CN110776333A - Composite autoclaved aerated concrete block and preparation method thereof - Google Patents

Composite autoclaved aerated concrete block and preparation method thereof Download PDF

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Publication number
CN110776333A
CN110776333A CN201911247008.7A CN201911247008A CN110776333A CN 110776333 A CN110776333 A CN 110776333A CN 201911247008 A CN201911247008 A CN 201911247008A CN 110776333 A CN110776333 A CN 110776333A
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parts
mass
stirring
building block
reinforcing frame
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童乃永
张来文
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Jiangsu Hongsheng Environmental Protection Technology Co Ltd
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Jiangsu Hongsheng Environmental Protection Technology Co Ltd
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    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02Compositions 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
    • C04B28/06Aluminous cements
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B40/00Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
    • C04B40/02Selection of the hardening environment
    • C04B40/024Steam hardening, e.g. in an autoclave
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/0014Use of organic additives
    • C08J9/0023Use of organic additives containing oxygen
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/0061Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof characterized by the use of several polymeric components
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/0066Use of inorganic compounding ingredients
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/0095Mixtures of at least two compounding ingredients belonging to different one-dot groups
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/04Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
    • C08J9/12Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent
    • C08J9/14Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent organic
    • C08J9/141Hydrocarbons
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L75/00Compositions of polyureas or polyurethanes; Compositions of derivatives of such polymers
    • C08L75/04Polyurethanes
    • C08L75/08Polyurethanes from polyethers
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/40Porous or lightweight materials
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2203/00Foams characterized by the expanding agent
    • C08J2203/14Saturated hydrocarbons, e.g. butane; Unspecified hydrocarbons
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2375/00Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
    • C08J2375/04Polyurethanes
    • C08J2375/08Polyurethanes from polyethers
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2400/00Characterised by the use of unspecified polymers
    • C08J2400/10Polymers characterised by the presence of specified groups, e.g. terminal or pendant functional groups

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Materials Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Ceramic Engineering (AREA)
  • Structural Engineering (AREA)
  • Inorganic Chemistry (AREA)
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  • Toxicology (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Porous Artificial Stone Or Porous Ceramic Products (AREA)

Abstract

A composite autoclaved aerated concrete block comprises the following raw materials by mass: 50-70 parts of fly ash, 10-30 parts of sulphoaluminate cement, 10-20 parts of glass fiber, 10-20 parts of carbon fiber, 10-15 parts of quartz sand, 10-15 parts of lime, 5-10 parts of mica, 5-9 parts of gypsum, 3-7 parts of sulfonated melamine formaldehyde resin and 1-1.5 parts of aluminum paste; according to the invention, through the improvement of the manufacturing process, the structural design of the composite material and the selection of the composite material, under the condition of ensuring that the building block has various excellent performances, the composite material in the building block can be tightly combined with the building block, and the abnormal sound problem can not occur.

