Techniques for producing lightweight insulating-type composites with uniform polymer distributions have been developed. Three lightweight aggregates, perlite, vermiculite, and foamed glass, were evaluated and perlite was selected for continued evaluation. Two monomers, methyl methacrylate (MMA) and polyester-styrene, was used in these studies. Structural properties equivalent to or greater than those of high quality normal weight concrete have been obtained with perlite-concrete composites containing 50 to 60 volume percentage polymer. The densities of these materials range between 60 and 75/lb cu ft. Non-air-entrained 1:8 perlite concrete specimens impregnated with MMA exhibited average compressive, tensile splitting, and flexural strengths of 7800, 1440, and 1700 psi, respectively. Samples impregnated with polyester-styrene have lower strengths than MMA-impregnated specimens. Freeze-thaw tests of impregnated lightweight materials are in progress but data are not yet available. Testing of a perlite concrete sewer pipe in 5 percent sulfuric acid has indicated no attack after exposure for 120 days. Preliminary designs for breakaway luminaries constructed with impregnated perlite concrete have been made and a 5-ft prototype section constructed. Based upon this work the fabrication of larger sections appears to be technically feasible. /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 40-8.
  • Corporate Authors:

    American Concrete Institute

    P.O. Box 19150, Redford Station, 22400 Seven Mile Road
    Detroit, MI  United States  48219
  • Authors:
    • Kukacka, L E
  • Publication Date: 1973-11

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Filing Info

  • Accession Number: 00264793
  • Record Type: Publication
  • Report/Paper Numbers: Proceeding
  • Files: TRIS
  • Created Date: Feb 11 1975 12:00AM