Vibrodempping insert for hollow core elements of building structures
SUBSTANCE: invention relates to construction and may be used for vibration isolation, sound insulation in enclosed spaces when installing and installing ventilation units, compressors, generators and other equipment. This is achieved by the fact that the vibration damping insert for hollow elements of building structures, for example for the construction of a floor on an elastic base, is made in the form of a cylinder of rigid vibration damping material, inside which an elastic core is axially symmetric and coaxial, along the axis of which is rigidly fixed along the entire length of the cavity, damping disks, herewith the extreme discs are fixed "aflush" with the cylinder from a vibrodamping material, the ends of which, in turn, are placed "aflush" with side surfaces of the base plate.
EFFECT: increase in the vibration-absorbing and sound-insulating properties of the floor.
4 cl, 3 dwg
SUBSTANCE: in the method to manufacture a mineral board, where they mix and homogenise initial raw water suspension in a raw materials tank, containing mineral fibre, a filler, binding substances, they feed and distribute the produced initial raw water suspension on a moving latticed conveyor, the initial raw water suspension is dehydrated using a self-flow gravity drainage and vacuum drainage to produce the main wet mat, the main wet mat is dried and shaped, additional treatment of the main mat is performed, and additional coatings are applied onto the surface of the dried main mat, they mix and homogenise the initial raw water suspension in the raw materials tank, which contains mineral fibre in the amount of 30-80%, a filler containing swollen perlite in the amount of 5-40%, clay in the amount of 5-30% at if required calcium carbonate in amount of not more than 20%, binding substances, which include starch in amount of 2-11% and if required cellulose binder in the form of paper in amount of not more than 10% of the total mass of dry solid substances of the board, they mix and homogenise in the additional raw materials tank the additional raw water suspension, containing liquid glass in the amount of 0.5-15% and/or thermosetting binder in the amount of 0.5-10% and if required clay in the amount of not more than 25% on the basis of total clay content in the mineral board equal to 5-30% and/or starch in the amount of not more than 9% on the basis of the total content of starch in the mineral board 2-11%, they apply the prepared water suspension in the form of foam with the help of a foam generator on the main wet mat with dehydration of the initial raw water suspension using vacuum drainage. At the same time in the mineral board local concentrations of components introduced as foam are gradually reduced along the thickness of the board in direction from the face to the rear side of the board, and local density of the board gradually decreases along the board thickness in direction from the rear to the face side of the board, and its value on the rear side of the board is not more than 1.2 times higher than its value on the face side of the board.
EFFECT: reduced energy costs for manufacturing of mineral boards and possibility to produce boards with improved quality characteristics.
2 cl, 3 dwg, 1 tbl
SUBSTANCE: multi-layer acoustic panel comprises a frame and a sound-absorbing board placed in its inner cavity. The frame is made in the form of a parallelepiped formed by front and rear walls, each "П"-shaped, with side ribs. Besides, on the walls there is slot perforation, made in the form of rectangles and arranged in rows with width of rows b1 and b2 and distance between them h1 and h2. Adjacent rows are arranged with displacement, and the number of slots in one row is even, and in the other one - odd, the perforation coefficient is accepted as equal or more than 0.25. There is a sound-absorbing board placed between front and rear walls of the frame. Walls of the panel are fixed to each other on top and bottom by vibration damping covers, which may be arranged with cells and be "П"-shaped. Front and rear walls of the frame may be made of stainless steel or galvanised sheet with thickness of 0.7 mm with a polymer protective-decorative coating of "Pural" type with thickness of 50 mcm or "Polyester" with thickness of 25 mcm, or from an aluminium sheet with thickness of 1.0 mm and with coating having thickness of 25 mcm. The sound-absorbing board comprises two perforated surfaces, between which two layers of sound-absorbing material are placed, adjoining the perforated surfaces and made of soft solid and shaped sound absorber, in which sound reflection coefficient is less than the sound absorption coefficient. Profiles of layers are formed by spherical surfaces, connected to each other so that as a whole each profile forms a solid dome-shaped profile, which focuses the reflected sound. Interrupted sound-absorbing layers arranged in focus of solid profiled layers, are made in the form of solids of revolution, for instance, in the form of balls, and are fixed with the help of rods parallel to perforated surfaces, which are stiffly connected to them by means of vertical fastening elements perpendicular to them, made, for instance, in the form of plates, one end of which is stiffly fixed on perforated planes, and the second one is made in the form of a yoke covering the rod and pulling it by a screw to the appropriate rod.
