KR20190004737A - Building materials including polyolefin mesh - Google Patents

Building materials including polyolefin mesh Download PDF

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Publication number
KR20190004737A
KR20190004737A KR1020187034554A KR20187034554A KR20190004737A KR 20190004737 A KR20190004737 A KR 20190004737A KR 1020187034554 A KR1020187034554 A KR 1020187034554A KR 20187034554 A KR20187034554 A KR 20187034554A KR 20190004737 A KR20190004737 A KR 20190004737A
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KR
South Korea
Prior art keywords
mesh
polyolefin
plaster
building material
range
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KR1020187034554A
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Korean (ko)
Inventor
위싸니 차로엔피니카른
윌라사 비치트-바다칸
Original Assignee
에스씨지 케미컬스 컴퍼니, 리미티드.
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Application filed by 에스씨지 케미컬스 컴퍼니, 리미티드. filed Critical 에스씨지 케미컬스 컴퍼니, 리미티드.
Publication of KR20190004737A publication Critical patent/KR20190004737A/en

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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
    • E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
    • E04C2/04—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of concrete or other stone-like material; of asbestos cement; of cement and other mineral fibres
    • E04C2/043—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of concrete or other stone-like material; of asbestos cement; of cement and other mineral fibres of plaster
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
    • E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
    • E04C2/04—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of concrete or other stone-like material; of asbestos cement; of cement and other mineral fibres
    • E04C2/044—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of concrete or other stone-like material; of asbestos cement; of cement and other mineral fibres of concrete
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
    • E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
    • E04C2/04—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of concrete or other stone-like material; of asbestos cement; of cement and other mineral fibres
    • E04C2/06—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of concrete or other stone-like material; of asbestos cement; of cement and other mineral fibres reinforced
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/07—Reinforcing elements of material other than metal, e.g. of glass, of plastics, or not exclusively made of metal

Abstract

The present invention relates to a building material comprising a polyolefin mesh, wherein the polyolefin mesh is disposed within the building material and / or on at least one surface thereof. Building materials have the advantages of improved strength, lighter weight, easier installation and transportation, lower cost of materials and installation costs.

Description

Building materials including polyolefin mesh

The present invention relates to a building material comprising a polyolefin mesh.

In the construction industry, the development of improved cementitious building materials and their manufacturing methods continues. There are many studies on improvement of bending strength, impact strength, good appearance and prevention of early cracking.

EP2649252A2 discloses a reinforced cementitious board system comprising a core layer made of a cementitious composition and a coated glass fiber mesh or scrim on the opposite surface of the cement core to be inserted or slightly inserted on the cementitious core at the opposed flat surfaces of the core layer .

CN204126115U discloses a steel wire mesh cement wall board comprising a board body, a wire mesh inserted into the board body, and a glass fiber mesh layer bonded onto the upper surface of the board body.

Glass fiber has a disadvantage of insufficient resistance to alkali attack from cement, gypsum and plaster components. To protect the glass fibers from decomposition under these highly alkaline conditions, a polymer coating must be applied to the glass fibers. The integrity of the coating on glass fiber is critical to the success of building materials. In addition, the coating rapidly breaks down into heat normally generated during curing of cement, gypsum and plaster. The glass fiber mesh is a woven material lacking the shape stability of the extruded mesh and the ability to recover to its original shape after application of the shear force.

The main disadvantage of steel mesh is that it is sensitive to moisture which causes rust and degrades the physical and mechanical properties of the steel wire mesh. In addition, the steel mesh has a high weight per area, which increases transportation costs and is difficult to carry. Also, since steel is stiff, it is difficult to cast into an existing freestyle shape and tends to return to its original shape.

Also, glass fiber mesh and steel mesh are difficult to install, and both material cost and installation cost are high. Also, they are not very safe because they break into very small, sharp pieces that can be harmful.

It is therefore an object of the present invention to provide a building material comprising a polyolefin mesh which can increase the resistance to cracking of a brittle matrix and which has impact resistance and high flexural strength. In addition, polyolefin meshes have many advantages over steel meshes and glass fiber meshes, for example, easy and quick building material installation, light weight, easy to carry, safety, low material and installation costs.

