement and further understand the dynamic modulus of modified cold recycled mixture with asphalt emulsions (CRME), uniaxial compression dynamic modulus test and rutting test were carried out about different CRME with rejuvenation agent (RA), basalt fiber (BF), Buton rock asphalt (BRA) and SBR latex modified. The principle of timetemperature equivalence was used to translate the dynamic modulus of the CRME at different temperatures to form principal curves, and the best admixture and the best content of the admixture were obtained through image comparison. Finally, the correlation between dynamic modulus and dynamic stability was analyzed base on grey entropy theory. The results show that the viscoelastic properties of the CRME are similar to those of ordinary hotmixed (unmodified) asphalt mixtures. The additive RA can significantly improve the viscoelastic properties of the CRME and reduce the amount of emulsified asphalt. But the amount of RA is not as much as possible, according to the dynamic modulus test, the optimum dosage of RA is 8%. Using sigmoidal function, the master curves of dynamic modulus of the seven different CRME are established, which show Sshaped flat curve characteristics. Under the same gradation and asphalt aggregate ratio, both BRA and SBR latex modification methods can improve the high temperature performance of CRME, while BF modification and RA modification with 4%, 8% and 12% respectively, it have negative effects on hightemperature performance of the CRME. Compared with unmodified CRME, the dynamic stability of SBR latex and BRA modified CRME increased by 18.6% and 5.5%. However, when CRME with BF or mixed with 4%, 8% and 12% of RA, the dynamic stability of the CRME decreased by 10.8%, 12%, 30.1% and 51.7%. The grey entropy correlation analysis shows that the correlation between dynamic modulus and dynamic stability of CRME is pretty good. The test results have a certain technical reference value for improving the dynamic modulus of CRME and its application in road maintenance design. 6 tabs, 11 figs, 28 refs.

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更新日期/Last Update: 2020-12-17