Application of foaming cement in non-bearing wall body, non-bearing wall body and construction method of non-bearing wall body

Abstract

The invention belongs to the technical field of building materials, and provides application of foaming cement in a non-bearing wall, the non-bearing wall and a building method of the non-bearing wall. The invention provides application of foaming cement in a non-bearing wall. The foaming cement is used in cooperation with an internal pulling type non-dismantling high-strength concrete fiber formwork. The foam cement is used in cooperation with the internal-pulling type non-dismantling high-strength concrete fiber formwork, and compared with a traditional masonry structure, the internal-pulling type non-dismantling high-strength concrete fiber formwork has the following advantages that the sound insulation effect, the heat preservation effect, the overall performance, the overall strength of a wall body and the like are obviously improved. The process is simple, construction is convenient, labor is saved, meanwhile, the foaming cement contains a large number of pores, the overall strength of the non-bearing wall is guaranteed, and meanwhile the weight of the non-bearing wall is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of building materials, and particularly to an application of foamed cement in non-load-bearing walls, non-load-bearing walls and a building method thereof. Background Art

[0002] At present, non-load-bearing walls (also called partition walls) in buildings and structures usually adopt masonry structures. The masonry structure generally uses aerated concrete blocks or hollow bricks. The disadvantages of traditional masonry structures are poor sound insulation and heat insulation effects, and plastering is required, with many processes, poor effects and high costs. Summary of the Invention

[0003] In view of this, the purpose of the present invention is to provide an application of foamed cement in non-load-bearing walls, non-load-bearing walls and a building method thereof. When the foamed cement of the present invention is applied to non-load-bearing walls, significant improvements are achieved in aspects such as sound insulation effect, heat insulation effect, overall performance, and overall strength of the walls. Moreover, the process is simple, the construction is convenient, and labor is saved. At the same time, the foamed cement contains a large number of pores, which reduces the weight of the non-load-bearing wall while ensuring the overall strength of the non-load-bearing wall.

[0004] In order to achieve the above-mentioned invention purpose, the present invention provides the following technical solutions:

[0005] The present invention provides an application of foamed cement in non-load-bearing walls, and the foamed cement is used in combination with an internal tension type non-removable high-strength concrete fiber formwork.

[0006] The present invention also provides a non-load-bearing wall, which includes an internal tension type non-removable high-strength concrete fiber formwork and foamed cement poured into the cavity of the internal tension type non-removable high-strength concrete fiber formwork.

[0007] Preferably, the foamed cement comprises the following raw materials in parts by weight for preparation:

[0008] 1000 parts of portland cement, 90 - 100 parts of stone powder, 20 - 200 parts of fly ash, 30 - 100 parts of slag powder, 10 - 15 parts of physical foaming agent, and 400 - 500 parts of water.

[0009] Preferably, the particle size of the stone powder is such that the residue on a 45μm square hole sieve is not more than 30%;

[0010] The particle size of the fly ash is such that the residue on a 45μm square hole sieve is 20% - 40%;

[0011] The particle size of the slag powder is such that the residue on a 45μm square hole sieve is not more than 30%.

[0012] Preferably, the physical foaming agent is a polyurethane physical foaming agent.

[0013] Preferably, the method for preparing the foamed cement comprises the following steps:

[0014] Mix portland cement, stone powder, fly ash, slag powder and water to obtain a slurry;

[0015] Mix the slurry with a physical foaming agent and conduct foaming to obtain the foamed cement.

[0016] Preferably, the temperature for foaming is 15 - 20°C and the time is 15 - 30 s.

[0017] The present invention also provides a construction method for the non - load - bearing wall described in the above technical solution, comprising the following steps:

[0018] Set up an internal - tension non - removable high - strength concrete fiber formwork;

[0019] Pour the foamed cement into the cavity of the internal - tension non - removable high - strength concrete fiber formwork and let it solidify;

[0020] After the foamed cement solidifies, lay a slow - release board on the top of the internal - tension non - removable high - strength concrete fiber formwork.

[0021] Preferably, the temperature for solidification is 10 - 20°C.

