CN110759687A - Foam concrete and preparation method thereof - Google Patents
Foam concrete and preparation method thereof Download PDFInfo
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- CN110759687A CN110759687A CN201910771588.3A CN201910771588A CN110759687A CN 110759687 A CN110759687 A CN 110759687A CN 201910771588 A CN201910771588 A CN 201910771588A CN 110759687 A CN110759687 A CN 110759687A
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- 239000011381 foam concrete Substances 0.000 title claims abstract description 51
- 238000002360 preparation method Methods 0.000 title claims abstract description 18
- 239000000843 powder Substances 0.000 claims abstract description 41
- 239000004568 cement Substances 0.000 claims abstract description 26
- 239000010456 wollastonite Substances 0.000 claims abstract description 20
- 229910052882 wollastonite Inorganic materials 0.000 claims abstract description 20
- 239000010881 fly ash Substances 0.000 claims abstract description 18
- 239000002994 raw material Substances 0.000 claims abstract description 17
- 239000002002 slurry Substances 0.000 claims abstract description 17
- 239000006261 foam material Substances 0.000 claims abstract description 16
- 239000011230 binding agent Substances 0.000 claims abstract description 13
- 239000004088 foaming agent Substances 0.000 claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 12
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000002270 dispersing agent Substances 0.000 claims abstract description 10
- 238000001035 drying Methods 0.000 claims abstract description 10
- 238000000498 ball milling Methods 0.000 claims abstract description 7
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 6
- 239000011707 mineral Substances 0.000 claims abstract description 6
- 239000006185 dispersion Substances 0.000 claims abstract description 4
- 238000005245 sintering Methods 0.000 claims abstract description 4
- 238000003756 stirring Methods 0.000 claims description 20
- 239000003245 coal Substances 0.000 claims description 15
- 239000003365 glass fiber Substances 0.000 claims description 15
- -1 hydroxyalkyl ether sulfonate Chemical compound 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 15
- 238000002156 mixing Methods 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 11
- SZKKRCSOSQAJDE-UHFFFAOYSA-N Schradan Chemical group CN(C)P(=O)(N(C)C)OP(=O)(N(C)C)N(C)C SZKKRCSOSQAJDE-UHFFFAOYSA-N 0.000 claims description 9
- 239000002893 slag Substances 0.000 claims description 7
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 6
- 239000011398 Portland cement Substances 0.000 claims description 6
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims description 6
- 150000001875 compounds Chemical class 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 6
- 239000004711 α-olefin Substances 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 5
- 229910010293 ceramic material Inorganic materials 0.000 claims description 5
- 239000003795 chemical substances by application Substances 0.000 claims description 5
- 239000006260 foam Substances 0.000 claims description 5
- 239000010439 graphite Substances 0.000 claims description 5
- 229910002804 graphite Inorganic materials 0.000 claims description 5
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- 239000000243 solution Substances 0.000 claims description 5
- WYTZZXDRDKSJID-UHFFFAOYSA-N (3-aminopropyl)triethoxysilane Chemical compound CCO[Si](OCC)(OCC)CCCN WYTZZXDRDKSJID-UHFFFAOYSA-N 0.000 claims description 3
- 125000003903 2-propenyl group Chemical group [H]C([*])([H])C([H])=C([H])[H] 0.000 claims description 3
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 claims description 3
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 3
- CMHMMKSPYOOVGI-UHFFFAOYSA-N Isopropylparaben Chemical compound CC(C)OC(=O)C1=CC=C(O)C=C1 CMHMMKSPYOOVGI-UHFFFAOYSA-N 0.000 claims description 3
- 239000002202 Polyethylene glycol Substances 0.000 claims description 3
- 230000004913 activation Effects 0.000 claims description 3
- 150000005215 alkyl ethers Chemical class 0.000 claims description 3
- 150000008052 alkyl sulfonates Chemical class 0.000 claims description 3
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 3
- 229940088990 ammonium stearate Drugs 0.000 claims description 3
- JPNZKPRONVOMLL-UHFFFAOYSA-N azane;octadecanoic acid Chemical compound [NH4+].CCCCCCCCCCCCCCCCCC([O-])=O JPNZKPRONVOMLL-UHFFFAOYSA-N 0.000 claims description 3
- 235000019864 coconut oil Nutrition 0.000 claims description 3
- 239000003240 coconut oil Substances 0.000 claims description 3
- 239000007822 coupling agent Substances 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 3
- 239000008367 deionised water Substances 0.000 claims description 3
- 229910021641 deionized water Inorganic materials 0.000 claims description 3
- 235000014113 dietary fatty acids Nutrition 0.000 claims description 3
