Monolithic water-permeable concrete roadway and related large area structures with integral drainage elements
OwnerArthur Shawinventor
Life of this patent
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Abstract
Large area concrete structures, such as roadways, parking lots and playing field bases are monolithically cast with integral drainage elements using an especially formulated water-permeable concrete material having strength and durability to conventional concrete. Such structure provide minimal interference with natural water flow patterns, optimal use of available land, and minimal harm to adjacent vegetation.
Claims12
In a concrete roadway of the type comprising an elongated structure of concrete having a thickness, width and generally flat upper surface for accommodating and supporting vehicular traffic, the improvement wherein said roadway comprises a monolithic structure of water-permeable concrete comprising:
- plural elements of coarse aggregate each having a size in the range of 1/8 to 1/4 of an inch, each cubic yard of aggregate elements having been sized in an aqueous suspension of 15 to 22 pounds of silicon dioxide of no greater than 100 mesh in 16 to 22 gallons of water;
- and
- between 384 and 480 pounds of cement for each cubic yard of sized aggregate elements, the elements of coarse aggregate being cemented together at points of contact by a layer of cement to provide a plurality of voids between adjacent ones of said elements of aggregate.
In a large concrete structure, such as a parking lot or playing field base of the type comprising a large area structure of concrete having thickness and generally flat upper surface for supporting human and vehicular traffic, the improvement wherein said structure comprises a monolithic structure of water-permeable concrete comprising:
- plural elements of coarse aggregate each having a size in the range of 1/8 to 1/4 of an inch, each cubic yard of aggregate elements having been sized in an aqueous suspension of 10 to 15 pounds of silicon dioxide of no greater than 100 mesh in about 12 gallons of water;
- and
- about 240 pounds of cement for each cubic yard of sized aggregate elements, the elements of coarse aggregate being cemented together at points of contact by a layer of said cement to provide a plurality of voids between adjacent ones of said aggregate.
Dependencies are inferred from the claim text.