[0022] Preferably, the slow - release board is a polystyrene granule slow - release board; the thickness of the polystyrene granule slow - release board is 30 - 50 mm.

[0023] The purpose of the present invention is to provide an application of foamed cement in non - load - bearing walls, non - load - bearing walls and their construction methods. When the foamed cement is applied to non - load - bearing walls in the present invention, there are obvious improvements in aspects such as sound insulation effect, heat insulation effect, overall performance, and overall strength of the wall. Moreover, the process is simple, the construction is convenient, and labor is saved. At the same time, the foamed cement contains a large number of pores, which reduces the weight of the non - load - bearing wall while ensuring the overall strength of the non - load - bearing wall. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic structural diagram of the internal - tension non - removable high - strength concrete fiber formwork;

[0025] Figure 2 is a schematic structural diagram of the wall made of the internal - tension non - removable high - strength concrete fiber formwork;

[0026] Figure 3 is a schematic structural diagram of the internal tension member;

[0027] Figure 4 is a schematic structural diagram of the external wall made of the internal - tension non - removable high - strength concrete fiber formwork;

[0028] Figure 5Structural schematic diagram of a corner wall made of the internal tension type non-dismantling high-strength concrete fiber formwork;

[0029] Figure 6 Structural schematic diagram of a non-load-bearing wall provided by the present invention;

[0030] In the figure: 1 - high-strength concrete fiber board, 2 - reinforcing mesh, 3 - internal tension member, 31 - steel plate, 32 - connecting part, 33 - hanging ring, 4 - tie rod, 5 - splicing joint, 6 - integrated thermal insulation exterior wall board, 7 is the internal tension type non-dismantling high-strength concrete fiber formwork, and 8 is foamed cement. Specific implementation mode

[0031] The present invention provides an application of foamed cement in a non-load-bearing wall, and the foamed cement is used in cooperation with an internal tension type non-dismantling high-strength concrete fiber formwork.

[0032] In the present invention, unless otherwise specified, the raw materials used in the present invention are preferably commercially available products.

[0033] In the present invention, the composition of the foamed cement and the structure of the internal tension type non-dismantling high-strength concrete fiber formwork will be described later and will not be elaborated here.

[0034] The present invention also provides a non-load-bearing wall, which includes an internal tension type non-dismantling high-strength concrete fiber formwork and foamed cement poured into the cavity of the internal tension type non-dismantling high-strength concrete fiber formwork.

[0035] In the present invention, the foamed cement includes the following preparation raw materials in parts by weight:

[0036] 1000 parts of portland cement, 90 - 100 parts of stone powder, 20 - 200 parts of fly ash, 30 - 100 parts of mineral powder, 10 - 15 parts of physical foaming agent, and 400 - 500 parts of water.

[0037] In the present invention, the foamed cement includes 1000 parts of portland cement in parts by weight. The strength of the portland cement is preferably 32.5 MPa.

[0038] In the present invention, the foamed cement includes 90 - 100 parts of stone powder in parts by weight. In the present invention, the particle size of the stone powder is preferably such that the residue on a 45μm square hole sieve is not more than 30%.

[0039] In the present invention, the foamed cement includes 20 - 200 parts of fly ash in parts by weight. In the present invention, the particle size of the fly ash is preferably such that the residue on a 45μm square hole sieve is 20% - 40%.

[0040] In the present invention, the foamed cement includes 30 - 100 parts of mineral powder in parts by weight. In the present invention, the particle size of the mineral powder is preferably such that the residue on a 45μm square hole sieve is not more than 30%.

[0041] In the present invention, the foamed cement comprises 10 - 15 parts by weight of a physical foaming agent. In the present invention, the physical foaming agent is preferably a polyurethane physical foaming agent.

[0042] In the present invention, the foamed cement comprises 400 - 500 parts by weight of water.

[0043] In the present invention, the preparation method of the foamed cement preferably comprises the following steps:

[0044] Mix silicate cement, stone powder, fly ash, mineral powder and water to obtain a slurry;

[0045] Mix the slurry and the physical foaming agent and conduct foaming to obtain the foamed cement.

