CN110330242B - Composite alkali-activated solid waste type high-performance inorganic adhesive and preparation method thereof - Google Patents
Composite alkali-activated solid waste type high-performance inorganic adhesive and preparation method thereof Download PDFInfo
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- CN110330242B CN110330242B CN201910605527.XA CN201910605527A CN110330242B CN 110330242 B CN110330242 B CN 110330242B CN 201910605527 A CN201910605527 A CN 201910605527A CN 110330242 B CN110330242 B CN 110330242B
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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
- C04B7/00—Hydraulic cements
- C04B7/14—Cements containing slag
- C04B7/147—Metallurgical slag
- C04B7/153—Mixtures thereof with other inorganic cementitious materials or other activators
- C04B7/1535—Mixtures thereof with other inorganic cementitious materials or other activators with alkali metal containing activators, e.g. sodium hydroxide or waterglass
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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
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Abstract
The invention discloses a composite alkali-activated solid waste type high-performance inorganic adhesive and a preparation method thereof, belonging to the field of solid waste resource utilization. The inorganic glue comprises slag micro powder, steel slag micro powder, laterite-nickel ore slag ultra-fine powder, ferrochrome slag ultra-fine powder, a composite alkali activator, graphene oxide and water. The slag micro powder is granulated blast furnace slag micro powder. The steel slag micro powder is one or more of hot stuffy slag micro powder, air quenching slag micro powder, molten iron desulphurization slag micro powder, casting slag micro powder, converter hot splashing slag micro powder, converter roller slag micro powder, electric furnace hot splashing slag micro powder and electric furnace roller slag micro powder. The invention not only reduces the production cost of the existing inorganic adhesive, but also improves the high temperature resistance and the shearing force of the inorganic adhesive, realizes the integration of the high temperature resistance and the high shearing force in the inorganic adhesive, and greatly enhances the market competitiveness and the application range of the inorganic adhesive; develops a new idea of large-scale and high-added-value application of slag, steel slag, laterite-nickel slag and ferrochrome slag.
Description
Technical Field
The invention belongs to the field of solid waste resource utilization, and particularly relates to a composite alkali-activated solid waste type high-performance inorganic adhesive and a preparation method thereof.
Background
Slag is a by-product of a blast furnace iron making process, and its main components are melts of silicates and aluminosilicates. The steel slag is solid waste produced in the steel-making process, and the main components of the steel slag are CaO and Fe2O3、Al2O3、SiO2、MgO、P2O5、MnO、SO3And a small amount of free calcium oxide. The laterite-nickel slag is a nonmetallic mineral which is mainly a nonmetallic mineral and is generated after laterite-nickel ore is subjected to acid leaching to recover the metallic mineral, and the main component of the nonmetallic mineral is SiO2、CaO、Al2O3、MgO、MnO、Cr2O3FeO, and the like. The ferrochromium slag is chromium-containing waste slag generated in the process of smelting chromium-containing ferroalloy by a pyrogenic process, mainly generated in the process of smelting high-carbon ferrochromium by a submerged arc furnace process, and mainly comprises SiO2、MgO、Al2O3、Cr2O3、Fe2O3、CaO、SO3、P2O5And the like. At present, a large amount of slag, steel slag, laterite-nickel slag and ferrochrome slag are piled up, which not only occupies valuable land, but also can cause environmental pollution and land pollutionThe sewage causes pollution. Therefore, how to utilize slag, steel slag, laterite-nickel slag and ferrochrome slag in a large scale and with high added value to realize environment reduction and enterprise synergy is a problem which needs to be solved urgently.
