KR101272663B1 - Coating agent for solidity stabilization of asbestos and method for solidity stabilization of asbestos using the same - Google Patents

Abstract

PURPOSE: A coating composition for stabilizing asbestos solidity is provided to prevent outflow and scattering of asbestos from a construction material containing asbestos with low costs, and to use inorganic binder, thereby not generating Volatile Organic Compound; VOC which is harmful to the human body. CONSTITUTION: A coating composition for stabilizing asbestos solidity comprises: 100 wt% of water; 30-40 wt% of more than one silica-based inorganic binder selected among colloidal silica, sodium silicate, and potassium silicate; 10-15 wt% of alumina sol; 0.5-2 wt% of potassium phosphate; 5-10 wt% of bentonite; 10-15 wt% of calcium carbonate; 10-15 wt% of phytoncide; and 10-15 wt% of Chinese juniper powder. An asbestos solidity stabilizing method of a construction material containing asbestos solidity uses the coating composition for stabilizing asbestos solidity. An asbestos solidity stabilizing method of a construction material containing asbestos solidity comprises the following steps: coating the coating composition on a construction material containing asbestos solidity and drying(first coating step); coating a flame retardant on the construction material and drying(second coating step); and coating phytoncide, an antibacterial deodorant containing a natural herb substance on the construction material and drying.

Description

Coating composition for asbestos solid stabilization and asbestos solid stabilization treatment method using the same {Coating agent for Solidity Stabilization of Asbestos and Method for Solidity Stabilization of Asbestos using the same}

The present invention relates to a coating composition for asbestos solid stabilization, and specifically, asbestos solid stabilization to prevent asbestos from being scattered by applying a coating composition for asbestos solid stabilization to a building including asbestos-containing building materials or asbestos building materials. It relates to a treatment method.

Asbestos is a building material with excellent mechanical strength and excellent incombustibility, insulation, durability, insulation and insulation. It is used for various purposes in various industries such as fireproof, fireproof, insulation, insulation, roofing (slate) and electrical insulation. It has been widely used for a long time.

However, when asbestos dust is inhaled through the respiratory organs for a long time, asbestos is known to be harmful to the human body, such as asbestosis (pulmonary nephropathy), lung cancer, and malignant mesothelioma. As the regulations on the use of asbestos have been announced in earnest, the use of foam asbestos is rarely used anymore.However, asbestos-containing building materials, which have been installed in public structures such as subways, houses, and buildings for a long time, Since there is a problem of spilled and scattered materials, the necessity of dismantling these asbestos-containing building materials is increasing. The government has regulated the use of asbestos since the announcement of the "Asbestos Management Comprehensive Measures" in 2007. Investigate the actual condition of asbestos-sensitive facilities and public buildings such as schools and hospitals. It is pursuing a plan to create and manage the results as "asbestos-map ', and ultimately has plans to proceed with the disposal of asbestos-containing building materials from schools and public facilities.

The comprehensive measures for asbestos management are being promoted to dispose of asbestos-containing building materials. However, in order to dispose of asbestos-containing building materials, asbestos-containing building materials must be dismantled from buildings, buildings, etc. Asbestos is an expensive operation, and as a result of polluting the surrounding environment due to asbestos scattering in the process of dismantling and dismantling of waste, it can cause secondary pollution or worsen the work environment of the workplace, which may damage workers' health. The process of dismantling building materials is strictly regulated against the prevention of asbestos scattering.

Asbestos safety management is best to be removed completely without creating a scattering situation, but asbestos safety management due to the dismantling and disposal of asbestos-containing building materials is necessary for restoration work in the case of buildings with high cost and long service life. As a result of the cost and recycling of resources, asbestos solid stabilization technology has been developed as a method of stabilizing asbestos building materials without disassembling asbestos-containing building materials in buildings.

      As a prior art related to the asbestos solid stabilization technology, for example, in the domestic registered patent publication No. 10-0981944, calcium carbonate, acryl-based to stabilize the asbestos by applying to the surface of the building material without disassembling the building material containing asbestos Asbestos solid stabilization solvent consisting of resin and natural oil is disclosed, and in Korean Patent Publication No. 1194675, a coating agent consisting of a curing agent-containing epoxy resin and cement is applied to the surface of an asbestos-containing material twice and cured. Asbestos solid stabilization treatment method is disclosed, but these prior art is to use the organic polymer resin in the interior of the building, such as the problem of damaging the human body or harming the health by the generation of volatile organic compound (VOC) from the organic polymer resin This can be.

