Classifications

• • 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
  • C04B28/06—Aluminous cements
  • C04B28/065—Calcium aluminosulfate cements, e.g. cements hydrating into ettringite
• • 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
• • 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
  • C04B28/06—Aluminous cements
• • 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
  • C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
  • C04B2103/0045—Polymers chosen for their physico-chemical characteristics
  • C04B2103/0053—Water-soluble polymers
• • 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
  • C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
  • C04B2103/0045—Polymers chosen for their physico-chemical characteristics
  • C04B2103/0057—Polymers chosen for their physico-chemical characteristics added as redispersable powders
• • 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
  • C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
  • C04B2103/0045—Polymers chosen for their physico-chemical characteristics
  • C04B2103/0065—Polymers characterised by their glass transition temperature (Tg)
• • 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
  • C04B2111/00603—Ceiling 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
• • 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
  • C04B2111/52—Sound-insulating 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
  • C04B2111/60—Flooring materials
  • C04B2111/62—Self-levelling compositions
• • 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

Definitions

• the invention relates to a mortar composition, in particular for preparing viscoelastic bodies or structures.
• Another object of the invention is a shaped body comprising the mortar composition after hardening with water and a structure, in particular a floor, a wall or a ceiling, comprising the shaped body.
• the invention relates to a method for producing of the structure as well as to the use of the mortar composition and the shaped body.
• the most dominant transmission of undesirable sound or noise is through the structure of the vessel.
• the engine, the propeller, the gearbox etc. each creates energy waves that transmit as structure-borne noise into the air from the large flat areas, such as e.g. decks and bulkheads, that act as sounding boards.
• Airborne noise is less dominant as sounds carried along companionways and laterally through partitions and bulkheads reduce substantially with the distance from the source.
• viscoelastic damping systems can be applied directly onto vibrating areas or surfaces. These systems will reduce the radiation of low frequency noise and transform the vibrations from kinetic energy into heat.
• a highly efficient system consists of a thin two-component polyurethane layer which is directly laid on a support surface to be damped (e.g. a deck surface made of steel or aluminum) and a constraining layer (e.g. a mortar based layer or steel tiles) put on top of the polyurethane layer.
• a support surface to be damped e.g. a deck surface made of steel or aluminum
• a constraining layer e.g. a mortar based layer or steel tiles
• the damping element should absorb noise in the frequency range of 5-600 Hz.
• the damping element should in particular be suitable for marine applications.
• the damping element should preferably be free of isocyanates and corrosive compounds.
• the damping element should additionally have good adhesion to different kind of materials, in particular to mortar, concrete and metals, such as e.g. steel, aluminum and zinc.
• the damping element should be safe and easy to produce and use.
• the damping element should preferably be applicable using standard equipment and should be self-levelling.
• the core of the invention is a mortar composition, in particular for preparing a viscoelastic structure and/or acoustic damping element, comprising or consisting of:
• Such mortar composition can be used to produce advantageous viscoelastic structures or acoustic damping elements which are capable of absorbing noise in the frequency range of 5-600 Hz, e.g. in marine applications, without the need of any isocyanate based materials or corrosive compounds.
• the mortar composition in particular in dry state, is mixed with an appropriate amount of water. After hardening of the mortar composition, the viscoelastic structure or acoustic damping element is ready. Furthermore, the mortar composition itself can be a one-component mixture. This will exclude the risk of a mix up or wrong dosing of individual components by users.
• the mortar compositions or the viscoelastic structures made thereof feature good adhesion to different kind of materials, in particular to mortar, concrete and metals, such as e.g. steel, aluminum and zinc. Therefore, the viscoelastic structures or acoustic damping elements made from the inventive mortar compositions are highly compatible with elements of existing damping systems, such as e.g. existing constraining layers.
• hydraulic binder in particular stands for substances that harden because of hydration chemical reactions producing hydrates.
• the hydrates produced are not water-soluble.
• the hydration chemical reactions of the hydraulic binder takes essentially place independently of the water content. This means that the hydraulic binder can harden and retain its strength even when exposed to water, e.g. underwater or under high humidity conditions.
