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The Scientific World Journal
Volume 2014, Article ID 406324, 11 pages
http://dx.doi.org/10.1155/2014/406324
Research Article

Feasibility Tests on Concrete with Very-High-Volume Supplementary Cementitious Materials

1Department of Plant Architectural Engineering, Kyonggi University, Suwon-si, Gyeonggi-do 443-760, Republic of Korea
2Department of Architectural Engineering, Graduate School, Kyonggi University, Suwon-si, Gyeonggi-do 443-760, Republic of Korea

Received 1 June 2014; Accepted 17 July 2014; Published 6 August 2014

Academic Editor: Mohammed Maslehuddin

Copyright © 2014 Keun-Hyeok Yang and Yong-Su Jeon. 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

The objective of this study is to examine the compressive strength and durability of very high-volume SCM concrete. The prepared 36 concrete specimens were classified into two groups according to their designed 28-day compressive strength. For the high-volume SCM, the FA level was fixed at a weight ratio of 0.4 and the GGBS level varied between the weight ratio of 0.3 and 0.5, which resulted in 70–90% replacement of OPC. To enhance the compressive strength of very high-volume SCM concrete at an early age, the unit water content was controlled to be less than 150 kg/m3, and a specially modified polycarboxylate-based water-reducing agent was added. Test results showed that as SCM ratio ( ) increased, the strength gain ratio at an early age relative to the 28-day strength tended to decrease, whereas that at a long-term age increased up to of 0.8, beyond which it decreased. In addition, the beneficial effect of SCMs on the freezing-and-thawing and chloride resistances of the concrete decreased at of 0.9. Hence, it is recommended that needs to be restricted to less than 0.8–0.85 in order to obtain a consistent positive influence on the compressive strength and durability of SCM concrete.