ON COMPRESSIVE STRENGTH VARIATION IN CONCRETE

THE INTERRELATIONSHIP OF THE STANDARD DEVIATION, THE COEFFICIENT OF VARIATION, AND THE COMPRESSIVE STRENGTH OF CONCRETE WAS STUDIED ON 32 BUILDING SITES AND 14 READY-MIX PLANTS, WITH MORE THAN 30,000 OBSERVATIONS ANALYZED. WHILE THE STANDARD DEVIATION WAS FOUND TO BE PARACTICALLY STRENGTH-INDEPENDENT WHEN OVERALL VALUES WERE CONSIDERED, THE COEFFICIENT OF VARIATION SHOWED SUCH INDEPENDENCE IN ITS DAILY VALUES. IT WAS FURTHER CONCLUDED THAT FORMAL COMPLIANCE WITH A SET OF NOMINAL REQUIREMENTS DOES NOT NECESSARILY SECURE THE EXPECTED STRENGTH VARIATION, IN WHICH RESPECT THE ACTUAL LEVEL OF SUPERVISION IS THE DOMINANT FACTOR. THE AVERAAGE OVERALL STANDARD DEVIATION WAS OF THE ORDER OF 60 KG. PER SQ. CM. AND THE DAILY COEFFICIENT OF VARIATION WAS OF THE ORDER OF 10%, IRRESPECTIVE OF NOMINAL CONDITIONS OF CONCRETE PRODUCTION. /AUTHOR/

• Supplemental Notes:
  • Vol 4, No 21, PP 155-161
• Authors:
  • Soroka, I
• Publication Date: 1971-5

Media Info

• Serial:
  • Matls & Structures, Res & Testing /Fr/

Subject/Index Terms

• TRT Terms: Compression tests; Concrete plants; Concrete tests; Standard deviation; Supervision; Variables
• Old TRIS Terms: Compressive strength tests; Variations
• Subject Areas: Highways; Materials;

Filing Info

• Accession Number: 00213992
• Record Type: Publication
• Files: TRIS
• Created Date: Aug 15 1971 12:00AM