Thermal stability of the phases developed at high-pressure hydrothermal curing of class G cement with different pozzolanic and latent hydraulic additives
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26310%2F22%3APU146939" target="_blank" >RIV/00216305:26310/22:PU146939 - isvavai.cz</a>
Result on the web
<a href="https://link.springer.com/article/10.1007/s10973-022-11254-2" target="_blank" >https://link.springer.com/article/10.1007/s10973-022-11254-2</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/s10973-022-11254-2" target="_blank" >10.1007/s10973-022-11254-2</a>
Alternative languages
Result language
angličtina
Original language name
Thermal stability of the phases developed at high-pressure hydrothermal curing of class G cement with different pozzolanic and latent hydraulic additives
Original language description
Multicomponent cement pastes based on the Class G cement substituted by 30 mass% of binary or ternary mixtures of silica fume (SF), metakaolin (MK), and ground granulated blast-furnace slag (BFS) were submitted to hydrothermal curing at 150 degrees C and 18 MPa for 7 days. X-ray diffraction (XRD), Fourier Transform Infrared analyses in the mid-IR region (FTIR), and thermogravimetric-differential scanning calorimetry (TGA/DSC) were performed for evaluation of phase compositions and to assess their relation to compressive strength. The highest amount of mainly amorphous thermal stable C-S-H and C-A-(S)-H phases with the highest polymerization degree was formed by using 15 mass% SF-15 mass% MK mixture, which led to the lowest CaO/SiO2 (C/S) ratio and the highest compressive strength. Crystalline phases detected in this sample were also thermal stable tobermorite, hibschite, and katoite. The increase in the C/S ratio, as well as slowly reacting BFS, resulted in the transformation of polymerized structures of hydration products to the smaller units and lower degree of hydration followed by decreased compressive strength values. Undesired formation of crystalline alpha-C2SH, occurring also in the paste without additives addition, was proved in the composition with a higher amount of BFS and higher C/S ratio.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20303 - Thermodynamics
Result continuities
Project
<a href="/en/project/GA19-16646S" target="_blank" >GA19-16646S: The elimination of the negative impact of zinc in Portland cement by accelerating concrete admixtures</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Journal of Thermal Analysis and Calorimetry
ISSN
1388-6150
e-ISSN
1588-2926
Volume of the periodical
147
Issue of the periodical within the volume
18
Country of publishing house
HU - HUNGARY
Number of pages
12
Pages from-to
9891-9902
UT code for WoS article
000758983300002
EID of the result in the Scopus database
2-s2.0-85124876620