Moistureproof flame-retardant self-insulation building block and preparation method thereof

Abstract

The invention provides a moistureproof flame-retardant self-insulation building block and a preparation method thereof, and is used in the technical field of building materials, the moistureproof flame-retardant self-insulation building block comprises a building block main body, the building block main body comprises a first concrete layer, a first insulation layer, a second concrete layer, a second insulation layer, a third concrete layer and a plurality of connecting rods arranged along the thickness direction of the building block main body; and the surfaces of the first thermal insulation layer and the second thermal insulation layer are coated with flame-retardant layers. The first thermal insulation layer and the second thermal insulation layer are clamped among the first concrete layer, the second concrete layer and the third concrete layer, so that the building block has a good thermal insulation effect, the outer surfaces of the first thermal insulation layer and the second thermal insulation layer are coated with the flame-retardant layers, on one hand, the moisture-proof effect can be achieved, and on the other hand, the flame-retardant effect is achieved; the fireproof effect of the building block is obviously improved; by arranging the connecting rods in the thickness direction, the integrity of the building block is improved, and the rigidity of the building block is enhanced.

Description

Technical Field

[0001] The invention belongs to the technical field of building materials, and in particular relates to a moisture-proof, flame-retardant, self-insulating building block and a preparation method thereof. Background Art

[0002] Thermal insulation blocks are widely used in construction projects due to their light weight, high strength, thermal insulation, sound absorption, energy saving and environmental protection. Existing thermal insulation blocks are difficult to effectively prevent rainwater from entering the insulation layer, resulting in reduced thermal insulation effect. At the same time, since a large amount of welding work is required during the construction process of the construction project, and the existing thermal insulation blocks have insufficient fireproof performance, the thermal insulation materials in the thermal insulation blocks are often accidentally ignited, causing safety accidents. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides a moisture-proof and flame-retardant self-insulating building block and a preparation method thereof, which has good thermal insulation and flame-retardant effects, strong integrity and is easy to construct.

[0004] The technical solution adopted by the present invention is: a moisture-proof, flame-retardant, self-insulating building block, comprising a building block body, wherein the building block body comprises a first concrete layer, a first insulation layer, a second concrete layer, a second insulation layer, a third concrete layer stacked in sequence, and a plurality of connecting rods arranged along the thickness direction of the building block body; the surfaces of the first insulation layer and the second insulation layer are coated with a flame-retardant layer.

[0005] Furthermore, the first concrete layer, the second concrete layer and the third concrete layer are autoclaved aerated concrete.

[0006] Furthermore, the first thermal insulation layer and the second thermal insulation layer are high temperature resistant polystyrene boards.

[0007] Furthermore, the flame retardant layer is an aluminum foil glass fiber cloth flame retardant tape, and the flame retardant layer is adhered to six surfaces of the first thermal insulation layer and the second thermal insulation layer.

[0008] Furthermore, the connecting rod passes through the first thermal insulation layer, the second concrete layer and the second thermal insulation layer, and both ends of the connecting rod are buried in the first concrete layer and the third concrete layer.

[0009] Furthermore, the four side surfaces of the block body are in a concave-convex alternating structure.

[0010] Furthermore, the first thermal insulation layer and the second thermal insulation layer of two adjacent side surfaces of the block body protrude toward the outer sides of the first concrete layer, the second concrete layer and the third concrete layer; the first thermal insulation layer and the second thermal insulation layer of the other two adjacent side surfaces of the block body are recessed toward the inner sides of the first concrete layer, the second concrete layer and the third concrete layer.

[0011] Furthermore, the length of the outer protrusion is greater than the length of the inner recess.

[0012] Furthermore, the surface of the connecting rod is provided with threads.

[0013] Furthermore, the method for preparing the moisture-proof, flame-retardant and self-insulating building block as described in any one of the above items comprises the following steps: preparing a raw material slurry;

[0014] Processing the raw material slurry to form a foaming slurry;

[0015] The foaming slurry is poured into a mold, and after it expands, foams, and is shaped, a brick is formed;

[0016] The surface of the high temperature resistant polystyrene board is coated with aluminum foil, glass fiber cloth and flame retardant tape;

[0017] The high temperature resistant polystyrene board and the brick are connected together by connecting rods to form a block body;

[0018] The block body is placed in a high-temperature and high-pressure autoclave for curing and solidification.