- 229930195729 fatty acid Natural products 0.000 claims description 3
- 239000000194 fatty acid Substances 0.000 claims description 3
- 150000004665 fatty acids Chemical class 0.000 claims description 3
- 125000002768 hydroxyalkyl group Chemical group 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 239000011259 mixed solution Substances 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims description 3
- 230000010355 oscillation Effects 0.000 claims description 3
- 229920001223 polyethylene glycol Polymers 0.000 claims description 3
- 229920002635 polyurethane Polymers 0.000 claims description 3
- 239000004814 polyurethane Substances 0.000 claims description 3
- 239000011148 porous material Substances 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- SZHIIIPPJJXYRY-UHFFFAOYSA-M sodium;2-methylprop-2-ene-1-sulfonate Chemical compound [Na+].CC(=C)CS([O-])(=O)=O SZHIIIPPJJXYRY-UHFFFAOYSA-M 0.000 claims description 3
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 claims description 3
- 238000009210 therapy by ultrasound Methods 0.000 claims description 3
- 238000005469 granulation Methods 0.000 claims description 2
- 230000003179 granulation Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 claims description 2
- 238000009413 insulation Methods 0.000 abstract description 11
- 239000000853 adhesive Substances 0.000 abstract description 2
- 230000001070 adhesive effect Effects 0.000 abstract description 2
- 230000035939 shock Effects 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 description 4
- 238000010276 construction Methods 0.000 description 4
- 238000004134 energy conservation Methods 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 125000003277 amino group Chemical group 0.000 description 2
- 239000004566 building material Substances 0.000 description 2
- 125000003700 epoxy group Chemical group 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 238000009436 residential construction Methods 0.000 description 2
- 239000007767 bonding agent Substances 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920006327 polystyrene foam Polymers 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/06—Aluminous cements
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Porous Artificial Stone Or Porous Ceramic Products (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses foam concrete and a preparation method thereof, and the foam concrete and the preparation method thereof comprise the following raw materials in parts by weight: 160-200 parts of cement; 60-140 parts of mineral powder; 60-130 parts of fly ash; 120-210 parts of water; 80-140 parts of a foam material; 12-25 parts of a binder; 10-20 parts of a foaming agent; 10-20 parts of a dispersing agent; 60-90 parts of coated wollastonite powder, wherein the coated wollastonite powder is prepared by the following steps: firstly, performing ball milling dispersion treatment on raw material wollastonite powder by using alcohol for 4-6h, drying the obtained slurry, and sintering at the temperature of 420-480 ℃ for 2-3 h. According to the invention, the waterproof adhesive is used for bonding the gaps on the surface of the foam concrete, so that the heat conduction of the foam concrete is prevented, the heat insulation performance of the foam concrete is further improved, the flame retardance and the compressive strength can be greatly improved, the shock resistance, the sound insulation, the weather resistance and the weathering resistance of the finished product of the foam concrete product are enhanced to a certain extent, and the reliability and the practicability of the product are improved.
Description
Technical Field
The invention relates to the technical field of concrete, in particular to foam concrete and a preparation method thereof.
Background
In recent years, domestic requirements on energy conservation, environmental protection and environmental protection are continuously improved, energy conservation work of residential construction is continuously deepened, energy conservation standards are continuously improved, a plurality of novel energy-saving technologies and materials are introduced and developed, the energy-saving materials are widely popularized and used in the residential construction, foam concrete is used as a novel energy-saving material which is waste-utilizing, environment-friendly, energy-saving, fireproof and low in price, the foam concrete has a special porous structure and excellent heat insulation performance, industrial waste materials such as fly ash, slag and stone powder can be greatly utilized in production of the foam concrete, waste discharge is reduced, ecological conditions can be effectively improved, the ecological environment is protected, economic benefits and social benefits are very obvious, however, the foam concrete generally has the defect of low compressive strength, and the wide application and popularization of the foam concrete are influenced.
