SUBSTANCE: concrete mixture includes Portland cement, crushed granite, quartz sand, a microfiller, a superplasticiser based on polycarboxylates and water. Additionally into the mixture introduced is TTP fly ash, as the microfiller used is ground limestone MP-1, and as the superplasticiser, based on polycarboxylates MC-RowerFlow 2695, with the following component ratio, wt %: Portland cement 8-10, ground limestone MP-16-8, TPP fly ash 3-6, quartz sand with the coarseness module Mc 1.9 30-40, crushed granite of fraction 3-10 mm 15-18, crushed granite of fraction 5-20 mm 14-16, the superplasticiser based on polycarboxylates MC-RowerFlow 2695 0.0015-0.003, water - the remaining part.
EFFECT: increase of concrete quality due to increased fluidity of the concrete mixture and its self-compaction.
The invention relates to the composition of the raw mix for concrete with high density, the absence of large pores reduces the risk of corrosion of the concrete, which increases the durability of concrete, and the possibility of its use in harsh environments and can be used for the production of high quality concrete.
Known patent: "Concrete composition for the production of construction materials, Torreblanca and cementation works containing Portland cement, superplasticizer C-3, condensed silica fume with a specific surface area (15-25)·103cm2/g quartz sand fraction less than 0.14 mm and 1.25-2.50 mm, ground quartz sand with a specific surface area (3.5 to 4.0)·103cm2/g, the complex additive is the product of a collaborative intensive dry milling to specific surface area (4.0 to 4.5)·103cm2/g aluminate clinker cement brand "500" or "600" with the share of tricalcium aluminate With3Al it 8-12%, quartz sand with a specific surface area (1.5 to 2.5)·103cm2/g dry powder superplasticizer C-3, taken in the ratio 5:4:1, respectively, the reinforcing component - chrysotile and grinding dust - waste production of asbestos products and water in the following ratio, wt.%:
|Quartz sand fraction less than 0.14 mm||20,0-21,0|
|Quartz sand fractions of 1.25-2.50 mm||28,0-31,0|
|Specified ground quartz sand||6,5-8,0|
|Specified complex additive||2,5-3,0|
|Grinding dust is a waste product|
RF patent for the invention №2365554, MKI: C04B 28/04, date of publ. 27.08.2009.
Also known patent "Cement with low water and the method thereof", containing Portland cement, mineral filler in the form of siliceous material and organic dewatering reagent, characterized in that it further as the mineral filler is taken carbonate-bearing material with a grain of calcium carbonate at least 60%, when the ratio of siliceous material and carbonate-bearing material 5:95-95:5, all components are taken in the following ratio, wt.%:
|and siliceous materials||30-50|
Organic dewatering reagent of 0.3 to 3.0% by weight of cement with low water
RF patent №2373163 MCI: C04B 7/00, C04B 7/52 date publ. 20.11.2009.
The closest analogue of the claimed invention is "Raw mix for the production of high-strength concrete with Portland cement, crushed stone, silica sand, silica fume or quartz it, superplasticizer based polycarboxylate ether and water, characterized in that it contains crushed granite as a superplasticizer based on polycarboxylate ether - Glenium 51 or Glenium ACE 30 and additionally PASCH - adipinate sodium and calcium formate in the following ratio of components, kg/m3concrete:
|Microsilica or silica it||7-130|
Specified superplasticizer of 0.10 to 3.0 wt.% from Portland
PASCH 0.01 to 0.07 wt.% from Portland cement, calcium formate 0.5 to 3.0 wt.% from Portland cement.
RF patent for the invention №2363680 MCI: C04B 28/04, date of publ. 10.08.2009
The disadvantages of the above-described concrete mixes is that they use superplasticizers in high dosages, which slows down time of setting of concrete mixtures. The effect of plasticization is reduced by 60-90 minutes, and other mobile mixture is stratified, which creates heterogeneity in the designs.
Polycarboxylate - modifier adsorbed on the surface of cement grains and mineral component, which leads to higher and more prolonged plasticization. With constant stirring effect is not lost, and is extended by 3-4 times. The surface of the grains for free access of water and the reaction of hydration.
To maintain high yield and prevent stratification of the mixture should be of a certain viscosity in the mixture is introduced mineral Supplement, which is e activates the processes of hydration and increases the water holding capacity of the mixture.
Therefore, the proposed as an invention of a concrete mix using a superplasticizer based polycarboxylates developed in 2012
The technical result of the invention is to improve the quality of concrete due to its fluidity and self-packing by introducing into the composition of the concrete mix superplasticizer based polycarboxylates MC-PowerFlow 2695 at a certain composition of other ingredients.