Description

Composite autoclaved aerated concrete block and preparation method thereof
Technical Field
The invention relates to a novel building material, in particular to a composite autoclaved aerated concrete block and a preparation method thereof.
Background
The autoclaved aerated concrete block is a porous concrete product prepared by using fly ash, lime, cement, gypsum, slag and the like as main raw materials, adding a proper amount of a gas former, a regulator and a bubble stabilizer, and carrying out the processes of batching, stirring, pouring, standing, cutting, high-pressure steam curing and the like. The autoclaved aerated concrete block has unit volume weight one third of that of clay brick, heat insulating performance 3-4 times that of clay brick, sound insulating performance 2 times that of clay brick, anti-permeability over one time that of clay brick, and fireproof performance 6-8 times that of reinforced concrete. The autoclaved aerated concrete block has excellent construction characteristics, can produce various specifications in a factory, can be sawed, planed, drilled and nailed like wood, has higher construction speed due to larger volume, and can be used as a filling material of a common building.
In order to pursue higher structural strength and better heat and sound insulation effects, other materials, such as polyurethane foam, a rubber layer, a high-strength fiber rope and the like, are added into the existing autoclaved aerated concrete block to form a composite structure, and the problem can be brought in practice: the added reinforcing material has a large difference with the building block material, so different thermal expansion coefficients and repeated thermal expansion and cold contraction between different materials exist, meanwhile, the contact section of the building block with other materials is easy to pulverize, the adhesiveness is not strong, in addition, the materials are aged and the like, the contact surface between the materials can not be tightly combined under various factors over time, even gaps can appear, and therefore, the performance reduction and abnormal sound of the building block can be brought, especially, the wind pressure change of a high-rise building is large, the outer wall is easy to vibrate under the condition of blowing strong wind, and the abnormal sound phenomenon is particularly obvious.
Disclosure of Invention
Aiming at the problems, the invention provides a composite autoclaved aerated concrete block and a preparation method thereof, under the condition of ensuring various excellent performances, the composite material in the composite autoclaved aerated concrete block can be tightly combined with the block, and the abnormal sound problem can not occur.
The technical scheme adopted by the invention for solving the technical problems is as follows: a reinforced frame is arranged in a building block body, the reinforced frame is of a hollow structure, a plurality of through holes are formed in the wall of the reinforced frame, and polyurethane foam is filled in the reinforced frame;
the building block body comprises the following raw materials in percentage by mass: 50-70 parts of fly ash, 10-30 parts of sulphoaluminate cement, 10-20 parts of glass fiber, 10-20 parts of carbon fiber, 10-15 parts of quartz sand, 10-15 parts of lime, 5-10 parts of mica, 5-9 parts of gypsum, 3-7 parts of sulfonated melamine formaldehyde resin and 1-1.5 parts of aluminum paste;
the reinforcing frame comprises the following raw materials in parts by mass: 20-30 parts of polytetramethylene ether glycol, 20-30 parts of high-temperature resistant unsaturated resin, 10-20 parts of dioctyl azelate, 5-8 parts of trimethylolpropane, 3-5 parts of fumed silica, 3-5 parts of epoxy octyl stearate and 5-10 parts of polymethylene polyphenyl polyisocyanate, and the polyurethane is prepared by stirring, mixing, vacuum defoaming, pouring into a mold, demolding and curing;
the polyurethane foam raw materials comprise the following components in percentage by mass: 20-30 parts of polytetramethylene ether glycol, 20-30 parts of high-temperature-resistant unsaturated resin, 10-20 parts of dioctyl azelate, 5-10 parts of cyclopentane, 5-8 parts of trimethylolpropane, 3-5 parts of fumed silica, 3-5 parts of epoxy octyl stearate and 1-2 parts of pentamethyl divinyl triamine, and the high-pressure foaming machine is used for preparing the high-temperature-resistant high-performance epoxy resin.
