DELETERIOUS CONSTITUENTS OF INDIANA GRAVELS
RESULTS ARE REPORTED OF TESTS ON INDIANA GRAVELS RANGING FROM GOOD TO POOR IN FIELD PERFORMANCE IN PORTLAND-CEMENT CONCRETE. THE GRAVELS WERE SEPARATED BY LIQUID FLOTATION INTO VARIOUS SPECIFIC-GRAVITY RANGES. THE GRAVEL FRACTIONS THUS OBTAINED WERE TESTED TO DETERMINE THE ABSORPTION, SPECIFIC GRAVITY, DEGREE OF SATURATION, LITHOLOGIC COMPOSITION AND DURABILITYIN AIR-ENTRAINED CONCRETE SUBJECTED TO FREEZING AND THAWING. THE RESULTS SHOW THAT THE PRINCIPAL DELETERIOUS CONSTITUENTS OF INDIANA GRAVELS ARE SANDSTONES AND CHERTS. THEY ARE CHARACTERIZED BY LOW SPECIFIC GRAVITY, HIGH ABSORPTION AND DEGREE OF SATURATION, AND PRODUCE NONDURABLE CONCRETE WHEN USED AS THE COARSE AGGREGATE. THE CONCRETE DURABILITY CAN BE IMPROVED BY HEAVY-MEDIA SEPARATION OF THE AGGREGATE. GREATER DURABILITY IS OBTAINED AS THE SPECIFIC GRAVITY AT WHICH THE SEPARATION IS MADE IS INCREASED. /AUTHOR/
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Supplemental Notes:
- No 94, 10 PP, 5 FIG, 7 TAB, 11 REF Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved
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Authors:
- Lewis, D W
- Venters, Eduards
- Publication Date: 1954-1
Media Info
- Media Type: Print
- Pagination: 10p
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Serial:
- Highway Research Board Bulletin
- Issue Number: 94
- Publisher: Highway Research Board
Subject/Index Terms
- TRT Terms: Absorption; Air entrained concrete; Cherts; Coarse aggregates; Concrete; Deleterious materials; Durability; Freeze thaw durability; Gravel; Measurement; Percent saturation; Portland cement concrete; Sandstones; Specific gravity
- Old TRIS Terms: Specific gravity tests
- Subject Areas: Geotechnology; Highways;
Filing Info
- Accession Number: 00217778
- Record Type: Publication
- Files: TRIS, TRB, ATRI
- Created Date: Jul 28 1994 12:00AM