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US 7,255,738 B2Granted
Lightweight cementitious composite material
AssigneeConservation Roofing Systems, Inc.
InventorBlaine K. Semmens
Life of this patent
Estimating the term…
Abstract
A lightweight cementitious composite material includes expanded synthetic polymer particulate having a particle size of between 0.0625 and 0.5 inches. A dispersant coating on said particulate suppresses electrostatic attraction between particulate particles. A matrix surrounds the particulate and is present from 0.25 to 1 pound per gallon of dispersant coated particulate.
Claims10
A process for preparing a light weight structure comprising the steps of:
- passing an expanded polystyrene through a plurality of meshes to remove a fraction therefrom of particles having dimensions of less than 0.0625 inches and greater than 0.5 inches to obtain an expanded polystyrene particulate;
- mixing a dispersant suppressive of electrostatic attractions in an amount of 0.125 to 0.50 pounds per gallon of said polystyrene with said expanded polystyrene particulate to form a dry lightweight dispersal;
- thereafter combining said dispersal with a matrix material selected from a group consisting of magnesium oxy-chloride cement magnesium oxy-sulfate cement, sulfa alumina cement, silicate cement, and polymer modified Portland cement at a ratio of between 0.25 to 0.75 pound of said matrix material per gallon of said dispersal;
- wetting said dispersal with water;
- and
- allowing sufficient time for said matrix material to set.
3 more elements
Dependencies are inferred from the claim text.