EP2164815A1 - Isolant thermique et de bruits de pas à faible teneur en liant hydraulique et forte teneur en polystyrène moussé - Google Patents

Isolant thermique et de bruits de pas à faible teneur en liant hydraulique et forte teneur en polystyrène moussé

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Publication number
EP2164815A1
EP2164815A1 EP08774685A EP08774685A EP2164815A1 EP 2164815 A1 EP2164815 A1 EP 2164815A1 EP 08774685 A EP08774685 A EP 08774685A EP 08774685 A EP08774685 A EP 08774685A EP 2164815 A1 EP2164815 A1 EP 2164815A1
Authority
EP
European Patent Office
Prior art keywords
insulating
insulation
composition according
polystyrene
dry composition
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.)
Withdrawn
Application number
EP08774685A
Other languages
German (de)
English (en)
Inventor
Michael Jernei
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sika Technology AG
Original Assignee
Sika Technology AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sika Technology AG filed Critical Sika Technology AG
Priority to EP08774685A priority Critical patent/EP2164815A1/fr
Publication of EP2164815A1 publication Critical patent/EP2164815A1/fr
Withdrawn legal-status Critical Current

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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
    • 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
    • C04B16/00—Use of organic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of organic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B16/04—Macromolecular compounds
    • C04B16/08—Macromolecular compounds porous, e.g. expanded polystyrene beads or microballoons
    • 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
    • C04B28/04—Portland 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
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/20—Resistance against chemical, physical or biological attack
    • C04B2111/28—Fire resistance, i.e. materials resistant to accidental fires or high temperatures
    • 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

