CN110981356A - Concrete taking industrial waste residues as admixture and preparation method thereof - Google Patents
Concrete taking industrial waste residues as admixture and preparation method thereof Download PDFInfo
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- CN110981356A CN110981356A CN201911341372.XA CN201911341372A CN110981356A CN 110981356 A CN110981356 A CN 110981356A CN 201911341372 A CN201911341372 A CN 201911341372A CN 110981356 A CN110981356 A CN 110981356A
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- 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
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- 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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
- C04B20/023—Chemical treatment
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- 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
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- 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
- C04B2111/00017—Aspects relating to the protection of the environment
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- 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
Abstract
The invention discloses concrete taking industrial waste residues as admixture and a preparation method thereof. The concrete taking the industrial waste residues as the admixture comprises the following raw materials in parts by weight: 285 parts of cement, 360 parts of river sand, 940 parts of stone, 200 parts of water, 45-55 parts of fly ash, 45-70 parts of slag powder, 380 parts of artificial sand, 8-10 parts of additive and 100 parts of modified phosphorus slag powder; the modified phosphorus slag powder comprises the following components: phosphorus slag, grinding aid, stearic acid, water reducing agent, water glass, aluminum potassium sulfate, sodium sulfate, polyacrylamide, carboxymethyl cellulose, coal gangue and gypsum. The concrete using the industrial waste residues as the admixture has the advantages of short setting time, high early strength, capability of adsorbing and degrading nitric oxides in automobile exhaust, utilization of industrial solid wastes, contribution to environmental protection and waste recycling.
Description
Technical Field
The invention relates to the technical field of building materials, in particular to concrete taking industrial waste residues as admixture and a preparation method thereof.
Background
The industrial waste residue refers to solid waste generated in the industrial production process, such as slag, fly ash, steel slag, liquid slag and phosphorous slagAnd copper slag and the like, wherein the raw materials are called 'misplaced raw materials', if the industrial waste slag is not utilized, a large amount of industrial waste slag is stockpiled, not only land resources are occupied, but also serious air pollution, soil pollution and water resource pollution are caused, and the natural environment and human health are harmed, and on the other hand, the industrial waste slag mostly has a utilizable value and is a recyclable resource, the fly ash and the slag are active admixtures which are widely applied at present, and other industrial waste slag belongs to a cementing material with potential activity, for example, the chemical components of the steel slag are similar to those of cement clinker, but contain a large amount of unstable free CaO, MgO and Fe2O3And the clinker is theoretically low-activity inferior clinker, and the activity can be stimulated by adopting a proper activation mode.
In the prior art, a chinese patent application No. 201811276536.0 discloses a high-strength crack-resistant concrete, which comprises the following raw materials in parts by weight: 300 parts of Portland cement, 25-50 parts of zeolite powder, 20-30 parts of phosphorous slag powder, 1000 parts of sand, 20-25 parts of rubber powder, 1000 parts of stone, 3-4.5 parts of steel fiber, 1.5-2.5 parts of carbon fiber, 0.5-1 part of polypropylene fiber, 0.8-1.2 parts of polyvinyl alcohol fiber, 5-6.5 parts of water reducing agent, 0.1-0.15 part of air entraining agent, 3.5-5 parts of desulfurized gypsum and 125 parts of water 105.
The phosphorus slag powder is doped into the existing high-strength anti-cracking concrete, although the concrete has good workability, strength and anti-cracking performance, because the phosphorus slag is used as an admixture for the concrete and needs to be ground to a certain particle size, in the grinding process, the phosphorus slag particles become small, chemical bonds in the phosphorus slag glass body can be broken, F and P are exposed on the surfaces of the phosphorus slag particles, and F atoms are unstable, so that F is easily formed in the presence of positive charges-，F-With Ca in cement hydration products2+CaF is formed on the surface of the phosphorous slag particles under the action of ions2，CaF2And with H in cement hydration products+The ions form hydrogen bonds, so that phosphorus slag particles are adsorbed to the surface of the hydration product film, the compactness of the film is increased, the hydration speed is reduced, and the condensation time is finally delayed; also, since the exposed P atom is also extremely unstable, it is extremely easy to react withSurrounding Ca2+The ions act to form a structure similar to calcium phosphate to adsorb OH in the mixture-The hydroxyapatite structure is formed on the surface of the phosphorous slag particles and is adsorbed to the surface of a hydration product film to cause hydration inhibition, so that slow coagulation is caused, and the more phosphorous slag powder is added, the more CaF is generated2And the more hydroxyapatite, the denser the hydration product film, the greater the resistance, resulting in a longer setting time, which affects the early strength of the concrete, resulting in a lower early strength of the concrete.
Therefore, the development of concrete which takes industrial waste phosphorous slag as an admixture and has short setting time and high early strength is a problem to be solved urgently.
Disclosure of Invention
Aiming at the defects in the prior art, the first purpose of the invention is to provide the concrete taking the industrial waste residues as the admixture, which has the advantages of short setting time, high early strength, utilization of industrial solid wastes, environmental protection and waste recycling.
The second purpose of the invention is to provide a preparation method of concrete using industrial waste residues as admixture, which has the advantages of simple process and easy operation.
In order to achieve the first object, the invention provides the following technical scheme: the concrete taking the industrial waste residues as the admixture comprises the following raw materials in parts by weight: 285 parts of cement, 360 parts of river sand, 940 parts of stone, 200 parts of water, 45-55 parts of fly ash, 45-70 parts of slag powder, 380 parts of artificial sand, 8-10 parts of additive and 100 parts of modified phosphorus slag powder;
the modified phosphorus slag powder comprises the following components in parts by weight: 3.5-4.5 parts of phosphorous slag, 0.5-1.5 parts of grinding aid, 1.9-3.2 parts of stearic acid, 1.2-1.8 parts of water reducing agent, 2.5-4 parts of water, 1.4-2.8 parts of water glass, 0.8-1.6 parts of aluminum potassium sulfate, 0.6-1.2 parts of sodium sulfate, 1.4-2.6 parts of polyacrylamide, 0.8-1.6 parts of carboxymethyl cellulose, 0.8-1.6 parts of coal gangue and 0.6-1 part of gypsum.
