CN113773035A - ALC light partition board and preparation method thereof - Google Patents

ALC light partition board and preparation method thereof Download PDF

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Publication number
CN113773035A
CN113773035A CN202111145881.2A CN202111145881A CN113773035A CN 113773035 A CN113773035 A CN 113773035A CN 202111145881 A CN202111145881 A CN 202111145881A CN 113773035 A CN113773035 A CN 113773035A
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parts
alc
cement
agent
gypsum
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洪德明
刘鑫
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Fast Thinking Technology Shanghai Co ltd
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Fast Thinking Technology Shanghai 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
    • C04B28/14—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
    • C04B28/142—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 containing synthetic or waste calcium sulfate cements
    • C04B28/144—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 containing synthetic or waste calcium sulfate cements the synthetic calcium sulfate being a flue gas desulfurization product
    • 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
    • C04B28/145—Calcium sulfate hemi-hydrate with a specific crystal form
    • 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
    • C04B2111/28—Fire resistance, i.e. materials resistant to accidental fires or high temperatures
    • 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
    • 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
    • C04B2111/52—Sound-insulating 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
    • C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/30—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values
    • C04B2201/32—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values for the thermal conductivity, e.g. K-factors
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength

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  • 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)
  • Crystallography & Structural Chemistry (AREA)
  • Porous Artificial Stone Or Porous Ceramic Products (AREA)

Abstract

The invention provides an ALC light partition board and a preparation method thereof, belonging to the field of partition boards and comprising the following components in parts by weight: 30-45 parts of a cementing material, 35-45 parts of fly ash, 15-25 parts of quartz sand, 0.1-5 parts of pre-expanded microspheres, 4-10 parts of aluminum powder and an auxiliary agent, wherein the auxiliary agent comprises 0-0.5 part of a water reducing agent and 0-1 part of an early strength agent. Through the processing scheme of this application, make ALC light partition plate each item performance optimum, have good heat preservation, give sound insulation and A1 level fire prevention.

Description

ALC light partition board and preparation method thereof
Technical Field
The invention relates to the field of partition boards, in particular to an ALC light partition board and a preparation method thereof.
Background
The ALC light partition wall is short for autoclaved concrete and is one of high-performance autoclaved aerated concrete (ALC). ALC is a porous concrete forming plate which is formed by curing fly ash, cement, quicklime, sand, aluminum powder, gypsum and the like serving as main raw materials through high-pressure steam, and the inside of the ALC contains treated reinforcing steel bars so as to increase the strength. The ALC board can be used as a wall material and a roof, and is a novel material with excellent performance.
As early as the 30 s, China began to produce this product and was widely used. The existing ALC preparation method is single, most industrial wastes such as slag, combustion ash or construction waste are utilized, for example, the construction waste is utilized to prepare the ALC wallboard, the construction waste can be utilized after being crushed to 1-3mm, although the method has important significance for environmental protection and achieves the purposes of waste utilization, energy conservation and emission reduction, the dry bulk density is higher and reaches 870 plus material 910Kg/cm3The heat conductivity coefficient is higher; for example, the self-insulation board made of autoclaved aerated concrete, a reinforcement cage and a rock wool board in the reinforcement cage is also a sandwich board in nature, and although the problem that the self-insulation board cannot deform along with the increase of external force in the processing and using processes of a concrete board is solved, the rock wool board embedded in the self-insulation board cannot cover the whole board, and particularly the edge part of the self-insulation board causes poor heat insulation effect.
Disclosure of Invention
Therefore, in order to overcome the disadvantages of the prior art, the present invention provides an ALC lightweight partition board with excellent thermal insulation, sound insulation and a 1-grade fire resistance, which satisfies the strength requirement and optimizes the properties, and a method for preparing the same.
In order to achieve the above purpose, the present invention provides an ALC light partition board, which comprises the following components in parts by weight: 30-45 parts of a cementing material, 35-45 parts of fly ash, 15-25 parts of quartz sand, 0.1-5 parts of pre-expanded microspheres, 4-10 parts of aluminum powder and an auxiliary agent, wherein the auxiliary agent comprises 0-0.5 part of a water reducing agent and 0-1 part of an early strength agent.
