Patent ID: 6851235

Claim:
A building block comprising: a first exterior surface; first and second side surfaces coupled to the first exterior surface; a top surface coupled to the first exterior surface and to the first and second side surfaces; a bottom surface coupled to the first exterior surface and to the first and second side surfaces; a second exterior surface coupled to the first and second side surfaces, to the top surface, and to the bottom surface; wherein the building block comprises a mixture of water, cement, and expanded polystyrene (EPS) foam beads that have a diameter from 3.18 mm (⅛ inch) to 9.53 mm (⅜ inch) in the proportions of: from 68 to 95 liters (18 to 25 gallons) water; from 150 to 190 kg (325 to 425 lb) cement; and from 850 to 1400 liters (30 to 50 cubic feet) EPS foam beads.