CN115010411B - Heat storage building block and preparation method and application thereof - Google Patents
Heat storage building block and preparation method and application thereof Download PDFInfo
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- CN115010411B CN115010411B CN202210482035.8A CN202210482035A CN115010411B CN 115010411 B CN115010411 B CN 115010411B CN 202210482035 A CN202210482035 A CN 202210482035A CN 115010411 B CN115010411 B CN 115010411B
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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
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G9/00—Cultivation in receptacles, forcing-frames or greenhouses; Edging for beds, lawn or the like
- A01G9/14—Greenhouses
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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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
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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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/46—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with organic materials
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
- C04B41/5022—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with vitreous materials
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/60—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only artificial stone
- C04B41/61—Coating or impregnation
- C04B41/62—Coating or impregnation with organic materials
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/60—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only artificial stone
- C04B41/61—Coating or impregnation
- C04B41/65—Coating or impregnation with inorganic materials
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
- E04B2/02—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls built-up from layers of building elements
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C1/00—Building elements of block or other shape for the construction of parts of buildings
- E04C1/39—Building elements of block or other shape for the construction of parts of buildings characterised by special adaptations, e.g. serving for locating conduits, for forming soffits, cornices, or shelves, for fixing wall-plates or door-frames, for claustra
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C1/00—Building elements of block or other shape for the construction of parts of buildings
- E04C1/39—Building elements of block or other shape for the construction of parts of buildings characterised by special adaptations, e.g. serving for locating conduits, for forming soffits, cornices, or shelves, for fixing wall-plates or door-frames, for claustra
- E04C1/392—Building elements of block or other shape for the construction of parts of buildings characterised by special adaptations, e.g. serving for locating conduits, for forming soffits, cornices, or shelves, for fixing wall-plates or door-frames, for claustra for ventilating, heating or cooling
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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Abstract
The application relates to a heat storage building block and a preparation method and application thereof, comprising the following steps: manufacturing a fly ash base block, wherein the content of fly ash in the fly ash base block is 10-90%; uniformly spreading fiber materials on the upper surface of the fly ash base block; manufacturing phase change material slurry, and paving the phase change material slurry on the upper surface of the fly ash base block and a fiber material to form a phase change material layer, wherein the thickness of the phase change material layer is 2 cm-8 cm, so as to obtain a semi-finished product A; and maintaining the semi-finished product A to obtain the heat storage building block. According to the scheme, the heat absorption layer made of the phase-change material can be arranged on the heat storage building block, so that the heat storage building block can realize a heat storage function and can absorb heat actively, the associativity of the heat absorption layer and the heat storage building block can be improved, and the heat absorption layer is prevented from falling off from the heat storage building block easily.
Description
Technical Field
The application relates to the technical field of coal ash recycling, in particular to a heat storage building block and a preparation method and application thereof.
Background
The fly ash is solid particles formed by decomposing, sintering, melting and cooling ash in coal, has the advantages of fine particles, light weight, large specific surface area, strong water absorption and the like, has chemical components similar to clay, and mainly comprises silicon oxide, aluminum oxide, calcium oxide and the like. According to different calcium contents, the fly ash can be divided into high-calcium fly ash and bottom-calcium fly ash. At present, the fly ash is mainly applied to the construction industry: and (1) producing cement by using fly ash. The application of the fly ash in the cement industry is to be used as an admixture of cement and to be used as a clay component ingredient for producing cement clinker. At present, fly ash cement becomes one of five cement varieties in China; (2) The fly ash is used as the concrete admixture, so that the cement consumption can be reduced, the hydration heat can be reduced, and the impermeability and the corrosion resistance of the concrete can be improved; and (3) the fly ash can be used for making bricks. The compression strength of the coal ash brick can be improved to a certain extent by adding a certain amount of coal ash in the brick making process.
In the prior art, fly ash is generally used for manufacturing heat storage blocks, and although the manufactured heat storage blocks have a heat storage function, the heat absorption capacity is poor, and heat cannot be stored after active heat absorption, so that a heat absorption layer made of a phase change material is desirably arranged on the heat storage blocks, so that the heat storage blocks can realize the heat storage function and can also absorb heat actively. However, the heat absorbing layer is poorly bonded to the heat storage blocks, and the heat absorbing layer is easily detached from the heat storage blocks.
Disclosure of Invention
Accordingly, it is necessary to provide a heat storage block, a method for manufacturing the same, and an application thereof, in order to solve the problems that the heat absorption layer is poor in binding property with the heat storage block and the heat absorption layer is easy to fall off from the heat storage block, and to provide a heat storage block, which can be provided with a heat absorption layer made of a phase change material, so that the heat storage block can realize a heat storage function, can absorb heat actively, can improve the binding property between the heat absorption layer and the heat storage block, and can prevent the heat absorption layer from falling off from the heat storage block easily.
A method for preparing a heat storage block comprises the following steps:
manufacturing a fly ash base block, wherein the content of fly ash in the fly ash base block is 10-90%;
uniformly spreading fiber materials on the upper surface of the fly ash base block;
manufacturing phase change material slurry, and paving the phase change material slurry on the upper surface of the fly ash base block and the fiber material to form a phase change material layer, wherein the thickness of the phase change material layer is 2 cm-8 cm, so as to obtain a semi-finished product A;
and curing the semi-finished product A to obtain the heat storage building block.