Chinese patent number 201010264056.X discloses a high-strength, light-weight, low-heat-conductivity coefficient, simple formula and convenient construction; the industrial and mining waste is utilized, the cost is reduced, and the polystyrene foam board, the extruded sheet and the insulation system slurry particle insulation board can be partially replaced. The foam concrete and the preparation method thereof are suitable for foam concrete heat insulation system construction of on-site floors and roofs and production of foam concrete blocks and heat insulation plates by using moulds in factories, and in order to realize the technical problems, the foam concrete and the preparation method thereof comprise the following components: cement, mineral powder, fly ash and water, and also comprises a waterproof agent, fibers, auxiliary materials and a foaming agent; 50-200 parts of cement, 10-100 parts of mineral powder, 10-150 parts of fly ash, 60-250 parts of water, 0-3 parts of waterproof agent, 0.3-1 part of fiber and 0.1-3 parts of auxiliary material are placed in a container according to the parts by weight, stirred uniformly by a stirrer, poured with 6-20 parts of foaming agent for mixing and stirring, quickly paved on a construction surface, naturally leveled, foamed within 2-30 minutes after standing, and reaches the strength after 24 hours, and the formed foam concrete is formed after maintenance.
However, the compressive strength of the foam concrete is unstable, wherein the compressive strength of the foam concrete does not reach the lowest strength grade of the foam concrete under 0.3MPa, and the foam concrete and the preparation method are not beneficial to being put into construction. Therefore, there is a need for a foamed concrete and a method for preparing the same to solve the above problems.
Disclosure of Invention
Based on the technical problems in the background art, the invention provides foam concrete and a preparation method thereof.
The invention provides foam concrete and a preparation method thereof, and the foam concrete and the preparation method thereof comprise the following raw materials in parts by weight:
160-200 parts of cement;
60-140 parts of mineral powder;
60-130 parts of fly ash;
120-210 parts of water;
80-140 parts of a foam material;
12-25 parts of a binder;
10-20 parts of a foaming agent;
10-20 parts of a dispersing agent;
60-90 parts of coated wollastonite powder.
Further, the coated wollastonite powder is prepared by the following steps:
(1) firstly, performing ball milling dispersion treatment on raw material wollastonite powder by using alcohol for 4-6h, drying the obtained slurry, sintering the dried slurry at the temperature of 420-480 ℃ for 2-3h, cooling the slurry to room temperature, adding 1-3% of ammonium stearate, 1-2% of coconut oil fatty acid diethanolamide, 1-3% of isopropyl p-hydroxybenzoate and 10-20% of deionized water according to the weight of the slurry, performing ultrasonic oscillation for 35-45min, and then stirring the mixture in a constant-temperature water bath at the temperature of 65-70 ℃ for 35-40min to obtain a modified compound mixed solution; then adding 20% Al (NO3)3 solution which is 10-20% of the modified compound liquid, adding a proper amount of ammonia water to adjust the pH value to 8-11, stirring for 30-40min, and standing for 2-4 h;
(2) after being filtered, washed and dried, the raw materials are sintered for 4 to 5 hours at 480 ℃ and 520 ℃ and naturally cooled to room temperature, and the coated wollastonite powder required by the raw materials of the invention is prepared.
Further, the foaming agent is any one or a mixture of more than two of alkyl sulfonate, hydroxyalkyl ether sulfonate, alkyl ether sulfonate, hydroxyalkyl ether sulfate, α -olefin sulfonate, alkylbenzene sulfonate, alkyl ether sulfate, α -olefin sulfate and alkylbenzene sulfate.
Further, the binder is a waterproof binder; the cement is at least one of Portland cement and sulphoaluminate cement; the dispersant is one of allyl ether ester, allyl polyethylene glycol, acrylamide and sodium methallyl sulfonate; the foam material is any one or a mixture of more than two of graphite, ceramic material and sintered foam metal.
Further, the cement and the fly ash or the fly ash and the slag micro powder are formed, wherein the mass percentage of the cement in the cementing material is 30-90%, the mass percentage of the fly ash or the slag micro powder in the cementing material is 10-70%, and the cement is general portland cement with the grade being more than or equal to 42.5 MPa.