By adopting the technical scheme, the modified phosphorus slag powder is adopted as the mixtureThe concrete admixture reduces the cost of concrete, is beneficial to environmental protection, can change waste into valuable, uses aluminum potassium sulfate, sodium sulfate and other substances to modify phosphorus slag powder, the sodium sulfate has better excitation effect on phosphorus slag, can improve the retardation of the phosphorus slag on cement, and the sodium sulfate can react with calcium hydroxide generated by the hydration of portland cement to produce sodium hydroxide and CaSO with fine particles4·H20, compared with the original CaSO in cement4·H20, CaSO formed at this time4·H20 can react with C2A more quickly to generate 2CaO & Al2O3·CaSO4·12H20, thereby accelerating the hydration hardening speed of cement; the gypsum reacts with water to form slaked lime, the delayed coagulation of the phosphorus slag powder to cement can be improved, calcium hydroxide in a liquid phase can promote calcium hydroxide crystallization nucleation in a hydration process, the cement hydration process and the depolymerization of a phosphorus slag glass body net structure are accelerated, the calcium hydroxide in the liquid phase can react with phosphate radical ions and fluorine ions to generate precipitates so as to solidify soluble P and F, and thus the coagulation time is shortened; the water glass can form a proper alkali environment in the concrete slurry body, and the Al-O, Si-O bond in the phosphorous slag is rapidly broken to form SiO3 2-And AlO3 3-Anionic groups, with free Ca in the slurry2+The hydration products with gelling property such as C-S-H, C-A-H and the like are further generated in a combined manner, so that the fresh concrete has better early strength, and a proper amount of sodium sulfate is compounded and doped, so that the problem that the later strength is easy to shrink when water glass is singly adopted for excitation can be effectively solved; the sodium sulfate is used as the sulfate early strength agent and is matched with the water reducing agent for use, the early strength development rate of the concrete can be greatly improved, the early strength of the concrete can be ensured to be better, the later strength of the concrete can be improved, the water reducing effect is realized, the strength development can be improved, the corrosion of reinforcing steel bars in the concrete caused by early strength components is avoided, the polyacrylamide and the carboxymethyl cellulose are water-soluble solid powder, a stable and transparent colloidal solution is formed after the polyacrylamide and the carboxymethyl cellulose are dissolved in water, the sodium sulfate has the functions of thickening, suspending, dispersing, emulsifying, bonding and the like, the sodium sulfate can generate bonding effect with a cementing material hydration product, and more gel is generated by matching with the activation effect of the fly ash,the crystal skeleton is filled with pores to reduce the porosity in concrete and increase early strength, and the polyacrylamide can form emulsion with water to generate a plurality of micro lubricating films, reduce the friction force between sands, play a role in surface dispersion, improve the fluidity of concrete, reduce drying shrinkage and improve strength increase.
Further, the raw materials comprise the following components in parts by weight: 275 parts of cement, 387 parts of river sand, 955 parts of stones, 187 parts of water, 50 parts of fly ash, 57 parts of slag powder, 392 parts of artificial sand, 9 parts of an additive and 145 parts of modified phosphorus slag powder;
the modified phosphorus slag powder comprises the following components in parts by weight: 4 parts of phosphorous slag, 1 part of grinding aid, 2.5 parts of stearic acid, 1.5 parts of water reducing agent, 3 parts of water, 2.1 parts of water glass, 1.2 parts of aluminum potassium sulfate, 0.9 part of sodium sulfate, 2 parts of polyacrylamide, 1.2 parts of carboxymethyl cellulose, 1.2 parts of coal gangue and 0.8 part of gypsum.
By adopting the technical scheme, the consumption of each raw material in the concrete is more accurate, so that the prepared concrete has the advantages of quicker setting time, quicker increase of early strength and more stable later strength.
Further, the modified phosphorus slag powder is prepared by the following method: (1) drying the phosphorus slag at the temperature of 100-120 ℃ for 1-2h to ensure that the water content is less than or equal to 0.3 percent; (2) mixing a grinding aid, stearic acid, a water reducing agent and water, adding phosphorus slag, coal gangue and gypsum, uniformly mixing, and grinding, wherein the ball-material ratio is 18-20:1, grinding is carried out for 120-150min, and the particle size of mixed powder is 45-80 mu m; (3) uniformly mixing polyacrylamide and carboxymethyl cellulose with water glass, aluminum potassium sulfate and sodium sulfate, adding the mixed powder, mixing and grinding to obtain the modified phosphorus slag powder with the particle size of 20-35 mu m.
By adopting the technical scheme, the grinding aid, stearic acid and the water reducing agent are mixed and then mixed and ground with the phosphorus slag, the coal gangue and the gypsum, so that the specific surface areas of the phosphorus slag, the coal gangue and the gypsum are increased, the strength of concrete is improved, and substances such as the phosphorus slag are mixed with substances such as polyacrylamide to excite the activity of the phosphorus slag and improve the retardation of phosphorus slag powder to cement.
Furthermore, the grinding aid is prepared by mixing triisopropanolamine, triethanolamine and molasses according to the mass ratio of 1:0.2-0.5: 0.3-0.6.
By adopting the technical scheme, triisopropanolamine is used as a grinding aid, so that the activity of the phosphorus slag is improved, the mechanical property of cement doped with phosphorus slag powder is improved, the ore grinding efficiency is improved, the formation and the expansion of material particle cracks are accelerated, the fluidity is improved, the specific surface area is increased, and the early strength and the later strength of concrete are improved.
Furthermore, the continuous gradation of the particle size of the stones is 5-31.5mm, the mud content is 0.2-0.5%, the artificial sand is coarse sand, the fineness modulus is 3.1-3.3, and the stone powder content is 1.9-2.3%; the fineness modulus of the river sand is 2.8-3.0, and the mud content is 2.0-2.4%.
