ASR prevention — Effect of aluminum and lithium ions on the reaction products
Abstract
In spite of the recent progress in the understanding of the mechanisms enabling aluminum-containing SCM like metakaolin and added LiNO{sub 3} to limit the extent of ASR in mortar and concrete, some gaps still remain. They concern mainly the effect of aluminum-containing SCM on the formed ASR products and the influence of aggregate characteristics on the effectiveness of LiNO{sub 3}. In this study, a model system, concrete and mortar were investigated by pore solution analysis, TGA, XRD, NMR, SEM combined with EDX and ToF-SIMS to address these questions. The amount of aluminum present in the pore solution of concrete and mortar is only able to slow down SiO{sub 2} dissolution but not to alter morphology, structure and composition of the reaction products. LiNO{sub 3} can suppress ASR by forming dense products protecting reactive minerals from further reaction. But its effectiveness is decreasing with increasing specific surface area of the reactive minerals in aggregates. - Highlights: • Aluminum of SCM slows down SiO{sub 2} dissolution. • Aluminum of SCM does not alter morphology and structure of ASR product. • ASR suppressing effect of LiNO{sub 3} depends on specific surface area of the aggregates.
- Authors:
-
- Laboratory for Concrete/Construction Chemistry, Empa, Swiss Federal Laboratories for Material Science and Technology, Überlandstr. 129, 8600 Dübendorf (Switzerland)
- Laboratory for Nanoscale Materials Science, Empa, Swiss Federal Laboratories for Material Science and Technology, Überlandstr. 129, 8600 Dübendorf (Switzerland)
- Publication Date:
- OSTI Identifier:
- 22475528
- Resource Type:
- Journal Article
- Journal Name:
- Cement and Concrete Research
- Additional Journal Information:
- Journal Volume: 76; Other Information: Copyright (c) 2015 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; ALUMINIUM; CONCRETES; DISSOLUTION; ION MICROPROBE ANALYSIS; LITHIUM IONS; LITHIUM NITRATES; MASS SPECTROSCOPY; MORPHOLOGY; MORTARS; NMR SPECTRA; NUCLEAR MAGNETIC RESONANCE; SCANNING ELECTRON MICROSCOPY; SILICA; SILICON OXIDES; SPECIFIC SURFACE AREA; THERMAL GRAVIMETRIC ANALYSIS; X-RAY DIFFRACTION; X-RAY SPECTROSCOPY
Citation Formats
Leemann, Andreas, Bernard, Laetitia, Alahrache, Salaheddine, and Winnefeld, Frank. ASR prevention — Effect of aluminum and lithium ions on the reaction products. United States: N. p., 2015.
Web. doi:10.1016/J.CEMCONRES.2015.06.002.
Leemann, Andreas, Bernard, Laetitia, Alahrache, Salaheddine, & Winnefeld, Frank. ASR prevention — Effect of aluminum and lithium ions on the reaction products. United States. https://doi.org/10.1016/J.CEMCONRES.2015.06.002
Leemann, Andreas, Bernard, Laetitia, Alahrache, Salaheddine, and Winnefeld, Frank. 2015.
"ASR prevention — Effect of aluminum and lithium ions on the reaction products". United States. https://doi.org/10.1016/J.CEMCONRES.2015.06.002.
@article{osti_22475528,
title = {ASR prevention — Effect of aluminum and lithium ions on the reaction products},
author = {Leemann, Andreas and Bernard, Laetitia and Alahrache, Salaheddine and Winnefeld, Frank},
abstractNote = {In spite of the recent progress in the understanding of the mechanisms enabling aluminum-containing SCM like metakaolin and added LiNO{sub 3} to limit the extent of ASR in mortar and concrete, some gaps still remain. They concern mainly the effect of aluminum-containing SCM on the formed ASR products and the influence of aggregate characteristics on the effectiveness of LiNO{sub 3}. In this study, a model system, concrete and mortar were investigated by pore solution analysis, TGA, XRD, NMR, SEM combined with EDX and ToF-SIMS to address these questions. The amount of aluminum present in the pore solution of concrete and mortar is only able to slow down SiO{sub 2} dissolution but not to alter morphology, structure and composition of the reaction products. LiNO{sub 3} can suppress ASR by forming dense products protecting reactive minerals from further reaction. But its effectiveness is decreasing with increasing specific surface area of the reactive minerals in aggregates. - Highlights: • Aluminum of SCM slows down SiO{sub 2} dissolution. • Aluminum of SCM does not alter morphology and structure of ASR product. • ASR suppressing effect of LiNO{sub 3} depends on specific surface area of the aggregates.},
doi = {10.1016/J.CEMCONRES.2015.06.002},
url = {https://www.osti.gov/biblio/22475528},
journal = {Cement and Concrete Research},
issn = {0008-8846},
number = ,
volume = 76,
place = {United States},
year = {Thu Oct 15 00:00:00 EDT 2015},
month = {Thu Oct 15 00:00:00 EDT 2015}
}