Effect of monocarboaluminate carbonation on mechanical
properties and microstructure of lime-metakaolin mortars

J 2025

Effect of monocarboaluminate carbonation on mechanical properties and microstructure of lime-metakaolin mortars

VYSVARIL, Martin; Michal KRISTOF; Tomas ZIZLAVSKY; Patrik BAYER; Karel DVORAK et. al.

Basic information

Original name

Effect of monocarboaluminate carbonation on mechanical properties and microstructure of lime-metakaolin mortars

Authors

VYSVARIL, Martin; Michal KRISTOF; Tomas ZIZLAVSKY; Patrik BAYER; Karel DVORAK; Zdeněk MORAVEC (203 Czech Republic, belonging to the institution) and Edyta SPYCHAL

Edition

CONSTRUCTION AND BUILDING MATERIALS, London, ELSEVIER SCI LTD, 2025, 0950-0618

Other information

Language

English

Type of outcome

Article in a journal

Field of Study

10402 Inorganic and nuclear chemistry

Country of publisher

United Kingdom of Great Britain and Northern Ireland

Confidentiality degree

is not subject to a state or trade secret

References:

URL

Impact factor

Impact factor: 8.000 in 2024

Organization unit

Faculty of Science

DOI

https://doi.org/10.1016/j.conbuildmat.2025.143034

UT WoS

001558375800001

EID Scopus

2-s2.0-105012863517

Keywords in English

Monocarboaluminate; Carbonation; Metakaolin; Vaterite; Aragonite; Aluminum hydroxide

Abstract

In the original language

In order to improve the properties of fresh and hardened lime mortars, hydraulic or pozzolanic materials have been added to air lime since ancient times. It has been observed through laboratory research and in practice that some lime-pozzolan mortars, especially lime-metakaolin mortars, deteriorate in their properties over time. Although the instability of calcium aluminate hydrates in an alkaline environment has been the main explanation for this deterioration, it can be assumed that the carbonation of the monocarboaluminate also has a significant influence, as confirmed in this paper. The consequences of carbonation of lime-metakaolin mortars with five different types of metakaolin in three doses, with the aim of confirming the carbonation products of monocarboaluminate and determining the influence of the metakaolin composition and its dose on the formation of monocarboaluminate were investigated in the framework of an experimental analysis. The carbonation of monocarboaluminate was confirmed with the formation of metastable forms of calcium carbonate (aragonite and vaterite) and cryptocrystalline aluminum hydroxide, identified mainly by X-ray diffraction analysis, thermogravimetry, 27Al MAS NMR spectroscopy and scanning electron microscopy. As a result of the carbonation of monocarboaluminate, the porosity of the mortars increased because the reaction products have a smaller molar volume than the reactants, resulting in a decrease in flexural and compressive strength. Metakaolin with a higher amorphous Al2O3 content than 29 % may present a risk of deterioration in the properties of lime-metakaolin mortars.

Cite

VYSVARIL, Martin; Michal KRISTOF; Tomas ZIZLAVSKY; Patrik BAYER; Karel DVORAK; Zdeněk MORAVEC and Edyta SPYCHAL. Effect of monocarboaluminate carbonation on mechanical properties and microstructure of lime-metakaolin mortars. CONSTRUCTION AND BUILDING MATERIALS. London: ELSEVIER SCI LTD, 2025, vol. 492, SEP, p. 1-13. ISSN 0950-0618. Available from: https://doi.org/10.1016/j.conbuildmat.2025.143034.

@article{2520859,
   author = {Vysvaril, Martin and Kristof, Michal and Zizlavsky, Tomas and Bayer, Patrik and Dvorak, Karel and Moravec, Zdeněk and Spychal, Edyta},
   article_location = {London},
   article_number = {SEP},
   doi = {https://doi.org/10.1016/j.conbuildmat.2025.143034},
   keywords = {Monocarboaluminate; Carbonation; Metakaolin; Vaterite; Aragonite; Aluminum hydroxide},
   language = {eng},
   issn = {0950-0618},
   journal = {CONSTRUCTION AND BUILDING MATERIALS},
   title = {Effect of monocarboaluminate carbonation on mechanical properties and microstructure of lime-metakaolin mortars},
   url = {https://www.sciencedirect.com/science/article/pii/S095006182503185X?via%3Dihub#ack0005},
   volume = {492},
   year = {2025}
}

TY  - JOUR
ID  - 2520859
AU  - Vysvaril, Martin - Kristof, Michal - Zizlavsky, Tomas - Bayer, Patrik - Dvorak, Karel - Moravec, Zdeněk - Spychal, Edyta
PY  - 2025
TI  - Effect of monocarboaluminate carbonation on mechanical properties and microstructure of lime-metakaolin mortars
JF  - CONSTRUCTION AND BUILDING MATERIALS
VL  - 492
IS  - SEP
SP  - 1-13
EP  - 1-13
PB  - ELSEVIER SCI LTD
SN  - 09500618
KW  - Monocarboaluminate
KW  - Carbonation
KW  - Metakaolin
KW  - Vaterite
KW  - Aragonite
KW  - Aluminum hydroxide
UR  - https://www.sciencedirect.com/science/article/pii/S095006182503185X?via%3Dihub#ack0005
N2  - In order to improve the properties of fresh and hardened lime mortars, hydraulic or pozzolanic materials have been added to air lime since ancient times. It has been observed through laboratory research and in practice that some lime-pozzolan mortars, especially lime-metakaolin mortars, deteriorate in their properties over time. Although the instability of calcium aluminate hydrates in an alkaline environment has been the main explanation for this deterioration, it can be assumed that the carbonation of the monocarboaluminate also has a significant influence, as confirmed in this paper. The consequences of carbonation of lime-metakaolin mortars with five different types of metakaolin in three doses, with the aim of confirming the carbonation products of monocarboaluminate and determining the influence of the metakaolin composition and its dose on the formation of monocarboaluminate were investigated in the framework of an experimental analysis. The carbonation of monocarboaluminate was confirmed with the formation of metastable forms of calcium carbonate (aragonite and vaterite) and cryptocrystalline aluminum hydroxide, identified mainly by X-ray diffraction analysis, thermogravimetry, 27Al MAS NMR spectroscopy and scanning electron microscopy. As a result of the carbonation of monocarboaluminate, the porosity of the mortars increased because the reaction products have a smaller molar volume than the reactants, resulting in a decrease in flexural and compressive strength. Metakaolin with a higher amorphous Al2O3 content than 29 % may present a risk of deterioration in the properties of lime-metakaolin mortars.
ER  -

VYSVARIL, Martin; Michal KRISTOF; Tomas ZIZLAVSKY; Patrik BAYER; Karel DVORAK; Zdeněk MORAVEC and Edyta SPYCHAL. Effect of monocarboaluminate carbonation on mechanical properties and microstructure of lime-metakaolin mortars. \textit{CONSTRUCTION AND BUILDING MATERIALS}. London: ELSEVIER SCI LTD, 2025, vol.~492, SEP, p.~1-13. ISSN~0950-0618. Available from: https://doi.org/10.1016/j.conbuildmat.2025.143034.

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