CN115521109A - Green environment-friendly concrete suitable for fabricated light wall board and preparation method thereof - Google Patents
Green environment-friendly concrete suitable for fabricated light wall board and preparation method thereof Download PDFInfo
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- CN115521109A CN115521109A CN202211184769.4A CN202211184769A CN115521109A CN 115521109 A CN115521109 A CN 115521109A CN 202211184769 A CN202211184769 A CN 202211184769A CN 115521109 A CN115521109 A CN 115521109A
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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
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/02—Granular materials, e.g. microballoons
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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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/12—Waste materials; Refuse from quarries, mining or the like
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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
- C04B20/10—Coating or impregnating
- C04B20/1018—Coating or impregnating with organic materials
- C04B20/1029—Macromolecular compounds
- C04B20/1033—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/12—Esters of monohydric alcohols or phenols
- C08F220/14—Methyl esters, e.g. methyl (meth)acrylate
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials
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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
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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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Abstract
The invention discloses green environment-friendly concrete suitable for an assembled light wallboard, which comprises the following raw material substances: portland cement, broken stone, stone chips, water, fly ash and a polycarboxylic acid water reducing agent; the surface of the stone chip is coated with an acrylate polymerization layer, and the polymerization raw material of the acrylate polymerization layer comprises 75-80 parts by weight of main polymerAnd 20-35 parts by weight of a functional polymerized monomer selected from compounds represented by the structural formula 1:
Description
Technical Field
The invention relates to the technical field of building materials, in particular to green environment-friendly concrete suitable for an assembled light wallboard and a preparation method thereof.
Background
For a long time, the building sand in China is mainly river sand, and along with the acceleration of the urbanization process and the vigorous development of infrastructure construction in recent years, the requirement of the building sand is increased increasingly due to the large use of concrete and mortar. However, due to the limitation of resources, the river sand yield is difficult to meet the use requirement, the supply of river sand on the market is increasingly tense, and the quality of sand is also reduced year by year. The natural river sand belongs to non-renewable resources, and the supply in the future is less and less, so that other materials are necessary to replace the river sand.
In the aspect of river sand substitute materials, a great deal of research is carried out at home and abroad, and at present, three approaches are mainly provided. Firstly, sea sand is adopted; secondly, artificial sand is adopted, namely rock is adopted for making sand; thirdly, stone chips are adopted. The stone chippings are the by-products screened out in the process of producing the stone chippings, and about 20 to 30 tons of stone chippings are produced for each 100 tons of stone chippings processed. It is used as the waste of stone yard, and is used for road filling and has low cost.
The stone chips are used for replacing river sand in concrete, so that the concrete has higher economic and social values. The river sand mainly comprises silicon dioxide and has low water absorption, while the existing stone chips mainly comprise limestone and have high water absorption, and the existing stone chip full-generation sand concrete cannot meet the requirement on the water impermeability in fields with high requirement on the concrete impermeability, such as the field of waterproof fabricated light wall boards.
Disclosure of Invention
The invention discloses green environment-friendly concrete suitable for fabricated lightweight wallboards and a preparation method thereof, aiming at the problems of no environment-friendly material and insufficient impermeability of the existing concrete.
The invention discloses green environment-friendly concrete suitable for an assembled light wallboard, which comprises the following raw material substances: portland cement, broken stone, stone chips, water, fly ash and a polycarboxylic acid water reducing agent;
the surface of the stone chips is coated with an acrylate polymerization layer, polymerization raw materials of the acrylate polymerization layer comprise 75-80 parts by weight of main polymerization monomers and 20-35 parts by weight of functional polymerization monomers, and the functional polymerization monomers are selected from compounds shown in a structural formula 1:
further, the feed comprises the following raw materials in parts by weight:
168-232 parts of portland cement, 980-1121 parts of broken stone, 650-800 parts of stone chips, 143-166 parts of water, 21-32 parts of fly ash, 152-168 parts of mineral powder and 6.84-8.40 parts of polycarboxylic acid water reducing agent.
