US20020170648A1 - Asymmetrical concrete backerboard and method for making same - Google Patents
Asymmetrical concrete backerboard and method for making same Download PDFInfo
- Publication number
- US20020170648A1 US20020170648A1 US09/829,256 US82925601A US2002170648A1 US 20020170648 A1 US20020170648 A1 US 20020170648A1 US 82925601 A US82925601 A US 82925601A US 2002170648 A1 US2002170648 A1 US 2002170648A1
- Authority
- US
- United States
- Prior art keywords
- membrane
- core
- impervious
- construction element
- principal surface
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B19/00—Machines or methods for applying the material to surfaces to form a permanent layer thereon
- B28B19/0092—Machines or methods for applying the material to surfaces to form a permanent layer thereon to webs, sheets or the like, e.g. of paper, cardboard
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
- E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
- E04C2/26—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials composed of materials covered by two or more of groups E04C2/04, E04C2/08, E04C2/10 or of materials covered by one of these groups with a material not specified in one of the groups
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B23/00—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects
- B28B23/0006—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects the reinforcement consisting of aligned, non-metal reinforcing elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B13/00—Layered products comprising a a layer of water-setting substance, e.g. concrete, plaster, asbestos cement, or like builders' material
- B32B13/02—Layered products comprising a a layer of water-setting substance, e.g. concrete, plaster, asbestos cement, or like builders' material with fibres or particles being present as additives in the layer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B13/00—Layered products comprising a a layer of water-setting substance, e.g. concrete, plaster, asbestos cement, or like builders' material
- B32B13/04—Layered products comprising a a layer of water-setting substance, e.g. concrete, plaster, asbestos cement, or like builders' material comprising such water setting substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B13/08—Layered products comprising a a layer of water-setting substance, e.g. concrete, plaster, asbestos cement, or like builders' material comprising such water setting substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material of paper or cardboard
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B13/00—Layered products comprising a a layer of water-setting substance, e.g. concrete, plaster, asbestos cement, or like builders' material
- B32B13/04—Layered products comprising a a layer of water-setting substance, e.g. concrete, plaster, asbestos cement, or like builders' material comprising such water setting substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B13/12—Layered products comprising a a layer of water-setting substance, e.g. concrete, plaster, asbestos cement, or like builders' material comprising such water setting substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B13/00—Layered products comprising a a layer of water-setting substance, e.g. concrete, plaster, asbestos cement, or like builders' material
- B32B13/14—Layered products comprising a a layer of water-setting substance, e.g. concrete, plaster, asbestos cement, or like builders' material next to a fibrous or filamentary layer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
- B32B37/24—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer not being coherent before laminating, e.g. made up from granular material sprinkled onto a substrate
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
- E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
- E04C2/04—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of concrete or other stone-like material; of asbestos cement; of cement and other mineral fibres
- E04C2/06—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of concrete or other stone-like material; of asbestos cement; of cement and other mineral fibres reinforced
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2305/00—Condition, form or state of the layers or laminate
- B32B2305/08—Reinforcements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/726—Permeability to liquids, absorption
- B32B2307/7265—Non-permeable
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2315/00—Other materials containing non-metallic inorganic compounds not provided for in groups B32B2311/00 - B32B2313/04
- B32B2315/06—Concrete
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2315/00—Other materials containing non-metallic inorganic compounds not provided for in groups B32B2311/00 - B32B2313/04
- B32B2315/08—Glass
- B32B2315/085—Glass fiber cloth or fabric
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
- B32B37/16—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with all layers existing as coherent layers before laminating
- B32B37/20—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with all layers existing as coherent layers before laminating involving the assembly of continuous webs only
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49616—Structural member making
- Y10T29/49623—Static structure, e.g., a building component
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49616—Structural member making
- Y10T29/49623—Static structure, e.g., a building component
- Y10T29/49629—Panel
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
- Y10T442/10—Scrim [e.g., open net or mesh, gauze, loose or open weave or knit, etc.]
- Y10T442/102—Woven scrim
- Y10T442/171—Including a layer derived from a water-settable material [e.g., cement, gypsum, etc.]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
- Y10T442/20—Coated or impregnated woven, knit, or nonwoven fabric which is not [a] associated with another preformed layer or fiber layer or, [b] with respect to woven and knit, characterized, respectively, by a particular or differential weave or knit, wherein the coating or impregnation is neither a foamed material nor a free metal or alloy layer
- Y10T442/2041—Two or more non-extruded coatings or impregnations
- Y10T442/2049—Each major face of the fabric has at least one coating or impregnation
- Y10T442/2057—At least two coatings or impregnations of different chemical composition
- Y10T442/2066—Different coatings or impregnations on opposite faces of the fabric
Definitions
- This invention relates generally to a composite structural panel, and more particularly to an asymmetrical concrete backerboard having fiberglass mesh reinforcement on one side, and an impervious reinforcement membrane on the opposite side of the board.
- the conventional backerboard is made up of a rectangular panel of solid concrete, the concrete core, having both major surfaces covered with fiberglass.
- the fiberglass adds strength to the board, and provides only limited resistance to water penetration through the board.
- Concrete backerboards are used extensively in the construction of interior and exterior floors, walls and ceilings.
- the concrete backerboard is a superior substrate or underlayment for stucco, ceramic tile, marble, and other tile-like surfaces located in wet areas, such as shower walls and bathtub surrounds, and building exterior walls.
- the concrete core of the backerboard is a low density, high compressive strength, concrete core.
- the fiberglass mesh reinforcement layers overlay both major faces of the core, with each of these pervious fiberglass layers themselves covered with a thin layer of Portland cement.
- Backerboards have textured cementitious surfaces that provide for a high strength bond with mastics and Portland cement mortars that are used to adhere tile to the substrate in wet areas.
- the conventional backerboard is generally stable and water resistant, it is not an ideal construction panel for use in wet environments due to several inherent limitations. For example, it is generally recommended by backerboard manufactures, and required by most building codes, to use an additional impervious moisture barrier behind the backerboard. Thus, contractors are forced to install the backerboard and separate moisture barrier in the field, at the construction site.
- a impervious barrier membrane with the backerboard provides protection for the wood or steel structures under or behind the backerboard, and contains the moisture in the wet area. Examples of commonly used moisture barriers are felt paper, Tyvek®, spunbonded olefin and polyethylene.
- An exemplary patent in this field includes U.S. Pat. No. 3,284,980 to Dinkel disclosing a precast panel of cement and aggregate reinforced with a skin membrane of fibrous material.
- Backerboard manufacturing techniques include a lightweight aggregate core faced on each side or face with a fiberglass mesh material bathed in a slurry of neat cement and pressed against the aggregate core, such that when the neat cement and the aggregate core are cured, there is provided a composite, fiberglass mesh reinforced, cementitious panel.
- U.S. Reissue Pat. No. Re32,037 to Clear is a method for manufacturing cementitious reinforced panels and illustrates a concrete panel 11 having reinforcement layers 12 , 13 and a polyethylene layer 20 adjacent one of the layers 12 , 13 .
- Layers 12 and 13 are described as mesh reinforcing elements, preferably constituting fiber mesh like pervious webs, each entrained in hydraulic cement.
- Layer 20 is a carrier sheet placed under reinforcing element 12 during manufacture. Yet, such methods of constructing backerboards are not only deficient because they produce an inferior wet-area panel, but also because they require the use of a carrier sheet.
- the present invention is a backerboard having a fiberglass mesh on one side, and an impervious moisture barrier membrane on the other side.
- asymmetrical backerboard design incorporates numerous advantages over the conventional backerboard design, including having lower manufacture costs, having a waterproof panel deliverable on-site, and having a simplified manufacturing process by eliminating the use of a carrier sheet or web.
- the present asymmetrical backerboard comprises a low density, high compressive strength concrete core having an upper principal surface and a lower principal surface.
- the upper principal surface of the core is covered by a fiberglass mesh reinforcement layer, itself covered and bonded to the core by a thin layer of Portland cement.
- the core itself comprises a sufficient amount of randomly dispersed fiberglass fibers, the addition of the fiberglass mesh reinforcement layer may not be required.
- the lower principal surface of the backerboard is covered with a high tensile strength, impervious moisture barrier membrane.
- the present backerboard construction eliminates the prior art necessity of the on-the-construction-site application of a moisture barrier behind the backerboard. It exhibits all of the structural, bonding and workability properties of conventional backerboards, and provides advanced water resistance.