Definitions

  • the invention relates to Dämmstoffzusarrinnen applicationen and insulation materials for thermal and impact sound insulation, which are formulated on the basis of foamed polystyrene and hydraulic binders.
  • EP 0 819 662 A1 describes an insulating material for heat and impact sound insulation of a floor which, in addition to a foam granulate and a cementitious binder, has a proportion of amorphous silica of at least 10% by weight, based on the cement. The mode of action is explained here by the pozzolanic effect of the silicic acid used.
  • the thermal conductivity [W / mK] and on the other hand the impact sound reduction [dB] or, with that, the dynamic stiffness [MN / m 3 ] are determined.
  • Bonded granular beds according to the prior art typically have thermal conductivities of greater than 0.044 W / mK and dynamic stiffness of about 20 MN / m 3 after loading.
  • DE 28 36 855 A1 discloses a thermal layer based on organic closed-cell waterproof foam particles with aluminum oxide cement, a dispersion of a copolymehsate and finely divided, swelling-acting drying aids, water-soluble thixotropic agents and instant adhesion and air-pore stabilizers.
  • DE 200 17 460 U1 discloses a dry mix of polystyrene granules (polystyrene recyclate) and a hydraulic binder, wherein the binder is ground on the granules in order to prevent that takes place during storage, a demixing of polystyrene and binder.
  • the dry blends disclosed herein have very high densities, which is due to the high proportion of cement, or on the small proportion of polystyrene granules. Such compositions have to be improved heat and impact sound properties.
  • DE 29 30 615 A1 discloses a mixture for a fast-curing screed with closed-cell foam particles, a hydraulic binder, diluents, leveling agents, water retention agents and a lubricant.
  • these mixtures have a very low proportion of foamed polystyrene, so that such compositions have much to be improved heat and impact sound properties.
  • WO 2005/021459 A2 discloses an insulation composition with foam granules and a cementitious binder, a water retention agent in an amount between 0.1 and 25 wt .-%, based on the cement, and a ratio of foam granules to cement of 20 wt .-% and 120% by weight.
  • WO 2005/021460 A2 discloses an insulation composition with foam granules and a cementitious binder, a water retention agent, a dispersion plastic in an amount of 2 to 15 wt .-% dry matter based on the cement and cement in an amount below 100 kg / m 3 of water based insulation composition.
  • Object of the present invention was to develop insulating materials based on a hydraulic binder, which have the highest possible proportion of foamed polystyrene, and after curing with water, a high intrinsic strength and excellent heat and impact sound insulation, especially after mechanical stress, have can be processed well and quickly accessible, or ready to go, are.
  • an inventive insulation-dry composition according to claim 1, or by an insulation composition containing the inventive insulation-dry composition and water.
  • This allows use of hydraulic binder of less than 80% by weight, and of expanded polystyrene of more than 8% by weight, based on the insulation dry composition, while maintaining excellent mechanical strength as well as excellent insulating properties.
  • a significant advantage of these compositions is good processability coupled with rapid accessibility and ready-to-use, as well as excellent strength with further reduced bulk density and thus improved thermal conductivity.
  • FIG. 1 Further aspects of the present invention are uses of an inventive insulation dry composition or an insulation composition in a floor construction for heat-insulating and / or impact sound insulating purposes and a floor construction comprising an insulating material obtained from an inventive dry insulation composition or an insulation composition.
  • Fig. 1 a screed floor construction in cross section in the wall area
  • Fig. 2 is a screed floor construction in cross section with lines
  • FIG. 3 shows the measuring arrangement for determining the dynamic rigidity
  • FIG. 4 shows the schematic measuring arrangement according to FIG
  • the present invention relates, in a first aspect, to an insulation dry composition for producing impact sound insulation and thermal insulation.
  • This insulation dry composition comprises
  • a hydraulic binder in an amount of less than 80% by weight, based on the insulating dry composition
  • at least one dispersion plastic c) at least polystyrene in the form of foamed polystyrene beads
  • the amount of polystyrene (sum of c) and d)) is more than 8% by weight, based on the insulation dry composition.
  • the insulation dry composition contains a hydraulic binder (a).
  • hydraulic binder for the interpretation of the term "hydraulic binder” applies in this document an expanded definition: in addition to the classically referred to as hydraulic binders
  • Substances namely those substances which can be hardened with water even under water ("hydraulic binder 'in CD Römpp Chemie Lexikon - Version 1.0, Stuttgart / New York, Georg Thieme Verlag 1995), are also the latent-hydraulic binder, namely which the binding of additives with water set ('latent hydraulic binder' in CD Römpp Chemie Lexikon - Version 1.0, Stuttgart / New York, Georg Thieme Verlag 1995), as well as such substances which react only in air with water ('nonhydraulisches binder' in CD Römpp Chemie Lexikon - Version 1.0, Stuttgart / New York, Georg Thieme Verlag 1995), referred to as hydraulic binders.