In one embodiment, the cementing material is an inorganic cementing material and at least comprises cement, gypsum and quicklime.
In one embodiment, the cement accounts for 25-45% of the mass of the cementing material, the gypsum accounts for 5-15% of the mass of the cementing material, and the quicklime accounts for 10-20% of the mass of the cementing material.
In one embodiment, the cement is at least one of portland cement, ordinary portland cement, portland slag cement, pozzolanic portland cement, fly ash portland cement, composite portland cement, high alumina cement, and sulfoaluminate cement; the gypsum is at least one of high-strength gypsum, building gypsum and calcined gypsum.
In one embodiment, the fineness of the fly ash is class II or class III ash.
In one embodiment, the pre-expanded microspheres are thermoplastic high molecular polymers with hollow structures, the particle size of the pre-expanded microspheres is less than 300 microns, the pre-expanded microspheres are obtained after expandable microspheres are expanded, the expandable microspheres have the particle size of 20-60 microns, the initiation temperature of 90-110 ℃, the foaming peak temperature of 140-160 ℃, and the minimum foaming density of not more than 15kg/m3。
In one embodiment, the expandable microspheres are shells formed by polymers and internally contain volatile expanding agents serving as core agents, the shells are formed by polymerizing monomer mixtures of polymerizable monomers, and the polymerizable monomers are at least one of acrylonitrile, acrylate monomers, acrylamide monomers and acrylic monomers.
In one embodiment, the core agent is a low boiling point hydrocarbon having a boiling point not higher than that of the shell, and the core agent is at least one of n-pentane, isopentane, neopentane, butane, isobutane, hexane, isohexane, neohexane, heptane, isoheptane, octane, isooctane, and petroleum ether.
In one embodiment, the water reducing agent is at least one of a high-performance carboxylic acid water reducing agent, casein, a lignocellulose water reducing agent, a naphthalene water reducing agent and a melamine formaldehyde condensate.
In one embodiment, the early strength agent is at least one of calcium formate or sodium silicate.
The invention also provides a preparation method of the ALC light partition board, which comprises the following steps: s1, straightening and cutting off the steel bars, and welding the straightened and cut steel bars into a steel bar mesh or a mesh cage; s2, obtaining a cementing material, fly ash, quartz sand, pre-expanded microspheres, aluminum powder and an auxiliary agent according to parts by weight, and sequentially mixing the cementing material with the fly ash, the quartz sand, the pre-expanded microspheres, the aluminum powder and the auxiliary agentStirring the materials, fly ash, quartz sand, pre-expanded microspheres, aluminum powder and an auxiliary agent at a high speed, pouring the stirred raw materials into a mold frame to form a blank, wherein the cementing material accounts for 30-45 parts, the fly ash accounts for 35-45 parts, the quartz sand accounts for 15-25 parts, the pre-expanded microspheres account for 0.1-5 parts, the aluminum powder accounts for 4-10 parts, and the auxiliary agent comprises 0-0.5 part of a water reducing agent and 0-1 part of an early strength agent; s3, performing vibration arrangement on the poured mold frame to remove large bubbles generated by pouring; inserting the reinforcing mesh or the mesh cage into the raw materials of the mold frame, and feeding the mold frame into a curing kiln for constant-temperature pre-curing at 34-45 ℃ and 60-80% humidity for 2-8 h; s4, cutting the blank body which is precured to meet the cutting requirement according to the production required size, and feeding the cut blank body into an autoclave curing kettle for high-temperature autoclave curing, wherein the steam pressure is 8 multiplied by 105Pa-15×105Pa, the temperature is 185-210 ℃, the curing time is 6-12h, and the ALC light partition board is obtained after cooling.