[0046] In the present invention, silicate cement, stone powder, fly ash, mineral powder and water are mixed to obtain a slurry. In the present invention, the mixing is preferably carried out under stirring conditions. The present invention does not specifically limit the rotation speed and time of the stirring, as long as the silicate cement, stone powder, fly ash, mineral powder and water can be fully mixed.

[0047] After obtaining the slurry, in the present invention, the slurry and the physical foaming agent are mixed and foamed to obtain the foamed cement. In the present invention, the temperature of the foaming is preferably 15 - 20 °C, and the time is preferably 15 - 30 s. In the present invention, the foaming is preferably carried out in a foaming machine.

[0048] In the present invention, the inner-pulling type non-detachable high-strength concrete fiber formwork preferably comprises a high-strength concrete fiber board, a reinforcing mesh embedded in the high-strength concrete fiber board, and an inner-pulling member embedded in the high-strength concrete fiber board. A connecting portion protruding from the high-strength concrete fiber board is provided on the inner-pulling member. The inner high-strength concrete fiber formwork and the outer high-strength concrete fiber formwork constituting the building wall are connected by a pull rod, and both ends of the pull rod are respectively connected to the connecting portions on the inner high-strength concrete fiber formwork and the outer high-strength concrete fiber formwork. A splicing opening for splicing and connecting with other high-strength concrete fiber boards is provided at the end of the high-strength concrete fiber board.

[0049] In the present invention, the reinforcing mesh is preferably a wire mesh or a fiber mesh. In the present invention, the wire diameter of the reinforcing mesh is preferably 0.5 mm to 6 mm, and the mesh holes of the reinforcing mesh are preferably rectangular holes with a side length of 10 mm to 300 mm. In the present invention, the internal tension member includes a steel plate and the connecting portion. The steel plate is welded to the wire mesh. The connecting portion is made of a screw rod with a pull ring. One end of the connecting portion is welded to the steel plate, and the other end of the connecting portion protrudes from the high-strength concrete fiber board and is provided with a hanging ring. In the present invention, the thickness of the steel plate is preferably 1 mm to 5 mm. In the present invention, the pull rod is preferably a steel bar with hooks at both ends, and the diameter of the steel bar is preferably 5 mm to 10 mm. In the present invention, the thickness of the high-strength concrete fiber board is preferably 15 mm to 60 mm, and a decorative surface can be provided on the outer surface of the high-strength concrete fiber board.

[0050] In the present invention, the internal tension type non-removable high-strength concrete fiber formwork, as Figures 1 to 3 shown, includes a high-strength concrete fiber board 1, a reinforcing mesh 2 embedded in the high-strength concrete fiber board 1, and an internal tension member 3 embedded in the high-strength concrete fiber board 1. A connecting portion 32 protruding from the high-strength concrete fiber board 1 is provided on the internal tension member 3. The inner high-strength concrete fiber formwork and the outer high-strength concrete fiber formwork constituting the building wall are connected by a pull rod 4, and both ends of the pull rod 4 are respectively connected to the connecting portions 32 on the inner high-strength concrete fiber formwork and the outer high-strength concrete fiber formwork. A splicing port 5 for splicing and connecting with other high-strength concrete fiber boards 1 is provided at the end of the high-strength concrete fiber board 1.

[0051] In this specific embodiment, the reinforcing mesh 2 is a wire mesh or a fiber mesh. The wire diameter of the reinforcing mesh 2 is 0.5 mm to 6 mm, and the mesh holes of the reinforcing mesh 2 are rectangular holes with a side length of 10 mm to 300 mm; the area of the reinforcing mesh 2 is equal to the area of the high-strength concrete fiber board 1.

[0052] In this specific embodiment, the internal tension member 3 includes a steel plate 31 and a connecting portion 32. The steel plate 31 and the wire mesh are welded together by resistance welding. The connecting portion 32 is made of a steel bar. One end of the connecting portion 32 is welded to the steel plate 31, and the other end of the connecting portion 32 protrudes from the high-strength concrete fiber board 1 and is provided with a hanging ring 33.