• layered material stands in particular for a material with a layered crystal structure. Especially, the layered material is a plate-like material. A plate-like material is in particular a material with a length and width larger than its thickness.
• a first aspect of the invention relates to a mortar composition, in particular for preparing a viscoelastic structure and/or acoustic damping element, comprising or consisting of:
• all the amounts are with respect to the total weight of the mortar composition.
• the mortar composition is a dry mortar composition.
• the mortar composition is essentially free of water or an amount of water is below 1 wt.-%, in particular below 0.5 wt.-% or below 0.1 wt.-%, with respect to the total weight of the mortar composition.
• the polymer is present in solid state, especially as a powder.
• the mortar composition is a one-component mixture. That means that all the individual materials and/or substances are intermixed.
• One-component compositions are in particular easy to handle and exclude the risk of a mix up or wrong dosing of individual components by users.
• a first component may e.g. be present in a first receptacle comprising the hydraulic binder, the polymer and the layered material.
• a second component present in a second receptacle, may comprise the aggregates. Other distributions are possible as well.
• Two- or multi-component mortar compositions allow e.g. for adjusting the mortar composition with regard to specific applications.
• the hydraulic binder comprises or consists of cement.
• the cement is Portland cement and/or alumina cement and/or sulphoaluminate cement. Mixtures of Portland cement and aluminum cement are possible as well.
• Preferred Portland cement is according to norm EN 197, in particular of type CEM I.
• the term “alumina cement” stands in particular for a cement with an aluminum content, measured as Al 2 O 3 , of at least 30 wt.-%, especially at least 35 wt.-%, in particular 35-58 wt.-%.
• the alumina cement is alumina cement according to standard EN 14647.
• Alumina cements have been proven to be especially advantageous in the present context.
• the hydraulic binder can optionally comprise or consist of latent hydraulic and/or pozzolanic binder materials.
• latent hydraulic and/or pozzolanic binder materials stands in particular for type II concrete additives with latent hydraulic and/or pozzolanic character according to EN 206-1.
• the latent hydraulic or pozzolanic binder material comprises or consists of slag, fly ash, silica fume, metacaolin and/or natural pozzolanes.
• the hydraulic binder comprises or consists of 10-95 wt. % of hydraulic binder, in particular Portland cement and/or alumina cement, and 90-5 wt. % of latent hydraulic and/or pozzolanic binder material. More preferably, the binder composition comprises or consists of 30-90 wt. % of hydraulic binder and 70-10 wt. % of latent hydraulic and/or pozzolanic binder material.
• a preferred amount of hydraulic binder is 2-15 wt.-%, in particular 3-10 wt.-%, especially 3-6 wt.-%, with respect to the total weight of the mortar composition.
• Preferred aggregates are selected from sand, quartz, calcium carbonate, natural river sand, basalt, metallic aggregates, and or rubber.
• the grain size of the aggregates is preferably at most 4 mm, in particular at most 2 mm, especially at most 1 mm.
• other aggregates may be used as well for specific purposes.
• an amount of the aggregates is 40-70 wt.-%, in particular 45-65 wt.-%, especially 50-60 wt.-%, with respect to with respect to the total weight of the mortar composition.
• the polymer is a water soluble or water redispersible polymer, in particular a water soluble polymer.
• a water soluble polymer Such polymers have proven to be beneficial in the present mortar compositions. However, e.g. for specific purposes, other polymers might be suitable as well.
• the polymer is used to control the acoustic properties and/or damping, e.g. the acoustic temperature range, of the mortar composition and/or a shaped body made thereof.
• the polymer has a glass transition temperature of ⁇ 40-110° C., in particular 0-90° C., especially 15-40° C.
• Such polymers improve the viscoelastic properties of hardened mortar compositions further.
• the glass transition temperature of the polymer is used to control the acoustic properties and/or damping, e.g. the acoustic temperature range, of the mortar composition and/or a shaped body made thereof.
• the polymer is a homopolymer or copolymer based on one or more monomers selected from vinyl acetate, vinyl alcohol, acrylic acid, acrylate, methacrylic acid, methacrylate and ethylene.
• the polymer is selected from polyvinyl esters, polyvinyl alcohols, polyacrylates, polymethacrylates, butylacrylates, vinynilversatate or mixtures thereof.