Compared with the prior art, the invention has the advantages that: the cement and the gypsum are used as base materials, the pre-expanded microspheres are used as thermal insulation aggregate, the pre-expanded microspheres are thermoplastic high polymer microspheres with hollow structures, excellent fire-resistant and environment-friendly properties are reserved, and the heat conductivity coefficient is further reduced by adding a large amount of the pre-expanded microspheres with the heat conductivity coefficient close to that of air in the ALC light partition wall, so that the excellent thermal insulation property is realized. Moreover, the rebound resilience shell of the pre-expanded microsphere can effectively weaken the transmission of sound so as to achieve the effects of sound insulation and shock absorption; in addition, the density of the pre-expanded microspheres is only 20-40Kg/m3The ALC light partition wall has a certain help effect on the aspect of light weight. The particle size of the pre-expanded microsphere is only dozens of microns, and the pre-expanded microsphere and other fillers can better achieve the optimal gradation in an ALC light partition wall system, so that a certain anti-cracking effect can be achieved; meanwhile, the pre-expanded microspheres can be uniformly distributed in the ALC light partition wall, and the physical properties of the pre-expanded microspheres are favorably improved. The addition of the pre-expanded microspheres can reduce the mixing amount of aluminum powder, so that air bubbles in the ALC light partition board are more uniform, and the improvement of various performance indexes of the ALC light partition board is facilitated; meanwhile, the ALC light partition wall can meet the environmental protection performance required by the government and the public, and does not have the advantages ofContains formaldehyde.
Detailed Description
The following describes embodiments of the present application in detail.
The following description of the embodiments of the present application is provided by way of specific examples, and other advantages and effects of the present application will be readily apparent to those skilled in the art from the disclosure herein. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. The present application is capable of other and different embodiments and its several details are capable of modifications and/or changes in various respects, all without departing from the spirit of the present application. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict. 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 application.
It is noted that various aspects of the embodiments are described below within the scope of the appended claims. It should be apparent that the aspects described herein may be embodied in a wide variety of forms and that any specific structure and/or function described herein is merely illustrative. Based on the present application, one skilled in the art should appreciate that one aspect described herein may be implemented independently of any other aspects and that two or more of these aspects may be combined in various ways. For example, an apparatus may be implemented and/or a method practiced using any number and aspects set forth herein. Additionally, such an apparatus may be implemented and/or such a method may be practiced using other structure and/or functionality in addition to one or more of the aspects set forth herein.
In addition, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, it will be understood by those skilled in the art that the aspects may be practiced without these specific details.
The embodiment of the application provides an ALC light partition plate, including the following parts by weight: 30-45 parts of a cementing material, 35-45 parts of fly ash, 15-25 parts of quartz sand, 0.1-5 parts of pre-expanded microspheres, 4-10 parts of aluminum powder and an auxiliary agent, wherein the auxiliary agent comprises 0-0.5 part of a water reducing agent and 0-1 part of an early strength agent.
In one embodiment, the cementing material is an inorganic cementing material and at least comprises cement, gypsum and quicklime.
In one embodiment, the cement accounts for 25-45% of the mass of the cementing material, the gypsum accounts for 5-15% of the mass of the cementing material, and the quicklime accounts for 10-20% of the mass of the cementing material.
In one embodiment, the cement is at least one of portland cement, portland slag cement, portland pozzolanic cement, portland fly ash cement, composite portland cement, high alumina cement, and sulfoaluminate cement. The silicate cement is a hydraulic cementing material prepared by grinding silicate cement clinker which mainly comprises calcium silicate, less than 5 percent of limestone or granulated blast furnace slag and a proper amount of gypsum, and the early compressive strength is high by mixing the silicate cement clinker and the gypsum with small amount (less than 5 percent) which is not tragic or less. The ordinary portland cement is a hydraulic cementing material prepared by grinding portland cement clinker, 5-20% of mixed material and a proper amount of gypsum, and a large amount of mixed material is added besides the cement clinker and the gypsum, and the mixed material has various varieties and low early compressive strength. The gypsum is at least one of high-strength gypsum (alpha gypsum), building gypsum (beta type semi-hydrated gypsum) and calcined gypsum. The high-strength gypsum is alpha-type hemihydrate gypsum which is generated by steaming dihydrate gypsum under 1.3 atmospheric pressure and 124 ℃ of saturated steam. The building gypsum is semi-hydrated gypsum obtained by heating natural dihydrate gypsum under the drying condition of 107-170 ℃, and the chemical formula of the semi-hydrated gypsum is CaSO4·1/2H2O。
In one embodiment, the silica sand is graded sand. The graded sand is a mixed material obtained by mixing quartz sand (the main component is silicon dioxide) with different particle sizes.
