Construction method of a heat-insulating and sound-insulating floor structure

Abstract

The present invention discloses a construction method for a heat-insulating and sound-insulating floor structure, which comprises the following steps: calculating the diameter of the steel bars required for the steel bar mesh in the concrete protective layer; calculating the laying spacing of the steel bars of the steel bar mesh on the horizontal plane and the number of steel bars used; calculating the thickness of the heat-insulating and sound-insulating layer construction based on the designed heat transfer coefficient and sound insulation quantity of the heat-insulating and sound-insulating layer; cleaning the surface of the floor base layer, and pasting vertical sound-insulating sheets and edge protection layers; preparing the heat-insulating and sound-insulating layer material to form a heat-insulating and sound-insulating layer; constructing a leveling layer; after the leveling layer is dried, pouring concrete to form a concrete protective layer; and completing the construction of the heat-insulating and sound-insulating floor structure. The present invention simplifies the construction process, reduces the construction difficulty and cost; the moisture-proof and mildew-proof gypsum self-leveling mortar effectively prevents the problems of floor moisture and mildew.

Description

Technical Field

[0001] The present invention relates to the field of building construction, and particularly to a construction method for a thermal insulation and sound insulation floor structure. Background Art

[0002] In the prior art, the thermal insulation and sound insulation treatment of floors mostly adopts a multi-layer structure, which is complex in construction, high in material cost, and difficult to ensure long-term thermal insulation and sound insulation effects. Moreover, in the design and construction process, the refinement of the design of the thermal insulation and sound insulation structure is insufficient, resulting in high material costs, inaccurate design, inability to guarantee the quality and service life of later use, and problems such as single material performance, complex construction processes, and difficult quantitative evaluation of thermal insulation and sound insulation effects in construction. Therefore, there is an urgent need to propose an innovative construction method for a thermal insulation and sound insulation floor structure. Summary of the Invention

[0003] In view of the above deficiencies of the prior art, the present invention provides a construction method for a thermal insulation and sound insulation floor structure, which improves the construction efficiency and quality.

[0004] To achieve the above invention object, the technical solution adopted by the present invention is as follows:

[0005] A construction method for a thermal insulation and sound insulation floor structure is provided, which includes the following steps:

[0006] S1: Determine the design load on the floor surface according to the use of the target floor, and calculate the diameter d2 of the steel bars required for the steel bar mesh in the concrete protective layer based on the maximum allowable crack width ω during the later use after construction; max

[0007] S2: Calculate the laying spacing s of the steel bars of the steel bar mesh in the horizontal plane and the number n of steel bars used according to the surface area A of the floor;

[0008] S3: Select the thermal insulation and sound insulation material for the thermal insulation and sound insulation layer, and calculate the thickness of the thermal insulation and sound insulation layer construction based on the designed heat transfer coefficient and designed sound insulation quantity of the thermal insulation and sound insulation layer;

[0009] S4: Pop a horizontal reference line on the surrounding walls of the floor base, and check whether it is correct. Then, clean the surface of the floor base to ensure no sundries;

[0010] S5: Paste vertical sound insulation sheets at the corners and door sills, and then set a protective edge layer at the intersection of the floor perimeter and the wall. The protective edge layer uses a supporting new type of EVA thermal insulation and sound insulation coil material, and the thickness of the protective edge layer is not less than 3 mm, and ensure that all intersections are tightly pasted;

[0011] S6: Prepare the material for the thermal insulation and sound insulation layer. The material for the thermal insulation and sound insulation layer is a slurry of a foamed gypsum-based composite material. The slurry is evenly applied on the floor base by a wet process to form a thermal insulation and sound insulation layer;​

[0012] S7: After the slurry is cured, a gypsum-based self-leveling material with adhesive powder added is evenly applied to the thermal insulation and sound insulation layer for leveling to form a leveling layer, ensuring that the flatness should not be greater than 5 mm.

[0013] S8: After the leveling layer is dry, a steel mesh is erected on the leveling layer according to the number of steel bars n and the laying spacing s of the steel bars, and concrete is poured to form a concrete protective layer.