EFFECT: improved efficiency of sound suppressing.
3 cl, 2 dwg
SUBSTANCE: invention relates to fire-resistant building boards and method of their production, namely to fire-resistant boards made of wool, produced by weaving thin metallic threads from waste cans, tin, iron, non-ferrous metals, etc. Invention consists in the production of fire-resistant building board made of wool, produced by weaving thin metallic threads from waste cans, tin, iron, non-ferrous metals, etc.
EFFECT: invention makes it possible to reuse materials, maximises fireproof, soundproof and heat insulating properties of boards, increases the proportion of recycled materials and reduces the amount of wastes when dismantling buildings, and thus contributes to the development of ecologically clean production.
9 cl, 15 dwg
SUBSTANCE: in sound-absorbing elements of a room comprising shaped and perforated walls, between which there is a layer of a sound-absorbing material, besides, one of the walls is made smooth, and the sound-absorbing material is arranged in two layers, one of which, the harder one, is solid and shaped, and the other one, the soft one, is made as interrupted and is arranged above surfaces of the first layer, the sound-absorbing elements of the room contain a frame, window, door openings, openings for placement of lamps and acoustic barriers, made in the form of stiff and perforated walls, between which there is a sound-absorbing material arranged into two layers, one of which, the harder one, is made as solid and shaped, of complex profile, made of inclined faces directed downwards, and connected with horizontal faces, in which resonant holes are made, and the other one - the soft one, is made as interrupted and is arranged under sound-reflecting surfaces of the first layer. The solid shaped layer of the sound absorbing material is made from a material, in which the coefficient of sound reflection is more than the sound absorption coefficient.
EFFECT: increased efficiency of noise absorption.
3 cl, 5 dwg
SUBSTANCE: invention is designed for use in the field of scattering and transfer of acoustic oscillations for the required distance, and also for use in the construction industry, for instance, as light bearing structures and heat-insulating covers protected against atmospheric and other effects, apart from the damaging mechanical one. The passive acoustic element comprises a foam plastic coated with a membrane from all sides - with a film of "Scotch tape" type, making it possible to bend the foam plastic without its damage and evenly distributed the acoustic signal along the entire cross section of the foam plastic.
EFFECT: cheaper and simplified design, bending of a panel in various planes at a certain thickness for any degree, without considerable deterioration of acoustic abilities, propagation o sound to all sides in three extends of freedom and outside of the material, increased sound capacity of oscillation transfer due to contactless action at a membrane only due to oscillated air, for instance.
FIELD: power industry.
SUBSTANCE: condensation steam turbine power plant includes an acoustic operator cabin that is sealed and equipped with a life support system in the form of an artificial microclimate system with a control panel, as well as a workstation. The cabin frame is made in the form of acoustic noise absorbing panels.
EFFECT: invention allows increasing operating efficiency of the power plant, rationally using secondary energy resources, as well as improving labour conditions of service personnel.
SUBSTANCE: heat insulation coating represents a mixture of metallised and non-metallised ceramic microspheres, as a binding substance of which a mixture is used containing styrene-acrylic latex (5.0-10 wt %), sodium liquid glass (1.0-3.0 wt %) and low-molecular silicon rubber (4.0-6.0 wt %). Metallisation of ceramic microspheres is arranged from a soft magnetic iron metal, with thickness of 800-900 angstrom. In process of coating application, microspheres are exposed to magnetic power lines, for creation of which on the reverse side of the surface of the item of complex configuration, in respect to the side, onto which a coating is applied, there is a steel core, an induction winding, wires to supply current and voltage.
EFFECT: higher efficiency and productivity of heat insulation works.
