KR101106133B1 - A composite of green antimicrobial board used industrial waste and the method for production - Google Patents

Abstract

The present invention is 32.5% by weight of blast furnace slag powder, 6.8% by weight of lime, 1.7% by weight of gypsum, 35.8% by weight of silica sand with a diameter of 0.5 mm or less, 0.8% by weight of polypropylene fiber of 30 to 60mm in diameter, 0.8% by weight of inorganic pigment, mugwort It relates to an eco-friendly antimicrobial board composition using industrial waste, which is composed of 0.4% by weight of powder, 0.4% by weight of organic antimicrobial agent, and 20.8% by weight of water.

Antibacterial board. Antibacterial board composition. Industrial waste. Eco-friendly antibacterial board.

Description

Eco-friendly antimicrobial board composition using industrial waste and its manufacturing method {A composite of green antimicrobial board used industrial waste and the method for production}

The present invention relates to an environmentally friendly antimicrobial board composition using industrial waste and a method of manufacturing the same.

According to the 2006 WHO report, the world's total death toll in 2005 was approximately 52 million, with more than 17 million deaths due to microbial infections. In addition, more than 30 new infections such as AIDS and Ebola virus have occurred in the past 25 years, and urgent countermeasures are urgently needed.Severe Acute Respiratory Syndrome (SARS), which is a major problem worldwide in Southeast Asia these days, is also a problem. Known to be spread by microorganisms, the application of antimicrobial materials in human living environment, especially in residential environment, has emerged as a major concern.

However, recent buildings are designed and constructed with excellent airtightness due to the demand for heating efficiency, noise prevention, etc., so that the temperature and humidity of the room become very good conditions for the growth and growth of microorganisms.

In particular, the current residential environment, which is increasing in frequency of living in the modern society due to the change in the lifestyle of the modern society, causes the decay of the material, the generation of odor, and the spores of mold due to coexistence of the living environment of human being with the living environment such as mold, bacteria, and insects. It is a situation that greatly threatens the health and life of residents such as children's asthma.

Korean Patent Laid-Open Publication No. 10-2005-104477 discloses a gypsum composition comprising 20-40% by weight of pozzolan, 60-80% by weight of gypsum plaster, and 1-3% by weight of a natural adhesive, and using the gypsum composition. Gypsum board and the technology regarding the prefabricated gypsum board panel is disclosed,

Korean Laid-Open Publication No. 10-2002-50990 discloses the production of asbestos-free slag board comprising the step of blending a raw material slurry containing slag in pulp, homogenizing in Chester, and then sheeting and forming a multilayer in an agitator. In the method, there is described a method for producing an asbestos-free slag board comprising the step of adding a cationic flocculant to the raw material slurry discharged from Chester,

Korean Patent Publication No. 10-855122 discloses a slag gypsum board composition and a high-strength slag gypsum board manufacturing method consisting of slag, hemihydrate gypsum, limestone, kraft pulp, polyvinyl alcohol fiber, wollastonite, slaked lime and anionic coagulant. Listed,

Korean Patent Publication No. 10-762893 discloses a coating material powder comprising ocher powder, waste gypsum powder and blast furnace slag; And water; It consists of the main features of the configuration. At this time, the ocher powder is contained in 35 to 45% by weight based on the total coating material powder, the gypsum powder is contained in 5 to 8% by weight relative to the total coating material powder, the blast furnace slag is 50 ~ to the total coating powder The coating material for surface treatment of ocher boards or charcoal boards, which is contained in 60% by weight, is described,

In Korean Patent Publication No. 10-102968, the slag-containing compounding material is based on the weight percent of hydrolyzed slag: 40-70%, gypsum: 3-33%, slaked lime: 1-5%, and reinforcement: 5-15%. As a component, the technical composition which added so that calcium carbonate: 20% or less and pearlite: 20% or less is added individually or in combination, and the sum of these addition amounts is 5-20% is disclosed,

Korean Patent Publication No. 10-628848 discloses an inorganic activator consisting of 12 to 30 weight of hydration reaction activator consisting of fine waste powder and fine waste lime powder and 70 to 88 weight of blast furnace slag fine powder having a specific surface area of 6,000 to 12,000 cm2 / g. Listed,

  Publication No. 10-813862 discloses 20-30% by weight of gypsum, 40-60% by weight of lime, 8-10% by weight of blast furnace slag, 8-10% by weight of fly ash, 0.99-4.9% by weight of magnesia, quickness It can be seen that a lime-based solidifying material composed of 3 to 5% by weight of clinker mineral and 0.01 to 0.1% by weight of anionic flocculant is disclosed.