[0014] S9: After the concrete protective layer solidifies, the construction of the thermal insulation and sound insulation floor structure is completed.

[0015] Furthermore, the calculation method of the steel bar diameter d2 is as follows;

[0016]

[0017] Wherein, α is the stress characteristic coefficient of the concrete protective layer, ψ is the strain non-uniformity coefficient of the tensile steel bar when cracks occur, σ is the equivalent stress generated by the steel bar, E is the elastic modulus of the steel bar, c is the designed thickness of the concrete protective layer, d1 is the equivalent diameter of the steel bar, ρ is the reinforcement ratio, f is the standard value of the tensile strength of the concrete protective layer, A1 is the cross-sectional area of the steel bar, A2 is the cross-sectional area of the concrete protective layer, v is the relative bonding characteristic coefficient of the steel bar, and k1 is the crack correction coefficient;

[0018] Furthermore, the method for calculating the laying spacing s of the steel bars of the steel mesh in the horizontal plane and the number of steel bars n used is as follows;

[0019]

[0020] Wherein, is to round down to an integer, is to round up to an integer, L is the length of the floor, W is the width of the floor, represents the number of steel bars in the length direction, represents the number of steel bars in the width direction, represents the number of steel bar grids in the length direction, represents the number of steel bar grids in the width direction, and κ is the construction allowance at the edge of the steel mesh.

[0021] Furthermore, step S3 includes:

[0022] S31: According to the thermal insulation and sound insulation material selected for the thermal insulation and sound insulation layer, calculate the thickness N1 of the thermal insulation and sound insulation layer;

[0023]

[0024] Among them, R1 is the heat transfer resistance of the floor base layer below the thermal insulation and sound insulation layer, R2 is the heat transfer resistance of the leveling layer above the thermal insulation and sound insulation layer, δ is the unit thickness of the thermal insulation and sound insulation layer, λ is the thermal conductivity of the thermal insulation and sound insulation layer material per unit thickness, a is the correction coefficient of the thermal conductivity, and K0 is the designed heat transfer coefficient of the thermal insulation and sound insulation layer;

[0025] S32: Calculate the thickness N2 of the thermal insulation and sound insulation layer based on the designed sound insulation quantity Y0 of the thermal insulation and sound insulation layer;

[0026]

[0027] Among them, g is the acceleration of gravity, ρ1 is the density of the thermal insulation and sound insulation material, f′ is the frequency of the noise sound wave, ρ0 is the sound wave velocity, and C is the air density;

[0028] S33: Take the maximum value between the thickness N2 and N1 as the construction thickness of the thermal insulation and sound insulation layer.

[0029] Furthermore, the foamed gypsum-based composite material includes 60 to 85 parts of α-type high-strength gypsum, 0.06 to 0.12 parts of a retarding water reducer, 30 to 50 parts of water, 0 (and ≤3 parts) of a waterproofing agent, 1 to 3 parts of a composite foaming agent, and 5 to 15 parts of lightweight aggregate.

[0030] Furthermore, the gypsum-based material includes 100 to 120 parts of phosphogypsum or desulfurized gypsum, 35 to 50 parts of water, 0.26 to 1.12 parts of a retarding water reducer, 0.2 to 0.8 parts of a waterproofing agent, and 0.2 to 0.5 parts of a mildew-proofing agent.

[0031] The beneficial effects of the present invention are as follows: Based on the performance requirements of the thermal insulation and sound insulation floor structure design, the construction parameters of each main functional layer are accurately calculated to ensure precise construction and the usage effect after construction, enabling the thermal insulation and sound insulation floor structure to exhibit optimal performance with the least material cost. Through the combination of refined mathematical analysis and engineering practice, the optimization of thermal insulation and sound insulation performance is achieved, significantly improving the construction efficiency and quality level. The thermal insulation and sound insulation layer material provided by the present invention has better thermal insulation performance and sound insulation effect. It simplifies the construction process, reduces the construction difficulty and cost; the moisture-proof and mildew-proof gypsum self-leveling mortar effectively prevents the problems of floor moisture and mildew. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a flow chart of the construction method of the thermal insulation and sound insulation floor structure. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] The following describes the specific embodiments of the present invention to facilitate those skilled in the art to understand the present invention. However, it should be clear that the present invention is not limited to the scope of the specific embodiments. For those of ordinary skill in the art, as long as various changes are within the spirit and scope of the present invention defined and determined by the appended claims, these changes are obvious, and all inventions created using the concept of the present invention are within the scope of protection.

