EP0694101A1 - Sound absorbent material - Google Patents
Sound absorbent materialInfo
- Publication number
- EP0694101A1 EP0694101A1 EP94913648A EP94913648A EP0694101A1 EP 0694101 A1 EP0694101 A1 EP 0694101A1 EP 94913648 A EP94913648 A EP 94913648A EP 94913648 A EP94913648 A EP 94913648A EP 0694101 A1 EP0694101 A1 EP 0694101A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- approximately
- particles
- advantageously
- material according
- binder
- 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.)
- Granted
Links
- 239000000463 material Substances 0.000 title claims abstract description 92
- 230000002745 absorbent Effects 0.000 title claims abstract description 46
- 239000002250 absorbent Substances 0.000 title claims abstract description 46
- 239000004570 mortar (masonry) Substances 0.000 claims abstract description 33
- 239000002245 particle Substances 0.000 claims abstract description 31
- 239000011230 binding agent Substances 0.000 claims abstract description 18
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 10
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 6
- 239000011707 mineral Substances 0.000 claims abstract description 5
- 239000003570 air Substances 0.000 claims description 12
- 150000001875 compounds Chemical class 0.000 claims description 10
- 239000011521 glass Substances 0.000 claims description 6
- 229920005749 polyurethane resin Polymers 0.000 claims description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- 239000000835 fiber Substances 0.000 claims description 5
- 239000011490 mineral wool Substances 0.000 claims description 5
- 238000009826 distribution Methods 0.000 claims description 4
- 239000006260 foam Substances 0.000 claims description 4
- 239000011491 glass wool Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 229920000647 polyepoxide Polymers 0.000 claims description 4
- 230000035939 shock Effects 0.000 claims description 4
- 229920000178 Acrylic resin Polymers 0.000 claims description 3
- 239000004593 Epoxy Substances 0.000 claims description 3
- CERQOIWHTDAKMF-UHFFFAOYSA-M Methacrylate Chemical compound CC(=C)C([O-])=O CERQOIWHTDAKMF-UHFFFAOYSA-M 0.000 claims description 3
- 238000005299 abrasion Methods 0.000 claims description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 3
- 239000004744 fabric Substances 0.000 claims description 3
- 239000003365 glass fiber Substances 0.000 claims description 3
- 229920001225 polyester resin Polymers 0.000 claims description 3
- 229920002635 polyurethane Polymers 0.000 claims description 3
- 239000004814 polyurethane Substances 0.000 claims description 3
- 239000012209 synthetic fiber Substances 0.000 claims description 3
- 229920002994 synthetic fiber Polymers 0.000 claims description 3
- 229920003043 Cellulose fiber Polymers 0.000 claims description 2
- 102100026891 Cystatin-B Human genes 0.000 claims description 2
- 101000912191 Homo sapiens Cystatin-B Proteins 0.000 claims description 2
- 235000019738 Limestone Nutrition 0.000 claims description 2
- 229920000877 Melamine resin Polymers 0.000 claims description 2
- 239000004698 Polyethylene Substances 0.000 claims description 2
- 238000005054 agglomeration Methods 0.000 claims description 2
- 230000002776 aggregation Effects 0.000 claims description 2
- 239000004927 clay Substances 0.000 claims description 2
- 239000002657 fibrous material Substances 0.000 claims description 2
- 239000006028 limestone Substances 0.000 claims description 2
- 239000004579 marble Substances 0.000 claims description 2
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 claims description 2
- 239000000025 natural resin Substances 0.000 claims description 2
- -1 polyethylene Polymers 0.000 claims description 2
- 229920000573 polyethylene Polymers 0.000 claims description 2
- 239000010453 quartz Substances 0.000 claims description 2
- 239000000377 silicon dioxide Substances 0.000 claims description 2
- 239000010935 stainless steel Substances 0.000 claims description 2
- 229910001220 stainless steel Inorganic materials 0.000 claims description 2
- 229920003002 synthetic resin Polymers 0.000 claims description 2
- 239000000057 synthetic resin Substances 0.000 claims description 2
- 239000011358 absorbing material Substances 0.000 claims 1
- 229920005989 resin Polymers 0.000 description 16
- 239000011347 resin Substances 0.000 description 16
- 239000000203 mixture Substances 0.000 description 13
- 238000010521 absorption reaction Methods 0.000 description 12
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 9
- 238000005253 cladding Methods 0.000 description 7
- 239000002131 composite material Substances 0.000 description 5
- 238000004132 cross linking Methods 0.000 description 5
- 230000002787 reinforcement Effects 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000002557 mineral fiber Substances 0.000 description 3
