Non-woven quilting cement-based composite material blanket with impermeable backing bottom film

Abstract

The utility model discloses a backing bottom film impermeable type non-woven quilting seam cement-based composite material blanket, which belongs to the technical field of cement blankets and comprises a cement blanket body, the cement blanket body comprises a backing impermeable layer, an opening and closing layer, a three-dimensional grid layer, a dry concrete mixture core layer and a cover surface layer, and folded edges are arranged on two sides of the backing impermeable layer. The edge of the folded edge is fixed with the backing impermeable layer through heat bonding; a plurality of sections of pipe cavities are formed on the inner sides of the folded edges through dispensing; the opening and closing layer is coated on the top surface of the backing impermeable layer; the opening and closing layer is formed by epoxy resin adhesive or butyl rubber adhesive; the three-dimensional grid layer is adhered to the top surface of the opening and closing layer; the space between the three-dimensional grid layers is filled with the dry concrete mixture core layer; the cover surface layer is attached to the top surface of the dry concrete mixture core layer; the backing bottom film anti-seepage type non-woven quilting seam cement-based composite material blanket is high in tensile strength and bending strength and capable of achieving the long-term anti-seepage effect.

Description

Technical Field

[0001] This utility model specifically relates to a backing membrane impermeable nonwoven quilted cement-based composite material blanket, belonging to the field of cement blanket technology. Background Technology

[0002] Cement blankets are made by pre-filling cement-based powder into the pores of a three-dimensional spacer fabric, then hydrating the cement by sprinkling water, and hardening it in a short time to form a thin concrete layer with both mechanical and durability properties. However, existing cement blankets have low tensile and flexural strength after hardening. To address this, Chinese Patent Publication No. CN118993663B discloses a cement blanket and its preparation method, which improves the tensile and flexural strength of the cement blanket by modifying the cement matrix composition. Another example is Chinese Patent Publication No. CN118596663A. A carbon fiber reinforced impermeable cement blanket and its processing technology are disclosed. The structure enhances the bending strength of the cement blanket and uses a cement-based penetrating crystalline waterproof material to improve the impermeability of the carbon fiber reinforced impermeable cement blanket. However, during the construction of the cement blanket, it is necessary to fix two adjacent cement blankets with U-shaped ground nails to make the adjacent cement blankets and the cement blanket and the laying surface form a whole. During the construction of the above-mentioned U-shaped ground nails, the impermeable surface is easily damaged, which leads to leakage at the edge of the cement blanket. Moreover, since the cement matrix is ​​relatively thin, it is impossible to achieve a long-term impermeability effect by only relying on the cement matrix. Utility Model Content

[0003] To address the aforementioned issues, this invention proposes a backing membrane impermeable nonwoven quilted cement-based composite material blanket, which exhibits high tensile and flexural strength and provides long-term impermeability.

[0004] The present invention relates to a backing membrane waterproof nonwoven quilted cement-based composite material blanket, comprising a cement blanket body, wherein the cement blanket body includes:

[0005] The backing waterproof layer has folded edges on both sides; the edges of the folded edges are fixed to the backing waterproof layer by thermal bonding; the inner side of the folded edges is formed into multiple pipe sections by applying adhesive.

[0006] The tension layer is coated on the top surface of the backing impermeable layer; the tension layer is composed of epoxy resin adhesive or butyl rubber adhesive.

[0007] A three-dimensional mesh layer is bonded to the top surface of the tension layer; the three-dimensional mesh is composed of three-dimensionally woven polyester fibers; the three-dimensional mesh layer uses polyester fibers with a diameter of 0.1-0.5 mm, and enhances the interlayer bonding force and tensile strength in the X and Y directions through warp fiber bundles, weft fiber bundles and vertical reinforcing fibers (fibers interlaced in the Z direction);

[0008] A dry concrete mix core layer, wherein the dry concrete mix core layer is filled between three-dimensional mesh layers;

[0009] A cover layer, which is attached to the top surface of the dry concrete mixture core layer;

[0010] The backing waterproof layer, tension layer, three-dimensional grid layer, dry concrete mixture core layer and cover layer are stitched together as one piece by fiber sewing thread;

[0011] When the cement blanket is laid, the folded edge of the cement blanket overlaps the coverage area of ​​the three-dimensional grid layer; and it is fixed to the ground by U-shaped ground nails; non-curing rubber asphalt filler is injected into the cavity of the U-shaped ground nails.