The present invention relates to a building material comprising a polyolefin mesh, wherein the polyolefin mesh is disposed within the building material and / or on at least one surface thereof.

Are included in the scope of the present invention.

Figure 1 (a) shows the cracks after accelerated cracking test of the meshless plaster.
Fig. 1 (b) shows cracking after accelerated cracking test of plaster with steel mesh.
Figure 1 (c) shows the cracks after accelerated cracking test of a plaster with a PP mesh of 2 mm mesh size.
Fig. 2 (a) shows the appearance after the Schmidt Hammer test of the meshless plaster.
Fig. 2 (b) shows the appearance of a plaster having a PP mesh of 2 mm mesh size after a Schmidt hammer test.
Fig. 3 shows the flexural strength of a plaster supported with a meshless plaster and a PP mesh, a glass fiber mesh and a steel mesh.

The following detailed description sets forth the details of the present invention.

The present invention relates to a building material comprising a polyolefin mesh, wherein the polyolefin mesh is disposed within the building material and / or on at least one surface thereof.

The term " polyolefin " refers to any polymerized olefin that may be linear, branched, cyclic, aliphatic, aromatic, substituted or unsubstituted.

The term 'building material' means all materials used for construction purposes, including natural sources, synthetic materials, artificial products and architectural products.

In one embodiment, the polyolefin mesh preferably comprises polyolefin fibers and mesh-gaps extending in two directions.

In other embodiments, the mesh-gaps may be of various shapes such as square, rectangular, trapezoidal, triangular or circular, preferably square mesh-gaps.

In a preferred embodiment, the polyolefin mesh has a mesh size in the range of 0.2-2 cm, more preferably 0.5-2 cm. A mesh size of less than 0.2 cm may cause delamination between the mesh and the building material. Mesh sizes greater than 2 cm can cause lower reinforcement for building materials because the distance between the polyolefin fibers is too large to adequately reinforce the building material.

In one embodiment, the thickness of the polyolefin fibers is preferably in the range of 0.2-0.7 mm, preferably 0.2-0.3 mm. A thickness greater than 0.7 mm may cause delamination between the mesh and the building material. A thickness of less than 0.2 mm causes the polyolefin fibers to tear easily.

In a further embodiment, the polyolefin mesh comprises a mesh knot. The thickness of the mesh knot is 0.7-1.2 mm. The mesh knot acts as a fixing device for fixing the position of the mesh and reinforcing the building material when installed inside the building material.

In one embodiment, the polyolefin mesh is made from a polyolefin.

In a preferred embodiment, the polyolefin has a melt flow index (MI) in the range of 2-3 g / 10 min. According to the present invention, the melt flow index is determined according to ASTM D 1238.

In a further preferred embodiment, the polyolefin has a flexural modulus (according to ASTM D 790) in the range of 10,000 to 20,000 kg / cm 2 , more preferably in the range of 13,000 to 15,500 kg / cm 2 .

A preferred range of melt flow index and / or flexural modulus yields a polyolefin suitable for forming a mesh having an appropriate size and high strength.

In one embodiment, the polyolefin is preferably selected from polyethylene (PE), polypropylene (PP) or a mixture thereof, preferably polypropylene.

In one embodiment, the polyolefin may contain a wide range of additives. For example, the polyolefin may include processing aids, antioxidants, antiozonants, ultraviolet light stabilizers, heat stabilizers, biocides, antimicrobials, viscosity modifiers, reinforcing additives, strength enhancers, colorants, pigments and the like.

In one embodiment, the building material is preferably selected from the group consisting of Portland cement based plaster or concrete, Portland cement based board, gypsum based plaster or gypsum board, any form of masonry block and bonding compound, and solid and wrinkled plastic boards and corresponding joints But are not limited to, compounds.

The present invention relates to a Portland cement or gypsum board comprising a polyolefin mesh in one preferred embodiment, wherein the polyolefin mesh is disposed within and / or on at least one surface of the Portland cement or gypsum board.

The present invention relates to a plaster wall comprising a polyolefin mesh in one preferred embodiment, wherein the polyolefin mesh is disposed within the plaster wall and / or on at least one surface thereof.