The preparation method of the building block comprises the following steps:
(1) respectively grinding fly ash, gypsum and mica to 80-120 meshes by using a ball mill, crushing lime by using a crusher until the balance of the lime passing through a square-hole sieve with the fineness of 0.08mm is less than 8% for later use, and mixing the fly ash, quartz sand, mica and gypsum by adding water to prepare slurry according to the mass part ratio (namely the mass part ratio mentioned in claim 1, the same applies below), wherein the mass of the water is 0.5-0.7 time of the total mass of the fly ash, the quartz sand, the mica and the gypsum;
(2) adding the slurry prepared in the step 1 into a pouring stirrer for stirring, and adding the lime in the mass part ratio during stirring for 10-20 min; adding the glass fiber and the carbon fiber in the mass portion ratio into the slurry, stirring for 5-15min, and then standing for 40-70 min;
(3) adding the sulphoaluminate cement and the sulfonated melamine formaldehyde resin in the mass portion ratio into the slurry obtained in the step 2, uniformly stirring, and then sending the mixture into a static curing chamber for static curing for 180min to thicken the mixture to obtain total slurry;
(4) putting the aluminum powder paste into a stirring tank, adding water which is 7-12 times of the mass of the aluminum powder paste, uniformly stirring to obtain aluminum powder liquid, adding the aluminum powder liquid into the total slurry obtained in the step (3), stirring for 2-6min, and pouring into a mold provided with a plurality of reinforcing frames;
(5) curing the autoclaved aerated concrete in the mold in a pre-curing chamber at 50-60 ℃ for 4-8h to form a stable blank, demolding, and cutting according to the required specification to obtain a blank before a kettle;
(6) conveying the blank in front of the autoclave into the autoclave, starting to pump low pressure after closing a door of the autoclave, reducing the pressure in the autoclave to be not more than 0.05MPa within 10-20min, starting to boost and heat up after maintaining for 20-30min, increasing the pressure to 2-4MPa within 20-60min, increasing the temperature to 140-160 ℃, starting to cool down after maintaining for 30-60min, reducing the temperature to 120-130 ℃, maintaining for 4-6h, reducing the pressure to normal pressure within 10-20min, then carrying out natural cooling of the building block, injecting polyurethane foam into a reinforcing frame after cooling, carrying out and warehousing, and obtaining the concrete building block finished product.
The hardness of the concrete block is greatly improved by adding the sulphoaluminate cement and the quartz sand into the fly ash, and then two high-strength fibers, namely the glass fiber and the carbon fiber, are added into the fly ash, so that the strength of the whole material is further improved, the whole weight of the block is reduced, and the sulfonated melamine formaldehyde resin can ensure that the block materials are combined more tightly, thereby being helpful for improving the strength.
At the inside reinforcing frame that increases of building block, the polyurethane heat conductivity is extremely low, has not only increased the heat insulating ability, has still improved the bulk strength of building block, the foam can be followed the through-hole inflation on the reinforcing frame and go out, during the material of foam form can permeate the pore of building block, with building block face zonulae occludens on every side, reinforcing frame will be very stable like this fixed in the building block, permanent stable performance thereof of exerting, polyurethane foam is similar with the reinforcing frame substrate, therefore the two can zonulae occludens.
In terms of material selection, high-temperature-resistant polyurethane is selected, in terms of process, in the final autoclaved curing process of the building block, the temperature is properly reduced, and the polyurethane frame can always ensure higher strength through material selection and process improvement.
The invention has the beneficial effects that: through the improvement of the manufacturing process, the structural design of the composite material and the selection of the composite material, under the condition of ensuring various excellent performances of the building block, the composite material in the building block can be tightly combined with the building block, and the abnormal sound problem can not occur.
