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US 4,790,691 AGranted
Fiber reinforced soil and method
OwnerW. Wayne Freedinventor
Life of this patent
Estimating the term…
Abstract
Composite mixtures comprise soil and from about 0.1 to 5 percent by weight of additive fiber. A related method for improving the engineering properties of soil includes the steps of adding from about 0.1 to 5 percent by weight of fibers to soil and mixing the fibers and soil together to form a blend.
Claims9
Reinforced soil having improved engineering properties for construction and excavation purposes comprising:
- natural soil selected from the group consisting of gravel, sand, silt, clay and mixtures thereof;
- and
- from about 0.1 to 5 percent by weight of a fiber additive mixed therein to improve the punching shear resistance, the total angle of internal friction, the average total cohesion and the average initial tangent modulus of said soil, said fiber additives being selected from the class consisting of thermoplastic polymers and fiberglass which fiber additives do not deteriorate in soil.
A method for improving the engineering properties of natural soils for construction and excavation purposes comprising the steps of:
- adding from about 0.1 to 5 percent by weight of a fiber additive to natural soil to improve the punching shear resistance, the total angle of internal friction, the average total cohesion and the average initial tangent modulus of said soil, wherein said fiber additives are selected from the class consisting of thermoplastic polymers and fiberglass which fiber additives do not deteriorate in soil and said natural soil is selected from the group consisting of gravel, sand, silt, clay and mixtures thereof;
- and
- mixing said fiber additives and natural soil together to form a blend.
Dependencies are inferred from the claim text.