- the present method of constructing the backerboard dispenses with the prior art requirement of a carrier sheet or web.
- the panel is manufactured by the concurrent steps of running a continuous pervious reinforcement web through a web coating bath and then removing excess bath therefrom, and running a continuous impervious reinforcement web through a set of pinch rollers and atop a conveyor belt.
- Core material is dispensed upon the impervious web via a hopper, and the combination of impervious web and core material run through a screed. The core material is then compacted. The bathed pervious web is then fed onto the top of the core material, forming a sandwich of, from bottom to top, impervious web, core material and pervious web. The composite is then cut into panels.
- FIG. 1 is a front sectional view of a prior art backboard.
- FIG. 2 is a side view of FIG. 1.
- FIG. 3 is a front sectional view of the present asymmetrical backboard according to a preferred embodiment of the present invention.
- FIG. 4 is a side view of FIG. 3.
- FIG. 5 is a block diagram of a preferred construction method for the backerboard of FIG. 3.
- FIG. 6 illustrates the manufacture of the backerboard of FIG. 3.
- the term “pervious” defines a property of a material, that property enabling free water to penetrate through a material
- the term “impervious” defines a property of a material, that property being highly resistant against enabling free water to penetrate through a material.
- An impervious material may enable water vapor to penetrate through a material.
- FIGS. 1 and 2 illustrate a conventional backerboard 10 comprising a low density, high compressive strength, concrete core 12 .
- a layer of fiberglass mesh reinforcement 14 covers both major faces of the core 12 , with each of these pervious fiberglass layers themselves 14 covered with a thin layer 16 of Portland cement.
- the present invention 20 comprises a core 22 having an upper principal surface 24 and a lower principal surface 26 , an upper reinforcement material 28 in contact with the upper principal surface 24 of the core 22 , an upper coating 32 in communication with the upper principal surface 24 of the core 22 and the upper reinforcement material 28 , and an impervious membrane 34 covering the lower principal surface 26 of the core 22 .
- the core 22 can comprise low, medium and high slump concrete.
- the concrete preferably includes Portland cement and lightweight fillers and/or aggregates of, for example, expanded shale, expanded clay, sintered clay, pumice, slag, calcium carbonate, slate, diatomaceous slate, perlite, vermiculite, scoria, volcanic cinders, tuff, diatomite, sintered fly ash, industrial cinders, gypsum, foam beads, glass beads and the like.
- Other additives that can be mixed with the Portland cement include lightweight sand and alkaline resistant fibers such as chopped reinforcement fibers, randomly dispersed in the core 22 .
- the upper reinforcement material 28 is preferably pervious and comprises woven fiberglass mesh or fiberglass skrim with an alkaline resistant coating.
- the reinforcement material 28 can be a polymer fiber mat.
- the upper reinforcement material 28 can, in essence, be made a part of the core 22 , such that the addition of a separate layer of upper reinforcement material is not necessary.
- the core 22 can comprise a sufficient amount of alkaline resistant fibers wherein an upper reinforcement material layer need not be an additional element of the present backerboard 10 .
- the upper coating 32 can be a Portland cement slurry being either neat or foamed.
- the slurry can comprise fine aggregate and/or filler material.
- the impervious membrane 34 preferably comprises a polymer membrane, for example, a fiber mat, Tyvek®, Typar®, brand spunbonded olefin, or a layer of waterproofed paper or cardboard.
- the impervious membrane 34 can specifically include an alkaline resistant dense polymer fiber mat.
- the present manufacturing process 40 incorporates a first feeding step 72 of running a continuous roll 42 of the impervious membrane 34 out through a pinch roller assembly 44 .
- the impervious membrane 34 is at that point supported and conveyed by a conveyor belt 46 .
- a second depositing step 74 the membrane 34 is conveyed beneath a core material dispense hopper 48 , through which the cementitious core mix of the core 22 if fed onto the membrane 34 .
- Hopper 48 can include elements (not shown), for example, a metering gate for controlling the amount of mix laid onto the membrane 34 .
- a third screeding step 76 of the present manufacturing process includes reducing the thickness of the core mix.
- the conveyor belt 46 carries the membrane 34 /core mix composite through screed 52 to reduce the thickness, and smooth out the upper surface, of the core mix.
- the conveyor belt 46 moves the membrane 34 /core mix composite into a compaction station 54 that can include a compaction roll 56 that which serves to compact the core mix against the impervious membrane 34 . This compaction increases the density of the core and enhances the bond of the membrane 34 to the core mix.
- a roll of the upper reinforcement material 28 is run through a bath 58 of the upper coating 32 , and in a sixth layering step 84 , the upper reinforcement material 28 is laid down on the core mix.
- a roller assembly 62 can serve to draw the upper reinforcement material 28 through the bath 58 and a doctor assembly 64 can remove any excessive slurry from the material 28 .
- a drag bar 66 can be positioned above the material 28 which drags against its upper surface, thereby serving to urge core mix on the upper surface of the material 28 into the interstices of the material 28 and through the material 28 .
- the backerboard is then cut downstream (not shown) into panels.
- the present manufacturing process 40 has great advantages over the prior art processes.
- the conventional forming conveyor must be protected from contact with the bottom of the core/pervious (as opposed to the present invention's impervious membrane 34 ) surface while in its plastic state. This is accomplished by the use of a form, a carrier sheet or a disposable carrier web. These forms and carrier sheets are treated with a release agent and remain with the backerboard until it has hardened, at which time the form or carrier sheet is separated from the backerboard, cleaned and recoated with release agent to be reentered into the forming operation.
- the web is treated with a release agent and is dispensed onto the forming conveyer where the backerboard is formed on the carrier web. This web remains with the backerboard until it hardens at which time the carrier web is removed and disposed.
- the present invention avoids the carrier sheet problem by providing a backerboard with a cementitious surface on only one side, and a high tensile strength impervious membrane 34 on the other side. Manufacturing this improved backerboard with the membrane 34 on the bottom side eliminates the need for a form, a carrier sheet, a release agent or a carrier web.
- the manufacturing process thus is greatly simplified by ridding the process and equipment required to treat the carrier or form with release agent, dispensing the carrier or form into the forming process, separating the carrier or form from the backerboard, cleaning the carrier or form, retreating the carrier or form with release agent, and/or dispensing of and disposing of the carrier web. Additionally the cost of the impervious high tensile strength membrane 34 is approximately one-forth (1/4) of the cost of vinyl coated fiberglass mesh with comparable tensile strength.
Abstract
The present invention is a backerboard having a fiberglass mesh on one side, and a impervious reinforcement membrane on the other side. The backerboard incorporates a low density, high compressive strength concrete core having an upper principal surface and a lower principal surface. The upper principal surface of the core is covered by a fiberglass mesh reinforcement layer, itself covered and bonded to the core by a thin layer of Portland cement. The lower principal surface of the backerboard is covered with a high tensile strength, impervious reinforcement membrane.
Description
- 1. Field of the Invention
- This invention relates generally to a composite structural panel, and more particularly to an asymmetrical concrete backerboard having fiberglass mesh reinforcement on one side, and an impervious reinforcement membrane on the opposite side of the board.
- 2. Description of Related Art
- The conventional backerboard is made up of a rectangular panel of solid concrete, the concrete core, having both major surfaces covered with fiberglass. The fiberglass adds strength to the board, and provides only limited resistance to water penetration through the board. Concrete backerboards are used extensively in the construction of interior and exterior floors, walls and ceilings. The concrete backerboard is a superior substrate or underlayment for stucco, ceramic tile, marble, and other tile-like surfaces located in wet areas, such as shower walls and bathtub surrounds, and building exterior walls.
- Typically, the concrete core of the backerboard is a low density, high compressive strength, concrete core. The fiberglass mesh reinforcement layers overlay both major faces of the core, with each of these pervious fiberglass layers themselves covered with a thin layer of Portland cement. Backerboards have textured cementitious surfaces that provide for a high strength bond with mastics and Portland cement mortars that are used to adhere tile to the substrate in wet areas.
