Concrete module unit
AssigneeChampion International Corporation
InventorsAllen T. Roudebush, Kenneth P. Thompson
Life of this patent
Estimating the term…
Abstract
A casting sheet comprising medium to high density polyethylene provides low release resistance when used as a liner for casting concrete articles. The casting sheet may comprise polyethylene-coated paperboard having a polyethylene coating on both sides, and such sheet be employed, for example, as a separator for concrete wall panels cast on-site in a superposed manner for tilt-slab construction or for other concrete construction.
Claims13
An assembly for use in the construction of building walls, which comprises a plurality of spaced, superposed concrete module layers and a plurality of thin, flexible casting sheet means having a low release resistance when separated from said module layers after hardening thereof, each of said casting sheet means comprising a thin, flexible base sheet, each of said base sheets being generally planar, at least one side of each base sheet having a thin coating of polyethylene having a density of 0.930 to 0.965 gm./cc., each of said module layers being separated from the other of said module layers by said casting sheet means.
A concrete module unit comprising a concrete layer having a thin, flexible casting sheet means having a low release resistance when separated from said concrete layer after hardening thereof superimposed adjacent at least one surface of said concrete layer, said casting sheet means comprising a thin, flexible base sheet, said base sheet being generally planar, at least one side of said base sheet having a thin coating of polyethylene having a density of 0.930 to 0.965 gm./cc., said polyethylene coating being in contact with said surface of said concrete layer.
Dependencies are inferred from the claim text.