Cellular concrete mixture and method for production the same

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

 

The invention relates to the production technology of building materials and can be used for insulating and thermo insulating cellular concrete autoclaved for various purposes.

Famous raw mix for the production of aerated concrete and the method of its preparation by RF patent No. 2058968. The composition of the mixture containing Portland cement, fly ash, urea, calcium hypochlorite, surface-active substance. Method of cooking lies in the sequence of mixing the components, namely, first mix the water and fly ash, then add the Portland cement and calcium hypochlorite, and after stirring the remaining components.

The lack of raw mixture and of the way that concrete is very heavy with a specific gravity of more than 1000 kg/m3.

Also known raw material mixture and method of its preparation for ASW. The USSR №1402591, by this method in the commodity mix add it steamed waste concrete raw. The duration of the process of obtaining concrete is extremely high: the time of expansion 33...39 hours, the duration of exposure to cutting "pink" about 3 hours and the duration of keeping up to autoclave treatment for about 5 hours, in the end, the whole process takes 41...47 am Fine grinding steamed waste getbet the raw frame requires high energy costs and a longer period of time.

Also known composition and method of preparation of the concrete mixture by ASV. The USSR №1402591.

The composition of the raw mix: Portland cement, fine-grinded sand, lime, and 3.5%, aluminum powder, steamed waste concrete raw water - the rest. In this way all the components are mixed at the same time.

The closest analogue for the claimed mixture is aerated concrete mixture comprising, kg per 1 m3mixture: 150 Portland cement, lime, 100, siliceous component, an acidic ash 380, aluminum powder PAP-1 0,4, waste concrete mix - concrete-raw with a moisture content of 10-20% in the amount of 20-60% 100% (CaO+MgO) is active, the water 315 (patent SU # 1539190, 04 38/02, 30.01.1990, description).

The closest analogue to the claimed method is a method for preparing aerated concrete mixtures, including the preparation and mixing of the components, including waste production of aerated concrete-raw sugar in the mixer, if the following sequence - water siliceous component, astringent, including lime with these wastes, aluminum powder, and as a moisture-containing component is injected listed waste with a moisture content of 10-20% in the grinding of lime (patent SU # 1539190, 04 38/02, 30.01.1990, description).

Object of the invention is the improvement of physico-technical properties of cellular concrete, intensifies the I process of their production, reducing the cost of production.

This task is solved in that the aerated concrete mixture including Portland cement, lime, aluminum powder, siliceous component, the waste production of aerated concrete raw water, contains as the siliceous component of ground quartz sand, waste production of aerated concrete-raw - alkaline reverse the slurry prepared from technological waste cutting raw and cutting layer, and optionally - gypsum, in the following ratio, wt.%:

Portland 15-30

lime 15-20

aluminum powder 0,03-0,10

ground quartz sand 30-42

specified alkaline return sludge 15-20

plaster 1,5-2,0

water the rest

This task is solved in that in the method of preparation of the concrete mixture, including the preparation and mixing in the mixer Portland cement, lime, aluminum powder, siliceous component, waste production of aerated concrete raw as waste production of aerated concrete raw use alkaline reverse the slurry prepared from technological waste cutting raw and cutting plant that wash water into the tank, where they perform the constant mixing and dispersion make it, then the specified slurry fed into the mixer, where it is metered and mixed together the other components in the following sequence: as the siliceous component - ground quartz sand, specified alkaline return sludge, Portland cement, lime, additionally, gypsum, aluminum powder. Moreover, it is possible that part of the said alkaline return sludge from the tank is fed into the sludge pool for further mixing and averaging.

The invention is illustrated in the drawing and table 1. The drawing shows a diagram of an installation for implementing the method.

In table 1 shows the composition and physical-mechanical properties of the proposed mixture.

The apparatus comprises a mixer 1 is connected to line feed components 2...7 with the Executive bodies of 8...13 designed to regulate the flow of each component of the mixture. From mixer 1 departs the supply line to the mixture 14. On the conveyor 15 array raw 16 is cut to size, and the waste is discharged into the container-agitator 17 containing a mixing unit 18. From the tank 17, there is a pipe 19 with the pump 20 for supplying the mixture in the slurry-pool 21, which also installed a mixing device 22. The pipe 23 and pump 24 are designed to return waste return sludge in the mixer 1. Line 23 is equipped with a weighing loop 25, which is designed for continuous weighing solution return sludge and maintain its density at the level of 1.45 kg/DM3.

