THE PROPERTIES OF CEMENT PASTE COMPACTED UNDER HIGH PRESSURE

THE LIMITING STRENGTH OF THE BONDING MATRIX IN CONCRETE FORMED BY THE CEMENT PASTE IS DETERMINED. THE TECHNIQUES OF POWDER METALLURGY HAVE BEEN USED TO MAKE COMPACTS, UNDER HIGH PRESSURE, OF CEMENT POWDER WHICH ARE SUBSEQUENTLY HYDRATED. THESE HAVE PRODUCED WHAT IS, IN EFFECT. A NEW MATERIAL HAVING STRENGTHS UP TO 375 N/SQ. MM. (55,000 LB/SQ. IN) IN COMPRESSION, AND UP TO ABOUT 25 N/SQ MM. (3,600 LB/ SQ. IN.) IN TENSION. MODULUS OF ELASTICITY, SPECIFIC CREEP, AND SHRINKAGE STRAINS FOR PRESSED CEMENT PASTES HAVE BEEN FOUND TO BE APPROXIMATELY THE SAME AS FOR NORMALLY COMPACTED CONCRETE; LARGER LONG-AND SHORT-TERM STRAINS THAN USUAL MUST THEREFORE BE EXPECTED IF PRESSED CEMENT IS USED AT THE SAME STRESS/STRENGTH LEVEL. AUTOCLAVE CURING APPEARS TO REDUCE LONG-TERM STRAINS. THE POSSIBILITIES OF MODIFYING THE MODE OF FAILURE OF PRESSED CEMENT BY CONSTRAINING THE MATERIAL HAVE BEEN INVESTIGATED BRIEFLY. A DETAILED STUDY AND A LITERATURE SURVEY ON THE TECHNIQUE OF HIGH-PRESSURE COMPACTION ARE INCLUDED.

  • Supplemental Notes:
    • Research RePT 19, 21 PP
  • Corporate Authors:

    Cement and Concrete Association

    52 Grosvenor Gardens
    London SW1W 0AQ,   England 
  • Authors:
    • Lawrence, C D
  • Publication Date: 1969-6

Subject/Index Terms

Filing Info

  • Accession Number: 00213711
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jun 29 1970 12:00AM