METHOD FOR PREDICTING PRESTRESS LOSSES IN A PRESTRESSED PORTLAND CEMENT PASTES AND MORTARS

A MODIFIED VANE-SHEAR APPARATUS WAS USED TO MEASURE THE SHEAR RESISTANCE OF NEAT CEMENT PASTES OF NORMAL CONSISTENCY AND 1:2.75 (CEMENT TO SAND) MORTARS OF STANDARD CONSISTENCY, AND TO MEASURE THE INCREASE IN SHEAR RESISTANCE WITH TIME AS THE CEMENTS HARDENED. THE HARDENING PROCESS APPEARED TO OCCUR IN THREE STAGES. THE RATE OF INCREASE OF SHEAR RESISTANCE AS WELL AS THE DURATION OF THE DIFFERENT PHASES DIFFERED WITH THE DIFFERENT CEMENTS. THE RESULTS WERE ANALYZED IN TERMS OF THE VARIOUS THEORIES PROPOSED TO EXPLAIN THE HARDENING OF CEMENTS. /AUTHOR/

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/08879672
• Supplemental Notes:
  • 14 PP
• Authors:
  • Blaine, R L
  • Tomes, L A
• Publication Date: 1972-3

Media Info

• Serial:
  • PRECAST/PRESTRESSED CONCRETE INSTITUTE. JOURNAL
  • Volume: 17
  • Issue Number: 2
  • Publisher: Precast/Prestressed Concrete Institute
  • ISSN: 0887-9672

Subject/Index Terms

• TRT Terms: Cement paste; Concrete hardening; Hardness; Mortar; Portland cement; Shear strength; Theory; Vane shear tests
• Subject Areas: Highways; Materials;

Filing Info

• Accession Number: 00214151
• Record Type: Publication
• Files: TRIS
• Created Date: Jul 17 1972 12:00AM