Further, the thickness of the acrylate polymerization layer is 12-100nm.
Further, the bulk polymerization monomer comprises one or more of methyl methacrylate, styrene, methyl styrene, butyl acrylate, butyl methacrylate, isobutyl acrylate, tert-butyl acrylate, isooctyl acrylate, isodecyl acrylate, dodecyl methacrylate, acrylic acid, methacrylic acid, acrylamide, acetoacetoxy ethyl methacrylate, glycidyl acrylate, hexadecyl acrylate and octadecyl acrylate.
Further, the Portland cement is P.II 42.5R cement.
Furthermore, the gravel is granite, and the particle diameter of the gravel is 5-25mm.
Furthermore, the fineness modulus of the stone chips is 3.0-3.7, the mass content of the particles with the particle size of less than 0.16mm in the stone chips is 8-28%, and the mass content of the particles with the particle size of less than 0.08mm is less than 7%.
Furthermore, the gravel is granite, and the particle diameter of the gravel is 5-25mm.
The invention also discloses a preparation method of the green environment-friendly concrete suitable for the fabricated light wallboard, which comprises the following steps:
mixing water and an emulsifier;
heating to 85 ℃, adding a monomer mixture and an initiator to initiate polymerization, wherein the monomer mixture comprises 75-80 parts by weight of main polymerization monomers and 20-35 parts by weight of functional polymerization monomers, and the functional polymerization monomers are selected from compounds shown in a structural formula 1:
adding a neutralizing agent to adjust the pH value to obtain an acrylate copolymer emulsion;
diluting the acrylate copolymer emulsion with water to a solid content of 1-10%, adding the stone chips into the acrylate copolymer emulsion, mixing and stirring, filtering, and drying to obtain the stone chips coated with the acrylate polymer layer;
pre-mixing 50% of crushed stone, stone chips, fly ash, 50% of Portland cement and 50% of water to obtain a pre-mixed material;
and then adding a polycarboxylic acid water reducing agent, the rest 50% of crushed stone, 50% of Portland cement and 50% of water into the premixed material, stirring again to prepare green environment-friendly concrete, pouring and curing the green environment-friendly concrete, and curing for more than 15 days.
Further, the bulk polymerized monomer comprises one or more of methyl methacrylate, styrene, methyl styrene, butyl acrylate, butyl methacrylate, isobutyl acrylate, tert-butyl acrylate, isooctyl acrylate, isodecyl acrylate, dodecyl methacrylate, acrylic acid, methacrylic acid, acrylamide, acetoacetoxy ethyl methacrylate, glycidyl acrylate, hexadecyl acrylate and octadecyl acrylate.
Compared with the existing concrete, the invention adopts stone chips to replace river sand which is a common material in raw material substances, can avoid the problem of environmental damage caused by river sand production, has better energy-saving and environment-friendly properties, and simultaneously, in order to improve the impermeability of the concrete, the surface of the stone chips is coated with an acrylate polymerization layer, and a fluorine-containing compound shown in the structural formula 1 is added into the acrylate polymerization layer, so that the concrete has certain water permeability resistance, and the integral impermeability of the environment-friendly concrete is improved.
Detailed Description
The invention discloses green environment-friendly concrete suitable for an assembled light wallboard and a preparation method thereof.
The technical solutions of the present invention will be described clearly and completely below, and it is obvious that the description is only a part of the embodiments of the present invention, not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention discloses green environment-friendly concrete suitable for an assembled light wallboard, which comprises the following raw material substances: portland cement, broken stone, stone chips, water, fly ash and a polycarboxylic acid water reducing agent;
the surface of the stone chip is coated with an acrylate polymerization layer, polymerization raw materials of the acrylate polymerization layer comprise 75-80 parts by weight of main polymerization monomers and 20-35 parts by weight of functional polymerization monomers, and the functional polymerization monomers are selected from compounds shown in a structural formula 1:
the stone chips are adopted to replace river sand which is a common material in raw material substances, the problem of environmental damage caused by river sand production can be avoided, the energy-saving environment-friendly performance is better, meanwhile, in order to improve the impermeability of concrete, an acrylate polymerization layer is coated on the surfaces of the stone chips, and a fluorine-containing compound shown in a structural formula 1 is added into the acrylate polymerization layer, so that the concrete has certain water-resistant permeability, and the overall impermeability of the environment-friendly concrete suitable for the assembled light wallboard is improved.
