Quantification of microstructural changes in limestone cement paste stored in sulfate environment at low temperature

Sotiriadis, Konstantinos; Hlobil, Michal; Machová, Dita; Mácová, Petra; Viani, Alberto; Vopálenský, Michal

doi:https://dx.doi.org/10.4028/www.scientific.net/SSP.309.3

Počet záznamů: 1

Quantification of microstructural changes in limestone cement paste stored in sulfate environment at low temperature

1.

SYSNO ASEP	0532112
Druh ASEP	C - Konferenční příspěvek (mezinárodní konf.)
Zařazení RIV	D - Článek ve sborníku
Název	Quantification of microstructural changes in limestone cement paste stored in sulfate environment at low temperature
Tvůrce(i)	Sotiriadis, Konstantinos (UTAM-F)_{RID, ORCID, SAI} Hlobil, Michal (UTAM-F)_{RID, SAI, ORCID} Machová, Dita (UTAM-F)_{RID, ORCID, SAI} Mácová, Petra (UTAM-F)_{RID, SAI, ORCID} Viani, Alberto (UTAM-F)_{RID, ORCID, SAI} Vopálenský, Michal (UTAM-F)_{RID, ORCID, SAI}
Celkový počet autorů	6
Zdroj.dok.	Solid State Phenomena, 26th International Conference Concrete Days, 309. - Baech : Trans Tech Publications, 2020 / Nenadálová Š. ; Johová P. - ISSN 1012-0394 - ISBN 978-3-0357-1668-9
Rozsah stran	s. 3-7
Poč.str.	5 s.
Forma vydání	Tištěná - P
Akce	International Conference Concrete Days /26./
Datum konání	20.11.2019 - 21.11.2019
Místo konání	Hradec Králové
Země	CZ - Česká republika
Typ akce	EUR
Jazyk dok.	eng - angličtina
Země vyd.	CH - Švýcarsko
Klíč. slova	limestone cement ; sulfates ; microstructure ; X-ray tomography
Vědní obor RIV	JN - Stavebnictví
Obor OECD	Materials engineering
CEP	GJ18-26056Y GA ČR - Grantová agentura ČR
Způsob publikování	Omezený přístup
Institucionální podpora	UTAM-F - RVO:68378297
EID SCOPUS	85090294025
DOI	10.4028/www.scientific.net/SSP.309.3
Anotace	Portland-limestone cement paste specimens were stored in magnesium sulfate solution at 5°C for 6 months, the occurring microstructural changes have been monitored on a monthly basis. Extent of deterioration was quantitatively assessed with different techniques. The X-ray microcomputed tomography was employed to describe non-invasively the pore structure and extend of deterioration. X-ray powder diffraction and infrared spectroscopy were used to characterize the phase changes occurred in the course of the sulfate attack. Compressive strength tests reflected the effect of the process on mechanical performance. The results indicate the rapid degradation of the system, owing, mainly, to crack formation, expansion, and finally loss of cohesion between the deteriorated parts of the specimens and the sound cement matrix, as a consequence of the formation of new phases. The progress of an irregular deterioration front was observed. The presence of complex phases (thaumasite, ettringite) was proved, however, the deteriorated parts of the specimens mostly consisted of gypsum.
Pracoviště	Ústav teoretické a aplikované mechaniky
Kontakt	Kulawiecová Kateřina, kulawiecova@itam.cas.cz, Tel.: 225 443 285
Rok sběru	2021
Elektronická adresa	https://doi.org/10.4028/www.scientific.net/SSP.309.3

Počet záznamů: 1