USE OF SWISS HAMMER FOR ESTIMATING COMPRESSIVE STRENGTH OF HARDENED CONCRETE
A SIMPLE AND PORTABLE INSTRUMENT FOR USE IN ESTIMATING THE COMPRESSIVE STRENGTH OF HARDENED CONCRETE IN PLACE HAS BEEN DEVELOPED RECENTLY BY A SWISS ENGINEER. THE DEVICE, POPULARLY KNOWN AS THE SWISS HAMMER, IS DESIGNED FOR FIELD USE AND IS NOT INTENDED AS A SUBSTITUTE FOR CONTROL TESTING. IT IS BEING USED IN THE FIELD TO GAGE INCREASES IN CONCRETE STRENGTH WITH AGE AND IN LOCATING LOW STRENGTH AREAS WHEN LABORATORY TESTS OF CONTROL CONCRETE CYLINDERS OR OTHER CONDITIONS INDICATE THAT SUCH AREAS MIGHT EXIST. IT IS ALSO USEFUL IN SURVEYS OF OLD STRUCTURES. THE TEST RESULTS GIVEN IN THIS REPORT SHOW THAT FACTORS SUCH AS SURFACE SMOOTHNESS, SURFACE MOISTURE CONDITION, AND TYPE OF COARSE AGGREGATE AFFECT THE STRENGTH VALUES OBTAINED BY THE USE OF THE DEVICE. /AUTHOR/
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Supplemental Notes:
- No 201, Pp1-14, 9 FIG, 6 TAB, 7 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:
- Grieb, William E
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Discussers:
- Philleo, Robert E
- Publication Date: 1958
Media Info
- Media Type: Digital/other
- Pagination: 14p
- Monograph Title: Rapid tests for aggregate and concrete
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Serial:
- Highway Research Board Bulletin
- Issue Number: 201
- Publisher: Highway Research Board
Subject/Index Terms
- TRT Terms: Age; Coarse aggregates; Compressive strength; Concrete hardening; Hammers; Instrumentation; Moisture content; Smoothness; Surfaces
- Uncontrolled Terms: Hardened concrete; Swiss hammer
- Old TRIS Terms: Test results
- Subject Areas: Highways; Materials;
Filing Info
- Accession Number: 00213214
- Record Type: Publication
- Files: TRIS, TRB
- Created Date: Aug 19 1994 12:00AM