The carbon fiber cloth and the adhesive are mainly used for adhering the carbon fiber cloth to reinforce the concrete structure. The carbon fiber cloth has excellent high temperature resistance and no attenuation of physical and mechanical properties at the temperature of less than 1500 ℃ under the anaerobic condition. However, the currently used matching adhesive is epoxy organic adhesive with low softening point, the thermal stability and long-term chemical stability of the adhesive are poor, and particularly the upper temperature resistance limit of the adhesive is not more than 80 ℃. The temperature of the building fire can reach thousands of degrees centigrade, if the fire resistance of the carbon fiber cloth sticking reinforced structure is not paid enough attention, the carbon fiber cloth is easy to peel off from the concrete once a fire happens, and the reinforcing and reinforcing effects are difficult to be exerted. In view of the above problems, slag contains silicate and aluminosilicate, and steel slag and lateritic nickel slag contain a large amount of SiO2Can form an inorganic cementing material with CaO; the laterite-nickel slag and the ferrochromium slag contain a large amount of Al2O3Has flame retardant property with MgO. Therefore, the slag, the steel slag, the laterite-nickel slag and the ferrochrome slag are mixed and then compounded with the composite alkali activator, the graphene oxide and the water to form the composite alkali-activated solid waste type high-performance inorganic adhesive, the mechanical property, particularly the shearing force, of the inorganic adhesive is further improved by utilizing the composite alkali-activated technology and the graphene oxide, the recycling of solid waste resources is realized, and the synergy of enterprises is promoted.
Disclosure of Invention
The method aims to solve the problems that in the prior art, slag, steel slag, laterite-nickel slag and ferrochrome slag cannot be utilized in a large-scale and high-added-value manner, epoxy organic glue is poor in thermal stability, poor in long-term chemical stability, and poor in upper temperature resistance limit of less than 80 ℃, and the existing inorganic glue is insufficient in shearing force. The method utilizes the slag micro powder, the steel slag micro powder, the laterite-nickel ore slag ultra-fine powder, the ferrochrome slag ultra-fine powder, the composite alkali excitant, the graphene oxide and the water to prepare the composite alkali-excited solid waste type high-performance inorganic adhesive, and controls the stirring speed, the stirring time, the vacuum degree and the like so as to realize the large-scale high-added-value recycling of the slag, the steel slag, the laterite-nickel slag and the ferrochrome slag.
In order to solve the above technical problems, the present invention is realized by the following technical solutions.
The invention provides a composite alkali-activated solid waste type high-performance inorganic adhesive, which comprises the following raw materials in percentage by weight:
the slag micro powder is granulated blast furnace slag micro powder with the particle size of 25-45 mu m; the steel slag micro powder is one or more of hot stuffy slag micro powder, air quenching slag micro powder, molten iron desulphurization slag micro powder, casting residue micro powder, converter hot splashing slag micro powder, converter roller slag micro powder, electric furnace hot splashing slag micro powder and electric furnace roller slag micro powder, and the particle size of the steel slag micro powder is 25-45 mu m; the composite alkali activator is a mixture of sodium hydroxide and water glass, the mass ratio of the sodium hydroxide to the water glass is 3: 1-1: 3, the sodium hydroxide is industrial pure, the water glass is industrial pure, and the modulus of the water glass is 0.8-1.6; the graphene oxide is one or more of Brodie method graphene oxide, Staudemaier method graphene oxide and Hummers method graphene oxide; the water is deionized water.
Furthermore, the particle size of the laterite-nickel slag ultrafine powder is 0.5-2.5 μm.
Furthermore, the particle size of the ferrochromium slag ultrafine powder is 0.5-2.5 μm.
The invention also provides a preparation method of the composite alkali-activated solid waste type high-performance inorganic adhesive, which comprises the following steps:
(1) mixing the slag micro powder and the steel slag micro powder by using a constant-temperature magnetic stirrer at normal temperature, wherein the stirring speed is 200-500 r/min, and the stirring time is 2-5 h, so as to obtain the slag-steel slag mixed micro powder.
(2) Mixing the laterite-nickel slag superfine powder, the ferrochrome slag superfine powder and the slag-steel slag mixed micropowder by using a constant-temperature magnetic stirrer at the conditions of normal temperature and vacuum degree of 0.02MPa to 0.08MPa, wherein the stirring speed is 200r/min to 500r/min, and the stirring time is 3h to 6h, so as to obtain the mixed powder.
(3) And (2) mixing the composite alkali activator, the graphene oxide and water by using a constant-temperature magnetic stirrer at the normal temperature, wherein the stirring speed is 300-600 r/min, and the stirring time is 2-5 h, so as to obtain a mixed solution.
(4) And (3) mixing the mixed powder prepared in the step (2) with the mixed solution prepared in the step (3) by using a constant-temperature magnetic stirrer at normal temperature, wherein the stirring speed is 800-1600 r/min, and the stirring time is 10-30 min, so as to obtain the composite alkali-activated solid waste type high-performance inorganic adhesive.
