A cold storage ultra-thin floor with internal insulation structure and a construction method thereof

Abstract

This invention relates to an ultra-thin flooring for cold storage with an internal insulation structure and its construction method. The construction method includes the following specific steps: S1: Casting a reinforced concrete floor slab; S2: Sequentially laying a vapor barrier layer, an insulation layer, a waterproof and breathable layer, and a geotextile layer on the reinforced concrete floor slab; S3: Pouring a concrete surface layer on the waterproof and breathable layer. The advantages of this invention are its simple process and convenient construction. Addressing the characteristics of large-area ultra-thin flooring in large concrete cold storage structures—prone to cracking, peeling, and poor flatness—this invention develops an internal insulation structure for ultra-thin cold storage room flooring and its construction method, solving the technical problems of difficult repair after cracking of ultra-thin flooring in low-temperature cold storage, impacting cold storage operation, and low construction efficiency.

Description

Technical Field

[0001] This invention relates to the field of cold storage construction technology, specifically to an ultra-thin cold storage floor with an internal insulation structure and its construction method. Background Technology

[0002] Cold storage facilities are storage devices that use artificial refrigeration to maintain a constant temperature and humidity environment. Originating from ice cellars, they cover temperatures from 5°C to -30°C and are used to store food, medicine, vaccines, and other items. They are typically located near shipping ports or the place of origin. Their core components consist of a compressor, condenser, expansion valve, and evaporator, and their refrigeration area far exceeds that of a household refrigerator.

[0003] Currently, cold storage facilities typically use ordinary concrete floors, which have the following technical problems: they are prone to cracking and peeling, have poor flatness, and are difficult to repair after cracking, affecting the operation of cold storage facilities. At the same time, the construction efficiency is low. Summary of the Invention

[0004] This invention addresses the technical deficiencies in existing technologies by providing an ultra-thin cold storage floor with an internal insulation structure and its construction method.

[0005] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: A construction method for ultra-thin cold storage flooring with internal insulation structure includes the following specific steps: S1: Cast-in-place reinforced concrete floor slab; S2: A vapor barrier, a thermal insulation layer, and a waterproof and breathable layer are sequentially laid on the reinforced concrete floor slab; S3: Pour a concrete surface layer on the waterproof and breathable layer.

[0006] The beneficial effects of this invention are: during the floor construction process, S1: cast-in-place reinforced concrete floor slab; S2: sequentially lay vapor barrier, thermal insulation layer and waterproof and breathable layer on the reinforced concrete floor slab; S3: pour concrete surface layer on the waterproof and breathable layer. The process is simple, construction is convenient and efficient.

[0007] This invention features a simple process and convenient construction. Addressing the issues of cracking, peeling, and poor flatness of large-area ultra-thin flooring in cold storage insulation systems, this invention develops an ultra-thin cold storage room flooring insulation structure and its construction method. This solves the technical problems of difficulty in repairing cracked ultra-thin flooring in low-temperature cold storage, impacting cold storage operation, and resulting in low construction efficiency.

[0008] Based on the above technical solution, the present invention can be further improved as follows.

[0009] Furthermore, step S2 includes the following specific steps: S21: An anti-oxidation aluminum foil vapor barrier layer is laid flat on the reinforced concrete floor slab, with an overlap width of 80-120mm. The overlap is sealed with 80-120mm aluminum foil tape. At the same time, the aluminum foil tape is used to seal the overlap 200-300mm up the wall around the reinforced concrete floor slab. S22: The insulation layer, consisting of multiple layers of 40-60mm thick polystyrene foam boards, is sequentially laid on the anti-oxidation aluminum foil vapor barrier layer. The upper and lower adjacent polystyrene foam boards are staggered, and the joint area percentage between the upper and lower adjacent polystyrene foam boards is greater than 50%. S23: Lay the waterproof and breathable layer on the multi-layer polystyrene foam board, overlapping it 80-120mm along the overlap line, and seal the overlap with 80-120mm aluminum foil tape.

[0010] The beneficial effects of adopting the above-mentioned further solution are that, on the one hand, by laying the insulation layer composed of multiple layers of 40-60mm thick standard polystyrene-polyethylene foam boards, the insulation performance of the entire floor is improved, cold air loss is prevented, energy consumption is reduced, and costs are saved. On the other hand, the vapor barrier can prevent the penetration of cold air in the cold storage, improve the insulation performance, and enhance the structural durability. At the same time, the waterproof and breathable layer can regulate the dynamic balance of water vapor in the insulation layer during the circulation process, avoiding the accumulation of water vapor, which can cause local bulging of the floor and lead to surface cracking.