- While the conventional backerboard is generally stable and water resistant, it is not an ideal construction panel for use in wet environments due to several inherent limitations. For example, it is generally recommended by backerboard manufactures, and required by most building codes, to use an additional impervious moisture barrier behind the backerboard. Thus, contractors are forced to install the backerboard and separate moisture barrier in the field, at the construction site. Use of a impervious barrier membrane with the backerboard provides protection for the wood or steel structures under or behind the backerboard, and contains the moisture in the wet area. Examples of commonly used moisture barriers are felt paper, Tyvek®, spunbonded olefin and polyethylene.
- An exemplary patent in this field includes U.S. Pat. No. 3,284,980 to Dinkel disclosing a precast panel of cement and aggregate reinforced with a skin membrane of fibrous material. Backerboard manufacturing techniques include a lightweight aggregate core faced on each side or face with a fiberglass mesh material bathed in a slurry of neat cement and pressed against the aggregate core, such that when the neat cement and the aggregate core are cured, there is provided a composite, fiberglass mesh reinforced, cementitious panel. U.S. Reissue Pat. No. Re32,037 to Clear is a method for manufacturing cementitious reinforced panels and illustrates a concrete panel11 having
reinforcement layers 12, 13 and apolyethylene layer 20 adjacent one of thelayers 12, 13.Layers 12 and 13 are described as mesh reinforcing elements, preferably constituting fiber mesh like pervious webs, each entrained in hydraulic cement.Layer 20 is a carrier sheet placed under reinforcingelement 12 during manufacture. Yet, such methods of constructing backerboards are not only deficient because they produce an inferior wet-area panel, but also because they require the use of a carrier sheet. - It is evident from the prior art that an improved backerboard and method of constructing such an improved backerboard is needed. It can be seen that there is a need for a backerboard having at least one waterproof surface that can be delivered ready-made to the construction site, and a method for producing such a backerboard without resort to a carrier sheet.
- Briefly described, in a preferred form, the present invention is a backerboard having a fiberglass mesh on one side, and an impervious moisture barrier membrane on the other side. Such an asymmetrical backerboard design (the two major surfaces of the core having differing moisture-resistant layers, providing different moisture-resistant properties) incorporates numerous advantages over the conventional backerboard design, including having lower manufacture costs, having a waterproof panel deliverable on-site, and having a simplified manufacturing process by eliminating the use of a carrier sheet or web.
- The present asymmetrical backerboard comprises a low density, high compressive strength concrete core having an upper principal surface and a lower principal surface. The upper principal surface of the core is covered by a fiberglass mesh reinforcement layer, itself covered and bonded to the core by a thin layer of Portland cement. Alternatively, if the core itself comprises a sufficient amount of randomly dispersed fiberglass fibers, the addition of the fiberglass mesh reinforcement layer may not be required. The lower principal surface of the backerboard is covered with a high tensile strength, impervious moisture barrier membrane.
- The present backerboard construction eliminates the prior art necessity of the on-the-construction-site application of a moisture barrier behind the backerboard. It exhibits all of the structural, bonding and workability properties of conventional backerboards, and provides advanced water resistance.
- The present method of constructing the backerboard dispenses with the prior art requirement of a carrier sheet or web. In a preferred embodiment of the invention, the panel is manufactured by the concurrent steps of running a continuous pervious reinforcement web through a web coating bath and then removing excess bath therefrom, and running a continuous impervious reinforcement web through a set of pinch rollers and atop a conveyor belt.
- Core material is dispensed upon the impervious web via a hopper, and the combination of impervious web and core material run through a screed. The core material is then compacted. The bathed pervious web is then fed onto the top of the core material, forming a sandwich of, from bottom to top, impervious web, core material and pervious web. The composite is then cut into panels.
- It is thus an object of the present invention to provide an asymmetrical backerboard and a method for making such a board.
- Further, it is an object of the present invention to provide a construction panel having at least one major surface which is highly resistant to the penetration of water.
- These and other objects, features, and advantages of the present invention will become more apparent upon reading the following specification in conjunction with the accompanying drawing figures.
- FIG. 1 is a front sectional view of a prior art backboard.
- FIG. 2 is a side view of FIG. 1.
- FIG. 3 is a front sectional view of the present asymmetrical backboard according to a preferred embodiment of the present invention.
- FIG. 4 is a side view of FIG. 3.
- FIG. 5 is a block diagram of a preferred construction method for the backerboard of FIG. 3.
- FIG. 6 illustrates the manufacture of the backerboard of FIG. 3.
- The components of the present invention are referenced herein as follows:
NO. COMPONENT NO. COMPONENT 10 Prior Art Backerboard 48 Core Feed Hopper 12 Concrete Core 52 Screed 14 Fiberglass Mesh Reinforcement 54 Compaction Station 16 Layer of Portland Cement 56 Compaction Roll 20 Present Asymmetrical Backerboard 58 Bath 22 Concrete Core 62 Roller Assembly 24 Upper Principal Surface of Core 64 Doctor Assembly 26 Lower Principal Surface of Core 66 Drag Bar 28 Upper Reinforcement Material 72 Step of Feeding 32 Upper Coating 74 Step of Depositing 34 Impervious Membrane 76 Step of Screeding 40 Present Manufacturing Process 78 Step of Compacting 42 Roll of Impervious Membrane 82 Step of Bathing 44 Pinch Roller Assembly 84 Step of Layering 46 Conveyor Belt 86 Step of Cutting - It should be noted that as used herein the term “pervious” defines a property of a material, that property enabling free water to penetrate through a material, and that the term “impervious” defines a property of a material, that property being highly resistant against enabling free water to penetrate through a material. An impervious material may enable water vapor to penetrate through a material.
- Referring now in detail to the drawing figures, wherein like reference numerals represent like parts throughout the several views, FIGS. 1 and 2 illustrate a
conventional backerboard 10 comprising a low density, high compressive strength,concrete core 12. A layer offiberglass mesh reinforcement 14 covers both major faces of thecore 12, with each of these pervious fiberglass layers themselves 14 covered with athin layer 16 of Portland cement. - As shown in FIGS. 3 and 4, The
present invention 20 comprises acore 22 having an upperprincipal surface 24 and alower principal surface 26, anupper reinforcement material 28 in contact with theupper principal surface 24 of thecore 22, anupper coating 32 in communication with the upperprincipal surface 24 of thecore 22 and theupper reinforcement material 28, and animpervious membrane 34 covering the lowerprincipal surface 26 of thecore 22. - The
core 22 can comprise low, medium and high slump concrete. The concrete preferably includes Portland cement and lightweight fillers and/or aggregates of, for example, expanded shale, expanded clay, sintered clay, pumice, slag, calcium carbonate, slate, diatomaceous slate, perlite, vermiculite, scoria, volcanic cinders, tuff, diatomite, sintered fly ash, industrial cinders, gypsum, foam beads, glass beads and the like. Other additives that can be mixed with the Portland cement include lightweight sand and alkaline resistant fibers such as chopped reinforcement fibers, randomly dispersed in thecore 22. - The
upper reinforcement material 28 is preferably pervious and comprises woven fiberglass mesh or fiberglass skrim with an alkaline resistant coating. Alternatively, thereinforcement material 28 can be a polymer fiber mat. In yet another embodiment, theupper reinforcement material 28 can, in essence, be made a part of the core 22, such that the addition of a separate layer of upper reinforcement material is not necessary. For example, the core 22 can comprise a sufficient amount of alkaline resistant fibers wherein an upper reinforcement material layer need not be an additional element of thepresent backerboard 10. - The
upper coating 32 can be a Portland cement slurry being either neat or foamed. The slurry can comprise fine aggregate and/or filler material. - The
impervious membrane 34 preferably comprises a polymer membrane, for example, a fiber mat, Tyvek®, Typar®, brand spunbonded olefin, or a layer of waterproofed paper or cardboard. Theimpervious membrane 34 can specifically include an alkaline resistant dense polymer fiber mat. - Manufacture
- The present manufacturing process40 (as shown left to right in FIGS. 5 and 6) incorporates a
first feeding step 72 of running acontinuous roll 42 of theimpervious membrane 34 out through apinch roller assembly 44. Theimpervious membrane 34 is at that point supported and conveyed by aconveyor belt 46. - In a
second depositing step 74, themembrane 34 is conveyed beneath a core material dispensehopper 48, through which the cementitious core mix of the core 22 if fed onto themembrane 34.Hopper 48 can include elements (not shown), for example, a metering gate for controlling the amount of mix laid onto themembrane 34. - A
