EFFECT OF STRESS LEVEL ON CREEP AND CREEP RECOVERY OF LEAN MASS CONCRETE

A TEST PROGRAM WAS CONDUCTED TO INVESTIGATE THE RELATIONSHIP BETWEEN THE INTENSITY OF SUSTAINED LOAD AND THE CREEP OF A TYPICAL MASS CONCRETE LOW CONTENT SIMILAR TO THAT USED IN CONCRETE DAMS. SEALED MASS CONCRETE CYLINDERS WERE LOADED IN COMPRESSION AT AGES OF 28 AND 90 DAYS; THE LOADS WERE SUSTAINED FOR OVER A YEAR AND CREEP WAS MEASURED PERIODICALLY. CREEP OF CONCRETE LOADED AT 28 DAYS IS PROPORTIONAL TO SUSTAINED STRESS LESS THAN 15% OF THE 28-DAY COMPRESSIVE STRENGTH. INCREASES IN CREEP DEFORMATIONS ARE NOTED AT STRESSES GREATER THAN 15%. CONCRETE LOADED AT 90 DAYS EXHIBITS CREEP PROPORTIONAL TO SUSTAINED STRESS TO 22% OF THE 90-DAY COMPRESSIVE STRENGTH. CREEP RECOVERIES OF SEALED CONCRETE SPECIMENS UNLOADED AFTER 400 DAYS OF CONTINUOUS COMPRESSION ARE PROPORTIONAL TO SUSTAINED STRESS, REGARDLESS OF THE CONCRETE AGE AT LOAD APPLICATION. /AUTHOR/

  • Supplemental Notes:
    • 11 Pp, 2 FiG, 2 TAB, 12 REF
  • Corporate Authors:

    Bureau of Reclamation /US

    ,    
  • Authors:
    • Hickery, K B
  • Publication Date: 1969-12

Subject/Index Terms

Filing Info

  • Accession Number: 00213684
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Aug 3 1970 12:00AM