[0011] Furthermore, S2 also includes the following S24: laying a geotextile layer on the waterproof and breathable layer.

[0012] The advantages of adopting the above-mentioned further solutions are that the structure is simple and the design is reasonable. During construction, the geotextile layer can protect the vapor barrier from being damaged by steel reinforcement binding and workers stepping on it during concrete pouring. During operation, it can easily cope with the load changes of the floor caused by cargo stacking and shipping in the later operation, and play a sponge buffer role to avoid cracking of the floor surface.

[0013] Furthermore, between S1 and S2, a cement mortar leveling layer is poured between the reinforced concrete floor slab and the vapor barrier.

[0014] The advantages of adopting the above-mentioned further scheme are that the construction method is simple and the design is reasonable. Pouring a layer of cement mortar leveling layer between the reinforced concrete floor slab and the vapor barrier can increase the effective contact area between the waterproof vapor barrier membrane and the ground, ensure that the waterproof vapor barrier membrane is in close contact with the concrete floor and is laid tightly, and thus provide a foundation for the flatness of the subsequent floor structure layer construction.

[0015] Furthermore, S3 also includes: S4: After construction, the surface should be cut into 6-meter square grooves with a depth of 20-60mm on the 2nd-3rd day of curing. S5: Construction of concrete sealing and curing layer.

[0016] The advantages of adopting the above-mentioned further solutions are that the process is simple and the design is reasonable. The above-mentioned curing and concrete curing processes can completely seal the capillaries on the concrete surface, completely eliminate the technical problem of peeling on the surface of cold storage floor, extend the service life of the floor, avoid the need for subsequent floor repairs with a one-time investment, and save costs.

[0017] The present invention also relates to an ultra-thin floor for cold storage with an internal insulation structure, comprising: a reinforced concrete floor slab, an insulation mechanism, and a concrete surface layer. The insulation mechanism includes a vapor barrier, an insulation layer, and a waterproof and breathable layer. The vapor barrier, the insulation layer, and the waterproof and breathable layer are laid flat on the reinforced concrete floor slab in sequence, and the concrete surface layer is distributed on the waterproof and breathable layer.

[0018] The beneficial effect of adopting the above-mentioned further solution is that during the floor construction process, the vapor barrier, the thermal insulation layer and the waterproof and breathable layer are laid flat on the reinforced concrete floor slab in sequence, and the concrete surface layer is distributed on the waterproof and breathable layer, which makes construction convenient and efficient.

[0019] This invention features a simple structure and convenient construction. Addressing the issues of cracking, peeling, and poor flatness of large-area ultra-thin flooring in cold storage insulation systems, this invention develops an ultra-thin cold storage room flooring insulation structure and its construction method. This solves the technical problems of difficulty in repairing cracked ultra-thin flooring in low-temperature cold storage, which affects cold storage operation and results in low construction efficiency.

[0020] Furthermore, the insulation layer includes multiple 40-60mm thick polystyrene foam boards, which are layered and staggered, and the staggered joints are compacted.

[0021] The advantages of adopting the above-mentioned further solution are that the structure is simple, the design is reasonable, the insulation layer is made of multiple 40-60mm thick polystyrene foam boards, the construction is convenient, the insulation effect is better, the cold air loss is effectively prevented, and the cost is saved.

[0022] Furthermore, the vapor barrier layer is a 0.1-0.3mm thick anti-oxidation aluminum foil vapor barrier layer, and the waterproof and breathable layer is a 0.3-0.5mm thick waterproof and breathable membrane.

[0023] The advantages of adopting the above-mentioned further solutions are that the structure is simple, the thickness of the vapor barrier and the waterproof and breathable layer is reasonably designed, which can not only play the corresponding role, but also save costs.

[0024] Furthermore, the concrete surface layer is a 60-100mm thick C30 corundum hardened floor.

[0025] The advantages of adopting the above-mentioned further solutions are that the structure is simple, the concrete surface layer is more reasonably cured with C30 corundum, C30 corundum has a high strength grade, and the service life of the floor is long.

