Early hydration of C4AF with silica fume and its role on
katoite composition

J 2024

Early hydration of C4AF with silica fume and its role on katoite composition

BOHÁČ, Martin; Anežka ZEZULOVÁ; Michaela KREJČÍ KOTLÁNOVÁ; Dana KUBÁTOVÁ; Theodor STANĚK et. al.

Základní údaje

Originální název

Early hydration of C4AF with silica fume and its role on katoite composition

Autoři

BOHÁČ, Martin; Anežka ZEZULOVÁ; Michaela KREJČÍ KOTLÁNOVÁ; Dana KUBÁTOVÁ; Theodor STANĚK; Zdeněk KREJZA; Dalibor VŠIANSKÝ; Radek NOVOTNÝ; Jakub PALOVČÍK a Karel DVOŘÁK

Vydání

Journal of Microscopy, Wiley, 2024, 0022-2720

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

20101 Civil engineering

Stát vydavatele

Spojené státy

Utajení

není předmětem státního či obchodního tajemství

Odkazy

URL

Impakt faktor

Impact factor: 1.900

Kód RIV

RIV/00216224:14310/24:00138666

Organizační jednotka

Přírodovědecká fakulta

DOI

https://doi.org/10.1111/jmi.13280

UT WoS

001177648400001

EID Scopus

2-s2.0-85186620066

Klíčová slova anglicky

C(4)AF; hydration; katoite; microstructure; silica fume

Štítky

14315010, rivok

Příznaky

Mezinárodní význam, Recenzováno

Změněno: 28. 1. 2025 09:59, Mgr. Marie Novosadová Šípková, DiS.

Anotace

V originále

4AF is considered the least reactive main clinker phase, but its reactivity may be affected by adding supplementary cementitious materials (SCMs). Pure C4AF was synthesised in a laboratory furnace, and the role of silica fume without gypsum on its early hydration properties was monitored. Burning was carried out in four stages to achieve 99% purity of C4AF. Heat flow development was monitored by isothermal calorimetry over 7 days of hydration at 20°C and 40°C. The role of silica fume on hydrogarnet phase katoite (Ca3Al2(SiO4)3 – x(OH)4x x = 1.5–3) formation during early hydration was studied. Rapid dissolution of C4AF, formation of metastable C-(A,F)-H and its conversion to C3(A, F)H6 was evidenced by isothermal calorimetry as a large exotherm. Changes in microstructure during early hydration were documented by SE micrographs, EDS point analyses, X-ray mapping and line scans by SEM-EDS. The phase composition was characterised by DTA-TGA and QXRD after 7 days of hydration. The katoite diffraction pattern is similar for the reference sample and sample with silica fume, but substitution in its structure can be revealed by X-ray microanalyses. The composition of katoite is variable due to the various extent of substitution of 4OH− by SiO44− due to silica fume.

Citovat

BOHÁČ, Martin; Anežka ZEZULOVÁ; Michaela KREJČÍ KOTLÁNOVÁ; Dana KUBÁTOVÁ; Theodor STANĚK; Zdeněk KREJZA; Dalibor VŠIANSKÝ; Radek NOVOTNÝ; Jakub PALOVČÍK a Karel DVOŘÁK. Early hydration of C4AF with silica fume and its role on katoite composition. Journal of Microscopy. Wiley, 2024, roč. 294, č. 2, s. 168-176. ISSN 0022-2720. Dostupné z: https://doi.org/10.1111/jmi.13280.

@article{2471899,
   author = {Boháč, Martin and Zezulová, Anežka and Krejčí Kotlánová, Michaela and Kubátová, Dana and Staněk, Theodor and Krejza, Zdeněk and Všianský, Dalibor and Novotný, Radek and Palovčík, Jakub and Dvořák, Karel},
   article_number = {2},
   doi = {https://doi.org/10.1111/jmi.13280},
   keywords = {C(4)AF; hydration; katoite; microstructure; silica fume},
   language = {eng},
   issn = {0022-2720},
   journal = {Journal of Microscopy},
   title = {Early hydration of C4AF with silica fume and its role on katoite composition},
   url = {https://onlinelibrary.wiley.com/doi/10.1111/jmi.13280},
   volume = {294},
   year = {2024}
}

TY  - JOUR
ID  - 2471899
AU  - Boháč, Martin - Zezulová, Anežka - Krejčí Kotlánová, Michaela - Kubátová, Dana - Staněk, Theodor - Krejza, Zdeněk - Všianský, Dalibor - Novotný, Radek - Palovčík, Jakub - Dvořák, Karel
PY  - 2024
TI  - Early hydration of C4AF with silica fume and its role on katoite composition
JF  - Journal of Microscopy
VL  - 294
IS  - 2
SP  - 168-176
EP  - 168-176
PB  - Wiley
SN  - 00222720
KW  - C(4)AF
KW  - hydration
KW  - katoite
KW  - microstructure
KW  - silica fume
UR  - https://onlinelibrary.wiley.com/doi/10.1111/jmi.13280
N2  - 4AF is considered the least reactive main clinker phase, but its reactivity may be affected by adding supplementary cementitious materials (SCMs). Pure C4AF was synthesised in a laboratory furnace, and the role of silica fume without gypsum on its early hydration properties was monitored. Burning was carried out in four stages to achieve 99% purity of C4AF. Heat flow development was monitored by isothermal calorimetry over 7 days of hydration at 20°C and 40°C. The role of silica fume on hydrogarnet phase katoite (Ca3Al2(SiO4)3 – x(OH)4x x = 1.5–3) formation during early hydration was studied. Rapid dissolution of C4AF, formation of metastable C-(A,F)-H and its conversion to C3(A, F)H6 was evidenced by isothermal calorimetry as a large exotherm. Changes in microstructure during early hydration were documented by SE micrographs, EDS point analyses, X-ray mapping and line scans by SEM-EDS. The phase composition was characterised by DTA-TGA and QXRD after 7 days of hydration. The katoite diffraction pattern is similar for the reference sample and sample with silica fume, but substitution in its structure can be revealed by X-ray microanalyses. The composition of katoite is variable due to the various extent of substitution of 4OH− by SiO44− due to silica fume.
ER  -

BOHÁČ, Martin; Anežka ZEZULOVÁ; Michaela KREJČÍ KOTLÁNOVÁ; Dana KUBÁTOVÁ; Theodor STANĚK; Zdeněk KREJZA; Dalibor VŠIANSKÝ; Radek NOVOTNÝ; Jakub PALOVČÍK a Karel DVOŘÁK. Early hydration of C4AF with silica fume and its role on katoite composition. \textit{Journal of Microscopy}. Wiley, 2024, roč.~294, č.~2, s.~168-176. ISSN~0022-2720. Dostupné z: https://doi.org/10.1111/jmi.13280.

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