CN215406892U - Autoclaved aerated concrete slab - Google Patents
Autoclaved aerated concrete slab Download PDFInfo
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- CN215406892U CN215406892U CN202120726621.3U CN202120726621U CN215406892U CN 215406892 U CN215406892 U CN 215406892U CN 202120726621 U CN202120726621 U CN 202120726621U CN 215406892 U CN215406892 U CN 215406892U
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Abstract
The utility model relates to the field of autoclaved aerated concrete slabs, and belongs to the field of concrete slabs. The autoclaved aerated concrete slab is of a cuboid structure, air holes are uniformly distributed in the autoclaved aerated concrete slab, a reinforcement cage or a reinforcement net piece is not arranged in the concrete slab, the manufacturing materials only comprise siliceous materials, calcareous materials, gas generation materials and adjusting materials, the slab length of the concrete slab is far shorter than that of the common autoclaved aerated concrete slab, the requirement on mechanical property can be met without arranging reinforcement, the slab quality is small, and the installation and the cutting are convenient. The autoclaved aerated concrete slab provided by the utility model has the advantages that the service life of the slab is prolonged, the manufacturing cost and the comprehensive construction cost are reduced, the manufacturing process is correspondingly simplified, and the requirements of sound insulation, fire prevention and the like of a non-bearing wall can be met.
Description
Technical Field
The utility model relates to the field of concrete slabs, in particular to an autoclaved aerated concrete slab.
Background
The autoclaved aerated concrete slab is a novel lightweight porous building wall material, takes siliceous materials (sand, fly ash and the like) and calcareous materials (lime and cement) as main raw materials, is added with a gas former (aluminum powder and the like), and is prepared by the technical processes of levigating, proportioning, pouring, cutting, autoclaved curing and the like. As the autoclaved aerated concrete block has the advantages of light weight, good heat preservation performance, good sound insulation and absorption performance, processability, fire resistance and the like, the autoclaved aerated concrete block becomes an important raw material of various domestic high-rise building frame structures.
However, the autoclaved aerated concrete slab in the prior art has the following technical defects that the concrete slab needs to be reinforced when being used as a wall body, the reinforcement process is complex, the number of production quality control points of the slab is large, the slab is expensive, the concrete slab is large in size and heavy in weight, mechanical hoisting construction is usually needed, workers are inconvenient to carry during site construction, and the difficulty is large during construction. For example, the chinese patent CN111574172A discloses an autoclaved aerated concrete slab, in which a reinforcing mesh parallel to the slab is pre-embedded, and the preparation process is complicated, so that the manufacturing cost and the construction cost are high, and the bonding strength between the slab and the reinforcing mesh is not high, thereby reducing various mechanical properties of the slab.
In chinese patent document CN104831857A, a precast aerated concrete panel or block is disclosed, which comprises an aerated concrete panel or block, wherein a precast panel protective layer is made of cement fiber board or calcium silicate, and is adhered to the surface of the aerated concrete panel by nails or cementing materials, so as to form the precast aerated concrete panel or block on which the precast panel protective layer is installed. Although no reinforcing steel bars are arranged in the aerated concrete slab, the aerated concrete slab uses a cement fiberboard or a calcium silicate board as a stress material, and the cement fiberboard or the calcium silicate board is equivalent to the reinforcing steel bars arranged in the aerated concrete slab.
For example, chinese patent document CN202227501U discloses an autoclaved aerated composite insulation board, which is a composite board composed of an outer layer, an inner layer and an adhesive material layer bonding the outer layer and the inner layer together, wherein the outer layer is an autoclaved aerated concrete slab with a built-in low density and no reinforcing mesh, the inner layer is a thermal insulation material, the autoclaved aerated concrete slab has a specification size of 600 × 1000 (70-90) mm, the thermal insulation material has a specification size of 600 × 1000 × 10mm, and the thickness of the autoclaved aerated concrete slab is between 80-100 mm. However, the application field of the autoclaved aerated composite insulation board is an externally-adhered insulation material, which is used for solving the insulation problem of beam columns and shear walls.
