TIME-DEPENDENT DEFORMATIONS OF PLAIN CONCRETE
CYLINDRICAL CONCRETE SPECIMENS IN SIZES 3 IN. BY 9 IN., 4 IN. BY 12 IN., AND 6 IN. BY 18 IN. HAVE BEEN SUBJECTED TO CONSTANT SUSTAINED COMPRESSIVE STRESSES OF 2,000 AND 3,000 PSI, REPRESENTING 38 AND 57 PERCENT, RESPECTIVELY, OF THE ULTIMATE COMPRESSIVE STRENGTH AT TIME OF LOADING. SPECIMENS WERE PLACED IN CONTROLLED ENVIRONMENTS OF 20, 50 AND 100 PERCENT RELATIVE HUMIDITY. CONCRETE DEFORMATION MEASUREMENTS WERE MADE IN THE CENTRAL PORTIONS OF THE SPECIMENS WITH MECHANICAL STRAIN GAGES AND END-TO-END WITH ELECTRONIC CANTILEVER DEFLECTION REEDS. SHRINKAGE MEASUREMENTS WERE MADE ON UNLOADED COMPANION SPECIMENS. TEST RESULTS ARE REPORTED FOR 175 DAYS OF LOADING. CREEP STRAIN DID NOT APPEAR TO BE GREATLY INFLUENCED BY SIZE IN THE RANGE OF SIZES USED. CREEP WAS 5 TO 10 PERCENT GREATER IN 20 PERCENT THAN IN 50 PERCENT RELATIVE HUMIDITY. /AUTHOR/
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Supplemental Notes:
- Vol 39, pp 310-335, 28 FIG, 9 TAB, 3 PHOT. 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:
- Keeton, J R
- Publication Date: 1960
Media Info
- Media Type: Digital/other
- Monograph Title: Proceedings of the Thirty-Ninth Annual Meeting of the Highway Research Board, Washington, D.C., January 11-15, 1960
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Serial:
- Highway Research Board Proceedings
- Volume: 39
- Publisher: Highway Research Board
Subject/Index Terms
- TRT Terms: Compressive strength; Concrete; Deformation; Humidity; Loads; Measurement; Shrinkage; Strain gages; Stresses
- Uncontrolled Terms: Loading
- Subject Areas: Highways; Materials;
Filing Info
- Accession Number: 00213983
- Record Type: Publication
- Files: TRIS, TRB
- Created Date: Aug 29 1971 12:00AM