Method of making lightweight granules coated with cementitious material
AssigneeMazedawn Limited
InventorLaszlo Kovacs
Life of this patent
Estimating the term…
Abstract
In producing an additive for a building material, lightweight granules (e.g., polystyrene beads) are first coated with a waterproof adhesive by mixing in a suitable mixer. When the granules are satisfactorily coated, they are further coated with a wet cementitious material, for example aggregate and wet cement, or with wet plaster, which is added to the mixture. Only sufficient moisture is added to allow the cement or plaster to initiate the chemical reaction which results in the curing of the coating material on the granules. The wet material acts to separate the granules while forming a coating thereon. The granules are then removed from the mixture and allowed to dry and set. The dry granules may then be added to a conventional concrete or plaster mix.
Claims10
A method of making a lightweight building additive comprising discrete granules of a lightweight material each coated with an adhesive to which is adhered a cured cementitious coating material, said method comprising the consecutive steps of:
- mixing said granules of a lightweight material with said adhesive in a mixer to form an adhesive coating thereon;
- adding a wet cementitious coating material to said mixer and mixing said cementitious coating material with the adhesive coated granules until the adhesive coated granules become coated with the cementitious coating material and separated;
- removing said granules from the mixer;
- and
- drying said granules to produce granules with a cured cementitious coating.
A method of making a cementitious building material with a lightweight additive comprising discrete granules of a lightweight material each coated with an adhesive to which is adhered a cured cementitious coating, said method comprising the consecutive steps of:
- mixing said granules of a lightweight material with said adhesive in a mixer to form an adhesive coating thereon;
- adding a wet cementitious coating material to said mixer and mixing said cementitious coating material with the adhesive coated granules until the adhesive coated granules become coated with the cementitious coating material and separated;
- removing said granules from the mixer;
- drying said granules to produce granules with a cured cementitious coating;
- and
- adding said granules to said cementitious building material.
A method of making a building additive comprising discrete granules of a lightweight material each coated with an adhesive to which is adhered a cured cementitious coating material, said method comprising the consecutive steps of:
- mixing granules of an expanded plastic material in a rotary mixer with an EVA (ethylene vinyl acetate) adhesive to form an adhesive coating thereon;
- adding a wet cementitious material to the adhesive coated granules in said rotary mixer;
- rotating said mixer so as to mix said wet cementitious material with said adhesive coated granules until said granules become coated with a cementitious coating and separated;
- and
- removing said coated granules from said mixer and drying said granules so as to produce granules with a cured cementitious coating.
Dependencies are inferred from the claim text.