A foam concrete and a preparation method thereof comprise the following steps:
(1) preparing raw materials according to the weight part ratio;
(2) firstly, adding a dispersing agent into a foam material, uniformly stirring, sealing pores of the foam material by using a binder, and finally drying to obtain a product A;
(3) adding gamma-aminopropyltriethoxysilane as a coupling agent and polyurethane as a film forming agent into ethanol, mixing and stirring, performing ultrasonic treatment for 10min, drying at 120 ℃ for 4h to obtain surface-treated E-glass fiber, mixing the E-glass fiber and octamethyl polyhedral oligomeric silsesquioxane, stirring at low speed, adding a double-screw extruder, and performing melt blending granulation to obtain a product B;
(4) crushing the coal gangue by using a jaw crusher, and then placing the crushed coal gangue into a ball mill for ball milling to obtain coal gangue powder; putting the coal gangue powder into a muffle furnace, preserving heat for 2-3h at the temperature of 700-900 ℃ for activation treatment, and naturally cooling to obtain activated coal gangue powder, namely a product C;
(5) putting cement, ore powder, coated wollastonite powder, fly ash and a foaming agent into a container, uniformly stirring by using a stirrer, then pouring the product A obtained in the step 2, the product B obtained in the step 3 and the product C obtained in the step 4, mixing and stirring uniformly;
(6) then pouring the material into a mold, placing the mold in a curing room for gas generation and hardening treatment, wherein the curing temperature is 38-42 ℃, the curing relative humidity is 70-80%, and the curing time is 4-6 h;
(7) finally, cutting, molding and autoclaving.
The invention has the following beneficial effects:
1. the foam concrete prepared by the invention keeps the advantages of waste utilization, environmental protection, energy conservation, fire prevention and low price of the traditional foam concrete, and also increases the advantages which the traditional foam concrete does not have: good and stable compressive strength.
2. The invention adopts graphite, ceramic material or sintered foam metal and the like as foam materials to replace gaps in the traditional foam concrete, has good heat-conducting property and is not beneficial to the heat-insulating property of the foam concrete, but the gaps on the surface of the foam concrete are bonded by the waterproof bonding agent to prevent the heat conduction, thereby increasing the heat-insulating property of the invention.
3. The invention adopts the mutual matching of the E-glass fiber and the octamethyl polyhedral oligomeric silsesquioxane, wherein the surface of the E-glass fiber has more amino groups, the E-glass fiber reacts with the octamethyl polyhedral oligomeric silsesquioxane (pos) containing epoxy groups, the nanoscale pos is embedded with the glass fiber, and the E-glass fiber with a thick line structure is wrapped by the octamethyl polyhedral oligomeric silsesquioxane with a dotted structure, so that the flame retardance and the compressive strength can be greatly improved.
4. The invention adds the coated wollastonite powder to obviously improve the dry density value, the compressive strength and the thermal insulation performance of the finished foam concrete product, so that the shock resistance, the sound insulation performance, the weather resistance and the weathering resistance of the finished foam concrete product are enhanced to a certain extent, the reliability and the practicability of the product are improved, and the development of novel building materials is promoted.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The foam concrete and the preparation method thereof comprise the following raw materials in parts by weight:
180 parts of cement;
70 parts of ore powder;
85 parts of fly ash;
185 parts of water;
95 parts of foam material;
17 parts of a binder;
14 parts of a foaming agent;
15 parts of a dispersing agent;
75 parts of coated wollastonite powder.
Further, the coated wollastonite powder is prepared by the following steps:
(1) firstly, carrying out ball milling dispersion treatment on raw material wollastonite powder by using alcohol for 5h, drying the obtained slurry, sintering the dried slurry at 450 ℃ for 2.5h, cooling the slurry to room temperature, adding ammonium stearate accounting for 2 percent of the weight of the slurry, coconut oil fatty acid diethanolamide accounting for 1.6 percent of the weight of the slurry, isopropyl p-hydroxybenzoate accounting for 1.5 percent of the weight of the slurry and deionized water accounting for 15 percent of the weight of the slurry, carrying out ultrasonic oscillation for 40min, and then stirring the mixture in a constant-temperature water bath at 65 ℃ for 40min to obtain a modified compound mixed solution; then adding 20% Al (NO3)3 solution which is 15% of the modified compound liquid by weight, adding a proper amount of ammonia water to adjust the pH value to 10, stirring for 40min, and standing for 3.5 h;
(2) after being filtered, washed and dried, the raw materials are sintered for 4.5 hours at 500 ℃ and naturally cooled to room temperature, and the coated wollastonite powder required by the raw materials of the invention is prepared.
