RESEARCH ARTICLE


Study on the Deterioration Mechanism of Concrete Pavement for the Deicer-scaling



Li Jun1, 2, Gao Pei-Wei*, 1, Liu Hong-Wei1, 3
1 Department of Civil Engineering, Nanjing University of Aeronautic and Astronomics, Nanjing 210016,China
2 Civil Engineering College of Yancheng Institute of Technology, Yancheng 224051,China
3 Jiangsu Rongsheng Group Co., Ltd, Yangzhou 225100, P.R.China


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Creative Commons License
© 2015 Jun et al;

open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: https://creativecommons.org/licenses/by/4.0/legalcode. This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

* Address correspondence to this author at the Department of Civil Engineering, Nanjing University of Aeronautic and Astronomics, Nanjing, China. Postcard: 210016; E-mail: gpw1963@nuaa.edu.cn


Abstract

The mechanical properties of concrete pavement were studied under the various frost-salt conditions using Capillary Suction of De-icing Chemicals and Freeze-thaw Test Method (CDF method). The test results show that: with the increasing of freeze-thaw cycles, concrete surface damage has a tendency to accelerate. The concrete which is in a 5% concentration chloride snow-thawing agent solution has the greatest impact damage after 150 frost-salt cycles compared with soaking in other different densities (3%, 20%). Mixing appropriate amount of silica fume and high-performance air-entraining agent in concrete can effectively improve the resistance of frost-salt scaling. With the frost-salt cycles increase, the concrete strength and the relative dynamic elastic modulus continues to decrease.

Keywords: Concrete, frost-salt, chloride snow-thawing agent, mechanical properties.