SUBSTANCE: structure of a room comprises a frame of a room, window and door openings, acoustic barriers of shop surfaces and unit sound absorbers of conical and prismatic types above noisiest process equipment. Acoustic barriers comprise profiled and perforated walls, between which a layer of a sound-absorbing material is arranged. Elements of a sound-absorber of prismatic type above noisiest process equipment comprise a frame suspended by hooks, for instance, on cables or directly fixed to a rigid wall or a ceiling of a production room. The frame is arranged by its form in the form of two cubic surfaces, one of which is external, the outer one, is arranged as perforated, and the other one, the inner one, - acoustically transparent, besides, the sound-absorbing material wrapped by a meshy nylon fabric is arranged in the gap between frames. The relation of the ratio (H/W) of parameters of the production room to thickness HI of the acoustic barrier is in the optimal range of values 0.0007÷0.006, and the relation of the ratio (H/W) of the room height to its width to the ratio (H2/R) of thickness of the sound absorber element to its height of suspension is in the optimal range of values 0.27÷0.68. Elements of the sound absorber of conical type comprise a rigid conical frame with a round cover, tightly adjacent to the base of the cone as a result of a fastening spring, arranged inside the frame and connecting a metal cap, arranged at the cone top with a hook for suspension to the production room ceiling. On the inner conical surface of the frame there is a sound-absorbing element from mineral fibre in a wrapper from coarse fabric or sackcloth. The frame with the round cover have perforation in the form of holes of round, slot or rectangular shape and are made of metal.
EFFECT: invention makes it possible to increase efficiency of noise absorption due to expansion of the frequency range and secondary absorption of sound waves reflected from a sound absorber.
2 cl, 5 dwg
SUBSTANCE: sound-absorbing structure of a room comprises a frame of a room, window and door openings, acoustic barriers of shop surfaces and unit sound absorbers of conical and prismatic types above noisiest process equipment. Acoustic barriers comprise profiled and perforated walls, between which a layer of a sound-absorbing material is arranged. Elements of a sound-absorber of prismatic type above noisiest process equipment comprise a frame suspended by hooks, for instance, on cables or directly fixed to a rigid wall or a ceiling of a production room. The frame is arranged by its form in the form of two cubic surfaces, one of which is external, the outer one, is arranged as perforated, and the other one, the inner one, - acoustically transparent. The sound-absorbing material wrapped with a meshy nylon fabric is arranged in the gap between frames. The relation of the ratio (H/W) of parameters of the production room to thickness HI of the acoustic barrier is in the optimal range of values 0.0007÷0.006, and the relation of the ratio (H/W) of the room height to its width to the ratio (H2/R) of thickness of the sound absorber element to its height of suspension is in the optimal range of values 0.27÷0.68. Elements of the sound absorber of conical type comprise a rigid conical frame with a round cover, tightly adjacent to the base of the cone as a result of a fastening spring, arranged inside the frame and connecting a metal cap, arranged at the cone top with a hook for suspension to the production room ceiling. On the inner conical surface of the frame there is a sound-absorbing element from mineral fibre in a wrapper from coarse fabric or sackcloth. The frame with the round cover have perforation in the form of holes of round, slot or rectangular shape and are made of metal.
EFFECT: invention makes it possible to increase efficiency of noise absorption due to expansion of the frequency range and secondary absorption of sound waves reflected from a sound absorber.
2 cl, 5 dwg
SUBSTANCE: method includes filling of slots with an elastic sealing material or a putty, soundproof properties of which meet normative requirements. Measurements are additionally carried out in one-third octaves in the range of frequencies of 100-1,250 Hz. A panel from silicate glass is used as a soundproofing measure with the following normative values of sound insulation, serving as calibration assessments with permissible deviation of ±0.5 dB: 100 Hz…R=23 dB; 125 Hz…R=24.5 dB; 160 Hz…R=26 dB; 200 Hz…R=27.5 dB; 250 Hz…R=29 dB; 315 Hz…R=30.5 dB; 400 Hz…R=32 dB; 500 Hz…R=33.5 dB; 630 Hz…R=35 dB; 800 Hz…R=33 dB; 1,000 Hz…R=31 dB; 1,250 Hz…R=29 dB.
EFFECT: invention makes it possible to expand the mode of testing.
SUBSTANCE: composite material can be used to produce sheet decorating and heat-insulating materials in residential, agricultural and industrial construction, as well as for producing moulded packaging elements and containers susceptible to biodegradation, i.e., having biodegradable properties. The polymer composite material consists of, wt %: fibre filler - waste cardboard and/or paper 11.0-12.0, cationic-anionic polyacrylamide resin Ultrarez DS-150 56.0-57.0, polyvinyl alcohol in form of a 15 wt % aqueous solution 27.0-28.0, sodium tetraborate 6.0-3.0. Described is a method of producing a composite material which involves separating fibres of the fibre filler on a rotary disperser with rotor speed of 2500-3000 rpm, wherein the polyvinyl alcohol is added at the mixing step in form of a 15 wt % aqueous solution together with the cationic-anionic polyacrylamide resin Ultrarez DS-150 and sodium tetraborate, pressing and drying.
