KR101598073B1 - View Stone Panel using Recycling Material - Google Patents

Abstract

The present invention relates to an environment-friendly artificial stone panel using reusable materials, which comprises: 28 to 32 wt% of blast furnace slag; 34 to 38 wt% silicomanganese slag; 2 to 5 wt% of cement; 2 to 5 wt% of metakaolin; 8 to 12 wt% of calcium hydroxide; 1 to 2 wt% of glass fiber; 2 to 3 wt% of polypropylene fiber; 1 to 2 wt% of high-strength polyvinyl acetate (PVA) fiber; 0.4 to 1.0 wt% of a water-reducing agent; 3 to 5 wt% of silicate soda; 0.4 to 1.0 wt% of pump aid; 1 to 2 wt% of mordine; 0.5 to 1.0 wt% of iron oxide pigment; and 2 to 3 wt% of an admixture. The artificial stone panel in the present invention prevents problems related to environment and deficiency of aggregates, and has an effect of effectively managing resources and providing an environment-friendly artificial stone panel using reusable materials while embodying high flexural strength and compression strength.

Description

{View Stone Panel using Recycling Material}

The present invention relates to an environmentally-friendly lightweight stone panel using recycled materials, and more particularly, to an environmentally-friendly lightweight stone panel using recycled materials capable of preventing environmental pollution and efficiently managing resources by replacing cement and sand with recycled materials.

Due to the recent interest in landscaping, there are a growing number of places to install landscaping. Therefore, it is a tendency to introduce indoor landscaping to resting spaces of employees in enterprises as well as play facilities, theme parks, or amusement parks using water, or to install landscape facilities in public offices, exhibition halls, hotels, airports and apartment complexes.

Such landscaping facilities include flower beds, gardens, artificial waterfalls, and artificial walls. In addition to flowers and trees, rocks are often used in these landscaping facilities. In recent years, landscape stones (also called artificial rocks or artificial rocks) have been produced and used for landscaping.

Such synthetic artificial stone is generally made by mixing cement and sand as main materials and various other components.

However, it is known that cement produces about 870 kg of CO2 gas to produce one tonne. This massive release of CO2 is one of the causes of global warming and is known to affect the earth's abnormal temperature and weather conditions.

Although the need for natural resource management is increasing due to the uncertainty of resource supply and demand due to the shortage of aggregates worldwide due to continuous collection of sand (silica sand), there is an increasing demand for natural resource management. In the case of artificial waterfall and artificial stone, There has been no suggestion of a suitable substitute for sand in the production of flooring and landscape sculptures.

Application No. 10-2004-0002939 (registration number: 10-0607856, entitled " Method for manufacturing artificial water of artificial waterfall and its structure)

Disclosure of the Invention The present invention has been conceived in order to solve the problems of the prior art described above, and it is an object of the present invention to replace most of the cement with blast furnace slag and replace the entire sand with silicon manganese slag to enable environmental protection and efficient resource management, And to provide an environmentally friendly lightweight stone panel using a recycled material capable of realizing a compressive strength.

In order to solve the above problems, the eco-friendly light stone panel using the recycled material according to the present invention comprises 28-32 wt% blast furnace slag, 34-38 wt% silicon manganese slag, 6-8 wt% cement, 3-5 wt% % By weight of calcium carbonate, 2 to 3% by weight of polypropylene fibers, 1 to 2% by weight of high strength PVA fibers, 0.5 to 0.8% by weight of water reducing agent, 3 to 5% by weight of sodium silicate, 0.5 to 0.8% by weight of a pump aid, 1 to 2% by weight of a molybdenum, 0.8 to 1.0% by weight of an iron oxide pigment, and 2 to 3% by weight of an admixture.

More specifically, 30 weight% of the blast furnace slag, 36 weight% of silicon manganese slag, 6 weight% of cement, 4 weight% of meta kaolin, 7 weight% of slaked lime, 2 3% by weight of polypropylene fiber, 2% by weight of high strength PVA fiber, 0.6% by weight of water reducing agent, 4% by weight of sodium silicate, 0.6% by weight of pump aid and 2% by weight of molybdenum iron oxide, 0.8% by weight, and the admixture is 2% by weight.

The eco-friendly light stone panel using the recycled material of the present invention having the above configuration recycles waste blast furnace slag to replace most of the cement, thereby reducing a large amount of CO2 generated in the production of cement, There is an advantage in that the cost can be reduced and the blast furnace slag can be discarded and pollution of the environment can be prevented.

In addition, by recycling the discarded silicon manganese slag to replace the entire amount of sand, it is possible to prevent the problem of environmental pollution and also to prevent the aggregate shortage phenomenon by preventing the collection of sand, and to efficiently manage resources.

