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Open AccessArticle

Effect of Admixtures on the Yield Stresses of Cement Pastes under High Hydrostatic Pressures

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Department of Construction and Disaster Prevention Engineering, Kyungpook National University, Sangju 37224, Korea
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School of Urban and Environmental Engineering, Ulsan National Institute of Science and Technology, Ulsan 44919, Korea
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Department of Civil and Environmental Engineering, Myongji University, Yongin 17058, Korea
*
Author to whom correspondence should be addressed.
Academic Editor: Jorge de Brito
Materials 2016, 9(3), 147; https://doi.org/10.3390/ma9030147
Received: 11 January 2016 / Revised: 18 February 2016 / Accepted: 19 February 2016 / Published: 2 March 2016
When cement-based materials are transported at a construction site, they undergo high pressures during the pumping process. The rheological properties of the materials under such high pressures are unknown, and estimating the workability of the materials after pumping is a complex problem. Among various influential factors on the rheology of concrete, this study investigated the effect of mineral and chemical admixtures on the high-pressure rheology. A rheometer was fabricated that could measure the rheological properties while maintaining a high pressure to simulate the pumping process. The effects of superplasticizer, silica fume, nanoclay, fly ash, or ground granulated blast furnace slag were investigated when mixed with two control cement pastes. The water-to-cement ratios were 0.35 and 0.50. View Full-Text
Keywords: pumped concrete; cement paste; high pressure; yield stress; rheology; admixture pumped concrete; cement paste; high pressure; yield stress; rheology; admixture
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Yim, H.J.; Kim, J.H.; Kwon, S.H. Effect of Admixtures on the Yield Stresses of Cement Pastes under High Hydrostatic Pressures. Materials 2016, 9, 147.

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