[0012] When installing the cement blanket, first lay the cement blanket in the designated area and overlap the adjacent cement blankets. Determine the U-shaped ground nail driving position, make a hole on the top surface of the cavity at the driving position, and inject non-curing rubber asphalt filler. Then, apply sealant to the overlapping side of the adjacent cement blankets and drive the U-shaped ground nails into the driving position. After waiting for the sealant to fully adhere, water the cement blanket and cure it.

[0013] Furthermore, the backing waterproof layer includes a nonwoven layer made of anti-aging polyester or polypropylene fibers; a waterproof layer is provided on the back of the nonwoven layer, which is a polymer membrane or coated with waterproof asphalt; the polymer membrane and the nonwoven layer are thermally bonded together. The backing waterproof layer uses a nonwoven layer as the load-bearing layer, made of anti-aging polyester or polypropylene fibers, which can adapt well to and conform to various terrains, adhering tightly to the base surface; and a waterproof asphalt coating or thermally bonded polymer membrane is provided on the bottom surface of the nonwoven layer, providing a continuous and seamless waterproof barrier to prevent liquid leakage.

[0014] Furthermore, the polymer membrane is composed of HDPE, PVC or TPO; the thickness of the polymer membrane is 0.2-1.0 mm, and the polymer membrane itself has chemical stability, which can achieve long-term seepage prevention.

[0015] Furthermore, the cover layer includes a non-woven fabric layer, and a mesh-like fiber reinforcement layer is provided on the top surface of the non-woven fabric layer; the fiber reinforcement layer is composed of a mesh structure woven from high-strength fibers; the high-strength fibers are glass fibers or polypropylene; the mesh structure woven from high-strength fibers gives the cover layer tensile strength and impact resistance; when the cover layer and the other layers are sewn together, the overall tensile and impact resistance of the composite material blanket can be improved simultaneously.

[0016] Furthermore, the bottom surface of the folded edge is a downward convex structure or a planar structure; when a downward convex structure is used, the two sides of the backing waterproof layer need to be hot-rolled and shaped.

[0017] Furthermore, the bottom surface of the backing waterproof layer is coated and cured with rubber strips at the fiber sewing thread using a roller adhesive device; the rubber strips can cover the bottom surface of the fiber sewing thread, and prevent the fiber sewing thread from being worn during the laying of the material blanket.

[0018] Furthermore, the top surface of the cover layer is coated with a rubber surface opposite the folded edge; the rubber surface provides flexible tension to the U-shaped ground nails that pass through it, and facilitates adhesive bonding at the overlapping edges.

[0019] Compared with existing technologies, the nonwoven quilted cement-based composite blanket with a backing membrane for seepage prevention in this invention features a backing seepage prevention layer that is integrally bonded to a tension layer and a three-dimensional mesh layer, forming a rigid-flexible composite that both blocks seepage paths and adapts to foundation deformation. The dry concrete mixture core layer crystallizes directionally under the constraint of the three-dimensional mesh layer, preventing shrinkage cracks. The cover layer combines a nonwoven fabric layer and a fiber reinforcement layer, employing a high-strength fiber woven mesh structure to enhance the overall tensile and impact resistance of the blanket. The backing seepage prevention layer provides a continuous and seamless waterproof barrier, preventing liquid leakage. Through the fiber reinforcement of the cover layer, the cement curing of the dry concrete mixture core layer, and the liquid barrier of the backing seepage prevention layer, the compressive strength of the cured cement and the chemical stability of the backing seepage prevention layer are utilized to achieve long-term seepage prevention. Furthermore, by injecting non-cured rubber asphalt filler into the U-shaped ground nail installation positions, in conjunction with the cured dry concrete mixture core layer, the U-shaped ground nails can be completely sealed, preventing leakage. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the cement blanket in Embodiment 1 of this utility model.

[0021] Figure 2 For the present utility model Figure 1 A magnified schematic diagram of the structure at point A in the middle.

[0022] Figure 3 This is a schematic diagram of the installation structure at the overlapping edge of adjacent cement blankets according to this utility model.

[0023] Figure 4 This is a schematic diagram of the installation structure of the backing waterproof layer, tension layer, three-dimensional mesh layer and dry concrete mixture core layer of this utility model.

[0024] Figure 5 For the present utility model Figure 4 A magnified schematic diagram of the structure at point B in the middle.

[0025] Figure 6 This is a schematic diagram of the cover layer structure of this utility model.

[0026] Figure 7This is a schematic diagram of the overall structure of the cement blanket according to another embodiment of the present invention.

[0027] Figure 8 For the present utility model Figure 7 A magnified schematic diagram of the structure at point C.