third screeding step 76 of the present manufacturing process includes reducing the thickness of the core mix. Theconveyor belt 46 carries themembrane 34/core mix composite throughscreed 52 to reduce the thickness, and smooth out the upper surface, of the core mix. Thereafter, in afourth compacting step 78, theconveyor belt 46 moves themembrane 34/core mix composite into acompaction station 54 that can include acompaction roll 56 that which serves to compact the core mix against theimpervious membrane 34. This compaction increases the density of the core and enhances the bond of themembrane 34 to the core mix. - In a
fifth bathing step 82, a roll of theupper reinforcement material 28 is run through abath 58 of theupper coating 32, and in asixth layering step 84, theupper reinforcement material 28 is laid down on the core mix. Aroller assembly 62 can serve to draw theupper reinforcement material 28 through thebath 58 and adoctor assembly 64 can remove any excessive slurry from thematerial 28. Adrag bar 66 can be positioned above thematerial 28 which drags against its upper surface, thereby serving to urge core mix on the upper surface of the material 28 into the interstices of thematerial 28 and through thematerial 28. In afinal cutting step 86, the backerboard is then cut downstream (not shown) into panels. - The
present manufacturing process 40 has great advantages over the prior art processes. During the manufacture of the standard concrete backerboard, with cementitious surfaces on both sides, the conventional forming conveyor must be protected from contact with the bottom of the core/pervious (as opposed to the present invention's impervious membrane 34) surface while in its plastic state. This is accomplished by the use of a form, a carrier sheet or a disposable carrier web. These forms and carrier sheets are treated with a release agent and remain with the backerboard until it has hardened, at which time the form or carrier sheet is separated from the backerboard, cleaned and recoated with release agent to be reentered into the forming operation. In the case of manufacturing with a carrier web, the web is treated with a release agent and is dispensed onto the forming conveyer where the backerboard is formed on the carrier web. This web remains with the backerboard until it hardens at which time the carrier web is removed and disposed. - The present invention avoids the carrier sheet problem by providing a backerboard with a cementitious surface on only one side, and a high tensile strength
impervious membrane 34 on the other side. Manufacturing this improved backerboard with themembrane 34 on the bottom side eliminates the need for a form, a carrier sheet, a release agent or a carrier web. Theimpervious membrane 34 which is incorporated into the present backerboard composite, essentially becomes a non-disposable carrier web. The manufacturing process thus is greatly simplified by ridding the process and equipment required to treat the carrier or form with release agent, dispensing the carrier or form into the forming process, separating the carrier or form from the backerboard, cleaning the carrier or form, retreating the carrier or form with release agent, and/or dispensing of and disposing of the carrier web. Additionally the cost of the impervious hightensile strength membrane 34 is approximately one-forth (1/4) of the cost of vinyl coated fiberglass mesh with comparable tensile strength. - While the invention has been disclosed in its preferred forms, it will be apparent to those skilled in the art that many modifications, additions, and deletions can be made therein without departing from the spirit and scope of the invention and its equivalents as set forth in the following claims.
Claims (35)
1. A construction element for use as an underlayment or backerboard comprising:
(a) a core having an upper principal surface and a lower principal surface; and
(b) an impervious membrane on the lower principal surface of the core;
the core including alkaline resistant fibers.
2. The construction element of claim 1 , the alkaline resistant fibers being chopped reinforcement fibers randomly dispersed in the core.
3. The construction element of claim 2 , the impervious membrane comprising a reinforced polymer membrane.
4. The construction element of claim 2 , the impervious membrane comprising waterproof paperboard.
5. The construction element of claim 2 , the impervious membrane comprising spunbonded olefin.
6. The construction element of claim 2 , the impervious membrane comprising an alkaline resistant dense polymer fiber mat.
7. The construction element of claim 2 , the cement core comprising Portland cement and an additive selected from the group consisting of expanded shale, expanded clay, sintered clay, pumice, slag, calcium carbonate, slate, diatomaceous slate, perlite, vermiculite, scoria, volcanic cinders, tuff, diatomite, sintered fly ash, industrial cinders, gypsum, foam beads and glass beads.
8. A construction element for use as an underlayment or backerboard comprising:
(a) a core having an upper principal surface and a lower principal surface;
(b) a pervious upper reinforcement material on the upper principal surface of the core;
(c) an upper coating in communication with the upper principal surface of the core and the pervious upper reinforcement material; and
(d) an impervious membrane on the lower principal surface of the core.
9. The construction element of claim 8 , the impervious membrane comprising a reinforced polymer membrane.
10. The construction element of claim 8 , the impervious membrane comprising waterproof paperboard.
11. The construction element of claim 8 , the impervious membrane comprising spunbonded olefin.
12. The construction element of claim 8 , the impervious membrane comprising an alkaline resistant dense polymer fiber mat.
13. The construction element of claim 8 , the cement core comprising Portland cement and an additive selected from the group consisting of expanded shale, expanded clay, sintered clay, pumice, slag, calcium carbonate, slate, diatomaceous slate, perlite, vermiculite, scoria, volcanic cinders, tuff, diatomite, sintered fly ash, industrial cinders, gypsum, foam beads and glass beads.
14. A construction element for use as an underlayment or backerboard comprising:
(a) a cement core having an upper principal surface and a lower principal surface;
(b) a pervious reinforcement layer on the upper principal surface of the core;
(c) a cement slurry binding the reinforcement layer to the upper principal surface of the core; and
(d) a high tensile strength, impervious moisture barrier membrane bound to the lower principal surface of the core.
15. The construction element of claim 14 , the cement core comprising Portland cement and an additive selected from the group consisting of expanded shale, expanded clay, sintered clay, pumice, slag, calcium carbonate, slate, diatomaceous slate, perlite, vermiculite, scoria, volcanic cinders, tuff, diatomite, sintered fly ash, industrial cinders, gypsum, foam beads and glass beads.
16. The construction element of claim 14 , the core comprising Portland cement and alkaline resistant fibers.
17. The construction element of claim 16 , the alkaline resistant fibers being chopped reinforcement fibers randomly dispersed in the core.
18. The construction element of claim 14 , the pervious reinforcement layer comprising a fiberglass mesh with an alkaline resistant coating, the fiberglass mesh of the pervious reinforcement layer selected from the group consisting of woven fiberglass and fiberglass skrim.
19. The construction element of claim 14 , the impervious moisture barrier membrane comprising an alkaline resistant dense polymer fiber mat.
20. A method of manufacturing a construction element for use as an underlayment or backerboard comprising the following steps:
(a) conveying a sheet of impervious reinforced membrane through a core station; and
(b) depositing at the core station a core material on the impervious reinforced membrane;
the core material including alkaline resistant fibers;
the impervious reinforced membrane acting as a carrier sheet.
21. The method of manufacturing according to claim 20 , the alkaline resistant fibers being chopped reinforcement fibers randomly dispersed in the core.
22. The method of manufacturing according to claim 21 , the impervious reinforced membrane comprising a reinforced polymer membrane.
23. The method of manufacturing according to claim 21 , the impervious reinforced membrane comprising waterproof paperboard.
24. The method of manufacturing according to claim 21 , the impervious reinforced membrane comprising spunbonded olefin.
25. The method of manufacturing according to claim 21 , the impervious reinforced membrane comprising an alkaline resistant dense polymer fiber mat.
26. A method of manufacturing a construction element for use as an underlayment or backerboard comprising the following steps:
(a) conveying a sheet of impervious reinforced membrane through a core station;
(b) depositing at the core station a core material on the impervious reinforced membrane; and
(c) layering a pervious membrane atop the core material such that the core material is sandwiched between the pervious membrane and the impervious membrane
the impervious reinforced membrane acting as a carrier sheet throughout the manufacturing process.
27. The method of manufacturing according to claim 26 , further comprising the step of screeding the core material to reduce the thickness of the core material on the impervious reinforced material.
28. The method of manufacturing according to claim 27 , said step of screeding smoothing out an upper surface of the core material.
29. The method of manufacturing according to claim 26 , further comprising the step of compacting the core material on the impervious reinforced membrane.
30. The method of manufacturing according to claim 26 , further comprising the step of bathing the pervious membrane in a binding agent prior to layering the pervious membrane on the core material.
31. The method of manufacturing according to claim 26 , further comprising the step of cutting the construction element into panels.
32. The method of manufacturing according to claim 26 , the impervious reinforced membrane comprising a reinforced polymer membrane.
33. The method of manufacturing according to claim 26 , the impervious reinforced membrane comprising waterproof paperboard.