The achievement of this technical result is ensured by the fact that "Concrete mix" includes Portland cement, crushed granite, quartz sand, microanatomical, superplasticizer based polycarboxylates and water. While it is additionally injected fly ash CHP, microanatomical - ground limestone MP-1, and as a superplasticizer based polycarboxylates MS-RowerFlow 2695, in the following ratio, wt.%:
|Ground limestone MP-1||6-8|
|Ash CHP GOST 25818-91||3-6|
|Quartz sand (fraction of 1.9 MK)||30-40|
|Crushed granite fractions 3-10 mm|
|Crushed granite fraction 5-20 mm||14-16|
|Superplasticizer based polycarboxylates|
Apply ground limestone MP-1, respectively GOST in 52129-2003 - with a fineness of less than 1.25 mm
Superplasticizer based polycarboxylates, (MS-PowerFlow 2695) or (MC-PowerFlow 2695), THE 5745-168-51552155-2012, is an aqueous solution of polycarboxylate and shall comply with GOST 24211. Optimally selected mixture component proposed as the invention of concrete mixture in combination with a dosage above superplasticizer (MS-PowerFlow 2695) (0,0015-0,003) wt.% promotes self sealing concrete, without the influence of additional compactible energy independently under the influence of its own mass flows are exempt from the contained air and completely fills the space of the casing with reinforcing cage.
In many respects the properties of the resulting concrete on the basis of this superplasticizer coincide with the properties of conventional concrete. However, at the same cement content and odocument the ratio it has a higher compressive strength due to a more dense mixture. Also in the structures due to the high mobility of the mixture is more dense adhesion to reinforcement bars. This concrete has a perfectly smooth and even surface, repeating the surface casing, which gives the opportunity to use it in designs of any shape. Increased density, the absence of large pores reduces the risk of corrosion of the concrete, thus improving the quality of concrete increases its durability and ability to use concrete in aggressive environment.
A specific example of the preparation of the concrete mixture.
Consumption of materials concrete mix: wt%:
|Portland cement cem I 42.5 N||9|
|Ground limestone MP-1 GOST 52129-2003||7|
|Ash CHP GOST 25818-91 -||4,5|
|Sand quartz sand (fineness modulus of 1.9 MCR)||35|
|Crushed granite fractions 3-10 mm||16,5|
|Crushed granite fraction 5-20 mm||15|
|Superplasticizer based polycarboxylates|
The above average values of the intervals of the ingredients of the concrete mix to give optimum quality characteristics shown in the table.
The qualitative characteristics of the proposed concrete mixture are summarized in table.
|number of||Brand concrete waterproofing||Mark concrete frost resistance||Strength, MPa 7 days||Strength, MPa 28 days||RASPLAV cone, cm|
For the above concrete mix in the mixer dispense microanatomical - ground limestone, fly ash, power plant, quartz sand and crushed granite of both factions in conjunction with Portland cement and mix for 20 seconds. Then enter part of the mixing water and the superplasticizer is added and stirred for another 30 seconds. Additives regulating the viscosity, enter the last portion of water. Supplements are not ledue is to enter directly into the dry mixture; they need to be injected with mixing water. Due to the high efficiency of polycarboxylates you should regularly check the functioning of the dispensers. During production it is important to take into account changes in the moisture content of the aggregates, the change of particle size distribution of the aggregates and to change the order of dosing.
The resulting concrete mixture has the following advantages compared with the known brands such concretes:
1. Low water / cement ratio of 0.37 to 0.4) at high workability (RASPLAV cone to 70 cm).
2. Increase the life of the structures (increased density)
3. Failure from vibration and, consequently, reducing noise levels at the site, the reduction of energy consumption.
4. Improving the quality of the surface, does not require additional finishing, the device capability seamless durable industrial floors.
5. The increase in time of preservation mixtures, the possibility of increasing transport the mixture from the concrete node to the object.
The above test results indicate that self-compacting concrete mix according to the invention has high workability, is mobile, and the resulting concrete has a high frost resistance and water resistance, is not inferior to the known strength concretes, while supplies is on cement in the mixture is much lower.
Unlike other self-compacting concrete is still in the fact that compared to the concrete mix with high quality concrete, 60 MPa and above. The present invention was obtained concrete strength of 34.5 MPa. The proposed concrete mixture can be widely used in construction.