Preferably, in the method for manufacturing the heat storage block, the fiber material is at least one of crushed wheat straw, crushed rice straw, crushed corn straw, crushed sorghum straw and glass fiber.
Preferably, in the method for manufacturing a heat storage block, the step of manufacturing a phase change material slurry includes:
and (3) taking phase-change material powder, adding water, and stirring to be pasty to obtain the phase-change material slurry, wherein the water content in the phase-change material slurry is 8-18%.
Preferably, in the method for manufacturing a heat storage block, after the step of laying the phase change material slurry on the upper surface of the fly ash base block and the fiber material, and before the step of curing the semi-finished product a, the method further includes:
the phase change material layer is pressed at a first predetermined pressure for 5 to 7 hours.
Preferably, in the above method for manufacturing a heat storage block, after the step of manufacturing a fly ash base block, before the step of uniformly spreading a fiber material on the upper surface of the fly ash base block, the method further includes:
and forming a groove on the upper surface of the fly ash base block so as to enable the upper surface to be uneven.
Preferably, in the method for manufacturing the heat storage block, the step of manufacturing the fly ash base block includes:
weighing 65 to 75 parts of fly ash, 10 to 20 parts of cement and 20 to 30 parts of aggregate, and mixing and stirring to prepare a premix;
adding water into the premix, and uniformly stirring to obtain a mixture B;
the mixture B is pressed and molded under a second preset pressure to obtain the fly ash base block, and the bottom area of the fly ash base block is more than or equal to 0.5m 2 And the height of the semi-finished product B is more than or equal to 0.5m.
Preferably, in the method for manufacturing a heat storage block, the step of curing the semi-finished product a includes:
placing the semi-finished product A under visible light and maintaining at normal temperature for 6 to 7 days, watering and soaking the semi-finished product A for 3 to 4 times, wherein the water amount is 8kg/m 3 To 10kg/m 3 。
Preferably, in the above method for manufacturing a heat storage block, the step of curing the semi-finished product a further includes:
and after the semi-finished product A is watered and soaked every time, uniformly spraying water on the surface of the semi-finished product A at intervals of 8-10 hours.
A heat storage block is prepared by the preparation method of the heat storage block.
A heat storage building block as above is used for piling up the wall body that forms warmhouse booth.
The technical scheme adopted by the application can achieve the following beneficial effects:
in the heat storage building block and the preparation method and application thereof disclosed by the embodiment of the application, the fiber material is uniformly spread on the upper surface of the fly ash base block, then the phase-change material slurry is spread on the upper surface of the fly ash base block and the fiber material, the phase-change material slurry is fused and connected with the upper surface of the fly ash base block and the fiber material through self weight, and the fiber material, the three are fused and connected. The phase-change material slurry can form a phase-change material layer (heat absorption layer), the heat absorption layer made of the phase-change material can be arranged on the heat storage building block, so that the heat storage building block can realize a heat storage function and can absorb heat actively, the heat absorption capacity of the heat storage building block is improved, and meanwhile, the fiber material can be connected with the fly ash base block and the phase-change material layer in a thread-wise manner, so that the bonding strength of the phase-change material layer and the fly ash base block is improved, and the phase-change material layer is prevented from falling off from the fly ash base block.
Therefore, the heat absorption layer made of the phase-change material can be arranged on the fly ash base block, so that the heat storage building block can realize a heat storage function and can absorb heat actively, the associativity of the heat absorption layer and the fly ash base block can be improved, and the heat absorption layer is prevented from falling off from the fly ash base block easily.
Detailed Description
To facilitate an understanding of the present application, the present application will be described more fully below with reference to the accompanying examples. The preferred embodiments of the present application are given in the examples. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. As used herein, the terms "vertical," "horizontal," "left," "right," "top," "bottom," "top," and the like are for illustrative purposes only and do not represent the only embodiments.
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 application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The embodiment of the application discloses a preparation method of a heat storage building block, which comprises the following steps:
manufacturing a fly ash base block, wherein the content of fly ash in the fly ash base block is 10-90%;
preferably, the fly ash content in the fly ash-based block is > 60%.
Uniformly spreading fiber materials on the upper surface of the fly ash base block;
the spread fiber material does not need to be excessive, and can play a role in adhesion, so that the fiber material is prevented from isolating the fly ash base block and the phase-change material slurry. Preferably, the spread fiber material may be formed in a mesh shape. The fiber material may be resin fiber, glass fiber, or the like.
Manufacturing phase change material slurry, and paving the phase change material slurry on the upper surface of the fly ash base block and the fiber material to form a phase change material layer, wherein the phase change material layer is a heat absorption layer, and the thickness of the phase change material layer is 2 cm-8 cm, so as to obtain a semi-finished product A;
it should be noted that: the fly ash base block is placed on the ground, and the surface of one side, away from the ground, of the fly ash base block is the upper surface of the fly ash base block. After the phase-change material slurry is laid on the upper surface of the fly ash base block and the fiber material, the phase-change material slurry is in fusion connection with the upper surface of the fly ash base block and the fiber material through self weight, and the fiber material, the fly ash base block, the fiber material and the fiber material are in fusion connection, so that the bonding strength is improved. The thickness of the phase change material layer is specifically determined according to the volume of the heat storage building block, when the volume of the heat storage building block is large, the thickness of the phase change material layer can be set to be large, and when the volume of the heat storage building block is small, the thickness of the phase change material layer can be set to be small.
