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Advances in Materials Science and Engineering
Volume 2017, Article ID 3892683, 10 pages
https://doi.org/10.1155/2017/3892683
Research Article

Micropore Structures in Cenosphere-Containing Cementitious Materials Using Micro-CT

Department of Civil Engineering, Kyonggi University, 154-42 Gwanggyosan-ro, Yeongtong-gu, Suwon 16227, Republic of Korea

Correspondence should be addressed to Seyoon Yoon; moc.liamg@nooyesnooy

Received 21 March 2017; Accepted 3 May 2017; Published 11 June 2017

Academic Editor: Xiao-Yong Wang

Copyright © 2017 Seyoon Yoon and Inhwan Park. 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

Cenospheres have been recently applied to increase the volume of uniform micropores in hardened cementitious materials. Therefore, application of micro-CT to cenosphere-containing binders will help better understand the micropores formed by cenospheres in the hardened materials. Accordingly, the present study prepared Portland cement paste, alkali-activated fly ash/silica fume, and alkali-activated fly ash with 60% weight replacement by cenospheres and reconstructed their micropore structures using micro-CT. From the pore structure, individual micropores were extracted and analyzed using the principal moment ratios ( and ). Based on the moment ratios, the representative pore shapes were determined in the different pore-volume ranges. Four-factor pore compliance contribution (4-factor PCC) model was then applied to predict the influences of the micropores on the elastic moduli of the micropore/matrix composites.