- 239000007789 gas Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 206010011878 Deafness Diseases 0.000 description 1
- 229910001335 Galvanized steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000006757 chemical reactions by type Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000008397 galvanized steel Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 125000002524 organometallic group Chemical group 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
- 210000002268 wool Anatomy 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
- E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
- E04B1/84—Sound-absorbing elements
- E04B1/86—Sound-absorbing elements slab-shaped
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F15/00—Flooring
- E04F15/18—Separately-laid insulating layers; Other additional insulating measures; Floating floors
- E04F15/20—Separately-laid insulating layers; Other additional insulating measures; Floating floors for sound insulation
- E04F15/206—Layered panels for sound insulation
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
- E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
- E04B1/84—Sound-absorbing elements
- E04B2001/8457—Solid slabs or blocks
- E04B2001/8461—Solid slabs or blocks layered
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
- E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
- E04B1/84—Sound-absorbing elements
- E04B2001/8457—Solid slabs or blocks
- E04B2001/8476—Solid slabs or blocks with acoustical cavities, with or without acoustical filling
Definitions
- the invention relates to an acoustic absorbent material in particular in the form of a plate or slab.
- acoustic absorbent material means any material which makes it possible, in particular when placed on a wall, to increase the part of the sound wave which is absorbed by reducing the reflected part.
- acoustic correction such as coverings or acoustic absorbent screens
- sound wave absorbent products or acoustic absorbent products
- tiles or cladding panels known to date are made up either of agglomerated aggregates, or of agglomerated wood chips, or of mineral or synthetic fibers or of foams covered with a decorative fabric or of paint, or of perforated metal boxes filled with mineral fibers.
- the well-known technique of cladding consists in coming to fix before an existing wall to be treated, cladding plates on a frame (metal profile for example).
- the plenum thus formed between the wall and the cladding plate is generally filled with mineral wool.
- absorbent materials rarely combine the qualities of use required by wall acoustic absorbents, namely acoustic absorption, acoustic transparency, mechanical resistance and aesthetics. They are in fact either poor in absorption or acoustic transparency, or fragile and unsightly.
- the product known under the name "COUSTONE” consisting of a homogeneous mortar is fragile and brittle
- the product known under the SOVETAC name consisting of aggregates agglomerated on a plate of densified mineral fibers is fragile and not very transparent acoustically.
- the object of the present invention is precisely to provide acoustic absorbent materials, allowing an acoustic absorption equivalent to or even greater than that of the materials currently known in this field, while retaining the properties of being transparent acoustics, mechanically resistant and aesthetic.
- the subject of the present invention is an acoustic absorbent material comprising particles of mineral origin linked together by a binder at their only points of contact with each other, so that the surfaces
- the particles delimit spaces allowing the circulation of air through the material (also designated by the expression "air voids"), making the aforesaid material porous, said particles, binder and air voids being distributed homogeneously throughout said material, that is to say that the distribution of particles in the air voids and the binder, is substantially identical for each volume of one cm 3 of material.
- FIG. 1 shows an elevational view of an acoustic panel 1 made from a reinforced material according to the invention, and a corner of which is exploded;
- FIG. 2 shows a section through 11-11 of Figure 1 of the slab 1 of the invention; the absorbent mortar 2 surrounds the reinforcement 3 forming a framework for the mortar 2;
- - Figure 3 shows an elevational view of an Ibis acoustic panel made from a material composed according to the invention comprising an absorbent core 4;
- FIG. 4 shows a section through II-II of Figure 3 of the Ibis panel according to the invention; the absorbent mortar 2 surrounds the absorbent core 4 placed on the reinforcing element 3 forming a laminated reinforcement in the mortar 2.