Examples of implementation of the composition shown in table 1.

Technological waste resulting from cutting raw and cutting layer, washed with water into the tank 17, which are machined, mixed with water, are dispersed. As a result of processing waste turns alkaline return sludge, which gives an alkaline reaction in the liquid phase (PH above 10) due to hydration present in the waste composition unreacted grains of cement and lime. High alkalinity and the dispersion of the particles return sludge help, as you know, speedier and more complete reactions in the hardening of the concrete mix, more speed dial plastic and ultimate strength, faster aging of concrete, the duration of the process of expansion, and reduced the cost of preparing the mixture for 30...35%. So prepared alkaline return sludge pump 20 is pumped into the sludge pool 21, which additionally is constantly mixed and averaged, and then fed to the mixer 1, which is dosed and mixed with other components. Line 23 contains weighing "loop" 25, which automatically maintains the desired density of the sludge 1,45 kg/DM3.

The application of the invention has allowed to obtain a number of significant advantages, namely:

1. Reduce several times the time of preparation of the mixture for cellular concrete.

<> 2. To reduce production costs by 30...35%.

3. To enhance the strength properties of the finished product when its low density, good thermal insulation properties.

4. To automate the process of production of cellular concrete, make it a waste.

5. To ensure continuity of the production cycle.

6. To improve working conditions and safety.

A significant intensification of the production cycle of the products is ensured in almost all technological limits (time of expansion, exposure, autoclaving decreased).

In addition, there was a decrease of slidenote between layers of finished products prepared according to the proposed method.

Table 1
CompositionThe content of dry ingredients, mass. %Waste production of aerated concrete, wt.%Characteristics of technological limitsPhysico-mechanical properties
PortlandLimeGround quartz sandGypsumAluminum powderSteamed waste aerated concreteAlkaline return sludgeTime spuce the project, hourTime to cut/ParkThe length of the Park, an hourDensity, kg/m3Strength, kgf/cm2Mark frost, F
11520422,00,10 20233,3/4,41267055,035
223,016,2371,9being 0.036-16,2253.5/4,51371460,035
33015301,50,03-15243,6/4,61472465,035

1. The aerated concrete mixture including Portland cement, lime, aluminum powder, siliceous component, the waste production of aerated concrete-raw sugar and water, characterized in that it contains as the siliceous component of ground quartz sand, waste production of aerated concrete-raw - alkaline reverse the slurry prepared from technological waste cutting raw and cutting the layer, and additionally plaster in the following ratio, wt. %:

Portland 15-30

Lime 15-20

Aluminum powder 0,03-0,10

Ground quartz sand 30-42

Specified alkaline return sludge 15-20

Plaster 1,5-2,0

Water the Rest

2. Method of preparation of concrete mixtures, including the preparation and mixing in the mixer Portland cement, lime, aluminum powder, siliceous component, waste production of aerated concrete raw, characterized in that as a waste of the production of aerated concrete raw use alkaline reverse the slurry prepared from technological waste cutting raw and cutting plant that wash water into the tank, where they perform the constant mixing and dispersion make it, then the specified slurry fed into the mixer, where it is metered and mixed together with other components in the following sequence: as the siliceous component is milled silica sand, specified alkaline return sludge, Portland cement, lime, additionally, gypsum, aluminum powder.

3. The method according to p. 2, characterized in that the part of the said alkaline return sludge from the tank is fed into the sludge pool for further mixing and averaging.



 

Same patents:

The invention relates to the production of building materials, in particular the production of porous (porous) concrete, and is recommended for use in the efficient production of wall materials

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The invention relates to the construction materials industry and can be used for the production of insulation products used in the construction of buildings and structures

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

FIELD: construction.

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.

3 cl

FIELD: construction.

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.

4 tbl

FIELD: construction.

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.

2 tbl

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

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