Recently, many researches and efforts have been made for the development of eco-friendly materials in the field of building materials, and various materials having antibacterial properties have been developed and are coming to the market. However, the development of eco-friendly antibacterial materials that can satisfy all of the manifestation of the performance, the persistence of the performance, aesthetic performance, environmental harmlessness, etc. has not been achieved.

The present invention to solve the above problems

The present invention is 32.5% by weight of blast furnace slag powder, 6.8% by weight of lime, 1.7% by weight of gypsum, 35.8% by weight of silica sand with a diameter of 0.5 mm or less, 0.8% by weight of polypropylene fiber of 30 to 60mm in diameter, 0.8% by weight of inorganic pigment, mugwort To provide an environment-friendly antimicrobial board composition using industrial waste, characterized in that the composition is 0.4% by weight, 0.4% by weight of organic antimicrobial agent, 20.8% by weight, and a method for manufacturing the same will be.

The present invention is a high functional product having antibacterial performance at a low production cost using a large amount of industrial by-products, and is capable of generating technological competitiveness and high profits, and promoting recycling of industrial by-products, suppressing environmental pollution, and creating a sanitary living environment. It is expected to have a large ripple effect because it can be expanded to construction finishing materials such as antibacterial mortar and panels.

1) The product to be developed was manufactured by using a small amount of lime and gypsum as alkali stimulant in blast furnace slag powder (pozzolanic material), an industrial by-product, without using cement as a binder. Therefore, the developed product is an eco-friendly material that is harmless to human body and it is a high value-added material while greatly reducing the production cost.

2) The blast furnace slag powder, which is the main component of the developed product, is a fine powder of white color (achromatic color), and is developed as a eco-friendly antibacterial board with a variety of colors using inorganic pigments of various colors.

3) It also has the advantage of satisfying the level of quality (water content, elasticity, heat resistance, tensile and bending strength, etc.) required as building board material by mixing 0.8 wt% of polypropylene fiber of 30 ~ 60mm in the binder.

In order to solve the above problems, the present invention is blast furnace slag powder 32.5% by weight, 6.8% by weight of lime, gypsum 1.7% by weight, 35.8% by weight of silica sand with a diameter of 0.5mm or less, polypropylene fiber of 30 to 60mm in diameter Environmentally friendly antimicrobial board composition using industrial waste, characterized in that the composition is composed of 0.8% by weight, inorganic pigment 0.8% by weight, mugwort powder 0.4% by weight, organic antimicrobial agent 0.4% by weight, blending water 20.8% by weight will be.

Blast furnace slag powder to be produced as an industrial by-product from the mill is and siliceous (SiO ₂₎ is the main component and calcium hydroxide is produced from lime and gypsum (Ca (OH) ₂₎ and reactions (pozzolanic reaction) to produce a calcium silicate hydrate of a water-insoluble, The resulting hydrate is a stable substance with a very high strength as a structure having a dense structure. In particular, the blast furnace slag powder, which is white (uncolored), can be colored in various colors using inorganic pigments, and has an advantage of greatly reducing manufacturing costs.

Accordingly, the present invention is a binder (binder) as an industrial by-product blast furnace slag powder as a main component of a small amount of slaked lime, gypsum, inorganic pigments, polypropylene fibers, and mixed with the natural antibacterial substances mugwort powder and wood vinegar solution and water After mixing and molding together, it is an eco-friendly color antibacterial board and manufacturing method manufactured by standard underwater curing (or high temperature (90 ℃) in case of high strength).

