Study of interfacial transition zone in concrete with SCMs

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F22%3A00142075" target="_blank" >RIV/00216224:14310/22:00142075 - isvavai.cz</a>
Result on the web
<a href="https://iopscience.iop.org/article/10.1088/1742-6596/2341/1/012004" target="_blank" >https://iopscience.iop.org/article/10.1088/1742-6596/2341/1/012004</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1088/1742-6596/2341/1/012004" target="_blank" >10.1088/1742-6596/2341/1/012004</a>

Result language
angličtina
Original language name
Study of interfacial transition zone in concrete with SCMs
Original language description
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.
Czech name
—
Czech description
—

Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection
25th International Conference Building Materials, Products and Technologies, ICBMPT 2022
ISBN
—
ISSN
1742-6588
e-ISSN
1742-6596
Number of pages
10
Pages from-to
1-10
Publisher name
IOP Publishing Ltd
Place of publication
Bristol
Event location
Telc, CZECH REPUBLIC
Event date
Sep 1, 2022
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
001293886900004

Similar results(10)