Construction process of elastic material

Abstract

The application relates to the field of elastic ground decoration, and discloses a construction process method of elastic ground. The method comprises the following steps: (1) applying an interface agent on a base layer to obtain an interface agent layer; the interface agent is a plain cement slurry and / or a plain cement emulsion slurry; (2) laying dry-hard cement mortar semi-dry slurry on the interface agent layer to perform fine leveling construction, polishing a light receiving surface, and obtaining a dry-hard cement mortar layer; the mass ratio of dry-hard cement mortar to water in the dry-hard cement mortar semi-dry slurry is 100:7-11; the particle size of the dry-hard cement mortar ranges from 0.07 mm to 4.75 mm, and the gradation is continuous; (3) maintaining the dry-hard cement mortar layer, applying floor glue, and obtaining a floor glue layer; and (4) laying elastic ground on the floor glue layer. The method can meet the laying requirements of the elastic ground, reduce the coarse leveling process, save time and labor, and greatly reduce the cost.

Description

Technical Field

[0001] This invention relates to the field of resilient flooring decoration, and more specifically to a construction process for resilient flooring. Background Technology

[0002] With the continuous development of the building decoration industry, elastic decorative materials such as PVC flooring and rubber flooring have been widely used in commercial, medical, educational and residential settings due to their excellent properties such as comfortable feel, rich colors and wear and stain resistance.

[0003] The installation of this type of resilient flooring requires an extremely high degree of flatness in the subfloor. An uneven subfloor will lead to uneven stress on the flooring, resulting in wear, warping, and cracking at the seams over time, severely impacting its appearance and lifespan. Therefore, a high-standard leveling process must be performed on the subfloor before installation.

[0004] Currently, the most commonly used construction technique in the industry is the "layered leveling" method. Specifically, this involves first using cement mortar on the structural floor slab for preliminary "rough leveling" to correct significant unevenness in the base layer. However, the surface smoothness of the cement mortar leveling layer still falls far short of the requirements for elastic flooring materials. Therefore, after the cement mortar rough leveling layer has cured, a layer of self-leveling cement must be applied for "fine leveling." The self-leveling material, with its excellent fluidity, ultimately forms a highly smooth and strong ideal base layer.

[0005] In summary, the existing technical solutions have significant shortcomings: to meet the paving requirements of resilient flooring materials, two independent processes must be performed: "rough leveling with cement mortar" and "fine leveling with self-leveling compound." This layered leveling process is not only cumbersome and time-consuming, but also consumes a large amount of labor and materials, significantly increasing the overall construction cost.

[0006] Therefore, there is an urgent need in this field for a new ground leveling technology and method that can simplify procedures, improve efficiency, and reduce costs. Summary of the Invention

[0007] The purpose of this invention is to provide a construction process that can achieve a smooth, crack-free, and high surface tensile strength layer structure through one-time precision leveling, thereby improving efficiency and reducing costs.

[0008] To achieve the above objectives, the present invention provides a construction process for elastic flooring materials, the method comprising: (1) Apply an interface agent to the base layer to obtain an interface agent layer; the interface agent is plain cement slurry and / or plain cement emulsion slurry; (2) Lay dry-hard cement mortar semi-dry slurry on the interface agent layer for fine leveling construction, grind and polish the surface to obtain dry-hard cement mortar layer; the mass ratio of dry-hard cement mortar to water in the dry-hard cement mortar semi-dry slurry is 100:7-11; the particle size range of the dry-hard cement mortar is 0.07-4.75mm, and the gradation is continuous; (3) Curing the dry-hardened cement mortar layer, applying floor adhesive to obtain a floor adhesive layer; (4) Lay elastic flooring material on the floor adhesive layer.