  • cements especially calcium sulfate, in the form of anhydrite, hemihydrate or dihydrate gypsum, or blast furnace slag, are also referred to as hydraulic binders.
  • the hydraulic binder is or contains at least one cement.
  • the cement is a cement according to Euronorm EN 197.
  • Preferred cements are Portland cements, sulfoaluminate cements and high-alumina cements, in particular Portland cement. Cements of cements can lead to particularly good properties. Particularly suitable are mixtures of at least one Portland cement with at least one Sulfoaluminatzement or at least one Tonerdeschmelzzement.
  • cementitious rapid binder preferably at least one alumina cement or other aluminate source, such as aluminate clinker, and optionally calcium sulfate, in the form of anhydrite, hemihydrate or dihydrate gypsum; and / or calcium hydroxide.
  • alumina cement or other aluminate source such as aluminate clinker
  • calcium sulfate in the form of anhydrite, hemihydrate or dihydrate gypsum
  • the proportion of the hydraulic binder, in particular of the cement is preferably 40-80% by weight, in particular 50-80% by weight, preferably 50-75% by weight, based on the insulation dry composition.
  • the proportion of the hydraulic binder, in particular of the cement is in particular limited to 100 kg / m 3 , preferably 80 kg / m 3 , of the water-based insulating dry composition upwards.
  • the insulating dry composition contains at least one dispersion plastic (b). Under a dispersion plastic is present throughout the
  • This copolymer is in particular a copolymer of at least two, preferably of two, different ethylenically unsaturated monomers, of which at least one comonomer, preferably all comonomers, are selected from the group comprising ethylene, butadiene, methacrylic acid, acrylic acid, methacrylic acid esters, acrylic acid esters , Styrene, vinyl acetate and acrylonitrile.
  • copolymers acrylic acid / styrene, methacrylic acid / styrene, styrene / butadiene and vinyl acetate / ethylene have generally been found to be suitable. However, under certain circumstances, it is advantageous to use vinyl acetate-free polymers.
  • acrylic acid / styrene and methacrylic acid / styrene copolymers are particularly preferred.
  • the dispersion resin typically has a molecular weight in the range between 30O00 and 10'OOOOOO g / mol, in particular between 100O00 and 5OOO 1 OOO g / mol. Particular preference is given to molecular weights of between 200,000 and 2,000,000 g / mol.
  • the particles of the dispersion plastic are in a finely divided aqueous plastic dispersion advantageously between 0.04 to 0.5 .mu.m, in particular between 0.1 to 0.2 .mu.m, or in a coarsely disperse aqueous
  • the dispersion plastic is preferably used in an amount of from 0.5 to 25, in particular from 0.5 to 15, preferably from 2 to 12,% by weight, dry matter, based on the hydraulic binder.
  • the mode of action of the dispersion plastic is essentially explained by the fact that the dispersion plastic particles have the adhesive strength of rigid, set binder hydraulic binder on the elastic foamed polystyrene particles significantly improved.
  • the binder layer which is only about 20-30 ⁇ m thick, does not detach on the granules even when the elastic spheres are compressed to a fraction of the original thickness.
  • the insulating dry composition contains at least polystyrene in the form of foamed polystyrene beads (c).
  • Foamed polystyrene beads are foamed in a known manner from expandable polystyrene, ie polystyrene, which contain a blowing agent, by heat treatment, in particular by hot steam.
  • This process is known per se and has long been used for the production of expanded polystyrene rigid foams (EPS), for example Styropor®, in particular in the production of EPS rigid foam boards, as they are mainly used for insulation.
  • EPS expanded polystyrene rigid foams
  • the degree of foaming and thus the raw bulk density of the foamed polystyrene beads can be varied by the process parameters in the foaming on demand.
  • the pearls have almost perfect spherical shape and are composed of closed foam cells.
  • the surfaces are intact except for small open pores which are distributed needle-like on the entire spherical surface. In particular, they have no damage caused by mechanical stress.
  • Foamed polystyrene beads which were merely foamed and not further processed, are also called new polystyrene.
  • a particularly preferred embodiment for foamed polystyrene beads is New Styrofoam®, ie Styrofoam®, which has merely been foamed and not further processed.
  • the insulating dry composition contains at least polystyrene in the form of foamed polystyrene granules with a surface damaged by mechanical stress (d).
  • foamed polystyrene beads In contrast to the foamed polystyrene beads mentioned above, these foamed polystyrene granules are not spherical but typically have a polyhedral shape. There are two embodiments which result in such foamed polystyrene granules.
  • foamed polystyrene granules of foamed polystyrene plates and / or molded parts, in particular of polystyrene packaging, by mechanical comminution, such as milling, can be obtained.
  • the fused together foam particles are torn apart, so that the surface has cracks, pockets and trailing edges.
  • This type can be obtained in particular from foamed polystyrenes, which are collected as waste, and is also referred to as recycled polystyrene.
  • a mechanical machining cracks and / or cracks in the surface In such a mechanical machining cracks and / or cracks in the surface.
  • Both the foamed polystyrene granules with a surface damaged by mechanical stress (d) and the foamed polystyrene beads (c) can be screened if necessary and so certain grain size distributions are achieved.