Drawings
The invention is further illustrated with reference to the figures and examples.
Fig. 1 is a schematic structural view of the present invention.
In the figure: 1. the building block comprises a building block body, 2, a reinforcing frame and 3, polyurethane foam.
Detailed Description
Example 1
In figure 1, a composite autoclaved aerated concrete block is shown, wherein: 1. the building block comprises a building block body, 2, a reinforcing frame and 3, polyurethane foam. A reinforcing frame is arranged in the building block body, the reinforcing frame is of a hollow structure, a plurality of through holes are formed in the wall of the reinforcing frame, and polyurethane foam is filled in the reinforcing frame;
the building block body comprises the following raw materials in percentage by mass: 55 parts of fly ash, 15 parts of sulphoaluminate cement, 10 parts of glass fiber, 10 parts of carbon fiber, 10 parts of quartz sand, 12 parts of lime, 8 parts of mica, 6 parts of gypsum, 4 parts of sulfonated melamine formaldehyde resin and 1 part of aluminum powder paste; the reinforcing frame comprises the following raw materials in parts by mass: 20 parts of polytetramethylene ether glycol, 30 parts of high-temperature resistant unsaturated resin, 20 parts of dioctyl azelate, 10 parts of polymethylene polyphenyl polyisocyanate, 5 parts of trimethylolpropane, 3 parts of fumed silica and 5 parts of epoxy octyl stearate, and the polyurethane foam is prepared by stirring, mixing, defoaming in vacuum, pouring into a mold, demolding and curing;
the polyurethane foam raw materials comprise the following components in percentage by mass: 30 parts of polytetramethylene ether glycol, 26 parts of high-temperature resistant unsaturated resin, 16 parts of dioctyl azelate, 8 parts of cyclopentane, 7 parts of trimethylolpropane, 5 parts of fumed silica, 4 parts of octyl epoxy stearate and 1.3 parts of pentamethyl divinyl triamine, and mixing the components and then preparing the high-pressure foaming machine.
The preparation method of the composite autoclaved aerated concrete block comprises the following steps:
(1) respectively grinding the fly ash, the gypsum and the mica to 100 meshes by using a ball mill, crushing the lime by using a crusher until the balance of the lime passing through a square-hole sieve with the fineness of 0.08mm is less than 8% for later use, and adding water into the fly ash, the quartz sand, the mica and the gypsum according to the mass part ratio to prepare slurry, wherein the mass of the water is 0.6 time of the total mass of the fly ash, the quartz sand, the mica and the gypsum;
(2) adding the slurry prepared in the step 1 into a pouring stirrer for stirring, and adding the lime in the mass part ratio during stirring for 15 min; adding the glass fiber and the carbon fiber in the mass portion ratio into the slurry, stirring for 8min, and then standing for 60 min;
(3) adding the sulphoaluminate cement and the sulfonated melamine formaldehyde resin in the mass part ratio into the slurry obtained in the step 2, uniformly stirring, and then sending the mixture into a static curing chamber for static curing for 120min to thicken the mixture to obtain total slurry;
(4) putting the aluminum powder paste into a stirring tank, adding water with the mass 10 times that of the aluminum powder paste, uniformly stirring to obtain aluminum powder liquid, adding the aluminum powder liquid into the total slurry obtained in the step 3, stirring for 5min, and pouring into a mold provided with a plurality of reinforcing frames;
(5) curing the autoclaved aerated concrete in the die in a precuring chamber at 55 ℃ for 6h to form a stable blank, demolding, and cutting according to the required specification to obtain a blank before a kettle;
(6) conveying the blank in front of the autoclave into the autoclave, closing a door of the autoclave, starting to pump low pressure, reducing the pressure in the autoclave to 0.04MPa within 10min, maintaining the pressure for 20min, then starting to boost pressure and raise temperature, increasing the pressure to 3MPa within 40min, raising the temperature to 145 ℃, maintaining the temperature for 35min, then starting to reduce the temperature to 125 ℃, maintaining the temperature for 5h, then reducing the pressure to normal pressure within 12min, then transporting out the block for natural cooling, after cooling, injecting polyurethane foam into a reinforcing frame, transporting out and warehousing, and obtaining the concrete block finished product.