[0009] The construction process of the elastic flooring material provided by this invention can meet the requirements for laying elastic flooring material, reduce the rough leveling process, save time and labor, and greatly reduce costs. Attached Figure Description

[0010] Figure 1 This is a gradation continuity diagram of dry-hard cement mortar I in this invention; Figure 2 This is a non-graded continuous diagram of dry-hard cement mortar II in this invention; Figure 3 This is a schematic diagram of the layer structure prepared using the method of the present invention. Detailed Implementation

[0011] The endpoints and any values ​​of the ranges disclosed herein are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoint values ​​of the various ranges, the endpoint values ​​of the various ranges and individual point values, and individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be considered as specifically disclosed herein.

[0012] As mentioned above, the present invention provides a construction process for elastic flooring materials, the method comprising: (1) Apply an interface agent to the base layer to obtain an interface agent layer; the interface agent is plain cement slurry and / or plain cement emulsion slurry; (2) Lay dry-hard cement mortar semi-dry slurry on the interface agent layer for fine leveling construction, grind and polish the surface to obtain dry-hard cement mortar layer; the mass ratio of dry-hard cement mortar to water in the dry-hard cement mortar semi-dry slurry is 100:7-11; the particle size range of the dry-hard cement mortar is 0.07-4.75mm, and the gradation is continuous; (3) Curing the dry-hardened cement mortar layer, applying floor adhesive to obtain a floor adhesive layer; (4) Lay elastic flooring material on the floor adhesive layer.

[0013] This invention specifically uses dry-hardened cement mortar for the construction of elastic flooring materials, which can achieve precise leveling. Furthermore, by using dry-hardened cement mortar with a specific particle size range and meeting the requirements of continuous gradation and compressive strength, a smooth surface suitable for adhesive elastic flooring materials can be achieved.

[0014] In this invention, the term "pouring and sweeping" refers to sweeping evenly after the interface agent has been poured onto the base layer.

[0015] In this invention, the particle size range refers to the upper and lower limits of the particle size of the dry-hardened cement mortar; the particles of the dry-hardened cement mortar can be regular or irregular in shape; the particle size refers to the straight-line distance between the two farthest ends of the particles of the dry-hardened cement mortar.

[0016] In this invention, continuous gradation refers to the characteristic of "continuous and uninterrupted" particle size distribution of aggregates (sand, fillers, and other granular components) in the mortar. That is, the particle size range from coarse to fine is fully covered, the particle content ratio of each size range is reasonable, and there are no obvious gaps or breaks. This invention provides an exemplary continuous gradation diagram of dry-hard cement mortar I, such as... Figure 1 As shown in the figure, the particle size distribution curve of the sieve residue is a smooth curve.

[0017] In a preferred embodiment, the compressive strength of the dry-hardened cement mortar is ≥25MPa.

[0018] In this invention, the compressive strength of the dry-hardened cement mortar refers to the 14-day compressive strength, which is obtained by testing according to GB / T50081-2019.

[0019] In a preferred embodiment, the thickness of the dry-hardened cement mortar layer is 20-100mm, for example, it can be any value between 20mm, 40mm, 60mm, 70mm, 80mm, 100mm or 20-100mm.

[0020] Preferably, the thickness of the interface agent layer is 0.5-3 mm.

[0021] Preferably, the thickness of the floor adhesive layer is 0.2-2mm.

[0022] Preferably, the base layer is a concrete base surface and / or a cement mortar base surface.

[0023] In a preferred embodiment, the method further includes: removing impurities from the substrate before applying the interface agent.

[0024] The present invention does not impose any particular requirements on the method of impurity removal, and those skilled in the art can perform the treatment according to known techniques in the field. For example, the surface of the substrate is cleaned of accumulated dust, laitance, oil, and other debris, and the substrate is moistened with water one day before applying the interface agent.

[0025] In a preferred embodiment, in step (1), the mass ratio of cement to water in the plain cement slurry is 1:0.4-0.6. The inventors have found that under these preferred conditions, the semi-rigid cement mortar can bond well with the substrate.

[0026] Preferably, in step (1), the mass ratio of cement, water and emulsion in the plain cement emulsion slurry is 1:0.1-0.5:0.03-0.4.

[0027] Preferably, the emulsion is white latex and / or chloroprene latex.

