Raw mixture for manufacture of gas concrete
SUBSTANCE: raw mix for fabrication of gas concrete includes the following components, wt %: portland cement 140 - 150, lime 140 - 150, marshalite 480 - 520, gypsum 0.5 -1, aluminium powder 2.5 - 3, superplasticiser S-3 0.3 - 0.5, water 480 -520.
EFFECT: reduced time of autoclave treatment, increased strength of products from gas concrete.
The invention relates to the construction materials industry, in particular the production of cellular concrete used in low-rise construction.
Known formula for the manufacture of aerated concrete, including Portland cement, lime, silica component (quartz sand, gypsum, aluminium powder, water .
The objective of the invention is to reduce the time of autoclave processing of products made of concrete.
Technical result is achieved by the fact that the raw mix for the production of aerated concrete, including Portland cement, lime, silica component, gypsum, aluminium powder, water, as a quartz-containing component contains Marsala, and optional superplasticizer C-3 in the following ratio of components, parts: Portland 140-150; lime 140-150; Margalit 480-520; gypsum 0.5 to 1; aluminum powder 2,5-3; water 480-520; superplasticizer C-3 0.3 to 0.5. The composition of the raw mix is shown in the table.
|Components||The content parts in Sotah:|
|No. 1||No. 2||No. 3|
For the preparation of the raw mixture is metered commodity components.
Portland cement, lime, Marsala, gypsum, aluminum powder mix. To the mixture of dry ingredients add heated to a temperature of 70-90°With water, superplasticizer C-3 and again mix. The mixture is evenly spread over the area of pre-oiled metal forms, stand in the forms within 12-16 hours, and then molded isdel whom I freed from forms if necessary, cut into pieces and served on the autoclave processing, which is carried out at a temperature of 175°C and a pressure of 0.8 MPa. The total duration of autoclave processing 5-6 hours. After discharge from the autoclave product was incubated for 2 hours at a temperature of not less than 18°C. the product Strength in compression will be 4-5 MPa.
Sources of information
1. Sukharev F and other Production of insulating materials. - M.: Higher. HQ., 1981. - S-216.
Raw mix for the production of aerated concrete, including Portland cement, lime, silica component, gypsum, aluminium powder, water, characterized in that as the silica component contains Marsala and optional superplasticizer C-3 in the following ratio of components, parts:
SUBSTANCE: invention relates to production of heat-insulating foamed building materials. Finely ground rock is mixed with mineral binder, correction additives, a foaming agent and water. The rock used is gaize, the mineral binder is slag-portland cement, the stabilising additive is a mixture of polyacrylamide gel and carbamide-formaldehyde liquid, taken in ratio of 1:1, and the fluxing agent is low-melting frit. The foaming agent is foaming agent PO-6TS or PB-2000. Before mixing, the gaize and frit are ground to specific surface area of 3500-4000 cm2/g. The stabilising additive is used to prepare foam. The moulded articles are fired at temperature of 950°C. Components of the initial mixture are in the following ratio, wt %: rock - 45.5-47.0; mineral binder - 6.5-7.0; stabilising additive - 0.8-0.9; fluxing agent - 15.0-17.0; foaming agent - 0.6 5-0.7; water - the balance.
EFFECT: low heat conductivity and sorption moistening, high strength and wider raw material base for producing foamed glass-ceramic articles.
SUBSTANCE: invention relates to structural materials, specifically to formation of pores in gypsum mixtures, and can be used in the industry of structural materials. In the method of preparing a gas-forming agent for formation of pores in gypsum mixtures, involving mixing calcium carbonate, aluminium sulphate and water, a prepared salt solution consisting of aluminium sulphate and water is mixed with calcium carbonate which is ground to specific surface area of 250-280 m2/kg, with the following ratio of dry components, wt %: aluminium sulphate 30-35.7, calcium carbonate 64.3-70.
EFFECT: obtaining foamed gypsum of low density and heat-conductivity.