However, there is no steam pressurized concrete slab in the prior art which is corrosion resistant, fireproof, sound-proof, heat-insulating, meets the mechanical requirement specification and is simple and convenient to install without adding a steel mesh.
Disclosure of Invention
In order to solve the technical problems, the utility model aims to provide the autoclaved aerated concrete slab which is corrosion-resistant, fireproof, soundproof and heat-insulating, does not need to be added with a reinforcing mesh, meets the mechanical requirement specification and is simple and convenient to install, and the autoclaved aerated concrete slab can be realized by adopting a traditional process only by adopting cheap materials.
Specifically, according to a first aspect of the present invention, there is provided a steam pressurized concrete panel, the object being achieved by the following solution:
the autoclaved aerated concrete slab is of a cuboid structure and comprises a front surface, a rear surface, a left side mounting surface, a right side mounting surface, an upper mounting surface and a lower mounting surface, wherein air holes are uniformly distributed in the concrete slab, and the autoclaved aerated concrete slab is characterized in that the concrete slab is 300mm-1400mm in length, 500mm-700mm in width and 75mm-250mm in thickness, a groove is arranged on the center line of the mounting surface on one side of the left side mounting surface and the right side mounting surface of the concrete slab, a boss matched with the groove is arranged on the other side of the left side mounting surface and the right side mounting surface of the concrete slab, the groove and the boss are perpendicular to the upper mounting surface and the lower mounting surface of the concrete slab and respectively and longitudinally penetrate through the side mounting surfaces of the concrete slab, and the cross sections of the groove and the boss are rectangular, trapezoidal or triangular.
Preferably, the concrete slab is 300mm, 600mm, 900mm, 1000mm, 1100mm, 1200mm, 1300mm or 1400mm in length, 500mm, 600mm or 700mm in width and 75mm, 100mm, 125mm, 150mm, 175mm, 200mm, 225mm or 250mm in thickness.
Preferably, the concrete slab is 1200mm in length, 600mm in width and 100mm in thickness.
Preferably, the concrete slab is a porous light silicate building product prepared by the processes of ingredient pouring, air-out and standing, cutting, autoclaved curing and the like.
According to the utility model, because the length of the autoclaved aerated concrete slab is far less than that of the traditional autoclaved aerated concrete slab, and the bending resistance is inversely proportional to the square of the slab length, the mechanical property of the concrete slab prepared by the utility model is not inferior to that of the traditional concrete slab provided with the reinforcing bars, and the test result shows that the mechanical property can also meet the specification requirement.
Preferably, the concrete slab is formed by pouring a mixture of a siliceous material, a calcareous material, a gas generating material and a regulating material, and no steel bar net cage or steel bar net piece is arranged inside the concrete slab.
The siliceous material comprises, by mass, 60-70 parts of a natural siliceous material and/or an artificial volcanic ash siliceous material, wherein the natural siliceous material comprises one or more of vein quartz, powdered quartz, quartzite, quartz sand and the like; the artificial pozzolan siliceous material comprises coal-fired power plant fly ash.
Preferably, the calcareous material accounts for 30-40 parts by mass and comprises one or more of cement, quicklime, water-quenched blast furnace slag and the like.
Preferably, the gas generating material is 0.28-0.32 parts by mass and comprises one or more of crystalline silicon, ferrosilicon, silicon-calcium alloy, aluminum-iron alloy, aluminum-copper alloy, aluminum powder and the like, and preferably the aluminum powder.
Preferably, the adjusting material accounts for 3-6 parts, and comprises a bubble stabilizing material and an autoclaved curing adjusting material in the expansion slurry. The bubble stabilizing material in the expanded slurry comprises one or more of various surfactants, such as a detergent, peregal, oleic acid, and honey locust powder; the autoclaved curing regulating material comprises sodium carbonate and the like.
