E - Fixed Constructions – 04 – B
Patent
E - Fixed Constructions
04
B
72/92
E04B 5/48 (2006.01) E04B 1/16 (2006.01) E04B 1/18 (2006.01) E04B 2/84 (2006.01)
Patent
CA 1048749
Inventor: ROBERT K. STOUT APPARATUS AND METHOD FOR MAKING CONCRETE STRUCTURES ABSTRACT A device to be embedded in a concrete structure in order to define a labyrinth of passageways within the concrete structure comprises a void creating device formed of frangible material and which is an elongated hollow member preferably made of two interfitting sections, with the hollow member having at least two opposed projections disposed intermediate the length of the hollow member. When embedded in concrete, the ends of the elongated hollow member and the ends of the opposed projections ex- tend to the surface of the concrete such that such pro- jecting frangible elements may be pushed out or removed in order to enable the passage of service lines through the interior of the concrete structure. The subject method for making a cast-in-place concrete structure comprises the steps of forming an arrangement of concrete forms; placing a plurality of said void creating devices within the confines of and spaced from the concrete forms, with the respective projections of adjacent devices abutting one another in order to enable internal communi- cation between said devices, and with the ends of the devices and the non-abutting projections thereof exten- ding to the periphery of the concrete forms, and pouring uncured concrete into the spaces in and around and in intimate contact with the void creating devices, and allow- ing the concrete to cure. Subsequently, the frangible ends and exposed projections of the void creating devices may be knocked out in order to provide access into the labyrinth of passageways defined by the hollow devices within the interior of the composite concrete structure. The subject void creating devices and the subject method result in a one-process system for achieving a one-layer, composite, self-insulating concrete construction unit, which unit may be individually finished on both sides.
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