34. The method of manufacturing according to claim 26 , the impervious reinforced membrane comprising Tyvek®.
35. A method of manufacturing a construction element for use as an underlayment or backerboard comprising the following steps:
(a) conveying a sheet of impervious reinforced membrane through the steps of the method of manufacturing;
(b) depositing a core material from a core material hopper to the conveyed impervious reinforced membrane; and
(c) screeding the core material on the conveyed sheet of impervious reinforced membrane with a screed;
(d) compacting the core material on the conveyed sheet of impervious reinforced membrane with a compactor;
(e) bathing a conveyed pervious reinforced membrane through a bath of cement; and
(f) layering the pervious reinforced membrane on the core material on the conveyed sheet of impervious reinforced membrane; and
(g) cutting the manufactured construction element into panels.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/829,256 US20020170648A1 (en) | 2001-04-09 | 2001-04-09 | Asymmetrical concrete backerboard and method for making same |
US12/710,109 US8413333B2 (en) | 2001-04-09 | 2010-02-22 | Method for making an asymmetrical concrete backerboard |
US13/859,534 US20130231019A1 (en) | 2001-04-09 | 2013-04-09 | Asymmetrical Concrete Backerboard |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/829,256 US20020170648A1 (en) | 2001-04-09 | 2001-04-09 | Asymmetrical concrete backerboard and method for making same |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/710,109 Division US8413333B2 (en) | 2001-04-09 | 2010-02-22 | Method for making an asymmetrical concrete backerboard |
Publications (1)
Publication Number | Publication Date |
---|---|
US20020170648A1 true US20020170648A1 (en) | 2002-11-21 |
Family
ID=25253981
Family Applications (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/829,256 Abandoned US20020170648A1 (en) | 2001-04-09 | 2001-04-09 | Asymmetrical concrete backerboard and method for making same |
US12/710,109 Expired - Fee Related US8413333B2 (en) | 2001-04-09 | 2010-02-22 | Method for making an asymmetrical concrete backerboard |
US13/859,534 Abandoned US20130231019A1 (en) | 2001-04-09 | 2013-04-09 | Asymmetrical Concrete Backerboard |
Family Applications After (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/710,109 Expired - Fee Related US8413333B2 (en) | 2001-04-09 | 2010-02-22 | Method for making an asymmetrical concrete backerboard |
US13/859,534 Abandoned US20130231019A1 (en) | 2001-04-09 | 2013-04-09 | Asymmetrical Concrete Backerboard |
Country Status (1)
Country | Link |
---|---|
US (3) | US20020170648A1 (en) |
Cited By (24)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20030032351A1 (en) * | 1998-09-08 | 2003-02-13 | Horner Charles J. | Foamed facer and insulation boards made therefrom |
US20040025465A1 (en) * | 2002-07-30 | 2004-02-12 | Corina-Maria Aldea | Inorganic matrix-fabric system and method |
US20040048110A1 (en) * | 2002-09-09 | 2004-03-11 | Steven Butler | Wallboard comprising an improved multi-layer facing material and a method for making the same |
US20050009428A1 (en) * | 2003-07-09 | 2005-01-13 | Saint Gobain Technical Fabrics | Fabric reinforcement and cementitious boards faced with same |
US20050136758A1 (en) * | 2003-12-19 | 2005-06-23 | Saint Gobain Technical Fabrics | Enhanced thickness fabric and method of making same |
EP1686220A1 (en) | 2005-01-28 | 2006-08-02 | Xella Trockenbau-Systeme GmbH | Lightweight construction panel |
US20070261365A1 (en) * | 2006-04-24 | 2007-11-15 | James Keene | Building facade construction system and methods therefor |
US20100065542A1 (en) * | 2008-09-16 | 2010-03-18 | Ashish Dubey | Electrical heater with a resistive neutral plane |
US20100126110A1 (en) * | 2008-11-21 | 2010-05-27 | Maxxon Corporation | Installing underlayment systems |
US20100151757A1 (en) * | 2008-12-16 | 2010-06-17 | Saint-Gobain Technical Fabrics America, Inc. | Polyolefin coated fabric reinforcement and cementitious boards reinforced with same |
US7846278B2 (en) | 2000-01-05 | 2010-12-07 | Saint-Gobain Technical Fabrics America, Inc. | Methods of making smooth reinforced cementitious boards |
US20110197528A1 (en) * | 2010-02-15 | 2011-08-18 | Construction Research & Technology Gmbh | Exterior Finish System |
EP2381179A1 (en) | 2010-04-20 | 2011-10-26 | Fermacell GmbH | Plant raising table |
US8146310B2 (en) | 2009-03-11 | 2012-04-03 | Keene Building Products Co., Inc. | Noise control flooring system |
WO2012177228A2 (en) | 2011-06-21 | 2012-12-27 | Ti̇cem İleri̇ Yapi Teknoloji̇leri̇ Sanayi̇ Ti̇caret Danişmanlik Li̇mi̇ted Şi̇rketi̇ | System and method for producing thin cement-based panels having high strength, durability and production rate |
US8528286B2 (en) | 2009-11-10 | 2013-09-10 | Keene Building Products Co., Inc. | Sound control mat |
US8647734B2 (en) | 2011-01-17 | 2014-02-11 | Keene Building Products Co., Inc. | Drainage mat |
US8734932B2 (en) | 2011-01-17 | 2014-05-27 | Keene Building Products Co., Inc. | Drainage mat |
US9481768B1 (en) | 2013-03-15 | 2016-11-01 | Revolutionary Plastics, Llc | Method of mixing to form composition |
US9970192B2 (en) * | 2016-03-28 | 2018-05-15 | Bay Design, Inc. | Multifunctional panel system and attachment means |
CN108930388A (en) * | 2018-08-29 | 2018-12-04 | 江西远洋威利实业有限公司 | A kind of technique using trade waste flyash production graphene heating board |
WO2019126149A1 (en) * | 2017-12-19 | 2019-06-27 | Saint-Gobain Adfors Canada, Ltd. | A reinforcing layer, a cementitious board, and method of forming the cementitious board |
US10336036B2 (en) | 2013-03-15 | 2019-07-02 | United States Gypsum Company | Cementitious article comprising hydrophobic finish |
US11685965B2 (en) * | 2015-04-03 | 2023-06-27 | Metallo Belgium | Construction elements with slag from non-ferrous metal production |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2020029136A1 (en) * | 2018-08-08 | 2020-02-13 | 郑州三迪建筑科技有限公司 | Mesh gypsum board |
Citations (52)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1470260A (en) * | 1921-08-15 | 1923-10-09 | Joseph W Emerson | Hardened water-repellent gypsum plaster and method for producing the same |
US1474657A (en) * | 1922-08-14 | 1923-11-20 | Frank A Maslen | Plaster board |
US1497261A (en) * | 1921-11-19 | 1924-06-10 | Joseph W Emerson | Waterproof plaster board |
US1805840A (en) * | 1930-01-20 | 1931-05-19 | American Gypsum Co | Reenforced and protected wall board edge |
US2475781A (en) * | 1943-11-15 | 1949-07-12 | Ruberoid Co | Method of making construction material |
US2803575A (en) * | 1953-08-17 | 1957-08-20 | Kaiser Gypsum Company Inc | Gypsum board |
US2894857A (en) * | 1954-02-05 | 1959-07-14 | Phillips Petroleum Co | Process of applying resinous waterproof coating to multivalent metal ion-containing surfaces and resultant article |
US2895432A (en) * | 1954-09-10 | 1959-07-21 | American Steel Band Company | Roofing material |
US3307306A (en) * | 1961-07-28 | 1967-03-07 | Adsure Inc | Insulation blanket structure |
US3345246A (en) * | 1964-07-13 | 1967-10-03 | Dow Chemical Co | Leveling base sheet for reroofing |
US3462339A (en) * | 1966-03-15 | 1969-08-19 | Koppers Co Inc | Fire-retardant panel construction |
