Methods of increasing scrap glass recycling

A cellular glass product produced from a glass composition comprising:

• a source of MnO in an amount of 0.4% to 2% by weight;
• BaO+SrO in an amount of 0.3% to 2% by weight;
• and at least one of the following:
• SiO2 in an amount from 55% to 75% by weight;
• Al2O3 in an amount from 1% to 10% by weight;
• CaO+MgO in an amount from 4% to 11% by weight;
• Na2O+K2O+Li2O in an amount from 12% to 18%% by weight, wherein the cellular glass product meets at least one of the following:
• the cellular glass product is a substantially closed cell foam;
• the cellular glass product has a density of about 75 kg/m3 to 300 kg/m3;
• the cellular glass product has a thermal conductivity of 0.033 W/mK to 0.06 W/mK;
• and
• the cellular glass product has a compressive strength of 0.4 MPa to 2.5 MPa.

A method of producing a cellular glass product comprising at least a portion of scrap material or recycled cullet, the method comprising:

• providing a source of raw glass materials in a melter, wherein the raw glass materials include two or more of virgin glass material, scrap material, and recycled cullet;
• providing a source of an oxidizing agent into the melter and mixing the oxidizing agent with the raw glass materials to form a glass melt, wherein the oxidizing agent is included in an amount to achieve a predetermined level of the oxidizing agent in the glass melt;
• cooling the glass melt;
• and
• subjecting a resulting glass material to a cellular glass production process.