Environmental sensitivity of the topological model for aluminosilicate glass dissolution

Tandre Oey, Erika Callagon, Kai Yang, Mathieu Bauchy, Jeffrey Bullard, Gaurav Sant

Research output: Contribution to journalArticleScientificpeer-review

Abstract

Fly ash, largely composed of aluminosilicate glass, represents a low-carbon alternative for replacing cement as the binder fraction in concrete. It is thus essential to better understand fly ash reactivity under relevant environmental conditions (i.e., varied solution pH, temperature). Inductively coupled plasma optical emission spectroscopy (ICP-OES) is applied herein to establish the aqueous dissolution rate of pure synthetic glasses tailored to imitate the Ca and Al content of a suite of previously studied fly ashes. Though dissolution rate under a limited set of pH and temperature conditions remains dependent upon the average number of topological constraints per atom within the aluminosilicate glass network, this dependence is not consistent for elevated pH and/or temperature environments. This may be due either to time-dependent changes in topological constraints, or to a change in the dissolution mechanism upon which the topological model is predicated (i.e., network hydrolysis). Results highlight the need for additional considerations to be made in the application of such topological controls to describing glass reactivity under more varied environmental conditions. The structure-property relationships reported herein establish an improved framework to estimate and control interactions between amorphous materials, including fly ash, and the expected environmental conditions under which they will be reacted.
Original languageEnglish
JournalJournal of the American Ceramic Society
Publication statusIn preparation - Sep 2019
MoE publication typeA1 Journal article-refereed

Fingerprint

Coal Ash
Aluminosilicates
Fly ash
Dissolution
Glass
Optical emission spectroscopy
Inductively coupled plasma
Temperature
Binders
Hydrolysis
Cements
Carbon
Concretes
Atoms
aluminosilicate

Cite this

Oey, T., Callagon, E., Yang, K., Bauchy, M., Bullard, J., & Sant, G. (2019). Environmental sensitivity of the topological model for aluminosilicate glass dissolution. Manuscript in preparation.
Oey, Tandre ; Callagon, Erika ; Yang, Kai ; Bauchy, Mathieu ; Bullard, Jeffrey ; Sant, Gaurav. / Environmental sensitivity of the topological model for aluminosilicate glass dissolution. In: Journal of the American Ceramic Society. 2019.
@article{3f570dc75fe74c71881ec366fb7ad9a4,
title = "Environmental sensitivity of the topological model for aluminosilicate glass dissolution",
abstract = "Fly ash, largely composed of aluminosilicate glass, represents a low-carbon alternative for replacing cement as the binder fraction in concrete. It is thus essential to better understand fly ash reactivity under relevant environmental conditions (i.e., varied solution pH, temperature). Inductively coupled plasma optical emission spectroscopy (ICP-OES) is applied herein to establish the aqueous dissolution rate of pure synthetic glasses tailored to imitate the Ca and Al content of a suite of previously studied fly ashes. Though dissolution rate under a limited set of pH and temperature conditions remains dependent upon the average number of topological constraints per atom within the aluminosilicate glass network, this dependence is not consistent for elevated pH and/or temperature environments. This may be due either to time-dependent changes in topological constraints, or to a change in the dissolution mechanism upon which the topological model is predicated (i.e., network hydrolysis). Results highlight the need for additional considerations to be made in the application of such topological controls to describing glass reactivity under more varied environmental conditions. The structure-property relationships reported herein establish an improved framework to estimate and control interactions between amorphous materials, including fly ash, and the expected environmental conditions under which they will be reacted.",
author = "Tandre Oey and Erika Callagon and Kai Yang and Mathieu Bauchy and Jeffrey Bullard and Gaurav Sant",
year = "2019",
month = "9",
language = "English",
journal = "Journal of the American Ceramic Society",
issn = "0002-7820",
publisher = "Wiley-Blackwell",

}

Environmental sensitivity of the topological model for aluminosilicate glass dissolution. / Oey, Tandre; Callagon, Erika; Yang, Kai; Bauchy, Mathieu; Bullard, Jeffrey; Sant, Gaurav.

In: Journal of the American Ceramic Society, 09.2019.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Environmental sensitivity of the topological model for aluminosilicate glass dissolution

AU - Oey, Tandre

AU - Callagon, Erika

AU - Yang, Kai

AU - Bauchy, Mathieu

AU - Bullard, Jeffrey

AU - Sant, Gaurav

PY - 2019/9

Y1 - 2019/9

N2 - Fly ash, largely composed of aluminosilicate glass, represents a low-carbon alternative for replacing cement as the binder fraction in concrete. It is thus essential to better understand fly ash reactivity under relevant environmental conditions (i.e., varied solution pH, temperature). Inductively coupled plasma optical emission spectroscopy (ICP-OES) is applied herein to establish the aqueous dissolution rate of pure synthetic glasses tailored to imitate the Ca and Al content of a suite of previously studied fly ashes. Though dissolution rate under a limited set of pH and temperature conditions remains dependent upon the average number of topological constraints per atom within the aluminosilicate glass network, this dependence is not consistent for elevated pH and/or temperature environments. This may be due either to time-dependent changes in topological constraints, or to a change in the dissolution mechanism upon which the topological model is predicated (i.e., network hydrolysis). Results highlight the need for additional considerations to be made in the application of such topological controls to describing glass reactivity under more varied environmental conditions. The structure-property relationships reported herein establish an improved framework to estimate and control interactions between amorphous materials, including fly ash, and the expected environmental conditions under which they will be reacted.

AB - Fly ash, largely composed of aluminosilicate glass, represents a low-carbon alternative for replacing cement as the binder fraction in concrete. It is thus essential to better understand fly ash reactivity under relevant environmental conditions (i.e., varied solution pH, temperature). Inductively coupled plasma optical emission spectroscopy (ICP-OES) is applied herein to establish the aqueous dissolution rate of pure synthetic glasses tailored to imitate the Ca and Al content of a suite of previously studied fly ashes. Though dissolution rate under a limited set of pH and temperature conditions remains dependent upon the average number of topological constraints per atom within the aluminosilicate glass network, this dependence is not consistent for elevated pH and/or temperature environments. This may be due either to time-dependent changes in topological constraints, or to a change in the dissolution mechanism upon which the topological model is predicated (i.e., network hydrolysis). Results highlight the need for additional considerations to be made in the application of such topological controls to describing glass reactivity under more varied environmental conditions. The structure-property relationships reported herein establish an improved framework to estimate and control interactions between amorphous materials, including fly ash, and the expected environmental conditions under which they will be reacted.

M3 - Article

JO - Journal of the American Ceramic Society

JF - Journal of the American Ceramic Society

SN - 0002-7820

ER -