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

Natural Sciences

Technische Universität München

Publikation: Beitrag in Fachzeitschrift › Artikel › Begutachtung

38 Zitate (Scopus)

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.

Originalsprache	Englisch
Seiten (von - bis)	426-434
Seitenumfang	9
Fachzeitschrift	Construction and Building Materials
Jahrgang	122
DOIs	https://doi.org/10.1016/j.conbuildmat.2016.06.042
Publikationsstatus	Veröffentlicht - 2016

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10.1016/j.conbuildmat.2016.06.042

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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",

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year = "2016",

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

language = "English",

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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

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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