TH8370A - Composite concrete floor structure - Google Patents

Abstract

The precast concrete slab structure was exposed to achieve the required strength equivalent to a single-piece slab structure. It was formed using formwork and timber without adding weight. The slab was constructed using precast reinforced concrete slabs with a top surface containing numerous typically cylindrical voids, and a concrete layer superimposed on the precast reinforced concrete slab. The concrete layer has a bottom surface with numerous typically cylindrical shear wedges protruding downwards and tightly interlocking with the cylindrical voids of the precast reinforced concrete slab. These shear wedges prevent relative movement between the precast reinforced concrete slab and the concrete layer in all horizontal directions under the action of bending forces.

Claims (4)

1. A composite concrete floor structure consisting of (a) a precast reinforced concrete slab with a top surface formed by numerous general cylindrical voids, and (b) a concrete layer superimposed on the precast reinforced concrete slab, where the bottom surface of the concrete layer is formed by numerous general cylindrical shear wedges extending downwards and tightly interlocking with the cylindrical voids of the precast reinforced concrete slab. These shear wedges prevent relative movement between the precast reinforced concrete slab and the concrete layer in all horizontal directions under the action of bending forces. 2. Prefabricated reinforced concrete floor structure as entitled in Requisition 1, where voids on the surface of the prefabricated reinforced concrete floor are formed by typical cylindrical indentations. 3. The composite concrete slab structure supported on the building's beams consists of (a) multiple precast reinforced concrete slab sections with top surfaces and supports at the beam ends of the building. The ends of the precast reinforced concrete slabs are spaced apart on the beams. The top surface of each precast reinforced concrete slab section contains numerous typical cylindrical voids. (b) Several anchors protrude from the building's beams into the spaces between the ends of the precast reinforced concrete slabs. (c) Several reinforcing bars are attached to the anchors above the precast reinforced concrete slabs. (d) A ready-mixed concrete layer is placed over the precast reinforced concrete slabs and in the spaces between them to cover the reinforcing bars and anchors. The underside of the ready-mixed concrete layer has numerous typical cylindrical shear wedges protruding downwards to interlock with the voids of the precast reinforced concrete slabs. This interlocking of the shear wedges with the precast reinforced concrete slabs prevents relative movement between the precast reinforced concrete slabs and the overlapping concrete layer in all horizontal directions, thus enabling the slab to function as a single, multidirectional composite floor. 4. Precast reinforced concrete floor structure in accordance with claim 3, whereby the precast reinforced concrete floor contains 500 pore spaces per square meter, and whereby each pore has a diameter of approximately 25 millimeters and a depth of approximately 5 millimeters (Clause 4, page 2, figure 9).