[0028] According to a preferred embodiment, the emulsion is white latex, and in the plain cement emulsion slurry, the mass ratio of the cement, the water and the white latex is 1:0.4-0.5:0.03-0.05.

[0029] According to another preferred embodiment, the emulsion is chloroprene latex, and in the plain cement emulsion slurry, the mass ratio of the cement, the water and the chloroprene latex is 1:0.1-0.15:0.3-0.4.

[0030] According to a preferred embodiment, in step (2), the dry-hardened cement mortar is laid when the interface agent layer is in a slurry state.

[0031] It should be noted that the state of the slurry refers to the slurry before it loses water and begins to set.

[0032] According to another preferred embodiment, in step (2), the fine leveling construction method includes manual fine leveling or machine fine leveling.

[0033] Preferably, the specific steps of the manual fine leveling include: S1. Wet reinforcement: Based on the thickness of the dry-hardened cement mortar layer, a portion of the semi-dry dry-hardened cement mortar is compacted and smoothed to create reinforcement strips. Specifically: At the base of the wall, install two wet reinforcing bars with an average width of 20-30cm. Starting from the center of the construction area, arrange the wet reinforcing bars in four mutually perpendicular directions; the spacing between adjacent wet reinforcing bars is 1-1.5m. S2. Leveling construction: The semi-dry slurry is laid in the area of ​​the reinforcing bar reference. The thickness of the semi-dry slurry is 10-16mm higher than the thickness of the reinforcing bar reference. After compacting, it is leveled with a screed according to the reinforcing bar reference (after compaction and leveling, it is the same height as the thickness of the reinforcing bar) and rubbed evenly.

[0034] Preferably, the specific operation steps of the machine fine leveling include: a. Constructing a reference starting platform: Lay the semi-dry dry cement mortar onto the base surface of the machine construction starting point, tamp it down, scrape it flat, and rub it evenly. Using a level laser instrument, based on the thickness of the dry cement mortar layer, construct a starting platform no smaller than the size of the leveling machine. b. Machine leveling construction: Starting from the starting platform, lay the dry-hard cement mortar semi-dry slurry according to the machine leveling path. The thickness of the dry-hard cement mortar semi-dry slurry is 8-12mm higher than the starting platform. Lift the machine to the starting platform, adjust the machine leveling benchmark, set the machine laser position, and start the machine leveling construction to obtain the machine-completed layer. c. Surrounding leveling: For areas that cannot be worked on by machine, perform manual fine leveling work, using the thickness of the layer completed by machine as a benchmark, tamp, scrape, and rub evenly.

[0035] This invention does not impose any particular requirements on the method of polishing and finishing the surface; those skilled in the art can choose from known techniques. For example, an electric finishing machine is used to polish and finish the surface after the fine leveling work (if a smooth surface cannot be achieved, an emulsion can be used in conjunction with polishing) to obtain a dry-hardened cement mortar layer.

[0036] Preferably, the method in step (3) further includes: cleaning the cured, hardened cement mortar layer before applying the floor adhesive. Under this preferred condition, the dust on the surface of the cured, hardened cement mortar layer can be removed, solving the problem of dust being difficult to remove.

[0037] This invention does not impose any particular requirements on the method of cleaning and removing impurities; those skilled in the art can choose according to known techniques. For example, after cleaning the impurities, a vacuum cleaner is used to remove the dust.

[0038] The floor adhesive mentioned in this invention refers to a special floor adhesive that is compatible with elastic flooring materials.

[0039] In a preferred embodiment, in step (3), the method further includes curing the dry-hardened cement mortar layer until the surface moisture content is ≤8wt%.

[0040] Preferably, the maintenance is selected from at least one of water spraying natural maintenance, spray film maintenance, and plastic film wrapping maintenance.

[0041] This invention does not impose special requirements on the curing conditions; it is sufficient to cure the dry-hardened cement mortar layer until the surface moisture content is ≤8wt%. This invention will not be described in detail here, and those skilled in the art should not interpret this as a limitation of the invention.