[0019] The block body is cooled and demoulded for curing.

[0020] The advantages and positive effects of the present invention are:

[0021] (1) The present application sandwiches the first insulation layer and the second insulation layer between the first concrete layer, the second concrete layer and the third concrete layer, so that the block has a good insulation effect. The outer surfaces of the first insulation layer and the second insulation layer are covered with a flame retardant layer. The flame retardant layer can, on the one hand, play a moisture-proof role to prevent water vapor from invading the interior of the insulation layer and affecting the insulation effect of the insulation material; on the other hand, it has a flame retardant effect to prevent the insulation material from being accidentally ignited during construction and use, thereby significantly improving the fireproof effect of the block;

[0022] (2) By arranging a plurality of connecting rods in the thickness direction, the first concrete layer, the first thermal insulation layer, the second concrete layer, the second thermal insulation layer and the third concrete layer are connected together, which can ensure that each structural layer is firmly connected, which not only improves the integrity of the block, but also greatly enhances the rigidity of the block to prevent it from being damaged during construction and use.

[0023] (3) The four side surface layers of the main body of the block have a staggered concave-convex structure. When two blocks are connected, the protruding part of one block is inserted into the concave part of the other block, so that the two blocks can be firmly connected, avoiding the formation of through seams when adjacent blocks are connected, thereby improving the thermal insulation effect of the blocks; allowing construction workers to connect adjacent blocks together conveniently and labor-savingly, and the connected blocks are less likely to be relatively displaced and more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of a specific embodiment of the present invention;

[0025] Figure 2 is a cross-sectional schematic diagram of a specific embodiment of the present invention;

[0026] Figure 3 is a side view of a specific embodiment of the present invention;

[0027] Figure 4 It is a schematic diagram of the block main body connection of a specific embodiment of the present invention.

[0028] In the figure:

[0029] 1. The first concrete layer; 2. The first thermal insulation layer; 3. The second concrete layer; 4. The second thermal insulation layer; 5. The third concrete layer; 6. Connecting rods; 7. Flame retardant layer; 8. Mortar. DETAILED DESCRIPTION

[0030] The embodiments of the present invention are described below with reference to the accompanying drawings.

[0031] like Figure 1-Figure 3 As shown, an embodiment of the present invention proposes a moisture-proof, flame-retardant, self-insulating building block, including a building block body, the building block body includes a first concrete layer 1, a first insulation layer 2, a second concrete layer 3, a second insulation layer 4, a third concrete layer 5 stacked in sequence and a plurality of connecting rods 6 arranged along the thickness direction of the building block body; the surfaces of the first insulation layer 2 and the second insulation layer 4 are coated with a flame-retardant layer 7.

[0032] The present application provides a good thermal insulation effect to the building block by sandwiching the first thermal insulation layer 2 and the second thermal insulation layer 4 between the first concrete layer 1, the second concrete layer 3 and the third concrete layer 5. The outer surfaces of the first thermal insulation layer 2 and the second thermal insulation layer 4 are covered with a flame retardant layer 7. The flame retardant layer 7 can, on the one hand, play a moisture-proof role to prevent water vapor from invading the interior of the thermal insulation layer and affecting the thermal insulation effect of the thermal insulation material; on the other hand, it has a flame retardant effect to prevent the thermal insulation layer from being accidentally ignited during construction and use, thereby significantly improving the fireproof effect of the building block; by arranging a plurality of connecting rods 6 in the thickness direction, the first concrete layer 1, the first thermal insulation layer 2, the second concrete layer 3, the second thermal insulation layer 4 and the third concrete layer 5 are connected together, which can ensure that the structural layers are firmly connected, which not only improves the integrity of the building block, but also greatly enhances the rigidity of the building block to prevent it from being damaged during construction and use.

