Patent ID: 8215079

Claim:
A building block capable of accepting and holding a wood screw or nail in usage, said block being uniformly fabricated from molding, extruding, or compressing the blocks into a high strength, medium weight building block, said block fabricated into a multi-sided integrated block, and being entirely molded from a formulation of ingredients which when the ingredients are mixed and, treated with water there occurs a pozzolanic reaction, the mixture of ingredients including: class C fly ash containing calcium oxide and mixed with silica which in the presence of water initiates a pozzolanic reaction to form a calcium silicate hydrate combination; ground cellulosic material or other aggregate material in the fibrous or solid state form selected from ground wood and wood chips, having a fibrous length of approximately ⅛ inch to 11/16 inch in length, and being approximately 1/16 inch in diameter or width, and mixed in the formulation between about ten percent (10%) to sixty-five percent (65%) by weight of the mixed formulation; ground dehydrated gypsum added to the composition in an amount of between about 3% to 5% by weight of mixture; a surfactant solution functioning as a wetting agent and maintaining flow-ability to the mixture when water is added to the mixture up to approximately 2% by weight of the formulation; water added in the range of about ten percent (10%) to about twenty percent (20%) by weight of the mixed formulation; adding to the composition one or more fire retardant, and an insecticide, to make the block mold resistant and resistant to deterioration by insects, said fire retardant comprising boron, added in the range of one-half percent (½%) to five percent (5%) by weight of the mixed formulation to furnish the fire retardency and as a preventer of insect infestation to the molded block; a plasticizer added to the ingredient mixture in a amount of about one-eighth percent (⅛%) to two percent (2%) by weight of the mixture; and whereby pressure in the range of about 200 psi to 600 psi is applied to said mixed ingredient formulation as the pozzolanic reaction commences to form the mixture into the block form.