Changes in the chemical composition of silica fume in the
concrete composite system

J 2023

Changes in the chemical composition of silica fume in the concrete composite system

FRÝBORT, Aleš; Jana ŠTULÍŘOVÁ; Jiří GROŠEK a Miroslava GREGEROVÁ

Základní údaje

Originální název

Changes in the chemical composition of silica fume in the concrete composite system

Autoři

FRÝBORT, Aleš (garant); Jana ŠTULÍŘOVÁ; Jiří GROŠEK a Miroslava GREGEROVÁ (203 Česká republika, domácí)

Vydání

Case Studies in Construction Materials, Elsevier, 2023, 2214-5095

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

10500 1.5. Earth and related environmental sciences

Stát vydavatele

Nizozemské království

Utajení

není předmětem státního či obchodního tajemství

Odkazy

URL

Impakt faktor

Impact factor: 6.500

Kód RIV

RIV/00216224:14310/23:00131686

Organizační jednotka

Přírodovědecká fakulta

DOI

https://doi.org/10.1016/j.cscm.2023.e01916

UT WoS

000946593800001

EID Scopus

2-s2.0-85147852009

Klíčová slova anglicky

Silica fume; SEM; EDX; ASR; Concrete

Štítky

rivok

Příznaky

Mezinárodní význam, Recenzováno

Změněno: 13. 9. 2023 09:54, Mgr. Marie Novosadová Šípková, DiS.

Anotace

V originále

The paper demonstrates a spontaneous change in the micro-chemical composition of silica fume micropellets in a composite system of concretes with pozzolans admixtures. For 18 years, concrete was modified in laboratory conditions only with the use of drinking water. Using quantitative techniques of scanning electron microscopy (SEM) and microanalysis (EDX), the paper presents results of a hydration analysis of concrete prepared according to three different recipes from Portland cement mixed with silica fume and slag. Hydration and changes in the chemical composition of the silica fume micropellets were evaluated over a time-frame of 0, 5, 15, 18 years. The paper describes "spontaneous pure hydration", during which compaction and change of the micro-chemical composition, density and chemical composition occur in two different morphology types of silica fume micropellets. The experiment confirmed the preventive effect of silica fume micropellets on the course of expansion reactions in concrete structures. Even after 18 years, no expansive alkaline silica gels were identified in the concrete. Silica fume has a positive effect on the speed of the expanding alkali-silica reaction, which, even at very low content (2 %), it slows down.

Citovat

FRÝBORT, Aleš; Jana ŠTULÍŘOVÁ; Jiří GROŠEK a Miroslava GREGEROVÁ. Changes in the chemical composition of silica fume in the concrete composite system. Case Studies in Construction Materials. Elsevier, 2023, roč. 18, July, s. 1-21. ISSN 2214-5095. Dostupné z: https://doi.org/10.1016/j.cscm.2023.e01916.

@article{2310457,
   author = {Frýbort, Aleš and Štulířová, Jana and Grošek, Jiří and Gregerová, Miroslava},
   article_number = {July},
   doi = {https://doi.org/10.1016/j.cscm.2023.e01916},
   keywords = {Silica fume; SEM; EDX; ASR; Concrete},
   language = {eng},
   issn = {2214-5095},
   journal = {Case Studies in Construction Materials},
   title = {Changes in the chemical composition of silica fume in the concrete composite system},
   url = {https://doi.org/10.1016/j.cscm.2023.e01916},
   volume = {18},
   year = {2023}
}

TY  - JOUR
ID  - 2310457
AU  - Frýbort, Aleš - Štulířová, Jana - Grošek, Jiří - Gregerová, Miroslava
PY  - 2023
TI  - Changes in the chemical composition of silica fume in the concrete composite system
JF  - Case Studies in Construction Materials
VL  - 18
IS  - July
SP  - 1-21
EP  - 1-21
PB  - Elsevier
SN  - 22145095
KW  - Silica fume
KW  - SEM
KW  - EDX
KW  - ASR
KW  - Concrete
UR  - https://doi.org/10.1016/j.cscm.2023.e01916
N2  - The paper demonstrates a spontaneous change in the micro-chemical composition of silica fume micropellets in a composite system of concretes with pozzolans admixtures. For 18 years, concrete was modified in laboratory conditions only with the use of drinking water. Using quantitative techniques of scanning electron microscopy (SEM) and microanalysis (EDX), the paper presents results of a hydration analysis of concrete prepared according to three different recipes from Portland cement mixed with silica fume and slag. Hydration and changes in the chemical composition of the silica fume micropellets were evaluated over a time-frame of 0, 5, 15, 18 years. The paper describes "spontaneous pure hydration", during which compaction and change of the micro-chemical composition, density and chemical composition occur in two different morphology types of silica fume micropellets. The experiment confirmed the preventive effect of silica fume micropellets on the course of expansion reactions in concrete structures. Even after 18 years, no expansive alkaline silica gels were identified in the concrete. Silica fume has a positive effect on the speed of the expanding alkali-silica reaction, which, even at very low content (2 %), it slows down.
ER  -

FRÝBORT, Aleš; Jana ŠTULÍŘOVÁ; Jiří GROŠEK a Miroslava GREGEROVÁ. Changes in the chemical composition of silica fume in the concrete composite system. \textit{Case Studies in Construction Materials}. Elsevier, 2023, roč.~18, July, s.~1-21. ISSN~2214-5095. Dostupné z: https://doi.org/10.1016/j.cscm.2023.e01916.

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