The scientific principle of the invention is as follows:
(1) the slag contains silicate and aluminosilicate, and the steel slag and the laterite-nickel ore slag contain a large amount of SiO2Reacting with CaO, slag, steel slag, laterite-nickel slag and water to form inorganic materials with gelling property, such as tricalcium silicate, dicalcium silicate and the like; the laterite-nickel slag and the ferrochromium slag contain a large amount of Al2O3The melting point is 2054 ℃ and MgO (the melting point is 2852 ℃) have flame retardant property, and the high temperature resistance of the inorganic cementing material can be improved.
(2) The composite alkali activator consists of water glass and sodium hydroxide, and on one hand, the water glass can form a skeleton network and is filled or embedded in the inorganic cementing material, so that the mechanical property of the inorganic adhesive is improved; on the other hand, the water glass and the sodium hydroxide can provide an alkali environment, and are favorable for promoting inorganic materials with gelling performance, such as tricalcium silicate, dicalcium silicate and the like, to hydrate, so that the early strength of the inorganic adhesive is improved.
(3) The graphene oxide has a two-dimensional layered structure, and the surface of the graphene oxide bears various active oxygen-containing groups, so that on one hand, the graphene oxide can form a curled lamellar structure, and the impact resistance of the inorganic adhesive is improved; on the other hand, the conjugated structure of the graphene oxide sheet layer can generate van der Waals acting force, and the shearing force of the inorganic adhesive is improved.
(4) By utilizing a vacuum negative pressure technology, the laterite-nickel ore slag fine powder and the ferrochrome slag ultrafine powder are firmly adsorbed in the surface pore structure of the slag-steel slag mixed micropowder to form mixed powder with uniform dispersibility and stable structure.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention solves the problems that the prior art can not utilize slag, steel slag, laterite-nickel slag and ferrochrome slag in a large scale and with high added value, epoxy organic glue has poor thermal stability, poor long-term chemical stability and temperature resistance upper limit of less than 80 ℃, and the prior inorganic glue has insufficient shearing force. The solution of the problems not only reduces the production cost of the existing inorganic adhesive, but also improves the high temperature resistance and the shearing force of the inorganic adhesive, realizes the integration of the high temperature resistance and the high shearing force in the inorganic adhesive, and greatly enhances the market competitiveness and the application range of the inorganic adhesive.
2. According to the invention, the composite alkali-activated solid waste type high-performance inorganic adhesive is prepared from the slag micro-powder, the steel slag micro-powder, the laterite-nickel ore slag ultra-fine powder, the ferrochrome slag ultra-fine powder, the composite alkali-activated solid waste type high-performance inorganic adhesive, the graphene oxide and water, so that a new concept of large-scale and high-added-value application of the slag, the steel slag, the laterite-nickel slag and the ferrochrome slag is expanded.
3. The composite alkali-activated solid waste type high-performance inorganic adhesive and the preparation method thereof meet the policy requirements of relevant energy conservation, environmental protection and circular economy.
Detailed Description
The present invention will be described in detail with reference to specific examples, but the present invention is not limited to the examples.
Example 1
The components used for preparing 100g of the product of the invention and the mass ratio thereof are as follows:
the slag micro powder is granulated blast furnace slag micro powder with the particle size of 25-45 mu m; the steel slag micro powder is converter hot splashing slag micro powder, and the particle size of the steel slag micro powder is 25-45 mu m; the particle size of the laterite-nickel slag ultrafine powder is 0.5-2.5 μm; the grain size of the ferrochromium slag superfine powder is 0.5-2.5 mu m; the composite alkali activator is a mixture of sodium hydroxide and water glass, the mass ratio of the sodium hydroxide to the water glass is 3:1, the sodium hydroxide is industrial pure, the water glass is industrial pure, and the modulus of the water glass is 1.6; the graphene oxide is a mixture of Staudemaier method graphene oxide and Brodie method graphene oxide; the water is deionized water.
(1) And (3) mixing the slag micro powder and the steel slag micro powder by using a constant-temperature magnetic stirrer at normal temperature, wherein the stirring speed is 300r/min, and the stirring time is 4h, so as to obtain the slag-steel slag mixed micro powder.