[0026] Furthermore, a cement mortar leveling layer is provided between the reinforced concrete floor slab and the vapor barrier, and a geotextile layer is provided between the waterproof and breathable layer and the concrete surface layer.

[0027] One advantage of adopting the above-mentioned further solutions is that the cement mortar leveling layer can increase the flatness of the entire floor construction, making it more aesthetically pleasing. On the other hand, the geotextile layer plays a role in isolation, filtration, drainage, reinforcement, and protection, ensuring the quality of the floor construction. Attached Figure Description

[0028] Figure 1 This is a flowchart of the construction process of the present invention; Figure 2 This is a schematic diagram of the floor structure in this invention.

[0029] The attached diagram lists the components represented by each number as follows: 1. Reinforced concrete floor slab; 2. Vapor barrier; 3. Thermal insulation layer; 31. Polystyrene foam board; 4. Waterproof and breathable layer; 5. Concrete surface layer; 6. Geotextile layer; 7. Cement mortar leveling layer. Detailed Implementation

[0030] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0031] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0032] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this technology based on the specific circumstances.

[0033] In the description of this application, spatial relation terms such as "below," "under," "below," "below," "above," "over," etc., are used herein to describe the relationship between one element or feature shown in the figures and other elements or features. It should be understood that, in addition to the orientation shown in the figures, spatial relation terms also include different orientations of the device in use and operation. For example, if the device in the figures is flipped, an element or feature described as "below" or "under" or "below" of other elements or features will be oriented "above" other elements or features. Therefore, the exemplary terms "below" and "under" can include both upper and lower orientations. Furthermore, the device may also include other orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptive terms used herein are interpreted accordingly.

[0034] In the description of this application, the term "for example" is used to mean "used as an example, illustration, or description." Any embodiment described as "for example" in this application is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is provided to enable any person skilled in the art to make and use the invention. Details are set forth in the following description for purposes of explanation. It should be understood that those skilled in the art will recognize that the invention can be made without using these specific details. In other instances, well-known structures and processes will not be described in detail to avoid obscuring the description of the invention with unnecessary detail. Therefore, the invention is not intended to be limited to the embodiments shown, but is consistent with the broadest scope of the principles and features disclosed in this application.

[0035] Example 1 like Figure 1 and Figure 2 As shown in the figure, this embodiment provides a construction method for ultra-thin cold storage flooring with internal insulation structure, including the following specific steps: S1: Cast-in-place reinforced concrete floor slab 1; S2: A vapor barrier 2, a thermal insulation layer 3, and a waterproof and breathable layer 4 are sequentially laid on the reinforced concrete floor slab 1; S3: Pour a concrete surface layer 5 on the waterproof and breathable layer 4.

[0036] During the floor construction process, S1: cast-in-place reinforced concrete floor slab 1; S2: lay vapor barrier 2, thermal insulation layer 3 and waterproof and breathable layer 4 in sequence on the reinforced concrete floor slab 1; S3: pour concrete surface layer 5 on the waterproof and breathable layer 4. The process is simple, convenient to construct and efficient.

[0037] Based on the above scheme, the treatment method for the above reinforced concrete floor slab 1 is as follows: the reinforced concrete floor slab 1 should be roughened by shot blasting or grinding to improve the surface roughness.

[0038] In addition, in S3: the specific operation of pouring concrete surface layer 5 on the waterproof and breathable layer 4 is as follows: tie steel bars on the geotextile layer 6 and pour concrete.

[0039] This embodiment features a simple process and convenient construction. Addressing the issues of cracking, peeling, and poor flatness of large-area ultra-thin flooring in large concrete cold storage structures, this embodiment develops an ultra-thin cold storage room flooring insulation structure and its construction method. This solves the technical problems of difficulty in repairing cracked ultra-thin flooring in low-temperature cold storage, impacting cold storage operation, and resulting in low construction efficiency.

[0040] Example 2 Based on Example 1, in this example, step S2 includes the following specific steps: S21: An anti-oxidation aluminum foil vapor barrier layer is laid flat on the reinforced concrete floor slab 1, with an overlap width of 80-120mm. The overlap is sealed with 80-120mm aluminum foil tape. At the same time, the aluminum foil tape is used to seal the overlap 200-300mm up the wall around the reinforced concrete floor slab 1. S22: The insulation layer 3, consisting of multiple layers of 40-60mm thick polystyrene foam boards 31, is sequentially laid on the anti-oxidation aluminum foil vapor barrier layer. The upper and lower adjacent layers of polystyrene foam boards 31 are staggered, and the percentage of joint area between the upper and lower adjacent layers of polystyrene foam boards 31 is greater than 50%. S23: Lay the waterproof and breathable layer 4 on the multi-layer polystyrene foam board 31, overlapping it by 80-120mm along the overlap line, and seal the overlap with 80-120mm aluminum foil tape.