Example 2
1. A reinforced frame is arranged in a building block body, the reinforced frame is of a hollow structure, a plurality of through holes are formed in the wall of the reinforced frame, and polyurethane foam is filled in the reinforced frame;
the building block body comprises the following raw materials in percentage by mass: 60 parts of fly ash, 25 parts of sulphoaluminate cement, 18 parts of glass fiber, 16 parts of carbon fiber, 12 parts of quartz sand, 11 parts of lime, 6 parts of mica, 6 parts of gypsum, 5 parts of sulfonated melamine formaldehyde resin and 1.2 parts of aluminum powder paste; the reinforcing frame comprises the following raw materials in parts by mass: 25 parts of polytetramethylene ether glycol, 26 parts of high-temperature resistant unsaturated resin, 16 parts of dioctyl azelate, 7 parts of trimethylolpropane, 5 parts of fumed silica, 5 parts of epoxy octyl stearate and 10 parts of polymethylene polyphenyl polyisocyanate, and the polyurethane is prepared by stirring, mixing, vacuum defoaming, pouring into a mold, demolding and curing;
the polyurethane foam raw materials comprise the following components in percentage by mass: 25 parts of polytetramethylene ether glycol, 26 parts of high-temperature resistant unsaturated resin, 13 parts of dioctyl azelate, 5 parts of cyclopentane, 8 parts of trimethylolpropane, 3 parts of fumed silica, 4 parts of octyl epoxy stearate and 1.6 parts of pentamethyl divinyl triamine, and mixing the components and then preparing the high-pressure foaming machine.
The building block is prepared by the following steps:
(1) respectively grinding the fly ash, the gypsum and the mica to 100 meshes by using a ball mill, crushing the lime by using a crusher until the balance of the lime passing through a square-hole sieve with the fineness of 0.08mm is less than 8% for later use, and adding water into the fly ash, the quartz sand, the mica and the gypsum according to the mass part ratio to prepare slurry, wherein the mass of the water is 0.6 time of the total mass of the fly ash, the quartz sand, the mica and the gypsum;
(2) adding the slurry prepared in the step 1 into a pouring stirrer for stirring, and adding the lime in the mass part ratio during stirring for 12 min; adding the glass fiber and the carbon fiber in the mass portion ratio into the slurry, stirring for 8min, and then standing for 50 min;
(3) adding the sulphoaluminate cement and the sulfonated melamine formaldehyde resin in the mass part ratio into the slurry obtained in the step 2, uniformly stirring, and then sending the mixture into a static curing chamber for static curing for 160min to thicken the mixture to obtain total slurry;
(4) putting the aluminum powder paste into a stirring tank, adding water with the mass 10 times that of the aluminum powder paste, uniformly stirring to obtain aluminum powder liquid, adding the aluminum powder liquid into the total slurry obtained in the step 3, stirring for 5min, and pouring into a mold provided with a plurality of reinforcing frames;
(5) curing the autoclaved aerated concrete in the die in a precuring chamber at 55 ℃ for 8h to form a stable blank, demolding, and cutting according to the required specification to obtain a blank before a kettle;
(6) conveying the blank in front of the autoclave into the autoclave, closing a door of the autoclave, starting to pump low pressure, reducing the pressure in the autoclave to 0MPa within 15min, maintaining the pressure for 30min, then starting to boost the pressure and heat up, increasing the pressure to 3.2MPa within 45min, raising the temperature to 160 ℃, maintaining the temperature for 30min, then starting to cool down, reducing the temperature to 120 ℃, maintaining the temperature for 4h, then reducing the pressure to normal pressure within 10min, then transporting out the block for natural cooling, after cooling, injecting polyurethane foam into a reinforcing frame, transporting out and warehousing, and obtaining the concrete block finished product.