Curing the semi-finished product A for 7 days, namely curing for 6 days by adopting a conventional curing mode, thereby obtaining the heat storage building block.
According to the preparation method of the heat storage building block, the fiber materials are uniformly spread on the upper surface of the fly ash base block, then the phase-change material slurry is spread on the upper surface of the fly ash base block and the fiber materials, the phase-change material slurry is in fusion connection with the upper surface of the fly ash base block and the fiber materials through self weight, and the fiber materials are in fusion connection with the fly ash base block and the fiber materials. The phase-change material slurry can form a phase-change material layer (heat absorption layer), the heat absorption layer made of the phase-change material can be arranged on the heat storage building block, so that the heat storage building block can realize a heat storage function and can absorb heat actively, the heat absorption capacity of the heat storage building block is improved, and meanwhile, the fiber material can be connected with the fly ash base block and the phase-change material layer in a thread-wise manner, so that the bonding strength of the phase-change material layer and the fly ash base block is improved, and the phase-change material layer is prevented from falling off from the fly ash base block.
Therefore, the heat absorption layer made of the phase-change material can be arranged on the fly ash base block, so that the heat storage building block can realize a heat storage function and can absorb heat actively, the associativity of the heat absorption layer and the fly ash base block can be improved, and the heat absorption layer is prevented from falling off from the fly ash base block easily.
In order to further improve the bonding strength between the phase change material layer and the fly ash base block, in an alternative embodiment, after the step of laying the phase change material slurry on the upper surface of the fly ash base block and the fiber material, and before the step of curing the semi-finished product a, the preparation method may further include: the phase change material layer is pressed at a first predetermined pressure for 5 to 7 hours. The phase-change material slurry and the fly ash base block are extruded to enable the phase-change material slurry and the fly ash base block to be mutually permeated, so that the phase-change material slurry and the fly ash base block can be better combined, and the bonding strength of the phase-change material layer and the fly ash base block is further improved. The first preset pressure may be 10MPa to 15MPa.
Optionally, after the step of manufacturing the fly ash base block, before uniformly spreading the fiber material on the upper surface of the fly ash base block, the manufacturing method may further include: the grooves are formed in the upper surface of the coal ash base block, so that the upper surface is uneven, the uneven upper surface can enlarge the bonding surface of the phase change material slurry and the coal ash base block, the bonding surface of the phase change material slurry and the coal ash base block is larger, and the bonding strength of the phase change material layer and the coal ash base block can be further improved.
As described above, the fiber material may be resin fiber or glass fiber, and optionally, the fiber material may also be at least one of crushed wheat straw, crushed rice straw, crushed corn straw and crushed sorghum straw. The cost of the crushed wheat straw, crushed rice straw, crushed corn straw, crushed sorghum straw and glass fiber is low, and the cost of the heat storage building block can be effectively reduced.
Preferably, the phase change material slurry preparing step may include: and (3) taking the phase-change material powder, adding water, and stirring to be pasty to obtain phase-change material slurry, wherein the water content in the phase-change material slurry is 8-18%. Through the water content in the restriction phase change material thick liquids, prevent that the water content in the phase change material thick liquids is too high, lead to the phase change material thick liquids to be rare form, prevent that the water content in the phase change material thick liquids from crossing low excessively, lead to the phase change material thick liquids to be flocculent to be convenient for lay the phase change material thick liquids on the upper surface and the fiber material of fly ash base block, in order to conveniently set up the phase change material layer. The phase-change material powder can be FTC self-control phase-change energy-saving material, and the application does not limit the material.
Preferably, the step of making the fly ash base block may comprise: weighing 65 to 75 parts of fly ash, 10 to 20 parts of cement and 20 to 30 parts of aggregate, and mixing and stirring to prepare a premix; adding water into the premix and stirring uniformly to obtain a mixture B; firstly, uniformly mixing raw materials such as fly ash, cement, aggregate and the like, then adding water and stirring to obtain a mixture B, adding a small amount of water continuously, continuously stirring the premix, stopping adding water when the mixture is flocculent, and continuously stirring for 10 to 15 minutes to obtain the mixture B, wherein the mixture B is flocculent.
Pressing and molding the mixture B under a second preset pressure to obtain a fly ash base block, wherein the bottom area of the fly ash base block is more than or equal to 0.5m 2 And the height of the semi-finished product B is more than or equal to 0.5m. And putting the mixture B into a mold, performing compression molding under a preset pressure, and demolding to obtain a fly ash base block, wherein the shape of the fly ash base block can be a cuboid or a column, which is not limited in the application.
As mentioned above, the mixture B is pressed to form at a second predetermined pressure, which may be 10MPa to 15MPa, in particular, to obtain a fly ash-based block. Under the second preset pressure, the mixture B can be compacted and formed into the fly ash base block, and the heat storage performance of the fly ash base block is not influenced.