[0028] Reference numerals: 1. Backing waterproof layer, 2. Folded edge, 3. Adhesive dotting, 4. Tensioned layer, 5. Three-dimensional grid layer, 6. Dry concrete mix core layer, 7. Cover layer, 8. U-shaped ground nail, 9. Non-woven layer, 10. Waterproof layer, 11. Non-woven fabric layer, 12. Fiber reinforcement layer, 13. Rubber ribs, 14. Rubber surface. Detailed Implementation

[0029] Example 1:

[0030] like Figures 1 to 8 The backing membrane waterproof nonwoven quilted cement-based composite blanket shown includes a cement blanket body, which comprises:

[0031] The backing waterproof layer 1 has folded edges 2 on both sides; the edges of the folded edges 2 are fixed to the backing waterproof layer 1 by thermal bonding; the inner side of the folded edges 2 is formed into multiple pipe sections by applying adhesive 3.

[0032] Tension layer 4 is coated on the top surface of backing waterproof layer 1; tension layer 4 is composed of epoxy resin adhesive or butyl rubber adhesive.

[0033] A three-dimensional mesh layer 5 is bonded to the top surface of the tension layer 4; the three-dimensional mesh is composed of three-dimensional weaving of polyester fibers; the three-dimensional mesh layer 5 uses polyester fibers with a diameter of 0.1-0.5mm, and improves the interlayer bonding force and tensile strength in the X and Y directions through warp fiber bundles, weft fiber bundles and vertical reinforcing fibers (fibers interlaced in the Z direction);

[0034] After the backing waterproof layer 1 is processed, it is subjected to a water pressure test. The waterproof level of the backing waterproof layer 1 can reach P8-P12 (no leakage under 0.8-1.2MPa water pressure), which far exceeds the traditional mortar waterproof standard.

[0035] The dry concrete mix core layer 6 is filled between the three-dimensional mesh layers 5. The dry concrete mix core layer 6 includes dry concrete mix and contains cellulose. The cellulose content is 12-20%. The dry concrete mix core layer 6 undergoes a hydration reaction when it comes into contact with water. Due to the addition of 12-20% cellulose in the mix, the composite material blanket can still be shaped on-site within 2 hours. After complete curing, the dry concrete mix core layer 6 has compressive strength and flexural strength.

[0036] Cover layer 7, which is attached to the top surface of dry concrete mixture core layer 6;

[0037] The backing waterproof layer 1, tension layer 4, three-dimensional mesh layer 5, dry concrete mixture core layer 6, and cover layer 7 are stitched together as one piece using fiber sewing thread;

[0038] When the cement blanket is laid, the folded edge 2 of the cement blanket overlaps the coverage area of ​​the three-dimensional grid layer 5; and is fixed to the ground by U-shaped ground nails 8; non-curing rubber asphalt filler is injected into the cavity of the folded edge 2 embedded in the U-shaped ground nails 8.

[0039] When installing the cement blanket, first lay the cement blanket in the designated area and overlap the adjacent cement blankets. Determine the driving position of the U-shaped ground nail 8, make a hole on the top surface of the cavity at the driving position, and inject non-curing rubber asphalt filler. Then, apply sealant to the overlapping side of the adjacent cement blankets and drive the U-shaped ground nail 8 into the driving position. After waiting for the sealant to fully adhere, water the cement blanket and cure it.

[0040] The backing waterproof layer 1 includes a nonwoven layer 9, which is made of anti-aging polyester or polypropylene fibers. A waterproof layer 10 is provided on the back of the nonwoven layer 9, which is a polymer membrane or coated with waterproof asphalt. The polymer membrane and the nonwoven layer 9 are thermally bonded together. The backing waterproof layer 1 uses the nonwoven layer 9 as a load-bearing layer. The nonwoven layer 9, made of anti-aging polyester or polypropylene fibers, can adapt well to and conform to various terrains, adhering tightly to the base surface. A waterproof asphalt coating or thermally bonded polymer membrane is provided on the bottom surface of the nonwoven layer 9, providing a continuous and seamless waterproof barrier to prevent liquid leakage.

[0041] The polymer membrane is made of HDPE, PVC or TPO; the thickness of the polymer membrane is 0.2-1.0 mm, and the polymer membrane itself has chemical stability, which can achieve long-term seepage prevention.

[0042] The cover layer 7 includes a non-woven fabric layer 11, and a mesh-like fiber reinforcement layer 12 is provided on the top surface of the non-woven fabric layer 11. The fiber reinforcement layer 12 is composed of a mesh structure woven from high-strength fibers. The high-strength fibers are glass fibers or polypropylene. The mesh structure woven from high-strength fibers gives the cover layer 7 tensile strength and impact resistance. When the cover layer 7 is sewn together with the other layers, the overall tensile and impact resistance of the composite material blanket can be improved simultaneously.

