Stability of single phase C3A hydrates against pressurized CO2

J. Plank; M. Zhang-Preße; N. P. Ivleva; R. Niessner

doi:10.1016/j.conbuildmat.2016.06.042

Stability of single phase C₃A hydrates against pressurized CO₂

J. Plank
, M. Zhang-Preße
, N. P. Ivleva
, R. Niessner

Technical University of Munich

Research output: Contribution to journal › Article › peer-review

49 Scopus citations

Abstract

The stability of single phase C₃A hydrates including ettringite, monosulfoaluminate, C₂AH₈, C₄AH₁₃ and katoite (C₃AH₆) against pressurized CO₂ was investigated performed at 20 °C or 50 °C under 7 bar CO₂ for 1–30 days. Raman microspectroscopy, X-ray diffraction, infrared spectroscopy and SEM were utilized to analyze the carbonation products. Ettringite rapidly reacted with CO₂ into gypsum, CaCO₃ and Al(OH)₃ while monosulfoaluminate started to decompose after 15 days into [Ca₂Al(OH₆)]₂(SO₄)_1−x(CO₃)_x-LDH. C₂AH₈, and C₄AH₁₃ were less stable than monosulfoaluminate whereas katoite remained unchanged even after 30 days of CO₂ exposure and presented the most stable hydrate phase of C₃A.

Original language	English
Pages (from-to)	426-434
Number of pages	9
Journal	Construction and Building Materials
Volume	122
DOIs	https://doi.org/10.1016/j.conbuildmat.2016.06.042
State	Published - 2016

Keywords

CA hydrates
CO stability
Ettringite
Monosulfo aluminate
Raman microspectroscopy

Access to Document

10.1016/j.conbuildmat.2016.06.042

Cite this

@article{4afb9457fe314e8fa35206f96ae6c5ed,

title = "Stability of single phase C3A hydrates against pressurized CO2",

abstract = "The stability of single phase C3A hydrates including ettringite, monosulfoaluminate, C2AH8, C4AH13 and katoite (C3AH6) against pressurized CO2 was investigated performed at 20 °C or 50 °C under 7 bar CO2 for 1–30 days. Raman microspectroscopy, X-ray diffraction, infrared spectroscopy and SEM were utilized to analyze the carbonation products. Ettringite rapidly reacted with CO2 into gypsum, CaCO3 and Al(OH)3 while monosulfoaluminate started to decompose after 15 days into [Ca2Al(OH6)]2(SO4)1−x(CO3)x-LDH. C2AH8, and C4AH13 were less stable than monosulfoaluminate whereas katoite remained unchanged even after 30 days of CO2 exposure and presented the most stable hydrate phase of C3A.",

keywords = "CA hydrates, CO stability, Ettringite, Monosulfo aluminate, Raman microspectroscopy",

author = "J. Plank and M. Zhang-Pre{\ss}e and Ivleva, \{N. P.\} and R. Niessner",

note = "Publisher Copyright: {\textcopyright} 2016 Elsevier Ltd",

year = "2016",

doi = "10.1016/j.conbuildmat.2016.06.042",

language = "English",

volume = "122",

pages = "426--434",

journal = "Construction and Building Materials",

issn = "0950-0618",

publisher = "Elsevier Ltd.",

}

TY - JOUR

T1 - Stability of single phase C3A hydrates against pressurized CO2

AU - Plank, J.

AU - Zhang-Preße, M.

AU - Ivleva, N. P.

AU - Niessner, R.

PY - 2016

Y1 - 2016

N2 - The stability of single phase C3A hydrates including ettringite, monosulfoaluminate, C2AH8, C4AH13 and katoite (C3AH6) against pressurized CO2 was investigated performed at 20 °C or 50 °C under 7 bar CO2 for 1–30 days. Raman microspectroscopy, X-ray diffraction, infrared spectroscopy and SEM were utilized to analyze the carbonation products. Ettringite rapidly reacted with CO2 into gypsum, CaCO3 and Al(OH)3 while monosulfoaluminate started to decompose after 15 days into [Ca2Al(OH6)]2(SO4)1−x(CO3)x-LDH. C2AH8, and C4AH13 were less stable than monosulfoaluminate whereas katoite remained unchanged even after 30 days of CO2 exposure and presented the most stable hydrate phase of C3A.

AB - The stability of single phase C3A hydrates including ettringite, monosulfoaluminate, C2AH8, C4AH13 and katoite (C3AH6) against pressurized CO2 was investigated performed at 20 °C or 50 °C under 7 bar CO2 for 1–30 days. Raman microspectroscopy, X-ray diffraction, infrared spectroscopy and SEM were utilized to analyze the carbonation products. Ettringite rapidly reacted with CO2 into gypsum, CaCO3 and Al(OH)3 while monosulfoaluminate started to decompose after 15 days into [Ca2Al(OH6)]2(SO4)1−x(CO3)x-LDH. C2AH8, and C4AH13 were less stable than monosulfoaluminate whereas katoite remained unchanged even after 30 days of CO2 exposure and presented the most stable hydrate phase of C3A.

KW - CA hydrates

KW - CO stability

KW - Ettringite

KW - Monosulfo aluminate

KW - Raman microspectroscopy

UR - https://www.scopus.com/pages/publications/84989159429

U2 - 10.1016/j.conbuildmat.2016.06.042

DO - 10.1016/j.conbuildmat.2016.06.042

M3 - Article

AN - SCOPUS:84989159429

SN - 0950-0618

VL - 122

SP - 426

EP - 434

JO - Construction and Building Materials

JF - Construction and Building Materials

ER -

Stability of single phase C₃A hydrates against pressurized CO₂

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this