CN112010626A - Self-compacting freeze-thaw-resistant concrete and preparation method thereof - Google Patents
Self-compacting freeze-thaw-resistant concrete and preparation method thereof Download PDFInfo
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- CN112010626A CN112010626A CN202010961499.8A CN202010961499A CN112010626A CN 112010626 A CN112010626 A CN 112010626A CN 202010961499 A CN202010961499 A CN 202010961499A CN 112010626 A CN112010626 A CN 112010626A
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- 239000004567 concrete Substances 0.000 title claims abstract description 141
- 238000002360 preparation method Methods 0.000 title description 12
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 72
- 239000010959 steel Substances 0.000 claims abstract description 72
- 239000002893 slag Substances 0.000 claims abstract description 71
- 239000000843 powder Substances 0.000 claims abstract description 35
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 34
- 239000002912 waste gas Substances 0.000 claims abstract description 29
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000004568 cement Substances 0.000 claims abstract description 21
- 239000002518 antifoaming agent Substances 0.000 claims abstract description 16
- 239000002562 thickening agent Substances 0.000 claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000000440 bentonite Substances 0.000 claims abstract description 14
- 229910000278 bentonite Inorganic materials 0.000 claims abstract description 14
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000010440 gypsum Substances 0.000 claims abstract description 14
- 229910052602 gypsum Inorganic materials 0.000 claims abstract description 14
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000000292 calcium oxide Substances 0.000 claims abstract description 12
- 235000012255 calcium oxide Nutrition 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims abstract description 12
- 235000019353 potassium silicate Nutrition 0.000 claims abstract description 12
- 239000004576 sand Substances 0.000 claims abstract description 12
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000005543 nano-size silicon particle Substances 0.000 claims abstract description 10
- 235000012239 silicon dioxide Nutrition 0.000 claims abstract description 10
- 239000000463 material Substances 0.000 claims abstract description 9
- 239000002699 waste material Substances 0.000 claims description 30
- 239000000203 mixture Substances 0.000 claims description 19
- 238000007885 magnetic separation Methods 0.000 claims description 12
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 9
- 238000005056 compaction Methods 0.000 claims description 7
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 6
- 229920002401 polyacrylamide Polymers 0.000 claims description 6
- 238000012216 screening Methods 0.000 claims description 6
- BNIILDVGGAEEIG-UHFFFAOYSA-L disodium hydrogen phosphate Chemical compound [Na+].[Na+].OP([O-])([O-])=O BNIILDVGGAEEIG-UHFFFAOYSA-L 0.000 claims description 4
- 239000002994 raw material Substances 0.000 claims description 4
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 claims description 4
- LNAZSHAWQACDHT-XIYTZBAFSA-N (2r,3r,4s,5r,6s)-4,5-dimethoxy-2-(methoxymethyl)-3-[(2s,3r,4s,5r,6r)-3,4,5-trimethoxy-6-(methoxymethyl)oxan-2-yl]oxy-6-[(2r,3r,4s,5r,6r)-4,5,6-trimethoxy-2-(methoxymethyl)oxan-3-yl]oxyoxane Chemical compound CO[C@@H]1[C@@H](OC)[C@H](OC)[C@@H](COC)O[C@H]1O[C@H]1[C@H](OC)[C@@H](OC)[C@H](O[C@H]2[C@@H]([C@@H](OC)[C@H](OC)O[C@@H]2COC)OC)O[C@@H]1COC LNAZSHAWQACDHT-XIYTZBAFSA-N 0.000 claims description 3
- 229920001732 Lignosulfonate Polymers 0.000 claims description 3
- 239000004117 Lignosulphonate Substances 0.000 claims description 3
- 229920002774 Maltodextrin Polymers 0.000 claims description 3
- 239000005913 Maltodextrin Substances 0.000 claims description 3
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 3
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 3
- 230000000740 bleeding effect Effects 0.000 claims description 3
- 159000000007 calcium salts Chemical class 0.000 claims description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 3
- 239000007789 gas Substances 0.000 claims description 3
- 239000001866 hydroxypropyl methyl cellulose Substances 0.000 claims description 3
- 229920003088 hydroxypropyl methyl cellulose Polymers 0.000 claims description 3
- 235000010979 hydroxypropyl methyl cellulose Nutrition 0.000 claims description 3
- UFVKGYZPFZQRLF-UHFFFAOYSA-N hydroxypropyl methyl cellulose Chemical compound OC1C(O)C(OC)OC(CO)C1OC1C(O)C(O)C(OC2C(C(O)C(OC3C(C(O)C(O)C(CO)O3)O)C(CO)O2)O)C(CO)O1 UFVKGYZPFZQRLF-UHFFFAOYSA-N 0.000 claims description 3
- 235000019357 lignosulphonate Nutrition 0.000 claims description 3
- 229940035034 maltodextrin Drugs 0.000 claims description 3
- 229920000609 methyl cellulose Polymers 0.000 claims description 3
- 239000001923 methylcellulose Substances 0.000 claims description 3
- 235000010981 methylcellulose Nutrition 0.000 claims description 3
- 235000011007 phosphoric acid Nutrition 0.000 claims description 3
- 229920001495 poly(sodium acrylate) polymer Polymers 0.000 claims description 3
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 3
