KR101025331B1 - A composite of eco-friendly inorganic materials for surface finishing of concrete floor and/or cementitious materials wall - Google Patents
A composite of eco-friendly inorganic materials for surface finishing of concrete floor and/or cementitious materials wall Download PDFInfo
- Publication number
- KR101025331B1 KR101025331B1 KR1020100042383A KR20100042383A KR101025331B1 KR 101025331 B1 KR101025331 B1 KR 101025331B1 KR 1020100042383 A KR1020100042383 A KR 1020100042383A KR 20100042383 A KR20100042383 A KR 20100042383A KR 101025331 B1 KR101025331 B1 KR 101025331B1
- Authority
- KR
- South Korea
- Prior art keywords
- weight
- parts
- composition
- minutes
- degrees celsius
- Prior art date
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/24—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing alkyl, ammonium or metal silicates; containing silica sols
- C04B28/26—Silicates of the alkali metals
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The present invention relates to an environment-friendly inorganic surface and floor finish as a construction material having a waterproof and durable, the exhaust gas of automobiles focusing on porous silica medium having micrometer-sized pores, elite natural minerals and alkali silicate inorganic binders. It has a function of removing nitrous acid gas from the atmosphere which is the main cause of air pollution due to, etc., and the crack does not occur even after the surface finish by the alkali silicate-based inorganic binder, and alkali silicate-based mineral in the pores of the concrete sphere. By filling the pores inside the concrete by the penetration and bonding characteristics of the binder, it blocks not only the penetration of harmful gases from outside, waste oil generated from automobiles, nitrite gas from automobile exhaust gas, but also by porous silica medium. Adsorbs nitrous and sulfurous gases in the air and decomposes nitrous and sulphite gases in the air by elite natural minerals to reduce environmental pollution. to provide.
Description
The present invention has a function of protecting concrete spheres by placing on the surface of concrete, tile, wood, etc. civil wet structure, by providing a photocatalytic oxidation function on the surface to oxidize and decompose harmful gases or ions in the atmosphere Adhesion and water resistance by liquid alkali silicate-based materials inside mortar, and harmful ions, water and other oil components (petrol, automobile oil, etc.) harmful to cement and concrete materials from outside It is excellent in ion exchange performance that has excellent function of blocking the penetration of these harmful substances into pores, oxidative decomposition function, and excellent decomposition function of harmful gases such as nitrous gas and sulfurous acid gas, using natural illite mineral with photodegradation function. Of environmentally friendly inorganic surface and floor finishing compositions The.
In concrete, cracks are inevitably generated during the hardening process, and this crack facilitates the penetration of water or various salts harmful to concrete, ie, nitrite and sulfite salts in the atmosphere, and harmful salts penetrate into the concrete. However, concrete deteriorates due to water, and the building deteriorates quickly.
In addition, the plaster tiles for interior and exterior of the building is often dropped due to deterioration due to the neutralization of concrete, and even if not dropped out, the contamination tiles exist in a severe state.
In addition, in Korea, the seriousness of pollution caused by nitrite gas in the air is quite worrying.
Among the contents of the nitrite gas shot at the EU environmental symposium, envisat 2006, in April 2007, Korea and the eastern part of China have the highest level of nitrite gas pollution. Is serious.
In the symposium published in 2003, the UK and France neighborhoods in Europe were very serious, but due to various efforts of the European Union, much of the nitrous gas contamination was reported in 2006.
Reducing pollution by atmospheric nitrite gases is the only way to reduce vehicle use and chemical treatment.
In fact, reducing the use of automobiles in Korea is not possible until the national consensus is formed, and the government's efforts must find a technical solution in addition to the national consensus.
As a technical solution, there is a method of applying a photocatalyst, which has recently been highlighted and many studies are being conducted.
However, there are many problems in applying the photocatalyst and thus it is not easy to use.
That is, since the liquid photocatalyst cannot simply be sprayed into the atmosphere, it is necessary to find a method of mixing with other materials, whether liquid or powder.
However, the mixed use with other materials does not find a practical solution due to problems such as price or activation of a photocatalyst.
