Chemical induced pre-stressed zones in concrete
OwnerSteven Highinventor
Life of this patent
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Abstract
A method and apparatus for creating pre-stressed zones in concrete. In one embodiment, a circular blade is coated with a chemical which retards the setting of the concrete. The circular blade is then rolled through the wet concrete, thus transferring the retarding chemical from the blade into the concrete. The region of wet concrete that has the retarding chemical introduced into it does not set until after the surrounding concrete has set and shrunk, thus creating a pre-stressed zone which typically manifests itself as a crack, visible upon setting of the wet concrete. Other embodiments describe alternative ways of introducing the chemical into the wet concrete.
Claims51
A method for creating a pre-stressed zone in concrete comprising the steps of:
- laying down wet concrete;
- physically penetrating a top surface of the wet concrete;
- applying a chemical capable of retarding, delaying or inhibiting setting of the wet concrete at the physical penetration;
- setting the wet concrete;
- and
- creating the pre-stressed zone in the concrete during or after the setting of the concrete.
An apparatus for applying a chemical to wet concrete comprising:
- an applicator;
- a chemical system comprising a chemical capable of retarding, delaying or inhibiting setting of the wet concrete;
- said chemical system disposing the chemical on said applicator;
- and
- said applicator penetrating a surface of the wet concrete, with the chemical disposed thereon.
Dependencies are inferred from the claim text.