EFFECT: improved physical and mechanical properties of the polymer composite material while simplifying the production technique.
2 cl, 3 ex
FIELD: process engineering.
SUBSTANCE: invention relates to construction, particularly, to production of finishing materials. Nonwoven geotextile is used as a substrate. Layer of hardened bulk comprises pebble gravel preprocessed by epoxy paint and mixed with polymer binder at 4:1 ratio. Said epoxy paint comprises epoxy resin, thickener and pigment or mineral dyestuff. Polymer binder represents a water-dispersion acryl or polyvinyl acetate or epoxy material. Hardened bulk layer thickness consists of the mix pebble gravel preprocessed by epoxy dye and polymer binder equal 2-7 mm. Hardened bulk layer face surface is coated with polymer binder layer diluted in water at 1÷10 ratio.
EFFECT: high durability, flexibility and vapour permeability, simple composition and production.
SUBSTANCE: cover comprises a layer providing for free diffusion of a water vapour, a metal layer arranged on it. The metal layer for prevention of corrosion is coated with a protective layer, which contains a synthetic material with addition of amorphous SiO2. The layer providing for free diffusion of water vapour is arranged from a spunbonded web and/or film.
EFFECT: mechanical reflection of rain and snow, possibility to control transfer of water vapour between inner space of a roof and environment, and possibility to reflect thermal or infrared beams.
14 cl, 1 tbl, 2 ex
SUBSTANCE: invention concerns construction field and can be used for erection of wall elements of frame-free buildings from a metal thin-sheet profile. The bearing wall element from at least one metal corrugate profiled sheet fixed with bolt connections to a support start element of a foundation, is equipped from outside with a longitudinally arranged Z-shaped protective element, which is fixed with a downward inclination above bolt connections. The external edge of the protective element is bent downwards, and its internal edge is bent upwards and is arranged as profiled identically to the shape of profile of the bearing wall element.
EFFECT: improved reliability and durability of metal frame-free building operation.
16 cl, 3 dwg
SUBSTANCE: invention relates to the field of construction of hydraulic structures (dams, bridge piers, pools, reservoirs, wells, etc.). A wall of a hydraulic structure comprises reinforcement, structural and protective layers of concrete, capsules with shells filled with an aqueous saturated solution, having different time resistance to decomposition. Capsules occupy 0.1-10% of the protective concrete layer volume. Shells are made from quellin and/or catgut and/or polyacrylamide. To fill the shells, a solution of Na2SiO3 or Na2SiF6 or Na3PO4 or NaF or Na2C2O4 or NaIO3 is used. In case of contact between a wall of a hydraulic structure with water medium, damage of capsule shells takes place at different times, and aqueous saturated solutions exit into a mass of protective and structural layers of concrete, which neutralise damaging action of free calcium hydroxide.
EFFECT: increased general resistance of hydraulic structures to exposure of water medium, their increased service life.
2 cl, 5 dwg
SUBSTANCE: tape is designed to fill seams between construction slabs. It contains a non-woven base, containing fibres, selected from a group made of natural cellulose fibres, synthetic polymer fibres, glass fibres and their combinations. At the same time the nonwoven base has the following properties, determined according to ASTM C474-05: relative swelling in cross direction is below approximately 1.3%; relative swelling in longitudinal direction is below approximately 0.2% and breaking strength in cross direction is at least approximately 2625 N/m. Besides, a method is proposed for finishing treatment of a seam between slabs, including the following: (1) application of a tape for filling seams onto a seam between slabs by submersion of a tape for seam filling into the first layer of the composition for filling seams; (ii) application of the second layer of the composition for filling seams above the tape, besides, the stage (ii) is carried out before the tape for seam filling and the composition for seam filling applied at the stage (i), have dried substantially, and if required, (iii) application of the third, filling or final layer of the composition for filling seams above the tape, besides, the stage (iii) is carried out before the tape for seam filling and the second layer have substantially dried.