[0053] In this specific embodiment, the thickness of the steel plate 31 is 1 mm to 5 mm.

[0054] In this specific embodiment, the pull rod 4 is a steel bar with hooks at both ends, and the diameter of the steel bar is 5 mm - 10 mm; the hooks at both ends of the pull rod 4 are cooperatively connected with the hanging rings 33 on the internal tension member 3; the length of the pull rod 4 is determined according to the designed wall thickness.

[0055] In this specific embodiment, the thickness of the high-strength concrete fiber board 1 is 15 mm to 35 mm. The outer surface of the high-strength concrete fiber board 1 can be set as a decorative surface, and the painting can be done according to the requirements of the drawing design.

[0056] In this specific embodiment, the high-strength concrete fiber board 1 needs to use lightweight concrete materials, and the quality is controlled within 1500 kg / cubic meter.

[0057] The specific construction steps of the internal tension type non-dismantling high-strength concrete fiber formwork in the present invention are as follows:

[0058] The already buried high-strength concrete fiber boards 1 are respectively assembled as the inner formwork and the outer formwork, and the tie rods 4 are used for connection. After the formwork is set up according to the dimensions of the design drawings, then pour concrete or pour foamed cement or foamed mortar.

[0059] As Figure 4 shown, when it comes to the construction of the building exterior wall, the thermal insulation exterior wall integrated board 6 with prefabricated and embedded connectors is used. The inner formwork of the exterior wall is set as the high-strength concrete fiber board 1 in this embodiment, and the tie rods 4 are also used to connect the thermal insulation exterior wall integrated board and the high-strength concrete fiber board 1.

[0060] As Figure 5 shown, when it comes to the production of the wall at the corner, the cross-shaped corner wall is assembled by the high-strength concrete fiber boards 1, and then the tie rods 4 are connected between the opposite high-strength concrete fiber boards 1 and then the pouring work is carried out to form the wall.

[0061] The application scenarios of the internal tension type non-dismantling high-strength concrete fiber formwork in the present invention are as follows:

[0062] 1. When the pouring material is concrete: It can be used as the formwork for various walls, columns, beams, slabs, equipment foundations, channels and other structures.

[0063] 2. When the pouring material is foamed mortar or foamed cement: It can be used as the formwork for non-load-bearing walls.

[0064] The present invention also provides a construction method for the non-load-bearing wall described in the above technical solution, including the following steps:

[0065] Set up the internal tension type non-dismantling high-strength concrete fiber formwork;

[0066] Pour the foamed cement into the cavity of the internal tension type non-dismantling high-strength concrete fiber formwork and let it solidify;

[0067] After the foamed cement solidifies, lay the slow-release board on the top of the internal tension type non-dismantling high-strength concrete fiber formwork.

[0068] The present invention provides an internally tensioned non-removable high-strength concrete fiber formwork. The present invention does not specifically limit the operation of the internally tensioned non-removable high-strength concrete fiber formwork, and it can be carried out according to the erection regulations of the internally tensioned non-removable high-strength concrete fiber formwork.

[0069] After erecting the internally tensioned non-removable high-strength concrete fiber formwork, the present invention pours the foamed cement into the cavity of the internally tensioned non-removable high-strength concrete fiber formwork and allows it to solidify.

[0070] In the present invention, the preferred temperature for solidification is 10 - 20°C; the present invention does not specifically limit the solidification time, as long as the foamed cement can be solidified.

[0071] After the foamed cement has solidified, the present invention lays a slow-release board on the top of the internally tensioned non-removable high-strength concrete fiber formwork.

[0072] In the present invention, the slow-release board is preferably a polystyrene granule slow-release board; the thickness of the polystyrene granule slow-release board is preferably 30 - 50 mm.

[0073] Figure 6 It is a schematic structural diagram of the non-load-bearing wall provided by the present invention. In the figure, 4 - tie rod, 7 - internally tensioned non-removable high-strength concrete fiber formwork, 8 - foamed cement.

