THE COMBINED USE OF FLY ASH AND LITHIUM NITRATE FOR CONTROLLING EXPANSION DUE TO ALKALI-SILICA REACTION
This paper presents preliminary data from a comprehensive research program investigating the efficacy of combinations of fly ash and lithium compounds for preventing damaging expansion due to alkali-silica reaction in concrete. The data presented include results from mortar bar expansion tests using two highly reactive aggregates from New Mexico and Pyrex glass (i.e. ASTM C 227 and C 441), and from a modified version of the accelerated mortar bar test (ASTM C 1260). Cements were blended to give a range of alkali levels and fly ashes from six different sources were selected to provide a range of chemical compositions. Lithium was added to mortars in the form of a 30% lithium nitrate solution. The data indicate that the beneficial effects of lithium and fly ash are cumulative when the materials are combined and, in some cases, there is a synergistic effect.
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Supplemental Notes:
- Full conference proceedings available on CD-ROM.
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Corporate Authors:
University of Texas, Austin
International Center for Aggregates Research, 3208 Red River
Austin, TX United States 78705-2650Texas A&M University, College Station
Faculty Exchange Box H
College Station, TX United States 77843 -
Authors:
- Thomas, M
- Baxter, S
- Stokes, D
- Hill, R
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Conference:
- International Center for Aggregates Research 9th Annual Symposium: Aggregates - Concrete, Bases and Fines
- Location: Austin, Texas
- Date: 2001-4-22 to 2001-4-25
- Publication Date: 2001
Language
- English
Media Info
- Features: Figures; References; Tables;
- Pagination: 15p
Subject/Index Terms
- TRT Terms: Alkali silica reactions; Concrete; Expansion; Fly ash; Lithium; Nitrates; Reactive aggregates
- Subject Areas: Geotechnology; Highways; I36: Aggregates;
Filing Info
- Accession Number: 00983581
- Record Type: Publication
- Report/Paper Numbers: Final Draft
- Files: TRIS
- Created Date: Dec 27 2004 12:00AM