- GCLGEJMYGQKIIW-UHFFFAOYSA-H sodium hexametaphosphate Chemical compound [Na]OP1(=O)OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])O1 GCLGEJMYGQKIIW-UHFFFAOYSA-H 0.000 claims description 3
- 235000019982 sodium hexametaphosphate Nutrition 0.000 claims description 3
- NNMHYFLPFNGQFZ-UHFFFAOYSA-M sodium polyacrylate Chemical compound [Na+].[O-]C(=O)C=C NNMHYFLPFNGQFZ-UHFFFAOYSA-M 0.000 claims description 3
- 159000000000 sodium salts Chemical class 0.000 claims description 3
- 235000019832 sodium triphosphate Nutrition 0.000 claims description 3
- VQIDGTFLGAAJGI-UHFFFAOYSA-M sodium;prop-1-ene-1-sulfonate Chemical compound [Na+].CC=CS([O-])(=O)=O VQIDGTFLGAAJGI-UHFFFAOYSA-M 0.000 claims description 3
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 claims description 3
- 229910000406 trisodium phosphate Inorganic materials 0.000 claims description 3
- 235000019801 trisodium phosphate Nutrition 0.000 claims description 3
- 229940051841 polyoxyethylene ether Drugs 0.000 claims description 2
- 229920000056 polyoxyethylene ether Polymers 0.000 claims description 2
- -1 sodium phosphate tetranitrate Chemical compound 0.000 claims description 2
- 230000008569 process Effects 0.000 abstract description 7
- 230000036571 hydration Effects 0.000 abstract description 6
- 238000006703 hydration reaction Methods 0.000 abstract description 6
- 150000001875 compounds Chemical class 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 230000000295 complement effect Effects 0.000 abstract description 3
- 238000001879 gelation Methods 0.000 abstract 1
- 238000003756 stirring Methods 0.000 description 4
- 230000010355 oscillation Effects 0.000 description 3
- 239000011376 self-consolidating concrete Substances 0.000 description 3
- 239000001488 sodium phosphate Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 239000002440 industrial waste Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 238000010257 thawing Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 229910000397 disodium phosphate Inorganic materials 0.000 description 1
- 235000019800 disodium phosphate Nutrition 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000004574 high-performance concrete Substances 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 229910000162 sodium phosphate Inorganic materials 0.000 description 1
- 235000011008 sodium phosphates Nutrition 0.000 description 1
- 238000009955 starching Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- CDVLCTOFEIEUDH-UHFFFAOYSA-K tetrasodium;phosphate Chemical compound [Na+].[Na+].[Na+].[Na+].[O-]P([O-])([O-])=O CDVLCTOFEIEUDH-UHFFFAOYSA-K 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/24—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing alkyl, ammonium or metal silicates; containing silica sols
- C04B28/26—Silicates of the alkali metals
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/08—Producing shaped prefabricated articles from the material by vibrating or jolting
- B28B1/082—Producing shaped prefabricated articles from the material by vibrating or jolting combined with a vacuum, e.g. for moisture extraction
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/08—Producing shaped prefabricated articles from the material by vibrating or jolting
- B28B1/087—Producing shaped prefabricated articles from the material by vibrating or jolting by means acting on the mould ; Fixation thereof to the mould
- B28B1/0873—Producing shaped prefabricated articles from the material by vibrating or jolting by means acting on the mould ; Fixation thereof to the mould the mould being placed on vibrating or jolting supports, e.g. moulding tables
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/50—Defoamers, air detrainers
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/29—Frost-thaw resistance
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
- C04B2201/52—High compression strength concretes, i.e. with a compression strength higher than about 55 N/mm2, e.g. reactive powder concrete [RPC]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Abstract
The invention relates to self-compacting freeze-thaw-resistant concrete which comprises, by weight, 150 parts of water 110, 50-150 parts of cement, 10-15 parts of nano silicon dioxide, 80-100 parts of waste gas concrete powder, 10-20 parts of slag steel, 5-10 parts of water glass, 5-10 parts of fine aluminum powder, 5-10 parts of bentonite, 5-10 parts of gypsum, 5-10 parts of quick lime, 20-30 parts of fine river sand, 2-4 parts of a defoaming agent, 1-3 parts of a thickening agent and 1-3 parts of a retarder. The waste gas concrete powder, the slag steel and the cement form the novel concrete, so that the cement consumption can be reduced, the production cost of the concrete is reduced, the waste gas concrete powder slag steel is compounded and doped into the concrete, the hydration process can be mutually excited to generate a compound gelation effect, the two mixed materials can fully play the advantages and complementary action of the waste gas concrete powder slag steel by taking the advantages and the disadvantages of the two mixed materials, the structural strength performance of the concrete can be effectively improved, the hydration temperature peak of the concrete cement can be reduced, and the durability of the concrete can be improved.