The step of curing the semi-finished product a may comprise: curing the semi-finished product A under visible light at normal temperature for 6-7 days, watering and soaking the semi-finished product A for 3-4 times, wherein the water amount is 8kg/m 3 To 10kg/m 3 And obtaining the high-strength fly ash-based heat storage building block. Each watering soaking can last 30 minutes to 50 minutes, and the watering amount and the soaking time of the first watering soaking can be smaller. Specifically, the semi-finished product a can be placed under outdoor sunlight in the daytime and under light at night.
Further, the step of curing the semi-finished product a may further include: after the semi-finished product A is watered and soaked every time, water is uniformly sprayed on the surface of the semi-finished product A every 8 to 10 hours. After maintenance that water is uniformly sprayed on the surface of the semi-finished product A, the surface of the heat storage building block can be smooth, cracks can be prevented from appearing on the surface of the heat storage building block, and the surface is rough, so that the appearance of the heat storage building block is high.
As mentioned above, the step of subjecting the semi-finished product a to visible light for 6 days to 7 days, and in a preferred embodiment, the step of subjecting the semi-finished product a to visible light for 6 days to 7 days may include: and (5) placing the semi-finished product A under visible red light and curing at normal temperature for 6 to 7 days. Compared with normal-temperature curing under visible light, the normal-temperature curing of the semi-finished product A under red light can obviously improve the strength of the heat storage building block, further improve the strength of the heat storage building block and prevent damage in the processes of clamping, carrying and stacking walls.
Specifically, the step of curing the semi-finished product a under visible red light at normal temperature for 6 days to 7 days may include: and paving a red transparent substrate on the surface of the semi-finished product A, and curing for 6 to 7 days at normal temperature under visible light. Under the filtering action of the red transparent substrate, when visible light irradiates the red transparent substrate, the red light in the visible light penetrates through the red transparent substrate and irradiates the surface of the semi-finished product A, and the step of normal-temperature maintenance of the semi-finished product A under the visible red light is completed.
Preferably, the water content in the mixture B can be 20-30%, so that the flocculent mixture B can be obtained conveniently, the problem that the flocculent mixture B cannot be obtained due to too high or too low water content is avoided, and the forming and heat storage performance of the fly ash base block is not influenced.
Preferably, the aggregate can comprise construction waste, the particle size of the construction waste is less than or equal to 2mm, the construction waste is used as the aggregate in the fly ash base block, and solid waste is fully utilized, so that the content of solid waste in the heat storage building block is higher, the utilization rate of the solid waste is improved, the heat storage building block is environment-friendly and economical, and the economic benefit is higher.
The embodiment mainly improves and limits the components of the mixture B and the maintenance method of the semi-finished product A, the strength of the heat storage building blocks can be increased while the content of fly ash in the heat storage building blocks is improved, the sizes of the heat storage building blocks are large, the heat storage building blocks are prevented from being easily damaged in the clamping and carrying process, and meanwhile, in the wall building and piling process, the pressure bearing capacity of the heat storage building blocks at the bottom layer is good, the heat storage building blocks are prevented from being easily damaged, the stability of a wall body is improved, the heat storage building blocks with large sizes can quickly complete a wall building task, and the wall building speed is favorably improved. The heat storage building block prepared by the preparation method of the heat storage building block disclosed by the application has the advantages of higher fly ash content, higher strength and large size, and can solve the problem that the building block with larger size and weight is easy to damage in the clamping, carrying and wall building accumulation processes due to the lower strength of the heat storage building block with higher fly ash content in the prior art.
In order to further improve the strength of the heat storage building block, optionally, the step of weighing 65 parts to 75 parts of fly ash, 10 parts to 20 parts of cement and 20 parts to 30 parts of aggregate, and mixing and stirring to prepare the premix may include: weighing 65 to 75 parts of fly ash, 10 to 20 parts of cement, 20 to 30 parts of aggregate and 1 to 3 parts of cellulose, and mixing and stirring to prepare the premix. In this embodiment, the addition of cellulose enables the cellulose to serve as a bonding function in the mixture B, thereby further improving the strength of the heat storage block. Specifically, the length of the cellulose may be 10 cm to 20 cm.
Preferably, the cellulose can be at least one of crushed wheat straw, crushed rice straw, crushed corn straw, crushed sorghum straw and glass fiber, the cost of the crushed wheat straw, crushed rice straw, crushed corn straw, crushed sorghum straw and glass fiber is low, the cost of the heat storage building block can be effectively reduced, and the crushed wheat straw, crushed rice straw, crushed corn straw, crushed sorghum straw and glass fiber have a strong bonding and connecting effect in the mixture B.
The application also discloses a heat storage building block, by the above the preparation method of heat storage building block make, in the heat storage building block, the phase change material layer, fly ash foundation block and fiber material three realize fusing the connection, so that the heat storage building block can enough realize the heat storage function, also can initiatively absorb heat, improve the heat absorption capacity of heat storage building block, and simultaneously, fiber material can connect fly ash foundation block and phase change material layer with the ten thousand ways as usual, thereby improve the bonding strength of phase change material layer and fly ash foundation block, avoid the phase change material layer to drop from the fly ash foundation block.
