Method and apparatus for producing an inorganic foam structure for use as a durable acoustical panel

A process and apparatus for creating an acoustically absorbent porous panel comprises the steps of dispensing cement and fibers with a dry mixer to create a dry mix and aqueous mixing water, surfactant and air with an aqueous mixer to create a foam. The process and apparatus provides for combining a...

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Bibliographische Detailangaben
Hauptverfasser:	HALLETT, CHESTER W, PUTT, DEAN L, HARTMAN, JOHN J. JR, MOSER, ANDREA M
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	ACOUSTICS ACOUSTICS NOT OTHERWISE PROVIDED FOR ARTIFICIAL STONE BUILDING BUILDING MATERIALS CEILINGS CEMENTS CERAMICS CHEMISTRY COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS CONCRETE FIXED CONSTRUCTIONS FLOORS GENERAL BUILDING CONSTRUCTIONS INSULATION OR OTHER PROTECTION OF BUILDINGS LAYERED PRODUCTS LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM LIME, MAGNESIA METALLURGY METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING,NOISE OR OTHER ACOUSTIC WAVES IN GENERAL MUSICAL INSTRUMENTS PERFORMING OPERATIONS PHYSICS PREPARING CLAY PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL,e.g. PLASTER REFRACTORIES ROOFS SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS, SLAG, OR MIXTURESCONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER SLAG SOUND-PRODUCING DEVICES STRUCTURAL ELEMENTS TRANSPORTING TREATMENT OF NATURAL STONE WALLS, e.g. PARTITIONS WORKING CEMENT, CLAY, OR STONE
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Beschreibung
Zusammenfassung:	A process and apparatus for creating an acoustically absorbent porous panel comprises the steps of dispensing cement and fibers with a dry mixer to create a dry mix and aqueous mixing water, surfactant and air with an aqueous mixer to create a foam. The process and apparatus provides for combining and mixing the foam and dry mix in a combining mixer to form a foamed cementitious material comprising on a wet basis about 53% to about 68% by weight cement, about 17% to about 48% by weight water, about 0.05% to about 5% by weight fibers, and about 0.01% to about 10% by weight surfactant. The foamed cementitious material is then dried or cured in a drying chamber. The dried foamed cementitious material may then textured with an embossing roller. The cementitious material provides good acoustical performance with enhanced durability and moisture resistance.