초록 ▼

A breathing system for a steel reinforced concrete slab or pile slab allows water to penetrate the slab from both directions, upward and downward, thereby relieving any water pressure differential across the slab. This minimizes stresses on the slab, and maintains the water table. A plurality of ape

A breathing system for a steel reinforced concrete slab or pile slab allows water to penetrate the slab from both directions, upward and downward, thereby relieving any water pressure differential across the slab. This minimizes stresses on the slab, and maintains the water table. A plurality of apertures are distributed over the surface of the slab, and extend between the upper and lower surfaces. Each aperture may include a pipe. The apertures are evenly spaced apart in between the reinforcing bars, so as not to compromise the strength of the slab. The apertures will allow water to penetrate evenly over the entire surface of the slab. Layers of sand or crushed stone adjacent the upper and lower surfaces convey water to and from the apertures.

대표청구항 ▼

[ I claim:] [1.] A breathing system for a concrete slab having an upper surface and a lower surface, the breathing system comprising a plurality of apertures distributed over the upper and lower surfaces, each aperture extending between the upper and lower surfaces, so as to provide fluid communicat

[ I claim:] [1.] A breathing system for a concrete slab having an upper surface and a lower surface, the breathing system comprising a plurality of apertures distributed over the upper and lower surfaces, each aperture extending between the upper and lower surfaces, so as to provide fluid communication between the upper and lower surfaces, thereby relieving water pressure differential in all directions across the slab, and;an upper layer of water permeable material disposed closely adjacent the upper surface, so as to convey water to and from the apertures.