• the polymer is selected from polyacrylate, polyvinyl acetate), polyvinyl alcohol), ethylene-vinyl acetate copolymer, ethylene-vinyl alcohol copolymer or mixtures thereof.
• the layered material is a layered mineral.
• the layered material is selected from clay and/or mica.
• “clay” stands in particular for phyllosilicates and/or sheet silicates.
• the layered material comprises or consists of vermiculite.
• a grain size of the layered material is 4 mm at most, preferably 2 mm at most, especially 1 mm at most.
• a preferred amount of layered material is 1-25 wt.-%, in particular 2-10 wt.-%, especially 4-10 wt.-%, especially preferred 5-10 wt.-%, with respect to the total weight of the mortar composition.
• the mortar composition additionally comprises a porous filler.
• the porous filler has a porosity of at least 25 vol.-%, especially at least 50 vol.-%, in particular at least 75 vol.-%, with respect to the total volume of the porous filler.
• the porous filler comprises volcanic rock.
• the porous filler comprises or consists of pumice and/or perlite.
• the porous filler may also comprise cork and/or recycled materials.
• a grain size of the porous filler is 4 mm at most, preferably 2 mm at most, especially 1 mm at most.
• a preferred amount of the porous filler is 0.5-40 wt.-%, especially 1-25 wt.-%, in particular 2-6 wt.-%, with respect to the total weight of the mortar composition.
• the mortar composition comprises a thixotropic agent, in particular silica, silica fume, cellulose, and/or saccharides.
• the mortar composition comprises a plasticizer, whereby the plasticizer is in particular selected from the group of lignosulfonates, gluconates, naphtalenesulfonates, melamine sulfonates, vinyl copolymers and/or polycarboxylates. Polycarboxylate ethers are preferred.
• the plasticizer is chemically different from the above mentioned polymer.
• An especially preferred mortar composition comprises or consists of:
• hydraulic binder comprises cement, in particular alumina cement,
• polymer c) 5-75 wt.-%, especially 10-50 wt.-%, of polymer, whereby the polymer is selected from polyacrylate, polyvinyl acetate), polyvinyl alcohol), ethylene-vinyl acetate copolymer and ethylene-vinyl alcohol copolymer or mixtures thereof.
• e) optionally, 0.5-40 wt.-%, especially 1-25 wt.-%, of a porous filler, selected from pumice and/or perlite.
• the hardened mortar composition is a mortar composition as defined above after hardening with water.
• the hardened mortar composition is obtainable by mixing water with a mortar composition as defined above.
• a preferred weight ratio of water to the mortar composition is 0.15-0.7, especially 0.3-0.5.
• the shaped body features viscoelastic properties. This means that the shaped body exhibits a phase lag between strain and corresponding stress resulting in the ability to store and dissipate energy at the same time. This is in contrast to e.g. elastic bodies where stress and strain remain in phase.
• the shaped body is a flat layer, in particular with a thickness of 0.5-10 mm, preferably 1-5 mm.
• a flat layer is in particular a body with a width and a length larger than its thickness.
• a tensile strength of the shaped body according to standard ISO 37 is preferably at least 0.3 N/mm 2 , in particular at least 0.7 N/mm 2 , preferably at least 1 N/mm 2 .
• An advantageous elongation at break of the shaped body according to standard ISO 37 is at least 10%, in particular at least 25%, preferably at least 40%, especially at least 50%.
• a tensile tester according to DIN EN ISO 7500-1 part 1 is used.
• a loss factor tan ⁇ of the shaped body according to standard ISO 6721 at 0° C. and 300 Hz is preferably at least 0.05, especially at least 0.1, in particular at least 0.12, in particular preferred at least 0.13.
• Shaped bodies with the above mentioned properties are especially suitable for viscoelastic structures or acoustic damping elements.
• a further aspect of the present invention relates to a structure, in particular a floor, a wall or a ceiling, comprising the above described shaped body.
• a support element and/or a cover element is attached to the shaped body.
• the cover element can e.g. be a constraining layer.
• the shaped body is arranged between the support element and the cover element.
