Additive for construction mixes
SUBSTANCE: additive comprises the following components, wt %: microorganisms of Leuconostoc mesenteroides type cultivated on a synthetic nutrient medium 0.5-2.7; microquartz 97.3-99.5.
EFFECT: increased mobility of a construction mix and concrete strength.
The invention relates to construction materials, namely, additives for mortars, and can be used to obtain mortars and concretes with the release of the designs, products, parts, performance plastering, as in the construction industry and in the construction of housing assignment.
Known various additives, represented as individual substances and complexes of chemical compounds introduced with the aim of improving performance (Batrakov VG Modified concretes. Theory and practice. VG Laborers. M: Technopark, 1998. - P.3-4, - S-133, - S-284, - S-472, - S-631).
The disadvantages of the known additives are relatively low mobility of the mixture and the strength of concrete.
Known mixture of cement binder includes cement, aggregate, water and additives, such as calcium chloride (guidance on the use of chemical additives in concrete / NIIZHB of Gosstroy of the USSR. - M.: stroiizdat, 1980. P.6, P.24).
The disadvantage of the mixture is the development of reinforcement corrosion, efflorescence on the surface due to the introduction of calcium chloride.
The closest to the technical nature of the claimed invention is a method for additives to the concrete mix by culturing in a nutrient medium of the microorganisms, as bacteria which take the form of Leucnostoc mesenteroides. The cultivation is carried out on synthetic nutrient medium with the addition of oleic acid in 24-48 hours at a temperature of 23-25°C in catalogna mode (EN 2133239, IPC C04B 28/02, C04B 24/00, C04B 111/20, publ. 20.07.1999).
The disadvantages mentioned in the way of additives include low-thinning effect and the decrease in strength of the finished material at elevated its consumption.
The technical result is to increase the mobility of mortars and concrete strength.
The invention consists in that in addition to mixes including microorganisms of the species Leuconostoc mesenteroides, cultivated on synthetic nutrient medium, optionally enter microcars, in the following ratio, wt.%;
|Microorganisms of the species Leuconostoc mesenteroides,|
|cultivated on synthetic nutrient medium||05-27|
The genus Leuconostoc is included in the tribe Streptococcaceae family Lactobacillaceae (determinant bacteria Berga). The genus Leuconostoc includes "a typical representative" - Leuconostoc mesenteroides and 8 "secondary" species Leuconostoc pseudomesenteroides, Leuconostoc lactis, Leuconostoc citreum, Leuconostoc gelidum, Leuconostoc carnosum, Leuconostc fallax, Leuconostoc argentinum and Leuconostoc oenos. Leuconostoc belong to gram-positive bacteria, are microaerophilic or facultative anaerobes, form chains, energy metabolism proceeds by type of fermentation, require complex nutrient media. Members of the genus Leuconostoc refer to heterofermentative microorganisms. In practice, used in the manufacture of dairy products, wine and are not pathogens. In addition, Leuconostoc mesenteroides fermented sauerkraut, silage and juice for sugar production. However, they cause damage to the sugar industry, forming mucus and gums, foul tanks and pipelines.
Microcars - mineral powder of silicon oxide, crystalline form (SiO2- 96,6%) with a high value of specific surface area (S=224,1 m2/kg) and the true density ρ=2560 kg/m3.
Supplement the proposed composition was prepared as follows. The synthetic nutrient medium containing potassium chloride 0.1 g of magnesium sulfate, 0.1 g of potassium phosphate one-deputizing - 1.0 g, sodium phosphate disubstituted 2.5 g of ammonium chloride, 0.5 g, salt Mora 0.01 g, paraaminobenzoic acid, 0.05 g, peptone - 0.2 g sugar - 100 g, pyrogen-free water (water for injection) - 1000 ml oleic acid and 1.4 ml sterilized. To obtain a culture liquid of microorganisms of the species Leuconostoc mesenteroides grown in the flask with sinteticheskoi nutrient medium in catalogna mode (160 rpm). Seeding synthetic nutrient medium made from: 100 ml medium one tube of seed material. The duration of the cultivation period is 24-48 hours at a temperature of 23-25°C. Then the culture fluid combine microquasar. The compositions of the additives shown in table 1.
