Composite heat insulation-ballast material based on wood wastes
SUBSTANCE: composite material contains cement, filler, water and additionally a filler. At the same time the filler is barite ore with particle size from 0.01 to 160 mcm, filler - wood chips with particle size from 0.5 to 20 mm at the following ratio of components, wt %: cement - 17-25, barite ore - 35-56, wood chips - 6-12, water - 20-30.
EFFECT: increased strength, reduced coefficient of heat conductivity, density.
The invention relates to the field of construction, in particular to materials derived from wood waste, and can be used for thermal insulation and ballasting of underwater pipes. Underwater pipeline design must have negative buoyancy, strength and to have thermal insulation to reduce the loss of the transported thermal energy.
Known insulating material obtained by mixing the pre-treated solution woody aggregate, Portland cement, additives and water, followed by molding and hardening, in which the wood filler take wood chips, as the solution for aggregate use 30% solution of glass sodium in the amount of 10% by weight of wood filler, the binder take the cement on the basis of Portland cement clinker with a tensile strength of 40 MPa, pre-mixed with the additive, which take the calcium chloride in the powdered state with a mass fraction of calcium chloride is not less than 90% and at 2% by weight of Portland cement after mixing the components with water in the mixture impose additional technical foam from an aqueous solution of hydrolysate 1% concentration (Patent No. 2493136 of the Russian Federation, IPC C04B 40/00, C04B 18/26, C04B 20/00. The way the floor is the treatment of insulation material / Ziatdinov D. F., Timerbaev N. F., Safin P. P., R. Safin, etc. no 2012107547/03; Appl. 28.02.2012; Publ. 20.09.2013). thermal conductivity of the material from 0,142 to 0,153 W/(m2*°C), a density of from 305 to 326 kg/m3.
The disadvantages of this material are a large number of components and their high cost, and low density, resulting in its use in underwater pipeline complicates the design because it requires additional ballasting from surfacing.
The closest in technical essence is the ballast material, which contains cement, aggregate and water. At the same time as filler it contains barite ore following fractions: coarse fraction with a grain size of more than 5 mm to 25 mm, the fine fraction with a grain size of more than 0.16 mm to 5 mm, very fine fraction with a particle size of from 0.01 μm to 160 μm. Additionally, the inventive ballast material contains a plasticizer, namely polycarbonatediol (Patent No. 2399828 of the Russian Federation, IPC F16L 58/06, C04B 28/00, C04B 111/20. Ballast material / Svechkarev A. P., Shaporin I. I. No. 2008127272/03; Appl. 07.07.2008; Publ. 20.09.2010).
The disadvantage of this material is that it cannot use as a heat insulator. The claimed material has a density of more than 3060 kg/m3therefore included in the group of heavy concrete. The materials included in this group, the coefficient of thermal conductivity is not the shrinks of 1.35 W/(m 2*°C). According to this indicator, the use of such materials as insulating materials of heat pipes techno-economically not justified.
The aim of the invention is to provide a composite heat-insulating-ballast material using waste wood having low thermal conductivity, negative buoyancy, high strength, namely the following physical and mechanical properties: coefficient of thermal conductivity no higher than 0,17 W/(m2*°C), a density of at least 1000 kg/m3the compressive strength after 28 days of not less than 5 MPa.
This goal is achieved by the fact that the claimed material contains cement, aggregate, water, and optionally a filler. The filler used barite ore with a particle size of from 0.01 to 160 μm, the filler - wood chips with a particle size of from 0.5 to 20 mm in the following ratio, wt.%:
Cement - 17-25
Barite ore - 35-56
Wood chips - 6-12
Water - 20-30.
The proposed composite material based on wood waste can be used for underwater pipes as thermal insulation and ballast at the same time.
In the patent and scientific literature, the proposed composition of the material with specified properties and performance not found.
With C the pouring process of filling the annular space of the plasticity of the material is provided by the ratio of water to wood shavings in the range of 2.5-3.5 and a fraction size of barite ore 0.01 to 160 microns.
To ensure the solidity of the material particle size of the filler should be in the range of 0.5-20 mm
Examples of compositions of the material and its characteristics are presented in the table.
As the cement used is Portland cement M400.
Determination of the average density of the mixtures, thermal conductivity and strength are presented in table made in accordance with GOST 12730.1-78, GOST 25380-82 and GOST 10180-90.