In one embodiment, the fineness of the fly ash is II-grade or III-grade ash, and the technical index of the fly ash meets the requirement of standard JC/T409-2016 fly ash for silicate building products.
In one embodiment, the pre-expanded microspheres are thermoplastic high molecular polymers with hollow structures, the particle size is less than 300 microns, the pre-expanded microspheres are obtained after the expandable microspheres are expanded, the particle size of the expandable microspheres is 20-60 microns, the initiation temperature is 90-110 ℃, the foaming peak temperature is 140-160 ℃, and the minimum foaming density is not more than 15kg/m3。
In one embodiment, the expandable microspheres are shells formed by polymers and internally contain volatile expanding agents serving as core agents, the shells are formed by polymerizing monomer mixtures of polymerizable monomers, and the polymerizable monomers are at least one of acrylonitrile, acrylate monomers, acrylamide monomers and acrylic monomers.
In one embodiment, the core agent is a low boiling point hydrocarbon having a boiling point not higher than that of the shell, and the core agent is at least one of n-pentane, isopentane, neopentane, butane, isobutane, hexane, isohexane, neohexane, heptane, isoheptane, octane, isooctane, and petroleum ether.
The water reducing agent is used for reducing the water consumption to a greater extent in the process of adding water into materials and mixing, and can effectively improve the easy mixing property and physical property of cement. In one embodiment, the water reducing agent is at least one of a high-performance carboxylic acid water reducing agent, casein, a lignocellulose water reducing agent, a naphthalene water reducing agent and a melamine formaldehyde condensate. High-performance carboxylic acid water reducing agents, casein, lignocellulose water reducing agents, naphthalene water reducing agents, melamine formaldehyde condensates and the like are all commercially available reagents.
The early strength agent is used for improving the early bonding strength and the compressive and flexural strength of the material. In one embodiment, the early strength agent is at least one of calcium formate or sodium silicate.
The embodiment of the application also provides a preparation method of the ALC light partition board, which comprises the following steps:
s1, straightening and cutting off the steel bars, and welding the straightened and cut steel bars into a steel bar mesh or a mesh cage; the steel bars can be straightened and cut off by a straightening and cutting machine, and the straightened and cut steel bars are welded into a steel bar net sheet by a multi-head spot welding machine or welded into a net cage by a single-point suspension welding machine; after being treated by the preservative solution and dried by the oven, the net sheet or the net cage is assembled with an assembly frame and a steel chisel, and after the assembly is finished, the net sheet or the net cage is hoisted to a specified position by a chisel insertion crane to wait for subsequent use;
s2, obtaining a cementing material, fly ash, quartz sand, pre-expanded microspheres, aluminum powder and an auxiliary agent according to parts by weight, sequentially stirring the cementing material, the fly ash, the quartz sand, the pre-expanded microspheres, the aluminum powder and the auxiliary agent at a high speed, pouring the stirred raw materials into a mold frame to form a blank, wherein the cementing material is 30-45 parts, the fly ash is 35-45 parts, the quartz sand is 15-25 parts, the pre-expanded microspheres are 0.1-5 parts, the aluminum powder is 4-10 parts, and the auxiliary agent comprises 0-0.5 part of a water reducing agent and 0-1 part of an early strength agent;
s3, performing vibration arrangement on the poured mold frame to remove large bubbles generated by pouring; inserting a reinforcing mesh or a mesh cage into the raw materials of the mold frame, and feeding the mold frame into a curing kiln for constant-temperature pre-curing at 34-45 ℃ and 60-80% humidity for 2-8 h;
s4, cutting the blank body which is precured to meet the cutting requirement according to the production required size, and feeding the cut blank body into an autoclave curing kettle for high-temperature autoclave curing, wherein the steam pressure is 8 multiplied by 105Pa-15×105Pa, the temperature is 185-210 ℃, the curing time is 6-12h, and the ALC light partition board is obtained after cooling.
In one embodiment, the fly ash and the quartz sand are firstly ball-milled by a ball mill, then the ball-milled fly ash is made into slurry and stored in a slurry storage tank, and the quartz sand, the cement and the processed lime are respectively sent to a storage bin for storage.