The application still discloses a heat accumulation building block as above be used for piling up the wall body that forms warmhouse booth, wherein the phase change material layer of heat accumulation building block inclines towards the warmhouse booth, when the sun shines daytime, sunshine sees through the warmhouse booth and shines to the phase change material layer, the phase change material layer initiative heat absorption and with the absorptive heat transfer to the fly ash basic block in, with the storage heat, treat the night-time, the temperature decline in the warmhouse booth, heat release in the fly ash basic block is to the warmhouse booth in, play heat retaining effect, it is lower to prevent that the warmhouse booth internal temperature.
The technical solutions and technical effects of the present application are further described below by specific comparative experimental examples, which are only for further explaining the present application and do not limit the technical solutions of the present application.
The following comparative experiments were set up:
experimental example 1: manufacturing a fly ash base block, wherein the content of fly ash in the fly ash base block is 50%; manufacturing phase change material slurry, and paving the phase change material slurry on the upper surface of the fly ash base block to form a phase change material layer, wherein the thickness of the phase change material layer is 5cm, so as to obtain a semi-finished product A, and the size of the semi-finished product A is 100cm multiplied by 50cm; and curing the semi-finished product A to obtain the heat storage building block.
Experimental example 2: manufacturing a fly ash base block, wherein the content of fly ash in the fly ash base block is 50%; manufacturing phase change material slurry, and paving the phase change material slurry on the upper surface of the fly ash base block to form a phase change material layer, wherein the thickness of the phase change material layer is 5cm, so as to obtain a semi-finished product A, and the size of the semi-finished product A is 100cm multiplied by 50cm; pressing the phase change material layer at a pressure of 10MPa, and maintaining for 5 hours; and curing the semi-finished product A to obtain the heat storage building block.
Experimental example 3: manufacturing a fly ash base block, wherein the content of fly ash in the fly ash base block is 50%; uniformly spreading fiber materials on the upper surface of the fly ash base block; manufacturing phase change material slurry, and paving the phase change material slurry on the upper surface of the fly ash base block and the fiber material to form a phase change material layer, wherein the thickness of the phase change material layer is 5cm, so as to obtain a semi-finished product A, and the size of the semi-finished product A is 100cm multiplied by 50cm; and curing the semi-finished product A to obtain the heat storage building block.
Experimental example 4: manufacturing a fly ash base block, wherein the content of fly ash in the fly ash base block is 50%; uniformly spreading fiber materials on the upper surface of the fly ash base block; manufacturing phase change material slurry, and paving the phase change material slurry on the upper surface of the fly ash base block and the fiber material to form a phase change material layer, wherein the thickness of the phase change material layer is 5cm, so as to obtain a semi-finished product A, and the size of the semi-finished product A is 100cm multiplied by 50cm; pressing the phase change material layer at a pressure of 10MPa, and maintaining for 5 hours; and curing the semi-finished product A to obtain the heat storage building block.
Test mode 1: the heat storage building blocks obtained in the experimental examples 1 to 4 are subjected to drop test, and whether the phase change material layer is separated from the fly ash foundation block or not and whether the phase change material layer is layered or not are observed;
test mode 2: firstly, fixing the heat storage building blocks obtained in the experimental examples 1 to 4 on the ground through the fly ash foundation block, then clamping and hoisting the phase change material layer to pull upwards, recording the upward pulling force, stopping pulling upwards when the pulling force is greater than 6000N, maintaining, recording the maintaining time, and finishing the test when the maintaining time is greater than 10 minutes.
The experimental results are given in the following table:
as can be seen from the above-mentioned experimental results, in experimental example 2 and experimental example 3, compared with experimental example 1, it is found that the bonding strength between the phase change material layer and the fly ash base block can be improved by pressing the phase change material layer and increasing the fiber material, and in comparison between experimental example 2 and experimental example 3, it is found that the effect of increasing the bonding strength by increasing the fiber material is significantly higher than the effect of pressing the phase change material layer to improve the bonding strength, and particularly, the scheme as in experimental example 4 can be used to improve the bonding strength between the phase change material layer and the fly ash base block more favorably.
Experimental example 5: manufacturing a fly ash base block, wherein the content of fly ash in the fly ash base block is 50%; uniformly spreading the crushed wheat straw on the upper surface of the coal ash base block; manufacturing phase change material slurry, and paving the phase change material slurry on the upper surface of the fly ash base block and the crushed wheat straw to form a phase change material layer, wherein the thickness of the phase change material layer is 5cm, so as to obtain a semi-finished product A, and the size of the semi-finished product A is 100cm multiplied by 50cm; and curing the semi-finished product A to obtain the heat storage building block.
Experimental example 6: manufacturing a fly ash base block, wherein the content of fly ash in the fly ash base block is 50%; uniformly spreading glass fibers on the upper surface of the fly ash base block; manufacturing phase change material slurry, and paving the phase change material slurry on the upper surface of the fly ash base block and the glass fiber to form a phase change material layer, wherein the thickness of the phase change material layer is 5cm, so as to obtain a semi-finished product A, and the size of the semi-finished product A is 100cm multiplied by 50cm; and curing the semi-finished product A to obtain the heat storage building block.
