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Title: The effects of lithium hydroxide solution on alkali silica reaction gels created with opal

Abstract

The reaction of Nevada opal with calcium hydroxide, potassium hydroxide and lithium hydroxide solutions was investigated. In addition, opal was exposed to a combined solution of these three hydroxides. The progress of the three reactions was followed using X-ray diffraction (XRD), {sup 29}Si nuclear magnetic resonance (NMR) and scanning electron microscopy (SEM). The XRD results indicated the presence of a low-angle peak exclusive to the lithium-based reactions. The NMR results suggested a change in the silicate structure in the presence of lithium. These techniques indicated that the reaction of the alkali with the opal starting material is inhibited and perhaps stopped in the presence of lithium hydroxide. SEM revealed that the morphology of the reaction products on the surface of the reacted opal grains is markedly different invariably. It was concluded that evidence to support the theory of a protective layer exists and that the nature of the layer varies with ion type.

Authors:
; ;
Publication Date:
OSTI Identifier:
20658348
Resource Type:
Journal Article
Journal Name:
Cement and Concrete Research
Additional Journal Information:
Journal Volume: 34; Journal Issue: 4; Other Information: DOI: 10.1016/j.cemconres.2003.10.011; PII: S0008884603003685; Copyright (c) 2004 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0008-8846
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CALCIUM HYDROXIDES; GELS; LAYERS; LITHIUM HYDROXIDES; NUCLEAR MAGNETIC RESONANCE; OPALS; POTASSIUM HYDROXIDES; SCANNING ELECTRON MICROSCOPY; SILICATES; SILICON 29; SOLUTIONS; X-RAY DIFFRACTION

Citation Formats

Mitchell, Lyndon D, Beaudoin, James J, and Grattan-Bellew, Patrick. The effects of lithium hydroxide solution on alkali silica reaction gels created with opal. United States: N. p., 2004. Web. doi:10.1016/j.cemconres.2003.10.011.
Mitchell, Lyndon D, Beaudoin, James J, & Grattan-Bellew, Patrick. The effects of lithium hydroxide solution on alkali silica reaction gels created with opal. United States. https://doi.org/10.1016/j.cemconres.2003.10.011
Mitchell, Lyndon D, Beaudoin, James J, and Grattan-Bellew, Patrick. 2004. "The effects of lithium hydroxide solution on alkali silica reaction gels created with opal". United States. https://doi.org/10.1016/j.cemconres.2003.10.011.
@article{osti_20658348,
title = {The effects of lithium hydroxide solution on alkali silica reaction gels created with opal},
author = {Mitchell, Lyndon D and Beaudoin, James J and Grattan-Bellew, Patrick},
abstractNote = {The reaction of Nevada opal with calcium hydroxide, potassium hydroxide and lithium hydroxide solutions was investigated. In addition, opal was exposed to a combined solution of these three hydroxides. The progress of the three reactions was followed using X-ray diffraction (XRD), {sup 29}Si nuclear magnetic resonance (NMR) and scanning electron microscopy (SEM). The XRD results indicated the presence of a low-angle peak exclusive to the lithium-based reactions. The NMR results suggested a change in the silicate structure in the presence of lithium. These techniques indicated that the reaction of the alkali with the opal starting material is inhibited and perhaps stopped in the presence of lithium hydroxide. SEM revealed that the morphology of the reaction products on the surface of the reacted opal grains is markedly different invariably. It was concluded that evidence to support the theory of a protective layer exists and that the nature of the layer varies with ion type.},
doi = {10.1016/j.cemconres.2003.10.011},
url = {https://www.osti.gov/biblio/20658348}, journal = {Cement and Concrete Research},
issn = {0008-8846},
number = 4,
volume = 34,
place = {United States},
year = {Thu Apr 01 00:00:00 EST 2004},
month = {Thu Apr 01 00:00:00 EST 2004}
}