Lightweight concrete
AssigneeMatrix Composites & Engineering Ltd
InventorGary Charles Strickland
Life of this patent
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Abstract
The present disclosure relates to a cement or concrete composition comprising a hydraulic binder, a water reducing plasticiser, a rheological additive, and composite spheres for lowering the density of the composition, wherein the composite spheres comprise a core having one or more coating layers thereon.
Claims30
A cement or concrete composition comprising a hydraulic binder, a water reducing plasticiser, a rheological additive, and composite spheres for lowering the density of the composition, wherein each of the composite spheres comprises a core having one or more coating layers thereon, and wherein the one or more coating layers on a core are independently selected from at least one of a fibre layer, aggregate layer and cement layer.
The cement or concrete composition of any one of the preceding claims, wherein the composition comprises composite spheres of substantially uniform size and composition.
The cement or concrete composition of any one of the preceding claims, wherein a diameter of the composite spheres is between 1 mm and 100 mm.
The cement or concrete composition of any one of the preceding claims, wherein the composition comprises at least a first and second type of composite spheres each having different size ranges, wherein the first type of composite spheres have a diameter of between 25 to 100 mm and the second type of composite spheres have a diameter of 1 to 10 mm.
The cement or concrete composition of any one of the preceding claims, wherein the core comprises a polymer core.
The cement or concrete composition of any one of the preceding claims, wherein the polymer core of the composite spheres is expanded polystyrene.
The cement or concrete composition of any one of the preceding claims, further comprising glass microspheres.
The cement or concrete composition of any one of the preceding claims, further comprising ceramic microspheres.
The cement or concrete composition of any one of the preceding claims, further comprising a fine aggregate material.
The cement or concrete composition of any one of the preceding claims, wherein the composition is a dry blend composition for preparing a low density concrete.
A concrete material prepared from or comprising the composition or an admixture of the composition of any one of the preceding claims and water.
A plurality of composite spheres for use in lowering the density of a concrete material, wherein each composite sphere comprises a core having one or more coating layers thereon, the one or more coating layers each independently selected from a coating layer comprising a polymer with at least one of a fibre, aggregate or cement.
Dependencies are inferred from the claim text.