[0041] On the one hand, by laying the insulation layer composed of multiple layers of 40-60mm thick standard polystyrene-polyethylene foam boards, the insulation performance of the entire floor is improved, cold air loss is prevented, energy consumption is reduced, and costs are saved. On the other hand, the vapor barrier can prevent the penetration of cold air in the cold storage, improve the insulation performance, and enhance the structural durability. At the same time, the waterproof and breathable layer can regulate the dynamic balance of water vapor in the insulation layer during the circulation process, avoiding the accumulation of water vapor, which can cause local bulging of the floor and lead to surface cracking.

[0042] Preferably, in this embodiment, S21 above: An anti-oxidation aluminum foil vapor barrier is laid flat on the reinforced concrete floor slab 1, with an overlap width of 100mm. The overlap is sealed with 100mm aluminum foil tape. At the same time, the aluminum foil tape is used to seal the overlap 250mm up the wall around the perimeter of the reinforced concrete floor slab 1.

[0043] In addition, the above S22: The insulation layer 3, consisting of multiple layers of 50mm thick polystyrene foam boards 31, is laid sequentially on the anti-oxidation aluminum foil vapor barrier layer. The upper and lower adjacent polystyrene foam boards 31 are staggered and their overlap length is ≥100mm.

[0044] Moreover, the aforementioned S23: The waterproof and breathable layer 4 is laid on the multi-layer polystyrene foam board 31, with a 100mm overlap along the overlap line, and the overlap is sealed with 100mm aluminum foil tape.

[0045] Preferably, in this embodiment, S22 above: the insulation layer 3, consisting of four layers of 50mm thick polystyrene foam boards 31, is sequentially laid on the anti-oxidation aluminum foil vapor barrier layer.

[0046] In addition, the construction of the aforementioned vapor barrier 2: Anti-oxidation aluminum foil vapor barrier layers (water vapor permeability ≤ 0.2g / m²) are laid sequentially on the ground along the longitudinal direction of the cold storage from one side to the other. 2 • 24h), lay flat, with an overlap width of 100mm, seal the overlap with 100mm aluminum foil tape, and turn up 250mm along the inner walls around.

[0047] Preferably, in this embodiment, the 0.2mm anti-oxidation aluminum foil vapor barrier layer, i.e., the vapor barrier membrane, has a water vapor permeability ≤0.2g / m³. 2 • 24h, tensile strength longitudinally ≥420N / 50mm, transversely ≥420N / 50mm, nail shank tear strength longitudinally ≥200N, transversely ≥245N.

[0048] Based on the above scheme, the vapor barrier membrane meets the relevant construction requirements, and its relevant testing basis and results are shown in Table 1 and Table 2: Table 1. Basis for Vacuum Membrane Testing

[0049] Table 2. Vacuum membrane test results

[0050] The test results above show that the vapor barrier membrane used in this embodiment meets the relevant construction standards, thus ensuring the quality of construction.

[0051] Based on the above scheme, the polystyrene foam board 31 meets the relevant construction requirements, and its relevant testing basis and test results are shown in Table 3: Table 3. Test Table for Polystyrene Foam Board

[0052] The test results above show that the polystyrene foam board used in this embodiment meets the relevant construction standards, thus ensuring the quality of construction.

[0053] Example 3 Based on Example 2, in this example, S2 further includes the following S24: laying a geotextile layer 6 on the waterproof and breathable layer 4.

[0054] The solution has a simple structure and reasonable design. During construction, the geotextile layer can protect the vapor barrier from damage caused by steel reinforcement binding and workers stepping on it during concrete pouring. During operation, it can easily cope with the load changes of the floor caused by cargo stacking and shipping in the later operation, acting as a sponge buffer to avoid cracking of the floor surface.

[0055] Example 4 Based on the above embodiments, in this embodiment, the S1 and S2 further include: pouring a cement mortar leveling layer 7 between the reinforced concrete floor slab 1 and the vapor barrier 2.

