Patent ID: 8191324
Filing Date: 2012-06-05
Classification: C04B,E04B,E04F,F24D,Y02B,Y10T

Abstract:
1. A floor overlying an underlying support surface in the form of a prepared earth base or layer of aggregate or gravel, the floor comprising rigid flooring panels, the flooring panels each comprising: 1) a cementitious upper layer providing a durable upper surface of a given density suitable for use as part of a floor surface; 2) an intermediate lower density layer beneath the upper layer containing lower density particulate material bonded together by a higher density binder that forms a binder matrix around the low density particulate material containing and fixing the position of the low density particulate material, the overall average density of the intermediate layer being less than the average density of the upper layer, and 3) a tensile constraining lower layer located beneath and on the underside of the intermediate layer to cover and contain the intermediate layer, there being present between the flooring panels and the support surface localized deposits of supporting cementitious mortar placed on the underlying and in contact with an underside surface of the flooring panels so as to that provide an interconnected airspace there between for the containment of under-floor vapors and gases wherein the flooring panels are provided with interfitting edges in the form of a shiplap joint having ledges to permit a plurality of such flooring panels to be assembled contiguously to each other with the overlapping ledges providing over-lapping interfaces along such joints by lowering such panels into place.