Compared with the prior art, the invention has the advantages that: the cement and the gypsum are used as base materials, the pre-expanded microspheres are used as thermal insulation aggregate, the pre-expanded microspheres are thermoplastic high polymer microspheres with hollow structures, excellent fire-resistant and environment-friendly properties are reserved, and the heat conductivity coefficient is further reduced by adding a large amount of the pre-expanded microspheres with the heat conductivity coefficient close to that of air in the ALC light partition wall, so that the excellent thermal insulation property is realized. Moreover, the resilient shell of the pre-expanded microspheres can haveEffectively weakening the transmission of sound so as to achieve the effects of sound insulation and shock absorption; in addition, the density of the pre-expanded microspheres is only 20-40Kg/m3The ALC light partition wall has a certain help effect on the aspect of light weight. The particle size of the pre-expanded microsphere is only dozens of microns, and the pre-expanded microsphere and other fillers can better achieve the optimal gradation in an ALC light partition wall system, so that a certain anti-cracking effect can be achieved; meanwhile, the pre-expanded microspheres can be uniformly distributed in the ALC light partition wall, and the physical properties of the pre-expanded microspheres are favorably improved. The addition of the pre-expanded microspheres can reduce the mixing amount of aluminum powder, so that air bubbles in the ALC light partition board are more uniform, and the improvement of various performance indexes of the ALC light partition board is facilitated; meanwhile, the ALC light partition wall can meet the environmental protection performance required by governments and the public, and does not contain formaldehyde.
Experimental equipment: the drying equipment adopts a GFX-9245A type blast drying box of Shanghai modern environmental engineering technology Limited company; the Shanghai modern environmental engineering technology Co., Ltd, HSX-300HC type temperature and humidity regulating box; the compressive strength is tested by a YHS-229WJ-20kN type universal tester of Shanghai Yihuan instruments science and technology Limited; the heat conductivity coefficient is detected by a flat plate method in GB10294, and a contractibility experiment adopts a SP-175 mortar contraction and expansion instrument of Shanghai Rongjida instrument science and technology Limited. The freezing experiment was performed using a Haixin three-door refrigerator model BCD-239WYK 1. The autoclave equipment used a laboratory autoclave, available from zhuchongtai new materials co.
Example one
1. Ball-milling fly ash by a ball mill to prepare 75% aqueous solution;
2. cutting the 4-minute steel bars by a straightening cutter, and welding the steel bars into steel bar meshes with required specifications by a welding machine; and (5) performing anticorrosion treatment on the steel bar mesh and drying the steel bar mesh for later use.
3. Stirring the mortar raw material and a proper amount of water for 8min at the rotating speed of 500 rpm; the mortar raw materials comprise the following raw materials in parts by weight: 25 parts of P.O.42.5 ordinary portland cement, 5 parts of desulfurized gypsum, 10 parts of quick lime, 15 parts of graded sand, 6 parts of aluminum powder, 0.1 part of water reducing agent, 0.45 part of pre-expanded microspheres and 52.26 parts of fly ash slurry (38.45 parts of fly ash by weight).
4. Injecting the uniformly stirred mortar raw material into a die frame, and vibrating by a foaming finishing machine to remove large bubbles; the steel mesh is then inserted into a mold frame, which is precured for 4 hours at 35 ℃ and 65% humidity.
5. Cutting the precured blank according to the production size, and curing the cut blank at high temperature and high pressure at 190 ℃ and vapor pressure of 9 multiplied by 105Pa, and curing for 8 hours.
6. And cooling after curing to obtain a finished product.
In the present application, the preparation methods of examples 2 to 5 were the same as in example 1, except for the ratio of the raw materials. The following table 1 shows different mortar ratios (parts by weight) of the examples.
Figure BDA0003285534560000101
Table 1: examples 1-5 compounding of different raw materials
The installation test of the ALC light partition board of the embodiment is carried out according to the following steps:
1. cleaning up the floating ash on the ground and the top surface, paying off the ground according to the drawing requirements, and well bouncing the horizontal double-sided line of the partition wall. And popping up a vertical line of the vertical surface, returning the ground position line to the position below a top plate or a beam by using a line weight, and then installing a U-shaped steel card at the position of the wire groove according to construction drawing and putting a polystyrene board with the thickness of about 1 cm.
