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Advances in Materials Science and Engineering - Volume 2014 2014, Article ID 650373, 8 pages -

Research ArticleDepartment of Civil Engineering and Architecture, Nanjing Institute of Technology, Nanjing 211167, China

Received 6 January 2014; Revised 18 March 2014; Accepted 18 March 2014; Published 10 April 2014

Academic Editor: Juan José del Coz Díaz

Copyright © 2014 S. P. Zhang and L. Zong. 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

Environment has significant effects on the water absorption of concrete materials. This paper presents an experimental study of the influence of water absorption on the durability of concrete materials. A detailed analysis is also presented in order to establish useful relationship between them. Concrete specimens of different water absorption were prepared through different curing conditions, and results indicated that curing condition can significantly affect the surface water absorption. SEM photos also showed that different curing conditions caused different microstructure. After 28-days curing, compressive strength, permeability, sulfate attack, and chloride ion diffusion of concrete samples were investigated. As a result, both of surface sorptivity and internal sorptivity have no clear relationship with compressive strength. Results obtained also showed that only surface water absorption related to the performance of concrete including permeability, sulfate attack, and chloride ion diffusion. In addition, both impermeability and resistance to sulfate attack were linearly associated with surface sorptivity, and both correlation coefficients were not less than 0.9. Furthermore, chloride ion diffusion coefficient has exponent relation to surface water absorption with higher correlation coefficient. However, no apparent relationship was found between internal water absorption and durability like impermeability, resistance to sulfate attack, and chloride ion diffusion.





Autor: S. P. Zhang and L. Zong

Fuente: https://www.hindawi.com/



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