US20020170466A1 - Additive for dewaterable slurry and method of manufacturing and improving slurry containing same - Google Patents

Additive for dewaterable slurry and method of manufacturing and improving slurry containing same Download PDF

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Publication number
US20020170466A1
US20020170466A1 US10/090,362 US9036202A US2002170466A1 US 20020170466 A1 US20020170466 A1 US 20020170466A1 US 9036202 A US9036202 A US 9036202A US 2002170466 A1 US2002170466 A1 US 2002170466A1
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Prior art keywords
fly ash
slurry
microns
particle size
aluminous material
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US10/090,362
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Inventor
Basil Naji
Milton O'Chee
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James Hardie International Finance BV
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James Hardie Research Pty Ltd
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Priority claimed from AUPR3478A external-priority patent/AUPR347801A0/en
Priority claimed from AUPR3474A external-priority patent/AUPR347401A0/en
Priority claimed from AUPR3475A external-priority patent/AUPR347501A0/en
Priority claimed from AUPR3477A external-priority patent/AUPR347701A0/en
Priority claimed from AUPR3476A external-priority patent/AUPR347601A0/en
Application filed by James Hardie Research Pty Ltd filed Critical James Hardie Research Pty Ltd
Assigned to JAMES HARDIE RESEARCH PTY LIMITED reassignment JAMES HARDIE RESEARCH PTY LIMITED ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: O'CHEE, MILTON, NAJI, BASIL
Publication of US20020170466A1 publication Critical patent/US20020170466A1/en
Assigned to JAMES HARDIE INTERNATIONAL FINANCE B.V. reassignment JAMES HARDIE INTERNATIONAL FINANCE B.V. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: JAMES HARDIE RESEARCH PTY LIMITED
Assigned to JAMES HARDIE INTERNATIONAL FINANCE B.V. reassignment JAMES HARDIE INTERNATIONAL FINANCE B.V. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: JAMES HARDIE RESEARCH PTY LIMITED
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Classifications

    • 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
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B1/00—Producing shaped prefabricated articles from the material
    • B28B1/52—Producing shaped prefabricated articles from the material specially adapted for producing articles from mixtures containing fibres, e.g. asbestos cement
    • B28B1/522—Producing shaped prefabricated articles from the material specially adapted for producing articles from mixtures containing fibres, e.g. asbestos cement for producing multi-layered articles
    • 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
    • B28B7/00—Moulds; Cores; Mandrels
    • B28B7/40—Moulds; Cores; Mandrels characterised by means for modifying the properties of the moulding material
    • B28B7/46—Moulds; Cores; Mandrels characterised by means for modifying the properties of the moulding material for humidifying or dehumidifying
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B18/04—Waste materials; Refuse
    • C04B18/06—Combustion residues, e.g. purification products of smoke, fumes or exhaust gases
    • C04B18/08—Flue dust, i.e. fly ash
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
    • 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
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F13/00—Coverings or linings, e.g. for walls or ceilings
    • E04F13/02—Coverings or linings, e.g. for walls or ceilings of plastic materials hardening after applying, e.g. plaster
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F15/00—Flooring
    • E04F15/12—Flooring or floor layers made of masses in situ, e.g. seamless magnesite floors, terrazzo gypsum floors
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
    • C04B2111/00482—Coating or impregnation materials
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
    • C04B2111/00612—Uses not provided for elsewhere in C04B2111/00 as one or more layers of a layered structure
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/91—Use of waste materials as fillers for mortars or concrete
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S106/00—Compositions: coating or plastic
    • Y10S106/01—Fly ash
    • 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
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/249921—Web or sheet containing structurally defined element or component
    • Y10T428/249924—Noninterengaged fiber-containing paper-free web or sheet which is not of specified porosity
    • Y10T428/249932—Fiber embedded in 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
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/249921—Web or sheet containing structurally defined element or component
    • Y10T428/249953—Composite having voids in a component [e.g., porous, cellular, etc.]
    • Y10T428/249967—Inorganic matrix in void-containing component
    • Y10T428/249968—Of hydraulic-setting material
    • 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
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/249921—Web or sheet containing structurally defined element or component
    • Y10T428/249953—Composite having voids in a component [e.g., porous, cellular, etc.]
    • Y10T428/249971—Preformed hollow element-containing
    • Y10T428/249972—Resin or rubber element
    • 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
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/249921—Web or sheet containing structurally defined element or component
    • Y10T428/249953—Composite having voids in a component [e.g., porous, cellular, etc.]
    • Y10T428/249986—Void-containing component contains also a solid fiber or solid particle
    • 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
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
    • 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
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/26—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
    • Y10T428/263—Coating layer not in excess of 5 mils thick or equivalent
    • Y10T428/264—Up to 3 mils
    • Y10T428/265—1 mil or less
    • 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
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • 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
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31652—Of asbestos
    • Y10T428/31667—Next to addition polymer from unsaturated monomers, or aldehyde or ketone condensation product
    • 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.]

