LOSSES IN TRANSMISSION LENGTH AND PRESTRESS IN HIGH ALUMINA CEMENT CONCRETE

There is some evidence to show that the reduction in strength of high alumina cement concrete due to conversion can cause considerable shear distress in the end zones and possibly even some bond slip. If no shear reinforcement is provided the strength and serviceability of such pretensioned members may be in question. Some interim data on the transmission length and prestress losses of high alumina cement concrete beams having an unconverted strength of 80-100 n/mm2 and with an applied stress at transfer of 30-40 n/mm2 are reported. The beams were subjected to field conditions such as sudden release of prestress and exposure to uncontrolled internal environment. The results show that the sudden release of prestress can lead to large increases in transmission length and that cp 110 underestimates the transmission length for strands. With high alumina cement concrete there is some increase in transmission length with time. (A) /TRRL/

Media Info

  • Features: Figures; References; Tables;
  • Pagination: p. 293-307
  • Serial:
    • Volume: 59
    • Issue Number: 2

Subject/Index Terms

Filing Info

  • Accession Number: 00127990
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: Apr 7 1976 12:00AM