US3466222A (en) * | 1967-07-26 | 1969-09-09 | Lexsuco Inc | Fire retardant insulative structure and roof deck construction comprising the same |
US3672951A (en) * | 1970-03-17 | 1972-06-27 | Dow Chemical Co | Roofing structure and method |
US3709733A (en) * | 1970-06-26 | 1973-01-09 | Craig Syst Corp | Composite panel structure having mounting inserts therein |
US3887952A (en) * | 1973-12-03 | 1975-06-10 | Jr Frank S Nicoll | Modular constructed fiberglass reinforced paperboard boat |
US3892899A (en) * | 1973-07-19 | 1975-07-01 | Paul P Klein | Roof construction |
US3934066A (en) * | 1973-07-18 | 1976-01-20 | W. R. Grace & Co. | Fire-resistant intumescent laminates |
US3971184A (en) * | 1975-03-05 | 1976-07-27 | Robert M. Barlow | Insulated, water impermeable roofing system |
US4015386A (en) * | 1975-02-07 | 1977-04-05 | Clark Door Company, Inc. | Fire-retardant low temperature insulating building panel |
US4122203A (en) * | 1978-01-09 | 1978-10-24 | Stahl Joel S | Fire protective thermal barriers for foam plastics |
US4125664A (en) * | 1974-07-13 | 1978-11-14 | Herbert Giesemann | Shaped articles of foam plastics |
US4131703A (en) * | 1978-02-17 | 1978-12-26 | Dayco Corporation | Fire-resistant construction, method of making same, and carpet construction employing same |
US4303722A (en) * | 1979-06-08 | 1981-12-01 | Pilgrim Thomas A | Building components |
US4413995A (en) * | 1982-05-21 | 1983-11-08 | Personal Products Company | Absorbent panel suitable for use in absorbent products |
US4420295A (en) * | 1979-09-26 | 1983-12-13 | Clear Theodore E | Apparatus for manufacturing cementitious reinforced panels |
US4450022A (en) * | 1982-06-01 | 1984-05-22 | United States Gypsum Company | Method and apparatus for making reinforced cement board |
US4528238A (en) * | 1983-01-19 | 1985-07-09 | Imperial Chemical Industries Plc | Production of fibre-reinforced cementitious composition |
US4530877A (en) * | 1981-10-22 | 1985-07-23 | Cyclops Corporation | Fire resistant foam insulated building panels |
US4617219A (en) * | 1984-12-24 | 1986-10-14 | Morris Schupack | Three dimensionally reinforced fabric concrete |
US4722866A (en) * | 1985-04-09 | 1988-02-02 | Georgia-Pacific Corporation | Fire resistant gypsum board |
US4785137A (en) * | 1984-04-30 | 1988-11-15 | Allied Corporation | Novel nickel/indium/other metal alloy for use in the manufacture of electrical contact areas of electrical devices |
US4801496A (en) * | 1986-06-24 | 1989-01-31 | The Boeing Company | Composite member with integrated thermal protection |
US4828635A (en) * | 1988-04-13 | 1989-05-09 | Les Produits Isolofoam Inc. | Laminated, thermal insulation panel |
US4841705A (en) * | 1987-04-13 | 1989-06-27 | 698315 Ontario, Ltd. | Reinforced cementitious panel |
US4882888A (en) * | 1988-11-14 | 1989-11-28 | Dryvit System, Inc. | Laminated wall construction |
US4948647A (en) * | 1989-02-13 | 1990-08-14 | National Gypsum Company | Gypsum backer board |
US5030502A (en) * | 1990-02-02 | 1991-07-09 | Teare John W | Cementitious construction panel |
US5067298A (en) * | 1990-06-28 | 1991-11-26 | The Dow Chemical Company | Method for plaza deck construction |
US5224315A (en) * | 1987-04-27 | 1993-07-06 | Winter Amos G Iv | Prefabricated building panel having an insect and fungicide deterrent therein |
US5345738A (en) * | 1991-03-22 | 1994-09-13 | Weyerhaeuser Company | Multi-functional exterior structural foam sheathing panel |
US5350554A (en) * | 1991-02-01 | 1994-09-27 | Glascrete, Inc. | Method for production of reinforced cementitious panels |
US5704179A (en) * | 1984-02-27 | 1998-01-06 | Georgia-Pacific Corporation | Finishing and roof deck systems containing fibrous mat-faced gypsum boards |
US5714032A (en) * | 1993-07-12 | 1998-02-03 | Bpb Industries Public Limited Company | Method of manufacturing multilayer plasterboard and apparatus therefor |
US5784845A (en) * | 1995-04-06 | 1998-07-28 | The Dow Chemical Company | Open-cell foams in roofing systems |
US5791109A (en) * | 1984-02-27 | 1998-08-11 | Georgia-Pacific Corporation | Gypsum board and finishing system containing same |
US5961900A (en) * | 1992-10-10 | 1999-10-05 | Wedi; Helmut | Method of manufacturing composite board |
US6167668B1 (en) * | 1999-01-08 | 2001-01-02 | Laticrete International, Inc. | Finished flooring underlayment and method of making same |
US6171680B1 (en) * | 1998-06-19 | 2001-01-09 | K2, Inc. | Composite sheathing material having high water vapor permeability |
US6182407B1 (en) * | 1998-12-24 | 2001-02-06 | Johns Manville International, Inc. | Gypsum board/intumescent material fire barrier wall |
US6316087B1 (en) * | 1997-09-18 | 2001-11-13 | Warren Lehan | Synthetic structural panel and method for manufacture |
US6460304B1 (en) * | 1999-04-07 | 2002-10-08 | Choong-Yup Kim | Waterproofing structure and construction method therefor |
US6931809B1 (en) * | 1997-12-23 | 2005-08-23 | Rohm And Haas Company | Laminated wall structure |
Family Cites Families (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2899349A (en) * | 1959-08-11 | Method for bonding liner materials | ||
US3284980A (en) | 1964-07-15 | 1966-11-15 | Paul E Dinkel | Hydraulic cement panel with low density core and fiber reinforced high density surface layers |
US3613228A (en) * | 1969-07-02 | 1971-10-19 | Ibm | Manufacture of multielement magnetic head assemblies |
BE786217A (en) * | 1971-07-14 | 1973-01-15 | Dow Chemical Co | ROOF ELEMENT AND ITS MANUFACTURING PROCESS |
US3918230A (en) * | 1974-10-18 | 1975-11-11 | Decks Inc | Building deck construction |
CA1056178A (en) | 1976-01-19 | 1979-06-12 | Morris Schupack | Reinforced panel structures and methods for producing them |
USRE32037E (en) | 1978-03-16 | 1985-11-26 | Methods for manufacturing cementitious reinforced panels | |
US4356678A (en) | 1978-12-22 | 1982-11-02 | United Technologies Corporation | Composite structure |
JPS55126443A (en) | 1979-03-23 | 1980-09-30 | Mitsuo Koji | Water repelling body |
JPS55133950A (en) | 1979-04-06 | 1980-10-18 | Mitsuo Koji | Mold material |
JPS5843356B2 (en) | 1979-07-26 | 1983-09-26 | 住友セメント株式会社 | Manufacturing method of multilayer cured body |
JPS5835956A (en) | 1981-08-28 | 1983-03-02 | Hitachi Ltd | Hybrid integrated circuit device |
US4379192A (en) | 1982-06-23 | 1983-04-05 | Kimberly-Clark Corporation | Impervious absorbent barrier fabric embodying films and fibrous webs |
US4712349A (en) * | 1984-12-24 | 1987-12-15 | The Dow Chemical Company | Protected membrane roof system for high traffic roof areas |
US4669246A (en) * | 1985-02-15 | 1987-06-02 | The Dow Chemical Company | Insulated roofing system with water repellent fabric |
JPS6223742A (en) | 1985-07-17 | 1987-01-31 | 小林 千代吉 | Refractory gypsum board |
JPS62238734A (en) | 1986-04-10 | 1987-10-19 | 川崎製鉄株式会社 | Fiber-reinforced light-weight cement cured body |
CA2211984C (en) * | 1997-09-12 | 2002-11-05 | Marc-Andre Mathieu | Cementitious panel with reinforced edges |
CA2396362A1 (en) * | 2000-01-05 | 2001-07-12 | Saint-Gobain Technical Fabrics Of America, Inc. | Smooth reinforced cementitious boards and methods of making same |
US6581348B2 (en) * | 2001-06-15 | 2003-06-24 | John P. Hunter, Jr. | Seamless foam panel roofing system |
US8484922B2 (en) * | 2010-02-17 | 2013-07-16 | Sealed Air Corporation (Us) | Alkaline and heat resistant foam composite and floor underlayment |
