Effect and Action Mechanism of Cement and Emulsified Asphalt on the Strength of Cold Regeneration

被引：0
|
作者：
Wei T. [1 ,2 ]
Hong J. [1 ,2 ]
Lin J. [3 ]
机构：
[1] Jiangsu Sobute New Materials Co., Ltd., Nanjing
[2] State Key Laboratory of High Performance Civil Engineering Materials, Nanjing
[3] Jiangsu Research Institute of Building Science Co., Ltd., Nanjing
来源：
Hong, Jinxiang (hongjinxiang@cnjsjk.cn) | 1600年 / Tongji University卷 / 20期
关键词：
Action mechanism; Cement; Emulsified asphalt; Strength;
D O I：
10.3969/j.issn.1007-9629.2017.02.027
中图分类号：
学科分类号：
摘要：
The strength development of cold regeneration with asphalt emulsion(CRAE) under the constant environment condition was revealed by indoor simulation test, and then the strength contribution in different periods under the conditions of different content of cement and asphalt emulsion was studied. The cement hydration process in cement emulsified asphalt mortar, and asphalt emulsion demulsification process were analyzed by micro analysis method such as ESEM et al. The results indicate that the development of strength of CRAE shows the long-term mode that not only the rapid growth in the early stage and the slow growth in the late stage, but also the early and late strength can be promoted significantly by cement. It has also shown that the larger the content, the higher the amplitude; cement contributes to the rapid improvement of early strength. Demulsification asphalt provides the main source of strength. At the best asphalt emulsion content maximum early or late strength can be achieved. The early cement hydration reaction can be inhibited by asphalt emulsion and the effect of cement on asphalt emulsion demulsification is mainly reflected by the attraction of cement particles and the particles agglomeration due to the hydration product. The reinforced structure formed by cement hydration products and asphalt can promote the strength further. © 2017, Editorial Department of Journal of Building Materials. All right reserved.
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页码：310 / 315
页数：5
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共 10 条
  • [1] Xu Y., Sun L., Liu L., Optimization of the design method of the emulsified asphalt cold recycled mixture considering the hot compaction process, Highway Engineering, 38, 3, pp. 72-76, (2013)
  • [2] Shi F., Li X., Sun D., Et al., Discussion about design methods for recycling cold mix asphalt, Highway, 11, pp. 102-107, (2004)
  • [3] Jiang T., Sun L., Liu L., Et al., Material composition research of cold recycled upper base based on structure performance, Journal of Building Materials, 11, 6, pp. 666-672, (2008)
  • [4] Suleiman N., A state-of-the-art review of cold in-place recycling of asphalt pavements in the Northem plains region, (2002)
  • [5] Blankenagei B.J., Characterization of recycled concrete for use as pavement base material, (2005)
  • [6] Qi D., The fatigue performance of cold-recycling emulsified alphalt mixture, (2010)
  • [7] Xiao J., Design and performance of cold recycled mixture using emulsified asphalt, (2007)
  • [8] Xu D., Chen X., Zheng N., Mix proportion design and performance of the cold recycling mixture of emulsified asphalt, Journal of Guangxi University(Natural Science), 37, 1, pp. 103-109, (2012)
  • [9] Li Y., Li C., Liu A., Study on molding methods and compressive strength of sement emulsified asphalt mixture with coupling agent, Journal of Wuhan University of Technology(Transportation Scicncc & Engineering), 39, 6, pp. 1215-1220, (2015)
  • [10] Li M., Study on dynamic modulus characteristics and master curve of foamed(emulsified) asphalt cold recycled mixture, Highway Engineering, 41, 3, pp. 8-16, (2016)
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