Definitions

  • the present invention relates to admixtures for slurries and in particular cementitious slurry compositions, and methods of manufacturing and improving the same.
  • plasticisers sometimes known as water reducers, dispersion agents or super plasticisers, act to increase the workability and validity of the slurry for a given quantity of water. Examples include lignosulphonates, naphthalene sulphonate-formaldehyde condensates.
  • these water reducers are added at around 0.3% by weight of cement and provide between 8 and 12% reduction in the water cement ratio, depending upon the addition procedure. Additions of up to 1% by cement provide up to 35% reduction in the water to cement ratio.
  • plasticiser/water reducer or combinations thereof to obtain further water reduction of up to 50%.
  • detrimental effects are produced, eg setting times increased and compressive strength of a cementitious mixture reduced.
  • the present invention provides an additive for a cementitious slurry comprising of one or both of the following mineral components:
  • fly ash having a predominant particle size of up to about 10 microns
  • aluminous material having a predominant particle size of up to about 150 microns.
  • the aforementioned mineral additive can be used in combination with a conventional water reducer/plasticiser to enhance the water reduction capabilities of such a conventional additive.
  • the present invention provides a cementitious slurry comprising an hydraulic binder, water, a plasticiser and a mineral additive including one or both of the following components:
  • fly ash having a predominant particle size of up to about 10 microns
  • aluminous material having a predominant particle size of up to about 150 microns
  • the mineral additive being added in a quantity sufficient to provide a water reduction effect.
  • the present invention provides a method of reducing the water requirements of a cementitious slurry comprising adding an effective amount of one or both of the following mineral components: i) fly ash having a predominant particle size of up to about 10 microns, and ii) aluminous material having a predominant particle size of up to about 150 microns.
  • the present invention provides a method of improving the properties of a cementitious slurry comprising adding an effective amount of one or both of the following mineral components: i) fly ash having a predominant particle size of up to about 10 microns, and ii) aluminous material having a predominant particle size of up to about 150 microns.
  • the reference to water reduction effect relates to the ability of the mineral additive to effectively reduce the quantity of water required to obtain a particular viscosity.
  • a slurry is designed to have a particular predetermined viscosity for flowability, pumpability or application reasons.
  • the mineral additive described above provides excellent water reduction properties for a slurry. As discussed, it can be used on its own to provide water reduction to the slurry or in combination with a conventional plasticiser/water reducer.
  • the preferred embodiments of the present invention relate to the use of a mineral additive to manufacture and improve the properties of a cementitious slurry. More preferably, one or both of the following mineral components are added to the slurry: i) fly ash having a predominant particle size of up to about 10 microns, and ii) aluminous material having a predominant particle size of up to about 150 microns.
  • fly ash in the mineral additive refers to fly ash with a predominant particle size of up to about 10 microns.
  • fly ash is a solid powder having a chemical composition similar to or the same as the composition of material that is produced during the combustion of powdered coal.
  • the composition typically comprises about 25 to 60% silica, about 10 to 30% Al 2 O 3 , about 5 to 25% Fe 2 O 3 , up to about 20% CaO and up to about 5% MgO.
  • Fly ash particles are typically spherical and range in diameter from about 1 to 100 microns. It is the smaller size fraction of fly ash particles with a predominant size below about 10 microns that has surprising water reduction properties.
  • the fly ash preferably makes up about 30-100% based on weight of cement.
  • the fly ash is between about 40 and 90% and most preferably about 50 to 70% based on weight of cement.
  • the aluminous material in the mineral additive preferably has a predominant particle size less than about 150 microns.
  • the reference to “aluminous material” should not be taken literally but refers to alumina type materials including hydrated, partially hydrated and unhydrated alumina.