Concrete mix including Portland cement, crushed granite, quartz sand, microanatomical, superplasticizer based polycarboxylates and water, characterized in that it additionally contains fly ash CHP, as microsatellites - ground limestone MP-1, and as a superplasticizer based polycarboxylate - MS-RowerFlow 2695, in the following ratio, wt.%:
|Ground limestone MP-1||6-8|
|Quartz sand with fineness modulus Mto=1,9||30-40|
|Crushed granite fractions 3-10 mm||15-18|
|Crushed granite fraction 5-20 mm||14-16|
|Superplasticizer based on poly is carboxylato|
SUBSTANCE: concrete mix contains, wt %: Portland cement - 25-28, crushed stone - 20-22, sand - 18-20, molybdenum-containing wastes - 8-10, distiller's dried grain with solubles - 20-29.
EFFECT: higher concrete strength.
SUBSTANCE: raw mix for making concrete includes, wt %: Portland cement 24-26; granite siftings passing through sieve No. 5 - 45.4-51.5; superplasticiser S-3 - 0.5-0.6; steel chips, produced as a result of processing of steel blanks on turning machines 4-6.
EFFECT: higher concrete strength.
SUBSTANCE: raw mixture for production of fine grained concrete contains, pts. wt.: portland cement 26.0-28.0; ash from combustion of brown or black coal 71.1-73.1; capron fibre sliced into pieces of 25-50 mm 0.2-0.4; sodium methyl siliconate or sodium ethyl siliconate 0.5-0.7, at water-cement ratio of 0.45-0.5.
EFFECT: increase of strength at the decrease of cement consumption.
SUBSTANCE: mixture contains the following components, wt %: general construction Portland cement CEM I 42.5 32.5-34.5, alumina cement 8.1-8.6, modified by the form fractionated and dressed wastes of mining enterprise production 41.0-42.4, a plasticising additive based on polycarboxylate ethers 0.20-0.25, an active mineral additive microsilica 4.0-4.5, a polypropylene biocomponent fibre 0.03-0.05, water - the remaining part.
EFFECT: obtaining concrete of high early strength with high indices of frost resistance, waterproofing and toughness.
SUBSTANCE: concrete mixture comprises, pts. wt. artificial cement 23.0-25.0, fraction expanded clay 10-20 mm 20.0-26.0, keramsite sand 20.0-24.0, fine quartz sand 5.6-7.4, asbestos fibre sliced into segments of 5-25 mm 0.2-0.3, sodium ethyl siliconate 0.2-0.3, water 23.0-25.0.
EFFECT: increase of concrete frost resistance.
SUBSTANCE: concrete mixture comprises, pts. wt.: artificial cement 25.0-27.0; ash and slag filler 53.4-57.8; indicated crumb of polyethylene foam 0.15-0.25; water 16.0-18.0; capron fibre cut into lengths of 5-15 mm 0.15-0.25; superplasticising admixture C-3 0.8-1.2, besides ash and slag filler is characterised by the following grain size composition, pts. wt.: particles larger than 0.63 mm - 0.2; larger than 0.315 mm, but smaller than 0.63 mm - 4.8; larger than 0.14 mm, but smaller than 0.315 mm - 62; smaller than 0.14 mm - 33.
EFFECT: increase of water-resisting property.
SUBSTANCE: invention relates to building materials and can be used in applying fire-retardant coatings on building structures. The fire-retardant composition in form of a water-tempered dry mixture for applying coatings is characterised by that it contains, wt %: portland cement 20.0-60.0, expanded vermiculite 10.0-40.0, chrysotile asbestos 5.0-25.0, chamotte 5.0-25.0, expanded pearlite 10.0-30.0, polyfunctional concrete modifier 0.1-1.0, fine water-soluble adhesive 2.0-8.0 and a water-retaining additive 0.1-3.0.
EFFECT: improved crack resistance owing to strain redistribution on the whole material.
SUBSTANCE: preparation method consists in that molybdenum scheelite wastes in an amount of 9-10% and an organic substance - crushed corncobs - 7-8% are additionally added to portland cement in an amount of 25-30%, chip 12-15% and sand 15-18% , the rest is water.
EFFECT: increase of the concrete strength and improvement of production of ecologically safe products.
SUBSTANCE: dry construction mixture contains components with the following ratio, pts. wt.: portland cement 0.75-1, quartz sand with fineness ratio equal to 0.95-1.05, 2.9-3.0, ferruginous hydrated cake, ground to pass through the sieve with holes of 0.2 mm, 0.3 - 0.55.
EFFECT: increase of water holding capacity and plastic properties of a solution mixture, raw material base expansion, cost reduction, recycling of industry wastes and improvement of ecological situation.
