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Open AccessArticle

Estimation of Hydration Degree of Blended Cements with the Help of k-Values

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University Centre for Energy Efficient Buildings, Czech Technical University in Prague, Třinecká 1024, 273 43 Buštěhrad, Czech Republic
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Faculty of Civil Engineering, Czech Technical University in Prague, Thakurova 6, 166 29 Prague 6, Czech Republic
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Faculty of Civil Engineering, Mechanics and Petrochemistry, Warsaw University of Technology, Lukasiewicza St. 17, 09-400 Plock, Poland
*
Author to whom correspondence should be addressed.
Materials 2019, 12(15), 2420; https://doi.org/10.3390/ma12152420
Received: 23 June 2019 / Revised: 19 July 2019 / Accepted: 27 July 2019 / Published: 29 July 2019
The growing utilization of various mineral additives in the building industry has caused concern worldwide to reduce the emissions of carbon dioxide from Portland cement (OPC) production. The present paper is focused on the determination of the degree of hydration of blended binding systems based on Portland cement. Blast furnace slag, fly ash, and ceramic powder are used in the study; they are applied by 12.5 wt.% up to 50% of OPC replacement. The evolution of the hydration process is monitored using thermogravimetry in selected time intervals to determine the degree of hydration; its ultimate value is obtained from numerical estimation using the Michaelis-Menten equation. However, due to the application of active mineral additives, the correction in terms of equivalent binder is conducted. Corrected values of the degree of hydration exhibit good fit with compressive strength. View Full-Text
Keywords: supplementary cementitious materials; fly ash; blast furnace slag; ceramic powder; degree of hydration; thermogravimetry supplementary cementitious materials; fly ash; blast furnace slag; ceramic powder; degree of hydration; thermogravimetry
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Reiterman, P.; Holčapek, O.; Davidová, V.; Jaskulski, R.; Keppert, M. Estimation of Hydration Degree of Blended Cements with the Help of k-Values. Materials 2019, 12, 2420.

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