By adopting the technical scheme, the river sand has high hardness and good wear resistance, and the content of clay and other harmful impurities is low, so that the scouring resistance of the concrete is good, the fineness modulus is proper, the concrete has better workability, the construction workability is good, the stirring is easy, the concrete can be filled in the pores among the coarse aggregates, the compactness and the strength of the concrete are improved, the porosity in the concrete is reduced, the segregation and bleeding of the concrete are reduced, and the strength of the concrete is improved; the mud content in the stones is appropriate, the strength of the concrete can be effectively improved, the particles are prevented from being large, the pores among the aggregates are large, the strength of the concrete is low, reasonable grading is formed among the aggregates, the river sand, the fly ash and the slag powder, the compactness of the concrete can be improved, and the strength and the wear resistance of the concrete are improved.
Further, the additive is a water reducing agent which is one or a composition of two of a polycarboxylic acid high-efficiency water reducing agent and a naphthalene sulfonate formal series high-efficiency water reducing agent.
By adopting the technical scheme, the high-efficiency water reducing agent has certain promotion effect on the hydration of cement, and the naphthalene sulfonate formal series high-efficiency water reducing agent can be adsorbed on the surface of particles, so that the mutual repulsion effect among the particles is increased, the cement particles are promoted to be dispersed, water wrapped by the flocculating constituents is released, the purpose of reducing water is achieved, the viscosity of cement paste is reduced, and the fluidity is improved.
Further, the fly ash is F-class II fly ash, the fineness (the screen residue of a 45-micron square-hole screen) is less than or equal to 12 percent, the water demand ratio is 95-98 percent, and the ignition loss is less than or equal to 4.5 percent; the slag powder is S95-grade slag powder, the specific surface area of the slag powder is 400-450m2/kg, the 28-day activity index is 95%, and the fluidity ratio is 99%.
By adopting the technical scheme, the active ingredients of the fly ash are silicon dioxide and aluminum oxide, and the fly ash can generate a stable cementing material after being mixed with cement and water, so that the concrete has higher strength, meanwhile, more than 70% of particles in the fly ash are amorphous spherical glass bodies, and mainly play a role of a ball bearing, play a lubricating role in a concrete mixture, improve the workability of the concrete mixture, and the fly ash and broken stones form reasonable grading, so that the fly ash and the broken stones are mutually filled, the compactness of the concrete can be effectively increased, and the compressive strength of the concrete is further improved; the mineral admixture of the slag powder has a plurality of comprehensive effects such as an active effect, an interface effect, a micro-filling effect, a water reducing effect and the like, and the mineral admixture of the slag powder and the like can improve rheological property, reduce hydration heat, reduce slump loss, reduce segregation and bleeding, improve the pore structure and mechanical property of a concrete structure and improve later strength and durability.
Further, the raw materials also comprise recycled building micro powder, the consumption of the recycled building micro powder is 45-80 parts, and the recycled building micro powder comprises building waste powder, modified steel slag and modified zeolite with the mass ratio of 1:0.6-0.8: 0.7-0.9.
By adopting the technical scheme, the recycled building micro powder prepared from the building waste powder, the modified steel slag and the modified zeolite is doped into the concrete, so that the building waste is recycled, the resources are saved, the cost is reduced, the stacking of the building waste is reduced, and the concrete is environment-friendly; with the development of society, vehicles are gradually increased, the emission of automobile exhaust is large, the environment and the human body are easily damaged, and when the concrete is used for buildings or roads, the modified steel slag and the modified zeolite can quickly adsorb and degrade nitrogen oxides volatilized by automobiles, so that the harm of the nitrogen oxides to the human body and the environment is reduced.
Further, the preparation method of the modified steel slag comprises the following steps: mixing the steel slag and sodium hydroxide according to the mass ratio of 1:9-11, stirring for 20-25h, drying at 80-85 ℃, and calcining at 790-820 ℃ for 55-60 min;
the preparation method of the modified zeolite comprises the following steps: mixing zeolite, quaternary ammonium salt, silane coupling agent and water according to the mass ratio of 1:0.3-0.5:0.5-0.8:3-5, stirring for 2-3h, cleaning with ethanol, drying in an oven at 110 ℃ of 100-.
By adopting the technical scheme, the steel slag is loose and porous, has large specific surface area and certain adsorption capacity, the quaternary ammonium salt modified sodium zeolite connected by covalent bonds is prepared by using the quaternary ammonium salt, the silane coupling agent and the sodium chloride solution, the nitrogen oxides in the automobile exhaust can be effectively adsorbed and removed, the adsorption capacity of the saturated modified zeolite can be recovered by the sodium chloride solution, the saturated modified zeolite can be adsorbed for many times in a circulating manner, and the modified steel slag can be matched with the modified steel slag for use, so that the adsorption time of the concrete on the nitrogen oxides is long, and the adsorption effect is good.
In order to achieve the second object, the invention provides the following technical scheme: a preparation method of concrete taking industrial waste residues as admixture comprises the following steps:
s1, adding cement, river sand and water into the modified phosphorus slag powder, and fully stirring to obtain cement paste;
and S2, adding stones, fly ash, slag powder, artificial sand and additives into the cement paste, and uniformly stirring to obtain the concrete.
In conclusion, the invention has the following beneficial effects:
firstly, because the phosphorus slag is modified by adopting the sodium silicate, the sodium sulfate, the aluminum potassium sulfate and other substances, the sodium sulfate and the sodium silicate have better excitation effect on the phosphorus slag, the sodium sulfate and the sodium silicate can react with calcium hydroxide generated by the hydration of portland cement, the hydration hardening speed of the cement is accelerated, the setting time is shortened, and the early strength of the concrete can be greatly improved and the corrosion of early strength components to reinforcing steel bars in the concrete is reduced by matching the sodium sulfate and the water reducing agent.