In addition, a spray consisting of silicon dioxide (SiO2), boric acid (H3BO4) and potassium hydroxide, which can prevent scattering by spraying a stabilizer without dismantling or dismantling the asbestos-containing material constructed in Korea Patent Publication No. 10-1146488 Although the asbestos stabilizer is disclosed, such prior art has a problem in that the stabilizing effect of asbestos cannot be maintained due to the detachment of the stabilizer due to the weak adhesion and adhesion of the inorganic component, and there is a problem in spraying the stabilizer from time to time.

The present invention has completed the present invention by ameliorating the above-mentioned problems of the prior art by the combination of an inorganic adhesive with high asbestos, a functional ceramic and a natural product.

The present invention aims to provide a solid stabilization coating composition for asbestos stabilizing asbestos-containing building materials without disassembling asbestos-containing building materials in buildings and as a method of solid stabilization of asbestos using the same. Asbestos-containing building materials using asbestos solid stabilizing coating composition that does not cause volatile organic compounds (VOCs) and environmental hormones that are harmful to the human body by using high affinity inorganic binder components and natural substances It is an object of the present invention to provide a solid stabilization treatment method for asbestos that stabilizes asbestos-containing building materials without dismantling asbestos-containing building materials in buildings.

Asbestos solid stabilizer coating composition of the present invention as a means for solving the object aimed at the present invention is selected from colloidal silica, sodium silicate and potassium silicate based on 100 parts by weight of water 30 ~ 40 Part by weight, 10 to 15 parts by weight of alumina sol, 0.5 to 2 parts by weight of potassium phosphate, 5 to 10 parts by weight of bentonite, 10 to 15 parts by weight of calcium carbonate, 10 to 15 parts by weight of phytoncide and 10 to 15 parts by weight of juniper powder It consists of

Asbestos solid stabilizing coating composition according to the present invention is characterized in that the inorganic binder component, but in general, the inorganic binder component itself is difficult to form a coating film compared to the organic binder, because the adhesive strength and durability is weak In the present invention, a combination of alumina sol and at least one silica-based inorganic binder selected from colloidal silica, sodium silicate and potassium silicate, which are easily formed at room temperature, among the well known inorganic binder materials, and alumina sol has a film forming property. It has excellent properties of adhesion and bonding, so it is used together with the silica-based inorganic binder component to increase the good adhesion and durability of the coating film.

The potassium phosphate is combined to increase the dissolution resistance of the silica-based inorganic binder to water, and the viscosity of the binder increases as the amount of potassium phosphate is increased. It is not good, and cracks occur, and since the concentration of potassium phosphate affects the drying time and viscosity of the liquid inorganic binder, it is preferable to use potassium phosphate at 2 to 5% by weight of the total weight of the silica-based inorganic binder. .

The bentonite and calcium carbonate are inorganic ceramic materials and play a role as a filler with non-combustibility, the particle size distribution of 1 ~ 100㎛ and the average particle diameter of 20㎛ good dispersibility, especially bentonite in the present invention not only heat resistance Since it exhibits cohesiveness, it penetrates asbestos, improves heat resistance and adhesion, and is used in combination to prevent sedimentation and viscosity control of ceramic materials of solid stabilizing coating compositions.

The phytoncide (Phytoncide) is an extract extracted from about 30 kinds of plants such as pine, cypress, cypress, cedar, cypress, fir, black pine, red pine, spruce, camphor, tea, citrus, nettle, wormwood, aloe, and vinegar It is known as a natural antiseptic, insect repellent exhibiting pharmacological action, such as bactericidal power, psychological stability, strengthening of cardiopulmonary function, skin disinfection, and makes it more environmentally friendly by adding to the stabilizing coating composition of the present invention.

In addition, the phytoncide may be blended by being supported on bentonite or impregnated with anti-tree, and then dried and pulverized to be blended into a solid stabilizing coating composition.

The juniper powder is combined with the solid stabilization coating composition to improve the impact resistance of the coating film formed by the inorganic binder to prevent cracking and crack formation of the coating film to increase the durability of the coating film formed of the inorganic binder, and also inherent characteristics of juniper wood Phosphorus direction and insecticidal effect are also shown, and it is preferable to use 200 to 500 mesh finely ground powder.

And asbestos solid stabilization method using the coating composition for asbestos solid stabilization of the present invention comprises: a) a first coating step of applying and drying the asbestos solid stabilizing coating composition of the present invention to the building material containing; b) a second application step of applying and drying a flame retardant to the asbestos-containing building material following the first application step; c) a second application step followed by a third application step of applying and drying the natural aromatic antibacterial deodorant.

The first and second application steps according to the present invention can be applied by using a suitable application means, such as a nebulizer, a roller applicator, and there is no particular limitation on the application means.

