A Comparative Study of Factors Influencing Hydration Stoppage of Hardened Cement Paste

Alexander Mezhov, Daniele Kulisch, Antonina Goncharov and Semion Zhutovsky ()
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Alexander Mezhov: Division of Technology of Construction Materials, Bundesanstalt für Materialforschung und -prüfung (BAM), 12205 Berlin, Germany
Daniele Kulisch: Faculty of Civil and Environmental Engineering, Technion–Israel Institute of Technology, Haifa 3200003, Israel
Antonina Goncharov: Faculty of Civil and Environmental Engineering, Technion–Israel Institute of Technology, Haifa 3200003, Israel
Semion Zhutovsky: Faculty of Civil and Environmental Engineering, Technion–Israel Institute of Technology, Haifa 3200003, Israel

Sustainability, 2023, vol. 15, issue 2, 1-21

Abstract: There is no consensus on which hydration stoppage method is optimal to preserve the microstructure and mineral composition of samples, especially considering the specific aspects of different testing methods, such as TGA, MIP, or XRD. This paper presents a quantitative comparison between the most popular hydration stoppage strategies and parameters such as the sample piece size, the soaking time in a solvent, and the type, as examined on cement paste hydrated for 7 days. It was found that the carbonation appears either for samples smaller than 2.36 mm and bigger than 4.75 mm or samples soaked in a solvent for longer than 1 h. Fast solvent replacement leads to ettringite diminution and total pore volume increase. Among others, solvent replacement with subsequent gentle heating under a vacuum was found to be the most efficient, whereas it was experimentally demonstrated that isopropyl alcohol stops hydration faster than ethanol and acetone.

Keywords: hydration stoppage; solvent replacement; soaking time; sample piece size (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2023
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