  • the particle size is between> 0 and 8 mm.
  • the proportion below 1 mm is preferably less than 10% by weight and the proportion above 2 mm is more than 75% by weight, since the binder requirement is additionally increased by smaller particles.
  • the amount of polystyrene in the form of foamed polystyrene beads and the polystyrene in the form of foamed polystyrene granules with a surface damaged by mechanical stress, ie the sum of c) and d), based on the insulation dry composition, is more than 8% by weight , preferably more than 10% by weight.
  • the proportion of polystyrene (sum of c) and d)) is between 15 and 45
  • % By weight, in particular between 15 and 40% by weight, preferably between 20 and 40% by weight, based on the insulation dry composition.
  • the polystyrene in the form of foamed polystyrene beads (c) or in the form of foamed polystyrene granules (d) has a bulk density between 8 and 20 kg / m 3 , in particular between 10 and 18 kg / m 3 , preferably between 12 and 18 kg / m 3 , up.
  • the insulating dry composition contains a mixture of polystyrene in the form of foamed polystyrene beads (c) to polystyrene in the form of foamed polystyrene granules (d) having a surface damaged by mechanical stress.
  • the weight ratio of polystyrene in the form of foamed polystyrene beads (c) to polystyrene in the form of foamed polystyrene granules (d) having a surface damaged by mechanical stress is in particular between 0.1 and 5, in particular between 0.2 and 3, preferably between 0.3 and 2.
  • the insulating composition can not be densified and smoothed by ordinary means, because the beads dodge due to their hardness and spherical shape, thus making densification in a large space impossible , In this compression state, the insulation is difficult to walk. Even if this insulating composition is sufficiently densified in a mold with great skill, the hardened insulation shows a high dynamic rigidity and is therefore unsuitable as impact sound insulation.
  • the binder content can not be reduced to the same extent due to the increased w / c value and the lower intrinsic strength of the polystyrene granules, as is the case when working with a mixture of c) and d).
  • the insulating dry composition further contains at least one water retention agent.
  • a “water retention agent” is defined throughout this document as follows:
  • a water retention agent is a substance which, according to a modified WoIf I I method, as explained below, has a water retention capacity of more than 85% for an organic water retention agent in one
  • the dosage of the substance to be tested for this test must be between 0.4% and 5% by weight for an organic water retention agent and between 12% and 15% for an inorganic water retention agent.
  • the dosage is between 0.4% and 5% by weight for the organic water retention agent and between 12% and 15% for the inorganic water retention agent.
  • the water release to the cellulose filter paper is determined by differential weighing of same before and after water absorption and recalculated to 100 g of cement paste. From the thus determined water release m x for the substance to be tested as water retention agent and m re / for the zero test, ie cement without substance, the water retention capacity (WRV) is determined according to the following formula.
  • the water retention agent may be an organic or an inorganic compound.
  • Inorganic water retention agents can typically be found in the multilayer silicates such as bentonite, smectite, montomorillonite, or even in calcined kaolins, in particular metakaolin. Metakaolin has proven to be a particularly suitable inorganic water retention agent.
  • Organic water retention agents are typically found in cellulose ethers, methylcelluloses, hydroxypropylmethylcelluloses, hydroxyethylcelluloses, carboxymethylcelluloses, and other cellulose derivatives, starch ethers, welan gum, or synthetic thickeners such as polyacrylic acid or PU acrylates.
  • Hydroxyalkylmethylcellulosen in particular hydroxypropyl methylcelluloses and Hydroxyethylmethylcellulosen shown.
  • the weight fraction of the sum of all water retention agents used depends strongly on the desired insulating and mechanical properties of the water-cured insulation dry composition and the water retention agent used, and typically ranges between 0.1 and 25% by weight, based on the hydraulic binder.
  • Inorganic water retention agents are advantageously used in a concentration of between 0.2 and 25% by weight, preferably between 0.5 and 9% by weight.
  • Binders in particular based on the cement used.
  • Water retention agents are advantageously used in a concentration between 0.1 and 9 wt .-%, preferably between 0.5 and 5 wt .-%, in particular between 0.7 and 4 wt .-%, based on the hydraulic binder, in particular based on the cement used.
  • organic water retention agents are particularly preferred.
  • the use of a water retention agent is advantageous in that it is possible to formulate insulating dry compositions which have a particularly small proportion of hydraulic binders and, above all, small amounts of water for rapid ready-to-use.