Generally, about 20 years after the construction of these buildings, these buildings are not functioning properly due to the deterioration of the durability of concrete.However, it is economically and environmentally effective to remove all of them and build new ones. This is impossible from the perspective.
As a method to restore the performance of the building again, a variety of re-modeling materials are used to enhance the performance. Particularly, in view of the cement material, the cement material is based on the cement material. The use of composite materials is gradually expanding.
Cement material is a very good material in terms of economical and high strength material, but various disadvantages have been exposed due to the weakness of porosity.
In order to make up for the weakness of the cement-based materials, polymer cement mortars having organic functions in the cement-based materials are used as re-modeling materials for buildings, and some of them have already applied such re-modeling methods from new buildings.
However, the polymer cement mortar is a useful material that can compensate for the disadvantages of the cement-based material, which is an inorganic material. However, a variety of problems caused by the combination of the inorganic material and the organic material have resulted in a decrease in surface adhesion performance and a decrease in breathability.
In the prior art and patents relating to polymer cement mortar, Korean Patent No. 294805 discloses a waterproofing agent composed of 23-31 parts by weight of acrylic resin, 23-31 parts by weight of cement, 30-48 parts by weight of silica sand and other additives. And
Korean Patent Publication No. 2000-17879 discloses a waterproofing agent composed of 57% cement, 7% silica sand, ethylene vinyl acetate%, 1% activated silica, and 34% water.
In addition, Korean Laid-Open Patent Publication No. 2002-31684 mixes A agent composed of emulsified and dispersed calcium stearate and an acrylic emulsion water copolymer, and B agent composed of back cement, silica sand, polyoxyethylene lauryl ether, and the like in a 1: 0.25 weight ratio. A waterproofing agent comprising a step is disclosed.
In addition, Korean Laid-Open Patent Publication No. 10-2004-0067060 discloses a heat-insulating waterproof mortar composed of cement silica sand, magnesium stearate, EVA, senosphere, and the like.
These conventional techniques are relatively stable in performance can be used in a variety of indoor and basement, such as buildings.
However, these conventional technologies are all materials mainly composed of cement, and when a crack occurs due to dry shrinkage of a cement material, water leaks through the cracks.
Polymer cement mortar is a material that has a complex function of organic and inorganic materials. Currently, it replaces other finishing materials with various methods or finishes, but since cement materials are basically used, it is possible to prevent the occurrence of cracks, which are characteristics of cement materials. There is no proper measure for water leakage, penetration of harmful ions, etc., and long-term durability problems such as deterioration of waterproofing performance due to hot and cold repetition and lack of penetration resistance of harmful ions in countries where the four seasons are obvious like Korea. Is appearing.
As for the polymer mortar composite, in Korean Patent Laid-Open No. 2000-0000485, a polymer mortar resin is prepared by curing an unsaturated polyester mortar resin in a mold mold and curing at 20 ° C. due to the use of an unsaturated polyester resin. Curing at room temperature is difficult, and inconvenient application and construction in various forms in a general building, there is a disadvantage that the scope is limited to molded products only.
In addition, Korean Patent Application Laid-Open No. 2001-0046911 proposes a method for mixing a mortar by removing a diaphragm before the mortar is cured after installing a removable diaphragm in the center of manufacturing a polymer mortar and a cement mortar composite. There is a problem that cannot be used.
In addition, re-modeling requires the removal of previously used materials, but considering that previously used materials may not be completely removed, it is necessary to overwrite the surfaces of the previously used materials. Good affinity with the material, i.e. adhesion performance.
However, if the existing materials were constructed with tiles, but some of them fell apart, there is a problem in that they cannot be constructed in the same way, and after re-installing the tiles after removing the entire tile, there are problems such as economic and construction period. In addition, even in the case of finishing the construction with epoxy resin, urethane resin, etc., there is also a problem of partial reinforcement.
In addition, Patent No. 10-0519838-0000, filed and registered by the inventor of the present invention and another co-inventor, uses a cement-based material and a reemulsified dispersed polymer to manufacture polymer cement mortar. Although the method of use is suggested, there is no mention of cracks that may occur after the use of these materials, and therefore, there is no problem in preventing leakage or penetration of harmful ions due to the occurrence of cracks.