Description
Technical Field
The invention relates to concrete, in particular to self-compacting freeze-thaw resistant concrete and a preparation method thereof.
Background
With the rapid development of economy, house buildings are developed from the past low-rise and multi-rise buildings to the present day, and the multi-rise and high-rise buildings are the leading trend. The concrete quality comprises strength and appearance quality, the strength of the concrete can ensure the safe use of a building structure, the appearance quality can meet the usability and aesthetic requirements of buildings, and the position of the concrete in a steel structure-concrete structure is very important.
The self-compacting concrete is high-performance concrete which can be compactly formed under the action of self gravity without vibration (or slight vibration). Because of its excellent workability, do not need artifical extra vibration in the stage of pouring, rely on the dead weight can closely knit the mould that fills, can not only show the noise that reduces in the concrete construction, save the labour, improve production efficiency, also can solve the pitted skin that artificial factors such as the hourglass shakes, the excessive vibration in traditional concrete construction caused, the starching or because of the reinforcing bar is dense, the structure is complicated difficult to the vibration scheduling problem to improve the quality of concrete engineering. In the preparation process of the existing self-compacting concrete, although the self-compacting of the concrete can be realized, the self-compacting time of the existing self-compacting concrete is too long.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide self-compacting freeze-thaw resistant concrete and a preparation method thereof.
The technical scheme of the invention is as follows:
the self-compacting freeze-thaw-resistant concrete is characterized by comprising, by weight, 150 parts of water 110-one, 50-150 parts of cement, 10-15 parts of nano silicon dioxide, 80-100 parts of waste gas concrete powder, 10-20 parts of slag steel, 5-10 parts of water glass, 5-10 parts of fine aluminum powder, 5-10 parts of bentonite, 5-10 parts of gypsum, 5-10 parts of quick lime, 20-30 parts of fine river sand, 2-4 parts of a defoaming agent, 1-3 parts of a thickening agent and 1-3 parts of a retarder.
Furthermore, the raw materials comprise, by weight, 125 parts of water-120-.
Further, the defoaming agent is formed by mixing polyacrylamide and alkylphenol polyoxyethylene ether according to the ratio of 1: 1.
Further, the thickening agent is one or more of hydroxypropyl methyl cellulose ether, maltodextrin, polyacrylamide, sodium polyacrylate and sodium propenyl sulfonate.
Further, the retarder is one or more of methyl cellulose, calcium salt or sodium salt of lignosulphonate, sodium hexametaphosphate, phosphoric acid, sodium phosphate tribasic, sodium phosphate tetrabasic, disodium hydrogen phosphate, sodium tripolyphosphate, citric acid and polyvinyl alcohol.
Furthermore, the water reducing rate of the retarder is more than or equal to 15%, the bleeding rate ratio is more than or equal to 100%, and the gas content is less than or equal to 3.5%.