Preferably, in order to be further suitable for buildings in cold regions, the research and development team of the utility model finds that the aerogel particles are mixed to prepare the high-performance aerogel concrete slab meeting the energy binding requirement in the cold regions by an orthogonal test method, and the specific mixing amounts are that 50% volume mixing amount of the aerogel particles, 0.1% mixing amount of the air entraining agent and 120kg/m mixing amount of quartz sand are adopted3According to the research and development team of the utility model, the high-performance aerogel concrete slab with the volume weight of 800 kg/m can be prepared by the mixing amount, the strength can reach 10.2MPa, the breaking strength can reach 4.3MPa, the breaking ratio is 0.42, the thermal conductivity is 0.095 w/(m.k), and the water absorption is 5.1%.
Preferably, the center line of one of the left and right mounting surfaces of the concrete slab is provided with a groove, the other side of the concrete slab is provided with a boss matched with the groove, the groove and the boss are perpendicular to the upper and lower mounting surfaces and respectively and longitudinally penetrate through the left and right mounting surfaces, the cross sections of the groove and the boss are rectangular, the width of the groove is 2cm-5cm, and the height of the groove and the boss is 2cm-5 cm. The cross sections of the groove and the lug boss can also be trapezoidal, the width of the upper bottom is 2cm-5cm, the width of the lower bottom is 2cm-5cm, and the height is 2cm-5 cm. In addition, the cross-section of the grooves and the bosses can be in other shapes, such as triangular shapes and the like.
The left side and the right side of the front surface of the concrete slab are both provided with first slots along the length direction of the concrete slab, the first slots penetrate the front surface longitudinally, the width is 4cm-6cm, and the height is 0.4cm-0.6 cm; the left side and the right side of the rear surface are both provided with second slots along the plate length direction, the second slots penetrate the rear surface longitudinally, the width is 4cm-6cm, and the height is 0.4cm-0.6 cm.
The utility model has the following beneficial effects:
according to the autoclaved aerated concrete slab, the slab length of the concrete slab is far shorter than that of a common autoclaved aerated concrete slab, the tensile stress and the vertical deformation generated by bending moment are correspondingly reduced according to the square of the length due to the reduction of the slab length, the crack resistance is correspondingly improved, the requirements on mechanical properties and the like can be met without configuring reinforcing steel bars, the quality of the slab is only equivalent to that of a common autoclaved aerated concrete block, the quality of the slab is less than half of that of the common autoclaved aerated concrete slab, and the mechanical properties can also meet the requirements. The concrete slab has the advantages that the area and the quality of the concrete slab are greatly reduced, the concrete slab is convenient to install compared with the common autoclaved aerated concrete slab, the concrete slab is convenient to cut, the concrete slab is not provided with reinforcing steel bars, the situation that the concrete is easy to corrode due to a large number of gaps is avoided, the concrete slab is convenient to cut, and the hidden danger that the reinforcing steel bars are corroded due to the fact that no protective layer exists after the reinforcing steel bars are cut is avoided.
Drawings
Fig. 1 is a perspective view showing an autoclaved aerated concrete panel according to an embodiment of the present invention;
fig. 2 is a schematic cross-sectional view showing an upper installation surface or a lower installation surface of an autoclaved aerated concrete slab according to an embodiment of the present invention;
fig. 3 is a schematic sectional view showing a plurality of autoclaved aerated concrete panels according to an embodiment of the present invention after installation.
Fig. 4 is a perspective view showing an autoclaved aerated concrete panel according to another embodiment of the present invention;
fig. 5 is a schematic cross-sectional view showing an upper or lower mounting surface of an autoclaved aerated concrete panel according to another embodiment of the present invention;
fig. 6 is a schematic sectional view showing a plurality of autoclaved aerated concrete panels according to another embodiment of the present invention after installation.