[0056] This construction method is simple and reasonably designed. By pouring a layer of cement mortar leveling layer between the reinforced concrete floor slab and the vapor barrier, the effective contact area between the waterproof vapor barrier membrane and the ground can be increased, ensuring that the waterproof vapor barrier membrane is in close contact with the concrete floor and is laid firmly, thus providing a foundation for the flatness of the subsequent floor structure layer construction.

[0057] Before pouring the above-mentioned cement mortar leveling layer 7, the reinforced concrete floor slab 1 should be cleaned with a high-pressure water gun to ensure that the reinforced concrete floor slab 1 is in a moist but dry state.

[0058] In addition, the above-mentioned cement mortar should preferably use M20 strength grade.

[0059] Example 5 Based on the above embodiments, in this embodiment, after S3, the following is also included: S4: After construction, the surface should be cut into 6-meter square grooves with a depth of 20-60mm on the 2nd-3rd day of curing. S5: Construction of concrete sealing and curing layer.

[0060] The process is simple and reasonably designed. The above-mentioned curing and concrete hardening process can completely seal the capillaries on the concrete surface, completely eliminate the technical problem of peeling on the surface of cold storage floor, extend the service life of the floor, and avoid the need for subsequent floor repairs with a one-time investment, thus saving costs.

[0061] Based on the above plan, in S4 above, curing and joint cutting are required. After the non-metallic wear-resistant flooring is completed, it should be cured for no less than 7 days. On the 2nd-3rd day of curing, a 6-meter square joint should be cut on the surface as required, with a joint depth of 40mm.

[0062] In addition, in S5 above, the concrete sealing and curing layer is constructed. Damage, holes, and cracks are repaired with epoxy resin and quartz sand mortar and allowed to dry. Finally, resin grinding discs are used to grind away the laitance and stains on the base layer, making the base layer clean and flat. Two coats of curing agent are applied, using a roller to apply evenly, ensuring that the curing agent fully penetrates (no liquid accumulation on the surface). Polishing is performed 7 days after the curing agent application is completed. Before polishing, the ground is cleaned and polished twice with a high-speed polisher using resin grinding discs to achieve a good gloss.

[0063] Preferably, in this embodiment, the concrete sealing and curing agent is preferably a lithium-based curing agent (penetration depth ≥ 5 mm, surface hardness increased by more than 30% after curing).

[0064] Example 6 Based on the above embodiments, this embodiment also provides an ultra-thin cold storage floor with an internal insulation structure, including: a reinforced concrete floor slab 1, an insulation mechanism and a concrete surface layer 5. The insulation mechanism includes a vapor barrier layer 2, an insulation layer 3 and a waterproof and breathable layer 4. The vapor barrier layer 2, the insulation layer 3 and the waterproof and breathable layer 4 are laid flat on the reinforced concrete floor slab 1 in sequence, and the concrete surface layer 5 is distributed on the waterproof and breathable layer 4.

[0065] During the floor construction process, the vapor barrier layer 2, the thermal insulation layer 3, and the waterproof and breathable layer 4 are laid flat on the reinforced concrete floor slab 1 in sequence, and the concrete surface layer 5 is distributed on the waterproof and breathable layer 4, which makes construction convenient and efficient.

[0066] This embodiment features a simple structure and convenient construction. Addressing the issues of large-area ultra-thin flooring in large concrete cold storage structures being prone to cracking, peeling, and poor flatness, this embodiment develops an ultra-thin cold storage room flooring insulation structure and its construction method. This solves the technical problems of difficulty in repairing cracked ultra-thin flooring in low-temperature cold storage, which affects cold storage operation and results in low construction efficiency.

[0067] Example 7 Based on Example 6, in this example, the insulation layer 3 includes multiple 40-60mm thick polystyrene foam boards 31, which are layered and staggered and compacted.

[0068] The solution has a simple structure and reasonable design. The insulation layer 3 is made of multiple 40-60mm thick polystyrene foam boards 31, which is easy to construct and has a good insulation effect, effectively preventing the loss of cold air and saving costs.

[0069] Preferably, in this embodiment, the above-mentioned insulation layer 3 includes a plurality of 50mm thick polystyrene foam boards 31.

[0070] In addition, 50mm thick polystyrene foam board has the following properties: thermal conductivity ≤0.028W / M, compressive strength ≥350Kpa for rooms with temperature requirements, water absorption ≤1%, dimensional stability ≤1.5%, and a fire rating of B1.