In the concrete, the silicate cement has a gelling effect, the silicate cement and water form cement paste, and the cement paste wraps the surface of the aggregate and fills gaps of the aggregate. Before hardening, the cement slurry plays a role in lubrication, so that the mixture is endowed with certain workability, and construction is facilitated. After hardening, the portland cement reacts with water to form firm cement stones, and the aggregate particles are firmly bonded into a whole, so that the concrete has certain physical and mechanical properties.
The stone chips and the broken stones have the function of a framework, have the functions of cohesion and water retention on concrete mixtures, and prevent segregation and serious bleeding. The stone chips are filled in the gaps of the broken stones, and the silicate cement is filled in the gaps of the stone chips to form compact accumulation; the concrete saturated slurry is ensured, so that the apparent effect of plain concrete clear water is achieved.
The fly ash has multiple functions as a concrete admixture. The invention improves the proportion of the admixture in the concrete, the weight ratio of the admixture in the whole concrete is up to 8% or more, the fly ash used as the admixture can improve the workability of the concrete, inhibit bleeding, improve the later strength of the concrete, reduce the hydration heat of the concrete, inhibit the reaction of alkali aggregate and the like, and most importantly, as the environment applied by the concrete of the invention is a complex acid-base corrosion environment, under which the concrete structure is corroded by acidity and alkalinity, and after the fly ash with high proportion is added, the compactness of the concrete is improved and the interface structure is improved due to the secondary hydration reaction of the fly ash. Meanwhile, due to secondary hydration reaction, ca (OH) which is easy to be corroded by acid and alkali in concrete 2 The content of (2) is reduced, so that the acid resistance and alkaline corrosion resistance of the concrete can be improved. Therefore, the blending of the fly ash with high proportion by weight can not only improve the impermeability of the concrete, but also improve the acid resistance and alkaline corrosion resistance of the concrete, so that the concrete can be used in the environment with strong acid-base corrosion.
The polycarboxylate superplasticizer is grafted and copolymerized with different functional groups such as carboxyl, ester, sulfonic acid and the like in a molecular structure, so that the polycarboxylate superplasticizer has a certain initial water reducing effect, and the ester functional group grafted and copolymerized in the polycarboxylate superplasticizer is subjected to hydrolysis reaction in an alkaline cement environment to gradually generate carboxyl water reducing groups, thereby gradually releasing effective water reducing components.
In some embodiments, the following raw material materials by weight are included:
168-232 parts of portland cement, 980-1121 parts of broken stone, 650-800 parts of stone chips, 143-166 parts of water, 21-32 parts of fly ash, 152-168 parts of mineral powder and 6.84-8.40 parts of polycarboxylic acid water reducing agent.
In some embodiments, the acrylate polymeric layer has a thickness of 12-100nm.
In some embodiments, the bulk polymerized monomers include one or more of methyl methacrylate, styrene, methyl styrene, butyl acrylate, butyl methacrylate, isobutyl acrylate, t-butyl acrylate, isooctyl acrylate, isodecyl acrylate, dodecyl methacrylate, acrylic acid, methacrylic acid, acrylamide, acetoacetoxy ethyl methacrylate, glycidyl acrylate, hexadecyl acrylate, octadecyl acrylate.
In some embodiments, the portland cement is piii 42.5R cement.
The P.II 42.5R cement variety is selected, and the P.O42.5R cement is not selected, so that the workability and the strength of the concrete are improved, the strength guarantee is provided for the concrete, the service life of the concrete is prolonged, and the design requirement on the durability is met.
In some embodiments, the crushed stone is granite and the particle diameter of the crushed stone is 5-25mm.
In some embodiments, the stone chips have a fineness modulus of 3.0-3.7, and the mass content of particles with a particle size of less than 0.16mm in the stone chips is 8% -28%, and the mass content of particles with a particle size of less than 0.08mm is less than 7%.
In some embodiments, the crushed stone is granite and the particle diameter of the crushed stone is 5-25mm.
The invention also discloses a preparation method of the green environment-friendly concrete suitable for the fabricated lightweight wallboard, which comprises the following steps:
mixing water and an emulsifier;
heating to 85 ℃, adding a monomer mixture and an initiator to initiate polymerization, wherein the monomer mixture comprises 75-80 parts by weight of main polymerization monomers and 20-35 parts by weight of functional polymerization monomers, and the functional polymerization monomers are selected from compounds shown in a structural formula 1:
adding a neutralizing agent to adjust the pH value to obtain an acrylate copolymer emulsion;
diluting the acrylate copolymer emulsion with water to obtain 1-10% solid content, adding the stone chips into the acrylate copolymer emulsion, mixing, stirring, filtering, and drying to obtain the stone chips coated with an acrylate polymerization layer;
pre-mixing 50% of crushed stone, stone chips, fly ash, 50% of Portland cement and 50% of water to obtain a pre-mixed material;
and then adding a polycarboxylic acid water reducing agent, the rest 50% of crushed stone, 50% of Portland cement and 50% of water into the premixed material, stirring again to prepare green environment-friendly concrete, pouring and curing the green environment-friendly concrete, and curing for more than 15 days.
In some embodiments, the bulk polymerized monomers include one or more of methyl methacrylate, styrene, methyl styrene, butyl acrylate, butyl methacrylate, isobutyl acrylate, t-butyl acrylate, isooctyl acrylate, isodecyl acrylate, dodecyl methacrylate, acrylic acid, methacrylic acid, acrylamide, acetoacetoxy ethyl methacrylate, glycidyl acrylate, hexadecyl acrylate, octadecyl acrylate.
The invention is illustrated by the following specific examples:
example 1:
carrying out emulsion polymerization on 78 parts by weight of methyl methacrylate and 22 parts by weight of a compound shown in a structural formula 1 to obtain an acrylate copolymer emulsion, diluting to reduce the solid content to 3%, adding the stone chips into the acrylate copolymer emulsion, mixing and stirring, filtering, and drying to obtain the stone chips coated with an acrylate polymer layer.
Firstly, 509kg of crushed stone with the dosage of 50 percent, 742kg of stone chips, 26kg of fly ash, 112kg of Portland cement with the dosage of 50 percent and 81kg of water with the dosage of 50 percent are premixed, and premixed for 5min to obtain premixed materials; then adding 7.12kg of an additive high-performance polycarboxylic acid water reducing agent, 509kg of the rest 50% of crushed stone, 112kg of 50% of Portland cement and 81kg of 50% of water into the premixed material, and stirring for 3min to prepare the green environment-friendly concrete suitable for the fabricated light wallboard.
The ash fineness of the fly ash is 14-25, namely the fineness is that the residue of a 0.045mm square-hole sieve is less than or equal to 20 percent, the water content is less than or equal to 1 percent, the chloride ion content is less than or equal to 0.01 percent, and the soluble alkali content is less than or equal to 0.3 percent;
the polycarboxylate superplasticizer is a high-performance polycarboxylate superplasticizer of Lomei company.
And (3) injecting the obtained green environment-friendly concrete into an experimental mould, demoulding after 24 hours, and curing for 28 days.
Comparative example 1:
carrying out emulsion polymerization by adopting 100 parts by weight of methyl methacrylate to obtain acrylate copolymer emulsion, diluting to reduce the solid content to 3%, adding the stone chips into the acrylate copolymer emulsion, mixing and stirring, filtering, and drying to obtain the stone chips coated with the acrylate polymer layer.
Firstly, 509kg of crushed stone with the dosage of 50 percent, 742kg of stone chips, 26kg of fly ash, 112kg of Portland cement with the dosage of 50 percent and 81kg of water with the dosage of 50 percent are premixed, and premixed for 5min to obtain premixed materials; then adding 7.12kg of an additive high-performance polycarboxylic acid water reducing agent, 509kg of the rest 50% of crushed stone, 112kg of 50% of Portland cement and 81kg of 50% of water into the premixed material, and stirring for 3min to prepare the green environment-friendly concrete suitable for the fabricated light wallboard.
The ash fineness of the fly ash is 14-25, namely the fineness is that the residue of a 0.045mm square-hole sieve is less than or equal to 20 percent, the water content is less than or equal to 1 percent, the chloride ion content is less than or equal to 0.01 percent, and the soluble alkali content is less than or equal to 0.3 percent;
the polycarboxylate superplasticizer is a high-performance polycarboxylate superplasticizer manufactured by Lomei company.
And injecting the obtained green environment-friendly concrete into an experimental mould, demoulding after 24 hours, and maintaining for 28 days.
Comparative example 2:
firstly, 509kg of 50 percent of used gravel, 742kg of stone chips, 26kg of fly ash, 112kg of 50 percent of used portland cement and 81kg of 50 percent of used water are premixed for 5min to obtain premixed material; then adding 7.12kg of an additive high-performance polycarboxylic acid water reducing agent, 509kg of the rest 50% of broken stone, 112kg of 50% of Portland cement and 81kg of water with the 50% of water into the premixed material, and stirring for 3min to prepare the green environment-friendly concrete suitable for the fabricated light wallboard.
The ash fineness of the fly ash is 14-25, the fineness is that the residue on a 0.045mm square hole sieve is less than or equal to 20 percent, the water content is less than or equal to 1 percent, the chloride ion content is less than or equal to 0.01 percent, and the soluble alkali content is less than or equal to 0.3 percent;
the polycarboxylate superplasticizer is a high-performance polycarboxylate superplasticizer of Lomei company.
And (3) injecting the obtained green environment-friendly concrete into an experimental mould, demoulding after 24 hours, and curing for 28 days.
Sample detection
The green environment-friendly concrete materials prepared in the examples and the comparative examples are subjected to measurement of compressive strength and impermeability grade (the impermeability grade is determined according to GB 50164 concrete quality control Standard), and the specific measurement results are shown in the following table:
as can be seen from the above table, the concrete prepared by the invention has good anti-permeability and also has excellent compressive strength, and can be used in application environments with large water pressure.
The foregoing is a further detailed description of the invention in connection with specific preferred embodiments and it is not intended to limit the invention to the specific embodiments described. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (10)
1. The green environment-friendly concrete suitable for the fabricated light wallboard is characterized by comprising the following raw materials: portland cement, broken stone, stone chips, water, fly ash and a polycarboxylic acid water reducing agent;
the surface of the stone chip is coated with an acrylate polymerization layer, polymerization raw materials of the acrylate polymerization layer comprise 75-80 parts by weight of main polymerization monomers and 20-35 parts by weight of functional polymerization monomers, and the functional polymerization monomers are selected from compounds shown in a structural formula 1:
2. the green environmental-friendly concrete suitable for the fabricated lightweight wallboard according to claim 1, comprising the following raw material substances in parts by weight:
168-232 parts of portland cement, 980-1121 parts of broken stone, 650-800 parts of stone chips, 143-166 parts of water, 21-32 parts of fly ash, 152-168 parts of mineral powder and 6.84-8.40 parts of polycarboxylic acid water reducing agent.
3. The green environmental protection concrete suitable for fabricated lightweight wall boards according to claim 1, wherein the thickness of the acrylate polymer layer is 12-100nm.
4. The green, environmentally friendly concrete suitable for fabricated lightweight wallboard according to claim 1, wherein the bulk polymeric monomer comprises one or more of methyl methacrylate, styrene, methyl styrene, butyl acrylate, butyl methacrylate, isobutyl acrylate, t-butyl acrylate, isooctyl acrylate, isodecyl acrylate, dodecyl methacrylate, acrylic acid, methacrylic acid, acrylamide, acetoacetoxy ethyl methacrylate, glycidyl acrylate, hexadecyl acrylate, and octadecyl acrylate.
5. The green environmental protection concrete suitable for the fabricated lightweight wall panel according to claim 1, wherein the portland cement is pii 42.5R cement.
6. The green environmental-friendly concrete suitable for the fabricated lightweight wall panels according to claim 1, wherein the crushed stone is granite, and the particle diameter of the crushed stone is 5-25mm.
7. The green and environment-friendly concrete suitable for fabricated lightweight wallboards as claimed in claim 1, wherein the fineness modulus of the stone chips is 3.0-3.7, the mass content of particles with a particle size of less than 0.16mm in the stone chips is 8% -28%, and the mass content of particles with a particle size of less than 0.08mm is less than 7%.
8. The green environmental-friendly concrete suitable for the fabricated lightweight wall panels according to claim 1, wherein the crushed stone is granite, and the particle diameter of the crushed stone is 5-25mm.
9. The method for preparing green environmental protection concrete suitable for prefabricated lightweight wall panels according to any one of claims 1 to 8, comprising the steps of:
mixing water and an emulsifier;
heating to 85 ℃, adding a monomer mixture and an initiator to initiate polymerization, wherein the monomer mixture comprises 75-80 parts by weight of main polymerization monomer and 20-35 parts by weight of functional polymerization monomer, and the functional polymerization monomer is selected from a compound shown in a structural formula 1:
adding a neutralizing agent to adjust the pH value to obtain an acrylate copolymer emulsion;
diluting the acrylate copolymer emulsion with water to a solid content of 1-10%, adding the stone chips into the acrylate copolymer emulsion, mixing and stirring, filtering, and drying to obtain the stone chips coated with the acrylate polymer layer;
pre-mixing 50% of crushed stone, stone chips, fly ash, 50% of Portland cement and 50% of water to obtain a pre-mixed material;
and then adding a polycarboxylic acid water reducing agent, the rest 50% of crushed stone, 50% of Portland cement and 50% of water into the premixed material, stirring again to prepare green environment-friendly concrete, pouring and curing the green environment-friendly concrete, and curing for more than 15 days.
10. The method of claim 9, wherein the bulk polymer monomer comprises one or more of methyl methacrylate, styrene, methyl styrene, butyl acrylate, butyl methacrylate, isobutyl acrylate, tert-butyl acrylate, isooctyl acrylate, isodecyl acrylate, dodecyl methacrylate, acrylic acid, methacrylic acid, acrylamide, acetoacetoxy ethyl methacrylate, glycidyl acrylate, hexadecyl acrylate, and octadecyl acrylate.
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| CN1613883A (en) * | 2004-09-17 | 2005-05-11 | 浙江大学 | Preparation of water dispersed fine emulsion of fluorine acrelate copolymer for anti-oil and anti-water agent |
| CN107382185A (en) * | 2017-06-30 | 2017-11-24 | 中国铁建港航局集团有限公司 | A kind of C50 high performance concretes prepared with high content stone powder aggregate chips |
| CN112830740A (en) * | 2021-01-22 | 2021-05-25 | 广州市粤砼混凝土有限公司 | Fair-faced concrete produced from construction waste recycled aggregate |
-
2022
- 2022-09-27 CN CN202211184769.4A patent/CN115521109A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1613883A (en) * | 2004-09-17 | 2005-05-11 | 浙江大学 | Preparation of water dispersed fine emulsion of fluorine acrelate copolymer for anti-oil and anti-water agent |
| CN107382185A (en) * | 2017-06-30 | 2017-11-24 | 中国铁建港航局集团有限公司 | A kind of C50 high performance concretes prepared with high content stone powder aggregate chips |
| CN112830740A (en) * | 2021-01-22 | 2021-05-25 | 广州市粤砼混凝土有限公司 | Fair-faced concrete produced from construction waste recycled aggregate |
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