In particular, by using blast furnace slag and silicon manganese slag, which are recycled materials, which are much cheaper in price as a substitute for cement and sand, there is an advantage that manufacturing costs for manufacturing environmentally friendly light stone can be greatly reduced.

FIGS. 1A to 1B are test results of an environmentally friendly light stone panel using a recycled material according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of an environmentally-friendly lightweight stone panel using a recycled material according to the present invention will be described in detail with reference to the accompanying drawings.

FIGS. 1A and 1B are test reports of an environmentally friendly lightweight stone panel using a recycled material according to the present invention.

The eco-friendly light stone panel using the recycled material according to the present invention comprises 28 to 32% by weight of blast furnace slag, 34 to 38% by weight of silicon manganese slag (called NS-Ball), 6 to 8% by weight of cement, 5 to 8 weight percent of calcium carbonate, 1 to 2 weight percent of glass fiber, 2 to 3 weight percent of polypropylene fiber, 1 to 2 weight percent of high strength PVA fiber, 0.5 to 0.8 weight percent of water reducing agent, 0.5 to 0.8% by weight of a pump aid, 1 to 2% by weight of a motoride, 0.8 to 1.0% by weight of an iron oxide pigment, and 2 to 3% by weight of an admixture.

The blast furnace slag is an industrial by-product produced when pig iron is manufactured by mixing iron ore, limestone and coke in a blast furnace of a steel mill. In the present invention, most of cement is replaced with blast furnace slag, thereby preventing environmental pollution, Thereby minimizing depletion and lowering the manufacturing cost. Cement has problems such as cracking due to initial strength and whitening caused by water and chemical reaction. When using blast furnace slag instead of cement as in the present invention, it is possible to prevent temperature thermal shock by hydration reaction, Excellent long-term strength and excellent resistance to water-resistance and chemical resistance.

The silicon manganese slag is the final by-product of the ferroalloy manufacturing process. When the production of ferroalloy is increased, the amount of silicon manganese slag produced as a by-product increases. Until now, most of silicon manganese slag has been treated by landfill, which causes environmental problems such as scattered dust and leachate. In the present invention, by using such silicon manganese slag as a substitute for the whole amount of sand, environmental pollution can be prevented and natural resources can be saved.

In the present invention, metakaolin is added to improve initial strength and compressive strength in order to prevent such a phenomenon because replacement of ordinary portland cement with fine blast furnace slag powder is excellent in long-term strength but weak in initial curing process. The meta-kaolin fills the voids between the particles to make the hardened body have a dense structure. By transferring the calcium hydroxide produced in the hydration reaction to the calcium silicate hydrate having more excellent properties in strength development, the adhesion force of the particles is increased, As the construction of reinforced concrete structures increases, the long - term exposed reinforced concrete is more resistant to corrosion.

The slaked lime is a white powder obtained by reacting calcium oxide (CaO) with water or steam and classifying it, and has a strong alkaline property. These slaked lime breaks down the impermeable layer of the slag and serves to exhibit the latent hydraulic properties of the slag.

More specifically, the blast furnace slag and the silicon manganese slag are substances having potential hydraulic properties that can not initiate a self-triggered hydration reaction only by reacting with water, that is, blast furnace slag and silicon manganese slag react with water , A dense impermeable gel thin film layer is formed on the surface of the particle, so that the penetration of water into the particle is obstructed and no further reaction occurs.

However, when the slaked lime is added as in the present invention, the impermeable gel thin film layer of the slag is broken due to the strong alkalinity of the slaked lime, so that the gel of the islands structure is changed into Al 2 O 3 (aluminum oxide) from the slag. The eluted Al2O3 ion reacts with the calcium hydroxide produced by hydration reaction of hydrated lime to produce the CSH gel, which causes the blast furnace slag fine powder to exhibit the potential hydraulicity, so that the initial strength is reduced but the long term strength is increased.

The glass fiber is not dissolved in the slaked lime having strong alkaline properties and is used as a reinforcing material for increasing the bending strength of the light stone panel. More specifically, the strongly alkaline glass fiber (AR-GLASS) is a silica fiber having a SiO ₂ (silicon oxide) content of 95% or more. It has higher heat resistance than conventional glass fibers and does not cause itching on the skin. In addition, it is a fiber which is high in ZrO ₂ content and does not dissolve in water and has a high resistance against alkali. It is used as a reinforcing material to increase bending strength as glass fiber which has remarkably improved alkali resistance.

The polypropylene fiber suppresses the generation of cracks and cracks due to heat of explosion, plastic shrinkage, drying shrinkage and the like generated in the curing process of the mixture.