Further, the foaming agent is any one or a mixture of more than two of alkyl sulfonate, hydroxyalkyl ether sulfonate, alkyl ether sulfonate, hydroxyalkyl ether sulfate, α -olefin sulfonate, alkylbenzene sulfonate, alkyl ether sulfate, α -olefin sulfate and alkylbenzene sulfate.
Further, the binder is a waterproof binder; the cement is at least one of Portland cement and sulphoaluminate cement; the dispersant is one of allyl ether ester, allyl polyethylene glycol, acrylamide and sodium methallyl sulfonate; the foam material is any one or a mixture of more than two of graphite, ceramic material and sintered foam metal, the graphite, ceramic material or sintered foam metal and the like are used as the foam material to replace gaps in the traditional foam concrete, the foam material has good heat-conducting property and is not beneficial to the heat-insulating property of the foam concrete, but the waterproof adhesive is used for bonding the gaps on the surface of the foam concrete to prevent the heat conduction of the foam concrete, so that the heat-insulating property of the foam concrete is improved.
Further, the cement is composed of cement and fly ash or composed of cement and slag micropowder, wherein the mass percent of the cement in the cementing material is 45%, the mass percent of the fly ash or slag micropowder in the cementing material is 25%, and the cement is general portland cement with the mark number more than or equal to 42.5 MPa.
A foam concrete and a preparation method thereof comprise the following steps:
(1) preparing raw materials according to the weight part ratio;
(2) firstly, adding a dispersing agent into a foam material, uniformly stirring, sealing pores of the foam material by using a binder, and finally drying to obtain a product A;
(3) adding gamma-aminopropyltriethoxysilane as a coupling agent and polyurethane as a film-forming agent into ethanol, mixing and stirring, performing ultrasonic treatment for 10min, drying at 120 ℃ for 4h to obtain surface-treated E-glass fiber, mixing the E-glass fiber and octamethyl polyhedral oligomeric silsesquioxane, stirring at low speed, adding a double-screw extruder for melting, blending and granulating to obtain a product B, matching the E-glass fiber and the octamethyl polyhedral oligomeric silsesquioxane, wherein more amino groups are arranged on the surface of the E-glass fiber, reacting with octamethyl polyhedral oligomeric silsesquioxane (pos) containing epoxy groups, embedding the nanoscale pos and the glass fiber, and wrapping the E-glass fiber with a thick line structure by using the octamethyl polyhedral oligomeric silsesquioxane with a dotted structure, the flame retardance and the compressive strength can be greatly improved;
(4) crushing the coal gangue by using a jaw crusher, and then placing the crushed coal gangue into a ball mill for ball milling to obtain coal gangue powder; putting the coal gangue powder into a muffle furnace, preserving heat for 2.5 hours at the temperature of 800 ℃ for activation treatment, and naturally cooling to obtain activated coal gangue powder, namely a product C;
(5) cement, mineral powder, coated wollastonite powder, fly ash and a foaming agent are put into a container, the mixture is uniformly stirred by a stirrer, then the product A obtained in the step 2, the product B obtained in the step 3 and the product C obtained in the step 4 are poured, mixed and stirred, and the mixture is uniformly stirred, so that the finished foam concrete product is remarkably improved in dry density value, compressive strength and thermal insulation performance by the coated wollastonite powder, the finished foam concrete product has certain reinforcement on seismic resistance, sound insulation, weather resistance and weathering resistance, the reliability and practicability of the product are improved, and the development of novel building materials is promoted;
(6) then pouring the materials into a mold, placing the mold in a curing room for gas generation and hardening treatment, wherein the curing temperature is 40 ℃, the curing relative humidity is 75%, and the curing time is 6 hours;
(7) finally, cutting, molding and autoclaving.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (6)
1. The foam concrete and the preparation method thereof are characterized by comprising the following raw materials in parts by weight: 160-200 parts of cement; 60-140 parts of mineral powder; 60-130 parts of fly ash; 120-210 parts of water; 80-140 parts of a foam material;
12-25 parts of a binder; 10-20 parts of a foaming agent; 10-20 parts of a dispersing agent; 60-90 parts of coated wollastonite powder.