Secondly, in the invention, polyacrylamide and carboxymethyl cellulose are preferably adopted to modify the phosphorus slag, and because the polyacrylamide and carboxymethyl cellulose have the functions of thickening, suspending, dispersing, emulsifying, bonding and the like, and are matched with the fly ash, the phosphorus slag modified material can fill skeleton pores in concrete, reduce porosity, increase early strength, reduce friction among raw materials, play a role in surface dispersion, improve the fluidity of the concrete and reduce drying shrinkage.
Thirdly, the recycled building micro powder prepared from the building waste micro powder, the modified zeolite and the modified steel slag is doped into the concrete, so that the concrete can adsorb and reduce nitric oxides in automobile exhaust, reduce the harm of the automobile exhaust to the environment and human bodies and purify air while the building waste is recycled and the environmental problem caused by stacking of the building waste is reduced.
Detailed Description
The present invention will be described in further detail with reference to examples.
Preparation examples 1 to 3 of modified phosphorus slag powder
Preparation examples 1 to 3 the sulfamate-based superplasticizer was selected from the sulfamate-based superplasticizer sold under the brand name of "HAS" by Qingdao Anxue high molecular materials Co., Ltd, the naphthalene-based superplasticizer was selected from the naphthalene-based superplasticizer sold under the brand name of "Yiyiji Seisakudi New building materials Co., Ltd, the polycarboxylic acid-based superplasticizer was selected from the polycarboxylic acid-based superplasticizer sold under the brand name of" TC "by Beijing concrete Heligui science Co., Ltd, the molasses was selected from the molasses sold under the brand name of 65 by Jinan Union chemical Co., Ltd, the polyacrylamide was selected from the polyacrylamide sold under the brand name of PAM by Zhenzhou Zinkun environmental protection science Co., Ltd, the carboxymethyl cellulose was selected from the carboxymethyl cellulose sold under the brand name of 027 by Xinjiang cellulose factory, and the sodium lignosulfonate was selected from the sodium lignosulfonate sold under the brand name of Zhenzhou Yuqiang Yuqiao import and export Co., Ltd, the stearic acid is selected from stearic acid sold by Ningbo rubber plastic materials Co.Ltd under model number SA-1840.
Preparation example 1: (1) according to the raw material proportion in the table 1, the phosphorous slag is dried for 2 hours at the temperature of 100 ℃ to ensure that the water content is less than or equal to 0.3 percent; (2) mixing 0.5kg of grinding aid, 1.9kg of stearic acid, 1.2kg of water reducing agent and 2.5kg of water, adding 3.5kg of phosphorous slag, 0.8kg of coal gangue and 0.6kg of gypsum, uniformly mixing, and then grinding for 120min, wherein the ball-to-material ratio is 18:1, the grinding time is 120min, the particle size of mixed powder is 45 mu m, the grinding aid is prepared by mixing triisopropanolamine, triethanolamine and molasses according to the mass ratio of 1:0.2:0.3, the water reducing agent is sodium lignosulfonate, and the chemical components of the phosphorous slag are shown in Table 2; (3) 1.4kg of polyacrylamide, 0.8kg of carboxymethyl cellulose, 1.4kg of water glass, 0.8kg of aluminum potassium sulfate and 0.6kg of sodium sulfate are uniformly mixed, mixed powder is added, and the mixture is mixed and ground to prepare modified phosphorous slag powder with the particle size of 20 microns.
TABLE 1 raw material proportions of modified phosphorus slag powders in preparation examples 1 to 3
TABLE 2 chemical composition of phosphorous slag in preparation examples 1-3
| ％ | SiO2 | Al2O3 | CaO | Fe2O3 | MgO | Na2O | K2O | P2O5 | SO3 | TiO2 | Loss |
| Phosphorous slag | 38.09 | 9.24 | 43.74 | 0.48 | 2.61 | 0.35 | 0.66 | 2.96 | 2.45 | 0.82 | 0.31 |
Preparation example 2: (1) according to the raw material proportion in the table 1, the phosphorous slag is dried for 1.5h at the temperature of 110 ℃ to ensure that the water content is less than or equal to 0.3 percent; (2) mixing 1kg of grinding aid, 2.5kg of stearic acid, 1.5kg of water reducing agent and 3kg of water, adding 4kg of phosphorus slag, 1.2kg of coal gangue and 0.8kg of gypsum, uniformly mixing, and then grinding, wherein the ball-material ratio is 19:1, the grinding time is 135min, the particle size of the mixed powder is 60 mu m, the grinding aid is prepared by mixing triisopropanolamine, triethanolamine and molasses according to the mass ratio of 1:0.4:0.5, the water reducing agents are an aminosulfonate high-efficiency water reducing agent and a naphthalene high-efficiency water reducing agent with the mass ratio of 1:1, and the chemical components of the phosphorus slag are shown in Table 2; (3) 2kg of polyacrylamide, 1.2kg of carboxymethyl cellulose, 2.1kg of water glass, 1.2kg of aluminum potassium sulfate and 0.9kg of sodium sulfate are uniformly mixed, mixed powder is added, and the mixture is mixed and ground to prepare modified phosphorus slag powder with the particle size of 30 microns.
Preparation example 3: (1) according to the raw material proportion in the table 1, the phosphorous slag is dried for 1h at 120 ℃ to ensure that the water content is less than or equal to 0.3 percent; (2) mixing 1.5kg of grinding aid, 3.2kg of stearic acid, 1.8kg of water reducing agent and 4kg of water, adding 4.5kg of phosphorous slag, 1.6kg of coal gangue and 1kg of gypsum, uniformly mixing, and then grinding, wherein the ball-to-material ratio is 20:1, the grinding time is 150min, the particle size of mixed powder is 80 mu m, the grinding aid is prepared by mixing triisopropanolamine, triethanolamine and molasses according to the mass ratio of 1:0.5:0.6, the water reducing agent is a polycarboxylic acid-series high-efficiency water reducing agent, and the chemical components of the phosphorous slag are shown in Table 2; (3) uniformly mixing 2.6kg of polyacrylamide, 1.6kg of carboxymethyl cellulose, 2.8kg of water glass, 1.6kg of aluminum potassium sulfate and 1.2kg of sodium sulfate, adding the mixed powder, mixing and grinding to obtain the modified phosphorus slag powder with the particle size of 35 mu m.