In addition, in Korean Patent Laid-Open Publication No. 10-2005-0055654, which was originally filed by the inventor of the present invention and changed to another inventor, the polymer cement mortar functionally mixed with cement mortar and concrete and self-healing when a cement or concrete crack occurs Presented.
However, in the case of Korea Patent Publication No. 10-2005-0055654, since the function of healing the crack occurs only by the continuous supply of water to the crack, the basement layer used as an environment in which it is difficult to continuously contact the water or as a car parking lot of a multi-family housing complex. When used in the automobile, the deterioration of concrete, such as carbon dioxide or sulfurous acid gas, which occurs most frequently in the penetration or contamination by oil generated in the vehicle has a problem that does not exhibit any durable performance.
An object of the present invention for solving and solving the problems of the prior art,
It is applied to the surface of construction materials such as the surface of concrete spheres or other cement-based materials, and has a function to protect the cracks of the spheres generated even when the cement mortar or the concrete spheres are cracked and contained in water or automobile exhaust gas. Even if the nitrite gas or sulfurous acid gas penetrates into the capillary pores of the cement mortar or the concrete sphere, calcium silicate hydrate is formed in the capillary pores of the cement material by the reaction between the alkali silicate and the cement component, so that the water leaks It is possible to prevent the penetration of harmful ions and to adsorb and decompose nitrite gas or sulphite gas in the air contaminated by automobile exhaust gas. High resolution natural To provide an environmentally friendly inorganic surfaces and floor finishes which can fully exert the function of light mineral aims.
In addition, the present invention can be constructed as a finishing material on the concrete surface during the construction civil engineering work using the inorganic natural minerals and alkali silicate-based material having excellent affinity with concrete, tiles, epoxy resin finishes, urethane resin finishes It can be stably installed on the surface of other resin mortar, etc., and it is cement and concrete according to the present invention when harmful ions penetrate into cement and concrete such as nitrous acid gas or sulfurous acid gas after hardening the environment-friendly inorganic surface and floor finish. Calcium silicate hydrates produced by alkali silicates in capillary pores are designed to fill capillary pores to enhance the prevention of harmful ion penetration, especially by applying micrometer-sized porous silica media and natural illite minerals. gas And dissociating sulfurous acid gas is a second object of the present invention.
The present invention to achieve the above object,
The total of one or more porous silica materials selected from the group consisting of activated silica, calcined at least 650 degrees Celsius for 30 minutes, or zeolites calcined at 750 degrees Celsius for more than 60 minutes, having a honeycomb porous structure. 60-80 parts by weight, evenly mixed 20-40 parts by weight of natural elite minerals of 90% by weight to 100 mesh sieve evenly in a powder form, and the ratio of the purified water in the ion distillation to 1: 1 ratio Stir for at least hour.
20-50 parts by weight of a composition containing porous silica and natural elite minerals, 10-30 parts by weight of calcium carbonate having a calcium oxide content of 52% by weight or more, 10-30 parts by weight of silica sand (250-325 mesh), 1 mole of alkali metal When the alkali silicate composition having a molar ratio of silica to 2.5 to 4.0 is 10-30 parts by weight, and additives such as a conventional antifoaming agent, a thickener, and a dispersant are added within 3 parts by weight with respect to 100 parts by weight of the composed composition, Can be achieved.
The present invention, as described above, is used for the surface of concrete floors and walls for the protection and finishing of buildings that enhance the durability of buildings by decomposing nitrous acid and sulfurous acid gas, decomposition of harmful ions, and other pollutant gases. Has the effect to be utilized.
Thus, the present invention, the environment-friendly inorganic surface and floor finish composition can be used for the removal of nitrous acid gas which is the main cause of environmental pollution in the air, and thus, in various buildings compared to the conventional polymer cement mortar for floor finishing It has the advantage that it can be effectively used as an environmentally friendly material.