[0033] In the present application, the first concrete layer 1, the second concrete layer 3 and the third concrete layer 5 are autoclaved aerated concrete; specifically, autoclaved aerated concrete is a porous concrete product made from fly ash, lime, cement, gypsum and slag as main raw materials, with appropriate amounts of gas generating agents, regulators and bubble stabilizers added, and is made through processes such as batching, mixing and high-pressure steaming. Autoclaved aerated concrete is not only light in weight and high in strength, but also has good thermal insulation and fire retardant properties. It also provides a technological basis for the formation of the block structure in the present application. First, it is easy to make and cut into shape. It can be initially combined with the first insulation layer 2 and the second insulation layer 4 through the connecting rod 6 before autoclaving and curing, and is firmly bonded to the first insulation layer 2, the second insulation layer 4 and the connecting rod 6 after autoclaving, ensuring the stability and integrity of the block after forming. In addition, the shrinkage rate of the first concrete layer 1, the second concrete layer 3 and the third concrete layer 5 after forming is very low, ensuring that their sizes match the first insulation layer 2 and the second insulation layer 4, so that the block as a whole has good thermal insulation and fire retardant properties.

[0034] Furthermore, the first insulation layer 2 and the second insulation layer 4 are high-temperature resistant polystyrene boards; specifically, the high-temperature resistant polystyrene board in this embodiment is a rigid foam plastic board with continuous closed-cell foaming, which is made by injecting a catalyst, a flame retardant and a stabilizer into a polystyrene resin assisted by a polymer while heating and mixing, and then extruding it. It is an environmentally friendly insulation material with excellent performance; usually the temperature of autoclaved aerated concrete during autoclaving is above 174.5°C and maintained for a certain period of time. The high-temperature resistant polystyrene board has a high temperature resistance of above 200°C, and can maintain stable performance during the autoclaving curing of the first concrete layer 1, the second concrete layer 3 and the third concrete layer 5.

[0035] Furthermore, the flame retardant layer 7 is an aluminum foil and glass fiber cloth flame retardant tape, and the flame retardant layer 7 is pasted on the six surfaces of the first thermal insulation layer 2 and the second thermal insulation layer 4, and the first thermal insulation layer 2 and the second thermal insulation layer 4 are tightly wrapped to ensure that the thermal insulation material is isolated from the external environment and achieve a good fire prevention effect; specifically, the aluminum foil and glass fiber cloth flame retardant tape is composited by coating aluminum foil and glass fiber cloth with a high-performance flame retardant acrylic adhesive with extremely strong adhesion. The aluminum foil and glass fiber cloth flame retardant tape has good high-temperature stability and can maintain its fire prevention performance during the autoclave curing process of the first concrete layer 1, the second concrete layer 3 and the third concrete layer 5; at the same time, the aluminum foil and glass fiber cloth flame retardant tape also has good water vapor barrier properties, which prevents external water vapor from entering the inner side of the blocks during use, and ensures the thermal insulation effect of the first thermal insulation layer 2 and the second thermal insulation layer 4.

[0036] Furthermore, the connecting rod 6 passes through the first insulation layer 2, the second concrete layer 3 and the second insulation layer 4, and both ends thereof are buried in the first concrete layer 1 and the third concrete layer 5. Preferably, the connecting rod 6 is evenly arranged within the stacking range of the first concrete layer 1, the first insulation layer 2, the second concrete layer 3, the second insulation layer 4 and the third concrete layer 5 to ensure the uniformity of the strength of different parts of the block and to play a good role in fixing and connecting.

[0037] Furthermore, the concave-convex structure of the four side surface layers of the block body can achieve a stable connection between the two blocks by inserting the convex part of one block into the concave part of the other block when the two blocks are connected. This arrangement avoids the formation of through seams when adjacent blocks are connected, thereby avoiding the generation of thermal bridges at the connection parts and improving the thermal insulation effect of the blocks. In addition, the connection structure allows construction workers to connect adjacent blocks together conveniently and labor-savingly, and the connected blocks are not prone to relative displacement and are more stable.

[0038] In a specific embodiment, the first insulation layer 2 and the second insulation layer 4 on two adjacent side surfaces of the block body protrude toward the outside of the first concrete layer 1, the second concrete layer 3 and the third concrete layer 5, and the first insulation layer 2 and the second insulation layer 4 on the other two adjacent side surfaces of the block body are recessed toward the inside of the first concrete layer 1, the second concrete layer 3 and the third concrete layer 5; through this design, the protruding parts and the recessed parts are arranged alternately to form a special insulation structure. This staggered structure reduces thermal bridges while increasing the effective area of ​​the insulation layer, making it difficult for heat energy to be conducted and lost through the wall, thereby effectively improving the insulation effect of the block, which is beneficial to reducing the energy consumption of the building and improving the energy-saving and environmental protection effects of the building.

