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Method for producing materials from recycled glass and cement compositions

  • US 7,700,017 B2
  • Filed: 08/24/2004
  • Issued: 04/20/2010
  • Est. Priority Date: 08/25/2003
  • Status: Expired due to Fees
First Claim
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1. A process to produce recycled glass/cement panels comprising:

  • (a) delivering materials including (i) 25-79% by weight of glass having a particle size in the range of 1 μ

    m to 25 mm;

    (ii) 19-30% by weight Portland cement; and

    (iii) an alkali-silica reaction suppressant selected from the group consisting of metakaolin, fly ash, silica fume and blast furnace slag present in an amount up to 22% by weight(b) adding up to 3% by weight of a dispersant and water to said materials to create a slurry that is inert, non-toxic and greater than 90% inorganic material, wherein the water content in said slurry ranges from 4% to 20% by weight;

    (c) mixing said slurry under conditions to avoid curing of the product during operation and to breakdown agglomerate and to mix said slurry;

    (d) casting said slurry into a mold having a dimension ranging from 48″

    ×

    96″

    to 60″

    ×

    120″

    ;

    (e) vibrating said mold to further spread said slurry in the mold evenly and to release all entrapped air at a vibration frequency in the range of 10-200 Hz and a vibration amplitude in the range of 0-5 mm;

    (g) curing said mold at temperatures ranging from 50 to 185°

    F. with a humidity range from 70% RH to 100% RH; and

    (h) removing the recycled glass/cement panel from said mold wherein said panel has a compressive strength between 2000-16,750 psi, a flexural strength between 648-1170 psi and a porosity between 0.1% to 6.5%.

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