Fig. 7 is a perspective view showing an autoclaved aerated concrete panel to which still another embodiment of the present invention relates;
fig. 8 is a schematic cross-sectional view showing an upper or lower mounting surface of an autoclaved aerated concrete panel to which still another embodiment of the present invention relates;
fig. 9 is a schematic sectional view showing a plurality of autoclaved aerated concrete panels according to still another embodiment of the present invention after installation.
Detailed Description
The present invention will be described in detail with reference to examples. The following examples will assist those skilled in the art in further understanding the utility model, but are not intended to limit the utility model in any way. It should be noted that it would be apparent to those skilled in the art that several modifications and improvements can be made without departing from the inventive concept; all falling within the scope of the present invention.
Fig. 1, 4 and 7 are respectively perspective views of autoclaved aerated concrete slabs according to three embodiments of the utility model; fig. 2, 5 and 8 are schematic cross-sectional views of an upper mounting surface or a lower mounting surface of an autoclaved aerated concrete slab according to three embodiments of the utility model; fig. 3, 6 and 9 are schematic cross-sectional views of installed multiple autoclaved aerated concrete panels according to three embodiments of the present invention.
As shown in fig. 1, 4 and 7, the utility model provides an autoclaved aerated concrete slab 1, wherein the concrete slab 1 is a cuboid structure and comprises a front surface, a rear surface, a left mounting surface, a right mounting surface, an upper mounting surface and a lower mounting surface, air holes are uniformly distributed in the concrete slab, the length of the concrete slab is 300mm, 600mm, 900mm, 1000mm, 1100mm, 1200mm, 1300mm or 1400mm, the width of the concrete slab is 500mm, 600mm or 700mm, and the thickness of the concrete slab is 75mm, 100mm, 125mm, 150mm, 175mm, 200mm, 225mm or 250 mm.
Preferably the concrete slab is 1200mm in length, 600mm in width and 100mm in thickness.
The concrete slab 1 is not internally provided with a reinforcing cage or a reinforcing mesh, the concrete slab is made of only siliceous materials, calcareous materials, gas generating materials and adjusting materials, and the porous light silicate building product is prepared by the processes of ingredient pouring, gas generating and standing, cutting, autoclaved curing and the like. Because the length of the autoclaved aerated concrete slab is far less than that of the traditional autoclaved aerated concrete slab, the probability of occurrence of internal defects is reduced, the bending resistance is inversely proportional to the square of the slab length, and the test results shown in the following table also show that the mechanical properties of the autoclaved aerated concrete slab can also meet the specification requirements.
Preferably, the siliceous material comprises 60-70 parts by mass of natural siliceous material and/or artificial volcanic ash siliceous material, wherein the natural siliceous material comprises one or more of vein quartz, powdered quartz, quartzite, quartz sand and the like; the artificial pozzolan siliceous material comprises coal-fired power plant fly ash.
Preferably, the calcareous material accounts for 30-40 parts by mass and comprises one or more of cement, quicklime, water-quenched blast furnace slag and the like.
Preferably, the gas generating material is 0.28-0.32 parts by mass and comprises one or more of crystalline silicon, ferrosilicon, silicon-calcium alloy, aluminum-iron alloy, aluminum-copper alloy, aluminum powder and the like, and preferably the aluminum powder.
Preferably, the adjusting material accounts for 3-6 parts, and comprises a bubble stabilizing material and an autoclaved curing adjusting material in the expansion slurry. The bubble stabilizing material in the expanded slurry comprises one or more of various surfactants, such as a detergent, peregal, oleic acid, and honey locust powder; the autoclaved curing regulating material comprises sodium carbonate and the like.