[0039] Furthermore, if Figure 4 As shown, the length of the outer protrusion is greater than the length of the inner recess; when the protruding part of one building block is inserted into the recessed part of another building block, the first insulation layer 2 and the second insulation layer 4 of the two building blocks are in close contact to form a continuous insulation layer; and a gap is formed between the first concrete layer 1, the second concrete layer 3 and the third concrete layer 5 of the two building blocks. By applying waterproof mortar 8 in the gap, not only can the adhesion of the waterproof mortar 8 be maximized to improve the connection strength between adjacent building blocks, but also the waterproof mortar 8 arranged between the first concrete layer 1 and the third concrete layer 5 can fill the joints of the connection parts, forming a closure and isolation of the first insulation layer 2 and the second insulation layer 4 on the inner side; in this way, not only the firm connection between the building blocks is guaranteed, but also the water penetration is more effectively prevented, ensuring that the building blocks maintain a good insulation effect for a long time.

[0040] Furthermore, the surface of the connecting rod 6 is provided with threads to enhance the grip and friction force at the connection parts of the connecting rod 6 and the first concrete layer 1, the second concrete layer 3 and the third concrete layer 5, which can significantly reduce the possibility of the first concrete layer 1 and the third concrete layer 5 falling off the connecting rod 6, thereby making the overall structure of the block more stable.

[0041] The present application also proposes a method for preparing the moisture-proof, flame-retardant, self-insulating building block proposed in the present application, which specifically comprises the following steps:

[0042] S1. Prepare raw material slurry;

[0043] The method includes configuring concrete raw materials according to a set ratio, and stirring the configured raw materials into a uniform slurry through a slurry preparation machine to form a raw material slurry;

[0044] S2, processing the raw material slurry to form a foaming slurry;

[0045] It includes adding a foaming agent into the raw material slurry, generating a large number of fine bubbles through mechanical stirring or chemical reaction to form a foaming slurry;

[0046] S3, pouring the foaming slurry into the mold, and allowing it to expand, foam, and set to form a brick;

[0047] S4. Wrap the surface of the high temperature resistant polystyrene board with aluminum foil, glass fiber cloth and flame retardant tape;

[0048] S5, using connecting rod 6 to connect the high temperature resistant polystyrene board and the brick to form a block body;

[0049] Specifically, the method includes first placing the first insulation layer 2, the second concrete layer 3 and the second insulation layer 4 side by side, passing the connecting rod 6 through the first insulation layer 2, the second concrete layer 3 and the second insulation layer 4 in sequence, and then passing the first concrete layer 1 and the third concrete layer 5 through the two ends of the connecting rod 6 respectively, so that the first concrete layer 1, the first insulation layer 2, the second concrete layer 3, the second insulation layer 4 and the third concrete layer 5 are in close contact with each other.

[0050] S6. Place the main body of the block into a high temperature and high pressure autoclave for curing and solidification.

[0051] The method includes placing the main body of the building block in a shaping mold, and then putting it into a high-temperature and high-pressure autoclave for curing for a certain period of time to solidify the internal structure of the main body of the building block.

[0052] S7, allowing the block body to cool and demould for curing.

[0053] The technical solution of the present application is described in detail below through a specific implementation.