The additive is introduced during the preparation of fine-grained concrete mix composition: cement: sand 1:3 with water-cement ratio equal to 0.53, and mix in the mixer enforcement action. The mobility of the mixture is measured by immersion of the cone on the device STRASZNY. From the concrete mixture is formed into samples of size 4×4×16 cm, then put them in a cell with normal curing for 28 days. After this time determine the strength of concrete Flexural and compression. The results are shown in table 2.
Microcars, having a developed surface, adsorb compounds, which is a typical surfactants with its properties, from the culture fluid. Resulting in a negative processes for formulations that do not contain microcars, greatly reduced. Moreover, as a result of synergies increase the positive effects of an additive which improves the mobility of mortars and concrete strength.
Additive for construction compounds is th
|Components||The compositions of the additive for mortars, mass%|
|Microorganisms of the species Leuconostoc mesenteroides cultivated on synthetic nutrient medium||of 5.4||2,7||7||0,5||0,03||100,0|
|Properties||Indicators for compounds|
|Dip cone, cm||a 4.9||6,7||5,2||the 3.8||2,2||2,5|
|The tensile strength in bending, MPa||the 3.8||5,9||of 5.4||4,8||4,4||4,8|
|The limit of compressive strength, MPa||7,7||16,5||14,7||12,6||11,3||10,9|
Additive for mortars, including microorganisms of the species Leuconostoc mesenteroides, cultivated on synthetic nutrient medium, characterized in that it further impose microcars, in the following ratio, wt.%:
|Microorganisms of the species Leuconostoc mesenteroides,|
|cultivated on synthetic nutrient medium||0,5-2,7|
SUBSTANCE: invention relates to the industry of building materials and can be used in manufacturing products in civil and industrial construction, monolithic construction and for erection of special-purpose structures. The high-strength light concrete made from a concrete mixture contains portland cement, filler, a plasticiser, water, a mineral part consisting of microsilica with average particle size of 0.01-1 mcm, rock flour - a product of grinding quartz sand with specific surface area of 700-800 m2/kg and quartz sand with grain size of 0.16-0.63 mm, with the following ratio of components, wt %: portland cement 33.8-53.0, microsilica 4.77-13.8, rock flour 1.5-11.9, quartz sand 5.1…32.2 , microspheres 4.3-19.27, plasticiser 0.3-0.48, water - the balance.
EFFECT: obtaining concrete with high specific strength.
SUBSTANCE: invention relates to method of manufacturing fast setting light-weight cementing composition with improved compressive strength for building products such as panels. Method of obtaining light-weight cementing mixture, which has improved compressive strength and resistance to water, includes mixing water, cementing reacting powder, alkali metal salt of citric acid as set accelerator and light-weight filling agent, where weight ratio of water to reacting powder constitutes approximately 0.17-0.35:1.0, reacting powder includes 75-100 wt % of sol dust, which contains at least 50 wt % of fly ash of class C and 0-25 wt % of hydraulic cement and/or gypsum, setting of cementing mixture being achieved within from 4 to 6 minutes of composition mixing without addition of set retarder. Invention also deals with composition for obtaining light-weight cement panel.
EFFECT: obtaining light-weight cementing mixture, which has improved compressive strength and stability.
10 cl, 9 dwg, 9 tbl
SUBSTANCE: invention relates to a mixture of at least one polyol and at least one cyclohexane polycarboxylic acid derivative for reducing or minimising the dust emission when handling pulverulent construction chemical products, a method for preparing pulverulent construction chemical products and hydraulically setting materials containing the mixture according to the invention. The invention is developed in subclaims.
EFFECT: high efficiency of dust removal.
SUBSTANCE: invention relates to anchor for submersing anchoring underwater research hardware at bottom. Proposed anchor consists of flat self-breakable concrete body with central bore to accommodate underwater instruments retention and release. Note here that said body is made from raw stock of the following composition, in wt %: Portland cement - 26.0-56.0, high-alumina cement - 0.6-2.4, semiaquatic gypsum - 3.0-6.0, quartz sand making the rest, water for tempering to solid water ratio - 0.1-0.18. Note here that product of magnitudes of semiaquatic gypsum and high-alumina cement is selected, preferably, equal to 1.8-3.5. Invention is developed in dependent claims.