  • the alumina content of aluminous material based on the weight of cement is between about 5 and 30%, preferably about 10 to 25% and most preferably about 15 to 20%.
  • the ratio of hydrated alumina:fly ash is preferably between about 1:1 to 1:10.
  • hydroaulic or cementitious binder means all inorganic materials which comprise compounds of calcium, aluminum, silicon, oxygen, and/or sulfur which exhibit “hydraulic activity” that is, which set solid and harden in the presence of water.
  • Cements of this type include common Portland cements, fast setting or extra fast setting, sulphate resisting cements, modified cements, alumina cements, high alumina cements, calcium aluminate cements and cements which contain secondary components such as fly ash, slag and the like.
  • the amount of cement present in the composition of the preferred embodiments of the present invention has a lower limit of about 10 weight percent based on the total dry ingredients, preferably about 15 weight percent, more preferably about 20 weight percent, the upper limit of the amount of the cement is about 50 weight percent, preferably about 40 weight percent, more preferably about 30 weight percent.
  • the cementitious composition may optionally but preferably include at least one filler material, e.g. graded and ungraded aggregate such as washed river gravel, crushed igneous rock or limestone, lightweight aggregate, crushed hard-burnt clay bricks or air-cooled blast furnace slag, sand, calcium carbonate, silica flour, vermiculite, perlite, gypsum, etc.
  • at least one filler material e.g. graded and ungraded aggregate such as washed river gravel, crushed igneous rock or limestone, lightweight aggregate, crushed hard-burnt clay bricks or air-cooled blast furnace slag, sand, calcium carbonate, silica flour, vermiculite, perlite, gypsum, etc.
  • the amount of filler present in the cementitious composition preferably has a lower limit of about 5 weight percent based on the total dry ingredients, preferably about 10 weight percent, more preferably about 15 weight percent; the upper limit being about 30 weight percent, preferably about 25 weight percent, more preferably about 20 weight percent.
  • the cementitious composition may optionally contain other additives including: cement plasticising agents such as melamine sulphonate-formaldehyde condensates, naphthalene sulphonate-formaldehyde condensates, naphthalene sulphonates, calcium lignosulphonates, sodium lignosulphonates, saccharose, sodium gluconate, sulphonic acids, carbohydrates, amino carboxylic acids, polyhydroxy carboxylic acids, sulphonated melamine, and the like.
  • cement plasticising agents such as melamine sulphonate-formaldehyde condensates, naphthalene sulphonate-formaldehyde condensates, naphthalene sulphonates, calcium lignosulphonates, sodium lignosulphonates, saccharose, sodium gluconate, sulphonic acids, carbohydrates, amino carboxylic acids, polyhydroxy carboxylic acids, sulphonated melamine,
  • the amount of conventional plasticiser used in the dry cement composition will vary, depending on the fluidising ability of the particular cement plasticiser selected. Generally, the amount of cement plasticiser is preferably in the range of about 0.3 to about 3 wt %, and more preferably about 0.5 to about 2 wt %, based on the weight of the dry cement composition.
  • Preferred plasticisers include Melment. F-10, a melamine-formaldehyde-sodium bisulphite polymer dispersant, marketed by SKW-Trostberg in the form of a fine white powder.
  • Another suitable plasticiser is Neosyn, a condensed sodium salt of sulphonated naphthalene formaldehyde, available from Hodgson Chemicals.
  • Thickener may also be used in the cementitious composition including one or more of the polysaccharide rheology modifiers which can be further subdivided into cellulose based materials and derivatives thereof, starch based materials and derivatives thereof, and other polysaccharides.
  • Suitable cellulose based rheology-modifying agents include, for example, methylhydroxyethylcellulose, hydroxymethylethylcellulose, carboxymethylcellulose, methylcellulose, ethylcellulose, hydroxyethylcellulose, hydroxyethylpropylcellulose, etc.
  • suitable rheology modifiers will not be listed here, nevertheless, many other cellulose materials have the same or similar properties as these and are equivalent.
  • Suitable starch based materials include, for example, amylopectin, amylose, sea-gel, starch acetates, starch hydroxyethyl ethers, ionic starches, long-chain alkylstarches, dextrins, amine starches, phosphate starches, and dialdehyde starches.