[0054] Embodiment 1

[0055] like Figure 3 , Figure 4 As shown, a moisture-proof flame-retardant self-insulating building block includes a building block body, the building block body includes a first concrete layer 1, a first thermal insulation layer 2, a second concrete layer 3, a second thermal insulation layer 4, a third concrete layer 5 which are stacked in sequence and a connecting rod 6 which is evenly arranged along the thickness direction of the building block body; the overall size of the building block is 615mm×315mm×250mm, wherein the first concrete layer 1, the second concrete layer 3 and the third concrete layer 5 are autoclaved aerated concrete with a specification of 600mm×300mm×70mm, the first thermal insulation layer 2 and the second thermal insulation layer 4 are high-temperature resistant polystyrene boards with a specification of 602mm×302mm×20mm, the first thermal insulation layer 2 and the second thermal insulation layer 4 are coated with a flame-retardant layer 7, and the flame-retardant layer 7 is adhered to the six outer surfaces of the first thermal insulation layer 2 and the second thermal insulation layer 4 using 0.5mm thick aluminum foil glass fiber cloth flame-retardant tape. The connecting rod 6 is a threaded steel bar with a length of 210 mm. A total of 12 connecting rods are provided, and the spacing between two adjacent connecting rods 6 is 120 mm; each connecting rod 6 passes through the first insulation layer 2, the second concrete layer 3 and the second insulation layer 4, and its two ends are buried in the first concrete layer 1 and the third concrete layer 5. The end of the connecting rod 6 is 20 mm away from the outer surface of the first concrete layer 1 and the third concrete layer 5 in the thickness direction.

[0056] On two adjacent side surfaces of the block body, the first thermal insulation layer 2 and the second thermal insulation layer 4 protrude 15 mm toward the outside of the first concrete layer 1, the second concrete layer 3 and the third concrete layer 5; on the other two adjacent side surfaces of the block body, the first thermal insulation layer 2 and the second thermal insulation layer 4 are recessed 13 mm toward the inside of the first concrete layer 1, the second concrete layer 3 and the third concrete layer 5.

[0057] The embodiments of the present invention are described in detail above, but the contents described are only preferred embodiments of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A moisture-proof, flame-retardant, self-insulating building block, characterized by: The invention comprises a block body, wherein the block body comprises a first concrete layer, a first insulation layer, a second concrete layer, a second insulation layer, a third concrete layer and a plurality of connecting rods arranged along the thickness direction of the block body; the surfaces of the first insulation layer and the second insulation layer are coated with a flame retardant layer.

2. The moisture-proof, flame-retardant, self-insulating building block according to claim 1, characterized in that: The first concrete layer, the second concrete layer and the third concrete layer are autoclaved aerated concrete.

3. The moisture-proof, flame-retardant, self-insulating building block according to claim 1 or 2, characterized in that: The first thermal insulation layer and the second thermal insulation layer are high temperature resistant polystyrene boards.

4. The moisture-proof, flame-retardant, self-insulating building block according to claim 3, characterized in that: The flame retardant layer is an aluminum foil glass fiber cloth flame retardant tape, and the flame retardant layer is adhered to six surfaces of the first thermal insulation layer and the second thermal insulation layer.

5. The moisture-proof, flame-retardant, self-insulating building block according to claim 4, characterized in that: The connecting rod passes through the first thermal insulation layer, the second concrete layer and the second thermal insulation layer, and both ends of the connecting rod are buried in the first concrete layer and the third concrete layer.

6. The moisture-proof, flame-retardant, self-insulating building block according to claim 5, characterized in that: The four side surfaces of the building block body are in a concave-convex staggered structure.

7. The moisture-proof, flame-retardant, self-insulating building block according to claim 6, characterized in that: The first thermal insulation layer and the second thermal insulation layer on two adjacent side surfaces of the block body protrude toward the outer sides of the first concrete layer, the second concrete layer and the third concrete layer; the first thermal insulation layer and the second thermal insulation layer on the other two adjacent side surfaces of the block body are recessed toward the inner sides of the first concrete layer, the second concrete layer and the third concrete layer.

8. The moisture-proof, flame-retardant, self-insulating building block according to claim 7, characterized in that: The length of the outer protrusion is greater than the length of the inner recess.

9. The moisture-proof and flame-retardant self-insulating building block according to any one of claims 4 to 8, characterized in that: The surface of the connecting rod is provided with threads.

10. The method for preparing the moisture-proof, flame-retardant, self-insulating building block according to any one of claims 1 to 9, characterized in that: The following steps are involved: Prepare raw material slurry; Processing the raw material slurry to form a foaming slurry; The foaming slurry is poured into a mold, and after it expands, foams, and is shaped, a brick is formed; The surface of the high temperature resistant polystyrene board is coated with aluminum foil, glass fiber cloth and flame retardant tape; The high temperature resistant polystyrene board and the brick are connected together by connecting rods to form a block body; The block body is placed in a high-temperature and high-pressure autoclave for curing and solidification. The block body is cooled and demoulded for curing.

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