Claims (2)

1. The composite autoclaved aerated concrete block is characterized in that: a reinforcing frame is arranged in the building block body, the reinforcing frame is of a hollow structure, a plurality of through holes are formed in the wall of the reinforcing frame, and polyurethane foam is filled in the reinforcing frame;
the building block body comprises the following raw materials in percentage by mass: 50-70 parts of fly ash, 10-30 parts of sulphoaluminate cement, 10-20 parts of glass fiber, 10-20 parts of carbon fiber, 10-15 parts of quartz sand, 10-15 parts of lime, 5-10 parts of mica, 5-9 parts of gypsum, 3-7 parts of sulfonated melamine formaldehyde resin and 1-1.5 parts of aluminum paste;
the reinforcing frame comprises the following raw materials in parts by mass: 20-30 parts of polytetramethylene ether glycol, 20-30 parts of high-temperature resistant unsaturated resin, 10-20 parts of dioctyl azelate, 5-8 parts of trimethylolpropane, 3-5 parts of fumed silica, 3-5 parts of epoxy octyl stearate and 5-10 parts of polymethylene polyphenyl polyisocyanate, and the polyurethane is prepared by stirring, mixing, vacuum defoaming, pouring into a mold, demolding and curing;
the polyurethane foam raw materials comprise the following components in percentage by mass: 20-30 parts of polytetramethylene ether glycol, 20-30 parts of high-temperature-resistant unsaturated resin, 10-20 parts of dioctyl azelate, 5-10 parts of cyclopentane, 5-8 parts of trimethylolpropane, 3-5 parts of fumed silica, 3-5 parts of epoxy octyl stearate and 1-2 parts of pentamethyl divinyl triamine, and the high-pressure foaming machine is used for preparing the high-temperature-resistant high-performance epoxy resin.
2. A preparation method of a composite autoclaved aerated concrete block is characterized by comprising the following steps: the method comprises the following steps:
(1) respectively grinding fly ash, gypsum and mica to 80-120 meshes by using a ball mill, crushing lime by using a crusher until the balance of the lime passing through a square-hole sieve with the fineness of 0.08mm is less than 8% for later use, and adding water into the fly ash, the quartz sand, the mica and the gypsum according to the mass part ratio to prepare slurry, wherein the mass of the water is 0.5-0.7 time of the total mass of the fly ash, the quartz sand, the mica and the gypsum;
(2) adding the slurry prepared in the step 1 into a pouring stirrer for stirring, and adding the lime in the mass part ratio during stirring for 10-20 min; adding the glass fiber and the carbon fiber in the mass portion ratio into the slurry, stirring for 5-15min, and then standing for 40-70 min;
(3) adding the sulphoaluminate cement and the sulfonated melamine formaldehyde resin in the mass portion ratio into the slurry obtained in the step 2, uniformly stirring, and then sending the mixture into a static curing chamber for static curing for 180min to thicken the mixture to obtain total slurry;
(4) putting the aluminum powder paste into a stirring tank, adding water which is 7-12 times of the mass of the aluminum powder paste, uniformly stirring to obtain aluminum powder liquid, adding the aluminum powder liquid into the total slurry obtained in the step (3), stirring for 2-6min, and pouring into a mold provided with a plurality of reinforcing frames;
(5) curing the autoclaved aerated concrete in the mold in a pre-curing chamber at 50-60 ℃ for 4-8h to form a stable blank, demolding, and cutting according to the required specification to obtain a blank before a kettle;
(6) conveying the blank in front of the autoclave into the autoclave, starting to pump low pressure after closing a door of the autoclave, reducing the pressure in the autoclave to be not more than 0.05MPa within 10-20min, starting to boost and heat up after maintaining for 20-30min, increasing the pressure to 2-4MPa within 20-60min, increasing the temperature to 140-160 ℃, starting to cool down after maintaining for 30-60min, reducing the temperature to 120-130 ℃, maintaining for 4-6h, reducing the pressure to normal pressure within 10-20min, then carrying out natural cooling of the building block, injecting polyurethane foam into a reinforcing frame after cooling, carrying out and warehousing, and obtaining the concrete building block finished product.
CN201911247008.7A 2019-12-09 2019-12-09 Composite autoclaved aerated concrete block and preparation method thereof Pending CN110776333A (en)

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CN112159187A (en) * 2020-09-04 2021-01-01 上海阜阜建材有限公司 Environment-friendly desulfurized gypsum aerated building block and production process thereof
CN112250331A (en) * 2020-10-30 2021-01-22 重庆市荣昌区新兴建材有限公司 Wallboard adhesive
CN113666769A (en) * 2021-09-08 2021-11-19 内蒙古汇方新型建材有限公司 High-alumina fly ash light autoclaved aerated concrete plate and preparation method thereof

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Publication number Priority date Publication date Assignee Title
CN112159187A (en) * 2020-09-04 2021-01-01 上海阜阜建材有限公司 Environment-friendly desulfurized gypsum aerated building block and production process thereof
CN112250331A (en) * 2020-10-30 2021-01-22 重庆市荣昌区新兴建材有限公司 Wallboard adhesive
CN113666769A (en) * 2021-09-08 2021-11-19 内蒙古汇方新型建材有限公司 High-alumina fly ash light autoclaved aerated concrete plate and preparation method thereof
CN113666769B (en) * 2021-09-08 2022-06-07 内蒙古汇方新型建材有限公司 High-alumina fly ash light autoclaved aerated concrete plate and preparation method thereof

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Application publication date: 20200211