The results of the experiment are as follows:
as can be seen from the above experimental results, the effect of spreading the glass fiber on the bonding strength is slightly higher than the effect of spreading the pulverized wheat straw on the bonding strength.
Comparative example 1: weighing 70 parts of fly ash and 30 parts of cement, and mixing and stirring to prepare a premix; adding water into the premix, and uniformly stirring to obtain a mixture B; pressing and molding the mixture B under a preset pressure to obtain a fly ash base block, and uniformly spreading fiber materials on the upper surface of the fly ash base block; manufacturing phase change material slurry, and paving the phase change material slurry on the upper surface of the fly ash base block and the fiber material to form a phase change material layer, wherein the thickness of the phase change material layer is 5cm, so as to obtain a semi-finished product A, and the size of the semi-finished product A is 100cm multiplied by 50cm; and then placing the semi-finished product A in a normal-temperature and normal-humidity environment under visible light for curing for 6 days to obtain the heat storage building block.
Comparative example 2: weighing 70 parts of fly ash, 20 parts of cement and 10 parts of aggregate, and mixing and stirring to prepare a premix; adding water into the premix, and uniformly stirring to obtain a mixture B; pressing and molding the mixture B under a preset pressure to obtain a fly ash base block, and uniformly spreading fiber materials on the upper surface of the fly ash base block; manufacturing phase change material slurry, and paving the phase change material slurry on the upper surface of the fly ash base block and the fiber material to form a phase change material layer, wherein the thickness of the phase change material layer is 5cm, so as to obtain a semi-finished product A, and the size of the semi-finished product A is 100cm multiplied by 50cm; and then placing the semi-finished product A in a normal-temperature and normal-humidity environment under visible light for curing for 6 days to obtain the heat storage building block.
Comparative example 3: weighing 70 parts of fly ash, 10 parts of cement and 20 parts of aggregate, and mixing and stirring to prepare a premix; adding water into the premix, and uniformly stirring to obtain a mixture B; pressing and molding the mixture B under a preset pressure to obtain a fly ash base block, and uniformly spreading fiber materials on the upper surface of the fly ash base block; manufacturing phase change material slurry, and paving the phase change material slurry on the upper surface of the fly ash base block and the fiber material to form a phase change material layer, wherein the thickness of the phase change material layer is 5cm, so as to obtain a semi-finished product A, and the size of the semi-finished product A is 100cm multiplied by 50cm; and then placing the semi-finished product A in a normal-temperature and normal-humidity environment under visible light for curing for 6 days to obtain the heat storage building block.
And (3) detecting the strength of the heat storage building block, namely detecting the strength of the fly ash base block.
The results of the comparative experiments are given in the following table:
| strength/MPa | |
| Comparative example 1 | 3.4 |
| Comparative example 2 | 4.1 |
| Comparative example 3 | 4.5 |
As can be seen from the data in the above table, the strength of the heat storage block in comparative example 3 is significantly higher than the strength of the heat storage blocks in comparative examples 1 and 2, which shows that, by improving the components of the heat storage block, the components and the proportional relationship in comparative example 3 can effectively improve the strength of the heat storage block by increasing the aggregate and adjusting the proportions of the fly ash, the cement and the aggregate.
The experiment was carried out using the components and their proportional relationship in comparative example 3, and the following experiment was set up:
experimental example 7: weighing 70 parts of fly ash, 10 parts of cement, 20 parts of aggregate and 3 parts of cellulose, and mixing and stirring to prepare a premix; adding water into the premix and stirring uniformly to obtain a mixture B; pressing and molding the mixture B under a preset pressure to obtain a fly ash base block, and uniformly spreading fiber materials on the upper surface of the fly ash base block; manufacturing phase change material slurry, and paving the phase change material slurry on the upper surface of the fly ash base block and the fiber material to form a phase change material layer, wherein the thickness of the phase change material layer is 5cm, so as to obtain a semi-finished product A, and the size of the semi-finished product A is 100cm multiplied by 50cm; and then placing the semi-finished product A in a normal-temperature and normal-humidity environment under visible light for curing for 6 days to obtain the heat storage building block.
Experimental example 8: weighing 70 parts of fly ash, 10 parts of cement and 20 parts of aggregate, and mixing and stirring to prepare a premix; adding water into the premix, and uniformly stirring to obtain a mixture B; pressing and molding the mixture B under a preset pressure to obtain a fly ash base block, and uniformly spreading fiber materials on the upper surface of the fly ash base block; manufacturing phase change material slurry, and paving the phase change material slurry on the upper surface of the fly ash base block and the fiber material to form a phase change material layer, wherein the thickness of the phase change material layer is 5cm, so as to obtain a semi-finished product A, and the size of the semi-finished product A is 100cm multiplied by 50cm; placing the semi-finished product A under visible light and maintaining at normal temperature for 6 days, during which the semi-finished product A is watered and soakedSoaking for 3 times, and pouring water in an amount of 9kg/m 3 And obtaining the heat storage building block.