2. The foamed concrete and the preparation method thereof according to claim 1, wherein the coated wollastonite powder is prepared by the following steps: firstly, performing ball milling dispersion treatment on raw material wollastonite powder by using alcohol for 4-6h, drying the obtained slurry, sintering the dried slurry at the temperature of 420-480 ℃ for 2-3h, cooling the slurry to room temperature, adding 1-3% of ammonium stearate, 1-2% of coconut oil fatty acid diethanolamide, 1-3% of isopropyl p-hydroxybenzoate and 10-20% of deionized water according to the weight of the slurry, performing ultrasonic oscillation for 35-45min, and then stirring the mixture in a constant-temperature water bath at the temperature of 65-70 ℃ for 35-40min to obtain a modified compound mixed solution; then adding 20% Al (NO3)3 solution which is 10-20% of the modified compound liquid, adding a proper amount of ammonia water to adjust the pH value to 8-11, stirring for 30-40min, and standing for 2-4 h; after being filtered, washed and dried, the raw materials are sintered for 4 to 5 hours at 480 ℃ and 520 ℃ and naturally cooled to room temperature, and the coated wollastonite powder required by the raw materials of the invention is prepared.
3. The foamed concrete and the method for producing the same as claimed in claim 1, wherein the foaming agent is one or a mixture of two or more of alkyl sulfonate, hydroxyalkyl ether sulfonate, alkyl ether sulfonate, hydroxyalkyl ether sulfate, α -olefin sulfonate, alkylbenzene sulfonate, alkyl ether sulfate, α -olefin sulfate, and alkylbenzene sulfate.
4. The foamed concrete and method of claim 1 wherein said binder is a waterproof binder; the cement is at least one of Portland cement and sulphoaluminate cement; the dispersing agent is one of allyl ether ester, allyl polyethylene glycol, acrylamide and sodium methallyl sulfonate; the foam material is any one or a mixture of more than two of graphite, ceramic material and sintered foam metal.
5. The foam concrete and the preparation method thereof according to claim 1, characterized in that the cement and the fly ash or the fly ash and the slag micropowder are composed of 30-90% by mass of the cement in the binding material, 10-70% by mass of the fly ash or the slag micropowder in the binding material, and the cement is general portland cement with a mark number of more than or equal to 42.5 MPa.
6. The foam concrete and the preparation method thereof are characterized by comprising the following steps: (1) preparing raw materials according to the weight part ratio; (2) firstly, adding a dispersing agent into a foam material, uniformly stirring, sealing pores of the foam material by using a binder, and finally drying to obtain a product A; (3) adding gamma-aminopropyltriethoxysilane as a coupling agent and polyurethane as a film forming agent into ethanol, mixing and stirring, performing ultrasonic treatment for 10min, drying at 120 ℃ for 4h to obtain surface-treated E-glass fiber, mixing the E-glass fiber and octamethyl polyhedral oligomeric silsesquioxane, stirring at low speed, adding a double-screw extruder, and performing melt blending granulation to obtain a product B; (4) crushing the coal gangue by using a jaw crusher, and then placing the crushed coal gangue into a ball mill for ball milling to obtain coal gangue powder; putting the coal gangue powder into a muffle furnace, preserving heat for 2-3h at the temperature of 700-900 ℃ for activation treatment, and naturally cooling to obtain activated coal gangue powder, namely a product C; (5) putting cement, ore powder, coated wollastonite powder, fly ash and a foaming agent into a container, uniformly stirring by using a stirrer, then pouring the product A obtained in the step 2, the product B obtained in the step 3 and the product C obtained in the step 4, mixing and stirring uniformly; (6) then pouring the material into a mold, placing the mold in a curing room for gas generation and hardening treatment, wherein the curing temperature is 38-42 ℃, the curing relative humidity is 70-80%, and the curing time is 4-6 h; (7) finally, cutting, molding and autoclaving.
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| CN113233863A (en) * | 2021-04-15 | 2021-08-10 | 张昌治 | Foam concrete and production process thereof |
| CN113501707A (en) * | 2021-08-11 | 2021-10-15 | 安徽紫朔环境工程技术有限公司 | High-temperature resistant ceramic fiber filter tube for waste gas treatment |
| CN117466599A (en) * | 2023-11-01 | 2024-01-30 | 宿迁华美新材料有限公司 | Corrosion-resistant precast concrete square pile |
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