1 is a view showing a nitrite gas removal performance test method for the composition of the present invention
2 is a chart showing the ultraviolet intensity and nitrite gas removal rate for the composition of the present invention
3 is a chart showing the nitrite gas supply concentration and removal rate for the composition of the present invention
Figure 4 is a chart showing the relative humidity and nitrous acid gas removal rate for the composition of the present invention
Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.
Natural elite minerals with good ion resolution are generally known ion resolution materials. Porous zeolites may also be known materials known as materials for adsorption of ions.
The decomposition reaction of the harmful gas required in the present invention requires a feature that the decomposition reaction should be started after the environmentally friendly inorganic surface and the bottom finish of the present invention adhere to and harden the surface of the sphere.
That is, in the early stage of use, the function of alkali silicate-based material should exert adhesion to the surface of the concrete spheres and fill the cement material voids, and after the formation of the finishing material for the attachment and densification of the pores, By decomposition reaction, the reaction which decomposes nitrous gas and sulphite gas in air | atmosphere should progress.
In the present invention, in the use of natural illite minerals for the decomposition of nitrite gas or sulfurous acid gas, and other harmful gases, porous materials and natural illite minerals in advance in order to exert the harmful gas decomposition function after curing the environmentally friendly inorganic surface and floor finishes. Mix evenly and evenly.
In other words, in order to uniformly disperse and mix the porous material and the natural elite mineral, the porous silica material and the natural elite mineral are first mixed and stirred with pure ion-purified water.
The porous silica material used herein is one or more porous silica materials selected from calcined diatomaceous earth activated by calcining diatomaceous earth at about 650 degrees Celsius for about 30 minutes or more than 60 minutes at 750 degrees Celsius and having a honeycomb porous structure. do.
In addition, the present invention utilizes the permeation performance of the alkali silicate composition having a molar ratio of silica to 1 mole of alkali metal in the range of 2.5 to 4.0 to the internal pores of the cement material and the reactivity with the cement material to allow the concrete sphere to be externally exposed from the capillary pores. It serves to block ions that cause serious damage to cement-based materials such as nitrite gas and sulfurous acid gas that penetrate.
Hereinafter, specific embodiments of the present invention will be described by way of example, and the scope of the present invention is not limited by the embodiments described below.
Example
In the embodiment of the present invention, when the blending amount of the environmentally friendly inorganic surface and bottom finish composition 1000kg, first calcined (medium combustion) for 30 minutes at 650 degrees Celsius 500 kg activated diatomaceous earth, calcined for 60 minutes at 750 degrees Celsius 300 kg of zeolite and 200 kg of natural elite mineral are mixed evenly in a zirconia ball mill for 60 minutes.
The mixed materials are mixed and prepared in a ratio of 1: 1 by weight with ion purified water.
Alkali silicate composition 300 with 320 kg of the composition, powder of 350% or more, 95% of calcium carbonate, 224 kg of calcium carbonate having a calcium oxide content of 52% by weight or more, 156 kg of silica sand (250-325 mesh), and a molar ratio of silica to 1 mole of alkali metal. A composition of the present invention is prepared by further mixing 8 kg of a conventional silicone antifoam, 13 kg of methyl cellulose thickener, and 9 kg of melamine-sulfonate formaldehyde condensate-based dispersant.
It shows the results of the physical properties of the environmentally friendly inorganic surface and floor finish composition of the present invention
The apparatus as shown in FIG. 1 is used to measure the NOx removal performance of the paving block after applying the composition of the present invention to the surface of the paving block. Mix NO gas and air, continuously add simulated polluted air with a concentration of 1 ppm into the reaction vessel at a rate of 1.5 l / min, and irradiate the specimen with ultraviolet light using black light. The NOx concentrations (NOx = NO + NO 2 ) at the inlet and outlet of the reaction vessel were measured with a chemiluminescent NOx automatic meter and the NOx removal rate was calculated.
Figure 2 shows the relationship between the ultraviolet intensity (UV-A wavelength 315 ~ 400nm) of the present invention and the NOx removal rate.
NOx was removed by irradiating ultraviolet rays of 0.1 mW / cm 2 or more.
On the other hand, NOx was hardly removed when the ultraviolet ray was not irradiated.