[0074] The following describes in detail the application of the foamed cement provided by the present invention in non-load-bearing walls, non-load-bearing walls and their construction methods in combination with embodiments, but they should not be construed as limiting the protection scope of the present invention.

[0075] Example 1

[0076] The foamed cement comprises the following preparation raw materials:

[0077] 1000 kg of Portland cement (strength 32.5 MPa), 100 kg of stone powder (residue on a 45 μm square-hole sieve not more than 30%), 200 kg of fly ash (residue on a 45 μm square-hole sieve 20 - 30%), 30 kg of mineral powder (residue on a 45 μm square-hole sieve not more than 30%), 10 kg of polyurethane physical foaming agent, 450 kg of water.

[0078] Use an internally tensioned non-removable high-strength concrete fiber formwork for formwork erection. After reaching the designed height of the non-load-bearing wall, adjust the verticality with a scaffold and control the flatness.

[0079] Mix the above Portland cement, stone powder, fly ash, mineral powder and water evenly to obtain a slurry; add a physical foaming agent to the slurry and foam it in a foaming machine for 20 s to obtain foamed cement.

[0080] The foamed cement is injected into the mold cavity of the supported inner-pull type non-disassembly high-strength concrete fiber formwork through a foaming machine and solidified at 20°C.

[0081] After the foamed cement solidifies, a 50mm thick polystyrene particle slow-release board is laid on top of the inner-pull type non-dismantling high-strength concrete fiber formwork to obtain a non-load-bearing wall.

[0082] Among them, the inner pull type non-disassembly high strength concrete fiber formwork is as follows Figures 1 to 3 As shown, it includes a high-strength concrete fiberboard, a reinforcing mesh embedded in the high-strength concrete fiberboard, and an inner pull piece embedded in the high-strength concrete fiberboard. The inner pull piece is provided with a connection portion protruding from the high-strength concrete fiberboard. The inner layer of high-strength concrete fiber formwork and the outer layer of high-strength concrete fiber formwork constituting the wall of the building are connected by a tie rod, and the two ends of the tie rod are respectively connected to the connection portions on the inner layer of high-strength concrete fiber formwork and the outer layer of high-strength concrete fiber formwork. The ends of the high-strength concrete fiberboard are provided with a splicing opening for splicing with other high-strength concrete fiberboards. Among them, the reinforcing mesh is a steel mesh with a wire diameter of 1.5mm and a mesh of rectangular holes with a side length of 100mm; the inner pull piece includes a steel plate and the connection portion, the steel plate is welded to the steel mesh, the connection portion is made of steel bars, one end of the connection portion is welded to the steel plate, and the other end of the connection portion protrudes from the high-strength concrete fiberboard and is provided with a hanging ring; the thickness of the steel plate is 2.5mm ， The pull rod is a steel bar with hooks at both ends, and the diameter of the steel bar is 8mm; the thickness of the high-strength concrete fiberboard is 30mm.

[0083] Example 2

[0084] The formula of foamed cement is adjusted to: 1000 kg of silicate cement (strength of 32.5 MPa), 91 kg of stone powder (the residue on a 45 μm square hole sieve is not more than 30%), 182 kg of fly ash (the residue on a 45 μm square hole sieve is 20-30%), 91 kg of mineral powder (the residue on a 45 μm square hole sieve is not more than 30%), 11 kg of polyurethane physical foaming agent, and 430 kg of water.

[0085] Other operations are the same as in Example 1.

[0086] Example 3

[0087] The formula of foamed cement is adjusted to: 1000 kg of Portland cement (strength of 32.5 MPa), 100 kg of stone powder (the residue on a 45 μm square hole sieve is not more than 30%), 20 kg of fly ash (the residue on a 45 μm square hole sieve is 20-30%), 100 kg of mineral powder (the residue on a 45 μm square hole sieve is not more than 30%), 12 kg of polyurethane physical foaming agent, and 420 kg of water.

[0088] Other operations are the same as in Example 1.

[0089] Table 1 presents the costs of 1 cubic meter of wall obtained in Examples 1 to 3.