- the particles of mineral origin contained in the material according to the invention are advantageously gravels, in particular gravels of rolled or crushed quartz or aggregates of silica, or of limestone (in particular of marble), or beads or shards of glass , or clay balls, crushed or not, and the particle size of which is preferably from approximately 0.1 mm to approximately 10 mm, in particular from approximately 0.1 mm to approximately 5 mm, or alternatively approximately 0, 3 mm to approximately 3 mm, in particular approximately 0.5 mm to approximately 2.5 mm, preferably from about 0.5 mm to about 1.25 mm, or from about 0.5 mm to about 1 mm, or preferably also from about 1 mm to about 2 mm.
- the above-mentioned particles have substantially the same particle size.
- the binder is a natural or synthetic resin, in particular chosen from methacrylate, epoxy, acrylic, polyester or polyurethane resins.
- the distribution of the particles, the binder and the air voids for each volume of one cm 3 of the material according to the invention is advantageously as follows: - particles (% by volume): approximately 50% to approximately 80%, preferably about 55% to about 70%,
- - binder (% by weight relative to the weight of the particles): approximately 1% to approximately 35%, in particular approximately 2% to approximately 10%, preferably approximately 4% to approximately 8%, - air voids (% by volume ): about 20% to about 50%, especially
- the material according to the invention has an apparent density of approximately 100 to approximately 2000 kg / m 3 , or alternatively of approximately 1000 to approximately 1700 kg / m 3 , in particular approximately 1400 kg / m 3 to approximately
- the aforementioned material is in the form of plates or slabs with a thickness of about 8 mm to about 50 mm, advantageously from about 16 mm to about 30 mm.
- the tiles according to the invention can be in flat and smooth form, or can be flat and sculpted, in particular by hollows, ribs, bumps, etc.
- the presence of sculptures on the slabs of the invention is likely to increase their surface and therefore their acoustic absorption capacity.
- the invention relates more particularly to any material as described above, and having:
- an abrasion resistance such that a loss of volume of about 0.01 cm 3 to about 5 cm 3 , in particular from about 0.01 cm 3 to about 1 cm 3 , advantageously about 0.01 cm 3 to approximately 0.5 cm 3 , or alternatively from 0.01 cm 3 to approximately 0.1 cm 3 , in particular from 0.045 to 0.06 cm 3 , according to the DIl method described in the "Directives UEAtc Approval "(CSTB booklet no. 2182, September 1987), - impact resistance such as:
- the invention also relates to a reinforced material comprising a material as described above, according to the invention, and one or more reinforcing element (s), made of woven or non-woven material, embedded in the mortar of the material. formed by the agglomeration of the particles with the binder, this reinforcing element being chosen in particular from glass fibers, synthetic fibers, metallic fabrics or made of stainless or galvanized steel, said reinforcing element advantageously being a glass grid with meshes of the order of about 4 to about 10 mm.
- This frame which advantageously has the same surface as the slab according to the invention, and which is linked by the resin for coating the gravel with which they form a laminate, contributes to ensuring impact resistance and mechanical resistance. absorbent materials according to the invention.
- this reinforcing element in particular woven or grid
- meshes of a size compatible with the particle size of the gravels of the mortar In the case of the gravel described above, it is possible to provide meshes of the order of 4 to 10 mm.
- the weight is of the order of 160 to 250 g per m 2 .
- the adequacy of the particle size of the gravel of the mortar with the reinforcing mesh gives the cladding plate according to the invention, the property of being able to be cast or screwed onto the frame of the cladding without pilot hole.
- the subject of the invention is also any compound material comprising one or more acoustic absorbent core (s) in cavities arranged for this purpose inside a material, in particular reinforced, as described above. top according to the invention, this absorbent core being chosen in particular from fibrous materials such as glass or rock fibers, glass or rock wool, or cellulose fibers, or fibers of animal origin, or acoustic absorbent foams such as melamine polyurethanes or open cell polyethylene etc., in general, any acoustic absorbent material.
- fibrous materials such as glass or rock fibers, glass or rock wool, or cellulose fibers, or fibers of animal origin
- acoustic absorbent foams such as melamine polyurethanes or open cell polyethylene etc.
- the compound material according to the invention (or even composite acoustic panel) comprises:
- the core is made of fibers or wool of glass or rock.