[0042] In this invention, the surface moisture content refers to the ratio (expressed as a percentage) of the mass of water contained in the surface layer (3-5 mm below the surface) to the mass of the dry material in the surface layer. It is a core indicator for measuring the dryness of the mortar layer surface.

[0043] Preferably, in step (3), the floor adhesive is selected from at least one of chloroprene rubber type adhesive, reactive resin type adhesive, synthetic resin type adhesive, and dispersion type adhesive.

[0044] Preferably, in step (4), the material of the elastic flooring is selected from at least one of polyvinyl chloride, flax, and rubber.

[0045] More preferably, in step (4), the 90° peel strength of the elastic flooring material is ≥1.0 N / mm.

[0046] This invention does not impose any particular requirements on the method of laying the resilient flooring material; those skilled in the art can perform the laying according to known techniques. Exemplarily, the process involves sequentially marking lines for positioning, applying adhesive, allowing the adhesive to dry, laying the flooring, treating the joints, and curing. This invention will not be described in detail here, and those skilled in the art should not construe this as a limitation of the invention.

[0047] This invention provides, by way of example, a schematic diagram of a layer structure prepared using the method of this invention, such as... Figure 3 As shown.

[0048] The present invention will be described in detail below through examples. Unless otherwise specified, specific experimental steps or conditions in the following examples can be performed according to known experimental steps or conditions described in the literature in this field. Unless otherwise specified, the raw materials or instruments used are commercially available. Unless otherwise specified, the reaction temperature in the following examples is at room temperature, which refers to 25±2℃.

[0049] Dry-hard cement mortar I: Gradiented continuously, with a particle size range of 0.07-4.75 mm and a compressive strength of 25 MPa. This invention provides a gradation diagram of dry-hard cement mortar I, as shown below. Figure 1 As shown in the figure, the particle size distribution curve of the sieve residue is a smooth curve.

[0050] Dry-hard cement mortar II: non-graded continuous, with a particle size of 0.07-4.75 mm and a compressive strength of 25 MPa. This invention provides a non-graded continuous diagram of dry-hard cement mortar II, as shown below. Figure 2 As shown in the figure, the particle size distribution curve of the sieve residue is stepped.

[0051] Dry-hard cement mortar semi-dry paste I: The mass ratio of dry-hard cement mortar I to water is 100:9.

[0052] Dry-hard cement mortar semi-dry paste II: The mass ratio of dry-hard cement mortar II to water is 100:9.

[0053] Dry-hard cement mortar slurry III: The mass ratio of dry-hard cement mortar I to water is 100:15.

[0054] Plain cement slurry I: The mass ratio of cement to water is 1:0.5.

[0055] Plain cement slurry II: The mass ratio of cement to water is 1:1.

[0056] Plain cement emulsion slurry: The mass ratio of cement: water: white latex is 1:0.5:0.04.

[0057] Floor adhesive: Dispersible adhesive, model M760, purchased from Meisheng Yaheng Company.

[0058] Resilient flooring: PVC flooring, made of polyvinyl chloride, purchased from Suzhou Hongyixin Building Materials & Decoration Co., Ltd.