• the shaped body is constrained between the support element and the cover element.
• the support element is a metal layer, in particular made of steel and/or aluminum.
• a preferred cover element is formed as flat layer.
• the cover element is a cement based layer, e.g. a mortar layer.
• the cement based layer is different from the shaped body and/or the mortar composition of the present invention.
• a primer between the support element and the shaped body. This might further increase the adhesion between the support element and the shaped body.
• Another aspect of the present invention relates to a method for the production of a structure, whereby the mortar composition of the present invention is mixed with water, applied on a support structure and covered with a cover element.
• the support structure and the cover element are defined as described above.
• the mortar composition is applied with a thickness of 1-5 mm.
• the support element is a metal layer, in particular made of steel and/or aluminum.
• a preferred cover element is formed as flat layer.
• the cover element is a cement based layer, e.g. a mortar layer.
• An additional aspect of the present invention relates to the use of the mortar composition and the shaped body as herein described. Especially, the mortar composition and/or the shaped body is used for acoustic damping.
• the mortar composition and/or the shaped body is used for acoustic damping in a ship, an offshore installation, a vehicle and/or in a building, in particular in a ship or in an offshore installation.
• the mortar composition and/or the shaped body is used for acoustic damping on a floor, on a wall and/or on a ceiling, preferably on a floor.
• the acoustic properties and/or damping, e.g. the acoustic temperature range, of the mortar composition and/or the shaped body is controlled with the polymer, in particular with the glass transition temperature of the polymer.
• the mortar composition and/or the shaped body can be used as an underlay and/or primer for a cover element on a support structure.
• the mortar composition and/or the shaped body is used for increasing adhesion between the support structure and the cover element.
• the cover element is preferably a mortar layer and/or the support structure is preferably a metal layer, in particular made of steel and/or aluminum.
• Table 1 shows three inventive mortar compositions M1-M3.
• the mortar compositions have been prepared by intermixing all of the components in dry state.
• the mortar composition M1-M3 are present as dry powders.
• the loss factor tan ⁇ has been determined according to standard ISO 6721 in a known manner with an Oberst bar.
• Table 2 shows an overview of the properties of mortar composition M1-M3.
• a commercially available reference system (Ref.) has been tested as well.
• the reference system is SikaFloor® Marine PU-Red (available from Sika Denmark) which is a two component polyurethane damping compound.
• Mortar composition M1 has been applied with a thickness of 2 mm on a cleaned flat steel plate. After hardening for 24 hours, a commercially available cement based constraining layer (SikaFloor®-Marine 18, a mortar composition comprising cement and sand) has been applied.
• a commercially available cement based constraining layer (SikaFloor®-Marine 18, a mortar composition comprising cement and sand) has been applied.
• the mortar based structure was found comparable to the polyurethane based structure.
• mortar compositions according to the present invention can indeed be used as replacements for known polyurethane systems.

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• Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• Ceramic Engineering (AREA)
• Materials Engineering (AREA)
• Structural Engineering (AREA)
• Organic Chemistry (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Inorganic Chemistry (AREA)
• Curing Cements, Concrete, And Artificial Stone (AREA)
• Civil Engineering (AREA)
• Building Environments (AREA)
• Vibration Prevention Devices (AREA)
• Producing Shaped Articles From Materials (AREA)
• Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)
• Dispersion Chemistry (AREA)
• Environmental & Geological Engineering (AREA)

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• 2012
  • 2012-07-26 EP EP20120178001 patent/EP2690075A1/de not_active Withdrawn
• 2013
  • 2013-07-11 CA CA2879587A patent/CA2879587C/en active Active
  • 2013-07-11 CN CN201380038947.5A patent/CN104487400B/zh active Active
  • 2013-07-11 JP JP2015523482A patent/JP6280114B2/ja active Active
  • 2013-07-11 US US14/417,030 patent/US20150203409A1/en not_active Abandoned
  • 2013-07-11 EP EP13735286.0A patent/EP2877435A1/de active Pending
  • 2013-07-11 WO PCT/EP2013/064653 patent/WO2014016131A1/en active Application Filing
• 2017
  • 2017-06-16 US US15/625,305 patent/US11148976B2/en active Active

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