Eight polymer-impregnated concrete (PIC) spherical model hulls with outside diameters of 16 in. (40.6 cm) and wall thicknesses of 1 or 2 in. (2.5 or 5.1 cm) were tested under external hydrostatic loading. The test results show that the PIC spheres respond to hydrostatic loading with elastic behavior. Implosion pressures for the PIC spheres with a uniaxial compressive strength of approximately 21,000 psi (145 N/sg mm) are greater by approximately 40 percent than those for similar regular concrete spheres whose uniaxial compressive strength is approximately 10,000 psi (69 N/sq mm). Under short term loading the PIC hulls with 1 and 2 in. (2.5 or 5.1 cm) thick walls imploded at average hydrostatic pressures of 4810 and 8475 psi (32.2 and 58.4 N/sq mm) respectively while 1-in. (2.5 cm) thick spheres subjected to long term and cyclic loading conditions imploded at 4000 psi (27.6 N/sq mm). Classical thick wall theory predicts the strain behavior and implosion pressures for the PIC spherical hulls within engineering accuracy. It is projected that the maximum operating depth for buoyant spherical PIC hulls will be approximately 400 ft (1220 m) in the ocean. /ACI/

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  • Supplemental Notes:
    • These abstracts are brief summaries of all ACI technical material published outside of these proceedings and are indexed in the Annual Proceedings Index. Number SP 40-6.
  • Corporate Authors:

    American Concrete Institute

    P.O. Box 19150, Redford Station, 22400 Seven Mile Road
    Detroit, MI  United States  48219
  • Authors:
    • Albertsen, N D
    • Haynes, H H
  • Publication Date: 1973-11

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  • Accession Number: 00264791
  • Record Type: Publication
  • Report/Paper Numbers: Proceeding
  • Files: TRIS
  • Created Date: Feb 11 1975 12:00AM