Further, the preparation method comprises the following steps:
s1, preparing waste gas concrete powder: selecting waste concrete blocks, adding the waste concrete blocks into a high-temperature furnace, and continuously treating for 30-45 minutes at the temperature of 120-; then, putting the waste concrete blocks into a stirrer, continuously introducing high-pressure air into the stirrer, and smashing the waste concrete blocks inside to obtain waste concrete powder;
s2, preparing slag steel: pre-crushing the steel slag refined in the furnace in a mechanical mode, and then baking until the steel slag is completely dried; then separating the large slag steel from the powdered steel slag, firstly carrying out magnetic separation on the large slag steel, and then extracting the slag steel after the steel slag is subjected to multistage crushing, screening and magnetic separation;
s3, putting cement, nano silicon dioxide, waste gas concrete powder, slag steel, water glass, fine aluminum powder, bentonite, gypsum, quick lime, fine river sand, a defoaming agent, a thickening agent and a retarder into a stirrer to be fully stirred to form a mixture;
and S4, pouring the mixture and water into a mold with an open square, compacting the concrete, and forming a concrete prefabricated body in the mold by using the mixture.
Further, the concrete operation method for compacting the concrete in the step S4 includes:
s41, placing the mould on a vibration disc, setting the vibration frequency of the vibration disc at 1000-2000 times per minute, controlling the vibration time at 30-60 seconds, and compacting the interior of the concrete through the vibration of the vibration disc;
s42, pressurizing the inside of the die for multiple times, wherein the first pressurization is 1.2atm for 10-15 seconds; the second pressurization is 1.5atm for 10-15 seconds; the third pressurization is 1.8atm for 10-15 seconds, and the vibration disc is kept vibrating at 1000-2000 times per minute;
s43, negative pressure is pumped into the mould, the negative pressure is pumped to 0.25atm for 10-15 seconds, and the vibration disc is kept vibrating at 1000-2000 times per minute.
Further, in the steps S41, S42, and S43, the vibration plate is further mounted to a circular motion device so that the vibration plate makes a circular motion at a speed of 10 seconds/turn.
By the scheme, the invention at least has the following advantages:
in the invention, the waste gas concrete powder slag steel belongs to industrial waste, and has low price and rich resources. The waste gas concrete powder, slag steel and cement form new concrete, not only can reduce the cement consumption, reduce the production cost of the concrete, but also mix the waste gas concrete powder slag steel compound into the concrete after, the hydration process can arouse each other and produce compound gel effect, two kinds of mixed materials get the advantages and complementary effect that can the full play waste gas concrete powder slag steel, can the effectual structural strength performance that improves the concrete, can reduce the concrete cement hydration temperature peak, improve the concrete durability, guarantee that the concrete structure after hardening is more closely knit.
Simultaneously use earlier vibration, malleation again, the technique that never sees before of negative pressure in the mould in the preparation, the vibration can make concrete itself from the compaction, and malleation and negative pressure homoenergetic simultaneously can further carry out the compaction to it, can further compress tightly the concrete through outside atmospheric pressure for concrete itself is compacter, also can accelerate the time that the concrete is closely knit simultaneously. The bentonite and the gypsum are introduced to ensure that the temples of the concrete have good binding force and have the effect of freeze thawing resistance.
In the process of compaction, in order to prevent large particles in the concrete from being concentrated on the bottom of the concrete in the vibration process, the vibration device is also circularly moved, so that the phenomenon is prevented.
The foregoing is a summary of the present invention, and in order to provide a clear understanding of the technical means of the present invention and to be implemented in accordance with the present specification, the following is a detailed description of the preferred embodiments of the present invention.
Detailed Description
The following examples are given to further illustrate the embodiments of the present invention. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
According to a preferred embodiment of the invention, the self-compacting freeze-thaw resistance concrete comprises the following raw materials, by weight, water, cement, nano-silica, waste gas concrete powder, slag steel, water glass, fine aluminum powder, bentonite, gypsum, quicklime, fine river sand, a defoaming agent, a thickening agent and a retarder.
In the most preferable scheme, the raw materials comprise, by weight, 125 parts of water 120-containing materials, 125 parts of cement 120-containing materials, 12 parts of nano-silica, 90-100 parts of waste gas concrete powder, 15 parts of slag steel, 5-10 parts of water glass, 5-10 parts of fine aluminum powder, 5-10 parts of bentonite, 5-10 parts of gypsum, 5-10 parts of quick lime, 20-30 parts of fine river sand, 2-4 parts of a defoaming agent, 1-3 parts of a thickening agent and 1-3 parts of a retarder.
According to the scheme, the defoaming agent is formed by mixing polyacrylamide and alkylphenol ethoxylates according to the ratio of 1:1, and the defoaming agent can be mixed according to actual requirements when specifically selected.
In the scheme of the invention, the thickening agent is one or more of hydroxypropyl methyl cellulose ether, maltodextrin, polyacrylamide, sodium polyacrylate and sodium propenyl sulfonate, and the thickening agent can be mixed according to actual requirements when specifically selected.
In the scheme of the invention, the retarder is one or more of methylcellulose, calcium salt or sodium salt of lignosulphonate, sodium hexametaphosphate, phosphoric acid, disodium phosphate, trisodium phosphate, tetrasodium phosphate, disodium hydrogen phosphate, sodium tripolyphosphate, citric acid and polyvinyl alcohol, and can be mixed according to actual requirements when specifically selected.
In the scheme of the invention, the water reducing rate of the retarder is more than or equal to 15%, the bleeding rate ratio is more than or equal to 100%, and the gas content is less than or equal to 3.5%.
The concrete of the present invention is prepared by the following method.
Example 1:
the preparation method of the self-compacting freeze-thaw resistant concrete comprises the following steps: preparing waste gas concrete powder: selecting waste concrete blocks, adding the waste concrete blocks into a high-temperature furnace, and continuously treating for 30 minutes at 120 ℃; then, putting the waste concrete blocks into a stirrer, continuously introducing high-pressure air into the stirrer, and smashing the waste concrete blocks inside to obtain waste concrete powder;
preparing slag steel: pre-crushing the steel slag refined in the furnace in a mechanical mode, and then baking until the steel slag is completely dried; then separating the large slag steel from the powdered steel slag, firstly carrying out magnetic separation on the large slag steel, and then extracting the slag steel after the steel slag is subjected to multistage crushing, screening and magnetic separation;
putting 50 parts of cement, 10 parts of nano silicon dioxide, 80 parts of waste gas concrete powder, 10 parts of slag steel, 5 parts of water glass, 5 parts of fine aluminum powder, 5 parts of bentonite, 5 parts of gypsum, 5 parts of quicklime, 20 parts of fine river sand, 2 parts of defoaming agent, 1 part of thickening agent and 1 part of retarder into a stirrer, and fully stirring to form a mixture;
pouring 110 parts of the mixture and water into a square mould with an opening, placing the mould on a vibrating disc, setting the vibration frequency of the vibrating disc at 1000 times per minute, controlling the vibration time at 30 seconds, and compacting the interior of the concrete through the vibration of the vibrating disc; pressurizing the inside of the mold for multiple times, wherein the first pressurization is 1.2atm for 10 seconds; the second pressurization is 1.5atm for 10 seconds; third pressurization was 1.8atm for 10 seconds while keeping the vibrating disk vibrating at 1000 oscillations per minute; and (3) vacuumizing the interior of the mold, wherein the time from negative pressure to 0.25atm is 10, and the vibration disc is kept vibrating for 1000-2000 times per minute, so that the mixture forms a concrete prefabricated body in the mold.
Example 2:
the preparation method of the self-compacting freeze-thaw resistant concrete comprises the following steps: preparing waste gas concrete powder: selecting waste concrete blocks, adding the waste concrete blocks into a high-temperature furnace, and continuously treating for 40 minutes at 135 ℃; then, putting the waste concrete blocks into a stirrer, continuously introducing high-pressure air into the stirrer, and smashing the waste concrete blocks inside to obtain waste concrete powder;
preparing slag steel: pre-crushing the steel slag refined in the furnace in a mechanical mode, and then baking until the steel slag is completely dried; then separating the large slag steel from the powdered steel slag, firstly carrying out magnetic separation on the large slag steel, and then extracting the slag steel after the steel slag is subjected to multistage crushing, screening and magnetic separation;
putting 150 parts of cement, 15 parts of nano silicon dioxide, 90 parts of waste gas concrete powder, 15 parts of slag steel, 8 parts of water glass, 8 parts of fine aluminum powder, 8 parts of bentonite, 8 parts of gypsum, 8 parts of quicklime, 25 parts of fine river sand, 3 parts of defoaming agent, 2 parts of thickening agent and 2 parts of retarder into a stirrer, and fully stirring to form a mixture;
pouring 120 parts of the mixture and water into a square mould with an opening, placing the mould on a vibrating disc, setting the vibration frequency of the vibrating disc at 15000 times per minute, controlling the vibration time at 45 seconds, and compacting the interior of the concrete through the vibration of the vibrating disc; pressurizing the inside of the mold for multiple times, wherein the first pressurization is 1.2atm for 12 seconds; the second pressurization is 1.5atm for 12 seconds; third pressurization was 1.8atm for 12 seconds while maintaining the vibratory pan at 1500 oscillations per minute; and (3) vacuumizing the interior of the mould for 12 seconds when the negative pressure is up to 0.25atm, maintaining the vibration disc to vibrate for 1500 times per minute, and forming the concrete prefabricated body in the mould by the mixed material.
