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Open AccessArticle

Influence of Emulsified Asphalt on the Mechanical Property and Microstructure of Cement-Stabilized Gravel under Freezing and Thawing Cycle Conditions

by Yiqi Wang 1,2, Yiqiu Tan 1,*, Meng Guo 3,* and Xinglong Wang 4
1
School of Transportation Science and Engineering, Harbin Institute of Technology, Harbin 150090, China
2
College of Civil and Architectural Engineering, Heilongjiang Institute of Technology, Harbin 150050, China
3
National Center for Materials Service Safety, University of Science and Technology Beijing, Beijing 100083, China
4
Heilongjiang Institute of Highways and Transport Research, Harbin 150080, China
*
Authors to whom correspondence should be addressed.
Academic Editor: Geminiano Mancusi
Materials 2017, 10(5), 504; https://doi.org/10.3390/ma10050504
Received: 20 March 2017 / Revised: 16 April 2017 / Accepted: 3 May 2017 / Published: 6 May 2017
Properties of cement-stabilized gravel modified by emulsified asphalt under freezing and thawing cycle conditions were investigated by adjusting the dosage of cement. Mercury intrusion porosimetry (MIP) and Scanning electron microscopy (SEM) were introduced to analyze the influential mechanism. The results indicate that cement emulsified asphalt stabilized gravel with 5 wt % of cement performed well in both mechanics and frost-resistance. Although the addition of emulsified asphalt would lead to a partial decrease of strength, it can extend the process of strength loss and improve the freezing resistance. The main reason for this is that the permeability can be improved by the filling effects of emulsified asphalt. The frost-heave stress caused by the phase transition of water can also be remitted by emulsified asphalt, the elasticity modulus of which is much lower than the matrix. The generating speed of the micro crack can also be slowed down by emulsified asphalt. View Full-Text
Keywords: emulsified asphalt; cement-stabilized gravel; freezing and thawing cycle; mechanical property; microstructure; frost-resistance property emulsified asphalt; cement-stabilized gravel; freezing and thawing cycle; mechanical property; microstructure; frost-resistance property
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Wang, Y.; Tan, Y.; Guo, M.; Wang, X. Influence of Emulsified Asphalt on the Mechanical Property and Microstructure of Cement-Stabilized Gravel under Freezing and Thawing Cycle Conditions. Materials 2017, 10, 504.

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