-
2001
- 2001-04-09 US US09/829,256 patent/US20020170648A1/en not_active Abandoned
-
2010
- 2010-02-22 US US12/710,109 patent/US8413333B2/en not_active Expired - Fee Related
-
2013
- 2013-04-09 US US13/859,534 patent/US20130231019A1/en not_active Abandoned
Patent Citations (53)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1470260A (en) * | 1921-08-15 | 1923-10-09 | Joseph W Emerson | Hardened water-repellent gypsum plaster and method for producing the same |
US1497261A (en) * | 1921-11-19 | 1924-06-10 | Joseph W Emerson | Waterproof plaster board |
US1474657A (en) * | 1922-08-14 | 1923-11-20 | Frank A Maslen | Plaster board |
US1805840A (en) * | 1930-01-20 | 1931-05-19 | American Gypsum Co | Reenforced and protected wall board edge |
US2475781A (en) * | 1943-11-15 | 1949-07-12 | Ruberoid Co | Method of making construction material |
US2803575A (en) * | 1953-08-17 | 1957-08-20 | Kaiser Gypsum Company Inc | Gypsum board |
US2894857A (en) * | 1954-02-05 | 1959-07-14 | Phillips Petroleum Co | Process of applying resinous waterproof coating to multivalent metal ion-containing surfaces and resultant article |
US2895432A (en) * | 1954-09-10 | 1959-07-21 | American Steel Band Company | Roofing material |
US3307306A (en) * | 1961-07-28 | 1967-03-07 | Adsure Inc | Insulation blanket structure |
US3345246A (en) * | 1964-07-13 | 1967-10-03 | Dow Chemical Co | Leveling base sheet for reroofing |
US3462339A (en) * | 1966-03-15 | 1969-08-19 | Koppers Co Inc | Fire-retardant panel construction |
US3466222A (en) * | 1967-07-26 | 1969-09-09 | Lexsuco Inc | Fire retardant insulative structure and roof deck construction comprising the same |
US3672951A (en) * | 1970-03-17 | 1972-06-27 | Dow Chemical Co | Roofing structure and method |
US3709733A (en) * | 1970-06-26 | 1973-01-09 | Craig Syst Corp | Composite panel structure having mounting inserts therein |
US3934066A (en) * | 1973-07-18 | 1976-01-20 | W. R. Grace & Co. | Fire-resistant intumescent laminates |
US3892899A (en) * | 1973-07-19 | 1975-07-01 | Paul P Klein | Roof construction |
US3887952A (en) * | 1973-12-03 | 1975-06-10 | Jr Frank S Nicoll | Modular constructed fiberglass reinforced paperboard boat |
US4125664A (en) * | 1974-07-13 | 1978-11-14 | Herbert Giesemann | Shaped articles of foam plastics |
US4015386A (en) * | 1975-02-07 | 1977-04-05 | Clark Door Company, Inc. | Fire-retardant low temperature insulating building panel |
US3971184A (en) * | 1975-03-05 | 1976-07-27 | Robert M. Barlow | Insulated, water impermeable roofing system |
US4122203A (en) * | 1978-01-09 | 1978-10-24 | Stahl Joel S | Fire protective thermal barriers for foam plastics |
US4131703A (en) * | 1978-02-17 | 1978-12-26 | Dayco Corporation | Fire-resistant construction, method of making same, and carpet construction employing same |
US4303722A (en) * | 1979-06-08 | 1981-12-01 | Pilgrim Thomas A | Building components |
US4420295A (en) * | 1979-09-26 | 1983-12-13 | Clear Theodore E | Apparatus for manufacturing cementitious reinforced panels |
US4530877A (en) * | 1981-10-22 | 1985-07-23 | Cyclops Corporation | Fire resistant foam insulated building panels |
US4413995A (en) * | 1982-05-21 | 1983-11-08 | Personal Products Company | Absorbent panel suitable for use in absorbent products |
US4450022A (en) * | 1982-06-01 | 1984-05-22 | United States Gypsum Company | Method and apparatus for making reinforced cement board |
US4528238A (en) * | 1983-01-19 | 1985-07-09 | Imperial Chemical Industries Plc | Production of fibre-reinforced cementitious composition |
US5704179A (en) * | 1984-02-27 | 1998-01-06 | Georgia-Pacific Corporation | Finishing and roof deck systems containing fibrous mat-faced gypsum boards |
US5791109A (en) * | 1984-02-27 | 1998-08-11 | Georgia-Pacific Corporation | Gypsum board and finishing system containing same |
US4785137A (en) * | 1984-04-30 | 1988-11-15 | Allied Corporation | Novel nickel/indium/other metal alloy for use in the manufacture of electrical contact areas of electrical devices |
US4617219A (en) * | 1984-12-24 | 1986-10-14 | Morris Schupack | Three dimensionally reinforced fabric concrete |
US4722866A (en) * | 1985-04-09 | 1988-02-02 | Georgia-Pacific Corporation | Fire resistant gypsum board |
US4801496A (en) * | 1986-06-24 | 1989-01-31 | The Boeing Company | Composite member with integrated thermal protection |
US4841705A (en) * | 1987-04-13 | 1989-06-27 | 698315 Ontario, Ltd. | Reinforced cementitious panel |
US5224315A (en) * | 1987-04-27 | 1993-07-06 | Winter Amos G Iv | Prefabricated building panel having an insect and fungicide deterrent therein |
US4828635A (en) * | 1988-04-13 | 1989-05-09 | Les Produits Isolofoam Inc. | Laminated, thermal insulation panel |
US4882888A (en) * | 1988-11-14 | 1989-11-28 | Dryvit System, Inc. | Laminated wall construction |
US4948647A (en) * | 1989-02-13 | 1990-08-14 | National Gypsum Company | Gypsum backer board |
US5030502A (en) * | 1990-02-02 | 1991-07-09 | Teare John W | Cementitious construction panel |
US5030502B1 (en) * | 1990-02-02 | 1992-09-15 | W Teare John | |
US5067298A (en) * | 1990-06-28 | 1991-11-26 | The Dow Chemical Company | Method for plaza deck construction |
US5350554A (en) * | 1991-02-01 | 1994-09-27 | Glascrete, Inc. | Method for production of reinforced cementitious panels |
US5345738A (en) * | 1991-03-22 | 1994-09-13 | Weyerhaeuser Company | Multi-functional exterior structural foam sheathing panel |
US5961900A (en) * | 1992-10-10 | 1999-10-05 | Wedi; Helmut | Method of manufacturing composite board |
US5714032A (en) * | 1993-07-12 | 1998-02-03 | Bpb Industries Public Limited Company | Method of manufacturing multilayer plasterboard and apparatus therefor |
US5784845A (en) * | 1995-04-06 | 1998-07-28 | The Dow Chemical Company | Open-cell foams in roofing systems |
US6316087B1 (en) * | 1997-09-18 | 2001-11-13 | Warren Lehan | Synthetic structural panel and method for manufacture |
US6931809B1 (en) * | 1997-12-23 | 2005-08-23 | Rohm And Haas Company | Laminated wall structure |
US6171680B1 (en) * | 1998-06-19 | 2001-01-09 | K2, Inc. | Composite sheathing material having high water vapor permeability |
US6182407B1 (en) * | 1998-12-24 | 2001-02-06 | Johns Manville International, Inc. | Gypsum board/intumescent material fire barrier wall |
US6167668B1 (en) * | 1999-01-08 | 2001-01-02 | Laticrete International, Inc. | Finished flooring underlayment and method of making same |
US6460304B1 (en) * | 1999-04-07 | 2002-10-08 | Choong-Yup Kim | Waterproofing structure and construction method therefor |
Cited By (50)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20030032351A1 (en) * | 1998-09-08 | 2003-02-13 | Horner Charles J. | Foamed facer and insulation boards made therefrom |
US6774071B2 (en) * | 1998-09-08 | 2004-08-10 | Building Materials Investment Corporation | Foamed facer and insulation boards made therefrom |
US9017495B2 (en) | 2000-01-05 | 2015-04-28 | Saint-Gobain Adfors Canada, Ltd. | Methods of making smooth reinforced cementitious boards |
US7846278B2 (en) | 2000-01-05 | 2010-12-07 | Saint-Gobain Technical Fabrics America, Inc. | Methods of making smooth reinforced cementitious boards |
US20100147449A1 (en) * | 2002-07-30 | 2010-06-17 | Saint-Gobain Technical Fabrics Canada, Ltd. | Inorganic matrix-fabric system and method |