Example 3:
the preparation method of the self-compacting freeze-thaw resistant concrete comprises the following steps: preparing waste gas concrete powder: selecting waste concrete blocks, adding the waste concrete blocks into a high-temperature furnace, and continuously treating for 45 minutes at 150 ℃; then, putting the waste concrete blocks into a stirrer, continuously introducing high-pressure air into the stirrer, and smashing the waste concrete blocks inside to obtain waste concrete powder;
preparing slag steel: pre-crushing the steel slag refined in the furnace in a mechanical mode, and then baking until the steel slag is completely dried; then separating the large slag steel from the powdered steel slag, firstly carrying out magnetic separation on the large slag steel, and then extracting the slag steel after the steel slag is subjected to multistage crushing, screening and magnetic separation;
putting 150 parts of cement, 15 parts of nano silicon dioxide, 100 parts of waste gas concrete powder, 20 parts of slag steel, 10 parts of water glass, 10 parts of fine aluminum powder, 10 parts of bentonite, 10 parts of gypsum, 10 parts of quick lime, 30 parts of fine river sand, 4 parts of defoaming agent, 3 parts of thickening agent and 3 parts of retarder into a stirrer, and fully stirring to form a mixture;
pouring the mixture and 150 parts of water into a square mould with an opening, placing the mould on a vibrating disc, setting the vibration frequency of the vibrating disc at 2000 times per minute, controlling the vibration time at 60 seconds, and compacting the interior of the concrete through the vibration of the vibrating disc; pressurizing the inside of the mold for multiple times, wherein the first pressurization is 1.2atm for 15 seconds; the second pressurization is 1.5atm for 15 seconds; third pressurization was 1.8atm for 15 seconds while maintaining the vibratory pan at 2000 vibrations per minute; the inside of the mold was evacuated to a negative pressure of 0.25atm for 15 seconds, and the vibration plate was kept vibrating at 2000 times per minute. The mixture is formed into a concrete preform in a mold.
Example 4:
the preparation method of the self-compacting freeze-thaw resistant concrete comprises the following steps: preparing waste gas concrete powder: selecting waste concrete blocks, adding the waste concrete blocks into a high-temperature furnace, and continuously treating for 30-45 minutes at the temperature of 120-; then, putting the waste concrete blocks into a stirrer, continuously introducing high-pressure air into the stirrer, and smashing the waste concrete blocks inside to obtain waste concrete powder;
preparing slag steel: pre-crushing the steel slag refined in the furnace in a mechanical mode, and then baking until the steel slag is completely dried; then separating the large slag steel from the powdered steel slag, firstly carrying out magnetic separation on the large slag steel, and then extracting the slag steel after the steel slag is subjected to multistage crushing, screening and magnetic separation;
putting 120 parts of cement, 12 parts of nano silicon dioxide, 120-parts of waste gas concrete powder, 15 parts of slag steel, 9 parts of water glass, 9 parts of fine aluminum powder, 9 parts of bentonite, 9 parts of gypsum, 9 parts of quick lime, 25 parts of fine river sand, 3 parts of defoaming agent, 3 parts of thickening agent and 3 parts of retarder into a stirrer, and fully stirring to form a mixture;
pouring 120 parts of the mixture and water into a square mould with an opening, placing the mould on a vibrating disc, setting the vibration frequency of the vibrating disc at 1800 times per minute, controlling the vibration time at 50 seconds, and compacting the interior of the concrete through the vibration of the vibrating disc; pressurizing the inside of the mold for multiple times, wherein the first pressurization is 1.2atm for 12 seconds; the second pressurization is 1.5atm for 12 seconds; a third pressurization of 1.8atm for 12 seconds while maintaining the vibratory pan at 1800 oscillations per minute; the inside of the mold was evacuated to 0.25atm for 12 seconds and the vibrating plate was kept vibrating at 1800 times per minute. The mixture is formed into a concrete preform in a mold.
