RESEARCH ARTICLE


Experimental Research on the Wettability of Recycled Aggregate Concrete with Fly Ash



Yuanchen Guo*, 1, 2, Xue Wang2, Jueshi Qian1
1 College of Materials Science and Engineering,Chongqing University, No.174, Shazheng Street, Shapingba District, Chongqing 400030, China
2 College of Civil Engineering, Chongqing Three Gorges University, 780 ShaLong Road, Wanzhou District, Chongqing City 404100,China


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© 2013 Gou 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 College of Materials Science and Engineering,Chongqing University, No.174, Shazheng Street, Shapingba District, Chongqing 400030, China; Tel: +8615025576096; Fax: +86 23 58102281; E-mail: gyc1982@aliyun.com


Abstract

Material adsorption, the reverse process of evaporation diffusion, directly reflects the wettability of materials. Wettability is one of the main factors that affect the drying shrinkage of materials. A device that measures the wettability of recycled aggregate concrete (RAC) with fly ash is proposed in this study based on pore structure theory. The isothermal absorption curve of RAC is examined with different fly ash contents. Results show that as the recycled aggregate replacement rate increases, the moisture absorption capacity of RAC gradually increases. The addition of fly ash improves the porosity of RAC structures and reduces material wettability.

Keywords: Recycled aggregate concrete, wettability, fly ash, drying shrinkage, experimental research.