In one embodiment, the plaster wall comprising the polyolefin mesh is preferably (1) plastered on the wall, (2) on a wet plaster, regardless of whether it is a Portland cement or gypsum board or a masonry wall, (PP mesh) and / or a polypropylene mesh (PP mesh) fixed directly to the substrate. In a preferred installation, the filament orientation of the PP mesh is aligned with the crack direction and / or latent crack formation direction, (3) plastering on a PP mesh, (4) curing under ambient conditions and drying.

The present invention will be explained in more detail by the following examples. However, these examples should not be construed as limiting the scope of the present invention.

Preparation of Plaster Samples

The meshless plaster samples and the various mesh type plaster samples shown in Table 1 and Figures 1 to 3 are prepared as follows.

1. Part 2 Sand of the skin is mixed with one part skin of Masonry cement.

The sand is a sand size no. 1 at a ratio of 1: 1. 50 and 100 were mixed.

2. Place the first mixture in a first plexiglass mold (30 cm wide x 30 cm long) and make the mixture flush with the first plexiglass mold to the same height.

3. For plaster samples with mesh, place the mesh on the plaster before curing and gently unfold the surface so that the mesh is inserted into the wet plaster placed in step 2.

4. Place a second plexiglass mold on the first plexiglass mold.

5. Place the mixture from step 1 into a second plexiglass mold, flatten the mixture, smooth it, and level it with the second plexiglass mold.

6. Cure the plaster and dry it under ambient conditions for 7 days.

The polypropylene mesh used in the present invention (PP mesh) was made of polypropylene having a melt flow index (ASTM D1238, 230 ℃, 2.16kg ) 2.4g / 10 minutes and flexural modulus (ASTM D790) 14,250kg / cm 2 . The PP mesh was prepared by extruding the PP through a die at a temperature ranging from 230 < 0 > C to 250 < 0 > C to form a mesh. The mesh is then stretched in both directions (machine direction (MD) and transverse direction (TD)) to obtain the mesh size in the required direction.

The sample of the present invention is a plaster supported by a PP mesh having a square mesh-gap and a mesh size of 2 mm (PP 2 mm), 6 mm (PP 6 mm) and 20 mm (PP 20 mm).

A comparable sample is a plaster supported by a glass mesh mesh with a square mesh-gap and mesh size of 0.5 cm and supported by a steel mesh with a square mesh-gap and mesh size of 0.5 cm.

Example 1:

Accelerated crack test

The samples in Table 1 are prepared according to steps 1 to 5 as described above. Then, when the plaster sample is cured, the drying process is accelerated using a fan blowing across the exposed upper surface of the plaster sample for 3 days. This will accelerate the development of drying shrinkage of the plaster samples. Crack width was measured using a crack comparator.

Table 1 shows that the crack width of the plaster samples (samples 3-5) supported by the PP mesh is smaller than the meshless plaster sample (sample 1) and the steel mesh plaster sample (sample 2).

1 (a), 1 (b) and 1 (c) show the appearance of a meshless plaster sample (sample 1) and a steel mesh plaster sample with a cracked surface, while the plaster sample with a PP mesh size of 2 mm Appearance indicates that the crack is not severe.

Crack widths of the plaster samples without mesh and the plaster samples with various mesh types Sample Mesh type Mesh size (mm) Mesh diameter (mm) Crack width (mm) Average at least maximum One none - - 0.23 0.18 0.29 2 Steel mesh 15 0.5 0.28 0.23 0.34 3 PP mesh 20 0.3 0.21 0.16 0.26 4 PP mesh 6 0.2 0.20 0.15 0.25 5 PP mesh 2 0.27 0.16 0.16 0.16

Example 2:

Impact resistance test (Schmidt hammer test method)

Samples of Table 2 prepared according to steps 1 to 6 as described above are tested using the Schmidt Hammer test method according to ASTM C 805.

Table 2 shows the rebound times of the Schmidt Hammer test method. The higher the rebound number, the stronger the impact of the plaster sample. The plaster samples with PP mesh 20 mm (sample 3) and 2 mm (sample 5) have greater impact resistance than the PP meshless plaster (sample 1).

2 (a) and 2 (b) show the appearance after the Schmidt hammer test. The meshless plaster (Sample 1) is dispersed after the test but the plaster with 2 mm of PP mesh (Sample 5) still retains the shape of the plaster.

Rebound number of plaster samples with mesh-free and PP mesh Sample Mesh type Mesh size (mm) Mesh diameter (mm) Rebounds One none - - <10 3 PP mesh 20 0.3 10-16 5 PP mesh 2 0.27 14-16

Example 3:

Flexural strength test

A plaster sample as in Fig. 3 is prepared as described above. The sample is cut to a size of 15 cm wide and 30 cm long using a bladed power saw to test the flexural strength according to BS EN 196 at a support spacing of 100 mm and a load rate of 100 N / sec. Flexural strength is measured from the maximum load at which micro-cracks occur. The flexural strength shown in Fig. 3 is an average value obtained by testing 3 to 5 test samples for each plaster sample.

Fig. 3 shows that the average flexural strength of the plaster supported by the PP mesh is higher than that of the meshless plaster, the glass fiber mesh plaster and the steel mesh plaster.

Claims (14)

A building material comprising a polyolefin mesh, wherein the polyolefin mesh is disposed within the building material and / or on at least one surface thereof. The method according to claim 1,
The polyolefin mesh is a building material comprising polyolefin fibers and mesh-gaps extending in two directions. 3. The method according to claim 1 or 2,
The mesh-gap geometry is a square, rectangular, trapezoidal, triangular or circular construction material. 4. The method according to any one of claims 1 to 3,
The polyolefin mesh has a mesh size in the range of 0.2-2 cm, preferably 0.5-2 cm. 5. The method according to any one of claims 1 to 4,
The polyolefin fibers have a thickness in the range of 0.2-0.7 mm, preferably 0.2-0.3 mm. 6. The method according to any one of claims 1 to 5,
The polyolefin mesh further comprises a mesh knot having a thickness in the range of 0.7-1.2 mm. 7. The method according to any one of claims 1 to 6,
The polyolefin mesh is made of a polyolefin having a melt flow index in the range of 2-3 g / 10 min. 8. The method according to any one of claims 1 to 7,
The polyolefin mesh is made of a polyolefin having a flexural modulus ranging from 10,000 to 20,000 kg / cm 2 , preferably from 13,000 to 15,500 kg / cm 2 . 9. The method according to any one of claims 1 to 8,
The polyolefin is polyethylene, polypropylene or a mixture thereof, preferably polypropylene. 10. The method according to any one of claims 1 to 9,
Polyolefin mesh is a building material made of polyolefin and additives. 11. The method according to any one of claims 1 to 10,
Additives are building materials which are processing aids, antioxidants, antiozonants, ultraviolet light stabilizers, heat stabilizers, biocides, antimicrobials, viscosity modifiers, reinforcing additives, strength enhancers, colorants, pigments or mixtures thereof. 12. The method according to any one of claims 1 to 11,
Building materials are Portland cement-based plaster or concrete, Portland cement-based board, gypsum-based plaster or plasterboard. 12. A plaster wall comprising a polyolefin mesh according to any one of claims 2 to 11, wherein the polyolefin mesh is arranged on the plaster wall and / or on at least one surface thereof. 12. A gypsum board comprising a polyolefin mesh according to any one of claims 2 to 11, wherein the polyolefin mesh is arranged on a gypsum board and / or on at least one surface thereof.
KR1020187034554A 2016-05-10 2017-05-09 Building materials including polyolefin mesh KR20190004737A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EPEP16168866 2016-05-10
EP16168866 2016-05-10
PCT/TH2017/000036 WO2017196267A1 (en) 2016-05-10 2017-05-09 Building material comprising a polyolefin mesh

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KR20190004737A true KR20190004737A (en) 2019-01-14

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AU (1) AU2017262858A1 (en)
WO (1) WO2017196267A1 (en)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2211984C (en) * 1997-09-12 2002-11-05 Marc-Andre Mathieu Cementitious panel with reinforced edges
US7914884B2 (en) * 2004-02-25 2011-03-29 Milliken & Company Fabric reinforced cement
US20120148806A1 (en) * 2010-12-10 2012-06-14 United States Gypsum Company Fiberglass mesh scrim reinforced cementitious board system
CN204126115U (en) 2014-04-01 2015-01-28 新疆德坤建材有限责任公司 Ferrocement wallboard

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AU2017262858A1 (en) 2018-11-22

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