Performance test 1, room temperature compressive strength, table 1.
| Detecting content | Example 1 | Example 2 | Example 3 | Example 4 |
| Compressive strength/MPa | 54 | 55 | 52 | 57 |
Performance test 2, low temperature compressive strength, according to D50 test standard in "concrete quality control Standard GB 50164-92", Table 2.
| Detecting content | Example 1 | Example 2 | Example 3 | Example 4 |
| Compressive strength/MPa | 44 | 46 | 45 | 46 |
The invention has at least the following advantages:
in the invention, the waste gas concrete powder slag steel belongs to industrial waste, and has low price and rich resources. The waste gas concrete powder, slag steel and cement form new concrete, not only can reduce the cement consumption, reduce the production cost of the concrete, but also mix the waste gas concrete powder slag steel compound into the concrete after, the hydration process can arouse each other and produce compound gel effect, two kinds of mixed materials get the advantages and complementary effect that can the full play waste gas concrete powder slag steel, can the effectual structural strength performance that improves the concrete, can reduce the concrete cement hydration temperature peak, improve the concrete durability, guarantee that the concrete structure after hardening is more closely knit. Simultaneously use earlier vibration, malleation again, the technique that never sees before of negative pressure in the mould in the preparation, the vibration can make concrete itself from the compaction, and malleation and negative pressure homoenergetic simultaneously can further carry out the compaction to it, can further compress tightly the concrete through outside atmospheric pressure for concrete itself is compacter, also can accelerate the time that the concrete is closely knit simultaneously. The bentonite and the gypsum are introduced to ensure that the temples of the concrete have good binding force and have the effect of freeze thawing resistance.
In the process of compaction, in order to prevent large particles in the concrete from being concentrated on the bottom of the concrete in the vibration process, the vibration device is also circularly moved, so that the phenomenon is prevented.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, it should be noted that, for those skilled in the art, many modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (9)
1. The self-compacting freeze-thaw-resistant concrete is characterized by comprising, by weight, 150 parts of water 110-one, 50-150 parts of cement, 10-15 parts of nano silicon dioxide, 80-100 parts of waste gas concrete powder, 10-20 parts of slag steel, 5-10 parts of water glass, 5-10 parts of fine aluminum powder, 5-10 parts of bentonite, 5-10 parts of gypsum, 5-10 parts of quick lime, 20-30 parts of fine river sand, 2-4 parts of a defoaming agent, 1-3 parts of a thickening agent and 1-3 parts of a retarder.
2. The self-compacting freeze-thaw resistant concrete according to claim 1, wherein: the raw materials comprise, by weight, 125 parts of water 120-containing materials, 125 parts of cement 120-containing materials, 12 parts of nano silicon dioxide, 90-100 parts of waste gas concrete powder, 15 parts of slag steel, 5-10 parts of water glass, 5-10 parts of fine aluminum powder, 5-10 parts of bentonite, 5-10 parts of gypsum, 5-10 parts of quick lime, 20-30 parts of fine river sand, 2-4 parts of defoaming agent, 1-3 parts of thickening agent and 1-3 parts of retarder.
3. The self-compacting freeze-thaw resistant concrete according to claim 1, wherein: the defoaming agent is formed by mixing polyacrylamide and alkylphenol polyoxyethylene ether according to the ratio of 1: 1.
4. The self-compacting freeze-thaw resistant concrete according to claim 1, wherein: the thickening agent is one or more of hydroxypropyl methyl cellulose ether, maltodextrin, polyacrylamide, sodium polyacrylate and sodium propenyl sulfonate.
5. The self-compacting freeze-thaw resistant concrete according to claim 1, wherein: the retarder is one or more of methylcellulose, calcium salt or sodium salt of lignosulphonate, sodium hexametaphosphate, phosphoric acid, sodium phosphate tribasic, sodium phosphate tetranitrate, disodium hydrogen phosphate, sodium tripolyphosphate, citric acid, polyvinyl alcohol.
6. The self-compacting freeze-thaw resistant concrete according to claim 5, wherein: the retarder has the water reducing rate of more than or equal to 15 percent, the bleeding rate ratio of more than or equal to 100 percent and the gas content of less than or equal to 3.5 percent.
7. The self-compacting freeze-thaw resistant concrete according to any one of claims 1-5, prepared by a method comprising:
s1, preparing waste gas concrete powder: selecting waste concrete blocks, adding the waste concrete blocks into a high-temperature furnace, and continuously treating for 30-45 minutes at the temperature of 120-; then, putting the waste concrete blocks into a stirrer, continuously introducing high-pressure air into the stirrer, and smashing the waste concrete blocks inside to obtain waste concrete powder;
s2, preparing slag steel: pre-crushing the steel slag refined in the furnace in a mechanical mode, and then baking until the steel slag is completely dried; then separating the large slag steel from the powdered steel slag, firstly carrying out magnetic separation on the large slag steel, and then extracting the slag steel after the steel slag is subjected to multistage crushing, screening and magnetic separation;
s3, putting cement, nano silicon dioxide, waste gas concrete powder, slag steel, water glass, fine aluminum powder, bentonite, gypsum, quick lime, fine river sand, a defoaming agent, a thickening agent and a retarder into a stirrer to be fully stirred to form a mixture;
and S4, pouring the mixture and water into a mold with an open square, compacting the concrete, and forming a concrete prefabricated body in the mold by using the mixture.
8. The self-compacting freeze-thaw resistant concrete according to claim 7, wherein the concrete compaction operation in step S4 is as follows:
s41, placing the mould on a vibration disc, setting the vibration frequency of the vibration disc at 1000-2000 times per minute, controlling the vibration time at 30-60 seconds, and compacting the interior of the concrete through the vibration of the vibration disc;
s42, pressurizing the inside of the die for multiple times, wherein the first pressurization is 1.2atm for 10-15 seconds; the second pressurization is 1.5atm for 10-15 seconds; the third pressurization is 1.8atm for 10-15 seconds, and the vibration disc is kept vibrating at 1000-2000 times per minute;
s43, negative pressure is pumped into the mould, the negative pressure is pumped to 0.25atm for 10-15 seconds, and the vibration disc is kept vibrating at 1000-2000 times per minute.
9. The self-compacting freeze-thaw resistant concrete according to claim 8, wherein the vibration plate is further mounted to a circular motion device so that the vibration plate makes a circular motion at a speed of 10 seconds/turn in steps S41, S42, S43.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112707666A (en) * | 2020-12-30 | 2021-04-27 | 浙江钱塘江水利建筑工程有限公司 | Special additive for hydraulic structure water-permeable pointing mortar and preparation and use methods thereof |
| CN114230304A (en) * | 2021-12-23 | 2022-03-25 | 绵竹市铸诚混凝土有限公司 | Environment-friendly anti-freezing concrete and preparation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101007723A (en) * | 2007-02-09 | 2007-08-01 | 钱卫胜 | Concrete water-permeable brick using steel slag as aggregate |
| CN102617085A (en) * | 2011-01-30 | 2012-08-01 | 中铁八局集团建筑工程有限公司 | Self-compacting concrete for foundation of high speed railway turnout plate |
| CN103951333A (en) * | 2014-04-24 | 2014-07-30 | 宋金博 | Porous concrete prepared from waste road concrete aggregate and preparation process |
| CN105801053A (en) * | 2016-03-16 | 2016-07-27 | 武汉源锦商品混凝土有限公司 | Large-admixing-amount-fly-ash C40 self-compacting concrete |
| CN109467353A (en) * | 2019-01-14 | 2019-03-15 | 河北建业预拌混凝土有限公司 | A kind of frost thawing resistance concrete and preparation method thereof |
-
2020
- 2020-09-14 CN CN202010961499.8A patent/CN112010626A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101007723A (en) * | 2007-02-09 | 2007-08-01 | 钱卫胜 | Concrete water-permeable brick using steel slag as aggregate |
| CN102617085A (en) * | 2011-01-30 | 2012-08-01 | 中铁八局集团建筑工程有限公司 | Self-compacting concrete for foundation of high speed railway turnout plate |
| CN103951333A (en) * | 2014-04-24 | 2014-07-30 | 宋金博 | Porous concrete prepared from waste road concrete aggregate and preparation process |
| CN105801053A (en) * | 2016-03-16 | 2016-07-27 | 武汉源锦商品混凝土有限公司 | Large-admixing-amount-fly-ash C40 self-compacting concrete |
| CN109467353A (en) * | 2019-01-14 | 2019-03-15 | 河北建业预拌混凝土有限公司 | A kind of frost thawing resistance concrete and preparation method thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112707666A (en) * | 2020-12-30 | 2021-04-27 | 浙江钱塘江水利建筑工程有限公司 | Special additive for hydraulic structure water-permeable pointing mortar and preparation and use methods thereof |
| CN112707666B (en) * | 2020-12-30 | 2022-04-29 | 浙江钱塘江水利建筑工程有限公司 | Special additive for hydraulic structure water-permeable pointing mortar and preparation and use methods thereof |
| CN114230304A (en) * | 2021-12-23 | 2022-03-25 | 绵竹市铸诚混凝土有限公司 | Environment-friendly anti-freezing concrete and preparation method thereof |
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