In the present invention, the blast furnace slag powder contains a large amount of silica (SiO ₂ ), which is not hydraulic but reacts with an alkali stimulant such as calcium hydroxide (Ca (OH) ₂ ) to produce an insoluble calcium silicate hydrate. As a pozzolanic material, it was used as a binder to react with hydrated lime and gypsum (alkali stimulant) to produce insoluble calcium silicate hydrate (a high strength and chemically stable material as a CSH gel).

Slaked lime and gypsum were used as alkali stimulants to promote the pozzolanic reaction of blast furnace slag powder, and polypropylene fiber (PP fiber ) to give toughness to the matrix and to prevent cracking due to dry shrinkage, Inorganic pigments were used to pour a variety of colors, and finally, mugwort powder and organic antimicrobial agents were used to impart antimicrobial activity, and their chemical and physical properties are shown in Table 1.

In the present invention, the reason for limiting the mixing amount of each used material is that the optimum combination is formulated to have more than the properties (necessary compression and bending strength, absorption rate, density, etc.) required for the invented antimicrobial board to be used as a building finishing material for construction. In this case, the amount of the antimicrobial agent was also limited to a certain amount in consideration of antimicrobial performance and economical efficiency (material cost, etc.) of the antimicrobial board.

That is, in detail, each weight ratio of blast furnace slag powder, slaked lime, lime and silica sand (fine aggregate) as binders showed the highest strength (compression and warpage) by maximally activating the pozzolanic reaction of blast furnace slag powder, which is a pozzolan material. Optimum blend In addition, the amount of polypropylene fiber was used in a minimum amount that can suppress the bending and tensile strength required for boards, the ability to inhibit dry shrinkage cracking and fiber-ball, and the antimicrobial agent expressed antibacterial performance and economical efficiency. In consideration of the back, it is limited to the optimum amount.

Hereinafter, the present invention will be described in detail with reference to the following Examples.

Example 1

To prepare a mixture of 1m ³ blast furnace slag powder 952 kg, 200 kg slaked lime, gypsum 48 kg, the diameter size of 0.5mm or less silica sand 1050 kg, the diameter 30~60mm polypropylene fibers 24 kg, 24 kg of inorganic pigments, mugwort powder 12 kg, 12 kg of organic antimicrobial agents, 610 kg of mixed water were mixed in a stirrer, and then the mixture was poured into a mold to prepare an eco-friendly antibacterial board using industrial waste.

Example 2

To prepare a mixture of 1m ³ blast furnace slag powder 952 kg, 200 kg slaked lime, gypsum 48 kg, the diameter size of 0.5mm or less silica sand 1050 kg, the diameter 30~60mm polypropylene fibers 24 kg, 24 kg of inorganic pigments, mugwort powder 12 kg, 12 kg of wood vinegar, 610 kg of mixed water were mixed in a stirrer, and then the mixture was poured into a mold to prepare an eco-friendly antibacterial board using industrial waste. This formulation is a mixture of wood vinegar, which is a natural antimicrobial agent extracted from natural substances instead of an organic antimicrobial agent in the same weight ratio, and is used for the manufacture of eco-friendly antibacterial board.

The composition of the eco-friendly antimicrobial board using the industrial waste prepared as described above is blast furnace slag powder 32.5% by weight, slaked lime 6.8% by weight, gypsum 1.7% by weight, 35.8% by weight of silica sand with a diameter of 0.5mm or less, diameter 30 ~ It can be seen that the composition is composed of 0.8% by weight of polypropylene fiber of 60mm, 0.8% by weight of inorganic pigment, 0.4% by weight of mugwort powder, 0.4% by weight of organic antimicrobial agent, and 20.8% by weight of water.

Experimental Example 1 (The curing method and physical and mechanical properties of antibacterial board)

1) Antimicrobial board for general strength was cured in standard (20 ± 5 ℃) water, and the compressive and flexural strength of 28 days was 25 ~ 30 MPa and 5 ~ 6 MPa, and the water absorption (28d) was 15 ~ 17%. The level and density (28d) were found to be 1.8 to 1.9 kg / cm ³ level, respectively.

