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Advances in Materials Science and Engineering
Volume 2017, Article ID 3452493, 11 pages
https://doi.org/10.1155/2017/3452493
Research Article

Effects of Mixing and Curing Temperature on the Strength Development and Pore Structure of Fly Ash Blended Mass Concrete

1Department of Architectural Engineering, College of Engineering, Kangwon National University, Chuncheon-si, Republic of Korea
2Department of Architecture, Graduate School of Engineering, The University of Tokyo, Tokyo, Japan

Correspondence should be addressed to Ki-Bong Park; rk.ca.nowgnak@krapbk

Received 19 December 2016; Accepted 1 March 2017; Published 20 March 2017

Academic Editor: Xiao-Jian Gao

Copyright © 2017 Ki-Bong Park and Takafumi Noguchi. 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 aim of this work is to know clearly the effects of temperature in response to curing condition, hydration heat, and outside weather conditions on the strength development of high-performance concrete. The concrete walls were designed using three different sizes and three different types of concrete. The experiments were conducted under typical summer and winter weather conditions. Temperature histories at different locations in the walls were recorded and the strength developments of concrete at those locations were measured. The main factors investigated that influence the strength developments of the obtained samples were the bound water contents, the hydration products, and the pore structure. Testing results indicated that the elevated summer temperatures did not affect the early-age strength gain of concrete made using ordinary Portland cement. Strength development was significantly increased at early ages in concrete made using belite-rich Portland cement or with the addition of fly ash. The elevated temperatures resulted in a long-term strength loss in both belite-rich and fly ash containing concrete. The long-term strength loss was caused by a reduction in the degree of hydration and an increase in the total porosity and amount of smaller pores in the material.