13C,27Al and 29Si NMR investigation of the hydration kinetics of Portland-limestone cement pastes containing CH3-COO¯-R+(R=H or Na) additives
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378297%3A_____%2F22%3A00555838" target="_blank" >RIV/68378297:_____/22:00555838 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.3390/ma15062004" target="_blank" >https://doi.org/10.3390/ma15062004</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.3390/ma15062004" target="_blank" >10.3390/ma15062004</a>
Alternative languages
Result language
angličtina
Original language name
13C,27Al and 29Si NMR investigation of the hydration kinetics of Portland-limestone cement pastes containing CH3-COO¯-R+(R=H or Na) additives
Original language description
The hydration kinetics of Portland-limestone cement pastes with organic additives in the form of acetic acid and sodium acetate were studied by using solid-state 13C, 27Al and 29Si NMR spectroscopy. The evolution of the relative content of various phases was monitored over the period of one month: amorphous and crystalline calcite (in 13C spectra), ettringite, aluminum in C-S-H gel, calcium aluminates and calcium hydroaluminates (in 27Al spectra), as well as alite, belite and siliconnin C-S-H gel (in 29Si spectra). The retarding effect of the additives on cement hydration at early age was demonstrated. We show that the kinetics of phase assemblage formation is influenced by the acetate ion adsorption on the surface of the anhydrous cement components and hydrated phases. The kinetics of formation of ettringite in the cement paste, depending on the addition of acetic and or sodium acetate, is discussed in the context of potential thaumasite sulfate attack.
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
20501 - Materials engineering
Result continuities
Project
<a href="/en/project/GC21-35772J" target="_blank" >GC21-35772J: Microstructural changes in Portland-limestone cement pastes under the combined effect of sulfate and chloride ions</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
Materials
ISSN
1996-1944
e-ISSN
1996-1944
Volume of the periodical
15
Issue of the periodical within the volume
6
Country of publishing house
CH - SWITZERLAND
Number of pages
13
Pages from-to
2004
UT code for WoS article
000774907300001
EID of the result in the Scopus database
2-s2.0-85126448095