The high-strength PVA fiber has excellent adhesion performance and high alkali resistance, thereby increasing tensile strength and flexural strength (ductility, softness).

The water reducing agent is an acrylic polymer which is a polycarboxylic acid-based high-performance water reducing agent, and serves to solve the slump loss problem.

Said silicate fills voids in the mixture to form a dense structure to prevent waterproofing and cracks. Sodium silicate (sodium silicate) is the most widely used inorganic compound among water-soluble silicates. Cement produced by mixing sodium silicate is used for acid-resistant structures, refractories and binders for insulating materials. In addition, when liquid sodium silicate is used for cement mixing, it has the advantage of imparting acid resistance, heat resistance and water resistance to cement. Also, cement mixed with liquid sodium silicate is easy and economical to work and adhere well to any surface, It plays a role of preventing the waterproofing performance and crack (crack) by making an organization.

The pump aid is composed of glycerine, triethanol-amine and water, which is a lubricant having a long chain organic molecular structure. The glycerin dissolved in water lubricates the glass fiber, the blast furnace slag, Silicon manganese slag and slaked lime are prevented from aggregating. In addition, triethanolamine is a surfactant that lowers the surface tension to increase the viscosity of the mixture by increasing the miscibility between water and blast furnace slag and silicon manganese slag.

The molybdenum and admixture improves the strength and adhesion of the mortar and improves the adhesion of the mixture according to the effects such as the rapid absorption of the concrete as a base by applying it to the concrete base and the initial strength Thereby preventing cracks on the surface.

The green environment-friendly stone panel using the recycled material according to the present invention comprises 30% by weight of blast furnace slag, 36% by weight of silicon manganese slag (0.2 to 0.6 mm in weight), 6% by weight of cement, 4% by weight of meta kaolin, 7 wt% of slaked lime, 2 wt% of glass fiber, 3 wt% of polypropylene fiber, 2 wt% of high strength PVA fiber, 0.6 wt% of water reducing agent, 4 wt% of sodium silicate, 0.6 wt% of pump aid, 0.8% by weight of pigment, and 2% by weight of an admixture were mixed to prepare specimens (Examples according to the present invention).

A specimen was prepared by mixing 50% by weight of blast furnace slag, 30% by weight of sand, 15% by weight of slaked lime, 2.5% by weight of glass fiber, 1% by weight of water reducing agent, 1% by weight of pump aid and 0.5% by weight of iron oxide pigment .

The bending strength and the compressive strength of the specimens of the examples and comparative examples were measured.

As can be seen from the following Tables 2 and 3, the specimens according to the present invention had a flexural strength of 24.4 MPa (bending strength 3-1: 23.4 MPa, bending strength 3-2: 24.6 (Compressive strength 3-1: 49.2 MPa, compressive strength 3-2: 46.2 MPa, compressive strength 3-3: 46.5 MPa, and flexural strength 3-3: 25.3 MPa / 24.3 MPa) MPa / 47.3 MPa), and the specimen of the comparative example according to the prior art had a flexural strength of 14.8 MPa (average value). As a result, it can be seen that the flexural strength and the compressive strength of the test piece according to the present invention are superior to the flexural strength and the compressive strength of the comparative test piece according to the prior art. According to the landscape design standard, the bending strength is required to be 10.00 MPa or more and the compressive strength is 40.00 MPa, and the present invention meets this demand.

blast furnace
Slag sand Lime lime Water reducing agent Pump
Aide Glass
fiber Pigment Remarks Comparative Example 50% 30% 15% One% One% 2.5% 0.5%

[Comparative Example Blending Ratio (Patent Registration No.: No. 10-0805912)]

Flexural strength (MPa) Absorption Rate (%) Remarks Test value Average Test value Average
Comparative Example 13.9
15.2 10.0
9.0 16.2 9.0 15.4 8.0

[Comparative Example Test Report]

※ Result of the Korea Institute of Construction & Living Environment Test published in the patent publication No. 10-0805912

In the present invention, two specimens of the following test examples were manufactured, and the flexural strength and the compressive strength of the specimens of the present invention were compared with those of the comparative specimens of the prior art.

The specimen of the first test example of the two test specimens of the test specimen was composed of 40 wt% of blast furnace slag, 30 wt% of sand, 2.2 wt% of cement, 8 wt% of meta kaolin, 15 wt% of slaked lime, 2 wt% of glass fiber, 0.4% by weight of a water reducing agent and 0.4% by weight of a pump aid. In the second test example, 30% by weight of blast furnace slag, 40% by weight of silicon manganese slag, 2.2% by weight of cement, 8% by weight of meta kaolin, 15% 2 wt%, polypropylene 2 wt%, water reducing agent 0.4 wt%, and pump aid 0.4 wt%. The blast furnace slag is a blast furnace slag having a specific surface area of 6,000 to 8,000 (cm 2 / g), and the silicon manganese slag has a fine powder specific surface area of 6,000 to 8,000 (cm 2 / g) and a fine powder of 0.2 to 0.6 mm.