SUBSTANCE: invention relates to the industry of building materials and specifically to production of foam concrete. The method of producing a crude mixture for making foam concrete involves preparing a dry mixture from 500 DO portland cement and quartz sand, which is pre-dried and ground to specific surface area of not more than 2400 cm2/g, and simultaneously mixing with said portland cement in a mechanical activator, structuring water and adding a modifying additive - a combination of aluminosilicate microspheres and one- or multi-layered carbon nanotubes in ratio of 1:10, adding the obtained aqueous solution to the dry mixture and mixing for 5 minutes, adding aluminium powder, caustic soda and mixing for 3 minutes, with the following ratio of components, wt %: 500 DO portland cement 20-75, quartz sand 20-75, said modifying additive 0.1-6.0, aluminium powder 0.007-0.5, caustic soda (per dry substance) 0.0005-0.005, water - the balance. In the method of producing a crude mixture for making foam concrete, polypropylene or metal fibre can be added to the mixture in amount of 0.003%.
EFFECT: high safety of producing the crude mixture, high strength and frost-resistance of foam concrete.
2 cl, 1 ex, 3 tbl
SUBSTANCE: invention relates to construction and can be used in making articles from foamed concrete. The method of producing foamed concrete involves preparation of a concrete mixture, adding a foaming agent - aluminium powder, ultrasonic treatment of the mixture, subsequent moulding and hardening. After preparation of the concrete mixture, resonator centres are formed therein in form of separate accumulations of fine particles, for which crude aluminium powder is added to the mixture and a low-speed mixing mode is set - blade rotational speed of 180 rpm. The mixture undergoes ultrasonic treatment, crude aluminium powder is added to the mixture and a high-speed mixing mode is set - blade rotational speed of 620 rpm. The invention is developed in subclaims.
EFFECT: obtaining foamed concrete articles with improved structural and mechanical properties.
4 cl, 1 ex, 3 dwg
SUBSTANCE: invention relates to production porous aggregate for concrete. The mixture for making porous aggregate contains the following in wt %: montmorillonite clay 89.7-92.3; dolomite 6.0-9.0; sulphite-alcohol wort 1.3-1.7.
EFFECT: high frost resistance.
SUBSTANCE: invention relates to production of construction materials, particularly foamed gypsum compositions used to make light heat-insulating materials with a porous structure. The composition for making foamed gypsum articles contains the following in wt %: gypsum plaster 29.0, phosphogypsum 29.0, nonionic surfactant OP-7 0.01, tartaric acid 0.1, iron sulphate 0.003, 25% aqueous hydrogen peroxide solution 0.01, dimethylvinylethynylcarbinol 0.001, water - the balance.
EFFECT: gypsum-based foamed material, having high strength, low specific weight, high heat-insulating and frost-resistance properties.
SUBSTANCE: composition of raw mix for manufacturing of nonautoclave-hardening aerated concrete contains the following components, wt %: portland cement 35.30-49.40, limestone 2.6-2.65, aluminium powder 0.06-0.10, calcium chloride 0.18-0.25, limestone crushed down to specific surface of 300-700 m2/kg 12.40-26.50, water - balance.
EFFECT: stabilisation of a process of aerated concrete mixture aeration, improved operational characteristics of an aerated concrete, reduction of its prime cost with simplification of mixture composition.
1 ex, 2 tbl
SUBSTANCE: aim of the invention is to produce materials having high heat and sound insulation, water vapour permeability, fire-resistance, light weight, as well as high adhesion to concrete, mortar and plaster and high compression strength.
EFFECT: improved technical characteristics.
16 cl, 3 dwg
SUBSTANCE: artificial rock contains the following components, wt %: cement 12-15, quartz sand 25.4-30.2, ferrous oxide 1-1.5; ferrous hydroxide 1-1.5; quicklime 12-15, aluminium powder 0.1-0.3 and water heated to the temperature of 90-98°C, 40-45.
EFFECT: production of strong and ecologically safe artificial rock.
SUBSTANCE: method to manufacture glass ceramic cellular materials includes slurry preparation of a charge with introduction of a silicon carbide in it, charge dehydration with subsequent formation of stocks, drying of stocks, speed burning, sintering of stocks to form a single bar, heating of the bar prior to completion of the foaming process, subsequent cooling of the single foamed bar, its separation into blocks of the preset size, baking of blocks. The quantity of silcon carbide or wastes of items processing containing at least 25% SiC introduced into the charge makes 0.1-5.0%. Stocks are pressed with thickness from 10 to 60 mm, the lower and the side surfaces of dried stocks prior to baking are coated with a refractory engobe, and the foamed bar separation into blocks is carried out along the surfaces of the stocks plastering.