Results of field experiments, are shown in the table, show the benefits of the properties of the material according to the invention.
|No.||The composition of the composite g/wt.%||Density, kg/m3||Coefficient of thermal conductivity, W/(m2*°C)||The limit of compressive strength, MPa|
|polycarbamyl||of 0.2-0.3||3060-3400||No data||56-75|
Composite insulation-ballast material based on wood waste containing cement, aggregate and water, characterized in that it contains as filler barite ore with a particle size of from 0.01 to 160 μm, and optionally, a filler - wood chips with a particle size of from 0.5 to 20 mm in the following ratio, wt.%:
SUBSTANCE: invention relates to a hydraulically setting mixture containing, wt %: a) 6-25 cement, b) 50-90 of at least one aggregate, wherein the maximum grain size ranges from 8 mm to 63 mm and/or sand with grain size of 5 mm, and c) 0.001-8 of at least one fluoroorganyl-substituted silicon compound, wherein the fluoroorganyl-substituted silicon compound is 3,3,4,4,5,5,6,6,7,7,8,8,8-tridecafluorooctyltrimethoxysilane which is in solid granular form on an inorganic material used as a substrate. The invention also relates to a method of producing the mixture and use of the mixture to produce structural materials.
EFFECT: obtaining structural materials with a surface having dirt-repellent properties and which is easy to clean for a long time.
11 cl, 6 ex, 1 tbl
SUBSTANCE: group of inventions relates to dry concrete or mortar composition, containing porous granules and to concrete or mortar, manufactured from said composition. Dry concrete or mortar composition, containing particles-cores, to the surfaces of which particle of hydraulic binding substance are fixed, and separate particles of hydraulic binding substance, particles-cores consist of inert or pozzolanic material and together with binding substance attached to them form porous granules, which, in their turn, are fixed to the surface of dry filling agent. Concrete or mortar, manufactured from said dry composition, mixed with water, is described. Invention is developed in dependent items of the invention formula.
EFFECT: increase of strength and fire resistance of concrete, obtained from claimed dry composition.
25 cl, 2 ex
SUBSTANCE: present invention relates to a hydraulic composition which includes: at least one hydraulic binder, at least one first plasticising additive which includes at least one phosphonic-amino-alkylene group, at least one second plasticising additive which includes at least one polymer with a comb-like structure, wherein the weight concentration off the dry residue of the second additive is 25-100% of the weight concentration of the dry residue of the first additive. The invention also relates to concrete which includes said hydraulic composition and the composition of a diluting mixture for said hydraulic composition. The invention is developed in subclaims.
EFFECT: low viscosity of the hydraulic binder-based composition over the processability duration of the composition.
10 cl, 6 tbl, 2 dwg
SUBSTANCE: invention relates to powders for obtaining a self-levelling freshly-prepared concrete mixture. The powder contains, wt %: from 94% to 99% of particles of at least one fire-proof material, whose main component is represented by aluminium oxide and/or zirconium dioxide, and/or silicon dioxide; from 1% to 6% of hydraulic cement; from 0 to 0.03% of organic fibres; optionally from 0.075% to 1%, preferably from 0.1% to 1% of a surface-active substance; and optionally a setting accelerator, with the fraction of particles, possessing the size less than 40 mcm, being distributed relative to the powder mass in the following way, wt %: fraction <0.5 mcm - ≥4%, fraction <2 mcm - ≥5%, fraction <10 mcm - ≥16%, fraction <40 mcm - 29-45%, and a part of zirconium dioxide in the fraction of particles with the size less than 10 mcm, called "fine fractions", is in the range from 35 wt % to 75 wt % relative to the total weight of the said fraction.
EFFECT: improvement of the concrete mixture self-levelling.
24 cl, 6 tbl
SUBSTANCE: invention relates to building equipment and can be applied in the production of concrete products for the improvement of their basic physical-chemical properties. The complex additive for concrete mixtures and mortars contains a superplasticiser C-3, a mixture of Iceland spar, aluminium sulphate and fine-grained pyrite in a ratio, wt %: superplasticiser C3 10-30, Iceland spar 50-80, aluminium sulphate 5-7.5, fine-grained pyrite 5-7.51.
EFFECT: improvement of basic properties of concrete: increase of strength and reduction of moisture permeability.
1 dwg, 1 tbl
SUBSTANCE: raw material mixture for concrete production, which contains cement, a fine filler, a plasticising additive and water, additionally contains milled and sieved through net No. 10 mobile phone waste with preliminarily extracted accumulators with the following component ratio, wt %: cement 24-36; fine filler 12.7-17.9; plasticising additive 0.1-1.5; water 18-36; milled and sieved through net No. 10 mobile phone waste with preliminarily extracted accumulators 10-40.