- the core can be in the form of a plate 5 to 20 mm thick. It may in particular be the product known under the name "Stratiglass” sold by the company ISOVER SAINT GOBAIN.
- the density of this insulating core can be 150 kg per m 3 . It can be glass wool or rock wool.
- the acoustic absorbent core by virtue of its fiber or foam composition, gives the acoustic panel a non-negligible complementary power of thermal insulation.
- the compound material according to the invention is in the form of plates or slabs with a thickness of approximately 4 mm to approximately 40 mm, advantageously from approximately 10 mm to approximately 30 mm, in particular 13 mm to 28 mm, and an apparent density advantageously between 800 kg / m 3 and 1500 kg / m 3 , in particular from 1100 kg / m 3 to 1200 kg / m 3 .
- the thickness of the absorbent core within the material is from about 5 to about 16 mm.
- the volume of the absorbent core represents approximately 20 to approximately 30% of the volume of the material, in particular when the latter is in the form of a slab.
- the compound materials according to the invention advantageously have abrasion and impact resistance as described above in the case of the above-mentioned acoustic absorbent materials.
- the invention also relates to the use of all materials as described above, as acoustic absorbents, in particular when they are placed on walls, ceilings or floors of any premises, or even on exterior walls. of buildings or other constructions.
- the preparation of an acoustic absorbent material according to the invention is carried out by introducing into a mold of the same size as that of the slab or plate which it is sought to obtain, a layer of mortar made up of gravel, pigmented or not, added resin. Then let crosslink. Time to crosslinking depends, in particular on the crosslinking temperature for the resin used.
- a first layer of mortar consisting of gravel, pigmented or not, added with resin, is introduced into the mold of the same size as the slab provided, the grid is then placed. 3 on a first layer and, if necessary, in the middle of this grid 3, the absorbent core 4 is laid, of dimensions slightly smaller than the total dimensions of the slab, and the whole is covered with a second layer of the same mortar 2 or a mortar of different composition, also filling the gaps left free all around the absorbent core 4.
- holes with a diameter of about 2.5 cm to about 5 cm are arranged in the absorbent core so that the two walls of mortar surrounding the absorbent core are connected by mortar "bridges" during the aforementioned step of covering with the second layer of mortar.
- the gravel is wrapped in resin, colorless or colored, in order to be agglomerated and to form a mortar.
- Such mortars are described in patent FR 2 622 223 and known under the name "CHROMOROC”.
- the gravel used can also be calcined which allows them to be of an excellent whiteness.
- the mortar can be prepared from gravel coming from a mixture of gravel, natural or pigmented by coating with colored resin.
- any resin capable of agglomerating and hardening the mortar can be used, for example methacrylate, epoxy, acrylic, polyester or polyurethane resins mentioned above.
- polyurethane resins are used.
- the binder and in particular when it is a polyurethane is present in the mortar at concentrations of the order of 3 to 15% by weight, and preferably from 5.5 to 8.5%, in particular from 7.5 to 8 , 5% by weight relative to the total weight of the mortar.
- a first layer of mortar as described above is added with a resin, in particular a polyurethane resin, capable of hardening slightly during the crosslinking step, then, if necessary, the grid 3 and / or absorbent core are placed on this first layer, and the whole is covered with a second layer of mortar added with a resin, in particular an epoxy resin, capable of hardening considerably during the crosslinking step.
- a resin in particular a polyurethane resin
- the absorbent materials thus obtained therefore have, on one of their faces, a hard layer of mortar which is particularly impact-resistant, while the opposite face consists of a layer of mortar which is more flexible than the previous layer, the latter layer being capable of '' further improve the absorbency of the material, as well as its resistance to weathering over time, and to ultraviolet rays (and therefore its aesthetics).
- the aforementioned materials are such that the "hard” layer represents approximately two thirds of the thickness of the materials, while the “flexible” layer represents approximately one third of this thickness.
- the surface of the material according to the invention which is made up of a flexible layer of mortar as described above will be that facing the ambient environment, while the opposite face made up of a layer hard mortar as described above, will be that facing the wall on which said material is intended to be fixed.