  • the advantageous effect of the water retention agent is explained by the fact that in the insulating materials of the prior art, the water used, which is required for the hydraulic curing of the cement, is usually absorbed by the foamed polystyrene to a considerable extent, so that at the surface of the setting of the hydraulic binder is disturbed, and therefore on the polystyrene foam surface no proper bond is formed. This is all the more pronounced the smaller the proportion of the hydraulic binder relative to the polystyrene and the smaller the amount of mixing water. This is greatly prevented by the use of water retention agents and the hydraulic binder forms after setting with the polystyrene foam surface an excellent bond, even if the proportion of the hydraulic binder is small compared to the polystyrene foam.
  • the use of the water retention agent makes it possible to use a small w / c factor (water / cement weight ratio) and thus a delay in the setting and deterioration of the mechanical properties can be largely prevented.
  • the insulation dry composition additionally comprises at least one filler which is not a foamed polystyrene, no hydraulic binder, no dispersion plastic and no water retention agent and the average particle size is chosen so that the ratio of average particle size of the filler to average particle size of the foamed polystyrene smaller 1, especially between 0.01 and 0.5, in particular between 0.02 and 0.25.
  • Such fillers may be elastic or rigid.
  • rigid fillers are glass beads, hollow glass beads, expanded glass beads, sand, quartz powder.
  • elastic fillers are in particular rubber or rubber, preferably in granular or powder form, into consideration. The use of these fillers is especially advantageous when a
  • Insulating material with a low proportion of hydraulic binder typically in the range of between 15 and 30 kg per m 3 of composition, to be achieved.
  • the insulating dry composition may contain special solid particles such as mica platelets, recycled scrap granules, water-absorbent plastic fibers, hydrophobic plastic particles such as Shreds of polyethylene or polypropylene films. These particles can intentionally introduce predetermined breaking points into the insulating material, which leads to lower dynamic stiffnesses, up to 5 MN / m 3 , and thus to better insulating properties, compared with the same compositions without these solid particles, without the mechanical load capacity is reduced too much.
  • the particle size is very much dependent on the individual composition or product requirements and must be determined in each case by the skilled person within the scope of his knowledge, or optimized.
  • the insulation dry composition may further contain other ingredients.
  • Such constituents are, for example, pigments, flame retardants, UV stabilizers, complexing agents, hardening and / or setting accelerators, film-forming aids, hardening and / or setting retarders, corrosion inhibitors, water repellents, air-pore formers, defoamers, dyes, surfactants, odorous substances or biocides.
  • the insulating dry composition is free of amorphous silica.
  • the dry bulk density of the insulating dry composition is preferably less than 110 kg / m 3 , in particular less than 100 kg / m 3 , preferably between 20 and 100 kg / m 3 .
  • An insulating material based on the technology of the prior art has - especially at lower cement content - a significantly poorer composite in the cured insulation, which means that when its loads, such as those caused by a walk, break the bonds between the granules and in Large quantities of foam granulate particles break out, and consequently the insulating material "crumbles".
  • the insulation-dry composition can with usual
  • Another aspect of the present invention is an insulation composition obtained from an above-described insulation dry composition and water.
  • the amount of water used depends strongly on the amount of hydraulic binder. If the hydraulic binder contains or consists of cement, in particular Portland cement, the amount of water is advantageously such that the water / cement ratio is from 0.2 to 3, in particular 0.3 to 2.5, preferably 0.3 to 1.5. The water / cement ratio may thus differ from that which the cement or concrete technologist usually applies.
  • Application ('dry mortar raw density') of the insulating composition is preferably less than 140 kg / m 3 , in particular less than 130 kg / m 3 , preferably between 45 and 120 kg / m 3 , most preferably between 45 and 100 kg / m 3 .
  • the insulation composition can be prepared immediately prior to application from the individual components or semi-finished products or it can be industrially manufactured and / or transported mixed to the location of the application.
  • the water is mixed with it immediately before application to Dämmstoffzusammen für or mixing the individual components thereof.
  • a plastic dispersion powder it can also be mixed with the hydraulic binder, if appropriate with the water retention agent and the foamed polystyrene, before the addition of water. It may prove to be advantageous if the water and the plastic dispersion are added not in one shot but in portions with stirring.
  • foamed foam granules are submitted, then the water, then the possibly present water retention agent, then the hydraulic binder and then the dispersion plastic, optionally mixed in the form of a dispersion.
  • the hydraulic binder is premixed with the possibly existing water retention agent and the dispersion plastic, then the binder is mixed with the water and finally the foamed polystyrene is added. It may also be advantageous here if the components are not added at one go, but in portions with stirring.
  • a further preferred variant of the preparation consists in first admixing the hydraulic binder, with which any water retention agent is present, some of the water and then this premix to the foamed polystyrene in at least two stages with metered addition of the water.
