PVA fiber concrete carborundum floor

Abstract

The utility model relates to the technical field of building construction, in particular to a PVA fiber concrete carborundum floor. Comprising a base layer, a cushion layer is arranged on the base layer, a graded gravel layer is arranged between the base layer and the cushion layer, a reinforcing layer is fixedly arranged on the cushion layer, a carborundum wear-resistant layer is arranged on the reinforcing layer, the cushion layer is a concrete layer, and the reinforcing layer is a PVA fiber concrete layer. A certain deformation space is reserved for expansion of soil of the base layer through the graded gravel layer laid between the base layer and the cushion layer, the working conditions of the base layer and a soil base are improved, meanwhile, the PVA fiber concrete layer is adopted, the breaking strength and bending toughness of a reinforcing layer are improved, and the service life of the carborundum ground is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of building construction, in particular to a PVA fiber concrete emery ground. Background Art

[0002] PVA fiber is a synthetic fiber made from high-quality polyvinyl alcohol with a high degree of polymerization. Emery flooring offers advantages such as high wear resistance, high compression resistance, easy cleaning, and economical durability. Emery contains specially selected wear-resistant aggregates and is commonly used on concrete floors. It is widely used in garages, warehouses, and other areas.

[0003] In some areas where the soil is slightly expansive soil, the traditional emery ground surface cracks more seriously because the slightly expansive soil easily expands when it comes into contact with water and shrinks due to water loss, which reduces the structural strength of the building and affects the appearance of the ground. Summary of the Invention

[0004] In order to solve the problem of serious cracking of traditional corundum floors, the utility model proposes a PVA fiber concrete corundum floor. By laying a graded sand and gravel layer between the base layer and the cushion layer, a certain deformation space is reserved for the expansion of the base soil, thereby improving the working conditions of the base layer and the soil foundation. At the same time, a PVA fiber concrete layer is used to improve the flexural strength and bending toughness of the reinforcement layer, thereby increasing the service life of the corundum floor.

[0005] In order to achieve the above purpose, the technical solution of the utility model is:

[0006] A PVA fiber-concrete corundum floor comprises a base layer, a cushion layer disposed on the base layer, a graded sand and gravel layer disposed between the base layer and the cushion layer, a reinforcement layer fixedly disposed on the cushion layer, and a corundum wear-resistant layer disposed on the reinforcement layer. The base layer is a concrete layer, and the reinforcement layer is a PVA fiber-concrete layer. The reinforcement layer is a PVA fiber-concrete layer formed by mixing PVA fibers into concrete. The graded sand and gravel layer is first laid on the laid base layer, evenly spread on the surface of the base layer, and then leveled and compacted.

[0007] Furthermore, the length of the PVA fiber is 6-12 mm, the diameter is 20-50 μm, and the aspect ratio of the PVA fiber is 300:1.

[0008] Furthermore, the compaction degree of the base layer is 92%-97%, the thickness is 200-300 mm, and the base layer is formed by mixing slaked lime powder and undisturbed soil in a certain proportion, wherein the ratio of slaked lime powder to undisturbed soil is 2:8.

[0009] Furthermore, the concrete in the cushion layer is C15 concrete with a thickness of 50-150 mm.

[0010] Furthermore, the graded sand and gravel layer uses graded sand and gravel with a maximum particle size of less than or equal to 50 mm, a compaction degree of 90%-97%, and a thickness of 100-200 mm.

[0011] Furthermore, the concrete in the reinforcement layer is C30 concrete with a thickness of 100-300 mm.

[0012] Furthermore, the thickness of the diamond wear-resistant layer is 3-5 mm.

[0013] Furthermore, the cushion layer is provided with two opposing channel steels, with their opposing sides contacting the sidewalls of the reinforcement layer. A reinforcing rib is inserted through the middle of the channel steel, with one end of the rib extending into the reinforcement layer. A through hole is provided in the middle of the channel steel for the rib to pass through, and the rib is positioned appropriately before the reinforcement layer is laid. A spacer bar is provided on the side of the two channel steels facing away from each other, and the spacer bar is placed during the cushion layer laying.

[0014] Through the above technical solution, the beneficial effects of the utility model are:

[0015] 1. The graded sand and gravel layer laid between the base layer and the cushion layer of the utility model leaves a certain deformation space for the expansion of the base soil, improves the working conditions of the base and the soil foundation, and adopts the structure of the PVA fiber concrete layer to improve the flexural strength and bending toughness of the reinforcement layer, has better crack control ability, can significantly reduce the occurrence of ground cracks, and reduce the subsequent maintenance costs.