In a preferred embodiment, in order to be further suitable for buildings in cold regions, the research and development team of the utility model finds that the aerogel particles are mixed to prepare the high-performance aerogel concrete slab meeting the energy binding requirement in the cold regions by an orthogonal test method, and the specific mixing amount is that 50% volume mixing amount of the aerogel particles, 0.1% mixing amount of the air entraining agent and 120kg/m mixing amount of quartz sand are adopted3According to the research of the research and development team, the high-performance aerogel concrete slab with the bulk density of 800 kg/m can be prepared and is strongThe degree can reach 10.2MPa, the breaking strength reaches 4.3MPa, the breaking ratio is 0.42, the heat conductivity coefficient is 0.095 w/(m.k), and the water absorption rate is 5.1%. Wherein, the aerogel particles, the air entraining agent and the quartz sand have no great requirements, and the proposal is to adopt the aerogel particles with the particle diameter of 1 mm-5 mm and the bulk density of 120kg/m3～150 kg/m3The super-hydrophobic aerogel particles with the fire-retardant grade of A are added, and the mixing amount of the air-entraining agent is 0.05-0.15% of that of the adhesive material.
It should be noted that the doping amount of the aerogel particles directly affects the folding ratio of the material, the folding ratio increases and then decreases with the increase of the doping amount of the aerogel particles, the folding ratio is the largest when the doping amount of the aerogel particles is 50%, the flexibility of the material is the best, and the doping amount of the aerogel particles is not only 50%. On the other hand, as the mixing amount of the air entraining agent is increased, the water absorption of the material is also improved in a small range, which is unfavorable for the waterproof performance of the material, and when the mixing amount of the air entraining agent is 0.1%, the material is used in the outer enclosure component, and other functions cannot be influenced due to the problem of water absorption. In addition, the thermal conductivity of the high-performance aerogel concrete slab with the density grade of 800 kg/m is only 0.095 w/(m.K), and the thermal resistance is about 18 times that of the common concrete. This enables the preferred embodiment to achieve thermal insulation and energy saving requirements using concrete panels, for example 20cm thick. In addition, the raw materials of the high-performance aerogel concrete slab are A-grade non-combustible materials, so that the high-performance aerogel concrete slab has good fire resistance, is used on buildings, and can further improve the fire resistance of the buildings. In addition, the water absorption rate of the material is only 5.1%, and the material has good integrity and better waterproof performance.
The center line of the right mounting surface of the concrete slab is provided with a groove 2, the left side of the concrete slab is provided with a boss 3 matched with the groove 2 of the other concrete slab when the concrete slab is mounted, the boss 3 protrudes out of the center position of a shoulder 4 of the left mounting surface, the groove 2 and the boss 3 are perpendicular to the upper and lower mounting surfaces and respectively penetrate through the left and right mounting surfaces longitudinally, the cross sections of the groove 2 and the boss 3 are rectangular, the width is 2cm-5cm, and the height is 2cm-5 cm. The cross sections of the groove 2 and the boss 3 can also be trapezoidal, the width of the upper bottom is 2cm-5cm, the width of the lower bottom is 2cm-5cm, and the height is 2cm-5 cm. In addition to this, the cross-section of the grooves 2 and the lands 3 may also be of other shapes, such as triangular, etc.
In a preferred embodiment, two clamping columns 5 (shown in fig. 1, 4 and 7) are symmetrically arranged inside the groove, and correspondingly, two clamping holes (shown in fig. 1, 4 and 7) are arranged at corresponding positions of the boss, so that adjacent concrete slabs are further clamped when the concrete slabs are installed through the matching of the clamping columns and the clamping holes.
The left side and the right side of the front surface of the concrete slab 1 are both provided with first slots 6 and 7 along the length direction of the concrete slab, the first slots 6 and 7 penetrate the front surface longitudinally, the width is 4cm-6cm, and the height is 0.4cm-0.6 cm; the left side and the right side of the rear surface are both provided with second slots 8 and 9 along the plate length direction, the second slots 8 and 9 penetrate the rear surface longitudinally, the width is 4cm-6cm, and the height is 0.4cm-0.6 cm.
As shown in fig. 2 and 5, 301 shows the position of the bottom surface of the groove, 302 shows the position of the bottom surface of the slot 6, 7, 8, 9, and 303 shows the position of the upper land of the boss 3.
Fig. 3, 6 and 9 are sectional views of the concrete slabs after being assembled and spliced.
