Standard

Inorganic Polymers From CaO-FeOx-SiO2 Slag: The Start of Oxidation of Fe and the Formation of a Mixed Valence Binder. / Peys, Arne; Douvalis, Alexios P.; Hallet, Vincent; Rahier, Hubert; Blanpain, Bart; Pontikes, Yiannis.

In: Frontiers in Materials, Vol. 6, 28.08.2019.

Research output: Contribution to journalArticle

Harvard

APA

Vancouver

Author

Peys, Arne ; Douvalis, Alexios P. ; Hallet, Vincent ; Rahier, Hubert ; Blanpain, Bart ; Pontikes, Yiannis. / Inorganic Polymers From CaO-FeOx-SiO2 Slag: The Start of Oxidation of Fe and the Formation of a Mixed Valence Binder. In: Frontiers in Materials. 2019 ; Vol. 6.

BibTeX

@article{4efff913056549c691e78c4706588af2,
title = "Inorganic Polymers From CaO-FeOx-SiO2 Slag: The Start of Oxidation of Fe and the Formation of a Mixed Valence Binder",
abstract = "Belonging to the family of alternative cementitious materials, inorganic polymers are rising in importance because of the drive to decrease CO 2 emissions of concrete production. A synthetic Fe-rich slag resembling industrial copper or lead slags, was mixed with a sodium silicate activating solution. 57Fe M{\"o}ssbauer spectra analyses indicate that the oxidation reactions are taking place simultaneously with the polymerization reactions. The slag contains Fe 2+ states and a small amount of Fe 3+. During polymerization a new octahedral Fe 2+ state is formed, while oxidation is manifested through the appearance of an additional Fe 3+ state. The reactions continue after setting, lowering the relative contributions of the slag in the M{\"o}ssbauer and FTIR spectra of the samples. The Na +/Fe 3+ molar ratio in the mixture that makes up the binder after 28 days is ~1, suggesting the participation of tetrahedral Fe 3+ in the silicate framework, charge balanced by Na +.",
keywords = "alkali activated materials, geopolymers, Fe-57 Mossbauer spectroscopy, non-ferrous slag, ex-situ kinetics, FTIR spectroscopy",
author = "Arne Peys and Douvalis, {Alexios P.} and Vincent Hallet and Hubert Rahier and Bart Blanpain and Yiannis Pontikes",
year = "2019",
month = "8",
day = "28",
doi = "10.3389/fmats.2019.00212",
language = "English",
volume = "6",
journal = "Frontiers in Materials",
issn = "2296-8016",
publisher = "Frontiers Media",

}

RIS

TY - JOUR

T1 - Inorganic Polymers From CaO-FeOx-SiO2 Slag: The Start of Oxidation of Fe and the Formation of a Mixed Valence Binder

AU - Peys, Arne

AU - Douvalis, Alexios P.

AU - Hallet, Vincent

AU - Rahier, Hubert

AU - Blanpain, Bart

AU - Pontikes, Yiannis

PY - 2019/8/28

Y1 - 2019/8/28

N2 - Belonging to the family of alternative cementitious materials, inorganic polymers are rising in importance because of the drive to decrease CO 2 emissions of concrete production. A synthetic Fe-rich slag resembling industrial copper or lead slags, was mixed with a sodium silicate activating solution. 57Fe Mössbauer spectra analyses indicate that the oxidation reactions are taking place simultaneously with the polymerization reactions. The slag contains Fe 2+ states and a small amount of Fe 3+. During polymerization a new octahedral Fe 2+ state is formed, while oxidation is manifested through the appearance of an additional Fe 3+ state. The reactions continue after setting, lowering the relative contributions of the slag in the Mössbauer and FTIR spectra of the samples. The Na +/Fe 3+ molar ratio in the mixture that makes up the binder after 28 days is ~1, suggesting the participation of tetrahedral Fe 3+ in the silicate framework, charge balanced by Na +.

AB - Belonging to the family of alternative cementitious materials, inorganic polymers are rising in importance because of the drive to decrease CO 2 emissions of concrete production. A synthetic Fe-rich slag resembling industrial copper or lead slags, was mixed with a sodium silicate activating solution. 57Fe Mössbauer spectra analyses indicate that the oxidation reactions are taking place simultaneously with the polymerization reactions. The slag contains Fe 2+ states and a small amount of Fe 3+. During polymerization a new octahedral Fe 2+ state is formed, while oxidation is manifested through the appearance of an additional Fe 3+ state. The reactions continue after setting, lowering the relative contributions of the slag in the Mössbauer and FTIR spectra of the samples. The Na +/Fe 3+ molar ratio in the mixture that makes up the binder after 28 days is ~1, suggesting the participation of tetrahedral Fe 3+ in the silicate framework, charge balanced by Na +.

KW - alkali activated materials

KW - geopolymers

KW - Fe-57 Mossbauer spectroscopy

KW - non-ferrous slag

KW - ex-situ kinetics

KW - FTIR spectroscopy

U2 - 10.3389/fmats.2019.00212

DO - 10.3389/fmats.2019.00212

M3 - Article

VL - 6

JO - Frontiers in Materials

JF - Frontiers in Materials

SN - 2296-8016

ER -

ID: 48016414