CREEP OF CONCRETE WITH VARYING PROPORTIONS OF UNHYDRATED CEMENT

TO EVALUATE THE RESTRAINING INFLUENCE OF UNHYDRATED CEMENT ON CREEP, TESTS WERE MADE ON CONCRETE WITH CLINKER AGGREGATE OF THE SAME COMPOSITION AS THE CEMENT, STORED IN A DESICCATED ATMOSPHERE. THE CREEP BEHAVIOR APPROXIMATES THAT OF A COMBINED SOFT MATERIAL IN THAT THE MODULUS OF ELASTICITY BASED ON THE TOTAL DEFORMATION AFTER A TIME UNDER LOAD VARIES IN ACCORDANCE WITH THE COMBINED SOFT MODEL FOR DEFORMATION OF A TWO-PHASE MATERIAL. THE DEPARTURE FROM THE MODEL GROWS WITH AN INCREASE IN CLINKER CONTENT IN THE MIX. A RELATION BETWEEN CREEP AND WATER-CEMENT RATIO AND THE DEGREE OF HYDRATION IS PROPOSED, THE STATE OF THE CEMENT PASTE BEING DESCRIBED IN TERMS OF THE TOTAL WATER AND THE NONEVAPORABLE WATER. IT IS, HOWEVER, NOT KNOWN WHICH PROPERTIES OF THE HYDRATED CEMENT PASTE ARE HIGHLY SIGNIFICANT. THE RATIO OF CREEP RECOVERY TO CREEP WAS FOUND TO BE HIGHER AT A WATER-CEMENT RATIO OF 0.43 THAN AT 0.35 BUT DID NOT VARY IN A REGULAR MANNER WITH THE FRACTINAL VOLUME OF UNHYDRATED CEMENT AND CLINKER. REJUVENATION OF RECOVERY BY WETTING WAS CONFIRMED. /AUTHOR/

Media Info

  • Media Type: Print
  • Features: Figures; References; Tables;
  • Pagination: pp 90-98
  • Monograph Title: Portland cement concrete - sealers, durability creep, reactivity, and cement determination
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00213388
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Sep 22 1994 12:00AM