EFFECT: safe utilisation of mobile phones.
SUBSTANCE: raw material mixture for obtaining artificial stone includes, wt %: Portland cement 28-30, carbon silicides 26-29, iron oxides 1-1.5, water 28-30, cut into 5-15 mm segments asbestos fibre 1-1.5, quartz sand 11-13.
EFFECT: obtaining durable and ecologically safe artificial stone.
SUBSTANCE: invention relates to a powdered composition of a construction material, preferably dry mortar for industrial production, and especially to tile adhesives, joint filler, putty, waterproofing slurry, repair mortar, levelling mortar, reinforcing adhesives, adhesives for heat-insulation composite systems, mineral plaster, fine putty and seamless floor systems, which contains an ester of A) 2-ethylhexanoic acid and B) an alcohol with a boiling point of at least 160°C. Further, the invention discloses the production of said products, as well as use of esters according to the invention in powdered compositions of construction materials for reducing dust formation. The invention is developed in subclaims.
EFFECT: reducing dust formation, reducing the degree of release of organic compounds during storage and use of construction materials.
14 cl, 1 tbl
SUBSTANCE: claimed invention relates to a concrete-expanding additive and to a method of obtaining thereof. Concrete with the said additive possesses higher stability in storage. The concrete-expanding additive is obtained by thermal treatment of a clinker or a powder-like clinker, which contains in wt.p. per 100 parts of the clinker free lime in an amount of 10-70, a hydraulic substance 10-50 and water-free calcium sulphate 1-50, in an atmosphere of gaseous carbon dioxide to form in it calcium carbonate. In the method of obtaining an expanding additive clinker, containing free lime, the hydraulic substance and water-free calcium sulphate are subjected to thermal processing to form in it calcium carbonate. The invention is developed in dependent items of the invention formula.
EFFECT: provision of considerable concrete expansion in the period from 2 to 7 days after laying, which makes it possible to develop high early compression strength.
9 cl, 7 tbl
SUBSTANCE: method of preparing the concrete mixture, consisting in mixing of cement, aggregates, water, and aqueous suspension of complex modifier of the following composition, wt %: silica fume 40-70; chemical additives 2-10; water - the rest, which is dried prior to mixing in the air stream to obtain powder consisting of granules, according to the invention, the aqueous suspension of complex modifier before mixing is subject to drying under the influence of continuous electromagnetic field of ultra-high frequency of 400-1000 MHz from microwave oscillators and heated air stream of microwave oscillator cooling to obtain powder with grains of size up to 500 microns and moisture of 9-12%; then the dried powdered complex modifier and cement are subjected to dispersion and disaggregation via exposure to pulsed electromagnetic field of ultra-high frequency of 1000-3000 MHz lasting 1-1.5 seconds, till the obtention of ultrafine powder of complex modifier with size of 60-100 nm, moisture of 1-8% and cement of size 0.1-5 microns, after that they are mixed, ground together and activated, form the disaggregated and activated mixture of cement and complex modifier, which is mixed with filler and water, concrete mixture is obtained; this mixture is subjected to the influence of powerful pulsed electromagnetic field of ultra-high frequency of 400-1000 MHz with duration of 1100÷nanoseconds.
EFFECT: increase of strength of concrete mixture.
SUBSTANCE: method to produce a heat insulating fireproof construction material includes heat treatment up to 150-220°C of cellulose wool or loose wood sawdust, mixing with ground sludge of carnallite chlorinators, cooling of the mix to 40°C, its supply for moulding of the specified material by air spraying via an air duct with its wetting by water at the outlet from the air duct at the following ratio of mixture components, wt %: cellulose wool or loose wood sawdust 30-70, specified sludge of carnallite chlorinators 30-70.
EFFECT: development of environmentally pure material with simplified technology of manufacturing.
SUBSTANCE: nanostructured wood-mineral composite material, including a wood filler, a binder and water, additionally contains a reinforcing filler from basalt with average particle size of 50-100 nm, and wood filler is wood of coniferous species in the form of microdispersed particles of wood with average particle size of 1-2 mcm at the following ratio of components, wt %: wood 40-55, basalt 30-40, slaked lime 10-15, water - balance.
EFFECT: increased strength, water resistance.