Experimental example 9: weighing 70 parts of fly ash, 10 parts of cement, 20 parts of aggregate and 3 parts of cellulose, and mixing and stirring to prepare a premix; adding water into the premix, and uniformly stirring to obtain a mixture B; pressing and molding the mixture B under a preset pressure to obtain a fly ash base block, and uniformly spreading fiber materials on the upper surface of the fly ash base block; manufacturing phase change material slurry, and paving the phase change material slurry on the upper surface of the fly ash base block and the fiber material to form a phase change material layer, wherein the thickness of the phase change material layer is 5cm, so as to obtain a semi-finished product A, and the size of the semi-finished product A is 100cm multiplied by 50cm; curing the semi-finished product A under visible light at normal temperature for 6 days, watering and soaking the semi-finished product A for 3 times, wherein the water amount for each time is 9kg/m 3 And obtaining the heat storage building block.
The results of the experiment are as follows:
| strength/MPa | |
| Comparative example 3 | 4.5 |
| Experimental example 7 | 6.4 |
| Experimental example 8 | 8.3 |
| Experimental example 9 | 11.9 |
As can be seen from the above data, the strength of the thermal storage block in experimental example 7 is significantly higher than that of the thermal storage block in comparative example 3, thereby showing that the improvement of the composition of the thermal storage block can improve the strength of the thermal storage block by adding cellulose to the thermal storage block. The strength of the heat storage block in experimental example 8 was significantly higher than that of the heat storage block in comparative example 3, thus indicating that the strength of the heat storage block can be improved by the maintenance process described above in terms of improvement of the maintenance process of the heat storage block. And compared with experimental example 7, the strength is improved better by improving the curing process alone than by adding cellulose in the heat storage building block alone.
Further, by combining experimental example 7 and experimental example 8 with example 9, it can be found that the strength of the heat storage block of example 9 is significantly higher than that of the heat storage blocks of experimental examples 7 and 8, and the strength is greatly improved, and it can be seen that the strength of the heat storage block can be greatly improved by adding cellulose to the heat storage block and adopting the above curing process.
In the course of conducting experimental example 8, it was occasionally found that a part of the area of the heat storage block was covered with red plastic, and the strength of the area was found to be higher than that of the other areas when the heat storage block was examined, and based on this, the following experimental examples were set for verification.
Experimental example 10: weighing 70 parts of fly ash, 10 parts of cement and 20 parts of aggregate, and mixing and stirring to prepare a premix; adding water into the premix, and uniformly stirring to obtain a mixture B; pressing and molding the mixture B under a preset pressure to obtain a fly ash base block, and uniformly spreading fiber materials on the upper surface of the fly ash base block; manufacturing phase change material slurry, and paving the phase change material slurry on the upper surface of the fly ash base block and the fiber material to form a phase change material layer, wherein the thickness of the phase change material layer is 5cm, so as to obtain a semi-finished product A, and the size of the semi-finished product A is 100cm multiplied by 50cm; curing the semi-finished product A at normal temperature under visible red light for 6 days, watering and soaking the semi-finished product A for 3 times, wherein the water amount for each time is 9kg/m 3 And obtaining the heat storage building block.
Experimental example 11: weighing 70 parts of fly ash, 10 parts of cement, 20 parts of aggregate and 3 parts of cellulose, and mixing and stirring to prepare a premix; adding water into the premix and stirringUniformly stirring to obtain a mixture B; pressing and molding the mixture B under a preset pressure to obtain a fly ash base block, and uniformly spreading fiber materials on the upper surface of the fly ash base block; manufacturing phase change material slurry, and paving the phase change material slurry on the upper surface of the fly ash base block and the fiber material to form a phase change material layer, wherein the thickness of the phase change material layer is 5cm, so as to obtain a semi-finished product A, and the size of the semi-finished product A is 100cm multiplied by 50cm; curing the semi-finished product A at normal temperature under visible red light for 6 days, watering and soaking the semi-finished product A for 3 times, wherein the water amount for each time is 9kg/m 3 And obtaining the heat storage building block.
The results of the experiment are as follows:
| strength/MPa | |
| Experimental example 8 | 8.3 |
| Experimental example 10 | 10.4 |
| Experimental example 9 | 11.9 |
| Experimental example 11 | 13.1 |
As can be seen from the data in the above table, the strength of the heat storage block in experimental example 10 is significantly higher than that of the heat storage block in experimental example 8, and the strength of the heat storage block in experimental example 11 is significantly higher than that of the heat storage block in experimental example 9, which indicates that the strength of the heat storage block can be improved even when cured at room temperature under visible red light.
Experimental example 12: weighing 70 parts of fly ash, 10 parts of cement and 20 parts of aggregate, and mixing and stirring to prepare a premix; adding water into the premix, and uniformly stirring to obtain a mixture B; pressing and molding the mixture B under a preset pressure to obtain a fly ash base block, and uniformly spreading fiber materials on the upper surface of the fly ash base block; manufacturing phase change material slurry, and paving the phase change material slurry on the upper surface of the fly ash base block and the fiber material to form a phase change material layer, wherein the thickness of the phase change material layer is 5cm, so as to obtain a semi-finished product A, and the size of the semi-finished product A is 100cm multiplied by 50cm; curing the semi-finished product A under visible red light at normal temperature for 6 days, watering and soaking the semi-finished product A for 3 times, wherein the water amount is 9kg/m 3 And after the semi-finished product A is watered and soaked every time, uniformly spraying water on the surface of the semi-finished product A every 9 hours to obtain the heat storage building block.
