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Advances in Materials Science and Engineering
Volume 2018, Article ID 3929682, 13 pages
https://doi.org/10.1155/2018/3929682
Research Article

Investigation of Cement-Emulsified Asphalt in Plastic Concrete

1College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, China
2Yangtze River Scientific Research Institute, Wuhan 430010, China
3State Key Laboratory of Silicate Materials for Architecture, Wuhan University of Technology, Wuhan 430070, China

Correspondence should be addressed to Meijuan Rao; moc.361@gnidnaujiemoar

Received 22 December 2017; Accepted 8 March 2018; Published 3 April 2018

Academic Editor: Lijing Wang

Copyright © 2018 Xiaohu Yan et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The mechanical, mesodamage, and the microproperties of cement-emulsified asphalt concrete have been investigated by computed tomography (CT), scanning electron microscopy (SEM), X-ray diffraction (XRD), and thermogravimetric analysis (TG) in this work. Emulsified asphalt delayed the hydration of cement, making the early compressive strength of concrete develop slowly. However, the concrete compressive strength increased rapidly with the demulsification of emulsified asphalt. The damage stages of condense, expansion of volume, rapid crack propagation, and damage by real-time scanning have been observed. The CT mean value of the place near the lower end face suffered a larger decline but a smaller decline to the upper part of the sample. The evolution of concrete suffering damage to failure is a gradual development process, and no sharp expansion of brittle failure. The unhydrated cement, incorporation asphalt, fibrous C–S–H gel, CH, needle-shaped ettringite, and other hydration products were interwoven to constitute emulsified asphalt-cement paste, forming a spatial structure.