  • the mixing vessel is first charged with about three quarters of the total amount of polystyrene before the premixed binder content is added with the metered mixing water. Subsequently, or mixed with the mixing water, the dispersion plastic is added. The remaining polystyrene is then filled during the mixing process.
  • Another embodiment of the preparation is that the foamed polystyrene with the hydraulic binder, possibly present water retention agent and the dispersion plastic are mixed, and then the water is mixed.
  • the foamed polystyrene with the hydraulic binder, possibly present water retention agent and the dispersion plastic are mixed, and then the water is mixed.
  • Mixing advantageously carried out in a designed for compressed air delivery of the mixed mixing vessel. After the mixing process, the mixture can then be discharged by means of compressed air and transported via a hose to the place of introduction.
  • Another possibility for the production consists in the fact that the individual components in the correct ratio continuously metered and continuously mixed and conveyed in a short mixing section.
  • the insulation composition is placed between two different temperature materials and has the function of preventing the heat energy transfer between them. It is clear that therefore this insulation composition can be used on the one hand for thermal insulation or even for cold insulation.
  • the insulating materials thus produced have excellent insulating properties even in small layer thicknesses of a few centimeters.
  • another object of the present invention is an insulating material which is obtained from the previously described insulating dry composition after mixing with water, or from a previously described insulating composition after reaction of the hydraulic binder with water.
  • the described insulation dry composition is used in particular in the production of screed floor. In addition, however, it can also be used as filling cavities which are bounded by substantially vertically arranged surfaces.
  • An example of such an application is the isolation between two walls.
  • a screed floor construction typically takes place as shown schematically in FIG. 1 and FIG.
  • the mixed with water insulation dry composition is applied as Dämmstoffzusammenammmen- set 2 in a usual layer thickness between 5 and 10 cm.
  • layer thicknesses of 15 cm and more are introduced for thermal insulation in comparison with cellar ceilings and roof-terrace apartments.
  • the drying of insulation of the prior art extends to 3 - 9 weeks.
  • installation tubes 3 are present in the insulating layer. If such pipes are present, care must be taken to ensure that they are well wrapped by the insulation composition 2 so that no bridges for sound or heat energy can form.
  • a thin release film 6, usually made of polyethylene, and, if appropriate, underfloor heating pipes 4 may optionally be laid.
  • a cement screed 5 is applied. In order to achieve a good thermal and impact sound insulation, it must be ensured that the cement screed 5 or cover slips attached to it are always adequately insulated by further insulating materials 7 such as foam strips passing through the insulating layer 2 through pipes or conduits 9.
  • Such a separation layer with insulating properties is advantageously also in the wall area between wall 8, typically made of concrete or brick, and cement screed 5 to install.
  • the insulating layer also has the function of a leveling layer to compensate for unevenness in the floor and facilitates the installation of ducting and installation pipes. This is particularly important in renovation work, where for the insertion of the pipes and pipes of consuming and - especially in a concrete floor tedious step of sharpening or milled along the floor.
  • the greatly reduced weight compared to a conventional leveling ground, makes it possible to efficiently block even soils with a small load-bearing capacity.
  • the inventive insulation composition hardens with
  • Layer thickness of the cement is small and is typically less than 0.1 mm.
  • the density of the insulating material after setting and drying, ie after reaching the equilibrium moisture content, is preferably less than 120 kg / m 3 , in particular less than 100 kg / m 3 , preferably between 35 and 90 kg / m 3 .
  • the insulating composition has an amount of hydraulic binder of 15-35 kg / m 3 , in particular 15-30 kg / m 3 , based on the uncured insulation composition, characterized by very good impact sound and Thermal insulation.
  • This embodiment is mainly used in cases where primarily high to highest impact sound insulation and thermal insulation are required, and the requirements for the mechanical strength of the insulation material are lower.
  • insulating compositions of this embodiment shallleitrangeen ⁇ i O ° c, dry (dried, measured at 10 0 C average temperature in accordance with ⁇ Norm B 6015, Part 1) of ⁇ 0.038 W / m K possible.
  • the insulating composition has an amount of hydraulic binder of 35-50 kg / m 3 , in particular 40-50 kg / m 3 , based on the uncured insulation composition, characterized by extremely fast drying and excellent high mechanical strengths.
  • This embodiment is mainly used in cases where primarily highest load capacities and fastest accessibility are required, and the requirements for impact sound and thermal insulation are indeed present and required to a high, but not at the highest level.
  • insulation compositions thermal conductivities ⁇ io ° C, dry (dried, measured at 10 0 C average temperature based on ⁇ Norm B 6015, part 1) of ⁇ 0.043 W / mK possible.
