LABORATORY INVESTIGATION OF LITHIUM-BEARING COMPOUNDS FOR USE IN CONCRETE
Lithium nitrate and lithium hydroxide were evaluated in the laboratory to examine their effectiveness in controlling expansions resulting from alkali-silica reaction (ASR) and their effect on concrete properties. The lithium compounds were more effective in highly accelerated tests using Pyrex as the aggregate than in concrete prism tests using a reactive Virginia aggregate. The effective dosage of lithium nitrate in the concrete prism test was higher than that typically recommended. Lithium nitrate had a benign effect on the concrete properties of strength, electrical resistance, drying shrinkage, and resistance to freezing and thawing. Similar results were obtained with lithium hydroxide, with the exception of a retarding effect on strength development. Additional research is needed to delineate an appropriate protocol for determining the dosage of lithium admixture needed for effective control of a given concrete mixture. Using current sources of fly ash and slag is more effective in addressing the Virginia Department of Transportation's problems with ASR than is using lithium admixtures.
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Corporate Authors:
Virginia Transportation Research Council
530 Edgemont Road
Charlottesville, VA United States 22903Virginia Department of Transportation
Office of Public Affairs, 1221 East Broad Street
Richmond, VA United States 23219 -
Authors:
- Lane, D S
- Publication Date: 2002-6
Language
- English
Media Info
- Features: Figures; References; Tables;
- Pagination: 22 p.
Subject/Index Terms
- TRT Terms: Alkali silica reactions; Concrete; Drying; Freeze thaw durability; Laboratory tests; Lithium compounds; Resistance (Electricity); Shrinkage; Strength of materials
- Uncontrolled Terms: Lithium hydroxide; Lithium nitrate
- Subject Areas: Highways; Materials; I32: Concrete;
Filing Info
- Accession Number: 00929174
- Record Type: Publication
- Report/Paper Numbers: VTRC 02-R16,, Final Report,, Project No. 0000021510
- Files: NTL, TRIS, ATRI, STATEDOT
- Created Date: Aug 12 2002 12:00AM