EFFECT: anchor of nonpolluting materials with self-controlled destruction in sea and sweet water.
3 cl, 16 dwg, 10 tbl
SUBSTANCE: decorative facing material contains, wt %: crushed sheet glass 75.0-77.0; ground tuff 18.0-19.0; liquid potassium glass 5.0-6.0.
EFFECT: high frost resistance of the decorative facing material.
SUBSTANCE: raw material mixture for natural stone imitation includes, wt %: Portland cement 26.0-30.0; sifted through No5 net carbonate sand 33.1-35.9; milled and sifted through No014 net broken ceramic products 8.0-10.0; lignosulfonate technical 0.2-0.3; sodium methylsiliconate 0.6-0.9; sienna 1.0-1.4; mummy 1.6-2.0; water 16.0-18.0.
EFFECT: increased strength of stone which imitates natural one.
SUBSTANCE: invention relates to application of derivatives of cyclohexanepolycarboxylic acids for reduction or minimisation of dust emission in operating powder-like building chemical products, methods of obtaining powder-like building chemical products, and hydraulically binding materials, which contain derivatives of cyclohexanepolycarboxylic acids in accordance with the invention.
EFFECT: increase of dedusting efficiency.
28 cl, 5 ex, 3 tbl
SUBSTANCE: crude mixture for making artificial pumice contains, wt %: Gzhel sedimentary clay 35-47; kaolin 3-5; feldspar 3-5; chalk 5-7; water 20-25; ground silicate glass 20-25.
EFFECT: low firing of the crude mixture for making artificial pumice.
SUBSTANCE: object of invention is method of producing products from light-weight concretes, in which cement mortar is prepared with polymeric additive, is mixed with light filler, obtained mixture is placed in casing, mixture is compacted, casing is taken down and obtained products are unloaded. As polymeric additive, relative to cement weight 0.05-0.5% of oligomeric complex polyether and 0.025-0.5% of polyacrylamide are introduced into cement mortar. Product from light-weight concrete, produced in such way, is the second subject of the invention.
EFFECT: addition of high thixotropic properties to cement mortar, ensuring high adhesion degree and moistening by cement mortar of granules and particles of light filler and microfibers, prevention of water diffusion from cement mortar into volume of light mineral filler particles.
SUBSTANCE: mixture for obtaining construction material relates to construction materials, made from industrial wastes and used in construction of road foundation inside commercial sites, roads, banking of well site foundations, as well as foundations for waste dumps. Mixture for obtaining construction material includes drilling waste, sorbent to 25.0% of drilling waste volume, as such used is penoizol and/or netrosorbolit and/or sorbolit and/or ashes and slag mixtures, mineral filling agent in form of thermally neutralised proppant to 50.0% of drilling waste volume, and/or natural non-cohesive soils to 65.0% of drilling waste volume, as hardener used is, at least, one of: burnt drilling waste in form of thermally processed sludge to 20% of drilling waste volume and/or cement from 5% to 20% of drilling waste volume and/or calcium-containing additive to 20% of drilling waste volume, and/or sodium liquid glass to 15.0% of drilling waste volume and/or gypsum to 30% of drilling waste volume, structure shaper includes mixture of carbamide resin and soda ash in equal weight parts to 6% of drilling waste volume, in addition, mixture contains exsiccant in form of peat in amount to 35% of drilling waste volume, as calcium-containing additive also used is caustic lime to 25% of drilling waste volume.
EFFECT: reduction of cost with simultaneous increase of environment protection, frost-resistance, saving of natural resources, obtaining cheap inert construction material.
3 cl, 10 tbl, 10 ex
FIELD: transport building, in particular concrete block for lining of highway constructions, preferably headings.
SUBSTANCE: claimed block is formed from concrete mixture containing (kg/m3 concrete mixture): cement - 300-370; granite chip of grade 5-10 mm and 10-20 mm in ratio of 1:1.8-2.35, respectively, - 1100-1210; quartz sand of grade from 0.16 to 5 mm containing the next total knocking (mass %) 2.5 mm - 3.2-6.0; 1.2 mm - 12.8-16.2; 0.6 mm - 35.8-54.1; 0.3 mm - 70.4-89.3; 0.16 mm - 100 - 650-750; granite sand from screening with particle size up to 5 mm - 60-75; milled quartz sand with specific surface of 2200-3500 cm2/g as filler - 30-100; water - 125-143.3; and superplasticizer - 0.8-1.0 % calculated as cement mass.