  • Other natural polysaccharide based rheology-modifying agents include, for example, alginic acid, phycocolloids, agar, gum arabic, guar gum, welan gum, locust bean gum, gum karaya, and gum tragacanth.
  • the thickener addition rate in the cementitious composition may range between 0.0001 and 0.5% based on the weight of the dry cement composition.
  • Latex addition of at least one latex selected from the group consisting of: an acrylic latex, a styrene latex , and a butadiene latex is also preferred.
  • This component improves adherence, elasticity, stability and impermeability of the cementitious compositions containing it, and also favours formation of flexible films.
  • the latex may be used in solid amounts of about 0.5 to about 20 wt %, based on the weight of the dry cement composition. Preferably, it is present in an amount of about 1 to about 15 wt %, and more preferably about 10 wt %, based on the weight of the dry cement composition.
  • the cementitious composition may optionally incorporate as a substitute to the latex emulsion a proportion of a powdered vinyl polymer or other equivalent polymeric material, to enhance the adhesion; resilience and flexural strength; and abrasion resistance of the composition.
  • the powdered vinyl polymer is preferably polyvinyl acetate or a copolymer of vinyl acetate with another monomer, such as ethylene.
  • a preferred vinyl acetate resin is VINNAPAS LL5044 thermoplastic resin powder, containing a vinyl acetate-ethylene copolymer, available from WACKER.
  • the powdered vinyl polymer may be used in amounts of about 0.5 to about 20 wt %, based on the weight of the dry cement composition. Preferably, it is present in an amount of about 1 to about 15 wt %, and more preferably about 10 wt %, based on the weight of the dry cement composition.
  • the cementitious composition may optionally contain about 0-40 wt % of other fillers/additives such as mineral oxides, hydroxides and clays, metal oxides and hydroxides, fire retardants such as magnesite, thickeners, silica fume or amorphous silica, colorants, pigments, water sealing agents, water reducing agents, setting rate modifiers, hardeners, filtering aids, plasticisers, dispersants, foaming agents or flocculating agents, water-proofing agents, density modifiers or other processing aids
  • other fillers/additives such as mineral oxides, hydroxides and clays, metal oxides and hydroxides, fire retardants such as magnesite, thickeners, silica fume or amorphous silica, colorants, pigments, water sealing agents, water reducing agents, setting rate modifiers, hardeners, filtering aids, plasticisers, dispersants, foaming agents or flocculating agents, water-proofing agents, density modifiers or other processing aid
  • Example 1 demonstrates a means of enhancing the water reduction effect in plasticised mixes using a mineral additive with a specified size range, namely the small size fraction fly ash, without resorting to overdosing with water reducer. The result is a more durable mix with higher strength and reduced shrinkage.
  • Mix 1 which was comprised of cement, fly ash and cenospheres (ceramic hollow spheres) required 400 ml of water to achieve the required viscosity (in the presence of 1% addition of Melment F15 water reducer).
  • the % solids in this case is 71.4%.
  • Mix 1 which was comprised of cement, fly ash and silica required 400 ml of water to achieve the required viscosity (in the presence of 1% water reducer addition).
  • the % solids in this case is 71.4%.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Architecture (AREA)
  • Ceramic Engineering (AREA)
  • Structural Engineering (AREA)
  • Civil Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
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  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Producing Shaped Articles From Materials (AREA)
  • Laminated Bodies (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Coating Apparatus (AREA)
  • Paper (AREA)
  • Paints Or Removers (AREA)
  • Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)
  • Aftertreatments Of Artificial And Natural Stones (AREA)
  • Porous Artificial Stone Or Porous Ceramic Products (AREA)
  • Spray Control Apparatus (AREA)
  • Processing Of Solid Wastes (AREA)
  • Soil Conditioners And Soil-Stabilizing Materials (AREA)
  • Production Of Multi-Layered Print Wiring Board (AREA)
  • Manufacturing Of Printed Wiring (AREA)
  • Reinforced Plastic Materials (AREA)
  • Building Environments (AREA)
US10/090,362 2001-03-02 2002-03-04 Additive for dewaterable slurry and method of manufacturing and improving slurry containing same Abandoned US20020170466A1 (en)