EFFECT: production of foamed ceramic materials with thickness of up to 200 mm with evenly closed finely porous structure along the entire volume of the material.
10 cl, 10 ex, 1 tbl
FIELD: building material technology, in particular heat-retention concretes.
SUBSTANCE: cellular concrete mixture contains (mass %) Portland cement 15-30; lime 15-20; aluminum powder 0.03-0.10; silica component (e.g. ground quartz sand) 30-42; alkali inverted slurry, obtained from technological waste from green body cutting, 15-20, gypsum 1.5; and balance: water. Claimed mixture is obtained by preparation and mixing in blender of Portland cement, lime, aluminum powder, ground quartz sand, alkali inverted slurry. In this method slurry is outwashed with water into vessel wherein constant mixing and dispersion are carried out, charged in blender, dosed and mixed with other components in following sequence: ground quartz sand, said alkali inverted slurry, Portland cement, lime, additionally gypsum, aluminum powder. Optionally part of alkali inverted slurry is fed from vessel into slime bath for further agitation and homogenizing.
EFFECT: cellular concrete with improved physical and technical characteristics; stimulation of production process; decreased cost of product.
2 cl, 1 tbl, 1 ex, 1 dwg
FIELD: construction materials industry.
SUBSTANCE: the invention is dealt with the field of construction materials industry, and primarily, with production of heat-resistant foam-ceramic materials. The method of production of foam-ceramic items provides for mixing of a fine-ground clay, a filler, a fiber, water and a foaming agent, molding of items, heating and calcination. In the capacity of the fiber use a basalt fiber or an asbestos fiber, or glass-fiber, and in the capacity of the filler - a ground glass or a burnt at the temperature of no less than 550°C, preferably 600°C, clay, in the capacity of foaming agent - a separately prepared foam. Additionally they enter a plasticizer, a liquid glass, phosphoric acid. Heating of items molded at a drying, is conducted at the temperature of 35-45°C, and their calcination - at the temperature of from above 940°C, preferably - 980°C. The ratio of the mixture compounds makes (in mass %): the clay 46-56, filler - 7.8-12.8, the liquid glass - 0.07-0.77, the indicated fiber - 0.39-0.43, the plasticizer - 0.13-0.23, phosphoric acid - 0.13-0.38, foam - 2.6-3.8, water - the rest. The technical result is an increase of strength, expansion of the source of raw materials of the initial components used for production of the foam-ceramic items and utilization of the man-caused waste products.
EFFECT: the invention ensures increased strength, expanded source of raw materials of the initial components for production of the foam-ceramic items, utilization of the man-caused waste products.
6 cl, 2 tbl, 1 ex
SUBSTANCE: method comprise preparing cellular concrete mixture, filling the mixture, staying the mixture for a time period, dismounting the formwork, cutting, and autoclave treating. The cutting is carried out in two stages. In the first stage, when the mixture reaches plastic strength, A1, the "crust" is cut out. In the second stage, upon the strength reaches the plastic strength A2, the article is cut into blocks of given sizes The ratio of the strength values should be A1/A2 = 3.2-4.1. The cut concrete part is used for preparing cellular concrete mixture. The mixture for cellular concrete comprises cement, sand, water, aluminum powder, and lime. The water mass required for preparing the mixture is determined form the formula proposed.
EFFECT: reduced labor consumptions.
SUBSTANCE: method comprises supplying water and cement or water, cement, and sand to the cavitation mixer, mixing the ingredients in the presence of an activator during 5-15 min, introducing the dry blowing mixture to the solution produced, and further mixing during 15-60 s. The dry blowing mixture is composed of, in mass %, 70 of cement, 12 of pigment aluminum powder, 12 of water-soluble aluminum powder, 2 of antifreeze plasticizer, and 4 of water.
EFFECT: reduced cost and enhanced efficiency.