[0059] Example 1 (1) Remove the accumulated dust, laitance, oil stains and debris from the concrete base surface. After wetting the concrete base surface with water one day in advance, pour and sweep the plain cement slurry I to obtain an interface agent layer with a thickness of 2mm. (2) When the interface agent layer is in the state of slurry, lay dry hard cement mortar semi-dry slurry I for manual fine leveling, and use an electric surface finishing machine to grind and polish the surface after fine leveling (if a smooth surface cannot be achieved, emulsion can be used for grinding) to obtain a dry hard cement mortar layer with a thickness of 40mm. The specific steps for manual fine leveling are as follows: S1. Wet reinforcement strip: Based on the thickness of the dry-hardened cement mortar layer, a portion of the semi-dry dry-hardened cement mortar slurry I is compacted and smoothed to create the reinforcement strip reference. Specifically: Two wet reinforcing bars with an average width of 25cm are installed at the base of the wall. Starting from the center of the construction area, the wet reinforcing bars are arranged in four mutually perpendicular directions; the spacing between adjacent wet reinforcing bars is 1m. S2. Leveling construction: Lay the semi-dry dry cement mortar I within the area of ​​the reinforcing bar reference, with the thickness of the semi-dry dry cement mortar I being 15mm higher than the thickness of the reinforcing bar reference; after compacting, use a screed to scrape and smooth it according to the reinforcing bar reference. (3) Sprinkle water to naturally cure the dry hard cement mortar layer until the surface moisture content is ≤8wt%, clean impurities, vacuum the dust, apply floor adhesive to obtain a floor adhesive layer with a thickness of 1mm; (4) On the floor adhesive layer, the following steps are performed in sequence: marking the lines, applying adhesive, drying the adhesive, laying the floor, treating the joints, and curing the floor to lay the elastic floor material.

[0060] Example 2 (1) Remove the accumulated dust, laitance, oil stains and debris from the cement mortar base surface. After wetting it with water one day in advance, pour and sweep the plain cement emulsion slurry onto the cement mortar base surface to obtain an interface agent layer with a thickness of 3mm. (2) When the interface agent layer is in the state of slurry, lay dry hard cement mortar semi-dry slurry I for machine fine leveling, and use an electric surface finishing machine to grind and polish the surface after fine leveling (if a smooth surface cannot be achieved, emulsion can be used for grinding) to obtain a dry hard cement mortar layer with a thickness of 100mm. The specific operating steps for the machine's fine leveling are as follows: a. Make a reference starting platform: Lay the semi-dry dry cement mortar I onto the base surface of the machine construction starting point, tamp it down, scrape it flat and rub it evenly. Use a level laser instrument to make a starting platform no smaller than the size of the leveling machine, based on the thickness of the dry cement mortar layer. b. Machine leveling construction: Starting from the starting platform, lay dry hard cement mortar semi-dry slurry I according to the machine leveling path. The thickness of dry hard cement mortar semi-dry slurry I is 10mm higher than the starting platform. Lift the machine to the starting platform, adjust the machine leveling benchmark, set the machine laser position, and start the machine leveling construction to obtain the machine construction completed layer. c. Surrounding leveling: Manual fine leveling is carried out in areas where the machine cannot work. The thickness of the layer completed by the machine is used as a benchmark. The layer is compacted, scraped, and rubbed evenly. (3) Sprinkle water to naturally cure the dry hard cement mortar layer until the surface moisture content is ≤8wt%, clean impurities, vacuum the dust, apply floor adhesive to obtain a floor adhesive layer with a thickness of 2mm; (4) On the floor adhesive layer, the following steps are performed in sequence: marking the lines, applying adhesive, drying the adhesive, laying the floor, treating the joints, and curing the floor to lay the elastic floor material.

[0061] Example 3 (1) Remove the accumulated dust, laitance, oil stains and debris from the concrete base surface. After wetting the concrete base surface with water one day in advance, pour and sweep the neat cement slurry II onto the concrete base surface to obtain an interface agent layer with a thickness of 2mm. (2) When the interface agent layer is in the state of slurry, lay dry hard cement mortar semi-dry slurry I for manual fine leveling, and use an electric surface finishing machine to grind and polish the surface after fine leveling (if a smooth surface cannot be achieved, emulsion can be used for grinding) to obtain a dry hard cement mortar layer with a thickness of 40mm. The specific steps for manual fine leveling are as follows: S1. Wet reinforcement strip: Based on the thickness of the dry-hardened cement mortar layer, a portion of the semi-dry dry-hardened cement mortar slurry I is compacted and smoothed to create the reinforcement strip reference. Specifically: Two wet reinforcing bars with an average width of 25cm are installed at the base of the wall. Starting from the center of the construction area, the wet reinforcing bars are arranged in four mutually perpendicular directions; the spacing between adjacent wet reinforcing bars is 1m. S2. Leveling construction: Lay the semi-dry dry cement mortar I within the area of ​​the reinforcing bar reference, with the thickness of the semi-dry dry cement mortar I being 15mm higher than the thickness of the reinforcing bar reference; after compacting, use a screed to scrape and smooth it according to the reinforcing bar reference. (3) Sprinkle water to naturally cure the dry hard cement mortar layer until the surface moisture content is ≤8wt%, clean impurities, vacuum the dust, apply floor adhesive to obtain a floor adhesive layer with a thickness of 1mm; (4) On the floor adhesive layer, the following steps are performed in sequence: marking the lines, applying adhesive, drying the adhesive, laying the floor, treating the joints, and curing the floor to lay the elastic floor material.