[0071] Alternatively, the number of polystyrene foam boards 31 included in the above-mentioned insulation layer 3 can also be designed according to requirements.

[0072] Example 8 Based on any one of Examples 6 to 7, in this example, the vapor barrier 2 is a 0.1-0.3 mm thick anti-oxidation aluminum foil vapor barrier, and the waterproof and breathable layer 4 is a 0.3-0.5 mm thick waterproof and breathable membrane.

[0073] The design is simple in structure, and the thickness of the vapor barrier 2 and the waterproof and breathable layer 4 is reasonably designed, which can not only play the corresponding role, but also save costs.

[0074] Preferably, in this embodiment, the vapor barrier 2 is a 0.2mm thick anti-oxidation aluminum foil vapor barrier. In addition, the waterproof and breathable layer 4 is a 0.4mm thick waterproof and breathable membrane.

[0075] Furthermore, the 0.4mm thick waterproof and breathable membrane exhibits the following tensile strengths: longitudinal ≥320N / 50mm, transverse ≥200N / 50mm; nail shank tear strength: longitudinal ≥120N, transverse ≥120N; and water vapor permeability >1000g / m². 2 ·24h.

[0076] Based on the above scheme, the waterproof and breathable membrane meets the relevant construction requirements, and its relevant testing basis and results are shown in Tables 4 and 5: Table 4. Testing Criteria for Waterproof and Breathable Membranes

[0077] Table 5. Test Results of Waterproof and Breathable Membrane

[0078] Based on the above test results, it can be concluded that the waterproof and breathable membrane used in this embodiment fully meets the construction requirements.

[0079] Example 9 Based on any one of Examples 6 to 8, in this example, the concrete surface layer 5 is a 60-100mm thick C30 corundum hardened floor.

[0080] The scheme has a simple structure, and it is reasonable to use C30 corundum to cure the concrete surface layer 5. C30 corundum has a high strength grade and a long service life for the floor.

[0081] Preferably, in this embodiment, the concrete surface layer 5 is an 80mm thick C30 corundum hardened floor.

[0082] Based on the above plan, a 120mm thick C30 fine aggregate concrete surface layer was poured. Internally... For 8@200 bidirectional crack-resistant steel bars, a laser screed is used to move longitudinally along the pouring area at a speed of 0.5-1m / min. After each pass, a 2m straightedge is used to check the flatness. Areas with errors exceeding the standard need to be manually supplemented or scraped off. The screeding is repeated 2-3 times until the flatness error is ≤2mm / 2m. After screeding, a trowel is used to smooth the surface to remove the marks left by the laser screed and make the concrete surface dense.

[0083] Example 10 Based on the above embodiments, in this embodiment, a cement mortar leveling layer 7 is provided between the reinforced concrete floor slab 1 and the vapor barrier 2, and a geotextile layer 6 is provided between the waterproof and breathable layer 4 and the concrete surface layer 5.

[0084] On the one hand, the cement mortar leveling layer 7 can increase the flatness of the entire floor construction, making it more aesthetically pleasing; On the other hand, the geotextile layer 6 plays a role in isolation, filtration, drainage, reinforcement and protection, ensuring the quality of the floor construction.

[0085] This invention provides an ultra-thin flooring for cold storage with an internal insulation structure and its construction method. The construction process is as follows: Cast-in-place reinforced concrete floor slab → one layer of cement slurry (with construction adhesive) → 20mm thick 1:3 cement mortar leveling layer → full-coverage anti-oxidation aluminum foil vapor barrier (100mm overlap) → 200mm thick (first and fourth floor cold storage rooms) / 150mm thick (ice storage room) / 100mm thick (first floor passageway) extruded polystyrene foam board insulation layer (using 50mm extruded polystyrene foam board layered and staggered), staggered joint compaction → laying waterproof and breathable membrane, 100mm overlap, turning up 350mm at walls and columns → one layer of geotextile → pouring concrete surface layer → spreading and compacting diamond aggregate → curing and joint cutting → construction of concrete sealing and curing layer.

[0086] The specific steps of the above construction process are as follows: 1) Concrete floor slab base treatment: The concrete base should be roughened by shot blasting or grinding to improve the surface roughness; before pouring the leveling layer, the base should be cleaned with a high-pressure water gun and ensured that the base is moist but without standing water.

