Study of interfacial transition zone in concrete with SCMs

D 2022

Study of interfacial transition zone in concrete with SCMs

KREJČÍ KOTLÁNOVÁ, Michaela; Z. DOLNICEK; M. DZUROV; D. KUBATOVA; A. ZEZULOVA et. al.

Základní údaje

Originální název

Study of interfacial transition zone in concrete with SCMs

Autoři

KREJČÍ KOTLÁNOVÁ, Michaela (203 Česká republika, domácí); Z. DOLNICEK; M. DZUROV; D. KUBATOVA; A. ZEZULOVA a M. BOHAC

Vydání

Bristol, 25th International Conference Building Materials, Products and Technologies, ICBMPT 2022, od s. 1-10, 10 s. 2022

Nakladatel

IOP Publishing Ltd

Další údaje

Jazyk

angličtina

Typ výsledku

Stať ve sborníku

Obor

10505 Geology

Stát vydavatele

Velká Británie a Severní Irsko

Utajení

není předmětem státního či obchodního tajemství

Forma vydání

tištěná verze "print"

Odkazy

URL

Organizační jednotka

Přírodovědecká fakulta

ISSN

DOI

https://doi.org/10.1088/1742-6596/2341/1/012004

UT WoS

001293886900004

EID Scopus

2-s2.0-85140247369

Klíčová slova anglicky

interfacial transition zone; concrete; Portland cement; powdered limestone

Štítky

rivok

Příznaky

Mezinárodní význam, Recenzováno

Změněno: 22. 9. 2025 08:37, Mgr. Marie Novosadová Šípková, DiS.

Anotace

V originále

The interfacial transition zone is one of the weakest areas in concrete. Microcracks and new phases often form in this zone, affecting the resulting concrete's mechanical properties. In this research, concrete in which Portland cement was partially replaced by powdered limestone and/or metakaolin was cured for 1 and 28 days and then mechanical properties were tested. The interfacial transition zone was studied by scanning electron microscopy and selected phases were analyzed by electron microprobe. The addition of a small amount of limestone or metakaolin increases the strength of the concrete. The strength significantly decreases with a content of 10% or more supplementary cementitious materials (SCMs) in concrete. The microcrack's thickness at the binder-aggregate interface reaches up to 0.8 mu m. In concretes with limestone, rhombohedral calcite crystals up to 0.5 mu m in size accumulate in the interfacial zone. This accumulation can significantly reduce the strength of the concrete when the amount of limestone is high. Zeolites with a composition corresponding to Mg-mazzite are formed at the interface of cement paste, quartz and albite, partially replaced by sericite.

Citovat

KREJČÍ KOTLÁNOVÁ, Michaela; Z. DOLNICEK; M. DZUROV; D. KUBATOVA; A. ZEZULOVA a M. BOHAC. Study of interfacial transition zone in concrete with SCMs. In 25th International Conference Building Materials, Products and Technologies, ICBMPT 2022. Bristol: IOP Publishing Ltd, 2022, s. 1-10. ISSN 1742-6588. Dostupné z: https://doi.org/10.1088/1742-6596/2341/1/012004.

@inproceedings{2520397,
   author = {Krejčí Kotlánová, Michaela and Dolnicek, Z. and Dzurov, M. and Kubatova, D. and Zezulova, A. and Bohac, M.},
   address = {Bristol},
   booktitle = {25th International Conference Building Materials, Products and Technologies, ICBMPT 2022},
   doi = {https://doi.org/10.1088/1742-6596/2341/1/012004},
   keywords = {interfacial transition zone; concrete; Portland cement; powdered limestone},
   howpublished = {tištěná verze "print"},
   language = {eng},
   location = {Bristol},
   pages = {1-10},
   publisher = {IOP Publishing Ltd},
   title = {Study of interfacial transition zone in concrete with SCMs},
   url = {https://iopscience.iop.org/article/10.1088/1742-6596/2341/1/012004},
   year = {2022}
}

TY  - CONF
ID  - 2520397
AU  - Krejčí Kotlánová, Michaela - Dolnicek, Z. - Dzurov, M. - Kubatova, D. - Zezulova, A. - Bohac, M.
PY  - 2022
TI  - Study of interfacial transition zone in concrete with SCMs
PB  - IOP Publishing Ltd
CY  - Bristol
KW  - interfacial transition zone
KW  - concrete
KW  - Portland cement
KW  - powdered limestone
UR  - https://iopscience.iop.org/article/10.1088/1742-6596/2341/1/012004
N2  - The interfacial transition zone is one of the weakest areas in concrete. Microcracks and new phases often form in this zone, affecting the resulting concrete's mechanical properties. In this research, concrete in which Portland cement was partially replaced by powdered limestone and/or metakaolin was cured for 1 and 28 days and then mechanical properties were tested. The interfacial transition zone was studied by scanning electron microscopy and selected phases were analyzed by electron microprobe. The addition of a small amount of limestone or metakaolin increases the strength of the concrete. The strength significantly decreases with a content of 10% or more supplementary cementitious materials (SCMs) in concrete. The microcrack's thickness at the binder-aggregate interface reaches up to 0.8 mu m. In concretes with limestone, rhombohedral calcite crystals up to 0.5 mu m in size accumulate in the interfacial zone. This accumulation can significantly reduce the strength of the concrete when the amount of limestone is high. Zeolites with a composition corresponding to Mg-mazzite are formed at the interface of cement paste, quartz and albite, partially replaced by sericite.
ER  -

KREJČÍ KOTLÁNOVÁ, Michaela; Z. DOLNICEK; M. DZUROV; D. KUBATOVA; A. ZEZULOVA a M. BOHAC. Study of interfacial transition zone in concrete with SCMs. In \textit{25th International Conference Building Materials, Products and Technologies, ICBMPT 2022}. Bristol: IOP Publishing Ltd, 2022, s.~1-10. ISSN~1742-6588. Dostupné z: https://doi.org/10.1088/1742-6596/2341/1/012004.

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