[0034] As Figure 1 shown, a construction method of a thermal insulation and sound insulation floor structure includes the following steps:

[0035] S1: Determine the design load on the floor surface according to the use of the target floor, and calculate the diameter d2 of the steel bars required for the steel bar mesh in the concrete protective layer based on the maximum allowable crack width ω during the post-construction use process; the calculation method of the steel bar diameter d2 is as follows; max Calculate the diameter d2 of the steel bars required for the steel bar mesh in the concrete protective layer; the calculation method of the steel bar diameter d2 is as follows;

[0036]

[0037] Among them, α is the stress characteristic coefficient of the concrete protective layer, ψ is the strain non-uniformity coefficient of the tensile steel bars when cracks occur, generally taking 1.0, σ is the equivalent stress generated by the steel bars, E is the elastic modulus of the steel bars, c is the designed thickness of the concrete protective layer, d1 is the equivalent diameter of the steel bars, ρ is the reinforcement ratio, which can represent the distribution density of the steel bars on the cross-section of the concrete protective layer, f is the standard value of the tensile strength of the concrete protective layer, A1 is the cross-sectional area of the steel bars, A2 is the cross-sectional area of the concrete protective layer, v is the relative bonding characteristic coefficient of the steel bars, k1 is the crack correction coefficient, generally taking 0.8 - 0.6 to reduce the risk of accidental errors;

[0038] S2: Calculate the laying spacing s of the steel bars of the steel bar mesh in the horizontal plane and the number n of steel bars used according to the surface area A of the floor;

[0039]

[0040] Among them, is the integer part taken downward, is the integer part taken upward, L is the length of the floor, W is the width of the floor, represents the number of steel bars in the length direction, represents the number of steel bars in the width direction, represents the number of steel bar grids in the length direction, represents the number of steel bar grids in the width direction, κ is the construction allowance at the edge of the steel bar mesh.

[0041] First, calculate the number of grids of the steel bars in the length direction (including the grids at both ends), and then calculate the number of grids in the width direction. However, it should be noted that this calculation method is actually an estimation because it does not consider the actual interlacing or overlapping of the steel bars, nor the gaps between the steel bars. In this solution, the arrangement of the steel bars is assumed to be a uniform parallel arrangement for calculation.

[0042] S3: Select the thermal insulation and sound insulation material for the thermal insulation and sound insulation layer, and calculate the thickness of the thermal insulation and sound insulation layer construction based on the designed heat transfer coefficient and sound insulation quantity of the thermal insulation and sound insulation layer; Step S3 specifically includes:

[0043] S31: Select the thermal insulation and sound insulation material for the thermal insulation and sound insulation layer, and calculate the thickness N1 of the thermal insulation and sound insulation layer;

[0044]

[0045] Among them, R1 is the heat transfer resistance of the floor base layer below the thermal insulation and sound insulation layer, generally taking 0.17, R2 is the heat transfer resistance of the leveling layer above the thermal insulation and sound insulation layer, generally taking 0.16, δ is the unit thickness of the thermal insulation and sound insulation layer, λ is the thermal conductivity of the thermal insulation and sound insulation layer material per unit thickness, a is the correction coefficient of the thermal conductivity, and K0 is the designed heat transfer coefficient of the thermal insulation and sound insulation layer;

[0046] S32: Based on the designed sound insulation quantity Y0 of the thermal insulation and sound insulation layer, calculate the thickness N2 of the thermal insulation and sound insulation layer;

[0047]

[0048] Among them, g is the acceleration due to gravity, ρ1 is the density of the thermal insulation and sound insulation material, f′ is the frequency of the noise sound wave, ρ0 is the sound wave velocity, and C is the air density;

[0049] S33: Take the maximum value between the thickness N2 and N1 as the thickness of the thermal insulation and sound insulation layer construction.

