Lightweight concrete panel

Abstract

A lightweight cast concrete panel including concrete having a wet weight of between about 132 to about 140 pounds per cubic foot, and air content of between about 7 to about 11 percent.

1 . A concrete panel, concrete in said panel having entrained air between about 7 and about 11%, said concrete having a wet weight of between 2144 to 2242 kilograms per cubic meter (132 and 140 pounds per cubic foot). 
   
   
       2 . A concrete panel including prestressed cables throughout the concrete panel, concrete in said panel having entrained air between about 7 and about 11%, said concrete having a wet weight of between 2144 to 2242 kilograms per cubic meter (132 and 140 pounds per cubic foot). 
   
   
       3 . A cast concrete panel having an upper and a lower surface and at least one layer of reinforced concrete, at least one layer of said concrete in said panel having entrained air between about 7 and about 11%, said concrete having a wet weight of between 2144 to 2242 kilograms per cubic meter (132 and 140 pounds per cubic foot). 
   
   
       4 . The cast concrete panel of  claim 3  further including a plurality of foam billets therewithin. 
   
   
       5 . The cast concrete panel of  claim 4  wherein said concrete panel is cast with a lower concrete layer and an upper concrete layer, said lower concrete layer encasing said foam billets, one of said concrete layers having a different air entrainment percentage than said other concrete layer.