[0062] Comparative Example 1 (1) Base cleaning: Remove dust, oil stains and loose particles from the ground. After sweeping with a broom, vacuum up any remaining impurities. (2) Mixing: First, pour the cement and sand into the mixer and dry mix evenly. Then slowly add water (or admixture solution) and mix for ≥3 minutes until the mortar is a uniform paste without lumps or bleeding. After standing for 5 minutes, mix evenly again before use. (3) Spreading mortar: Spread the mixed cement mortar along the ground baseline, and control the thickness evenly at 35mm (thickness control points can be set in advance with steel bar ends at 2m intervals). After spreading it with a shovel, use a 2m screed to scrape it along the control points to ensure that the surface flatness deviation is ≤5mm / 2m. (4) Vibration to compact: Use a plate vibrator (or vibrator) to vibrate along the scraping direction, with a vibration interval of ≤200mm, until the mortar surface is covered with slurry and no air bubbles emerge; use a wooden trowel to compact the edges and corners to avoid hollow areas; (5) Polishing before initial setting: When the mortar has initially set (there is no obvious indentation when pressed with a finger, about 3 hours, and the ambient temperature is 20℃), polish it for the first time with an iron trowel, applying even pressure to eliminate surface pitting; polish it for the second time before final setting (there is a slight mark when pressed with a finger, about 7 hours) to make the surface smooth and flat, without trowel marks, and obtain a cement mortar rough leveling layer with a thickness of 35mm. (6) Curing: After calendering, cover with plastic film for 24 hours to keep moist and maintain the curing time for ≥7 days (spray water twice a day in hot weather, and take insulation measures in cold weather to avoid freezing). (7) The cement mortar coarse leveling layer has completed its curing period and the surface moisture content is ≤8wt%. Grind the surface of the coarse leveling layer with a grinder (equipped with diamond grinding discs) to remove laitance and impurities. After vacuuming, apply a penetrating interface agent (coating amount 0.15kg / m). 2After the interface agent has dried to the touch (approximately 1.5 hours, when it is no longer sticky to the touch), the self-leveling compound can be applied. (8) Pour the mixed self-leveling slurry along one side of the ground. The slurry will flow and spread naturally. The thickness should be controlled at 5mm (which can be calibrated by pre-reserved control points on the ground). For areas where the flow is not smooth, use a toothed scraper (tooth height 5mm) to help smooth the surface and ensure that the overall thickness is uniform. After the slurry is spread, immediately roll a defoaming roller (roller diameter 200mm) on the surface of the slurry with a spacing of ≤300mm to remove the air bubbles generated during mixing and spreading, and avoid pinholes and pitting on the surface to obtain a 5mm thick self-leveling fine leveling layer. (9) Sprinkle water to naturally cure the self-leveling fine leveling layer until the surface moisture content is ≤3wt%, clean impurities, vacuum the dust, apply floor adhesive to obtain a floor adhesive layer with a thickness of 1mm. (10) On the floor adhesive layer, the following steps are performed in sequence: marking the lines for positioning, applying adhesive, drying the adhesive, laying the floor, treating the joints, and curing the floor to lay the elastic floor material.