Examples
In the following examples, the polycarboxylate superplasticizer is selected from a polycarboxylate superplasticizer sold by Beijing concrete banghui science and technology Limited and having the model number TC, and the naphthalene sulfonate formal superplasticizer is selected from a naphthalene sulfonate formal superplasticizer sold by Huainan science and technology Limited and having the model number UNF-2.
Example 1: the raw material formulation of the concrete taking the industrial waste residue as the admixture is shown in Table 3, and the preparation method of the concrete taking the industrial waste residue as the admixture comprises the following steps:
s1, 100kg/m3265kg/m of modified phosphorus slag powder is added3Cement, 360kg/m3River sand and 160kg/m3Water, fully stirring to obtain cement paste; the modified phosphorus slag powder is prepared by the preparation example 1, the cement is P.O42.5 Portland cement, the fineness modulus of river sand is 2.8, and the mud content is 2.0 percent;
s2, adding 940kg/m into the cement paste3Pebble, 45kg/m345kg/m of fly ash3Slag powder, 380kg/m3Artificial sand and 8kg/m3Adding additive, stirring uniformly to obtain concrete, making stone continuous gradation with grain size of 5-31.5mm, using flyash whose mud content is 0.2% as class F class II flyash and its fineness (45 micrometer square hole)The screen allowance) is less than or equal to 12 percent, the water requirement ratio is 95 percent, the ignition loss is less than or equal to 4.5 percent, the slag powder is S95-grade slag powder, and the specific surface area of the slag powder is 400m2In terms of volume/kg, the 28-day activity index is 95%, the fluidity ratio is 99%, the artificial sand is coarse sand, the fineness modulus is 3.1, the stone powder content is 1.9%, the additive is a water reducing agent, the water reducing agent is a polycarboxylic acid high-efficiency water reducing agent, and the chemical components of cement, fly ash and slag powder are shown in table 4.
TABLE 3 concrete raw material ratios using industrial waste residues as admixtures in examples 1 to 5
Table 4 chemical composition of cement, fly ash and slag powder in examples 1-5
| W/％ | SiO2 | Al2O3 | CaO | Fe2O3 | MgO | Na2O | K2O | P2O5 | SO3 | TiO2 | Loss |
| Cement | 21.3 | 5.79 | 60.15 | 2.53 | 2.35 | 0.72 | / | / | 2.54 | / | 0.72 |
| Slag powder | 30.97 | 11.4 | 37.59 | 1.79 | 7.6 | 0.37 | 0.66 | / | 0.22 | 2.65 | 1.01 |
| Fly ash | 49.05 | 25.85 | 4.01 | 15.68 | 1.15 | / | / | / | / | / | 1.76 |
Example 2: the raw material formulation of the concrete taking the industrial waste residue as the admixture is shown in Table 3, and the preparation method of the concrete taking the industrial waste residue as the admixture comprises the following steps:
s1, 120kg/m3270kg/m of modified phosphorus slag powder is added3375kg/m cement3River sand and 174kg/m3Water, fully stirring to obtain cement paste; the modified phosphorus slag powder is prepared by the preparation example 2, the cement is P.O42.5 Portland cement, the fineness modulus of river sand is 2.9, and the mud content is 2.2%;
s2, adding 947kg/m into the cement paste3Pebble, 48kg/m3Fly ash, 51kg/m3Slag powder, 386kg/m3Artificial sand and 8.5kg/m3The admixture is evenly stirred to prepare the concrete, the particle size of the stones is 5-31.5mm, the mud content is 0.3 percent, the fly ash is class F class II fly ash, the fineness (the residue of a square-hole sieve with 45 mu m) is less than or equal to 12 percent, the water demand ratio is 97 percent, the ignition loss is less than or equal to 4.5 percent, the slag powder is S95 grade slag powder, and the specific surface area of the slag powder is 430m2In terms of volume/kg, the 28-day activity index is 95%, the fluidity ratio is 99%, the artificial sand is coarse sand, the fineness modulus is 3.2, the content of the stone powder is 2.1%, the additive is a water reducing agent, the water reducing agent is a naphthalene sulfonate formal series high-efficiency water reducing agent, and the chemical components of cement, fly ash and slag powder are shown in table 4.
Example 3: the raw material formulation of the concrete taking the industrial waste residue as the admixture is shown in Table 3, and the preparation method of the concrete taking the industrial waste residue as the admixture comprises the following steps:
s1, 145kg/m3275kg/m of modified phosphorus slag powder is added3Cement of 387kg/m3River sand and 187kg/m3Water, fully stirring to obtain cement paste; the modified phosphorus slag powder is prepared by preparation example 3, wherein the cement is P.O42.5 portland cement, the fineness modulus of river sand is 3.0, and the mud content is 2.4%;
s2, adding 955kg/m into the cement paste350kg/m of pebbles3Fly ash, 57kg/m3Slag powder, 392kg/m3Artificial sand and 9kg/m3The admixture is evenly stirred to prepare the concrete, the particle size of stones is 5-31.5mm, the mud content is 0.5 percent, the fly ash is class F class II fly ash, the fineness (the residue of a square-hole sieve with 45 mu m) is less than or equal to 12 percent, the water demand ratio is 98 percent, the ignition loss is less than or equal to 4.5 percent, the slag powder is S95 grade slag powder, and the specific surface area of the slag powder is 450m2In terms of volume/kg, the 28-day activity index is 95%, the fluidity ratio is 99%, the artificial sand is coarse sand, the fineness modulus is 3.3, the content of the stone powder is 2.3%, the additive is a water reducing agent, the water reducing agent is a naphthalene sulfonate formal series high-efficiency water reducing agent, and the chemical components of cement, fly ash and slag powder are shown in table 4.
Examples 4 to 5: a concrete using industrial waste residues as admixture is different from the concrete of example 1 in that the raw material formulation is shown in Table 3.
