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Accelerated carbonation of hardened cement paste: Quantification of calcium carbonate via ATR infrared spectroscopy

Kalkreuth, Jonas 1; Ullrich, Angela 1; Garbev, Krassimir ORCID iD icon 1; Merz, Daniela 1; Stemmermann, Peter ORCID iD icon 1; Stapf, Dieter 1
1 Institut für Technische Chemie (ITC), Karlsruher Institut für Technologie (KIT)

Abstract (englisch):

In context of carbon capture and storage in cement and concrete industry, there
is a strong demand for fast, reliable, and low-cost CO2 quantification methods.
Attenuated total reflection infrared spectroscopy (ATR-IR) in conjunction
with multivariate calibration via partial-least-squares regression was applied to
quantify CaCO3 in carbonated hardened Portland cement pastes, as this method
shows great potential in the field of process control. Thermogravimetric analysis
coupled with infrared spectrometry for the detection of the evolving gases was
used as a reference for quantification. Three methods for the quantitative analysis
with different partial-least-squares parameters were developed on a series of
ground physicalmixtures of slightly carbonated and highly carbonated hydrated
cement pastes that had absorbed up to 77% of the theoretical capacity for CO2.
Additional samples for optimization and validation of the method were prepared
by accelerated carbonation of cylindrical slices of hardened cement paste as a
function of exposure time. In these experiments, the major CO2 uptake occurs in
the first 60 min until the formation of CaCO3 layers limits the diffusion of CO2
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Verlagsausgabe §
DOI: 10.5445/IR/1000164033
Veröffentlicht am 09.11.2023
Originalveröffentlichung
DOI: 10.1111/jace.19546
Scopus
Zitationen: 4
Web of Science
Zitationen: 4
Dimensions
Zitationen: 4
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Technische Chemie (ITC)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2024
Sprache Englisch
Identifikator ISSN: 0002-7820, 1551-2916
KITopen-ID: 1000164033
HGF-Programm 38.05.02 (POF IV, LK 01) Metals and Minerals Cycle
Erschienen in Journal of the American Ceramic Society
Verlag American Ceramic Society
Band 107
Heft 4
Seiten 2627-2640
Projektinformation URBAN (BMWK, 03EE5130A)
Vorab online veröffentlicht am 06.11.2023
Schlagwörter ATR-IR spectroscopy, carbonation, cement pastes, multivariate partial-least-squares regression,, TG-FTIR
Nachgewiesen in Dimensions
Scopus
Web of Science
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