2) And high strength antibacterial board was cured under high temperature (90 ℃), 28-day compressive and flexural strength of 40 ~ 50 MPa, 7 ~ 8 MPa, absorption rate (28d) was 5 ~ 10% level, Density 28d was found to be 2.0-2.2 kg / cm ³ level, respectively.

Experimental Example 2 (antibacterial test)

   a. Specimen Preparation and Culture

After neutralizing the specimen prepared according to the test formulation table, form a medium by adding water, nutrients (weight to water) and agar 3% (weight to water) to the Erlenmeyer flask, respectively. Are sterilized in an autoclave at 125 ° C. for about 15 minutes. In addition, after the liquid medium is poured onto the platen plate and the medium is colonized, the prepared strains are spread evenly over the medium in the same amount, and the specimens are placed in contact with the center part and sealed to prevent other bacteria from invading. Then incubated in an incubator.

  b. Evaluation of antimicrobial performance

As in the method of AATCC (Antimicrobial Activity Assessment of Carpet) test method 90 ^3), the specimen is placed on the plate medium inoculated with the test strain so as to be in contact with the medium, then cultured in an incubator and suppressed the growth of bacteria around the specimen. By measuring the size of the bacterial low zone as shown in formula (1) was presented as a visible standard of antimicrobial activity. Antimicrobial performance evaluation method is as shown in FIG. At this time, the width of the bacterial lowlands was evaluated by averaging maximum and minimum values.

(1)

(One)

  Where I is the width of the bacterial lowland (mm), D is the total diameter of the sample and the lowland (mm), and R is the diameter of the sample (mm).

Experimental Example 3 (Antibacterial Activity of Antimicrobial Agents)

As a result of evaluating the antimicrobial activity of each antimicrobial agent, as shown in Figure 2, the antimicrobial activity of all antimicrobial agents (see Table 1) was found to be very excellent compared to the plain (blank test).

Table 1. Chemical and physical properties of used antimicrobials

division Property Organic fungicides M-8 Mugwort ingredient Isothiazolone series and
Carbamate Complex Nitropurene system O-coumaric acid
pH 4.5-7.0 (1% water suspension) - - importance 1.00 ～ 1.10 - - Exterior Milky White Aqueous Suspension Transparent aqueous liquid phase Powder (0.1-10mm)

Experimental Example 4 (Antibacterial Activity of Antibacterial Mortar)

The antimicrobial activity of antimicrobial mortars mixed with various antimicrobial agents differed according to the antimicrobial agents. As shown in FIG. 3, the antimicrobial performance of the antimicrobial mortar incorporating the antimicrobial agent of M-8 was the same as that of ordinary mortar without the antimicrobial agent, even at a 5% incorporation rate. However, mugwort powder and organic antimicrobial agents were found to have excellent antimicrobial properties even when incorporated into antimicrobial mortars as well as their antimicrobial properties.

Table 2. Antimicrobial Performance of Antimicrobial Mortar Containing Mugwort Powder and Organic Antibacterial Agent

(Unit: kg / m ³ )

Types of Psalms Binder Quartz sand
(0.5mm or less) Polypro
Pelen Fiber Formulation water Mugwort Powder +
Organic antimicrobial agents Bacterial lowland
(Inhibition Zone, mm) Blast Furnace Slag Powder Slaked lime gypsum AF-0


952


200


48 1098


24 610 0 0 AF-1 1095 610 3 (0.25% ^* ) 2.3 AF-2 1090 612 6 (0.5%) 3.5 AF-3 1083 613 12 (1.0%) 4 AF-4 1070 614 24 (2.0%) 6.25 AF-5 1030 618 60 (5.0%) 15.7 AF-6 963 625 120 (10.0%) 18.35

^* Mass ratio (%) to binder (blast furnace slag powder + slaked lime + gypsum)

Table 2 and Figure 4 shows the antimicrobial performance of each antimicrobial mortar produced by varying the mixing ratio of mugwort powder and organic antibacterial agent. As can be seen in Table 1 and Figure 4, the antimicrobial activity of the antimicrobial mortar mixed with wormwood powder and organic antimicrobial agent showed an excellent antimicrobial activity compared to the ordinary mortar (Plain), the antimicrobial activity is increased as the incorporation rate of the antimicrobial agent increased It was found to increase significantly.