Therefore, it was found that NOx is removed by the decomposition reaction of the illite rather than simply adsorption, and the ultraviolet rays contained in the direct sunlight in summer are 3 to 4 mW / cm 2 .
The amount of ultraviolet rays on a cloudy day in winter is 0.1mW / cm 2 , showing the lowest annual intensity.
Therefore, it is thought that the NOx decomposition effect by illite can exert the removal effect all year round.
Figure 3 shows the relationship between the supply concentration of NO and the removal rate of the composition of the present invention. The removal rate was examined by changing the concentration of NO gas between 0.05 ppm and 5 ppm.
In the range of 0.05 ppm to 1 ppm, the removal rate is almost constant. At present, the NOx concentration of the polluted atmosphere is included in this range, so that the air purification is possible for environmentally low concentration pollution.
Since the relationship between the relative humidity and the NOx removal rate is shown in FIG. 4, NOx removal is possible at normal atmospheric humidity.
Claims (4)
20-50 parts by weight of the primary composition, 10-30 parts by weight of calcium carbonate having a calcium oxide content of 52% by weight or more, 10-30 parts by weight of silica sand (250-325 mesh), and a molar ratio of silica to 1 mole of alkali metal Eco-friendly inorganic surface and floor finish composition characterized in that the alkali silicate composition of 2.5 to 4.0 is composed of 10-30 parts by weight, and the antifoaming agent, thickener, and dispersant are added within 1 part by weight, respectively, based on 100 parts by weight of the composition.
As the porous silica material, the sum of one or more porous silica materials selected from activated diatomaceous earth calcined at 650 degrees Celsius for 30 minutes or more, or zeolite having a honeycomb porous structure by calcining for 60 minutes or more at 750 degrees Celsius is 60- 80-40 parts by weight, evenly mixed 20-40 parts by weight of a natural illite mineral having a size of more than 90% by weight in a 100 mesh sieve in a powder form, and then stirred at least 1 hour at a ratio of 1: 1 by weight ratio of purified ion water in an ion distiller. Environmentally friendly inorganic surface and floor finish composition characterized in that it has a function to remove nitrous acid gas in the atmosphere.
10-30 parts by weight of an alkali silicate composition having a molar ratio of silica to 2.5 moles of alkali metal is added to enhance adhesion performance of cement material and concrete sphere surface by penetration into cement material or concrete material voids. Eco-friendly inorganic surface and floor finish composition characterized in that.
10-30 parts by weight of an alkali silicate composition having a molar ratio of silica to 1 mole of alkali metal and a porous silica material is calcined for at least 30 minutes at 650 degrees Celsius or activated diatomaceous earth, or at least 750 degrees Celsius for 60 minutes. Eco-friendly inorganic surface and floor finish composition, characterized in that the total of one or more of the porous silica material selected from the zeolite having a honeycomb porous structure is 60-80 parts by weight of the floor finish is breathable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020100042383A KR101025331B1 (en) | 2010-05-06 | 2010-05-06 | A composite of eco-friendly inorganic materials for surface finishing of concrete floor and/or cementitious materials wall |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020100042383A KR101025331B1 (en) | 2010-05-06 | 2010-05-06 | A composite of eco-friendly inorganic materials for surface finishing of concrete floor and/or cementitious materials wall |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| KR101025331B1 true KR101025331B1 (en) | 2011-03-29 |
Family
ID=43939506
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1020100042383A KR101025331B1 (en) | 2010-05-06 | 2010-05-06 | A composite of eco-friendly inorganic materials for surface finishing of concrete floor and/or cementitious materials wall |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR101025331B1 (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030096754A (en) * | 2002-06-17 | 2003-12-31 | 김화복 | composition for construction structure finish member |
| KR20070092193A (en) * | 2007-08-24 | 2007-09-12 | 주식회사 세믹스 | A composite of polymer cement mortar for concrete surface finishing as eco-friendly materials |
| KR100880908B1 (en) * | 2008-11-27 | 2009-02-04 | 임원순 | Cement concrete composite and pavement method for concrete bridge using the same |
-
2010
- 2010-05-06 KR KR1020100042383A patent/KR101025331B1/en not_active IP Right Cessation
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030096754A (en) * | 2002-06-17 | 2003-12-31 | 김화복 | composition for construction structure finish member |
| KR20070092193A (en) * | 2007-08-24 | 2007-09-12 | 주식회사 세믹스 | A composite of polymer cement mortar for concrete surface finishing as eco-friendly materials |
| KR100880908B1 (en) * | 2008-11-27 | 2009-02-04 | 임원순 | Cement concrete composite and pavement method for concrete bridge using the same |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR20070092193A (en) | A composite of polymer cement mortar for concrete surface finishing as eco-friendly materials | |
| KR101724062B1 (en) | Mortar composition for inhibiting in-depth fine crack of damaged concrete structure and for repairing and reinforcing concrete structures, and method of repairing and reinforcing concrete structures using the same | |
| Ichikawa | Alkali–silica reaction, pessimum effects and pozzolanic effect | |
| KR101321730B1 (en) | Environmental-friendly shrinkage reducing agent and environmental-friendly plastering cement and mortar containing the same | |
| KR101366514B1 (en) | No-primer type paint composition for water-proof, erosion-proof, preventiing and flooring system and construction method using thereof | |
| KR101355392B1 (en) | Cement composite with improved acid proof and salt-resistance, mortar cement composite for repairing the concrete structure and repairing method of concrete structure using the mortar cement composite | |
| KR101831709B1 (en) | Lightweight repair agent composition for repairing the concrete structure and repairing method of the concrete structure therewith | |
| CA2777642C (en) | Use of a concrete-based element for treatment of gases and volatile compounds | |
| KR100797757B1 (en) | A composite of polymer cement mortar as a concrete surface finishing material and/or a concrete protection materials with water-proofing property and durability | |
| KR100883583B1 (en) | Antibacterial mortar using natural ceramic mineral | |
| CN104529330B (en) | A kind of environment-friendly fireproof dry powder for inner wall mortar | |
| KR102365874B1 (en) | Anti-corrosion and lightweight polymer mortar components for repair of deteriorated concrete structures | |
| KR102251021B1 (en) | Crack-reducing Polymer Mortar Composition for Repair Section | |
| CN101580356B (en) | Water-emulsion organic silicon waterproof agent | |
| JP5751499B2 (en) | Reaction accelerator and concrete reinforcement method used in silicate surface impregnation method | |
| KR102232477B1 (en) | Mortar composition with excellent wet curable properties and method of repairing concrete structure using the same | |
| KR20060102384A (en) | Silicone resin emulsion membrane and manufacturing method having infiltration, hydrophobicity and penetration | |
| KR102230844B1 (en) | A Crack Repair Complex waterproofing Method Of architectural structures | |
| JP2013107284A (en) | Cured body and method for producing the same | |
| KR20060014452A (en) | A composite of cement mortar with water proofing properties using copolymers and activated silica minerals | |
| KR101025331B1 (en) | A composite of eco-friendly inorganic materials for surface finishing of concrete floor and/or cementitious materials wall | |
| KR100624964B1 (en) | Coating composition for antibiosis underground water tank using liquid type nano silver | |
| KR100869719B1 (en) | Method for constructing impervious wall of waste landfill pond using soil stabilizing agent | |
| KR102260367B1 (en) | Silica based waterproof agent using terpolymer redispersible powder and surface protection agent using silane and method for waterproof and anticorrosion using the same | |
| KR20090100885A (en) | Liquid concrete-waterproof admixture |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A201 | Request for examination | ||
| A302 | Request for accelerated examination | ||
| E902 | Notification of reason for refusal | ||
| AMND | Amendment | ||
| E601 | Decision to refuse application | ||
| AMND | Amendment | ||
| X701 | Decision to grant (after re-examination) | ||
| N231 | Notification of change of applicant | ||
| GRNT | Written decision to grant | ||
| FPAY | Annual fee payment |
Payment date: 20140107 Year of fee payment: 4 |
|
| FPAY | Annual fee payment |
Payment date: 20150304 Year of fee payment: 5 |
|
| LAPS | Lapse due to unpaid annual fee |