EFFECT: improved quality of the tape due to high strength and reduction of swelling during moistening at simultaneous acceleration of seams filling.
20 cl, 2 tbl, 1 ex
SUBSTANCE: method consists in formation of layer from liquefied composition on the basis of bitumen and thermoplastic elastomer, which is realised at least in three stages. At the first stage and at least at the second stage, onto the first tape substrate and accordingly the second tape substrate, processed with silicon anti-adhesive composition, mastic on the basis of bitumen and thermoplastic elastomer is applied. If mastic temperature is 100-190 deg.C, a fixed layer of mastic is formed on each substrate with thickness making around 1/(n-1) of target product thickness, where "n" - number of layer formation stages. At least at the third stage of layer formation each formed layer of mastic is cooled, released from substrate, one layer is applied onto another, and under pressure and temperature of mastic softening, applied layers are thermally glued and evened along thickness to form summary layer of mastic calibrated by thickness, which is cooled and calibrated in width, corresponding to specified width of target product.
EFFECT: material may be used in construction and in repair of motor roads.
SUBSTANCE: invention concerns building construction, maintenance and repair. Method of sealing and heat insulation recovery for interpanel joints involves joint filling with construction foam and sealant layer application onto external surface of joint seal and panel surface areas adjoining the joint. Through holes are drilled in joint seal along the length of joint at the pitch under 100 cm. Cavities in seal are filled with construction foam is performed by construction foam injection over at least one hole till the foam shows out of neighbouring holes. Each hole is stopped by plug to form external surface of joint seal under sealant layer.
EFFECT: reduced terms of works on heat insulation and sealing recovery of interpanel joints.
FIELD: civil engineering.
SUBSTANCE: particular invention relates to structures of interior walls of building with application of its coating by compound and connective material. There are described structures of interior walls of building (versions), differs by that contains film coating of components of dry wall, including elements of dry wall, containing at least one layer of film coating on element of dry wall, herewith compound of film coating includes water, coupling medium, filler, including at least about 60% by weight CaCO3, and non-cellulose thickener, herewith specified non-cellulose thickener contains polyacrylate; and at least one connective material, connecting coating by film elements of dry wall, forming in essence flat outside surface. Also it is proposed method of creation of interior walls, compound of coating for dry walls and coated by film coating element of dry wall.
EFFECT: effectiveness increase of installation of dry walls and improvement of its texture, and also increasing of its qualitative characteristics.
56 cl, 2 tbl, 3 ex
SUBSTANCE: invention pertains to construction, namely, to reconstruction and renovation of old buildings and constructions, in particular, to means and methods of intra - wall detaching waterproofing for walls protection from soil water. Composition for intra - the - wall waterproofing contains, wt %: potassium silicate with silica modulus 2.33 - 2.88 99.6-99.9, Trilon B 0.1-0.4. Method of intra - wall detaching waterproofing includes supply of the above said composition into brickwork through preliminary drilled holes periodically drying after supply according to the scheme: supply - drying - supply.
EFFECT: viscosity reduction, increase of filtration coefficient, improved detaching water - proofing characteristics for protection of walls from soil water.
2 cl, 2 tbl
FIELD: building, particularly means to provide air-tightness during performing repair works in annular space between hollow cylindrical members located at least partly one inside another.
SUBSTANCE: protection case is adapted for means providing water-proofing of space between hollow cylindrical members of building structure made as tubes of lesser and larger diameters during its operation or repair. Case comprises shell of polymeric material enclosing hollow cylindrical members. Polymeric material may be rubber, preferably reinforced by elastic fabric. Case may be formed as truncated cone formed from circle sector part with perimeter at least partly defined by congruent circle arches and cone generators. Shell length is not less than 5 perimeters of hollow cylindrical member. Protective case is formed of multilayer members made as semi-shells and made of fiber glass. Semi-shells are connected one with another by releasable preferably bolt joints along common joint in longitudinal center plane and having rims on opposite ends thereof to install semi-shells on tube of greater or lesser diameter. Semi-shell side to be installed on tube with greater diameter has cavity for sealing sleeve. Semi-shell side to be connected to tube with lesser diameter may slide along the tube.
EFFECT: increased quality and reliability of tube coaxial mounting, maintaining of necessary connection mobility without its damage.
6 cl, 9 dwg