SUBSTANCE: mixture comprises cement or cement and filler, water and blowing mixture provided with plasticizer. The dry blowing mixture is composed of, in mass %, 70 of cement, 12 of pigment aluminum powder, 12 of water-soluble aluminum powder, 2 of antifreeze plasticizer, 4 of water. The mixture comprises 0.3125-1.25% of the cement mass.
EFFECT: enhanced resistance to cold.
2 ex, 4 tbl
FIELD: manufacture of building materials.
SUBSTANCE: invention concerns manufacture of aerated concrete suitable for structural-insulation parts used in construction of residential, public, and industrial buildings up to two floors high and having no internal framework. Composition contains, wt %: cement, non-washed and non-ground sand 31-42, aluminum powder 0.10-1.0, caustic soda 0.05-0.45, and water - the balance. Manufacture of aerated concrete comprises dissolving alkali component (caustic soda) in water at 65-90°C, stirring resulting solution with added thereto cement, sand, and aluminum powder, pouring thus obtained mix into mold, and keeping it therein to swell and harden.
EFFECT: increased strength of aerated concrete and reduced manufacture expenses.
2 cl, 2 tbl
FIELD: industry of building materials; production of light refractory concretes.
SUBSTANCE: the invention is pertaining to the field of industry of building materials in particular, to production of light refractory concretes. The technical result is an increased strength and decreased density of newly- molded items at utilization of wastes and conservation of time of solidification. The raw mixture for production of the light refractory concrete containing an aluminum powder, orthophosphoric acid of 60 % concentration, aluminous slag and additionally contains sulfate slime and vermiculite at the following components ratio (in mass %): aluminum powder - 3-4, indicated orthophosphoric acid - 22-25, aluminous slag - 40-42, sulfate slime - 12-14, a vermiculite 15 - 23.
EFFECT: the invention ensures increased strength and decreased density of newly- molded items at utilization of wastes and conservation of time of solidification.
FIELD: building materials, particularly porous mortars, concrete, artificial stone or ceramic ware.
SUBSTANCE: basic mixture in accordance to the first embodiment comprises the following components taken in % by weight: Portland cement - 50-70 and remainder is high-calcium ash obtained at heat power plant. Basic mixture in accordance to the second embodiment comprises the following components taken in % by weight: Portland cement - 40-60, sand 20-30 and remainder is high-calcium ash obtained at heat power plant. Basic mixture in accordance to the third embodiment comprises the following components taken in % by weight: Portland cement - 30-70, ammonia chloride or ammonia sulfate - 0.5-1.5 and remainder is high-calcium ash obtained at heat power plant. Basic mixture in accordance to the forth embodiment comprises the following components taken in % by weight: Portland cement - 30-70, ammonia chloride or ammonia sulfate - 0.5-1.5, bentonite - 0.25-3.0 and remainder is high-calcium ash obtained at heat power plant.
EFFECT: reduced power inputs for concrete and concrete article production, provision of undirected capillary porosity, low moisture content and shrinkage and stable time-increasing strength.
4 cl, 4 tbl
FIELD: chemical technology.
SUBSTANCE: method for preparing β-sialone powder by carbothermal reduction of kaolin involves thermal treatment of charge in nitrogen atmosphere at 1710-1780°C for 5-25 min. Charge comprises a carbon component with particles size 20-500 nm. An average size of particles of prepared β-sialone powder can be regulated by using the disperse carbon component of charge with the required size of particles. Invention provides the development of rapid and simple in realization method for preparing β-sialone powder providing preparing β-sialone with the required size of particles.
EFFECT: improved preparing method.
2 cl, 3 ex
FIELD: manufacture of ceramic materials of cellular structure; manufacture of building materials.
SUBSTANCE: proposed mixture includes the following components, mass-%: microsilica, 8.06-8.31; fly ash, 56.30-58.20; aluminum powder, 0.40-0.42; detergent, 0.40-0.42; carboxymethyl cellulose, 0.81-0.98; calcium chloride, 0.17-0.19; water, 32.20-33.54. Method of manufacture of ceramic materials of high-porous structure includes preparation of mixture, molding, vibration bulging, drying at temperature of 100°C and roasting at temperature 900°C.
EFFECT: enhanced strength; low cost; extended field of application.
3 cl, 2 tbl, 1 ex