In addition, Figure 5 shows the antimicrobial performance of the antibacterial mortar mixed with wormwood powder and organic antibacterial agent according to the antimicrobial agent incorporation rate. As can be seen in Figure 5 the antimicrobial performance of the antibacterial mortar mixed with wormwood powder and organic antimicrobial agent is increased as the antimicrobial agent incorporation rate is increased, in particular sharply increased at 1% or more. Therefore, considering the antimicrobial performance and economical efficiency of the antimicrobial mortar, it is determined that the proper mixing ratio is about 1% to 3% (mass ratio to the binder).

  Experimental Example 5 (Long-term antimicrobial activity of antibacterial mortar)

The long-term antimicrobial performance of the antimicrobial mortar was evaluated by repeating the antimicrobial activity assessment of Carpet (AATCC) test method 90) on the same specimen two or more times. Long-term antimicrobial activity was evaluated by measuring antimicrobial activity in the same manner.

6 is a result of measuring the long-term antibacterial performance of the antibacterial mortar mixed with wormwood powder and organic antibacterial agent. In order to evaluate the long-term antimicrobial performance of the antimicrobial mortar, the antimicrobial performance test was carried out on the test specimens 2 days old and 2 weeks later (age 14 days), the antimicrobial performance was measured for the same specimens by the same method. As can be seen in FIG. 6, the antimicrobial activity of the antimicrobial mortar measured two weeks after the antimicrobial test was continued to maintain the same level of antimicrobial activity without significant change with the antimicrobial activity initially measured (day 2). It shows the long-term antimicrobial performance of antibacterial mortar mixed with wormwood powder and organic antibacterial agent.

1 antimicrobial performance evaluation method

Figure 2 Antimicrobial Performance of Antimicrobial Agents

Figure 3 antibacterial performance of the antibacterial mortar mixed with various antibacterial agents (antibacterial incorporation rate is the mass ratio to the binder)

Figure 4 antimicrobial performance of antibacterial mortar mixed with wormwood powder and organic antibacterial agent according to the antimicrobial agent incorporation rate (mass ratio to binder)

5 antibacterial performance of the antibacterial mortar according to the mixing ratio (mass ratio of the binder) of the mugwort powder and the organic antibacterial agent

Figure 6 Long-term antimicrobial performance of antibacterial mortar added with wormwood powder and organic antibacterial agent (antibacterial incorporation rate is the mass ratio of the binder)

Claims (2)

In the eco-friendly antibacterial board composition using industrial waste, Blast furnace slag powder 32.5% by weight, slaked lime 6.8% by weight, gypsum 1.7% by weight, 35.8% by weight of silica sand with a diameter of 0.5 mm or less, 0.8% by weight of polypropylene fiber with a diameter of 30 to 60 mm, inorganic pigment 0.8% by weight, mugwort powder 0.4% by weight Eco-friendly antimicrobial board composition using industrial waste, characterized in that the composition is composed of%, organic antibacterial 0.4% by weight, 20.8% by weight. In the manufacturing method of eco-friendly antibacterial board using industrial waste, Blast furnace slag powder 32.5% by weight, slaked lime 6.8% by weight, gypsum 1.7% by weight, 35.8% by weight of silica sand with a diameter of 0.5 mm or less, 0.8% by weight of polypropylene fiber with a diameter of 30 to 60 mm, inorganic pigment 0.8% by weight, mugwort powder 0.4% by weight %, Organic antimicrobial agent 0.4% by weight, 20.8% by weight of the mixing water mixed in a stirrer, and then the mixture is poured into a mold to produce an eco-friendly antimicrobial board using industrial wastes.

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