[0087] 2) Cement mortar leveling layer: When using an interface agent to treat the base layer, the construction procedure should be strictly controlled, and the interface agent should not be used too early.

[0088] 3) Vapor barrier construction: Anti-oxidation aluminum foil vapor barrier (water vapor permeability ≤ 0.2g / m²) is laid sequentially on the ground along the longitudinal direction of the cold storage from one side to the other. 2 (24h), lay flat, with an overlap width of 100mm, seal the overlap with 100mm aluminum foil tape, and turn up 250mm along the inner walls around the perimeter.

[0089] 4) The insulation layer consists of four layers of 50mm thick polystyrene foam boards. The joints of adjacent upper and lower layers should be staggered, and the overlap length should not be less than 100mm.

[0090] 5) Lay a waterproof and breathable membrane, overlapping it 100mm along the overlap line. Seal the overlap with 100mm aluminum foil tape. Lay a full layer of geotextile, and finally lay a full layer of geotextile, making sure it is flat.

[0091] 6) Pour an 80mm thick C30 fine aggregate concrete surface layer. (Inner layer should be...) For 8@200 bidirectional crack-resistant steel bars, a laser screed is used to move longitudinally along the pouring area at a speed of 0.5-1m / min. After each pass, a 2m straightedge is used to check the flatness. Areas with errors exceeding the standard need to be manually supplemented or scraped off. The screeding is repeated 2-3 times until the flatness error is ≤2mm / 2m. After screeding, a trowel is used to smooth the surface to remove the marks left by the laser screed and make the concrete surface dense.

[0092] 7) Spreading and compacting of corundum aggregate. The optimal time for spreading is when the penetration resistance of the concrete surface reaches 3-5 MPa. Spread the aggregate in two batches and use a floor grinder to grind it at a uniform speed along the longitudinal direction at a speed of 1-1.5 m / min. Grind it repeatedly for more than 2 times to ensure that the aggregate is embedded 3-5 mm into the concrete surface and that there is no loose aggregate on the concrete surface.

[0093] 8) Curing and joint cutting. After the construction of non-metallic wear-resistant flooring is completed, it shall be cured for no less than 7 days. On the 2nd-3rd day of curing, a 6-meter square joint shall be cut on the surface as required, with a joint depth of 40mm.

[0094] 9) Construction of concrete sealing and curing layer. Damage, holes, and cracks are repaired with epoxy resin and quartz sand mortar and allowed to dry. Finally, resin grinding discs are used to grind away the laitance and stains on the base layer, making the base layer clean and flat. Two coats of curing agent are applied, using a roller to apply evenly, ensuring that the curing agent fully penetrates (no liquid accumulation on the surface). Polishing is carried out 7 days after the curing agent application is completed. Before polishing, the ground is cleaned, and the ground is polished twice with a high-speed polishing machine with resin grinding discs to achieve a good gloss.

[0095] Throughout the entire construction process, C30 commercial concrete was used as the concrete substrate.

[0096] Furthermore, the flooring and construction process provided by this invention are applicable to large-area low-temperature cold storage facilities, such as those with a flooring area of ​​7000m². 2 The floor is an ultra-thin corundum-cured floor with a thermal insulation system.

[0097] This invention provides an ultra-thin flooring for cold storage with an internal insulation structure and its construction method. The process is simple and the construction is convenient. Addressing the characteristics of large-area ultra-thin flooring in the internal insulation system of large concrete cold storage structures, such as easy cracking, peeling, and poor flatness, this invention develops an internal insulation structure for ultra-thin cold storage room flooring and its construction method. This solves the technical problems of difficult repair after cracking of ultra-thin flooring in low-temperature cold storage, which affects the operation of cold storage and results in low construction efficiency.

[0098] Quality prevention measures during construction: 1. Key points for controlling surface sanding in concrete: Control the concrete slump to ≤120mm; complete the spreading before initial setting; treatment methods... Slight sanding: Apply a sealant and hardener; Severe sanding: Remove 5mm of the surface layer, re-spread aggregate, and grind.

[0099] 2. Key points for controlling unevenness: Calibrate the leveling machine before construction; check with a straightedge after adding material; remedial measures: Error > 5mm: Grind to acceptable quality using a grinder; If the error is greater than 10mm: add concrete and aggregate and redo the work.