SUBSTANCE: method for obtaining a heat-insulating material involves mixing of filler and a binding agent with further shaping and hardening. Industrial wood chips 5±2 mm thick are used as filler, and rigid polyurethane foam consisting of polyol and isocyanate is used as the binding agent. First, components of the binding agent are mixed; then, the binding agent is mixed with the filler by layer-by-layer laying of a binding agent layer, a filler layer and a binding agent layer into a mould at the following component ratio, wt %: polyol 24-22, isocyanate 36-33, industrial chips 40-45. After supply of the components is completed, the mould is fixed with latches and exposed during 15-20 minutes.
EFFECT: reduction of density and thermal conductivity of material.
1 tbl, 1 dwg
SUBSTANCE: in the method to manufacture wood concrete items with production of a base on their surface for plastering, providing for preparation and dosing of a hydraulic binder, ground cane stems, water, mixing of components, moulding of items with vibration, hardening, moulding with vibration is carried out so that cane stems cut into sections with length of 4-6 cm are located near the surface of the items, with one end staying in the mix, and with the other one - protruding outside and forming a base for application of plaster.
EFFECT: higher convenience of plaster application onto surface of items.
SUBSTANCE: wood concrete mixture contains, wt %: portland cement 73.5-78.5; hogged chips sieved through sieve N10 20-25; sodium chloride 0.5-1; 3-10 mm long asbestos fibre 0.5-1, wherein the water-to-cement ratio is equal to 0.9-1.
EFFECT: high strength of the wood concrete mixture.
SUBSTANCE: wood concrete mixture contains, wt %: portland cement 28.3-30.4; hogged chips 40-44; gypsum 0.5-1; technical lignosulphonates LST 0.2-0.3; naphthenate soap 0.05-0.1; superplasticiser M-1 or M-1K 0.3-0.5; capron fibre cut to 3-30 mm pieces 0.15-0.2; water 26-28.
EFFECT: high frost resistance of articles made from the wood concrete mixture.
SUBSTANCE: wood concrete mixture contains, wt %: portland cement 41.5-45; hogged chips 27.2-29.2; gypsum 0.5-1; ethylhydrosiloxane polymer 0.3-0.5; capron fibre cut to 3-30 mm pieces 0.3-0.5; water 26-28.
EFFECT: high frost resistance of articles made from the wood concrete mixture.
SUBSTANCE: crude mixture for making heat-insulation articles contains, wt %: wood aggregate ground until passage through sieve N5 77.0-79.0; liquid phenol-formaldehyde resin 7.0-8.0; hydrolysed lignin 5.0-6.0; textile wastes 5.0-6.0; carboxymethyl cellulose 3.0-4.0. Articles are made by hot-pressing the mixture at pressure of 1.3-1.5 MPa and temperature of about 160°C.
EFFECT: obtaining articles with low content of a toxic component - phenol-formaldehyde resin.
SUBSTANCE: invention relates to industry of construction materials, in particular to manufacturing products (plates) from wood-cement compositions, mainly used in rural construction. Arbolit mixture contains (wt %): Portland cement 47-52; crushed wood 22-31.5; quartz sand 20-25; 3% hydrogen peroxide solution 1-1.5, with water-cement ratio constituting 1.1-1.3.
EFFECT: increased frost resistance of arbolit.
SUBSTANCE: invention relates to industry of building materials, in particular, to manufacturing products (plates) from wood-cement compositions, used, mainly, in rural construction. Arbolit mixture contains, wt %: Portland cement 53-60; crushed wood 23-27; ethylhydrosiloxane liquid 13641 5-7; quartz sand 10-1-5, with water-cement ratio 0.9-1.1.
EFFECT: increased frost resistance of arbolit.
FIELD: building materials industry.
SUBSTANCE: the invention is pertaining to building materials industry, in particular, to preparation of the raw stocks mixtures for production fibrocement items. The raw stock mixtures for production fibrocement items include a cement binding, mineral fillers, cellulose fibers, an additive in amount of 0.1...0.5 % by dry substance from weight of solid ingredients of a raw stock mixture and water. In the capacity of an additive it contains a water dispersion of ethylhydroxyethyl cellulose, the sodium salt of a fatty acid and polyoxyethyleneglycol ether of aliphatic alcohol at their ratio (in mass) equal to 1:0.1:0.15. The technical effect - increase of solidity, including impact solidity and frost resistances of the fibrocement.
EFFECT: the invention ensures increased solidity, including impact solidity and frost resistances of the fibrocement.
1 tbl, 1 ex