[0016] 2. The utility model has the characteristics of safety and applicability, has good promotion and practical value, can be widely used in ground treatment of garages, warehouses, etc., and can produce good economic benefits after application. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural schematic diagram of a PVA fiber concrete emery floor according to the present invention.

[0018] The numbers in the attached figure are: 1 for base layer, 2 for cushion layer, 3 for graded sand and gravel layer, 4 for reinforcement layer, 5 for corundum wear-resistant layer, 6 for channel steel, 7 for reinforcing ribs, and 8 for limiting steel bars. DETAILED DESCRIPTION

[0019] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0020] like Figure 1As shown, this embodiment provides a PVA fiber concrete corundum floor, including a base layer 1, a cushion layer 2 is provided on the base layer 1, a graded sand and gravel layer 3 is provided between the base layer 1 and the cushion layer 2, a reinforcement layer 4 is fixedly provided on the cushion layer 2, and a corundum wear-resistant layer 5 is provided on the reinforcement layer 4, and the thickness of the corundum wear-resistant layer 5 is 3-5 mm.

[0021] Specifically, the base layer 1 has a compaction degree of 92%-97% and a thickness of 200-300 mm. In this embodiment, the base layer 1 is formed by mixing slaked lime powder and undisturbed soil in a certain ratio, wherein the ratio of slaked lime powder to undisturbed soil is 2:8, and is compacted layer by layer, with a compaction degree of 94% and a thickness of 300 mm.

[0022] Specifically, the cushion layer 2 is a concrete layer, and the cushion layer 2 adopts C15 concrete, and has a thickness of 50-150 mm. In this embodiment, the thickness of the cushion layer 2 is 100 mm.

[0023] Specifically, the graded sand and gravel layer 3 uses graded sand and gravel with a maximum particle size of less than or equal to 50 mm, a compaction degree of 90%-97%, and a thickness of 100-200 mm. In this embodiment, the compaction degree of the graded sand and gravel layer 3 is 97% and the thickness is 100 mm.

[0024] Specifically, the reinforcement layer 4 is a PVA fiber concrete layer formed by mixing PVA fibers into concrete. The PVA fibers have a length of 6-12 mm, a diameter of 20-50 μm, and an aspect ratio of 300:1. The concrete in the reinforcement layer 4 is C30 concrete with a thickness of 100-300 mm. In this embodiment, the PVA fibers have a length of 12 mm, a diameter of 40 μm, and an aspect ratio of 300:1; the thickness of the reinforcement layer 4 is 200.

[0025] Furthermore, two opposing channel steels 6 are provided on the cushion layer 2, with opposing sides of the two channel steels 6 contacting the side walls of the reinforcement layer 4. A reinforcing rib 7 is provided through the middle of the channel steel 6, with one end of the reinforcing rib 7 extending into the reinforcement layer 4. In this embodiment, a No. 20 channel steel 6 is supported at the upper end of the cushion layer 2, with a φ22@500 hole drilled at the center elevation of the channel steel 6. The φ20 reinforcing rib 7 is placed before the PVA fiber concrete is poured.

[0026] The specific implementation steps of this utility model are:

[0027] Step 1: After the compaction coefficient of the base layer 1 is greater than or equal to 94%, evenly lay the graded sand and gravel layer 3 on the base layer 1, and then level and compact it.

[0028] Step 2: Pour a C15 concrete cushion layer 2 with a thickness of 100 mm on the graded sand and gravel layer 3.

[0029] Step 3: Clean the debris on the surface of the cushion layer 2. There must be no loose particles and garbage, and sprinkle water on the cleaned concrete cushion layer 2.

[0030] Step 4: After the cushion layer 2 is processed, the template edge is marked and positioned. In order to ensure the construction quality of the floor construction joint, the template edge of the construction joint can be moved 30-50mm to the unconstructed area. After removing the formwork, use a cutting machine to cut the seam according to the original construction joint edge to ensure that the construction joint is straight.

[0031] Step 5: After the slab edge is positioned, use No. 20 channel steel 6 to support the formwork. Drill a φ22@500 hole in the center elevation of the channel steel 6, and place the φ20 reinforcement rib 7 before pouring the reinforcement layer 4.

[0032] Step 6: PVA fiber-infused concrete is laid on cushion layer 2 to form a 200mm thick PVA fiber concrete layer. This layer is manually leveled. After leveling, a φ8@200×200 steel mesh is placed on top of the PVA fiber concrete layer. This mesh is manually stepped 20-40mm below the surface layer, followed by a secondary leveling process. The mesh is then reinforced with steel and finally leveled using a laser screed. The concrete grade used is C30, with an on-site slump of 180±20mm. The minimum tensile strength of the PVA fiber is 1560MPa, and the minimum elongation at break is 6.5%. The volume content of PVA fiber in C30 concrete is 1.5%.

