What is G.R.G ?

GRG is a composite of high-strength gypsum and glass fibers, which can be factory molded into virtually any size or shape.

  • DESCRIPTION TYPICAL VALUES
    Glass fiber 5 – 6% by weight
    Shell thickness 1/2” (12.7 mm)
    Weight ± 2 lb/ft2 (32 kg/m2)
    ASTM D790 Tensile strength 1360 psi (9.4 MPa)
    Flexural strength 4220 psi (28.4 MPa)
    ASTM D695 Compressive strength 7600 psi (48.5 MPa)
    ASTM D256 Impact 8.34 ft-lb/in (43.7 kJ/m2)
  • %
    • Gypsum (Calcium Sulfate)           85
    • Glass fiber            4-5
    • Portland Cement         4-5
    • Sand,Crystaline Silica        4-5

  • Physical State……………………………………………………………… Semi-Solid

    Boiling Point……………………………………………………………….. 750F (398C)

    Freezing/Melting Point…………………………………………….. -40F (-4C)/500F (260C)

    Vapor Pressure………………………………………………………… Not Determined

    Vapor Density (Air=1)……………………………………………….. Negligible

    Evaporation Rate…………………………………………………….. Not Determined

     Solubility in Water…………………………………………………. Negligible

    Specific Gravity (Water=1) ……………………………………… 0.8700

     Density, lb./gal. …………………………………………………….. 7.250

     Volatility (Volume)………………………………………………… Negligible

     VOC……………………………………………………………………… Unknown

     PH………………………………………………………………………… Essentially Neutral

     Coefficient of Water/Oil Distribution………………………. Not Determined

     Odor…………………………………………………………………….. Mild, Bland, Hydrocarbon Odor

     Odor Threshold…………………………………………………….. Not Determined

    Appearance……………………………………………………………. Off-White Opaque Semi-Solid