  • the insulating composition has an amount of hydraulic binder of 30-45 kg / m 3 , in particular 30-40 kg / m 3 , based on the uncured insulating composition, characterized by greatly improved impact sound - And thermal insulation and greatly improved high mechanical strength.
  • This embodiment is mainly used in cases where a good mix of load capacity, fast accessibility and high demands on the impact sound and thermal insulation are required.
  • insulation compositions of this embodiment heat conduction capabilities .lambda..sub.i O ° C, dry (dried, measured at 10 0 C average temperature based on ⁇ Norm B 6015, part 1) possible of ⁇ 0.040 W / mK.
  • the insulating materials are already resilient after a short time.
  • the load capacity is usually determined by the accessibility. It can be achieved according to the invention insulating materials, which are already walkable after 1 day, sometimes even after 4 hours.
  • the insulation compositions are characterized by excellent processability coupled with a short shelf life.
  • ready-to-eat is understood to mean the time that elapses before an insulating material applied in such a manner can be overcoated, without the excess moisture in the insulating material giving rise to problems.
  • the limit value for the maximum permissible excess moisture for applications under floating floorings in residential and administrative buildings can be considered to be a thickness-independent value of 3 kg / m 2 . This excess moisture diffuses slowly through the building materials and caused experience, no damage. Depending on the layer thickness, this surface and non-volume-dependent limit thus requires different residual moisture per unit volume, which can be accepted when occupied.
  • Geseke Geseke
  • fast binder a ternary system
  • Fused alumina cement proportion:> 50% by weight
  • hemihydrate gypsum proportion:> 30
  • novel compositions (B1, B2) and comparison compositions (/ ef.7 to Ref. 5) were prepared according to Table 3.
  • the amounts of the water-mixed insulation compositions given there are based on kg / m 3 of the uncured wet mix.
  • the blends were prepared in a 10 liter Hobart mixer as follows. Foamed Polystyrene Beads (New Polystyrene) ("PSnew”) knife 3-6 mm; Bulk density 13 kg / m 3 , for example available from Flatzmaschineen-Styrofoorm GmbH, Germany) and foamed recycling polystyrene (“PS re cyi”) (diameter 0-8 mm, bulk density 13 kg / m 3 , available for example from JOMA Dämmstoffwerk GmbH, Germany) and the hydraulic binder with water retention agent and dispersion plastic were introduced, and then the water was added during the mixing. The mixture was mixed for 3 minutes, allowed to rest for 10 minutes and then compacted 20 ⁇ 20 ⁇ 8 cm under light site compaction 3 specimens of the above dimensions were produced and allowed to harden for 28 days.
  • PS re cyi foamed recycling polystyrene
  • the third sample 10 of each composition of Table 3 was coated with 8 cm of screed 11 and after 28 days the dynamic stiffness before and after 5 mm compression (compressed via servo-hydraulic compression testing machine as described above) was determined by swing-out test by determining the natural frequency of the sample.
  • the measuring arrangement is shown for this purpose in FIG. 3 and FIG.
  • the accelerometer "PSB 302B03" 12 was placed on the screed layer 11. Vibrations were then induced into the insulating material by means of a light impact with an impact hammer 13, which was detected by the accelerometer and recorded in the FFT analyzer "AND AD-3524 FFT Analyzer” 14 were further processed. This made it possible to determine the natural frequency of the insulating material, from which the dynamic stiffness Q [MN / m 3 ] is calculated as follows: _ (2 ⁇ f) 2 md ⁇ A with
  • the processability is judged qualitatively over a rating of 1 (very good) to 5 (very bad).
  • the composition of the insulating material has no pressure point during application and the foamed polystyrene diffuses and does not undergo the necessary compaction.
  • good processing however, a pressure point is present and a leveling by peeling by means of beidekanteter Metallatte is possible.
  • grading 5 further deduction by means of Abziehlatte is not possible because no flat and hardened surface is obtained.
  • the accessibility was determined by placing a point load of 0.2 kN on a round contact surface of 50 cm 2 over a period of 120 seconds and a measurement of the deformation checked The walkability is given at the time when the deformation under load is less than 3 mm.
  • Some building physicists usually specify a limit value based on the square meter ceiling construction with 3 kg / m 2 excess moisture.
  • the maturity is reached for the first time at the time x, in which the amount of excess water m U x ⁇ 120 g (corresponding to ⁇ 3 kg / m 2 ) and is shown in Table 4 as "ready-made" x in days (d).
  • Comparative Examples Ref. 1 to Ref. 3 and Ref. 5 use recycled polystyrene only, while Comparative Example Ref. 4 uses only virgin polystyrene.
  • the example B1 shows in comparison to Ref. 2 despite 12.5% lower binder content about 50 to 70% higher load capacity.
  • a further advantage of B1 is the maturity of 1 day instead of 13 days at ref. 2. B1 even exceeds ref. ⁇ , Which contains about 53% more binders in terms of strength and ready-to-use.
  • Examples B1 and B2 show the potential for improving the strength while maintaining the binder content or the thermal conductivity (over lower binder content) with the same strength and improved sound-absorbing properties and at the same time with greatly reduced drying time.