2. The ALC light partition board within the thickness error range is selected, the length of the board is reduced by 20-40mm according to the structural clear height size of a floor, the joint parts of the partition board wall and the top surface, the ground and the wall surface are cleaned, floating ash, sand, soil, crisp skin and the like are cleaned, mortar, concrete blocks and the like protruding out of the wall surface are cleaned, and meanwhile, the board is watered and moistened.
3. Before installation, the plate is firstly typeset in plan view, and the in-place sequence of the plates is firstly listed, so that the embedding of the plates in the vertical direction of the partition wall is reduced and avoided as much as possible, and the bonding quality of the abutted seams is ensured.
4. When the wallboard is installed, the wallboard is sequentially installed from the joint with a wall or a column, adhesives are fully scraped on the side surface (namely a splicing surface) of the wallboard, the board is erected, one person pushes the board on one side, the other person pries the bottom end of the board at the lower end of the board by a crowbar, the board is jacked up and down to be tightly extruded with the board, and then the redundant adhesives between board seams are scraped. The flatness of the wall surface is measured by using a 2m guiding rule and a feeler gauge, the verticality of the plate is checked by using a 2m wire supporting plate, and whether the batten is aligned to a positioning line which is previously bounced on the top surface and the ground is checked. After the error is not found, the crowbar is removed after the crowbar is compacted and compacted from the bottom end by a wood wedge. Before the wall body is bonded with the seam and does not have certain strength, collision vibration is strictly prohibited so as to prevent the slab joint from moving and cracking. The adhesive is prepared for use at any time, and the prepared adhesive needs to be used up within 30 min.
5. And (3) plugging the lower end of the bonded wall body by using 1:2.5 dry and hard cement mortar, removing the wood wedge under the plate after 3 days, and plugging by using the dry and hard cement mortar with the same strength.
6. After the ALC board is completely fixed, before putty is applied, floating ash is firstly cleaned at the joint, the male and female corner joints and the joint between the ALC board and a beam and a column, then 4.0 multiplied by 4.0 square hole glass fiber alkali-resistant mesh cloth is pasted by the putty, and then veneer construction is carried out according to requirements.
The performance tests are carried out on the examples 1-5, wherein the product index reference execution standard is GB/T15762-2020 autoclaved aerated concrete slab, the main performance is GB/T11968-2020 autoclaved aerated concrete block, and the performance test method is GB/T11969-2020 autoclaved aerated concrete performance test method, so as to obtain the comparison data of the main performance indexes of the example and the comparative product in the table 2.
Figure BDA0003285534560000121
Table 2: comparing the main performance indexes of the embodiment with those of the comparative product
As can be seen from the above table, the indexes in the above examples 1-5 all satisfy the regulations in GB/T15762-.
In the ALC light partition board of the embodiment, because a large number of thermoplastic pre-expanded microspheres with excellent resilience are used, the shock absorption and sound insulation performance is excellent, a test piece with the size of 4m × 2.5m × 0.1m is manufactured according to the component proportion in the embodiment example shown in table 1, and according to GB/T19889.3-2005, part 3 of acoustic insulation measurement of acoustic building and building components: the laboratory measurement of the air sound insulation of the building member and GB/T50121-:
air sound insulation single value evaluation quantity: rw(C；Ctr)(dB)
Comparison product 40.7(-3；-6)
Example 1 41.2(-3；-6)
Example 2 43.1(-3；-6)
Embodiment 3 43.2(-3；-6)
Example 4 44.4(-3；-6)
Example 5 47.9(-3；-6)
Table 3: examples 1-5 air Sound insulation Single value evaluation
It can be seen from tables 2 and 3 that after the ALC lightweight partition board is added with the pre-expanded microspheres, the ALC lightweight partition board has higher bonding strength, lower heat conductivity, better sound insulation effect and lower dry density without affecting the flame retardant rating, and has the properties of light weight, sound insulation and shock absorption.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (10)

1. An ALC light partition plate is characterized by comprising the following components in parts by weight: 30-45 parts of a cementing material, 35-45 parts of fly ash, 15-25 parts of quartz sand, 0.1-5 parts of pre-expanded microspheres, 4-10 parts of aluminum powder and an auxiliary agent, wherein the auxiliary agent comprises 0-0.5 part of a water reducing agent and 0-1 part of an early strength agent.