Example 6: a concrete using industrial waste residue as admixture is different from the concrete of the embodiment 1 in that 45kg/m is further mixed in the step S13The recycled building micro powder comprises building waste powder, modified steel slag and modified zeolite in a mass ratio of 1:0.6:0.7, the particle size of the building waste powder is 5mm, and the preparation method of the modified steel slag comprises the following steps: mixing the steel slag with 25% sodium hydroxide according to the mass ratio of 1:9, stirring for 20h, drying at 80 ℃, and finally calcining at 790 ℃ for 60 min; the preparation method of the modified zeolite comprises the following steps: mixing zeolite, quaternary ammonium salt, silane coupling agent and water according to the mass ratio of 1:0.3:0.5:3, stirring for 2h, and adding BCleaning with alcohol, drying in an oven at 100 deg.C for 3h, grinding into powder, adding 8% sodium chloride solution, stirring at 24 deg.C for 2h, washing with deionized water to neutrality, drying at 100 deg.C for 3h, grinding and sieving with 350 mesh sieve to obtain octadecyl trimethyl ammonium chloride as quaternary ammonium salt and KH550 as silane coupling agent.
Example 7: a concrete using industrial waste residue as admixture is different from the concrete of the embodiment 1 in that 60kg/m is further mixed in the step S13The recycled building micro powder comprises building waste powder, modified steel slag and modified zeolite in a mass ratio of 1:0.7:0.8, the particle size of the building waste powder is 10mm, and the preparation method of the modified steel slag comprises the following steps: mixing the steel slag with 25% sodium hydroxide according to the mass ratio of 1:10, stirring for 23h, drying at 83 ℃, and finally calcining at 800 ℃ for 55 min; the preparation method of the modified zeolite comprises the following steps: mixing zeolite, quaternary ammonium salt, a silane coupling agent and water according to a mass ratio of 1:0.4:0.6:4, stirring for 2.5h, cleaning with ethanol, drying in an oven at 105 ℃ for 2.5h, grinding into powder, adding a sodium chloride solution with a mass concentration of 10%, stirring at 25 ℃ for 2.5h, washing with deionized water to neutrality, drying at 105 ℃ for 2.5h, grinding and sieving with a 350-mesh sieve, wherein the quaternary ammonium salt is octadecyl trimethyl ammonium chloride, and the silane coupling agent is KH 550.
Example 8: a concrete using industrial waste residue as admixture is different from the concrete of the embodiment 1 in that 80kg/m is further mixed in the step S13The recycled building micro powder comprises building waste powder, modified steel slag and modified zeolite in a mass ratio of 1:0.8:0.9, the particle size of the building waste powder is 15mm, and the preparation method of the modified steel slag comprises the following steps: mixing the steel slag with 25% sodium hydroxide according to the mass ratio of 1:11, stirring for 25h, drying at 85 ℃, and finally calcining at 820 ℃ for 55 min; the preparation method of the modified zeolite comprises the following steps: mixing zeolite, quaternary ammonium salt, silane coupling agent and water according to the mass ratio of 1:0.5:0.8:5, stirring for 2h, cleaning with ethanol, drying in an oven at 110 deg.C for 2h, grinding into powder, adding 12% sodium chloride solution, stirring at 26 deg.C for 2h, and mixing with waterWashing with deionized water to neutrality, drying at 110 deg.C for 2 hr, grinding, and sieving with 350 mesh sieve to obtain octadecyl trimethyl ammonium chloride as quaternary ammonium salt and KH550 as silane coupling agent.
Comparative example
Comparative example 1: the concrete taking the industrial waste residues as the admixture is different from the concrete in the embodiment 1 in that no water glass, aluminum potassium sulfate and sodium sulfate are added into the modified phosphorus slag powder.
Comparative example 2: the concrete taking the industrial waste residues as the admixture is different from the concrete in the embodiment 1 in that sodium sulfate, aluminum potassium sulfate and a water reducing agent are not added into the modified phosphorus slag powder.
Comparative example 3: the concrete taking industrial waste residues as admixture is different from the concrete in the embodiment 1 in that polyacrylamide and carboxymethyl cellulose are not added into the modified phosphorus residue powder.
Comparative example 4: the concrete taking the industrial waste residues as the admixture is different from the concrete in the embodiment 1 in that coal gangue and gypsum are not added into the modified phosphorus slag powder.
Comparative example 5: the concrete taking industrial waste residues as admixture is different from the concrete in example 1 in that the mass ratio of triisopropanolamine, triethanolamine and molasses in the grinding aid in the modified phosphorus slag powder is 1:0.1: 0.2.
Comparative example 6: the concrete taking industrial waste residues as admixture is different from the concrete in example 1 in that the mass ratio of triisopropanolamine, triethanolamine and molasses in the grinding aid in the modified phosphorus slag powder is 1:0.6: 0.7.
Comparative example 7: the concrete taking the industrial waste residues as the admixture is different from the concrete in example 1 in that triethanolamine, ethylene glycol and propylene glycol are mixed in a grinding aid in the modified phosphorus residue powder according to the mass ratio of 1:0.2: 0.3.
Comparative example 8: the concrete taking industrial waste residues as admixture is different from the concrete in the embodiment 6 in that no modified steel slag is added into the recycled building micro powder.
Comparative example 9: the concrete with industrial waste residue as admixture is different from the concrete in the embodiment 6 in that no modified zeolite is added into the regenerated building micro powder.
Comparative example 10: the concrete taking industrial waste residues as admixture is different from the concrete in the embodiment 6 in that modified steel slag and modified zeolite are not added into the recycled building micro powder.
Comparative example 11: the high-strength anti-cracking concrete prepared in example 1 of the Chinese patent with the application number of 201210561818.1 is used as a contrast and comprises the following components in parts by weight: cement: 400kg, silica fume: 50kg, waste rock: 1000kg, fly ash: 500kg, water reducing agent: 10kg, water: 200 kg.