[0043] The bottom surface of the folded edge 2 is either a downwardly convex structure or a planar structure; such as Figure 7 and Figure 8 As shown, when a downward protruding structure is adopted, the backing impermeable layer 1 needs to be hot-rolled and shaped on both sides.

[0044] like Figure 8 As shown, the bottom surface of the backing waterproof layer 1 is coated and cured with rubber reinforcing strips 13 at the fiber sewing lines using a roller adhesive device; the rubber reinforcing strips 13 can cover the bottom surface of the fiber sewing lines, and prevent the fiber sewing lines from being worn during the laying of the material blanket; the top surface of the cover layer 7 is coated with a rubber surface 14 directly opposite the folded edge 2; the rubber surface 14 flexibly tightens the U-shaped ground nails 8 that pass through, and facilitates the adhesive bonding at the overlapping edges.

[0045] The construction process of the cement blanket is as follows:

[0046] Surface preparation: Clean the base layer of debris to ensure it is flat and free of sharp protrusions;

[0047] Laying and Cutting: Cut the cement blanket as needed. The overlap width between the folded edge 2 of the cement blanket and the three-dimensional grid layer 5 of the adjacent cement blanket should be ≥10cm. Determine the hammering position of the U-shaped ground nail 8. Inject non-curing rubber asphalt filler into the top of the cavity at the hammering position. Then, apply sealant to the surface where the folded edge 2 and the cement blanket are in contact. After the sealant has cured, spray clean water evenly until the dry concrete mixture core layer 6 is saturated. Allow it to cure naturally for 24-48 hours to complete the construction of the cement blanket.

[0048] The above embodiments are merely preferred embodiments of the present utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model are included within the scope of the present utility model.

Claims

1. A backing membrane impervious nonwoven quilted cementitious composite blanket comprising a cementitious blanket body, characterized by: The cement blanket comprises: a backing impermeable layer, both sides of which are provided with a folded edge; the edge of the folded edge is fixed by heat bonding with the backing impermeable layer; the inside of the folded edge is formed into multiple sections of lumen by point gluing; a tensioning layer coated on the top surface of the backing impermeable layer; the tensioning layer is composed of epoxy resin glue or butyl rubber adhesive; a three-dimensional grid layer bonded on the top surface of the tensioning layer; the three-dimensional grid is composed of three-dimensional polyester fiber weaving; a dry concrete mixture core layer filled between the three-dimensional grid layers; a cover layer attached to the top surface of the dry concrete mixture core layer; the backing impermeable layer, the tensioning layer, the three-dimensional grid layer, the dry concrete mixture core layer and the cover layer are sewn together by fiber sewing thread; when the cement blanket is laid, the folded edge of the cement blanket is overlapped to the covered area of the three-dimensional grid layer; and is fixed by U-shaped ground nails; the folded edge is injected with non-solidified rubber asphalt filler in the lumen embedded with the U-shaped ground nails.

2. The backing membrane impervious nonwoven quilted cementitious composite blanket of claim 1, wherein: The backing impermeable layer comprises a non-woven layer made of anti-aging polyester or polypropylene fiber; the back surface of the non-woven layer is provided with an impermeable layer, which is a high polymer film or a waterproof asphalt coating layer; the high polymer film and the non-woven layer are heat-pressed and bonded together.

3. The backing membrane impervious nonwoven quilted cementitious composite blanket of claim 2, wherein: The high polymer film is composed of HDPE, PVC or TPO; the thickness of the high polymer film is 0.2-1.0mm.

4. The backing membrane impervious nonwoven quilted cement composite blanket according to claim 1, characterized in that: The cover layer comprises a non-woven fabric layer, the top surface of which is provided with a reticular fiber reinforced layer; the fiber reinforced layer is composed of high-strength fiber woven into a reticular structure; the high-strength fiber is glass fiber or polypropylene.

5. The backing membrane impervious nonwoven quilted cementitious composite blanket of claim 1, wherein: The bottom surface of the folded edge is a downward convex structure or a flat structure.

6. The backing membrane impervious nonwoven quilted cement composite blanket of claim 1, wherein: The bottom surface of the backing impermeable layer is coated with rubber ribs at the fiber sewing thread by a rubber coating device.

7. The backing membrane impervious nonwoven quilted cementitious composite blanket of claim 1, wherein: The top surface of the cover layer is coated with a rubber surface opposite to the folded edge.

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