EFFECT: block of improved strength, freeze-resistance, water impermeability, and crack resistance.
FIELD: building materials, in particular mortar and concrete mixtures.
SUBSTANCE: claimed plasticizing agent comprises (contains (mass %)): triethanolamine 0.01-0.05; silver nitrate 0.001-0.005; and balance: soap-alkali solution from vegetable oil production containing 0.01-0.5 mass % of free PO
EFFECT: concrete mixture with improved frost-resistance and flowability without losses of strength.
21 ex,2 tbl
FIELD: manufacture of building materials.
SUBSTANCE: method provided by invention is characterized by jointly grinding two clinkers, dividing thus resulting cement into two streams, jointly mixing cement from one and the other streams with sand and additive, and determining parameter En, i.e. exergy of resulting mix equal to sum of amount-exergy products for each of mix components. The latter parameter is assumed as governed and exergy of cement streams is assumed as governing. When calculated exergy of mix goes below from its specified value, amount of cement in stream with higher exergy is increased and, when calculated exergy exceeds its specified value, amount of sand is increased.
EFFECT: facilitated on-line process control.
FIELD: manufacture of building materials.
SUBSTANCE: complex additive for quick-hardening mix, including filling mixes for filling mine workings, etc. Additive including water additionally contains sodium chloride, 1.5-3.0%, bischofite, 1.5-3.0%, and oligomeric acetone/formaldehyde condensation product, 0.1-0.3%.
EFFECT: increased mobility of mix and increased strength in early natural curing time.
FIELD: reinforced concrete blocks for precast lining of highway tunnels; erection of transport structures.
SUBSTANCE: proposed reinforced concrete block is made from concrete mix containing cement, crushed stone of 5-10-mm and 10-20 mm fractions, sand, plasticizing agent, filler and water; use is made of granite crushed stone at ratio of fractions 5-10 mm and 10-20 mm equal to 1:2.17-2.35; quartz sand contains fractions from 0.16 to 5 mm at the following total screening residues, mass-%: 2.5 mm -3.2-6.0; 1.2 mm - 12.8-16.2; 0.6 mm - 35.8-54.1; 0.3 mm - 70.4-89.3; 0.16 mm - 100; mix contains also granite sand from screenings up to 5 mm in size; used as plasticizing agent is super-plasticizing agent C-3; used as filler is ground quartz sand at specific surface of 2200-3500 cm2/g and additive at the following consumption of components per cubic meter of concrete mix, kg: cement, 300-370; crushed stone, 1100-1210; quartz sand, 650-750; granite sand, 60-75; ground quartz sand, 20-100; water, 125-143.3; super-plasticizing agent C3, 0.8-1.0 of mass-% of cement; additive, 0.1-0.3 of mass-% of cement.
EFFECT: enhanced strength, freeze resistance, water resistance and crack resistance of blocks.
FIELD: industry of building materials.
SUBSTANCE: invention relates to a building material mixture. The building material mixture comprises material chosen from the group consisting of gypsum, calcium hydroxide, cement and their mixtures, and also - polysaccharide or derivative of polysaccharide with particles size less 15 mcm taken in the amount 2 weight % maximally, particles size less 10 mcm taken in the amount 2 weight % maximally, and particles size less 5 mcm taken in the amount 1 weight % maximally, and if necessary the mixture comprises quartz sand or lime sand, water repellant, synthetic dispersion powder, cellulose fibers and/or synthetic fibers, pore-forming additive and light filling agents in the following ratio of components, weight %: material from the group containing gypsum, calcium hydroxide, cement or their mixtures, 1-99.99; polysaccharide or derivative of polysaccharide, 0.001-5; quartz sand or lime sand, up to 90; synthetic dispersion powder, up to 10; light filling agents, up to 10; water repellant, up to 1; pore-forming additive, up to 0.1; cellulose fibers and/or synthetic fibers, up to 15 wherein the content of components that the mixture comprises when needed doesn't mean 0 simultaneously, and polysaccharide or derivative of polysaccharide is prepared by the known technology. Invention provides improvement of physical-chemical properties of building mixture.