[0063] Comparative Example 2 (1) Remove the accumulated dust, laitance, oil stains and debris from the concrete base surface. After wetting the concrete base surface with water one day in advance, pour and sweep the plain cement slurry I to obtain an interface agent layer with a thickness of 2mm. (2) When the interface agent layer is in the state of slurry, lay dry hard cement mortar semi-dry slurry II for manual fine leveling, and use an electric surface finishing machine to grind and polish the surface after fine leveling (if a smooth surface cannot be achieved, emulsion can be used for grinding) to obtain a dry hard cement mortar layer with a thickness of 40mm. The specific steps for manual fine leveling are as follows: S1. Wet reinforcement strip: Based on the thickness of the dry-hardened cement mortar layer, a portion of the semi-dry dry-hardened cement mortar slurry I is compacted and smoothed to create the reinforcement strip reference. Specifically: Two wet reinforcing bars with an average width of 25cm are installed at the base of the wall. Starting from the center of the construction area, the wet reinforcing bars are arranged in four mutually perpendicular directions; the spacing between adjacent wet reinforcing bars is 1m. S2. Leveling construction: Lay the semi-dry dry cement mortar I within the area of ​​the reinforcing bar reference, with the thickness of the semi-dry dry cement mortar I being 15mm higher than the thickness of the reinforcing bar reference; after compacting, use a screed to scrape and smooth it according to the reinforcing bar reference. (3) Sprinkle water to naturally cure the dry hard cement mortar layer until the surface moisture content is ≤8wt%, clean impurities, vacuum the dust, apply floor adhesive to obtain a floor adhesive layer with a thickness of 1mm; (4) On the floor adhesive layer, the following steps are performed in sequence: marking the lines, applying adhesive, drying the adhesive, laying the floor, treating the joints, and curing the floor to lay the elastic floor material.

[0064] Comparative Example 3 (1) Remove the accumulated dust, laitance, oil stains and debris from the concrete base surface. After wetting the concrete base surface with water one day in advance, pour and sweep the plain cement slurry I to obtain an interface agent layer with a thickness of 2mm. (2) When the interface agent layer is in the state of slurry, lay dry hard cement mortar slurry III for manual fine leveling. Use an electric surface finishing machine to grind and polish the surface after fine leveling (if a smooth surface cannot be achieved, emulsion can be used for grinding) to obtain a dry hard cement mortar layer with a thickness of 40mm. The specific steps for manual fine leveling are as follows: S1. Wet reinforcement strip: Based on the thickness of the dry-hardened cement mortar layer, a portion of the semi-dry dry-hardened cement mortar slurry I is compacted and smoothed to create the reinforcement strip reference. Specifically: Two wet reinforcing bars with an average width of 25cm are installed at the base of the wall. Starting from the center of the construction area, the wet reinforcing bars are arranged in four mutually perpendicular directions; the spacing between adjacent wet reinforcing bars is 1m. S2. Leveling construction: Lay the semi-dry dry cement mortar I within the area of ​​the reinforcing bar reference, with the thickness of the semi-dry dry cement mortar I being 15mm higher than the thickness of the reinforcing bar reference; after compacting, use a screed to scrape and smooth it according to the reinforcing bar reference. (3) Sprinkle water to naturally cure the dry hard cement mortar layer until the surface moisture content is ≤8wt%, clean impurities, vacuum the dust, apply floor adhesive to obtain a floor adhesive layer with a thickness of 1mm; (4) On the floor adhesive layer, the following steps are performed in sequence: marking the lines, applying adhesive, drying the adhesive, laying the floor, treating the joints, and curing the floor to lay the elastic floor material.

[0065] Test case The following tests were performed on the above embodiments and comparative examples: 1. Surface pull-out strength (MPa) of dry-hardened cement mortar layer: The pull-out method was used, with 3 measuring points selected, cut to 4mm from the base layer, and tested using a special pull-out instrument.

[0066] 2. Test method for 14-day compressive strength of the layer structure before applying floor adhesive: The test was conducted according to JGJ / T 23-2011.

