Pre-treatment and cleaning of equipment used with uncured cementitious materials
First Claim
1. A system for treating equipment for mixing, placing or finishing a cementitious material, comprising:
- an aqueous composition consisting essentially of a colloidal silica, a stabilizer for enabling the colloidal silica to remain suspended at a pH of 10 or less, surfactant, and water, the aqueous composition formulated to include the colloidal silica in an amount that softens cementitious material that previously hardened and adhered to a surface of the equipment; and
an abrasive element capable of removing cementitious material wetted and softened by the colloidal silica of the aqueous composition from the surface of the equipment.
8 Assignments
0 Petitions
Accused Products
Abstract
A composition for pretreating surfaces of equipment for use with an uncured cementitious material, such as uncured concrete, and/or for cleaning cured cementitious material from the surfaces of such equipment includes an aqueous solution with colloidal silica. Pretreatment of a surface with such an aqueous solution may reduce or eliminate adhesion of uncured cementitious material to the surface. Cured cementitious material may be removed from equipment surfaces by wetting the cured cementitious material with the aqueous solution to chemically soften the cured cementitious material, along with abrading the cured cementitious material to mechanically remove the same from the equipment surfaces. Systems for removing cured cementitious material from the surfaces of equipment configured to use with uncured cementitious material include an abrasive element and an aqueous solution with colloidal silica.
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Citations
19 Claims
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1. A system for treating equipment for mixing, placing or finishing a cementitious material, comprising:
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an aqueous composition consisting essentially of a colloidal silica, a stabilizer for enabling the colloidal silica to remain suspended at a pH of 10 or less, surfactant, and water, the aqueous composition formulated to include the colloidal silica in an amount that softens cementitious material that previously hardened and adhered to a surface of the equipment; and an abrasive element capable of removing cementitious material wetted and softened by the colloidal silica of the aqueous composition from the surface of the equipment. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for pre-treating equipment for mixing, placing or finishing a cementitious material, comprising:
applying an aqueous composition consisting essentially of colloidal silica, a stabilizer for enabling the colloidal silica to remain suspended at a pH of 10 or less, surfactant, and water to a surface of equipment for mixing, placing or finishing concrete before exposing the surface to wet concrete. - View Dependent Claims (8, 9, 10, 11)
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12. A method for removing cementitious material from equipment configured for mixing, placing or finishing the cementitious material, comprising:
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applying an aqueous composition consisting essentially of colloidal silica, a stabilizer for enabling the colloidal silica to remain suspended at a pH of 10 or less, surfactant, and water to a surface of equipment for mixing, placing or finishing cementitious material to enable the colloidal silica to soften the cementitious material that previously hardened and adhered to the surface of the equipment; and abrading the cementitious material softened by the colloidal silica of the aqueous composition from the surface. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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Specification