Experimental example 13: weighing 70 parts of fly ash, 10 parts of cement, 20 parts of aggregate and 3 parts of cellulose, and mixing and stirring to prepare a premix; adding water into the premix, and uniformly stirring to obtain a mixture B; pressing and molding the mixture B under a preset pressure to obtain a fly ash base block, and uniformly spreading fiber materials on the upper surface of the fly ash base block; manufacturing phase change material slurry, and paving the phase change material slurry on the upper surface of the fly ash base block and a fiber material to form a phase change material layer, wherein the thickness of the phase change material layer is 5cm, so as to obtain a semi-finished product A, and the size of the semi-finished product A is 100cm multiplied by 50cm; curing the semi-finished product A at normal temperature under visible red light for 6 days, watering and soaking the semi-finished product A for 3 times, wherein the water amount for each time is 9kg/m 3 And after the semi-finished product A is watered and soaked every time, uniformly spraying water on the surface of the semi-finished product A every 9 hours to obtain the heat storage building block.
The results of the experiment are as follows:
| strength/MPa | Degree of surface smoothness | |
| Experimental example 10 | 10.4 | There is a small amount of cracks |
| Experimental example 11 | 13.1 | There is a small amount of cracks |
| Experimental example 12 | 11.6 | Smooth and crack-free |
| Experimental example 13 | 14.3 | Smooth and crack-free |
As can be seen from the above data, the strength of the heat storage block in experimental example 12 was higher than that of the heat storage block in experimental example 10, and the strength of the heat storage block in experimental example 13 was higher than that of the heat storage block in experimental example 11, thereby showing that the strength of the heat storage block can be improved to some extent even by uniformly spraying water onto the surface of the semi-finished product a at intervals during the curing process.
Meanwhile, in the process of detecting the strength of the heat storage building block by workers, the strength is directly observed by eyes and found by touching and the like: the smoothness of the surface of the heat storage block in experimental example 12 was higher than that of the heat storage block in experimental example 10, and the smoothness of the surface of the heat storage block in experimental example 13 was higher than that of the heat storage block in experimental example 11, which indicates that water was uniformly sprayed to the surface of the semi-finished product a at intervals during the curing process, so that the surface of the heat storage block was smooth, cracks were prevented from occurring on the surface of the heat storage block, and the surface was rough, so that the appearance of the heat storage block was high.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (8)
1. A preparation method of a heat storage building block is characterized by comprising the following steps:
manufacturing a fly ash base block, wherein the content of fly ash in the fly ash base block is 50-90%;
uniformly spreading fiber materials on the upper surface of the fly ash base block;
taking phase change material powder, adding water, stirring to be pasty to obtain phase change material slurry, wherein the water content in the phase change material slurry is 8-18%, paving the phase change material slurry on the upper surface of the fly ash base block and the fiber material to form a phase change material layer, pressing the phase change material layer at a first preset pressure for 5-7 hours, wherein the first preset pressure is 10-15 MPa, and the thickness of the phase change material layer is 2-8 cm, so as to obtain a semi-finished product A;
and curing the semi-finished product A to obtain the heat storage building block.
2. The method for producing a heat storage block according to claim 1, wherein the fiber material is at least one of pulverized wheat straw, pulverized rice straw, pulverized corn straw, pulverized sorghum straw, and glass fiber.
3. The method for manufacturing a heat storage block according to claim 1, further comprising, after the step of manufacturing the fly ash base block and before the step of uniformly spreading the fiber material on the upper surface of the fly ash base block:
and forming a groove on the upper surface of the fly ash base block so as to enable the upper surface to be uneven.
4. The method for preparing a heat storage block according to claim 1, wherein the step of making the fly ash-based block comprises the following steps:
weighing 65 to 75 parts of fly ash, 10 to 20 parts of cement and 20 to 30 parts of aggregate, and mixing and stirring to prepare a premix;
adding water into the premix, and uniformly stirring to obtain a mixture B;
the mixture B is pressed and molded under a second preset pressure to obtain the fly ash base block, and the bottom area of the fly ash base block is more than or equal to 0.5m 2 And the height of the semi-finished product B is more than or equal to 0.5m.
5. The method for producing a heat storage block according to claim 1, wherein the step of curing the semi-finished product a includes:
placing the semi-finished product A under visible light and maintaining at normal temperature for 6 to 7 days, watering and soaking the semi-finished product A for 3 to 4 times, wherein the water amount is 8kg/m 3 To 10kg/m 3 。
6. The method for producing a heat storage block according to claim 5, wherein the step of curing the semi-finished product A further comprises:
and after each time of watering and soaking the semi-finished product A, uniformly spraying water on the surface of the semi-finished product A at intervals of 8 to 10 hours.
7. A thermal storage block characterized by being produced by the method for producing a thermal storage block according to any one of claims 1 to 6.
8. A thermal storage block as claimed in claim 7 for use in stacking walls to form a greenhouse.
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