[0090] Costs of 1 cubic meter of wall obtained in Examples 1 to 3 of Table 1.

[0091]

[0092] Comparative Example 1

[0093] Replace the internally pulled non-removable high-strength concrete fiber formwork with a traditional ordinary wood glue formwork.

[0094] Other operations are the same as in Example 1.

[0095] Test the obtained non-load-bearing wall. The weight per unit volume of this load-bearing wall is 600 kg / m 3 ; The cost is 450 yuan per cubic meter.

[0096] Comparative Example 2

[0097] Replace the foamed cement with a 330 cement solution. The specific formula is shown in Table 2.

[0098] Table 2 Wall formula

[0099] Material Unit Weight Cement t 0.33 Stone powder t 0.03 Fly ash t 0.06 Ground granulated blast-furnace slag t 0.03 Foaming agent t 0.0036 Tap water t 0.42

[0100] Other operations are the same as in Example 1.

[0101] Test the obtained non-load-bearing wall. The weight per unit volume of this load-bearing wall is 650 kg / m 3 ; The cost is 393 yuan per cubic meter.

[0102] Decorate the non-load-bearing wall obtained in Example 1. The specific operation is as follows:

[0103] Directly apply paint on the non-load-bearing wall.

[0104] Rub the obtained paint. The results are: no peeling and no color fading; indicating that the adhesion of the paint on this non-load-bearing wall is good and can meet the requirements.

[0105] Decorate the non-load-bearing wall obtained in Example 1. The specific operation is as follows:

[0106] Directly paste decorative boards on the non-load-bearing wall.

[0107] Measure the bonding force of the decorative boards on the non-load-bearing wall. The results are no peeling and no cracks.

[0108] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. Application of foamed cement in non-load-bearing wall, wherein the foamed cement is used in combination with an internally pulled non-removable high-strength concrete fiber formwork.

2. A non-load-bearing wall, characterized in that, It includes an internally pulled non-removable high-strength concrete fiber formwork and foamed cement poured into the cavity of the internally pulled non-removable high-strength concrete fiber formwork.

3. The non-load-bearing wall according to claim 2, characterized in that, The foamed cement comprises the following raw materials for preparation in parts by weight: 1000 parts of portland cement, 90 - 100 parts of stone powder, 20 - 200 parts of fly ash, 30 - 100 parts of slag powder, 10 - 15 parts of physical foaming agent, and 400 - 500 parts of water.

4. The non-load-bearing wall according to claim 3, wherein, The particle size of the stone powder is such that the residue on a 45μm square-hole sieve is not more than 30%; The particle size of the fly ash is such that the residue on a 45μm square-hole sieve is 20% - 40%; The particle size of the slag powder is such that the residue on a 45μm square-hole sieve is not more than 30%.

5. The non-load-bearing wall according to claim 3, characterized in that, The physical foaming agent is a polyurethane physical foaming agent.

6. The non-load-bearing wall according to claim 3, characterized in that, The preparation method of the foamed cement comprises the following steps: Mix portland cement, stone powder, fly ash, slag powder and water to obtain a slurry; Mix the slurry and the physical foaming agent and carry out foaming to obtain the foamed cement.

7. The non-load-bearing wall according to claim 6, wherein The temperature of the foaming is 15 - 20°C and the time is 15 - 30s.

8. The construction method of the non-load-bearing wall according to any one of claims 2 to 7, characterized in that It includes the following steps: Set up the internally pulled non-removable high-strength concrete fiber formwork; Pour the foamed cement into the cavity of the internally pulled non-removable high-strength concrete fiber formwork until it is full and let it solidify; After the foamed cement solidifies, lay a slow-release board on the top of the internally pulled non-removable high-strength concrete fiber formwork.

9. The construction method according to claim 8, characterized in that, The temperature of the solidification is 10 - 20°C.

10. The building method according to claim 8, characterized in that, The slow-release board is a polystyrene particle slow-release board; the thickness of the polystyrene particle slow-release board is 30 - 50mm.

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