2. The ALC lightweight partition panel of claim 1, wherein the cementitious material is an inorganic cementitious material comprising at least cement, gypsum, quicklime.
3. The ALC lightweight partition board according to claim 2, characterized in that cement is 25-45% by mass of the gelled material, gypsum is 5-15% by mass of the gelled material, and quicklime is 10-20% by mass of the gelled material.
4. The ALC lightweight partition wall panel of claim 3, characterized in that the cement is at least one of portland cement, portland slag cement, pozzolanic portland cement, portland fly ash cement, composite portland cement, high alumina cement, sulphoaluminate cement; the gypsum is at least one of high-strength gypsum, building gypsum and calcined gypsum.
5. The ALC lightweight partition board formulation of claim 1, wherein the fineness of the fly ash is class ii or class iii ash.
6. The ALC lightweight partition board according to claim 1, characterized in that the pre-expanded microsphere is a hollow thermoplastic high polymer with a particle size less than 300 μm, the pre-expanded microsphere is obtained after the expansion of expandable microsphere, the expandable microsphere has a particle size of 20-60 μm, an initiation temperature of 90-110 ℃, a foaming peak temperature of 140-160 ℃, and a minimum foaming density of not more than 15kg/m3。
7. The ALC lightweight partition panel of claim 6, wherein the expandable microspheres are a shell formed of a polymer with a volatile expansion agent encapsulated therein as a core agent, the shell being polymerized from a monomer mixture of polymerizable monomers, the polymerizable monomers being at least one of acrylonitrile, acrylate monomers, acrylamide monomers, and acrylic monomers.
8. The ALC light-weight partition board of claim 7, wherein the core agent is a low boiling point hydrocarbon with a boiling point not higher than that of the shell, and the core agent is at least one of n-pentane, isopentane, neopentane, butane, isobutane, hexane, isohexane, neohexane, heptane, isoheptane, octane, isooctane, and petroleum ether.
9. The ALC light partition board of claim 1, wherein the water reducer is at least one of a high performance carboxylic acid water reducer, casein, a lignocellulosic water reducer, a naphthalene water reducer, and a melamine formaldehyde condensate, and the early strength agent is at least one of calcium formate or sodium silicate.
10. A preparation method of an ALC light partition board is characterized by comprising the following steps:
s1, straightening and cutting off the steel bars, and welding the straightened and cut steel bars into a steel bar mesh or a mesh cage;
s2, obtaining a cementing material, fly ash, quartz sand, pre-expanded microspheres, aluminum powder and an auxiliary agent according to parts by weight, sequentially stirring the cementing material, the fly ash, the quartz sand, the pre-expanded microspheres, the aluminum powder and the auxiliary agent at a high speed, pouring the stirred raw materials into a mold frame to form a blank, wherein the cementing material is 30-45 parts, the fly ash is 35-45 parts, the quartz sand is 15-25 parts, the pre-expanded microspheres are 0.1-5 parts, the aluminum powder is 4-10 parts, and the auxiliary agent comprises 0-0.5 part of a water reducing agent and 0-1 part of an early strength agent;
s3, performing vibration arrangement on the poured mold frame to remove large bubbles generated by pouring; inserting the reinforcing mesh or the mesh cage into the raw materials of the mold frame, and feeding the mold frame into a curing kiln for constant-temperature pre-curing at 34-45 ℃ and 60-80% humidity for 2-8 h;
s4, cutting the blank body which is precured to meet the cutting requirement according to the production required size, and feeding the cut blank body into an autoclave curing kettle for high-temperature autoclave curing, wherein the steam pressure is 8 multiplied by 105Pa-15×105Pa, the temperature is 185-210 ℃, the curing time is 6-12h, and the ALC light partition board is obtained after cooling.
CN202111145881.2A 2021-09-28 2021-09-28 ALC light partition board and preparation method thereof Pending CN113773035A (en)

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