SUBSTANCE: concrete mixture comprises, pts. wt. portland cement 26-28, expanded perlite sand, crushed to pass through the mesh No. 014, 29.7-37.7, fine quartz sand 12-16, sodium methylsiliconate or sodium ethyl silicate 0.2-0.3, water 24-26.
EFFECT: increase of strength of concrete units.
SUBSTANCE: dry building mixture for monolithic-type building construction, which includes Portland cement, alumina cement, hydrated lime, gypsum, quartz sand, filler, re-dispersed polymer, cellulose ester, antifoaming additive, superplasticising agent, hardening agent, retarding agent, contains bauxite cement as alumina cement, hemihydrate plaster as gypsum, quartz sand with fineness modulus of up to 1.2, filler with specific surface area S sp 2.5-2.8 cm2/g, which contains 5-7 wt % of nanoparticles, polycarboxylate superplasticising agent and in addition high-molecular chitosan at the following component ratio, wt %: Portland cement - 12-33, bauxite cement - 12-19, hydrated lime - 0.3-0.5, hemihydrate plaster - 2.5-6, quartz sand with fineness modulus of not more than 1.2 - 30-50, the above filler - 5-18, re-dispersed polymer - 4-6, cellulose ester - 0.1-0.17, antifoaming additive - 0.1-0.3, polycarboxylate superplasticising agent - 0.2-0.3, hardening agent - 0-0.5, retarding agent - 0-3.5, high-molecular chitosan (200-250 kDa) - 1-2 wt % of Portland cement weight.
EFFECT: increasing sedimentation stability of water-based building mixture; improving impact strength and reducing abrasion of hardened mixture.
SUBSTANCE: invention relates to a method of preparing a hardening accelerator composition by reacting a water-soluble calcium compound with a water-soluble silicate compound and a method of preparing a hardening accelerator composition by reacting a calcium compound with a silicon dioxide-containing component in an alkaline medium, in both cases the reaction of the water-soluble calcium compound with the water-soluble silicate compound being carried out in the presence of an aqueous solution which contains a water-soluble comb polymer suitable as a plasticiser for hydraulic binders. The invention also relates to a composition of calcium silicate hydrate and comb polymer, use thereof as a hardening accelerator and for reducing permeability of hardened mixtures.
EFFECT: obtaining a hardening accelerator having plasticiser properties, which is capable of increasing strength and wear resistance.
41 cl, 12 tbl, 3 dwg
SUBSTANCE: claimed invention relates to application as additive, which improves processability of water formulation with hydraulic binging agent base of: a) at least, one (meth)acryl crest-branched copolymer, which has, at least, one side chain, which carries, at least, one alkoxy- or hydroxypolyalkylenglycol hydrophilic group, b) at least, one ASE (alkaline-soluble emulsion) acryl copolymer. Invention also relates to water formulation with hydraulic binding agent base, which contains as additive, which improving its processability: a) at least, one (meth)acryl crest-branched copolymer, which has, at least, one side chain, carrying, at least, one alkoxy- or hydroxypolyalkylenglycol hydrophilic group, b) at least, one ASE - alkaline-soluble emulsion acryl copolymer. Invention is advanced in dependent i.i. of invention formula.
EFFECT: improvement of processability of claimed formulation without manifestation of segregation effect.
22 cl, 10 ex, 1 tbl
SUBSTANCE: invention relates to production of construction materials, particularly a fine-grained concrete mixture and a preparation method thereof, and can be used to make concrete structures, both monolithic and assembled, that used in the industry of construction materials and construction. In the method of preparing a fine-grained concrete mixture, which involves pre-modification of the surface of an aggregate, followed by mixing said aggregate with cement and water, the modifier used is alkyldimethylbenzylammonium chloride in amount of 0.1% of the mass of cement, and the aggregate used in ratio of 1:1 is a mixture of quartz sand with fineness modulus of 1.9 and screenings from grinding rocks from the Argun deposit with grain size of 5-10 mm, with the following ratio of components, wt %: cement - 19-25, aggregate - 68-75, water 6-7. The disclosed fine-grained concrete mixture is prepared using said method.
EFFECT: obtaining a fine-grained concrete mixture with improved physical-mechanical and operational properties based on an aggregate made from local material.
1 tbl, 2 cl
SUBSTANCE: mixture for gluing tiles is intended for gluing ceramic tiles and plates from natural stone and contains, wt %: Portland cement - 30-34.5, quartz sand - 55-59.5, limestone - 5-7, cellulose ether - 0.20-0.25, copolymer of vinylacetate and vinylversatate - 1.0-1.5, copolymer of melamine sulphoacid and formaldehyde - 0.3-0.5, calcium formate - 1.0-1.2.