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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)

Abstract

La présente invention concerne d'une part une composition isolante sèche destinée à fabriquer un isolant thermique et de bruits de pas. Ces compositions isolantes sèches présentent une faible teneur en liant hydraulique, une matière synthétique de dispersion ainsi qu'une forte teneur de polystyrène sous forme de perles de polystyrène moussé et de granulé de polystyrène moussé. La composition isolante sèche et la composition isolante additionnée d'eau conviennent extrêmement bien pour réaliser des isolants thermiques et de bruits de pas, en particulier pour des planchers. Elles sont caractérisées par des propriétés extrêmement élevées d'isolation thermique et de bruits de pas ainsi que par la possibilité d'y marcher rapidement après leur pose, c'est-à-dire par de courtes durées de maturation après pose.
EP08774685A 2007-07-03 2008-07-03 Isolant thermique et de bruits de pas à faible teneur en liant hydraulique et forte teneur en polystyrène moussé Withdrawn EP2164815A1 (fr)

Priority Applications (1)

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EP08774685A EP2164815A1 (fr) 2007-07-03 2008-07-03 Isolant thermique et de bruits de pas à faible teneur en liant hydraulique et forte teneur en polystyrène moussé

Applications Claiming Priority (3)

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EP07111642A EP2014625A1 (fr) 2007-07-03 2007-07-03 Matière isolant de chaleur et des bruits de chocs à faible teneur en liant hydraulique et à teneur élevée en polystyrène expansée
EP08774685A EP2164815A1 (fr) 2007-07-03 2008-07-03 Isolant thermique et de bruits de pas à faible teneur en liant hydraulique et forte teneur en polystyrène moussé
PCT/EP2008/058558 WO2009004049A1 (fr) 2007-07-03 2008-07-03 Isolant thermique et de bruits de pas à faible teneur en liant hydraulique et forte teneur en polystyrène moussé

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EP2164815A1 true EP2164815A1 (fr) 2010-03-24

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EP08774685A Withdrawn EP2164815A1 (fr) 2007-07-03 2008-07-03 Isolant thermique et de bruits de pas à faible teneur en liant hydraulique et forte teneur en polystyrène moussé

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HUP1000155A2 (en) * 2010-03-22 2011-10-28 Iglu Bricks Fejlesztoe Es Epitoeipari Kft Building material
CN101914987A (zh) * 2010-09-13 2010-12-15 天津天一建设集团有限公司 地采暖纤维钢筋混凝土地面施工方法
CN101955627B (zh) * 2010-09-14 2013-03-06 王锐 隔热保温材料及使用该材料制备隔热保温壳的方法
JP6034872B2 (ja) * 2011-10-28 2016-11-30 ダウ グローバル テクノロジーズ エルエルシー セメント組成物のための再分散性ポリマー粉末とのポリウレタン粉末ブレンド
FR2992640B1 (fr) * 2012-06-27 2016-01-29 Vicat Nouveau materiau de construction comprenant un granulat vegetal
AT515534B1 (de) * 2014-03-25 2015-10-15 Edler Alois Schüttfähige Mischung zur Bildung einer thermischen Dämmschicht
CN106400991A (zh) * 2016-09-23 2017-02-15 济南大学 一种水泥渗透包裹聚苯颗粒a级防火保温板及其制作方法
GB2585946A (en) * 2019-07-26 2021-01-27 Mccrea Brendan Screed composition and method of use
GB2589617A (en) * 2019-12-05 2021-06-09 Mccrea Brendan Building structure and method of construction

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EP1510507A1 (fr) * 2003-08-26 2005-03-02 Sika Plastiment GmbH A faible taineur en liant
EP1510508A1 (fr) * 2003-08-26 2005-03-02 Sika Plastiment GmbH Matériau d isolation thermique et phonique à faible taineur en liant
DE102004043837A1 (de) * 2004-09-08 2006-03-30 Basf Ag Wärme- und schalldämmende Bodenausgleichsschüttung

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