(2) Mixing the laterite-nickel slag superfine powder, the ferrochromium slag superfine powder and the slag-steel slag mixed micropowder by using a constant-temperature magnetic stirrer at the conditions of normal temperature and vacuum degree of 0.08MPa, wherein the stirring speed is 400r/min, and the stirring time is 3h to obtain mixed powder.
(3) And (3) mixing the composite alkali activator, the graphene oxide and water by using a constant-temperature magnetic stirrer at normal temperature, wherein the stirring speed is 300r/min, and the stirring time is 3h to obtain a mixed solution.
(4) And (3) mixing the mixed powder prepared in the step (2) with the mixed solution prepared in the step (3) by using a constant-temperature magnetic stirrer at normal temperature, wherein the stirring speed is 1000r/min, and the stirring time is 30min, so that the composite alkali-activated solid waste type high-performance inorganic adhesive is obtained.
Example 2
The components used for preparing 100g of the product of the invention and the mass ratio thereof are as follows:
the slag micro powder is granulated blast furnace slag micro powder with the particle size of 25-45 mu m; the steel slag micro powder is electric furnace roller slag micro powder, and the particle size of the steel slag micro powder is 25-45 mu m; the particle size of the laterite-nickel slag ultrafine powder is 0.5-2.5 μm; the grain size of the ferrochromium slag superfine powder is 0.5-2.5 mu m; the composite alkali activator is a mixture of sodium hydroxide and water glass, the mass ratio of the sodium hydroxide to the water glass is 1:1, the sodium hydroxide is industrial pure, the water glass is industrial pure, and the modulus of the water glass is 1.0; the graphene oxide is graphene oxide by a Hummers method; the water is deionized water.
(1) And (3) mixing the slag micro powder and the steel slag micro powder by using a constant-temperature magnetic stirrer at normal temperature, wherein the stirring speed is 400r/min, and the stirring time is 2h, so as to obtain the slag-steel slag mixed micro powder.
(2) Mixing the laterite-nickel slag superfine powder, the ferrochromium slag superfine powder and the slag-steel slag mixed micropowder by using a constant-temperature magnetic stirrer at the conditions of normal temperature and 0.02MPa of vacuum degree, wherein the stirring speed is 500r/min, and the stirring time is 4h to obtain mixed powder.
(3) And (3) mixing the composite alkali activator, the graphene oxide and water by using a constant-temperature magnetic stirrer at normal temperature, wherein the stirring speed is 600r/min, and the stirring time is 5h to obtain a mixed solution.
(4) And (3) mixing the mixed powder prepared in the step (2) with the mixed solution prepared in the step (3) by using a constant-temperature magnetic stirrer at normal temperature, wherein the stirring speed is 1200r/min, and the stirring time is 10min, so that the composite alkali-activated solid waste type high-performance inorganic adhesive is obtained.
Example 3
The components used for preparing 100g of the product of the invention and the mass ratio thereof are as follows:
the slag micro powder is granulated blast furnace slag micro powder with the particle size of 25-45 mu m; the steel slag micro powder is a mixture of hot disintegrating slag micro powder and air quenching slag micro powder, and the particle size of the steel slag micro powder is 25-45 mu m; the particle size of the laterite-nickel slag ultrafine powder is 0.5-2.5 μm; the grain size of the ferrochromium slag superfine powder is 0.5-2.5 mu m; the composite alkali activator is a mixture of sodium hydroxide and water glass, the mass ratio of the sodium hydroxide to the water glass is 1:3, the sodium hydroxide is industrial pure, the water glass is industrial pure, and the modulus of the water glass is 0.8; the graphene oxide is a mixture of Brodie method graphene oxide and Hummers method graphene oxide; the water is deionized water.
(1) And (3) mixing the slag micro powder and the steel slag micro powder by using a constant-temperature magnetic stirrer at normal temperature, wherein the stirring speed is 200r/min, and the stirring time is 5h, so as to obtain the slag-steel slag mixed micro powder.
(2) Mixing the laterite-nickel slag superfine powder, the ferrochromium slag superfine powder and the slag-steel slag mixed micropowder by using a constant-temperature magnetic stirrer at the conditions of normal temperature and 0.06MPa of vacuum degree, wherein the stirring speed is 300r/min, and the stirring time is 5h to obtain mixed powder.
(3) And (3) mixing the composite alkali activator, the graphene oxide and water by using a constant-temperature magnetic stirrer at normal temperature, wherein the stirring speed is 500r/min, and the stirring time is 4h to obtain a mixed solution.
(4) And (3) mixing the mixed powder prepared in the step (2) with the mixed solution prepared in the step (3) by using a constant-temperature magnetic stirrer at normal temperature, wherein the stirring speed is 1600r/min, and the stirring time is 20min, so that the composite alkali-activated solid waste type high-performance inorganic adhesive is obtained.
Example 4
The components used for preparing 100g of the product of the invention and the mass ratio thereof are as follows:
the slag micro powder is granulated blast furnace slag micro powder with the particle size of 25-45 mu m; the steel slag micro powder is a mixture of molten iron desulphurization slag micro powder and casting residue micro powder, and the particle size of the steel slag micro powder is 25-45 mu m; the particle size of the laterite-nickel slag ultrafine powder is 0.5-2.5 μm; the grain size of the ferrochromium slag superfine powder is 0.5-2.5 mu m; the composite alkali activator is a mixture of sodium hydroxide and water glass, the mass ratio of the sodium hydroxide to the water glass is 2:1, the sodium hydroxide is industrial pure, the water glass is industrial pure, and the modulus of the water glass is 1.4; the graphene oxide is a mixture of graphene oxide by a Hummers method and graphene oxide by a Staudemaier method; the water is deionized water.
(1) And (3) mixing the slag micro powder and the steel slag micro powder by using a constant-temperature magnetic stirrer at normal temperature, wherein the stirring speed is 500r/min, and the stirring time is 3h, so as to obtain the slag-steel slag mixed micro powder.
(2) Mixing the laterite-nickel slag superfine powder, the ferrochromium slag superfine powder and the slag-steel slag mixed micropowder by using a constant-temperature magnetic stirrer at the conditions of normal temperature and vacuum degree of 0.04MPa, wherein the stirring speed is 200r/min, and the stirring time is 6h to obtain mixed powder.
(3) And (3) mixing the composite alkali activator, the graphene oxide and water by using a constant-temperature magnetic stirrer at normal temperature, wherein the stirring speed is 400r/min, and the stirring time is 2 hours, so as to obtain a mixed solution.
(4) And (3) mixing the mixed powder prepared in the step (2) with the mixed solution prepared in the step (3) by using a constant-temperature magnetic stirrer at normal temperature, wherein the stirring speed is 800r/min, and the stirring time is 15min, so that the composite alkali-activated solid waste type high-performance inorganic adhesive is obtained.
Example 5
The components used for preparing 100g of the product of the invention and the mass ratio thereof are as follows:
the slag micro powder is granulated blast furnace slag micro powder with the particle size of 25-45 mu m; the steel slag micro powder is converter roller slag micro powder, and the particle size of the steel slag micro powder is 25-45 mu m; the particle size of the laterite-nickel slag ultrafine powder is 0.5-2.5 μm; the grain size of the ferrochromium slag superfine powder is 0.5-2.5 mu m; the composite alkali activator is a mixture of sodium hydroxide and water glass, the mass ratio of the sodium hydroxide to the water glass is 1:2, the sodium hydroxide is industrial pure, the water glass is industrial pure, and the modulus of the water glass is 1.2; the graphene oxide is Brodie method graphene oxide; the water is deionized water.
(1) And (3) mixing the slag micro powder and the steel slag micro powder by using a constant-temperature magnetic stirrer at normal temperature, wherein the stirring speed is 300r/min, and the stirring time is 5h, so as to obtain the slag-steel slag mixed micro powder.
(2) Mixing the laterite-nickel slag superfine powder, the ferrochromium slag superfine powder and the slag-steel slag mixed micropowder by using a constant-temperature magnetic stirrer at the conditions of normal temperature and 0.02MPa of vacuum degree, wherein the stirring speed is 500r/min, and the stirring time is 4h to obtain mixed powder.
(3) And (3) mixing the composite alkali activator, the graphene oxide and water by using a constant-temperature magnetic stirrer at normal temperature, wherein the stirring speed is 400r/min, and the stirring time is 4h, so as to obtain a mixed solution.
(4) And (3) mixing the mixed powder prepared in the step (2) with the mixed solution prepared in the step (3) by using a constant-temperature magnetic stirrer at normal temperature, wherein the stirring speed is 1400r/min, and the stirring time is 25min, so that the composite alkali-activated solid waste type high-performance inorganic adhesive is obtained.
Example 6
The components used for preparing 100g of the product of the invention and the mass ratio thereof are as follows:
the slag micro powder is granulated blast furnace slag micro powder with the particle size of 25-45 mu m; the steel slag micro powder is hot splashing slag micro powder of an electric furnace, and the particle size of the steel slag micro powder is 25-45 mu m; the particle size of the laterite-nickel slag ultrafine powder is 0.5-2.5 μm; the grain size of the ferrochromium slag superfine powder is 0.5-2.5 mu m; the composite alkali activator is a mixture of sodium hydroxide and water glass, the mass ratio of the sodium hydroxide to the water glass is 1:1, the sodium hydroxide is industrial pure, the water glass is industrial pure, and the modulus of the water glass is 1.0; the graphene oxide is graphene oxide by a Staudemaier method; the water is deionized water.
(1) And (3) mixing the slag micro powder and the steel slag micro powder by using a constant-temperature magnetic stirrer at normal temperature, wherein the stirring speed is 400r/min, and the stirring time is 4h, so as to obtain the slag-steel slag mixed micro powder.
(2) Mixing the laterite-nickel slag superfine powder, the ferrochromium slag superfine powder and the slag-steel slag mixed micropowder by using a constant-temperature magnetic stirrer at the conditions of normal temperature and 0.06MPa of vacuum degree, wherein the stirring speed is 300r/min, and the stirring time is 4h to obtain mixed powder.
(3) And (3) mixing the composite alkali activator, the graphene oxide and water by using a constant-temperature magnetic stirrer at normal temperature, wherein the stirring speed is 500r/min, and the stirring time is 3h to obtain a mixed solution.
(4) And (3) mixing the mixed powder prepared in the step (2) with the mixed solution prepared in the step (3) by using a constant-temperature magnetic stirrer at normal temperature, wherein the stirring speed is 1200r/min, and the stirring time is 20min, so that the composite alkali-activated solid waste type high-performance inorganic adhesive is obtained.
Comparative example 1
The components used for preparing 100g of the product of the invention and the mass ratio thereof are as follows:
the slag micro powder is granulated blast furnace slag micro powder with the particle size of 25-45 mu m; the steel slag micro powder is hot splashing slag micro powder of an electric furnace, and the particle size of the steel slag micro powder is 25-45 mu m; the particle size of the laterite-nickel slag ultrafine powder is 0.5-2.5 μm; the grain size of the ferrochromium slag superfine powder is 0.5-2.5 mu m; the composite alkali activator is a mixture of sodium hydroxide and water glass, the mass ratio of the sodium hydroxide to the water glass is 1:1, the sodium hydroxide is industrial pure, the water glass is industrial pure, and the modulus of the water glass is 1.0; the water is deionized water.
(1) And (3) mixing the slag micro powder and the steel slag micro powder by using a constant-temperature magnetic stirrer at normal temperature, wherein the stirring speed is 400r/min, and the stirring time is 4h, so as to obtain the slag-steel slag mixed micro powder.
(2) Mixing the laterite-nickel slag superfine powder, the ferrochromium slag superfine powder and the slag-steel slag mixed micropowder by using a constant-temperature magnetic stirrer at the conditions of normal temperature and 0.06MPa of vacuum degree, wherein the stirring speed is 300r/min, and the stirring time is 4h to obtain mixed powder.
(3) And (3) mixing the compound alkali activator with water by using a constant-temperature magnetic stirrer at normal temperature, wherein the stirring speed is 500r/min, and the stirring time is 3h to obtain a mixed solution.
(4) And (3) mixing the mixed powder prepared in the step (2) with the mixed solution prepared in the step (3) by using a constant-temperature magnetic stirrer at normal temperature, wherein the stirring speed is 1200r/min, and the stirring time is 20min, so that the composite alkali-activated solid waste type high-performance inorganic adhesive is obtained.
Comparative example 2
The components used for preparing 100g of the product of the invention and the mass ratio thereof are as follows:
the slag micro powder is granulated blast furnace slag micro powder with the particle size of 25-45 mu m; the steel slag micro powder is hot splashing slag micro powder of an electric furnace, and the particle size of the steel slag micro powder is 25-45 mu m; the particle size of the laterite-nickel slag ultrafine powder is 0.5-2.5 μm; the composite alkali activator is a mixture of sodium hydroxide and water glass, the mass ratio of the sodium hydroxide to the water glass is 1:1, the sodium hydroxide is industrial pure, the water glass is industrial pure, and the modulus of the water glass is 1.0; the graphene oxide is graphene oxide by a Staudemaier method; the water is deionized water.
(1) And (3) mixing the slag micro powder and the steel slag micro powder by using a constant-temperature magnetic stirrer at normal temperature, wherein the stirring speed is 400r/min, and the stirring time is 4h, so as to obtain the slag-steel slag mixed micro powder.
(2) Mixing the laterite-nickel slag superfine powder and the slag-steel slag mixed micropowder by using a constant-temperature magnetic stirrer at the conditions of normal temperature and 0.06MPa of vacuum degree, wherein the stirring speed is 300r/min, and the stirring time is 4h to obtain mixed powder.
(3) And (3) mixing the composite alkali activator, the graphene oxide and water by using a constant-temperature magnetic stirrer at normal temperature, wherein the stirring speed is 500r/min, and the stirring time is 3h to obtain a mixed solution.
(4) And (3) mixing the mixed powder prepared in the step (2) with the mixed solution prepared in the step (3) by using a constant-temperature magnetic stirrer at normal temperature, wherein the stirring speed is 1200r/min, and the stirring time is 20min, so that the composite alkali-activated solid waste type high-performance inorganic adhesive is obtained.
Comparative example 3
The components used for preparing 100g of the product of the invention and the mass ratio thereof are as follows:
the slag micro powder is granulated blast furnace slag micro powder with the particle size of 25-45 mu m; the steel slag micro powder is hot splashing slag micro powder of an electric furnace, and the particle size of the steel slag micro powder is 25-45 mu m; the particle size of the laterite-nickel slag ultrafine powder is 0.5-2.5 μm; the grain size of the ferrochromium slag superfine powder is 0.5-2.5 mu m; the graphene oxide is graphene oxide by a Staudemaier method; the water is deionized water.
(1) And (3) mixing the slag micro powder and the steel slag micro powder by using a constant-temperature magnetic stirrer at normal temperature, wherein the stirring speed is 400r/min, and the stirring time is 4h, so as to obtain the slag-steel slag mixed micro powder.
(2) Mixing the laterite-nickel slag superfine powder, the ferrochromium slag superfine powder and the slag-steel slag mixed micropowder by using a constant-temperature magnetic stirrer at the conditions of normal temperature and 0.06MPa of vacuum degree, wherein the stirring speed is 300r/min, and the stirring time is 4h to obtain mixed powder.
(3) And mixing the graphene oxide with water by using a constant-temperature magnetic stirrer at a normal temperature, wherein the stirring speed is 500r/min, and the stirring time is 3 hours, so as to obtain a mixed solution.
(4) And (3) mixing the mixed powder prepared in the step (2) with the mixed solution prepared in the step (3) by using a constant-temperature magnetic stirrer at normal temperature, wherein the stirring speed is 1200r/min, and the stirring time is 20min, so that the composite alkali-activated solid waste type high-performance inorganic adhesive is obtained.
The performance test procedures of the preparation examples 1-6 and the comparative examples 1-3 are as follows:
firstly, the concrete test block is prepared with the size of 100mm multiplied by 100mm, the design strength grade is C40, and the mean value of the measured 28d compressive strength of 3 test pieces is 48.7 MPa. And then adhering 1 layer of carbon fiber cloth on the surface of the concrete test block by using composite alkali-activated solid waste type high-performance inorganic adhesive, wherein the adhering area is 70mm multiplied by 100 mm. And finally, the concrete test block adhered with the carbon fiber cloth is taken out after being respectively cured for 3d and 7d in a standard curing room, and the shearing strength of the adhered surface of the concrete test block is tested.
Firstly, preparing a composite alkali-activated solid waste type high-performance inorganic adhesive test block with the size of 20mm multiplied by 20mm, curing for 28 days in a standard curing room, and drying by an electric heating constant-temperature drying oven. And then calcining the compound alkali-activated solid waste type high-performance inorganic adhesive test block at different calcining temperatures, namely 900 ℃, 1200 ℃ and 1500 ℃ for 2 hours at constant temperature, naturally cooling to room temperature, and testing the compressive strength of the test block after high-temperature cooling.
TABLE 1 Properties of composite alkali-activated solid waste type high-Performance inorganic adhesive
Claims (1)
1. The composite alkali-activated solid waste type high-performance inorganic adhesive is characterized by comprising the following raw materials in percentage by weight:
15 to 25 percent of slag micro powder
15 to 25 percent of steel slag micro powder
10 to 20 percent of laterite-nickel ore slag ultrafine powder
10 to 20 percent of ferrochromium slag superfine powder
3 to 7 percent of compound alkali activator
0.1 to 0.5 percent of graphene oxide
20 to 35 percent of water
The slag micro powder is granulated blast furnace slag micro powder, and the particle size of the slag micro powder is 25-45 mu m; the steel slag micro powder is one or more of hot disintegrating slag micro powder, air quenching slag micro powder, molten iron desulphurization slag micro powder, casting residue micro powder, converter hot splashing slag micro powder, converter roller slag micro powder, electric furnace hot splashing slag micro powder and electric furnace roller slag micro powder, and the particle size of the steel slag micro powder is 25-45 mu m; the composite alkali activator is a mixture of sodium hydroxide and water glass, the mass ratio of the sodium hydroxide to the water glass is 3: 1-1: 3, the sodium hydroxide is industrial pure, the water glass is industrial pure, and the modulus of the water glass is 0.8-1.6; the graphene oxide is one or more of Brodie method graphene oxide, Staudemaier method graphene oxide and Hummers method graphene oxide; the water is deionized water;
the particle size of the laterite nickel slag ultrafine powder is 0.5-2.5 mu m;
the particle size of the ferrochromium slag ultrafine powder is 0.5-2.5 mu m;
the preparation method of the composite alkali-activated solid waste type high-performance inorganic adhesive comprises the following steps:
(1) mixing the slag micro powder and the steel slag micro powder by using a constant-temperature magnetic stirrer at normal temperature, wherein the stirring speed is 200-500 r/min, and the stirring time is 2-5 h, so as to obtain slag-steel slag mixed micro powder;
(2) mixing the laterite-nickel slag superfine powder, the ferrochrome slag superfine powder and the slag-steel slag mixed micropowder by using a constant-temperature magnetic stirrer at the conditions of normal temperature and vacuum degree of 0.02MPa to 0.08MPa, wherein the stirring speed is 200r/min to 500r/min, and the stirring time is 3h to 6h, so as to obtain mixed powder;
(3) mixing the composite alkali activator, the graphene oxide and water by using a constant-temperature magnetic stirrer at normal temperature, wherein the stirring speed is 300-600 r/min, and the stirring time is 2-5 h, so as to obtain a mixed solution;
(4) and (3) mixing the mixed powder prepared in the step (2) with the mixed solution prepared in the step (3) by using a constant-temperature magnetic stirrer at normal temperature, wherein the stirring speed is 800-1600 r/min, and the stirring time is 10-30 min, so as to obtain the composite alkali-activated solid waste type high-performance inorganic adhesive.
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| CN109293991A (en) * | 2018-10-15 | 2019-02-01 | 安徽工业大学 | A kind of lateritic nickel ore slag with fire-retardant reinforcing property-ferrochrome slag compounded rubber filler |
| CN109694207A (en) * | 2019-01-25 | 2019-04-30 | 北京新时代寰宇科技发展有限公司 | A kind of full solid waste cementitious material, its thermal insulation material and processing method and application |
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| CN109293991A (en) * | 2018-10-15 | 2019-02-01 | 安徽工业大学 | A kind of lateritic nickel ore slag with fire-retardant reinforcing property-ferrochrome slag compounded rubber filler |
| CN109694207A (en) * | 2019-01-25 | 2019-04-30 | 北京新时代寰宇科技发展有限公司 | A kind of full solid waste cementitious material, its thermal insulation material and processing method and application |
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