EFFECT: improvement of mixture wetting capacity and increase of strength of its cohesion with glued surface on the first day of solidification.
SUBSTANCE: invention relates to the industry of construction materials and can be used in preparing complex additives for making concrete and reinforced concrete articles and structures. The engineering problem of the invention is improving workability of concrete mixtures, increasing concrete strength (in the early stages and later stages of hardening), water impermeability and frost resistance. The problem is solved by that the plasticiser used is a powdered compound selected from: technical lignosulphonate, a superplasticiser based on a sodium salt of naphthalene sulphonic acid and C-3 formaldehyde, a mixture of said plasticisers in equal amounts, and liquid glass as a silica-containing component, wherein at the beginning, said powdered plasticiser is stirred in water until obtaining a solution with concentration of 35-40%, followed by addition of liquid glass in an amount which enables to obtain a ready complex additive with concentration of 60-70%. When using one of said plasticisers as aqueous solution, it is mixed with liquid glass until obtaining a ready complex additive with concentration of 60-70%.
EFFECT: complex additive can be prepared in any mixing equipment.
2 cl, 1 tbl
SUBSTANCE: invention relates to construction materials and can be used as mortar for making penetrating-action waterproof coating. The building mortar contains: portland cement 25-27, alumina cement 8.1-8.3, construction sand with particle size of 0.63 mm 36.0-36.5, dolomite limestone with particle size of 100 mcm 7.9-8.3, bentonite clay additive 0.7-0.8, water 16.2-16.6, and a complex additive 4.1-4.5, with the following ratio of components of the additive, wt %: acrylate copolymer Neolith 23.5-25.5; potassium sulphate 36.0-35.5; 20% silicic acid sol solution with pH 4 38.5-39.0.
EFFECT: high adhesion strength of the waterproof coating to the surface of the concrete base and high strength of the concrete base.
1 tbl, 1 ex
SUBSTANCE: invention relates to construction materials and can be used as mortar for making penetrating-action waterproof coating. The building mortar contains: portland cement 25.12-26.02, alumina cement 8.21-8.38, construction sand with particle size of 0.63 mm 38.38-38.53, dolomite limestone with particle size of 100 mcm 8.25-8.38, bentonite clay 0.74-0.84, water 16.47-16.72, and a complex additive 1.93-2.03, with the following ratio of components of the additive, wt %: acrylate copolymer Neolith 82.6-83.0; potassium sulphate 16.3-16.6; polycarboxylate powder ViscoCrete 225 0.7-0.8.
EFFECT: reduced segregation of the mortar, high compression strength, bending tensile strength and water impermeability of the waterproof coating.
SUBSTANCE: invention relates to the industry of construction materials and can be used in making concrete on an aggregate which contains active reactive silica. The complex organic additive contains superplasticiser S-3 and is characterised by that the superplasticiser S-3 is used in amount of 0.3% of the mass of cement and additionally contains citric acid in amount of 0.05% of the mass of cement.
EFFECT: preventing reaction of alkali in the cement with silica in the aggregate and controlling longevity of the concrete mixture.
SUBSTANCE: invention relates to composition of a complex additive for concrete mixtures and mortar and can be widely used in production of monolithic and prefabricated structures, primarily for hydraulic engineering structures and road concrete. The complex additive contains the following, (pts.wt): superplasticiser S-3 10-30, polyethylene glycol and/or propylene glycol with molecular weight of 250-3500 5-55, carbamide 10-60. In a special case, the complex additive further contains sodium formate, with the following ratio of components (pts.wt): superplasticiser S-3 10-30, polyethylene glycol and/or propylene glycol 5-55, carbamide 10-60, sodium formate 5-35.
EFFECT: high frost resistance of concrete in salts and high strength of concrete aged 28 days while maintaining and slightly improving properties, particularly cone slump.
5 ex, 1 tbl
SUBSTANCE: invention relates to construction and may find application when a heat insulation coating is applied onto walls of industrial and civil buildings and structures. A composition for heat insulation of building structures comprises, parts: butadiene styrene stabilised latex SKS-65GP grade "B" 100, ground haydite with volume mass of 600-700 kg/m3 of fraction of 0-0.315 mm 60-75 and 0.315-2.5 mm 140-175, waste from crushing of cellular concrete of autoclave hardening of fraction 0-0.315 mm 30-36 and 0.315-2.5 mm 70-84, bone glue 0.4-0.5, gum spirit 3-5, casein glue 1-3, saponified pine tar 0.05-0.1, water 10-15.
EFFECT: increased frost resistance and weather resistance.
6 tbl, 23 ex