- a crosslinking catalyst can be used, such as organometallic derivatives in the case of polyurethane resin.
- various additives can be incorporated which can give the mortar properties related to aesthetics, to the final color with properties of resistance to heat or fire.
- slabs of composite material according to the invention come in dimensions suitable for their use and, simply by way of example, slabs of
- slabs of the invention are extremely easy, insofar as their mechanical strength is high and their light weight, in particular for slabs made from composite materials according to the invention. They can be laid in the conventional way and in particular by direct bonding and by mechanical fixing and in particular by laying on a wooden or metal frame, either by nailing or screwing with or without pilot hole, or by insertion into a network of profiles.
- the slabs according to the invention have the advantage of being of great mechanical strength, the latter being conferred in particular by the presence of a reinforcement and by the symmetrical three-layer laminate structure, for those made of composite material according to the invention.
- the appearance is modular, in color and in particle size, by the choice of material, colored, neutral, mixed.
- the invention also relates to the above-mentioned acoustic absorbent materials, where appropriate reinforced and / or compounds, having the property of being non-flammable (materials classified Ml)
- the aforementioned non-flammable materials are more particularly characterized in that they are obtained from binders, in particular the aforementioned resins, comprising alumina AI2O3, 3H2O.
- the resin-alumina mixture used to obtain materials M1 according to the invention is advantageously such that the amount of alumina present in said mixture represents approximately one to approximately twice the weight of the resin in said mixture.
- the invention also relates to acoustic absorbent materials as described above, having the property of being noncombustible (materials classified MO).
- the resin-alumina mixture used to obtain MO materials according to the invention is advantageously such that the amount of alumina present in said mixture represents approximately two to approximately three times the weight of the resin in said mixture.
- the present invention also relates to the compositions comprising alumina in admixture with one or more resin (s) in the abovementioned proportions.
- the alumina included in the abovementioned compositions comprises a mixture of particles of different size, ranging from approximately 500 ⁇ for the largest, to approximately l ⁇ for the smallest.
- the above-mentioned mixture of alumina particles is such that it comprises approximately two parts of large particles (approximately 500 ⁇ ), for one part of medium-sized particles (approximately 80 ⁇ to approximately 100 ⁇ ), and for one part small particles (about l ⁇ to about 5 ⁇ ).
- large particles approximately 500 ⁇
- medium-sized particles approximately 80 ⁇ to approximately 100 ⁇
- small particles about l ⁇ to about 5 ⁇ .
- the materials are subjected to radiation tests consisting in subjecting, under defined conditions, test specimens (containing a fraction of the materials) to the action of a radiant heat source and possibly causing ignition of the gases released. , and propagation of combustion.
- the test tube (30 x 40 cm) arranged at 45 °, is subjected to a defined radiation, emitted by an electric radiator whose surface is 3.0 cm below the plane of the test tube.
- the gases released pass into contact with igniters arranged on either side of the test tube.
- Each test lasts 20 minutes.
- Combustible materials are classified Ml, M2, M2 and M4. Only materials classified Ml can claim MO classification (Higher Calorific Power ⁇ 2500 kJ / kg, i.e. 600 kcal / kg).
- the sound absorption properties of the materials according to the invention are excellent compared to those of the usual slabs known for both high-pitched sounds and for mediums and basses.
- a slab of composite material according to the invention also designated CHROMOROC ALPHA; classified product Ml, with a total thickness of 24 mm, comprising an "Stratiglass” acoustic core with a thickness of 10 mm between two layers of mortar of 6 mm and 8 mm respectively
- a coefficient Alpha-S (as) higher than 0.75 from 125 to 5000 Hz.
- the coefficient Alpha- S is greater than 0.75 from 1000 to 5000 Hz.
- CHROMOROC ALPHA and CHROMOROC ALPHA ROUTE products have a sound absorption coefficient as significantly higher than that of the COUSTONE product in the low frequencies.
- CHROMOROC ALPHA product has a sound absorption coefficient as significantly higher than that of the SOVETAC product in low frequencies and high frequencies.
- the absorption coefficient as expresses the ratio between the sound energy which strikes the surface of a product and that which it reflects. This coefficient is measured in the laboratory by frequency, and characterizes the acoustic absorption of a ri ⁇ of the product under consideration.