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AUPR3478A AUPR347801A0 (en) 2001-03-02 2001-03-02 Coatings for building products
AUPR3474 2001-03-02
AUPR3477 2001-03-02
AUPR3474A AUPR347401A0 (en) 2001-03-02 2001-03-02 A composite product
AUPR3475A AUPR347501A0 (en) 2001-03-02 2001-03-02 Spattering apparatus
AUPR3476 2001-03-02
AUPR3478 2001-03-02
AUPR3477A AUPR347701A0 (en) 2001-03-02 2001-03-02 A method and apparatus for forming a laminated sheet material by spattering
AUPR3475 2001-03-02
AUPR3476A AUPR347601A0 (en) 2001-03-02 2001-03-02 Additive for dewaterable slurry

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US10/090,388 Expired - Fee Related US6824715B2 (en) 2001-03-02 2002-03-04 Method and apparatus for forming a laminated sheet material by spattering
US10/090,385 Abandoned US20020179219A1 (en) 2001-03-02 2002-03-04 Composite product and method of manufacture
US10/090,376 Expired - Fee Related US6692570B2 (en) 2001-03-02 2002-03-04 Spattering apparatus
US10/090,362 Abandoned US20020170466A1 (en) 2001-03-02 2002-03-04 Additive for dewaterable slurry and method of manufacturing and improving slurry containing same
US10/090,561 Expired - Fee Related US7704316B2 (en) 2001-03-02 2002-03-04 Coatings for building products and methods of making same
US10/090,387 Expired - Lifetime US6749897B2 (en) 2001-03-02 2002-03-04 Coatings for building products and methods of using same
US10/090,299 Expired - Lifetime US7396402B2 (en) 2001-03-02 2002-03-04 Coatings for building products and dewatering aid for use with same
US10/090,375 Abandoned US20030000424A1 (en) 2001-03-02 2002-03-04 Coatings for building products and formulations for use with same
US10/090,560 Abandoned US20020189499A1 (en) 2001-03-02 2002-03-04 Coating for building products and composite products incorporating same
US10/090,406 Expired - Lifetime US6893751B2 (en) 2001-03-02 2002-03-04 Composite product
US10/090,338 Abandoned US20020189500A1 (en) 2001-03-02 2002-03-04 Additive for dewaterable slurry
US11/128,778 Abandoned US20050208287A1 (en) 2001-03-02 2005-05-13 Composite product
US11/634,285 Abandoned US20070077436A1 (en) 2001-03-02 2006-12-04 Composite product
US12/691,505 Expired - Fee Related US8153245B2 (en) 2001-03-02 2010-01-21 Composite product

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US10/090,388 Expired - Fee Related US6824715B2 (en) 2001-03-02 2002-03-04 Method and apparatus for forming a laminated sheet material by spattering
US10/090,385 Abandoned US20020179219A1 (en) 2001-03-02 2002-03-04 Composite product and method of manufacture
US10/090,376 Expired - Fee Related US6692570B2 (en) 2001-03-02 2002-03-04 Spattering apparatus

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US10/090,561 Expired - Fee Related US7704316B2 (en) 2001-03-02 2002-03-04 Coatings for building products and methods of making same
US10/090,387 Expired - Lifetime US6749897B2 (en) 2001-03-02 2002-03-04 Coatings for building products and methods of using same
US10/090,299 Expired - Lifetime US7396402B2 (en) 2001-03-02 2002-03-04 Coatings for building products and dewatering aid for use with same
US10/090,375 Abandoned US20030000424A1 (en) 2001-03-02 2002-03-04 Coatings for building products and formulations for use with same
US10/090,560 Abandoned US20020189499A1 (en) 2001-03-02 2002-03-04 Coating for building products and composite products incorporating same
US10/090,406 Expired - Lifetime US6893751B2 (en) 2001-03-02 2002-03-04 Composite product
US10/090,338 Abandoned US20020189500A1 (en) 2001-03-02 2002-03-04 Additive for dewaterable slurry
US11/128,778 Abandoned US20050208287A1 (en) 2001-03-02 2005-05-13 Composite product
US11/634,285 Abandoned US20070077436A1 (en) 2001-03-02 2006-12-04 Composite product
US12/691,505 Expired - Fee Related US8153245B2 (en) 2001-03-02 2010-01-21 Composite product

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