In this paper, the flowability, compressive strength, hydration heat, porosity and calcium hydroxide content of cement–silica fume–fly ash-based ultra-high-strength concrete (UHSC) incorporating either nano-silica (SiO2) or nano-calcium carbonate (CaCO3) were investigated. Test results showed that the flowability of UHSC was reduced by incorporating nano-silica and nano-calcium carbonate. After incorporating nano-silica, the hydration heat flow of UHSC increased, and the hydration heat of UHSC increased at first but decreased later. For UHSC with nano-calcium carbonate, the hydration heat flow increased and the hydration heat decreased. With the increase of both nano-silica and nano-calcium carbonate content, the compressive strength of UHSC increased at first and then decreased. The porosity decreased at first and increased later with the increase of nano-silica and nano-calcium carbonate content. As regards the calcium hydroxide content, this decreased with the increase of nano-silica content, but increased with the increase of nano-calcium carbonate content.
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October 2016
Research Article|
July 01 2016
Effects of nanomaterials on hardening of cement–silica fume–fly ash-based ultra-high-strength concrete Available to Purchase
Dehui Wang;
Dehui Wang
Post doc
College of Civil Engineering, Hunan University, Changsha, PR China
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Caijun Shi;
Caijun Shi
Professor
College of Civil Engineering, Hunan University, Changsha, PR China (corresponding author: cshi@hnu.edu.cn)
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Zemei Wu;
Zemei Wu
PhD student
College of Civil Engineering, Hunan University, Changsha, PR China; Department of Civil, Architectural and Environmental Engineering, Missouri University of Science and Technology, Rolla, Missouri, USA
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Linmei Wu;
Linmei Wu
PhD student
College of Civil Engineering, Hunan University, Changsha, PR China
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Shuncheng Xiang;
Shuncheng Xiang
PhD student
College of Civil Engineering, Hunan University, Changsha, PR China
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Xiaoying Pan
Xiaoying Pan
PhD student
College of Civil Engineering, Hunan University, Changsha, PR China
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Publisher: Emerald Publishing
Received:
August 24 2015
Revision Received:
March 25 2016
Accepted:
June 03 2016
Online ISSN: 1751-7605
Print ISSN: 0951-7197
ICE Publishing: All rights reserved
2016
Advances in Cement Research (2016) 28 (9): 555–566.
Article history
Received:
August 24 2015
Revision Received:
March 25 2016
Accepted:
June 03 2016
Citation
Wang D, Shi C, Wu Z, Wu L, Xiang S, Pan X (2016), "Effects of nanomaterials on hardening of cement–silica fume–fly ash-based ultra-high-strength concrete". Advances in Cement Research, Vol. 28 No. 9 pp. 555–566, doi: https://doi.org/10.1680/jadcr.15.00080
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