[0033] Step 7: When the concrete in the PVA fiber concrete layer begins to set, the wear-resistant floor construction can be carried out. First, use a grinder to perform rough grinding, that is, the main goal is to flatten and compact a large area as a whole.

[0034] Step 8: When a person sinks about 5mm on the concrete surface, you can start spreading the emery for the first time. The first spreading amount is 2 / 3 of the total amount. Spread the emery wear-resistant material evenly on the concrete surface and smooth it with a wooden trowel or a scraper. After the wear-resistant material absorbs a certain amount of water, grind it with a grinder to disperse it and combine it with the concrete slurry.

[0035] Step 9: The second spreading is 1 / 3 of the total amount. First use a 3-meter scraper to measure the level and adjust the unevenness of the first spreading. The second spreading direction should be perpendicular to the first. Immediately after spreading, use a wooden trowel to smooth and polish it.

[0036] Step 10: Use a trowel to finish the diamond abrasive floor. The trowel is operated in a crisscross pattern (more than 3 times). The edges and corners are polished in an orderly and unidirectional manner with a manual steel trowel to avoid the appearance of trowel marks. The surface construction is completed.

[0037] Step 11: Maintenance. After the construction of the diamond abrasive floor is completed, in order to prevent moisture loss and control the temperature of the concrete, and ensure the steady growth of the strength of the wear-resistant material, the wear-resistant floor should be covered with a film 3 hours after construction and maintained moisturizing for 7 days.

[0038] Step 12: Cutting seams. Within 2-3 days after the construction of the diamond abrasive floor is completed, sawing seams shall be carried out according to the column spacing (the vertical and horizontal requirements are ≤6m). The sawing seams must be marked, and the cutting depth shall not be less than 1 / 3 of the floor thickness. The cutting seam width is 5mm, and the deep seam width is 10-20mm.

[0039] Step 13: Fill the joints. Before filling the joints, you need to use a hook to remove small stones, debris, etc. in the joints, and then use an industrial vacuum cleaner to remove the dust in the joints. If necessary, rinse with water. Fill the joints after drying, and use special caulking glue to fill the joints.

[0040] The embodiments described above are only preferred embodiments of the present invention and do not limit the scope of implementation of the present invention. Therefore, any equivalent changes or modifications made based on the structure, features and principles described in the patent scope of the present invention should be included in the scope of the patent application of the present invention.

Claims

1. A PVA fiber concrete corundum floor, comprising a base layer (1), characterized in that: A cushion layer (2) is provided on the base layer (1), a graded sand and gravel layer (3) is provided between the base layer (1) and the cushion layer (2), a reinforcement layer (4) is fixedly provided on the cushion layer (2), and a diamond wear-resistant layer (5) is provided on the reinforcement layer (4); The cushion layer (2) is a concrete layer, and the reinforcement layer (4) is a PVA fiber concrete layer.

2. The PVA fiber concrete corundum floor according to claim 1, characterized in that: The length of the PVA fiber is 6-12 mm, the diameter is 20-50 μm, and the aspect ratio of the PVA fiber is 300:

1.

3. The PVA fiber concrete corundum floor according to claim 1, characterized in that: The compaction degree of the base layer (1) is 92%-97%, and the thickness is 200-300 mm.

4. The PVA fiber concrete corundum floor according to claim 1, characterized in that: The concrete in the cushion layer (2) is C15 concrete with a thickness of 50-150 mm.

5. The PVA fiber concrete corundum floor according to claim 1, characterized in that: The graded sand and gravel layer (3) uses graded sand and gravel with a maximum particle size of less than or equal to 50 mm, a compaction degree of 90%-97%, and a thickness of 100-200 mm.

6. The PVA fiber concrete corundum floor according to claim 1, characterized in that: The concrete in the reinforcement layer (4) is C30 concrete with a thickness of 100-300 mm.

7. The PVA fiber concrete corundum floor according to claim 1, characterized in that: The thickness of the diamond wear-resistant layer (5) is 3-5 mm.

8. The PVA fiber concrete corundum floor according to claim 1, characterized in that: Two opposing channel steels (6) are provided on the cushion layer (2), and opposite sides of the two channel steels (6) contact the side walls of the reinforcement layer (4). A reinforcing rib (7) is passed through the middle of the channel steel (6), and one end of the reinforcing rib (7) extends into the reinforcement layer (4).

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