In the utility model, the corresponding mechanical property tests performed by assembling the three embodiments with different sizes all reach the construction standard. The concrete slab of example 1 has a length of 1200mm, a width of 600mm and a thickness of 100mm, the concrete slab of example 2 has a length of 1000mm, a width of 500mm and a thickness of 100mm, and the concrete slab of example 3 has a length of 1400mm, a width of 700mm and a thickness of 100 mm. The mechanical property parameters of three groups of concrete plates are tested, and the results are shown in the following table:
TABLE 1 mechanical Properties of autoclaved aerated concrete slabs
| Examples | Flexural strength (/ MPa) | Compressive Strength (/ MPa) |
| 1 | 1.3 | 4.1 |
| 2 | 1.4 | 4.3 |
| 3 | 1.2 | 4.0 |
From the test results in table 1, it can be seen that although the autoclaved aerated concrete slab of the utility model has no reinforcing bars, the mechanical properties are excellent and can meet the specification requirements.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as a part of the scope expressed by the present specification.
It will be understood by those skilled in the art that the foregoing examples, while indicating several exemplary embodiments of the utility model, are given by way of illustration and description, but are not to be construed as limiting the scope of the utility model, which is defined by the appended claims.
Claims (8)
1. The autoclaved aerated concrete slab is of a cuboid structure and comprises a front surface, a rear surface, a left side mounting surface, a right side mounting surface, an upper mounting surface and a lower mounting surface, wherein air holes are uniformly distributed in the concrete slab, and the autoclaved aerated concrete slab is characterized in that the concrete slab is 300mm-1400mm in length, 500mm-700mm in width and 75mm-250mm in thickness, a groove is arranged on the center line of the mounting surface on one side of the left side mounting surface and the right side mounting surface of the concrete slab, a boss matched with the groove is arranged on the other side of the left side mounting surface and the right side mounting surface of the concrete slab, the groove and the boss are perpendicular to the upper mounting surface and the lower mounting surface of the concrete slab and respectively and longitudinally penetrate through the side mounting surfaces of the concrete slab, and the cross sections of the groove and the boss are rectangular, trapezoidal or triangular.
2. Autoclaved aerated concrete panel according to claim 1, characterized in that the concrete panel is 300mm, 600mm, 900mm, 1000mm, 1100mm, 1200mm, 1300mm or 1400mm in length, 500mm, 600mm or 700mm in width and 75mm, 100mm, 125mm, 150mm, 175mm, 200mm, 225mm or 250mm in thickness.
3. Autoclaved aerated concrete panel according to claim 2, characterized in that: the concrete slab is 1200mm in length, 600mm in width, and 100mm in thickness.
4. The autoclaved aerated concrete panel according to claim 1, wherein no steel reinforcement cages or steel reinforcement meshes are arranged inside the concrete panel.
5. The autoclaved aerated concrete panel according to claim 1, wherein the cross-section of the grooves and bosses are rectangular, with a width of 2cm to 5cm and a height of 2cm to 5 cm.
6. The autoclaved aerated concrete panel according to claim 1, wherein the cross section of the grooves and the bosses is trapezoidal, the upper bottom width is 2cm to 5cm, the lower bottom width is 2cm to 5cm, and the height is 2cm to 5 cm.
7. The autoclaved aerated concrete panel according to claim 1, wherein the left and right sides of the front surface of the concrete panel are provided with first slots along the length direction of the concrete panel, the first slots penetrate the front surface longitudinally, the width of the first slots is 4cm-6cm, and the height of the first slots is 0.4cm-0.6 cm; and the left side and the right side of the rear surface are both provided with second slots along the length direction of the concrete slab, and the second slots longitudinally penetrate through the rear surface, are 4cm-6cm in width and 0.4cm-0.6cm in height.
8. Autoclaved aerated concrete panel according to claim 1, characterized in that: the autoclaved aerated concrete slab is an aerogel concrete slab.
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