The measured values are shown in [Table 3] below. The specimens of the test specimen have a flexural strength of 13.1 MPa and a compressive strength of 26.3 MPa. As a result, it can be seen that the flexural strength and the compressive strength of the test piece according to the present invention are superior to the flexural strength and compressive strength of the test piece of the test example.

Test Example


Example Remarks Test value Average Test value Average
Flexural strength (MPa) 13.2
13.1 23.4
24.4 11.9 24.6 14.3 25.3
Compressive strength (MPa) 27.7
26.3 49.2
47.3 22.4 46.2 28.7 46.5

[Comparison of test results with test examples and examples]

blast furnace
Slag
sand
cement Meta
kaoline
Lime lime Glass
fiber Polypropylene
Water reducing agent Pump
Aide Remarks First test
40.0%
30.0%
2.2%
8.0%
15.0%
2.0%
2.0%
0.4%
0.4%

[Test Example Blending Ratio]

※ Difference from the present invention: NS - Ball , High strength VPA fiber, Sodium silicate , Moldain , Iron oxide pigment, admixture

blast furnace
Slag
NS-
Ball
cement Meta
kaoline
Lime lime
Glass
fiber Polypropylene High strength
PVA
Water reducing agent
Silicic acid
soda Pumping
Aide
Moldain Iron oxide
Pigment
Admixture
Remarks apply
Technology 28 ~
32 34 ~
38
6 to 8
3 to 5
6 to 8
1-2
2 to 3
1-2 0.5 ~
0.8
3 to 5 0.5 ~
0.8
1-2 0.5 ~
1.0
2 to 3

[Embodiment mixing ratio]

When the composition ratio of blast furnace slag is higher than 28 ~ 32 wt%, the viscosity of the blast furnace slag is decreased, but the flexural strength after curing is decreased due to the lack of aggregate amount and the increase of water content. When the silicon manganese slag is 34 ~ 38 wt%, the viscosity decreases and the flexural strength decreases after curing. When the cement content is more than 6 ~ 8 wt%, it is difficult to mix the mixture, and the mixing strength is not improved and the compressive strength is decreased. When the content of the calcium hydroxide exceeds 6 to 8% by weight, the bending strength and compressive strength after curing are reduced by increasing the amount of water when the mixture is blended. In addition, when 1 to 2% by weight of glass fiber, 2 to 3% by weight of polypropylene fiber, and 1 to 2% by weight of high-strength PVA fiber can not play a role in comparison with a large amount thereof, This becomes difficult. Also, when the water reducing agent is used in an amount of 0.5 to 0.8% by weight, the flow of the mixture is severe and production is impossible. The viscosity is high when 3 to 5% by weight of sodium silicate, 0.5 to 0.8% by weight of pump aid, 1 to 2% by weight of iron oxide, 0.8 to 1.0% by weight of iron oxide pigment and 2 to 3% by weight of an admixture are present.

The eco-friendly light stone panel using the recycled material according to the present invention can be applied to a landscape stone such as an artificial waterfall and an artificial rock, a building interior material, an exterior material, and various scenery sculptures.

Claims (2)

28 to 32 wt% of blast furnace slag, 34 to 38 wt% of silicon manganese slag, 6 to 8 wt% of cement, 3 to 5 wt% of meta kaolin, 6 to 8 wt% of slaked lime, 1 to 2 wt% of glass fiber, 2 to 3 wt% PVA fiber 1 to 2 wt%, water reducing agent 0.5 to 0.8 wt%, sodium silicate 3 to 5 wt%, pump aid 0.5 to 0.8 wt%, moldin 1 to 2 wt%, iron oxide pigment 0.8 to 1.0 By weight, and 2 to 3% by weight of an admixture are mixed.
The method according to claim 1,
The blast furnace slag is 36 weight%, the cement is 6 weight%, the meta kaolin is 4 weight%, the slag is 7 weight%, the glass fiber is 2 weight%, the polypropylene 3% by weight of fiber, 2% by weight of PVA fiber, 0.6% by weight of water reducing agent, 4% by weight of sodium silicate, 0.6% by weight of pumpide, 2% by weight of molybdenum, 0.8% By weight based on the weight of the recycled material.

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