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Electromagnetism (AREA)
- Building Environments (AREA)
Abstract
Description
Claims
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9304390 | 1993-04-14 | ||
FR9304390A FR2704015B1 (en) | 1993-04-14 | 1993-04-14 | Acoustic panel. |
FR9306970A FR2706174B1 (en) | 1993-06-08 | 1993-06-08 | Acoustic absorbing cladding plate. |
FR9306970 | 1993-06-08 | ||
PCT/FR1994/000420 WO1994024381A1 (en) | 1993-04-14 | 1994-04-14 | Sound absorbent material |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0694101A1 true EP0694101A1 (en) | 1996-01-31 |
EP0694101B1 EP0694101B1 (en) | 1997-11-19 |
Family
ID=26230246
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP94913648A Expired - Lifetime EP0694101B1 (en) | 1993-04-14 | 1994-04-14 | Sound absorbent material |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0694101B1 (en) |
AU (1) | AU6572094A (en) |
DE (1) | DE69406913T2 (en) |
WO (1) | WO1994024381A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ES2291139A1 (en) * | 2007-06-19 | 2008-02-16 | Marcel Fontanillas Gusiñe | Frontage for noise-absorbing buildings, has main component and sound absorbent foreign plates, crushed aggregate base, configuration and variable volume for grains, which are linked to each other through resin |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19653930A1 (en) * | 1996-12-21 | 1998-06-25 | Wilhelmi Werke Ag | Sound absorbing building board |
US5765334A (en) * | 1997-02-12 | 1998-06-16 | Vitous; Miroslav L. | Method of manufacturing porous building materials |
FR2774107B1 (en) | 1998-01-28 | 2000-04-28 | Pic Conseil | ACOUSTIC SHOCK ABSORBER FACING FOR NOISE WALL |
DE102005029356A1 (en) * | 2005-06-24 | 2007-01-04 | Eudur-Bau Gmbh & Co. Kg | Sound barrier |
AT510977B1 (en) | 2010-12-23 | 2012-08-15 | Kirchdorfer Fertigteilholding Gmbh | ACOUSTIC COMPONENT |
JP6539850B2 (en) * | 2014-12-12 | 2019-07-10 | 昭和電工株式会社 | Method of manufacturing structure |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2021359A (en) * | 1932-10-19 | 1935-11-19 | Dorne N Halstead | Preformed sound-absorbing unit and method of making the same |
FR1473345A (en) * | 1966-02-15 | 1967-03-17 | Prefabricated partition providing sound and thermal insulation | |
JPS49108808A (en) * | 1973-02-17 | 1974-10-16 | ||
DE3916799A1 (en) * | 1989-05-23 | 1990-11-29 | Sto Poraver Gmbh | SOUND ABSORPTION PANEL |
DE9000994U1 (en) * | 1990-01-30 | 1990-04-26 | Kerapid Krüger und Schütte KG, 3200 Hildesheim | Prefabricated, transportable, self-supporting building element, such as a panel, wall or molded part, with ceramic tiles on both sides |
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1994
- 1994-04-14 WO PCT/FR1994/000420 patent/WO1994024381A1/en active IP Right Grant
- 1994-04-14 DE DE69406913T patent/DE69406913T2/en not_active Expired - Fee Related
- 1994-04-14 EP EP94913648A patent/EP0694101B1/en not_active Expired - Lifetime
- 1994-04-14 AU AU65720/94A patent/AU6572094A/en not_active Abandoned
Non-Patent Citations (1)
Title |
---|
See references of WO9424381A1 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ES2291139A1 (en) * | 2007-06-19 | 2008-02-16 | Marcel Fontanillas Gusiñe | Frontage for noise-absorbing buildings, has main component and sound absorbent foreign plates, crushed aggregate base, configuration and variable volume for grains, which are linked to each other through resin |
Also Published As
Publication number | Publication date |
---|---|
WO1994024381A1 (en) | 1994-10-27 |
DE69406913D1 (en) | 1998-01-02 |
DE69406913T2 (en) | 1998-05-28 |
EP0694101B1 (en) | 1997-11-19 |
AU6572094A (en) | 1994-11-08 |
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