[0067] 3. Test method for surface pull-out strength of the layer structure before applying floor adhesive: The pull-out method is used. Three test points are selected, and the surface layer is cut to 4mm. The results are obtained using a special pull-out instrument.

[0068] 4. Test method for surface flatness of elastic flooring: Measured using a 2m straightedge and a wedge gauge.

[0069] 5. Test method for 90° peel force of elastic flooring: Cut an elastic flooring material with a width of 5mm and a length of 550mm, drill a hole at one end, and then use a tensile scale to pull it at 90° to obtain the reading.

[0070] 6. The price of dry-hardened cement mortar is 300 yuan / ton, and the consumption is 2kg / m³. 2 *mm; The price of cement mortar is 250 yuan / ton, and the consumption is 2kg / m². 2 *mm; and the price of self-leveling compound is 1000 yuan / ton, with a consumption of 1.7kg / m². 2 *mm calculates material costs.

[0071] The results are shown in Table 1.

[0072] Table 1

[0073] As can be seen from the results in Table 1, the construction process of the elastic flooring material of the present invention can achieve fine leveling in one step, reduce the rough leveling process, save time and labor and greatly reduce costs, and can produce a layered structure with a smooth surface, no cracks and high surface tensile strength.

[0074] The preferred embodiments of the present invention have been described in detail above; however, the present invention is not limited thereto. Within the scope of the inventive concept, various simple modifications can be made to the technical solutions of the present invention, including combinations of various technical features in any other suitable manner. These simple modifications and combinations should also be considered as the content disclosed in the present invention and are all within the protection scope of the present invention.

Claims

1. A construction method for an elastic flooring material, characterized in that, The method includes: (1) Apply an interface agent to the base layer to obtain an interface agent layer; the interface agent is plain cement slurry and / or plain cement emulsion slurry; (2) Lay dry-hard cement mortar semi-dry slurry on the interface agent layer for fine leveling construction, grind and polish the surface to obtain dry-hard cement mortar layer; the mass ratio of dry-hard cement mortar to water in the dry-hard cement mortar semi-dry slurry is 100:7-11; the particle size range of the dry-hard cement mortar is 0.07-4.75mm, and the gradation is continuous; (3) Curing the dry-hardened cement mortar layer, applying floor adhesive to obtain a floor adhesive layer; (4) Lay elastic flooring material on the floor adhesive layer.

2. The method according to claim 1, characterized in that, The compressive strength of the dry-hardened cement mortar is ≥25MPa; And / or, the thickness of the dry-hardened cement mortar layer is 20-100 mm.

3. The method according to claim 1 or 2, characterized in that, The thickness of the interface agent layer is 0.5-3 mm; And / or, the thickness of the floor adhesive layer is 0.2-2mm.

4. The method according to claim 1 or 2, characterized in that, In step (1), the mass ratio of cement to water in the plain cement slurry is 1:0.4-0.

6.

5. The method according to claim 1 or 2, characterized in that, In step (1), the mass ratio of cement, water and emulsion in the plain cement emulsion slurry is 1:0.1-0.5:0.03-0.

4.

6. The method according to claim 5, characterized in that, The emulsion is white latex and / or chloroprene latex.

7. The method according to claim 1 or 2, characterized in that, In step (2), the fine leveling construction method includes manual fine leveling or machine fine leveling.

8. The method according to claim 1 or 2, characterized in that, In step (3), the method further includes curing the dry-hardened cement mortar layer until the surface moisture content is ≤8wt%.

9. The method according to claim 1 or 2, characterized in that, In step (3), the floor adhesive is selected from at least one of neoprene type adhesives, reactive resin type adhesives, synthetic resin type adhesives, and dispersion type adhesives.

10. The method according to claim 1 or 2, characterized in that, In step (4), the material of the elastic flooring is selected from at least one of polyvinyl chloride, flax, and rubber; And / or, the 90° peel strength of the resilient flooring material is ≥1.0 N / mm.

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