Performance test
Firstly, detecting the setting time and the compressive strength: concrete mixtures were prepared according to the methods of examples 1-8 and comparative examples 1-11 and the properties of the concrete mixtures were tested according to the following methods, and the test data are recorded in table 5:
1. setting time: detecting according to GB/T50080-2016 concrete mixture setting time test;
2. slump: detecting according to GB/T50080-2002 standard of common concrete mixture performance test method;
3. compressive strength: the detection is carried out according to GB/T50081-2002 standard of test methods for mechanical properties of common concrete.
TABLE 5 test results of Properties of concrete mixtures prepared in examples 1 to 8 and comparative examples 1 to 11
As can be seen from the data in Table 5, the concrete mixtures prepared by the methods in the embodiments 1 to 8 have good cohesiveness, workability and fluidity, the initial setting time of the concrete is 184-206min, the final setting time is 251-273min, the setting time is shortened, the 3d compressive strength is 17.4-28.5MPa, the 28d compressive strength is 38.5-40.2MPa, and the mechanical properties all meet the construction requirements.
Comparative example 1 since no water glass, aluminum potassium sulfate and sodium sulfate were added to the modified phosphorous slag powder, it can be seen from the data in the table that the setting time of the concrete mixture was long and the early strength was reduced.
Comparative example 2 since sodium sulfate, potassium aluminum sulfate and a water reducing agent are not added to the modified phosphorous slag powder, the concrete mixture prepared in comparative example 2 has a faster setting speed, but early strength and late strength are reduced.
Comparative example 3 because polyacrylamide and carboxymethyl cellulose were not added to the modified phosphorous slag powder, the early strength and the late strength of the concrete mixture were not much different from those of example 1, but the setting time of the concrete was significantly prolonged.
In comparative example 4, since no coal gangue and gypsum are added to the modified phosphorous slag powder, the setting time of the concrete mixture is long, and the early compressive strength and the later compressive strength are reduced.
Comparative example 5 the setting time of the concrete mixes prepared in comparative example 5 and comparative example 6 was not much different from that of example 1, but the early strength and the late strength were reduced because the grinding aid used triisopropanolamine, triethanolamine and molasses in a mass ratio of 1:0.1:0.2 and comparative example 6 used triisopropanolamine, triethanolamine and molasses in a mass ratio of 1:0.6: 0.7.
Comparative example 7 the setting time of the resulting blend was extended and the compressive strength was reduced by using triethanolamine, ethylene glycol and propylene glycol as grinding aids in a mass ratio of 1:0.2: 0.3.
Comparative example 8 since no modified steel slag was added to the recycled building micropowder, and comparative example 9 since no modified zeolite was added to the recycled building micropowder, the concrete mixtures prepared in comparative example 8 and comparative example 9 had a reduced setting time, but had a reduced compressive strength as compared to example 1.
Comparative example 10 since the recycled building micropowder is not added with the modified steel slag and the modified zeolite at the same time, it can be seen from comparison that the concrete mixture prepared in comparative example 10 has a remarkably reduced compressive strength compared with comparative examples 8 and 9.
Comparative example 11 is a concrete prepared by using industrial wastes in the prior art, and it is known from the test results that the setting time is long and the compressive strength is inferior to that of the concrete prepared in examples 1 to 8 of the present invention.
Secondly, detecting the purification rate of the nitrogen oxide: concrete mixes were prepared according to the methods of examples 6 to 8 and comparative examples 8 to 11 and cured and formed under standard conditions to prepare test pieces of 20cm × 20cm, 10 pieces of each of the concrete test pieces prepared in each example and each comparative example were placed in sealed glass containers of the same specification, nitrogen oxide of the same solubility was charged into each glass container, the initial concentration was recorded as c1, the concentration of nitrogen oxide in each glass container at 12 hours, 24 hours and 48 hours was measured as c2 with a naphthyl ethylenediamine hydrochloride spectrophotometer, and the purification ratio (%) of nitrogen oxide was calculated according to the following formula: (c1-c2)/c 1X 100%, the test results of 10 concrete test pieces prepared in the same example or comparative example were averaged and the test results were recorded in Table 6.
TABLE 6 purification rates of nitrogen oxides of concrete test pieces prepared in examples 6 to 8 and comparative examples 8 to 11
As can be seen from the data in Table 6, in examples 6-8, the modified steel slag, the steel slag phosphorous slag powder and the building micro powder are mixed and added into the concrete, so that the concrete has a purification effect on nitrogen oxides, and the purification effect is higher, and can reach 98.2-99.4% within 48 h.
In the comparative example 8, the regenerated building micro powder is not added with the modified steel slag, and in the comparative example 9, the regenerated building micro powder is not added with the modified zeolite, so that the detection result shows that the concrete test block has low purification rate of nitrogen oxide and poor purification effect.
Comparative example 10 since the modified zeolite and the modified steel slag were not added to the recycled building micropowder, the concrete sample prepared in comparative example 10 was significantly deteriorated in purification effect as compared with examples 6, 8 and 9.
Comparative example 11 is a concrete test block prepared by using industrial waste in the prior art, and has low purification rate of nitrogen oxide and poor purification effect.
Application example: according to the preparation examples1, mixing the modified phosphorus slag powder into concrete with different strength grades according to the raw material proportion in the table 7, wherein the cement is P.O42.5 portland cement, the fineness modulus of river sand is 2.8, and the mud content is 2.0%; the particle size of the stones is 5-31.5mm, the fly ash with the mud content of 0.2 percent is class F II fly ash, the fineness (the residue of a square-hole sieve with the size of 45 mu m) is less than or equal to 12 percent, the water demand ratio is 95 percent, the ignition loss is less than or equal to 4.5 percent, the slag powder is S95-grade slag powder, the specific surface area of the slag powder is 400m2The concrete admixture/kg-concrete admixture composite material has an activity index of 95% in 28 days, a fluidity ratio of 99%, coarse artificial sand, a fineness modulus of 3.1, stone powder content of 1.9%, a water reducing agent serving as an additive, a polycarboxylic acid high-efficiency water reducing agent serving as a water reducing agent, and chemical components of cement, fly ash and slag powder shown in table 4, wherein the setting time is detected according to GB/T50080-2016 (concrete mixture setting time test), the compressive strength is detected according to GB/T50081-2002 (Standard test method for mechanical properties of ordinary concrete), and the detection results are recorded in table 8.
TABLE 7 mixing proportion of concrete with different strength grades and modified phosphorus slag powder
TABLE 8 Performance testing of concretes of different strength grades made with modified phosphorous slag powder
As can be seen from the data in Table 8, the modified phosphorous slag powder prepared in preparation example 1 is blended into concrete of different strength grades, and the prepared concrete has the advantages of short setting time, high early strength and high later strength.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Claims (10)
1. The concrete taking the industrial waste residues as the admixture is characterized by comprising the following raw materials in parts by weight: 285 parts of cement, 360 parts of river sand, 940 parts of stone, 200 parts of water, 45-55 parts of fly ash, 45-70 parts of slag powder, 380 parts of artificial sand, 8-10 parts of additive and 100 parts of modified phosphorus slag powder;
the modified phosphorus slag powder comprises the following components in parts by weight: 3.5-4.5 parts of phosphorous slag, 0.5-1.5 parts of grinding aid, 1.9-3.2 parts of stearic acid, 1.2-1.8 parts of water reducing agent, 2.5-4 parts of water, 1.4-2.8 parts of water glass, 0.8-1.6 parts of aluminum potassium sulfate, 0.6-1.2 parts of sodium sulfate, 1.4-2.6 parts of polyacrylamide, 0.8-1.6 parts of carboxymethyl cellulose, 0.8-1.6 parts of coal gangue and 0.6-1 part of gypsum.
2. The concrete taking the industrial waste residues as the admixture according to claim 1, wherein the weight portions of the raw materials are as follows: 275 parts of cement, 387 parts of river sand, 955 parts of stones, 187 parts of water, 50 parts of fly ash, 57 parts of slag powder, 392 parts of artificial sand, 9 parts of an additive and 145 parts of modified phosphorus slag powder;
the modified phosphorus slag powder comprises the following components in parts by weight: 4 parts of phosphorous slag, 1 part of grinding aid, 2.5 parts of stearic acid, 1.5 parts of water reducing agent, 3 parts of water, 2.1 parts of water glass, 1.2 parts of aluminum potassium sulfate, 0.9 part of sodium sulfate, 2 parts of polyacrylamide, 1.2 parts of carboxymethyl cellulose, 1.2 parts of coal gangue and 0.8 part of gypsum.
3. The concrete with the industrial waste residue as the admixture of any one of claims 1-2, wherein the modified phosphorous slag powder is prepared by the following method: (1) drying the phosphorus slag at the temperature of 100-120 ℃ for 1-2h to ensure that the water content is less than or equal to 0.3 percent; (2) mixing a grinding aid, stearic acid, a water reducing agent and water, adding phosphorus slag, coal gangue and gypsum, uniformly mixing, and grinding, wherein the ball-material ratio is 18-20:1, grinding is carried out for 120-150min, and the particle size of mixed powder is 45-80 mu m; (3) uniformly mixing polyacrylamide and carboxymethyl cellulose with water glass, aluminum potassium sulfate and sodium sulfate, adding the mixed powder, mixing and grinding to obtain the modified phosphorus slag powder with the particle size of 20-35 mu m.
4. The concrete with the industrial waste residue as the admixture of any one of claims 1-2, wherein the grinding aid is prepared by mixing triisopropanolamine, triethanolamine and molasses according to the mass ratio of 1:0.2-0.5: 0.3-0.6.
5. The concrete using industrial waste residues as admixtures according to any one of claims 1-2, wherein the continuous gradation of stone particle size of 5-31.5mm, the mud content is 0.2-0.5%, the artificial sand is coarse sand, the fineness modulus is 3.1-3.3, and the stone powder content is 1.9-2.3%; the fineness modulus of the river sand is 2.8-3.0, and the mud content is 2.0-2.4%.
6. The concrete taking the industrial waste residue as the admixture according to any one of claims 1 to 2, wherein the admixture is a water reducing agent, and the water reducing agent is one or a combination of a polycarboxylic acid high-efficiency water reducing agent and a naphthalene sulfonate formal high-efficiency water reducing agent.
7. The concrete using industrial waste residues as admixtures according to any one of claims 1-2, wherein the fly ash is class F class ii fly ash, the fineness (45 μm square mesh screen residue) is 12% or less, the water demand ratio is 95-98%, and the loss on ignition is 4.5% or less; the slag powder is S95-grade slag powder, the specific surface area of the slag powder is 400-450m2/kg, the 28-day activity index is 95%, and the fluidity ratio is 99%.
8. The concrete taking the industrial waste residue as the admixture as recited in any one of claims 1 to 2, wherein the raw material further comprises recycled building micro powder, the amount of the recycled building micro powder is 45 to 80 parts, and the recycled building micro powder comprises the building waste powder, the modified steel slag and the modified zeolite in a mass ratio of 1:0.6 to 0.8:0.7 to 0.9.
9. The concrete using the industrial waste residue as the admixture as defined in claim 8, wherein the modified steel slag is prepared by the following steps: mixing the steel slag and sodium hydroxide according to the mass ratio of 1:9-11, stirring for 20-25h, drying at 80-85 ℃, and calcining at 790-820 ℃ for 55-60 min;
the preparation method of the modified zeolite comprises the following steps: mixing zeolite, quaternary ammonium salt, silane coupling agent and water according to the mass ratio of 1:0.3-0.5:0.5-0.8:3-5, stirring for 2-3h, cleaning with ethanol, drying in an oven at 110 ℃ of 100-.
10. A method for preparing concrete blended with industrial waste residues according to any one of claims 1 to 9, comprising the steps of:
s1, adding cement, river sand, recycled building micro powder and water into the modified phosphorus slag powder, and fully stirring to obtain cement paste;
and S2, adding stones, fly ash, slag powder, artificial sand and additives into the cement paste, and uniformly stirring to obtain the concrete.
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