Monitoring durability of limestone cement paste stored at conditions promoting thaumasite formation

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378297%3A_____%2F20%3A00535250" target="_blank" >RIV/68378297:_____/20:00535250 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.23967/dbmc.2020.098" target="_blank" >https://doi.org/10.23967/dbmc.2020.098</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.23967/dbmc.2020.098" target="_blank" >10.23967/dbmc.2020.098</a>

Result language
angličtina
Original language name
Monitoring durability of limestone cement paste stored at conditions promoting thaumasite formation
Original language description
The durability of Portland-limestone cement withhigh limestone content was monitored at conditions promoting thaumasite formation. Pore structure and deterioration characteristics were assessed with X-ray micro-computed tomography and correlatedwith material’s strength. Changes in crystalline and amorphous phasesof the cement paste were investigated with X-ray powder diffractionand solid state nuclear magnetic resonance spectroscopy. Rapid deterioration was observed, evolving as a front causingconcentric crack patterns followed by detachment of the part of specimen in contactwith the corrosive solution. Thisultimately led to loss of structural integrity after 4monthsofexposure.During sulfate attack, thaumasite, ettringite and gypsum formed at the expense of portlandite, calcite and monocarboaluminate hydrate. Furthermore, polymerization of silicate chains in C-S-H and deterioration of C-S-H also occurred.
Czech name
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Czech description
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Project
<a href="/en/project/GJ18-26056Y" target="_blank" >GJ18-26056Y: Experimental quantification and modelling of deterioration in Portland-limestone cement pastes affected by thaumasite sulfate attack</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection
Current topics and trends on durability of building materials and components. Proceedings of the XV edition of the international conference on durability of building materials and components (DBMC 2020)
ISBN
978-84-121101-8-0
ISSN
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e-ISSN
—
Number of pages
8
Pages from-to
1039-1046
Publisher name
International Center for Numerical Methods in Engineering (CIMNE)
Place of publication
Barcelona
Event location
Barcelona
Event date
Oct 20, 2020
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
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