Cellular glass product and process for making the same

A cellular glass product having a density, D, in the range of 70 kg/m3 to 110 kg/m3, provided that when the cellular glass product has a density, D, in the range of 70 kg/m3 to less than 95 kg/m3 or more than 105 kg/m3, the cellular glass product has an average cell diameter, dc, that is at most 97% of d, and provided that when the cellular glass product has a density, D, in the range of 95 kg/m3 to 105 kg/m3, the cellular glass product average cell diameter, dc, is at most 90% of d;

• whereby
• d
• =
• C
• a
• 1
• 1
• -
• D
• B
• 3
• -
• (
• 1
• +
• C
• b
• )
• wherein:
• d is the reference average cell diameter, expressed in meters (m),
• D is the density of the cellular glass product, expressed in kg/m3, at ambient temperature,
• B is the density of the bulk solid glass material forming the cell walls of the cellular glass product, expressed in kg/m3, at ambient temperature
• Ca=5.96×10−6, and
• Cb=9.51×10−3.