In addition, the coating amount of the first coating step and the second coating step is preferably applied at 300 ~ 400g / ㎡, the coating film thickness of the first coating step is 0.25 ~ 0.29mm, the coating film thickness of the second coating step is 0.27 ~ 0.32mm It is preferable to apply twice, so that the third application step is to apply a natural aromatic antibacterial deodorant once or twice using an ultrafine atomizer.

The flame retardant is a well-known inorganic flame retardant is selected from, for example, polyphosphate, red phosphorus, Mg (OH) ₂ and zinc borate, and the natural aromatic antibacterial deodorant phytoncide, natural fragrance containing a natural herbal substance It is possible to use the aromatic antibacterial deodorant which is widely marketed as an antibacterial deodorant, and there is no restriction | limiting in particular.

And the working conditions for solid stabilizing the surface of the asbestos-containing building material using the asbestos solid stabilization coating composition according to the present invention, the moisture content of the building material is less than 17% by weight, the appropriate temperature for the work is 5 ℃ ~ 30 ℃ It is preferable that the relative humidity is 85% or less relative humidity.

Generally, asbestos-containing building materials are dismantled to prevent asbestos leakage and scattering from asbestos-containing building materials, but the present invention utilizes asbestos-solid stabilizing coating composition to stabilize asbestos without dismantling asbestos-containing building materials. This prevents asbestos spills and scatters from asbestos-containing building materials at low cost. In addition, inorganic binders prevent the generation of volatile organic compounds (VOCs) that are harmful to humans. It has advantages.

1 is a photograph related to asbestos deposition dust test according to the asbestos solid stabilization treatment of the present invention.
Figure 2 is a component analysis data related to asbestos deposition dust test according to the asbestos solid stabilization treatment of the present invention.

Hereinafter, the coating composition for asbestos solid stabilization and asbestos solid stabilization method according to the present invention will be described in more detail with reference to Examples and Test Examples. The following examples and test examples do not limit the technical spirit of the present invention.

<Examples>

15 parts by weight of colloidal silica, 20 parts by weight of sodium silicate, 10 parts by weight of alumina sol, 1.5 parts by weight of potassium phosphate, 5 parts by weight of bentonite, 10 parts by weight of calcium carbonate, 10 parts by weight of phytoncide and 5 parts of juniper powder The mixture was mixed and stirred at 900 RPM for 4 hours to prepare a viscous asbestos solid stabilizing coating composition according to the present invention.

The coating composition for asbestos solid stabilization was applied twice to a sample prepared in advance, and then a natural aromatic antibacterial deodorant containing a flame retardant and a natural herb substance was sequentially applied, dried and stabilized.

<Test Example>

Asbestos was not detected as a result of measuring the asbestos deposit dust for the solid stabilization treatment according to the indoor air quality process test criteria using the following test method and test equipment for the sample stabilized by the <Example>. (See FIG. 1 and FIG. 2)

<Test Method>

According to the process test method US EPA 600 / R-93 / 116, it is analyzed by using a polarizing microscope (PLM) and then comprehensively determined by analyzing the components by FE-SEM (electron microscope) with an EDS (component analyzer).

Claims (5)

30 to 40 parts by weight of at least one silica-based inorganic binder selected from colloidal silica, sodium silicate and potassium silicate, 10 to 15 parts by weight of alumina sol, 0.5 to 2 parts by weight of potassium phosphate, and 5 to 10 parts by weight of water A coating composition for asbestos solid stabilization, characterized in that the composition is composed of 10 parts by weight, 10 to 15 parts by weight of calcium carbonate, 10 to 15 parts by weight of phytoncide and 10 to 15 parts by weight of juniper powder. The coating composition for asbestos solid stabilization according to claim 1, wherein the phytoncide is formed by being supported on bentonite or impregnated with cedar powder. In the method for solid stabilization of asbestos using the coating composition for asbestos solid stabilization of claim 1,
a). A first coating step of applying and drying a coating composition for asbestos solid stabilization according to claim 1 to an asbestos-containing building material;
b). A second coating step of applying and drying a flame retardant to the asbestos-containing building material following the first coating step;
c) a method of asbestos solid stabilization of asbestos-containing building material, comprising a third application step of applying and drying a phytoncide and an aromatic antibacterial deodorant containing a natural herbal material following the second application step. The asbestos solid of asbestos-containing building material according to claim 3, wherein the stabilization treatment method is stabilized under working conditions of 17% by weight or less of moisture of the building material, 5 ° C to 30 ° C of working temperature, and 85% of relative humidity. Stabilization treatment method. The method for asbestos solid stabilization of asbestos-containing building material according to claim 3 or 4, wherein the coating amounts of the first coating step and the second coating step are 300 to 400 g / m 2.

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