[0050] S4: Pop up the elevation horizontal line on the surrounding walls of the floor base layer, and check whether it is correct. Then, clean the surface of the floor base layer to ensure there is no debris.

[0051] S5: Paste vertical sound insulation sheets at the corners and door sills, and then set the edge protection layer at the intersection of the floor perimeter and the wall. The edge protection layer uses the supporting new EVA thermal insulation and sound insulation coil. The thickness of the edge protection layer is not less than 3 mm, and ensure that the joints are all pasted tightly.

[0052] S6: Prepare the thermal insulation and sound insulation layer material. The thermal insulation and sound insulation layer material is a slurry of foamed gypsum-based composite material. The slurry is evenly applied on the floor base layer by a wet process to form the thermal insulation and sound insulation layer. The foamed gypsum-based composite material includes 60 to 85 parts of α-type high-strength gypsum, 0.06 to 0.12 parts of a retarder water reducer, 30 to 50 parts of water, 0 part < and ≤ 3 parts of a waterproof agent, 1 to 3 parts of a composite foaming agent, and 5 to 15 parts of lightweight aggregate.

[0053] S7: After the slurry is cured, a gypsum-based self-leveling material with adhesive powder added is evenly brushed on the thermal insulation and sound insulation layer for leveling to form a leveling layer, ensuring that the flatness should not be greater than 5 mm. The gypsum-based material includes 100 to 120 parts of phosphogypsum or desulfurized gypsum, 35 to 50 parts of water, 0.26 to 1.12 parts of a retarder water reducer, 0.2 to 0.8 parts of a waterproof agent, and 0.2 to 0.5 parts of a mildew-proof agent.

[0054] S8: After the leveling layer is dry, a steel mesh is erected on the leveling layer according to the number of steel bars n and the steel bar laying spacing s, and concrete is poured to form a concrete protective layer.

[0055] S9: After the concrete protective layer solidifies, the construction of the thermal insulation and sound insulation floor structure is completed.

[0056] Based on the performance requirements of the thermal insulation and sound insulation floor structure design of the present invention, the construction parameters of each main functional layer are accurately calculated to ensure accurate construction and the use effect after construction, so that the thermal insulation and sound insulation floor structure exhibits the optimal performance with the least material cost. Through the combination of refined mathematical analysis and engineering practice, the optimization of the thermal insulation and sound insulation performance is realized, and the construction efficiency and quality level are significantly improved. The thermal insulation and sound insulation layer material provided by the present invention has better thermal insulation performance and sound insulation effect. The construction process is simplified, and the construction difficulty and cost are reduced; the moisture-proof and mildew-proof gypsum self-leveling mortar effectively prevents the problems of floor moisture and mildew.