[0100] After construction is completed, the quality inspection is shown in Table 6 below: Table 6 Quality Inspection

[0101] While embodiments or examples of this disclosure have been described with reference to the accompanying drawings, it should be understood that the above embodiments are merely exemplary embodiments or examples, and the scope of the invention is not limited by these embodiments or examples, but only by the granted claims and their equivalents. Various elements in the embodiments or examples may be omitted or replaced by their equivalents. Furthermore, the steps may be performed in a different order than that described in this disclosure. Further, various elements in the embodiments or examples may be combined in various ways. Importantly, as the technology evolves, many elements described herein can be replaced by equivalents that appear after this disclosure.

Claims

1. A construction method for ultra-thin cold storage flooring with internal insulation structure, characterized in that, The specific steps include the following: S1: Cast-in-place reinforced concrete floor slab (1); S2: A vapor barrier (2), a thermal insulation layer (3) and a waterproof and breathable layer (4) are laid sequentially on the reinforced concrete floor slab (1). S3: Pour a concrete surface layer (5) on the waterproof and breathable layer (4) and add corundum at the same time.

2. The construction method for ultra-thin cold storage flooring with internal insulation structure according to claim 1, characterized in that, S2 includes the following specific steps: S21: An anti-oxidation aluminum foil vapor barrier layer is laid flat on the reinforced concrete floor slab (1), with an overlap width of 80-120mm. The overlap is sealed with 80-120mm aluminum foil tape, and the overlap is turned up 200-300mm onto the wall around the perimeter of the reinforced concrete floor slab (1). S22: The insulation layer (3) consisting of multiple layers of 40-60mm thick polystyrene foam boards (31) is sequentially laid on the anti-oxidation aluminum foil vapor barrier layer. The upper and lower adjacent polystyrene foam boards (31) are staggered, and the joint area percentage between the upper and lower adjacent polystyrene foam boards (31) is greater than 50%. S23: Lay the waterproof and breathable layer (4) on the multilayer polystyrene foam board (31), overlapping it 80-120mm along the overlap line, and seal the overlap with 80-120mm aluminum foil tape.

3. The construction method for ultra-thin cold storage flooring with internal insulation structure according to claim 2, characterized in that, The S2 also includes the following S24: laying a geotextile layer (6) on the waterproof and breathable layer (4).

4. The construction method for ultra-thin cold storage flooring with internal insulation structure according to any one of claims 1-3, characterized in that, Between S1 and S2, a cement mortar leveling layer (7) is poured between the reinforced concrete floor slab (1) and the vapor barrier (2).

5. The construction method for ultra-thin cold storage flooring with internal insulation structure according to any one of claims 1-3, characterized in that, S3 is followed by: S4: After construction, the surface should be cut into 6-meter square grooves with a depth of 20-60mm on the 2nd-3rd day of curing. S5: Construction of concrete sealing and curing layer.

6. A type of ultra-thin cold storage floor with internal insulation structure, characterized in that, include: The reinforced concrete floor slab (1), the insulation mechanism and the concrete surface layer (5) are provided. The insulation mechanism includes a vapor barrier (2), an insulation layer (3) and a waterproof and breathable layer (4). The vapor barrier (2), the insulation layer (3) and the waterproof and breathable layer (4) are laid flat on the reinforced concrete floor slab (1) in sequence, and the concrete surface layer (5) is distributed on the waterproof and breathable layer (4).

7. The ultra-thin cold storage floor with internal insulation structure according to claim 6, characterized in that, The insulation layer (3) includes multiple 40-60mm thick polystyrene foam boards (31), which are layered and staggered and compacted.

8. The ultra-thin cold storage floor with internal insulation structure according to claim 6, characterized in that, The vapor barrier layer (2) is a 0.1-0.3 mm thick anti-oxidation aluminum foil vapor barrier layer, and the waterproof and breathable layer (4) is a 0.3-0.5 mm thick waterproof and breathable membrane.

9. The ultra-thin cold storage floor with internal insulation structure according to claim 6, characterized in that, The concrete surface layer (5) is a 60-100mm thick C30 corundum hardened floor.

10. The ultra-thin cold storage floor with internal insulation structure according to any one of claims 6-9, characterized in that, A cement mortar leveling layer (7) is provided between the reinforced concrete floor slab (1) and the vapor barrier layer (2), and a geotextile layer (6) is provided between the waterproof and breathable layer (4) and the concrete surface layer (5).

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