US20040025465A1 (en) * | 2002-07-30 | 2004-02-12 | Corina-Maria Aldea | Inorganic matrix-fabric system and method |
US20050139308A1 (en) * | 2002-07-30 | 2005-06-30 | Corina-Maria Aldea | Inorganic matrix-fabric system and method |
US20040048110A1 (en) * | 2002-09-09 | 2004-03-11 | Steven Butler | Wallboard comprising an improved multi-layer facing material and a method for making the same |
US7615178B2 (en) | 2003-07-09 | 2009-11-10 | Saint Gobain Technical Fabrics America, Inc. | Fabric reinforcement and cementitious boards faced with same |
US7354876B2 (en) | 2003-07-09 | 2008-04-08 | Saint-Gobain Technical Fabrics Canada Ltd. | Fabric reinforcement and cementitious boards faced with same |
US20080200086A1 (en) * | 2003-07-09 | 2008-08-21 | Saint-Gobain Technical Fabrics Canada, Ltd. | Cementitious boards |
US7615504B2 (en) | 2003-07-09 | 2009-11-10 | Saint-Gobain Technical Fabrics America, Inc. | Cementitious boards |
US20050009428A1 (en) * | 2003-07-09 | 2005-01-13 | Saint Gobain Technical Fabrics | Fabric reinforcement and cementitious boards faced with same |
US20060013950A1 (en) * | 2003-07-09 | 2006-01-19 | Porter John F | Fabric reinforcement and cementitious boards faced with same |
US20050136758A1 (en) * | 2003-12-19 | 2005-06-23 | Saint Gobain Technical Fabrics | Enhanced thickness fabric and method of making same |
US7786026B2 (en) | 2003-12-19 | 2010-08-31 | Saint-Gobain Technical Fabrics America, Inc. | Enhanced thickness fabric and method of making same |
JP2006233750A (en) * | 2005-01-28 | 2006-09-07 | Xella Trockenbau-Systeme Gmbh | Light-weight board for construction |
EP1686220A1 (en) | 2005-01-28 | 2006-08-02 | Xella Trockenbau-Systeme GmbH | Lightweight construction panel |
US20070261365A1 (en) * | 2006-04-24 | 2007-11-15 | James Keene | Building facade construction system and methods therefor |
US8245472B2 (en) * | 2006-04-24 | 2012-08-21 | Keene Building Products Co., Inc. | Building facade construction system and methods therefor |
US8618445B2 (en) | 2008-09-16 | 2013-12-31 | United States Gypsum Company | Heating system |
US20100065543A1 (en) * | 2008-09-16 | 2010-03-18 | Ashish Dubey | Heating system |
US20100065542A1 (en) * | 2008-09-16 | 2010-03-18 | Ashish Dubey | Electrical heater with a resistive neutral plane |
US8039774B2 (en) | 2008-09-16 | 2011-10-18 | United States Gypsum Company | Electrical heater with a resistive neutral plane |
US20100126110A1 (en) * | 2008-11-21 | 2010-05-27 | Maxxon Corporation | Installing underlayment systems |
US8590268B2 (en) | 2008-11-21 | 2013-11-26 | Maxxon Corporation | Installing underlayment systems |
US20100319832A1 (en) * | 2008-12-16 | 2010-12-23 | Herbert Charles G | Polyolefin Coated Fabric Reinforcement and Cementitious Boards Reinforced with Same |
US7803723B2 (en) | 2008-12-16 | 2010-09-28 | Saint-Gobain Technical Fabrics America, Inc. | Polyolefin coated fabric reinforcement and cementitious boards reinforced with same |
US20100151757A1 (en) * | 2008-12-16 | 2010-06-17 | Saint-Gobain Technical Fabrics America, Inc. | Polyolefin coated fabric reinforcement and cementitious boards reinforced with same |
US8852368B2 (en) | 2008-12-16 | 2014-10-07 | Saint-Gobain Adfors Canada, Ltd. | Polyolefin coated fabric reinforcement and cementitious boards reinforced with same |
US8146310B2 (en) | 2009-03-11 | 2012-04-03 | Keene Building Products Co., Inc. | Noise control flooring system |
US8528286B2 (en) | 2009-11-10 | 2013-09-10 | Keene Building Products Co., Inc. | Sound control mat |
US8898981B2 (en) | 2010-02-15 | 2014-12-02 | Construction Research & Technology Gmbh | Exterior finish system |
US9194131B2 (en) | 2010-02-15 | 2015-11-24 | Construction Research & Technology Gmbh | Exterior finish system |
US8806825B2 (en) * | 2010-02-15 | 2014-08-19 | Construction Research & Technology Gmbh | Exterior finish system |
US20110197528A1 (en) * | 2010-02-15 | 2011-08-18 | Construction Research & Technology Gmbh | Exterior Finish System |
US20140373474A1 (en) * | 2010-02-15 | 2014-12-25 | Constr Res & Tech Gmbh | Exterior finish system |
US9091072B2 (en) * | 2010-02-15 | 2015-07-28 | Construction Research & Technology Gmbh | Exterior finish system |
EP2381179A1 (en) | 2010-04-20 | 2011-10-26 | Fermacell GmbH | Plant raising table |
US8734932B2 (en) | 2011-01-17 | 2014-05-27 | Keene Building Products Co., Inc. | Drainage mat |
US8647734B2 (en) | 2011-01-17 | 2014-02-11 | Keene Building Products Co., Inc. | Drainage mat |
WO2012177228A2 (en) | 2011-06-21 | 2012-12-27 | Ti̇cem İleri̇ Yapi Teknoloji̇leri̇ Sanayi̇ Ti̇caret Danişmanlik Li̇mi̇ted Şi̇rketi̇ | System and method for producing thin cement-based panels having high strength, durability and production rate |
US9481768B1 (en) | 2013-03-15 | 2016-11-01 | Revolutionary Plastics, Llc | Method of mixing to form composition |
US10336036B2 (en) | 2013-03-15 | 2019-07-02 | United States Gypsum Company | Cementitious article comprising hydrophobic finish |
US11685965B2 (en) * | 2015-04-03 | 2023-06-27 | Metallo Belgium | Construction elements with slag from non-ferrous metal production |
US9970192B2 (en) * | 2016-03-28 | 2018-05-15 | Bay Design, Inc. | Multifunctional panel system and attachment means |
WO2019126149A1 (en) * | 2017-12-19 | 2019-06-27 | Saint-Gobain Adfors Canada, Ltd. | A reinforcing layer, a cementitious board, and method of forming the cementitious board |
US11865820B2 (en) | 2017-12-19 | 2024-01-09 | Saint-Gobain Adfors Canada, Ltd. | Reinforcing layer, a cementitious board, and method of forming the cementitious board |
CN108930388A (en) * | 2018-08-29 | 2018-12-04 | 江西远洋威利实业有限公司 | A kind of technique using trade waste flyash production graphene heating board |
CN108930388B (en) * | 2018-08-29 | 2020-12-01 | 江西远洋威利实业有限公司 | Process for producing graphene heating plate by using industrial waste coal ash |
Also Published As
Publication number | Publication date |
---|---|
US8413333B2 (en) | 2013-04-09 |
US20100146788A1 (en) | 2010-06-17 |
US20130231019A1 (en) | 2013-09-05 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US8413333B2 (en) | Method for making an asymmetrical concrete backerboard | |
CA1190463A (en) | Method and apparatus for making reinforced cement board | |
US6941720B2 (en) | Composite building material | |
EP1012422B1 (en) | Cementitious panel with reinforced edges | |
US5268226A (en) | Composite structure with waste plastic core and method of making same | |
US9017495B2 (en) | Methods of making smooth reinforced cementitious boards | |
EP0383510B1 (en) | Gypsum board | |
US5209968A (en) | Composite structure with waste plastic core and method of making same | |
EP1218603B1 (en) | System and method for making wallboard or backerboard sheets including aerated concrete | |
US20040043682A1 (en) | Composite board | |
AU2002211394A1 (en) | Composite building material | |
US5322738A (en) | Clay building board and process for producing it | |
RU2102240C1 (en) | Method of production of combination slabs | |
CA2924051C (en) | Lightweight cementitious panel possessing high durability | |
EP1102904A1 (en) | Building board and its production | |
AU2006246450A1 (en) | Composite building material |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |