CN114249569B - High-strength concrete and preparation method thereof - Google Patents
High-strength concrete and preparation method thereof Download PDFInfo
- Publication number
- CN114249569B CN114249569B CN202111607829.4A CN202111607829A CN114249569B CN 114249569 B CN114249569 B CN 114249569B CN 202111607829 A CN202111607829 A CN 202111607829A CN 114249569 B CN114249569 B CN 114249569B
- Authority
- CN
- China
- Prior art keywords
- slag
- strength
- particles
- parts
- chopped fiber
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
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
- C04B28/02—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 hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
-
- 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 application relates to the field of concrete materials, and particularly discloses high-strength concrete and a preparation method thereof. The high-strength concrete comprises the following substances in parts by weight: 100 to 120 parts of coarse aggregate, 60 to 80 parts of fine aggregate, 30 to 40 parts of cement, 10 to 20 parts of water and 15 to 40 parts of high-strength modified material; the high-strength modified material comprises a chopped fiber particle composite slag material, wherein the mass ratio of chopped fiber particles to slag in the chopped fiber particle composite slag material is 1. The preparation method comprises the following steps: s1, premixing, S2, and blending. The formula of high-strength concrete is optimized, the chopped fibers and the slag materials are selected for compounding to serve as mineral admixture, the pores of the slag materials are compacted and filled, the defect that the slag materials are singly doped to be poor in strength inside the high-strength concrete is overcome, and the mechanical property and the mechanical strength of the high-strength concrete are improved.
Description
Technical Field
The application relates to the field of concrete materials, in particular to high-strength concrete and a preparation method thereof.
Background
According to the current concrete material strength development situation, the concrete with the strength grade of C60 and above at home and abroad is called high-strength concrete. The high-strength concrete has the characteristics of high compressive strength, strong deformation resistance, high density, low porosity and the like. The high-strength concrete has the following advantages in the aspect of construction engineering: the compression strength is high, the deformation resistance is strong, the size of the section of the component can be reduced, and the self weight of the structure is reduced; the deformation is small, and the rigidity is high; the compactness is good, the impermeability and the freezing resistance are good, the seawater erosion and scouring resistance is strong, and the engineering service life is prolonged; the prestressing technique provides advantages; the concrete consumption is saved, and the technical and economic benefits are remarkable.
The high-strength concrete is made up by using ordinary cement and sand stone as raw materials and adopting conventional production process, and adding high-effective additive or simultaneously adding a certain quantity of active mineral additive so as to make the fresh concrete obtain the cement concrete with excellent workability and high strength and high durability after it is hardened. The concept shows that the factors such as the types, the properties, the use amount and the like of the raw materials directly relate to the quality, the cost and the performance of the concrete, so that the optimization of the mix proportion design of the high-strength and high-performance concrete is carried out, and the main task of the mix proportion design at present is that the concrete has higher strength, better workability, stronger durability and lower manufacturing cost.
In view of the above related technologies, the inventor believes that, in the existing high-strength concrete material, because of the type of the adopted raw materials, the slag and the fly ash materials as mineral admixtures have unstable performance, and a single doping may cause the defects that the strength stability of the high-strength concrete material is not good and the strength does not meet the actual requirements.
Disclosure of Invention
In order to overcome the defect that the strength of the existing high-strength concrete is poor due to the fact that the existing high-strength concrete is simply doped with mineral admixtures, the application provides the high-strength concrete and the preparation method thereof.
In a first aspect, the present application provides a high-strength concrete, which adopts the following technical scheme:
the high-strength concrete comprises the following substances in parts by weight: 100 to 120 parts of coarse aggregate, 60 to 80 parts of fine aggregate, 30 to 40 parts of cement, 10 to 20 parts of water and 15 to 40 parts of high-strength modified material; the high-strength modified material comprises a chopped fiber particle composite slag material, wherein the mass ratio of chopped fiber particles to slag in the chopped fiber particle composite slag material is 1.
By adopting the technical scheme, the formula of the high-strength concrete is optimized, on one hand, the technical scheme selects the conventional coarse and fine aggregate for compounding to assist the cement material, so that the preparation cost of the high-strength concrete material can be effectively reduced; on the other hand, this application carries out the complex as mineral admixture through chooseing for use chopped strand and slag material, because the chopped strand granule can be as modified material, effectively dopes and fills to slag material inside to closely knit and fill slag material's hole, improve the defect that slag material is single to be doped to the inside back intensity of high-strength concrete is not good. By effectively filling the chopped fiber particles, the entanglement stress between fibers is further strengthened, and the anchoring strength between slag particles and cement aggregate is improved, so that the mechanical property and the mechanical strength of the high-strength concrete material are improved from a micro aspect to a macro aspect.
Preferably, the chopped fiber particles comprise fly ash chopped fiber particles, and the fly ash chopped fiber particles are prepared by adopting the following scheme:
mixing and crushing dolomite and fly ash according to the mass ratio of 1;
heating by program, melting at a constant temperature, and drawing the molten composite material at 1400-1450 ℃ to form composite fibers;
standing and cooling to room temperature, performing short-cut treatment on the composite fiber, and collecting the fly ash short-cut fiber particles with the diameter of 10-15 mu m and the length of 0.2-0.5 mm.
By adopting the technical scheme, the short-cut fiber is prepared by mixing dolomite and fly ash, and because the traditional fly ash fiber is a polymer containing silicate, the content of calcium oxide and magnesium oxide in the structure is not high, and the structural strength is not good, so the application forms a good entanglement structure after the dolomite and the fly ash are melted, and further improves the defect of poor structural strength of the traditional fly ash material, improves the structural strength of the short-cut fiber particle composite slag material, and improves the mechanical property and the mechanical strength of a high-strength concrete material.
Preferably, the high-strength modified material also comprises fly ash particles, and the mass of the fly ash particles is 15-20% of that of the slag.
According to the application, by further optimizing the formula and the composition of the high-strength modified material, the fly ash material and the slag material are hydrated in the cement to form the gelled material, so that the structural strength and the mechanical property of the concrete material can be further improved, and meanwhile, the fly ash chopped fiber particles in the high-strength modified material are used as a framework material, so that the mechanical property of the concrete material is further improved.
Preferably, the slag includes at least one of blast furnace slag or steel slag.
By adopting the technical scheme, the slag type is further optimized, because the blast furnace slag is se:Sub>A byproduct formed at 1350-1550 ℃ in the steelmaking process and is used as se:Sub>A C-A-S system, has latent hydraulicity and can react with se:Sub>A strong alkaline solution, and the steel slag is formed by oxidizing various oxides formed by oxidizing impurities in pig iron such as silicon, manganese, phosphorus, sulfur and the like in the smelting process and salts generated by reacting the oxides with se:Sub>A solvent, the structural strength of the concrete material can be further improved, so that the strength of se:Sub>A composite structure of the cementing material is improved, and the mechanical property and the mechanical strength of the high-strength concrete material are further improved by optimizing the components of the slag.
Preferably, the high-strength modified material is prepared by adopting the following scheme:
firstly, performing permeability modification treatment on the fly ash chopped fiber particles, and collecting modified chopped fiber particles;
taking slag, activating, grinding and sieving, and collecting slag particles;
and taking the slag particles, the modified chopped fiber particles and the silica sol, stirring, mixing, pressurizing, collecting to obtain mixed slurry, filtering, and drying to obtain the high-strength modified material.
Through adopting above-mentioned technical scheme, this application is through handling fly ash chopped strand particles earlier, improve its permeability, as the carrier through the silica sol, effective infiltration and fill to inside the slay granule after the activation treatment, because fly ash chopped strand particles not only has good entanglement structure effect, also has the performance in stable closely knit hole, under the condition that the silica sol is as the carrier, the pore structure of stable dispersion and effective closely knit slay granule, thereby further improve the structural strength of mineral admixture material, the mechanical properties and the mechanical strength of high-strength concrete material have been improved.
Preferably, the permeability modification treatment is carried out by adopting a permeability treatment fluid, and the permeability treatment fluid comprises the following substances in parts by weight:
25-30 parts of sodium dodecyl aminopropionate;
15-30 parts of ammonium dodecyl sulfate;
3-6 parts of myristoyl sodium glutamate.
By adopting the technical scheme, according to the technical scheme, the fly ash chopped fiber particles can be modified by compounding the cationic surfactant, the zwitterionic surfactant and the amino acid surfactant, the composite surfactant material is adsorbed on the surfaces of the fly ash chopped fiber particles, the surface electrical property of the fly ash chopped fiber particles is changed, a large number of fatty chain hydrophobic groups are introduced, a layer of hydrophobic oil film is formed on the surfaces of the fly ash chopped fiber particles, the friction coefficient among the fly ash chopped fiber particles is reduced, the fly ash chopped fiber particles can better permeate into the pores of the fly ash, and the permeation effect of the fly ash chopped fiber particles is improved.
Preferably, the activation treatment comprises the following treatment steps:
physical activation: putting the slag particles into a grinding device for powder treatment and sieving, and collecting the mechanically activated slag particles;
chemical activation: and (3) placing the mechanically activated slag particles into a chitosan acetic acid solution with the mass fraction of 10%, stirring, mixing, standing, activating, washing and drying to finish the activation treatment step.
By adopting the technical scheme, the scheme of activating treatment on the slag is optimized, the physical and chemical activation methods are adopted, the particle size of the slag is changed through physical mechanical activation, the specific surface area of the slag is increased, the mineral structure of the slag is destroyed, the internal structure of the slag is changed from irregular to multiphase crystal form, a large number of active particles are formed, and the tailing is activated.
After physical activation, the blast furnace slag and the chitosan are compounded through chemical activation, and then the very fine particles of the blast furnace slag are adhered to each other, so that the structure increases the specific surface area of adsorption to a certain extent, thereby further improving the structural performance of the high-strength modified material and improving the mechanical strength of the high-strength concrete material.
In a second aspect, the present application provides a method for preparing high-strength concrete, which adopts the following technical scheme:
a preparation method of high-strength concrete comprises the following steps:
s1, premixing: taking the coarse aggregate and the fine aggregate, putting the coarse aggregate and the fine aggregate into a stirring device, adding the cement into the stirring device, stirring and premixing, and collecting to obtain a premix;
s2, blending treatment: and mixing the high-strength modified material with water, adding the mixture into the premix, stirring, compounding and blending to obtain the high-strength concrete.
By adopting the technical scheme, part of materials are uniformly mixed firstly through premixing treatment, and finally the mineral powder materials are blended together, so that the problem of structural damage among the materials caused by friction of all the components due to mixing together in the traditional preparation scheme is solved, and the mechanical property and the structural strength of the high-strength concrete material are further improved.
In summary, the present application has the following beneficial effects:
firstly, the formula of the high-strength concrete is optimized, on one hand, the technical scheme of the application selects conventional coarse and fine aggregate for compounding to assist a cement material, so that the preparation cost of the high-strength concrete material can be effectively reduced; on the other hand, this application carries out compound as mineral admixture through chooseing for use chopped fiber and slay material, because the chopped fiber granule can be as modified material, effectively adulterate and fill to inside the slay material to closely knit and fill the hole of slay material, improve the defect that the inside back intensity of slay material is not good of slag material single adulteration to high-strength concrete. By effectively filling the chopped fiber particles, the entanglement stress between the fibers is further strengthened, and the anchoring strength between slag particles and cement aggregate is improved, so that the mechanical property and the mechanical strength of the high-strength concrete material are improved from the micro aspect to the macro aspect.
Second, this application is through handling fly ash chopped strand particles earlier, improve its permeability, as the carrier through the silica sol, effectively permeate and fill to inside the slay granule after the activation treatment, because fly ash chopped strand particles not only has good entanglement structure effect, also has the performance in stable closely knit hole, under the condition that the silica sol is as the carrier, stable dispersion and the pore structure of effectively closely knit slay granule, thereby further improve the structural strength of mineral admixture material, improved the mechanical properties and the mechanical strength of high-strength concrete material.
And thirdly, the scheme of activating treatment of the slag is optimized, the physical and chemical activation methods are adopted, the particle size of the slag is changed through physical mechanical activation, the specific surface area of the slag is increased, the mineral structure of the slag is damaged, the internal structure of the slag is changed from irregular to multiphase crystal form, a large number of active particles are formed, and the tailing is activated.
After physical activation, chemical activation is carried out, and after the blast furnace slag and the chitosan are compounded, the very fine particles of the blast furnace slag are adhered to each other, and the structure increases the specific surface area of adsorption to a certain extent, so that the structural performance of the high-strength modified material is further improved, and the mechanical strength of the high-strength concrete material is improved.
Fourthly, according to the technical scheme, the fly ash chopped fiber particles can be modified through compounding of the cationic surfactant, the zwitterionic surfactant and the amino acid type surfactant, the composite surfactant material is adsorbed on the surfaces of the fly ash chopped fiber particles, the surface electrical property of the fly ash chopped fiber particles is changed, a large number of fatty chain hydrophobic groups are introduced, a layer of hydrophobic oil film is formed on the surfaces of the fly ash chopped fiber particles, the friction coefficient among the fly ash chopped fiber particles is reduced, the fly ash chopped fiber particles can better penetrate into the pores of the fly ash, and therefore the penetrating effect of the fly ash chopped fiber particles is improved.
Detailed Description
The present application will be described in further detail with reference to examples.
In the embodiments of the present application, the selected materials are as follows, but not limited to:
medicine preparation:
coarse aggregate: crushed stone with the grain diameter of 5-10 mm;
fine aggregate: fineness modulus of 2.37 and apparent density of 2687kg/m 3 Having a bulk density of 1642kg/m 3 The pebbles of (a);
cement: p.o 42.5R portland cement;
blast furnace slag: the Lingshou county is a forever smooth mineral processing plant, 100-200 meshes of blast furnace slag;
steel slag: the order number is GZ-9, produced by Lingshu county Chuan Qing mineral products, inc.;
fly ash: second grade fly ash produced by Hebei hollow building materials science and technology company.
Preparation examples
Preparation of coal ash chopped fiber particles
Preparation example 1
A fly ash chopped fiber particle 1:
mixing 1kg of dolomite with 6kg of fly ash, crushing, grinding and dispersing, screening by a 1000-mesh screen, collecting mixed powder and placing in a heating furnace; heating to 1600 ℃ according to a temperature rise rate of 250 ℃/h, preserving heat and melting, and drawing the molten composite material at 1400 ℃ to form composite fibers; standing and cooling to room temperature, performing short-cut treatment on the composite fiber, and collecting the fly ash short-cut fiber particles with the diameter of 10-15 mu m and the length of 0.2-0.5 mm.
Preparation example 2
A fly ash chopped fiber particle 2:
mixing 1kg of dolomite with 7kg of fly ash, crushing, grinding and dispersing, screening by a 1000-mesh screen, collecting mixed powder and placing in a heating furnace; heating to 1600 ℃ according to the temperature rise rate of 250 ℃/h, preserving heat, melting, and drawing the molten composite material at 1425 ℃ to form composite fibers; standing and cooling to room temperature, performing short-cut treatment on the composite fiber, and collecting the fly ash short-cut fiber particles with the diameter of 10-15 mu m and the length of 0.2-0.5 mm.
Preparation example 3
A fly ash chopped fiber particle 3:
mixing 1kg of dolomite with 8kg of fly ash, crushing, grinding and dispersing, screening by a 1000-mesh screen, collecting mixed powder and placing in a heating furnace; heating to 1600 ℃ according to a temperature rise rate of 250 ℃/h, preserving heat, melting, and drawing the molten composite material at 1450 ℃ to form composite fibers; standing and cooling to room temperature, carrying out short-cut treatment on the composite fiber, and collecting the fly ash short-cut fiber particles with the diameter of 10-15 mu m and the length of 0.2-0.5 mm.
Preparation example 4
An osmotic treatment fluid 1:
25kg of sodium dodecylaminopropionate, 15kg of ammonium lauryl sulfate and 3kg of sodium myristoyl glutamate were mixed to prepare a permeate 1.
Preparation example 5
An osmotic treatment fluid 2:
27.5kg of sodium dodecylaminopropionate, 22.5kg of ammonium lauryl sulfate and 4.5kg of sodium myristoyl glutamate were mixed to prepare a permeate 2.
Preparation example 6
An osmotic treatment fluid 3:
30kg of sodium dodecylaminopropionate, 30kg of ammonium lauryl sulfate and 6kg of sodium myristoyl glutamate were mixed to prepare a permeate 3.
Preparation example 7
A high-strength modified material 1:
firstly, taking 2kg of fly ash chopped fiber particles 1 and 10kg of osmotic treatment liquid 1, stirring, mixing, standing for 60min, filtering, vacuum-drying, and collecting to obtain modified chopped fiber particles;
then 5kg of steel slag is taken and put into a grinding device for powder treatment and is sieved by a 200-mesh sieve, and the mechanically activated steel slag particles are collected; putting 3kg of mechanically activated slag particles into 10kg of chitosan acetic acid solution with the mass fraction of 10%, stirring, mixing, standing, activating for 2 hours, washing with deionized water, drying in vacuum, grinding, sieving with a 500-mesh sieve, and collecting to obtain slag particles;
taking 3kg of slag particles, 1kg of modified chopped fiber particles and 5kg of silica sol with the solid content of 15%, stirring, mixing, pressurizing under 2MPa, collecting mixed slurry, filtering, collecting filter residues, and drying to obtain the high-strength modified material 1.
Preparation example 8
A high-strength modified material 2:
firstly, taking 2kg of fly ash chopped fiber particles 1 and 10kg of permeation treatment liquid 1, stirring, mixing, standing for 60min, filtering, vacuum-drying, and collecting to obtain modified chopped fiber particles;
then taking 5kg of steel slag, putting the steel slag into a grinding device for powder treatment, sieving the steel slag by a 200-mesh sieve, and collecting to obtain mechanically activated steel slag particles; taking 3kg of mechanically activated slag particles, putting the mechanically activated slag particles into 10kg of chitosan acetic acid solution with the mass fraction of 10%, stirring, mixing, standing and activating for 2 hours, washing with deionized water, drying in vacuum, grinding, sieving with a 500-mesh sieve, and collecting the slag particles;
taking 4kg of slag particles, 1kg of modified chopped fiber particles and 6kg of silica sol with the solid content of 15%, stirring, mixing, pressurizing under 2MPa, collecting mixed slurry, filtering, collecting filter residues, and drying to obtain the high-strength modified material 2.
Preparation example 9
A high-strength modified material 3:
firstly, taking 2kg of fly ash chopped fiber particles 1 and 10kg of osmotic treatment liquid 1, stirring, mixing, standing for 60min, filtering, vacuum-drying, and collecting to obtain modified chopped fiber particles;
then taking 5kg of steel slag, putting the steel slag into a grinding device for powder treatment, sieving the steel slag by a 200-mesh sieve, and collecting to obtain mechanically activated steel slag particles; putting 3kg of mechanically activated slag particles into 10kg of chitosan acetic acid solution with the mass fraction of 10%, stirring, mixing, standing, activating for 2 hours, washing with deionized water, drying in vacuum, grinding, sieving with a 500-mesh sieve, and collecting to obtain slag particles;
5kg of slag particles, 1kg of modified chopped fiber particles and 7kg of silica sol with the solid content of 15 percent are taken, stirred, mixed and pressurized under 2MPa, mixed slurry is collected, filter residue is collected after filtration and is dried, and the high-strength modified material 3 can be prepared.
Preparation example 10
A high-strength modified material 4: compared with preparation example 7, fly ash chopped fiber particles 2 are adopted in the high-strength modified material in preparation example 10 to replace fly ash chopped fiber particles 1 in preparation example 7.
Preparation example 11
A high-strength modified material 5: compared with preparation example 7, fly ash chopped fiber particles 3 are adopted in the high-strength modified material in preparation example 11 to replace fly ash chopped fiber particles 1 in preparation example 7.
Preparation example 12
A high-strength modified material 6: in comparison with preparation example 7, the high-strength modified material in preparation example 12 used the penetrant processing liquid 2 instead of the penetrant processing liquid 1 in preparation example 7.
Preparation example 13
A high-strength modified material 7: in comparison with preparation example 7, the high-strength modified material in preparation example 13 used permeation treatment liquid 3 in place of permeation treatment liquid 1 in preparation example 7.
Preparation example 14
A high-strength modified material 8: in comparison with preparation example 7, in preparation example 14, blast furnace slag was used instead of the steel slag of preparation example 7.
Preparation example 15
A high-strength modified material 9: in addition, 0.75kg of fly ash particles was added to the mixture in preparation example 15, as compared with preparation example 7.
Preparation example 16
A high-strength modified material 10: in preparation example 16, 0.85kg of fly ash particles was further added as compared with preparation example 7.
Preparation example 17
A high-strength modified material 11: in preparation example 17, 1kg of fly ash particles were further added as compared with preparation example 7.
Examples
Example 1
A high strength concrete comprising the following: 100kg of coarse aggregate, 60kg of fine aggregate, 30kg of cement, 10kg of water and 15kg of high-strength modified material 1;
a preparation method of high-strength concrete comprises the following steps:
s1, premixing: taking the coarse aggregate and the fine aggregate, putting the coarse aggregate and the fine aggregate into a stirring device, adding the cement into the stirring device, stirring and premixing, and collecting to obtain a premix;
s2, blending treatment: and (3) mixing the high-strength modified material 1 with water, adding the mixture into the premix, stirring, compounding and blending to obtain the high-strength concrete.
Example 2
A high strength concrete comprising the following: 110kg of coarse aggregate, 70kg of fine aggregate, 35kg of cement, 15kg of water and 27kg of high-strength modified material 1;
a preparation method of high-strength concrete comprises the following steps:
s1, premixing: taking coarse aggregate and fine aggregate, putting the coarse aggregate and the fine aggregate into a stirring device, adding cement into the stirring device, stirring and premixing, and collecting to obtain a premix;
s2, blending treatment: and (3) mixing the high-strength modified material 1 with water, adding the mixture into the premix, stirring, compounding and blending to obtain the high-strength concrete.
Example 3
A high strength concrete comprising the following: 120kg of coarse aggregate, 80kg of fine aggregate, 40kg of cement, 20kg of water and 40kg of high-strength modified material 1;
a preparation method of high-strength concrete comprises the following steps:
s1, premixing: taking coarse aggregate and fine aggregate, putting the coarse aggregate and the fine aggregate into a stirring device, adding cement into the stirring device, stirring and premixing, and collecting to obtain a premix;
s2, blending treatment: and (3) mixing the high-strength modified material 1 with water, adding the mixture into the premix, stirring, compounding and blending to obtain the high-strength concrete.
Examples 4 to 13
A high-strength concrete is different from the concrete in example 1 in that high-strength modified materials in examples 4 to 8 are shown in the following Table 1, and the rest of the preparation steps and the preparation conditions are the same as those in example 1.
TABLE 1 table of high-strength modified material components in high-strength concrete
Comparative example
Comparative example 1
A high-strength concrete is different from example 1 in that 15kg of fly ash is used in comparative example 1 instead of the high-strength modified material 1 in example 1.
Comparative example 2
A high-strength concrete, which is different from example 1 in that 15kg of steel slag was used in comparative example 2 instead of the high-strength modified material 1 of example 1.
Comparative example 3
A high-strength concrete was distinguished from example 1 in that 15kg of blast furnace slag was used in comparative example 3 instead of the high-strength modified material 1 of example 1.
Comparative example 4
A high-strength concrete was distinguished from example 1 in that a mixed material of 7.5kg of slag and 7.5kg of fly ash was used in comparative example 4 in place of the high-strength modified material 1 in example 1.
Performance test
The high-strength concrete materials prepared in the examples 1 to 13 and the comparative examples 1 to 4 are poured into concrete blocks of 100mm × 100mm × 100mm, the compressive strength is measured when the concrete blocks are cured for 7 days, 28 days and 90 days respectively, the concrete standard refers to a common concrete mechanical property test method GB/T50081-2002, and the detection effect is shown in the following table 2;
TABLE 2 tables for examining the performances of examples 1 to 13 and comparative examples 1 to 4
By combining the performance test tables of examples 1 to 13, comparative examples 1 to 4 and Table 2, comparison can be found out that:
examples 1-3, examples 4-10, examples 11-13 and comparative examples 1-4 are now divided into four groups for comparison, specifically as follows:
(1) Firstly, comparing the performances of the embodiments 1 to 3 with the performances of the comparative examples 1 to 4, and as can be seen from the data in table 2, the data of the embodiments 1 to 3 are obviously superior to the data of the comparative examples 1 to 4, which indicates that the technical scheme of the application adopts the high-strength modified material, and the chopped fiber and the slag material are compounded to be used as the mineral admixture, and the chopped fiber particles can be used as the modified material and are effectively doped and filled into the slag material, so that the pores of the slag material are densified and filled, and the defect that the strength of the slag material is poor after being singly doped into the high-strength concrete is overcome. By effectively filling the chopped fiber particles, the entanglement stress between fibers is further strengthened, and the anchoring strength between slag particles and cement aggregate is improved, so that the mechanical property and the mechanical strength of the high-strength concrete material are improved from a micro aspect to a macro aspect.
(2) Further comparing examples 4-10 with comparative examples 1-4, the data of examples 4-10 are significantly higher than the data of example 1, and since examples 4-10 improve the preparation method of the high-strength modified material, it is described that in the technical scheme of the present application, fly ash chopped fiber particles are treated first to improve the permeability thereof, and silica sol is used as a carrier to effectively permeate and fill the inside of activated slag particles, and since fly ash chopped fiber particles not only have a good entanglement structure effect, but also have stable dense pore properties, and under the condition that silica sol is used as a carrier, the fly ash chopped fiber particles stably disperse and effectively compact the pore structure of the slag particles, thereby further improving the structural strength of the mineral admixture material and improving the mechanical properties and mechanical strength of the high-strength concrete material.
And comparing with the comparative example 4 by further combining the examples 4-10, which shows that the technical scheme optimizes the scheme of the activation treatment of the slag, changes the particle size of the slag and increases the specific surface area of the slag through two different physical and chemical schemes of activation methods, and after the blast furnace slag and the chitosan are compounded through physical mechanical activation and chemical activation, the tiny particles of the blast furnace slag are adhered to each other, so that the structure increases the specific surface area of adsorption to a certain extent, thereby further improving the structural performance of the high-strength modified material and improving the mechanical strength of the high-strength concrete material.
(3) Comparing examples 11 to 13 with example 1, the data of examples 11 to 13 are significantly higher than the data of example 1, and since the fly ash particles are further added to the high-strength modified material in the high-strength concrete in examples 11 to 13, it is demonstrated that the formulation and composition of the high-strength modified material are further optimized, and since the fly ash material and the slag material are hydrated in the cement to form a gelled material, the structural strength and mechanical properties of the concrete material can be further improved, and meanwhile, the fly ash chopped fiber particles in the high-strength modified material are used as a framework material, so as to further improve the mechanical properties of the concrete material.
The specific embodiments are only for explaining the present application and are not limiting to the present application, and those skilled in the art can make modifications to the embodiments without inventive contribution as required after reading the present specification, but all the embodiments are protected by patent law within the scope of the claims of the present application.
Claims (5)
1. The high-strength concrete is characterized by comprising the following substances in parts by weight:
100-120 parts of coarse aggregate;
60-80 parts of fine aggregate;
30-40 parts of cement;
10-20 parts of water;
15-40 parts of high-strength modified material;
the high-strength modified material comprises a chopped fiber particle composite slag material, wherein in the chopped fiber particle composite slag material, the mass ratio of chopped fiber particles to slag is 1-5, the chopped fiber particles comprise pulverized fuel ash chopped fiber particles, and the high-strength modified material is prepared by adopting the following scheme:
firstly, performing permeability modification treatment on the fly ash chopped fiber particles, and collecting the modified chopped fiber particles;
taking slag, activating, grinding and sieving, and collecting slag particles;
taking slag particles, modified chopped fiber particles and silica sol, stirring, mixing and pressurizing, collecting to obtain mixed slurry, filtering and drying to obtain the high-strength modified material;
the permeability modification treatment is carried out by adopting a permeability treatment fluid, and the permeability treatment fluid comprises the following substances in parts by weight:
25-30 parts of sodium dodecyl aminopropionate;
15-30 parts of ammonium dodecyl sulfate;
3-6 parts of myristoyl sodium glutamate;
the activation treatment comprises the following treatment steps:
physical activation: putting the slag particles into a grinding device for powder treatment and sieving, and collecting to obtain mechanically activated slag particles;
chemical activation: and (3) placing the mechanically activated slag particles into a chitosan acetic acid solution with the mass fraction of 10%, stirring, mixing, standing, activating, washing and drying to finish the activation treatment step.
2. The high-strength concrete as claimed in claim 1, wherein said fly ash chopped fiber particles are made by the following scheme:
mixing and crushing dolomite and fly ash according to the mass ratio of 1;
heating the mixture by a program, melting the mixture in a heat preservation way, and drawing the melted composite material at 1400-1450 ℃ to form composite fiber;
standing and cooling to room temperature, performing short-cut treatment on the composite fiber, and collecting the fly ash short-cut fiber particles with the diameter of 10-15 mu m and the length of 0.2-0.5 mm.
3. The high-strength concrete according to claim 1, characterized in that the high-strength modified material further comprises fly ash particles, and the mass of the fly ash particles is 15-20% of the mass of the slag.
4. A high strength concrete according to claim 1, wherein the slag comprises at least one of blast furnace slag or steel slag.
5. A method for preparing a high strength concrete according to any one of claims 1 to 4, characterized by the following preparation steps:
s1, premixing: taking coarse aggregate and fine aggregate, putting the coarse aggregate and the fine aggregate into a stirring device, adding cement into the stirring device, stirring and premixing, and collecting to obtain a premix;
s2, blending treatment: and (3) mixing the high-strength modified material with water, adding the mixture into the premix, stirring and compounding, and performing blending treatment to obtain the high-strength concrete.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111607829.4A CN114249569B (en) | 2021-12-27 | 2021-12-27 | High-strength concrete and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111607829.4A CN114249569B (en) | 2021-12-27 | 2021-12-27 | High-strength concrete and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114249569A CN114249569A (en) | 2022-03-29 |
| CN114249569B true CN114249569B (en) | 2022-10-18 |
Family
ID=80797830
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111607829.4A Active CN114249569B (en) | 2021-12-27 | 2021-12-27 | High-strength concrete and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114249569B (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06340461A (en) * | 1992-10-23 | 1994-12-13 | Sansou:Kk | Fiber reinforced cement composite material |
| CN107032717B (en) * | 2016-11-17 | 2019-03-05 | 盐城工学院 | Nickel slag-slag based cementitious material, preparation method and application |
| CN109824300B (en) * | 2019-03-01 | 2021-04-09 | 中兴文物建筑装饰工程有限公司 | Glutinous rice mortar and preparation method thereof |
| CN111777385A (en) * | 2020-07-21 | 2020-10-16 | 山东水利建设集团有限公司 | Inclined plane self-compacting concrete and pouring construction method thereof |
| CN112679162B (en) * | 2020-12-29 | 2022-01-11 | 江南大学 | Low-shrinkage ultrahigh-strength self-compacting concrete and preparation method thereof |
-
2021
- 2021-12-27 CN CN202111607829.4A patent/CN114249569B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN114249569A (en) | 2022-03-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113735520B (en) | Anti-cracking recycled concrete and preparation method thereof | |
| CN111620624B (en) | Self-compacting concrete and preparation method thereof | |
| CN113354342A (en) | Regenerated micropowder concrete and preparation method thereof | |
| CN112723806A (en) | Light heat-preservation high-strength concrete and preparation method thereof | |
| CN110078431A (en) | Anti- isolation high-strength heat-insulating concrete of one kind and preparation method thereof | |
| CN111393105A (en) | Full-machine-made sand high-strength super-high-rise pumping concrete and production method and application thereof | |
| CN110818360A (en) | Expanded perlite foam light soil and preparation method thereof | |
| CN105541217A (en) | Impermeable concrete prepared from steel slags | |
| CN109293292B (en) | Concrete and preparation process thereof | |
| CN113149556B (en) | Anti-crack concrete for super-long structure and preparation method thereof | |
| CN114180898A (en) | Regenerated pervious concrete and preparation method thereof | |
| CN114573291A (en) | Limestone powder high-strength concrete and preparation method thereof | |
| CN112777980B (en) | Preparation method of waste glass fire-resistant high-strength concrete | |
| CN113716920A (en) | Foam concrete wall material with industrial waste replacing cement in large proportion | |
| CN113149553A (en) | Light heat-preservation high-strength concrete and preparation method thereof | |
| CN115321924B (en) | Durable self-compaction filling concrete material for underground structural engineering | |
| CN114249569B (en) | High-strength concrete and preparation method thereof | |
| CN114790099B (en) | Dry-mixed mortar and preparation method thereof | |
| CN114292081A (en) | Cement-free low-carbon concrete and preparation method thereof | |
| CN107098644B (en) | A kind of concrete of impact resistance | |
| CN109574598A (en) | A kind of preparation process of environment-friendlydurable durable construction material | |
| CN109574599A (en) | A kind of environment-friendlydurable durable construction material | |
| CN115772017B (en) | Flexible impermeable curtain and preparation method thereof | |
| CN113603414B (en) | Green dry-mixed guniting slope-fixing material and preparation method and use method thereof | |
| CN117125931A (en) | Low-viscosity high-strength concrete and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |