CN113526939B - Multifunctional building material and preparation method thereof - Google Patents

Multifunctional building material and preparation method thereof Download PDF

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Publication number
CN113526939B
CN113526939B CN202110589340.2A CN202110589340A CN113526939B CN 113526939 B CN113526939 B CN 113526939B CN 202110589340 A CN202110589340 A CN 202110589340A CN 113526939 B CN113526939 B CN 113526939B
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building material
styrene
butadiene
portland cement
powder
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CN113526939A (en
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徐熙君
徐嘉鹏
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Shenzhen Tianshi Technology Co ltd
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Shenzhen Tianshi Technology Co ltd
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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
    • C04B28/14—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 calcium sulfate cements
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
    • C04B28/04—Portland cements
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • 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
    • C04B28/06—Aluminous cements
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
    • C04B38/08—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by adding porous substances
    • 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
    • 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
    • C04B2111/40—Porous or lightweight materials

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

The invention relates to the technical field of building materials, in particular to a multifunctional building material and a preparation method thereof. A multifunctional building material comprises, by mass, 10-50% of an inorganic gel material, 20-60% of a light porous material, 1-10% of inorganic powder, 1-5% of an olefin polymer, 3-10% of an ethylene-vinyl acetate copolymer, 5-35% of a high-molecular adhesive, and 0.1-1.5% of a release agent. The multifunctional building material prepared by the invention has good heat resistance and mechanical strength at high temperature, further reduces the weight of unit volume while not influencing the mechanical strength of the building material, has good waterproof performance and heat-insulating performance, and is an energy-saving, low-carbon and environment-friendly multifunctional building material.

Description

Multifunctional building material and preparation method thereof
Technical Field
The invention relates to the technical field of building materials, in particular to a multifunctional building material and a preparation method thereof.
Background
With the development of economy and society and the improvement of the living standard of people, the requirement of people on the comfort level of the living environment is higher and higher, and in order to ensure that a house has good effects of being warm in winter and cool in summer, special building materials such as heat insulation bricks are often used when the building is built. However, the common insulating bricks on the market at present have the problems of poor waterproof effect and low mechanical strength, so that the insulating bricks are limited in the using process.
The heat insulation brick achieves the heat insulation effect by blocking solar heat radiation, so that the surface temperature of the heat insulation brick exposed to the sun for a long time can be obviously increased in a long time, particularly in summer, and cracks can be generated on the heat insulation brick due to long-time high-temperature baking.
The applicant discloses a waterproof, sun-proof and heat-insulating building material protective brick and a preparation method thereof in a Chinese patent CN111072338A, the prepared building material protective brick has certain waterproof effect and mechanical strength, but the protective brick disclosed in the Chinese patent CN111072338A has certain problems, and the applicant provides a multifunctional building material in the subsequent research and development process, and the multifunctional building material has good heat resistance and mechanical strength.
Disclosure of Invention
The invention provides a multifunctional building material, which comprises, by mass, 10-50% of an inorganic gel material, 20-60% of a light porous material, 1-10% of inorganic powder, 1-5% of an olefin polymer, 3-10% of an ethylene-vinyl acetate copolymer, 12-25% of an acrylic acid polymerization emulsion, 5-12% of a polyurethane emulsion, and 0.1-1.5% of a release agent.
Preferably, the inorganic gel material is at least one selected from calcium sulfate, calcium oxide, silicate substances, aluminate substances and sulphoaluminate substances.
Preferably, the lightweight porous material is selected from at least one of ceramsite, glass wool, glass microsphere, diatomite and asbestos.
Preferably, the inorganic powder is selected from the group consisting of a layered silicate powder and a carbonate powder.
Preferably, the phyllosilicate powder is at least one selected from the group consisting of kaolin, montmorillonite, talc, muscovite, wollastonite, and bentonite.
Preferably, the weight ratio of the inorganic powder to the olefin copolymer is (1-2): 1.
preferably, the polymerized monomer in the olefin polymer is at least one selected from ethylene, propylene, butylene, butadiene, styrene and isoprene.
Preferably, the olefin polymer is at least one selected from the group consisting of a styrene-butadiene-styrene block copolymer, a propylene-butadiene copolymer, a butadiene-isoprene-butadiene block copolymer, a styrene-isoprene-styrene block copolymer, and a styrene-ethylene-propylene-styrene block copolymer.
Preferably, the olefin polymer is a styrene-butadiene-styrene block copolymer; the mass ratio of styrene to butadiene in the styrene-butadiene-styrene block copolymer is 1: (2-4).
The second aspect of the invention provides a preparation method of a building material, which at least comprises the following steps:
(1) adding inorganic gel material, light porous material, inorganic powder, olefin polymer, ethylene-vinyl acetate copolymer, acrylic acid polymerization emulsion and polyurethane emulsion into a stirring container, and uniformly mixing;
(2) injecting the mixture obtained in the step (1) into a mold coated with a release agent, and performing pressure molding;
(3) and drying the module obtained after the pressure forming, and demolding to obtain the building material.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides a multifunctional building material prepared from an inorganic gel material, a light porous material, inorganic powder, acrylic emulsion, polyurethane emulsion, an ethylene-vinyl acetate copolymer, olefin polymer and a release agent.
The building material prepared by the invention has simple preparation process, the cost performance of the used material is high, and the building material is an energy-saving, low-carbon and environment-friendly multifunctional building material and meets the requirements of low carbon, energy saving and environment protection advocated by China.
The building material prepared by the invention also has good waterproof performance and heat-insulating performance. The building material prepared by the invention is used as the top of a building, can increase the indoor comfort, and is warm in winter and cool in summer.
Detailed Description
The invention provides a multifunctional building material, which comprises, by mass, 10-50% of an inorganic gel material, 20-60% of a light porous material, 1-10% of inorganic powder, 1-5% of an olefin polymer, 3-10% of an ethylene-vinyl acetate copolymer, 12-25% of an acrylic acid polymerization emulsion, 5-12% of a polyurethane emulsion, and 0.1-1.5% of a release agent.
Preferably, the inorganic gel material is at least one selected from calcium sulfate, calcium oxide, silicate substances, aluminate substances and sulphoaluminate substances.
Preferably, the inorganic gel material is silicate substance; preferably, the silicate-like substance is portland cement.
Preferably, the portland cement comprises portland cement a and portland cement b.
Preferably, the portland cement a is Huarun 325 cement, purchased from Runhe-Hejiangji, Inc. of Buddha mountain.
Preferably, the particle size of the portland cement b is 300-1000 meshes, and is preferably 800 meshes.
Preferably, the specific surface area of the portland cement b is more than 800m2/kg。
Preferably, the portland cement b is purchased from Shandong Tegu novel building materials Co., Ltd, and has the model of CGM (China general microbiological culture Collection center) superfine cement.
At present, silicate minerals are used for improving certain mechanical strength, but the medium weight of a unit volume product is increased to a certain extent, a heavier product is limited in the practical application process, and the use value of the product is reduced, and the applicant unexpectedly discovers that when the silicate minerals also comprise portland cement b, the particle size is 300-1000 meshes, and the specific surface area is more than 800m2In the case of/kg, the applicant believes that the possibility is that portland cement b under such conditions contains a specific distribution of chain or layered silica skeleton and has a large specific surface area, and when it is molded by mixing with other raw materials, the portland cement b has a strong bonding force with each other, and the shrinkage rate during molding is reduced, thereby further reducing the weight per unit volume.
Preferably, the lightweight porous material is selected from at least one of ceramsite, glass wool, glass microsphere, diatomite and asbestos.
Preferably, the lightweight porous material is ceramsite.
In the present invention, the particle size of the ceramsite is not specifically limited, and commercially available ceramsite can be used as the raw material of the present invention.
Preferably, the inorganic powder is selected from the group consisting of a layered silicate powder and a carbonate powder.
Preferably, the phyllosilicate powder is at least one selected from the group consisting of kaolin, montmorillonite, talc, muscovite, wollastonite, and bentonite.
Preferably, the phyllosilicate powder is kaolin.
Preferably, the kaolin has a 2 μm sedimentation particle size of 83 to 87% according to GB/T14564-2008.
Preferably, the kaolin has an oil extraction of 55 to 66g/100g measured according to GB 5211.15-88.
Preferably, the carbonate powder is ground calcium carbonate.
Preferably, the weight ratio of the kaolin to the heavy calcium carbonate is (4-6): 1.
the applicant has made a series of researches on building materials, and the previously applied patent name is a waterproof, sun-proof and heat-insulating building material protective brick, and the applicant has found that after high-temperature baking, the mechanical strength of the brick is reduced, particularly after high-temperature treatment at more than 70 ℃, the mechanical strength is significantly reduced, the replacement period of the material is accelerated, and the construction cost is increased, and the applicant has made a series of improvements on the basis of the above, and has surprisingly found that when inorganic powder comprises layered silicate, particularly, the 2 μm sedimentation particle size of the layered silicate according to GB/T14564-2008 is 83-87%, and simultaneously the oil precipitation amount measured according to GB5211.15-88 is 55-65g/100g, at this time, after baking at 75 ℃ for 5h, the mechanical strength retention rate is higher, and the brick can bear 500KG without cracking, and the applicant considers that the possible reason is that the hydroxyl content of the inorganic filler under the conditions is better, the crystalline state is mainly amorphous or presents distorted crystal lattices, the number of metal atoms bonded with silicon is reduced, the coordination number of silicon atoms is reduced, the order degree is reduced, the compatibility and the dispersity between the inorganic powder and other raw materials of the building material in the application are improved, the stress defect in the building material is reduced, meanwhile, the interior of the inorganic powder under the condition presents a loose structure, and the inorganic powder and the heavy calcium carbonate play a role in synergy, so that the heat resistance is improved to a certain extent, and the mechanical strength at high temperature is further improved.
Preferably, the polymerized monomer in the olefin polymer is at least one selected from ethylene, propylene, butylene, butadiene, styrene and isoprene.
Preferably, the olefin polymer is at least one selected from the group consisting of a styrene-butadiene-styrene block copolymer, a propylene-butadiene copolymer, a butadiene-isoprene-butadiene block copolymer, a styrene-isoprene-styrene block copolymer, and a styrene-ethylene-propylene-styrene block copolymer.
Preferably, the olefin polymer is a styrene-butadiene-styrene block copolymer; the mass ratio of styrene to butadiene in the styrene-butadiene-styrene block copolymer is 1: (2-4).
The applicant found in experiments that, when the S/B mass ratio in the styrene-butadiene-styrene block copolymer is 1: (2-4), the high temperature resistance of the building material can be further improved, and the Applicant believes that the reason is that the specific styrene/butadiene mass ratio of the styrene-butadiene-styrene block copolymer is suitable in the distribution of the rigid and flexible segments, so that the styrene-butadiene-styrene block copolymer exists in the raw material of the building material in a filamentous, irregularly distributed manner before the molding, and there is a possibility of swelling by other components of the building material such as an oily mold release agent, and at the same time, the energy of mutual aggregation between the segments in the styrene-butadiene-styrene block copolymer is small, so that it is easy to uniformly disperse in the system, and furthermore, the acrylic ester emulsion is caused to uniformly act on the system, and the influence of the aggregation of the styrene-butadiene-styrene block copolymer on the distribution of the acrylic emulsion is avoided, at the moment, the components in the building material are distributed relatively uniformly, so that the high-temperature resistance is improved.
Preferably, the weight ratio of the inorganic powder to the styrene-butadiene-styrene block copolymer is (1-2): 1.
moreover, the Applicant has found, surprisingly, that when the weight ratio between the inorganic powder and the styrene-butadiene-styrene block copolymer is (1-2): 1, at which the waterproof effect is better at 35 ℃, and the applicant speculates that the possible reason is that under the condition, the contents of the hard particles, the hard segments and the soft segments among the raw materials of the building material are proper, the hard particles, the hard segments and the soft segments are continuously overlapped with each other during molding, a stable continuous phase is formed on the surface of the building material, and the distribution of the hard segments and the hard particles in the continuous phase prevents the penetration of water molecules under the high-temperature condition.
Preferably, the high molecular adhesive is at least one selected from polyvinyl ester, polyvinyl alcohol, acrylic polymer, polymaleate and polyurethane.
In the present invention, the form of the polymer binder is not particularly limited, and may be a resin, an emulsion, a solution, a dispersion colloidal particle, or a suspension.
Preferably, the high molecular adhesive is polyurethane emulsion and acrylic acid polymerization emulsion.
Preferably, the preparation method of the polyurethane emulsion comprises the following steps:
(1) adding polytetrahydrofuran (polytetrahydrofuran) into a reaction container, dehydrating for 1.5h at 90 ℃, then adding isophorone diisocyanate, 1, 4-butanediol and dimethylolpropionic acid, heating to 78 ℃ under the action of a catalyst, reacting for 30min, adding castor oil, and obtaining a polyurethane prepolymer after the reaction is finished;
(2) and (3) rapidly cooling the system to room temperature, adding triethylamine, reacting for 10min, adding deionized water, and emulsifying at 1000rad/min to obtain the polyurethane emulsion. The release agent was purchased from Beijing Monte great building materials Co.
Preferably, the weight ratio of polytetrahydrofuran to isophorone diisocyanate is 1: 1.8.
preferably, the weight ratio of the 1, 4-butanediol to the dimethylolpropionic acid is 1: 2.1.
preferably, the weight ratio of the triethylamine to the polytetrahydrofuran is 1: 5.5.
preferably, the preparation method of the acrylic acid polymerization emulsion is as follows:
adding acrylic acid, butyl acrylate, trimethyl benzyl ammonium chloride and hydroxybenzyl methane into a reaction container, heating to 80 ℃, dropwise adding diaminodiphenylmethane tetraglycidyl amine epoxy resin while stirring until the diaminodiphenylmethane tetraglycidyl amine epoxy resin is dropwise added, and obtaining epoxy acrylate;
(2) cooling epoxy acrylate to 65 ℃, adding trihydroxy polyether, abienol and benzoyl peroxide, stirring for reaction for 6 hours, adding N-methyl pyrrolidone, calcium lignosulphonate and water, stirring, and dispersing for 30min to obtain the acrylic emulsion.
Preferably, the weight ratio of the acrylic acid to the butyl acrylate to the trimethyl benzyl ammonium chloride to the hydroxyl phenylmethane is 85: 35: 0.15: 0.1.
preferably, the weight ratio of the diaminodiphenylmethane tetraglycidyl amine epoxy resin to the acrylate is 0.65: 1.
preferably, the weight ratio of the trihydroxy polyether to the rosin alcohol is 2.1: 1.
preferably, the weight ratio of the benzoyl peroxide to the calcium lignosulphonate is 1: 8.
preferably, the weight ratio of the N-methyl pyrrolidone to the calcium lignosulfonate is 6: 1.
preferably, the raw materials comprise, by mass, 10-30% of an inorganic gel material, 30-50% of a lightweight porous material, 2-8% of inorganic powder, 1-5% of an olefin polymer, 5-10% of an ethylene-vinyl acetate copolymer, 5-28% of a high-molecular adhesive and 0.1-1.0% of a release agent.
Preferably, the release agent is a grease-based release agent.
In the present invention, the fat-based release agent is not particularly limited, and commercially available fat-based release agents can be used as the raw material of the present invention.
The second aspect of the invention provides a preparation method of a building material, which at least comprises the following steps:
(1) adding inorganic gel material, light porous material, inorganic powder, olefin polymer, ethylene-vinyl acetate copolymer, acrylic acid polymerization emulsion and polyurethane emulsion into a stirring container, and uniformly mixing;
(2) injecting the mixture obtained in the step (1) into a mold coated with a release agent, and performing pressure molding;
(3) and drying the module obtained after the pressure forming, and demolding to obtain the building material.
The present invention will be specifically described below by way of examples. It should be noted that the following examples are only for illustrating the present invention and should not be construed as limiting the scope of the present invention, and that the insubstantial modifications and adaptations of the present invention by those skilled in the art based on the above disclosure are still within the scope of the present invention.
Example 1
The multifunctional building material comprises, by mass, 18% of portland cement a, 2% of portland cement b, 40% of ceramsite, 4% of kaolin, 1% of ground calcium carbonate, 3.5% of styrene-butadiene-styrene block copolymer, 6% of ethylene-vinyl acetate copolymer, 18% of acrylic acid polymerization emulsion, 7% of polyurethane emulsion and 0.5% of a release agent.
Also provides a preparation method of the multifunctional building material, which comprises the following steps:
(1) adding portland cement a, portland cement b, ceramsite, kaolin, ground limestone, styrene-butadiene-styrene segmented copolymer, ethylene-vinyl acetate copolymer, acrylic acid polymerization emulsion and polyurethane emulsion into a stirring container, and uniformly mixing;
(2) injecting the mixture obtained in the step (1) into a mold coated with a release agent, and carrying out pressure molding;
(3) and drying the module obtained after pressure forming at 130 ℃, and demolding to obtain the building material.
Wherein the Portland cement a is purchased from Runji building materials Co Ltd of Foshan city, and has the model of: huarun 325 cement.
Portland cement b is purchased from Shandong Tegu novel building materials Co., Ltd, and the model is CGM superfine cement.
Haydite was purchased from Haydite products of Anhui Haoyao, Inc.
Kaolin was purchased from Bright mineral products processing Co., Ltd, Ling shou county, and had a 2 μm settled particle size of 86.3% according to GB/T14564-2008 and an oil extraction amount of 65.5g/100g measured according to GB 5211.15-88.
Ground calcium carbonate was purchased from Lida ultra micro industries (Suzhou) Inc.
Styrene-butadiene-styrene block copolymer was purchased from dry and composite materials science and technology ltd, model YH-188, wherein the mass ratio of styrene to butadiene was 1: 2.5.
ethylene-vinyl acetate copolymer was purchased from Qingdao starfire geodetic corporation, type: watt's VAE emulsion 920.
Preferably, the release agent is purchased from Beijing Mongolian great industry building materials Co.
The preparation method of the acrylic acid polymerization emulsion comprises the following steps:
(1) adding acrylic acid, butyl acrylate, trimethyl benzyl ammonium chloride and hydroxybenzyl methane into a reaction container, heating to 80 ℃, dropwise adding diaminodiphenylmethane tetraglycidyl amine epoxy resin while stirring until the diaminodiphenylmethane tetraglycidyl amine epoxy resin is dropwise added, and obtaining epoxy acrylate;
(2) cooling epoxy acrylate to 65 ℃, adding trihydroxy polyether, abienol and benzoyl peroxide, stirring for reaction for 6 hours, adding N-methyl pyrrolidone, calcium lignosulphonate and water, stirring, and dispersing for 30min to obtain the acrylic emulsion.
The weight ratio of the acrylic acid to the butyl acrylate to the trimethyl benzyl ammonium chloride to the hydroxyl phenylmethane is 85: 35: 0.15: 0.1.
the weight ratio of the diaminodiphenylmethane tetraglycidyl amine epoxy resin to the acrylate is 0.65: 1.
the weight ratio of the trihydroxy polyether to the rosin alcohol is 2.1: 1.
the weight ratio of the benzoyl peroxide to the calcium lignosulphonate is 1: 8.
the weight ratio of the N-methyl pyrrolidone to the calcium lignosulphonate is 6: 1.
the preparation method of the polyurethane emulsion comprises the following steps:
(1) adding polytetrahydrofuran (polytetrahydrofuran) into a reaction container, dehydrating for 1.5h at 90 ℃, then adding isophorone diisocyanate, 1, 4-butanediol and dimethylolpropionic acid, heating to 78 ℃ under the action of a catalyst, reacting for 30min, adding castor oil, and obtaining a polyurethane prepolymer after the reaction is finished;
(2) and (3) rapidly cooling the system to room temperature, adding triethylamine, reacting for 10min, adding deionized water, and emulsifying at 1000rad/min to obtain the polyurethane emulsion. The release agent was purchased from Beijing Monte great building materials Co.
The weight ratio of polytetrahydrofuran to isophorone diisocyanate is 1: 1.8.
the weight ratio of the 1, 4-butanediol to the dimethylolpropionic acid is 1: 2.1.
the weight ratio of the triethylamine to the polytetrahydrofuran is 1: 5.5.
wherein the polytetrahydrofuran diol is purchased from Nantong Runfeng petrochemical company Limited, and the CAS number is as follows: 25190-06-1.
Example 2
The multifunctional building material is prepared from (by mass) Portland cement 25%, Portland cement 5%, ceramsite 32%, kaolin 2.4%, ground calcium carbonate 0.6%, styrene-butadiene-styrene block copolymer 2%, ethylene-vinyl acetate copolymer 4.5%, acrylic acid polymerization emulsion 20%, polyurethane emulsion 8%, and release agent 0.5%.
Also provides a preparation method of the multifunctional building material, which comprises the following steps:
(1) adding portland cement a, portland cement b, ceramsite, kaolin, ground limestone, styrene-butadiene-styrene segmented copolymer, ethylene-vinyl acetate copolymer, acrylic acid polymerization emulsion and polyurethane emulsion into a stirring container, and uniformly mixing;
(2) injecting the mixture obtained in the step (1) into a mold coated with a release agent, and carrying out pressure molding;
(3) and drying the module obtained after pressure forming at 130 ℃, and demolding to obtain the building material.
Wherein the raw materials are the same as in example 1.
Example 3
The multifunctional building material comprises, by mass, 12% of portland cement a, 3% of portland cement b, 50% of ceramsite, 4.5% of kaolin, 1% of ground limestone, 3% of styrene-butadiene-styrene block copolymer, 5% of ethylene-vinyl acetate copolymer, 15% of acrylic acid polymerization emulsion, 6% of polyurethane emulsion and 0.5% of a release agent.
Also provides a preparation method of the multifunctional building material, which comprises the following steps:
(1) adding portland cement a, portland cement b, ceramsite, kaolin, ground limestone, styrene-butadiene-styrene segmented copolymer, ethylene-vinyl acetate copolymer, acrylic acid polymerization emulsion and polyurethane emulsion into a stirring container, and uniformly mixing;
(2) injecting the mixture obtained in the step (1) into a mold coated with a release agent, and carrying out pressure molding;
(3) and drying the module obtained after pressure forming at 130 ℃, and demolding to obtain the building material.
Wherein each raw material was the same as in example 1.
Example 4
The specific implementation mode of the multifunctional building material is the same as that in example 1, except that the kaolin is added in an amount of 4.5% and the heavy calcium carbonate is added in an amount of 0.5%.
Example 5
The specific implementation mode of the multifunctional building material is the same as that of example 1, except that the kaolin is added in an amount of 2% and the ground calcium carbonate is added in an amount of 3%.
Example 6
The specific implementation mode of the multifunctional building material is the same as that of example 1, except that the addition amount of portland cement a is 20%, the addition amount of heavy calcium carbonate is 5%, portland cement b is not added, and kaolin is not added.
Example 7
The specific implementation mode of the multifunctional building material is the same as that of example 1, except that the addition amount of the Portland cement a is 20% and the Portland cement b is not added.
Example 8
The specific implementation mode of the multifunctional building material is the same as that in example 1, and the difference is that the raw materials comprise, by mass, 20.8% of portland cement a, 41.7% of ceramsite, 5.2% of ground limestone, 6.25% of ethylene-vinyl acetate copolymer, 18.3% of acrylic acid polymerization emulsion, 7.25% of polyurethane emulsion and 0.5% of release agent.
Example 9
A multifunctional building material and a method for preparing the multifunctional building material are provided, the specific implementation is the same as example 1, except that the styrene-butadiene-styrene block copolymer is purchased from Dry composite materials science and technology, Inc. with model number YH-792, wherein the mass ratio of styrene to butadiene is 1: 1.5.
example 10
The embodiment of the invention is similar to that in example 1, except that the addition amount of the styrene-butadiene-styrene block copolymer is 6.5%, the addition amount of the kaolin is 1.6%, and the addition amount of the ground calcium carbonate is 0.4%.
Example 11
The embodiment of the invention is similar to that in example 1, except that the addition amount of the styrene-butadiene-styrene block copolymer is 2%, the addition amount of the kaolin is 5.2%, and the addition amount of the heavy calcium carbonate is 1.3%.
Performance testing
1. And (5) testing mechanical strength.
(1) The building materials obtained in the examples were baked at 75 ℃ for 5 hours, and 500kg/m were applied to the building materials2The weight of the building material, the occurrence of cracks after 5 hours of baking at 75 ℃ of the building material was recorded.
(2) The construction materials obtained in the examples were baked at 75 ℃ for 10 hours, and 500kg/m were applied to the construction materials2The weight of the building material, the occurrence of cracks after baking the building material at 75 ℃ for 10 hours was recorded.
2. Weight difference of building materials.
The building material obtained in each example was 1m2The difference between the weight of the building material of the other examples and the weight of the building material of the example was calculated as G1 and G2, which are the reference values of the weight of the building material of the example 6.
The difference is (G2-G1)/G2 x 100%.
3. And (4) a waterproof effect.
The building materials prepared in the examples are subjected to a water absorption test by referring to GB/T2542-2012. The construction material was dried at 105 ℃ to constant weight, designated as M1, and the dried construction material was immersed in clear water at 35 ℃ for 24 hours, taken out of the construction material, wiped with wet lint, and weighed to mass, designated as M2. The water absorption was calculated.
Water absorption rate (M2-M1)/M1 × 100%.
The above test data is recorded in table 1.
TABLE 1
Figure BDA0003088910940000111
Figure BDA0003088910940000121
The foregoing examples are merely illustrative and serve to explain some of the features of the method of the present invention. The appended claims are intended to claim as broad a scope as is contemplated, and the examples presented herein are merely illustrative of selected implementations in accordance with all possible combinations of examples. Accordingly, it is applicants' intention that the appended claims are not to be limited by the choice of examples illustrating features of the invention. Also, where numerical ranges are used in the claims, subranges therein are included, and variations in these ranges are also to be construed as possible being covered by the appended claims.

Claims (3)

1. A multifunctional building material is characterized in that the raw materials comprise, by mass, 10-50% of an inorganic gel material, 20-60% of a light porous material, 1-10% of inorganic powder, 1-5% of an olefin polymer, 3-10% of an ethylene-vinyl acetate copolymer, 5-35% of a high-molecular adhesive and 0.1-1.5% of a release agent;
the inorganic gel material is portland cement comprising portland cement a and portland cement b, the particle size of the portland cement b is 300-1000 meshes, and the specific surface area is more than 800m2/kg；
The inorganic powder is phyllosilicate powder and carbonate powder, the phyllosilicate powder is kaolin, and the 2 mu m sedimentation particle size of the kaolin according to GB/T14564-2008 is 83-87%; the oil extraction amount measured according to GB5211.15-88 is 55-66g/100 g. The carbonate powder is heavy calcium carbonate; the kaolin and the heavy calcium carbonate have the weight ratio of (4-6): 1;
the olefin polymer is a styrene-butadiene-styrene block copolymer; the mass ratio of styrene to butadiene in the styrene-butadiene-styrene block copolymer is 1: (2-4); the weight ratio of the inorganic powder to the olefin copolymer is (1-2): 1.
2. the building material of claim 1, wherein the lightweight porous material is selected from at least one of ceramsite, glass wool, glass microspheres, diatomaceous earth, and asbestos.
3. A method for preparing a building material according to any of claims 1-2, characterized in that it comprises at least the following steps:
(1) adding inorganic gel material, light porous material, inorganic powder, olefin polymer, ethylene-vinyl acetate copolymer and high molecular adhesive into a stirring container, and uniformly mixing;
(2) injecting the mixture obtained in the step (1) into a mold coated with a release agent, and performing pressure molding;
(3) and drying the module obtained after the pressure forming, and demolding to obtain the building material.
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