Claims

1. A construction method for a thermal insulation and sound insulation floor structure, characterized in that: The following steps are involved: S1: Determine the design load on the floor surface according to the purpose of the target floor, based on the maximum crack width ω allowed during use after construction max Calculate the steel bar diameter d2 required for the steel mesh in the concrete cover; S2: According to the surface area A of the floor, calculate the laying spacing s of the steel bars of the steel mesh on the horizontal plane and the number of steel bars n used; S3: Calculate the thickness of the thermal insulation and sound insulation layer based on the thermal insulation and sound insulation material selected for the thermal insulation and sound insulation layer and the designed heat transfer coefficient and sound insulation of the thermal insulation and sound insulation layer; S4: Pop up the elevation horizontal lines on the walls around the floor base and check whether they are correct. Then, clean the surface of the floor base to ensure there is no debris. S5: Paste vertical sound insulation sheets at the corners and door sills, and then set edge protection layers around the floor and at the junctions of the walls. The edge protection layer uses a matching new EVA insulation and sound insulation membrane. The thickness of the edge protection layer is not less than 3mm, and ensure that the junctions are tightly pasted; S6: preparing a thermal insulation and sound insulation layer material, wherein the thermal insulation and sound insulation layer material is a slurry of a foamed gypsum-based composite material, and applying the slurry evenly on the floor base using a wet process to form a thermal insulation and sound insulation layer; S7: After the slurry solidifies, use a gypsum-based self-leveling agent with adhesive powder added to evenly brush it on the thermal insulation and sound insulation layer to form a leveling layer, ensuring that the flatness should not be greater than 5mm; S8: After the leveling layer is dry, a steel mesh is built on the leveling layer according to the number of steel bars n and the steel bar laying spacing s, and concrete is poured to form a concrete protective layer; S9: After the concrete protective layer solidifies, the thermal insulation and sound insulation floor structure construction is completed; The calculation method of the steel bar diameter d2 is: Among them, α is the stress characteristic coefficient of the concrete cover, ψ is the strain non-uniformity coefficient of the tensile steel bar when cracks occur, σ is the equivalent stress generated by the steel bar, E is the elastic modulus of the steel bar, c is the design thickness of the concrete cover, d1 is the equivalent diameter of the steel bar, ρ is the reinforcement ratio, f is the standard value of the tensile strength of the concrete cover, A1 is the cross-sectional area of ​​the steel bar, A2 is the cross-sectional area of ​​the concrete cover, v is the relative bonding characteristic coefficient of the steel bar, and k1 is the crack correction coefficient.

2. The construction method of the thermal insulation and sound insulation floor structure according to claim 1, characterized in that: The method for calculating the laying spacing s of the steel bars of the steel mesh on the horizontal plane and the number of steel bars n used is: in, To round down, To round up to an integer, L is the length of the floor, W is the width of the floor, Indicates the number of steel bars in the length direction. Indicates the number of steel bars in the width direction. Indicates the number of steel bars in the length direction. It represents the number of steel grids in the width direction, and κ is the construction allowance at the edge of the steel mesh.

3. The construction method of the thermal insulation and sound insulation floor structure according to claim 1, characterized in that: The step S3 comprises: S31: Calculate the thickness N1 of the thermal insulation and sound insulation layer according to the thermal insulation and sound insulation material selected for the thermal insulation and sound insulation layer; Wherein, R1 is the heat transfer resistance of the floor base below the thermal insulation layer, R2 is the heat transfer resistance of the leveling layer above the thermal insulation layer, δ is the unit thickness of the thermal insulation layer, λ is the thermal conductivity of the thermal insulation layer material per unit thickness, a is the correction factor of the thermal conductivity, and K0 is the design heat transfer coefficient of the thermal insulation layer; S32: Calculate the thickness N2 of the thermal insulation and sound insulation layer based on the designed sound insulation value Y0 of the thermal insulation and sound insulation layer; Among them, g is the acceleration of gravity, ρ1 is the density of the thermal insulation material, f' is the frequency of the noise sound wave, ρ0 is the speed of the sound wave, and C is the air density; S33: Take the maximum value between thickness N2 and N1 as the thickness of the thermal insulation layer.

4. The construction method of the thermal insulation and sound insulation floor structure according to claim 1, characterized in that: The foamed gypsum-based composite material comprises 60 to 85 parts of α-type high-strength gypsum, 0.06 to 0.12 parts of slow-setting water-reducing agent, 30 to 50 parts of water, 0 to 3 parts of waterproofing agent, 1 to 3 parts of composite foaming agent, and 5 to 15 parts of lightweight aggregate.

5. The construction method of the thermal insulation and sound insulation floor structure according to claim 1, characterized in that: The gypsum base includes 100 to 120 parts of phosphogypsum or desulfurized gypsum, 35 to 50 parts of water, 0.26 to 1.12 parts of slow-setting water-reducing agent, 0.2 to 0.8 parts of waterproofing agent, and 0.2 to 0.5 parts of mildewproofing agent.

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