EFFECT: improved properties of building material mixture.
6 cl, 11 tbl
FIELD: building materials industry; methods and equipment for the bricks manufacture.
SUBSTANCE: the invention is pertaining to the field of the building materials industry and may be used in production of bricks, including the facing brick, building stones, blocks and tiles. The technical result of the invention is the expansion of the assortment of the building bricks and the means for its production, provision of simultaneously of the heightened strength and the frost resistance the bricks, improvement of the bricks decorative effect of their front-face surface imitating the surface texture of the natural building stone. The given technical result is reached because the building wall bricks having the form of the monolithic polyhedron is manufactured out of the mixture having the humidity of 3-10 % and containing a chalkstone with the size of its particle of no more than 8 mm, portland cement of the grade of no less than 400 - as the binding substance, at their ratio (in mass %): the indicated chalkstone - 85.1-90.0, portland cement of the grade of no less than 400 - 10.0-14.9 by the mixture molding under the pressure of 15.0-20.9 MPa during 2-9.9 seconds and by the heat-moisture treatment or a by aging up to the mixture gains the strength amounting to no less than of 50 % from the grade strength of the a ready bricks. The invention gives the characteristic of the building bricks, the method of the bricks manufacture and the set of equipment used for the bricks production.
EFFECT: the invention ensures expansion of the assortment of the building bricks, simultaneously heightened strength and the frost resistance of the bricks, improvement of decorative effect of the bricks front-face surface imitating the surface texture of the natural building stone.
25 cl, 1 dwg, 1 ex
FIELD: manufacture of building materials.
SUBSTANCE: invention relates to manufacture of dry building mixes and directly concerns use of inorganic materials as aggregates of differing shape and granule size. In a dry building mix including crushed expanded-clay concrete (30-95%) and inorganic aggregate (5-70%), the latter is naturally occurring or synthetic wollastonite crushed to achieve needle-shaped grains.
EFFECT: enabled manufacture of building parts and coatings more suitable for exploitation under complicated conditions, in particular owing to elevated bend strength.
FIELD: industry of building materials.
SUBSTANCE: invention relates to compositions based on mineral binding agents. The composition for producing building materials based on the cement binding agent, water and carbon nanostructures comprises metal-containing carbon nanostructures consisting of a mixture of polyvinyl alcohol with copper (I) or copper (II) chloride chosen in the mole ratio = (1-20):1 that are heated up to temperature 300°C in taken in the following ratio of components in the composition, wt.-%: cement binding agent, 15-75; indicated metal-containing carbon nanostructures, 0.01-2.5, and water, the balance. The composition can comprise additionally from 2 to 10 wt.-% of organic binding agent or technological additives chosen in the ratio = (1-6):1 mas. p. p. to the cement binding agent content. Invention provides enhancing physical-mechanical indices, in particular, the compression strength value and reducing energy consumption and the material prepared cost. Invention can be used in industry of building materials in making block and monolith concrete, polymer-cement mortars, foam concrete, slate, stucco and finishing covers also.
EFFECT: improved and valuable technical properties of composition.
3 cl, 2 tbl, 2 dwg, 6 ex
FIELD: construction engineering; manufacture of precast concrete and reinforced concrete products including underground products; monolithic house-building.
SUBSTANCE: proposed complex additive contains cement, powder-like superplasticizer C-3, alumino-silicate component in form of zeolite and micro-silica at the following ratio of components, mass-%: cement, 80-85; superplasticizer C-3, 2.0-3.5; micro-silica, 10-12; the remainder being zeolite. Method proposed for production of concrete mix includes grinding of components to specific surface of 4500-5000 cm2/g in disintegrator-type aerodynamic activator at rotational speed of 3000-6000 rmp; prior to grinding, components of concrete mix are loaded in cyclic-action mixer and are being mixed for 10-15 min. Production line proposed for realization of this method includes bins for storage and delivery of components which are interconnected with mixers for dry mixes by material lines via proportioners; said mixer is connected with aerodynamic activator by means of product lines. Specification gives versions of aerodynamic activator.
EFFECT: reduced consumption of cement at retained strength characteristics of cement due to enhanced activation of additive.
6 cl, 3 dwg, 1 tbl, 4 ex