KR100797757B1 - A composite of polymer cement mortar as a concrete surface finishing material and/or a concrete protection materials with water-proofing property and durability - Google Patents

Abstract

The present invention relates to a polymer cement mortar for concrete sphere protection and surface finishing of waterproof and durable, 30-50 parts by weight of cement, 30-50 parts by weight of silica sand (150-250 mesh), 2-5 parts by weight of stearic acid salt Styrene-acrylic polymer emulsion and ethylene having improved swelling properties with respect to 100 parts by weight of a composition comprising 40-60 parts by weight of a powder additive containing blast furnace slag and sodium carbonate in a ratio of 3-8: 0.5-3 by weight. 20-30 parts by weight of a polymer emulsion in which a vinyl vasate emulsion is mixed at a ratio of 0.5-2.0: 2.0-5.0, and an additive such as a conventional antifoaming agent, a thickener, and a dispersing agent are added within 3 parts by weight,

The polymer cement mortar of the present invention is used on the surface of the concrete sphere, unlike the conventional finish material that was cracked together with the finish applied to the concrete surface along the crack generated in the concrete surface finish by the excellent elasticity and elasticity After the crack does not occur, the swelling characteristics in the pores of the concrete sphere has an excellent waterproof finish and durability enhancement effect to block the penetration of water or oil components.

Surface finish, crack protection, durable, waterproof, swellable, concrete protection

Description

A composite of polymer cement mortar as a concrete surface finishing material and / or a concrete protection materials with water-proofing property and durability

1 is a capillary pore penetration prevention function of polymer cement mortar

2 is an analysis of the production of fine calcium carbonate crystals for the present invention

3 shows the difference in gasoline infiltration behavior

Figure 4 is the subject of the present invention for waterproofing, protecting and finishing concrete (floor)

5 is the application of the waterproofing, protecting and finishing concrete of the present invention (wall)

The present invention relates to a two-component polymer cement mortar composition in a re-modeling method for initial construction and repair reinforcement, and more particularly, to a polymer cement mortar composition that can be used in waterproofing and cement materials. Relates to a polymer cement mortar composition having a sphere's protective function against cracks occurring in concrete spheres.

The present invention provides adhesion and waterproofing function by forming a coating film, which is a general characteristic of polymer emulsion, in the cement mortar, and harmful ions, water, and other oil components (petrol, automobile oil, etc.) harmful to cement and concrete materials from the outside. Swelling during penetration, it blocks the penetration of these harmful substances into the pores of cement mortar or concrete, and uses the strength characteristics of cement mortar in combination to provide excellent adhesion strength and to protect cracks in spheres. The present invention relates to a polymer cement mortar composition having excellent durability and easy construction by strengthening waterproof and water permeability.

Concrete hardly cracks during the hardening process, which facilitates the penetration of water or various salts harmful to concrete, such as nitrites and sulfites in the air, and harmful salts or water that have penetrated into the concrete. As the concrete is neutralized, the building deteriorates quickly. In addition, plaster tiles for interior and exterior of buildings are often dropped due to deterioration due to the neutralization of concrete, and even if not dropped, they are present in severe contamination.

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 composites 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 being used as re-modeling materials for buildings, and some of them have already been applied to such re-modeling methods from new buildings.

Generally, polymer cement mortar is a material used by mixing cement and various polymer emulsions, and its use is used as a waterproof material, a surface finishing material, and other special cement mortars. Among them, polymer cement mortar as the most commonly used waterproofing material is widely used from general buildings to civil structures due to the ease of use and the like, and is a material in which many technologies have been developed.

In the related art and patent, 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.

Korean Patent Laid-Open No. 2000-17879 discloses a waterproofing agent consisting of 57% cement, 7% silica sand, ethylene vinyl acetate, 1% activated silica, and 34% water.

In addition, Korean Patent Laid-Open Publication No. 2002-31684 discloses a mixture of an agent A composed of an emulsion-dispersed calcium stearate and an acrylic emulsion water copolymer, and a agent B composed of back cement, silica sand, polyoxyethylene lauryl ether, etc. in a 1: 0.25 weight ratio. A waterproofing agent consisting of steps 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 waterproof performance can be used in a variety of indoor and basement, such as buildings. However, all of these conventional techniques are materials composed mainly of cement, and when a crack occurs due to dry shrinkage of a cement material, water leaks through the cracks, which causes the inherent waterproof performance.

Polymer cement mortar is a material that has a complex function of organic and inorganic materials and replaces other finishing materials with various methods and finishes. However, 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 the leakage of water and the penetration of harmful ions, but in countries where the four seasons are obvious, the long-term durability problem appears due to the deterioration of waterproofing performance due to repeated heating and cooling and the lack of penetration resistance of harmful ions. have.

As for the polymer mortar composite, in Korean Patent Laid-Open Publication No. 2000-0000485, in the production of polymer mortar, an unsaturated polyester mortar resin is used as a binder and placed in a mold mold to cure at 20 ° C., which is caused by using 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 installing a removable diaphragm at the center in the manufacture of a polymer mortar and a cement mortar composite and then removing the diaphragm before the mortar is cured. 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. It should be excellent in affinity with, ie, adhesion. 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 to the tiles, even when the construction finish with epoxy resin, urethane resin, etc., there is also a problem of partial reinforcement.

In addition, Patent No. 10-0519838-0000, filed by the inventor of the present invention and other co-inventors, uses a polymer cement mortar for repair and finishing materials in buildings using cement-based materials and re-emulsified dispersion polymers in manufacturing polymer cement mortars. Although there is no mention of cracks that may occur after the use of these materials, there is no problem in preventing leakage or infiltration of harmful ions due to the occurrence of cracks.

In addition, in Korea Patent Publication No. 10-2005-0055654, which was originally filed by the inventor of the present invention but changed to another inventor, the polymer cement mortar is functionally self-healing when cement or concrete cracks are mixed with cement mortar and concrete. 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.

Therefore, the present invention is devised to solve the problems of the prior art, it is constructed on top of the sphere, excellent stretch ratio function that can protect the crack of the sphere occurs even if the crack occurs in the cement mortar or concrete sphere Even if petroleum compounds such as water, harmful ions, gasoline, or automobile oil penetrate into the capillary pores of the cement mortar or the polymer cement mortar installed on the concrete sphere, the polymer component swells into the capillary pores of the polymer cement mortar. It has developed a polymer cement mortar that can prevent water leakage and penetration of harmful ions.

The present invention can be used as a finishing material on the concrete surface during the construction civil engineering, with a polymer emulsion and cement having excellent affinity with concrete, and the tiles, epoxy resin finish, urethane resin finish, other resin mortar, etc. The polymer cement according to the present invention can be stably installed on the surface of the polymer cement mortar after the polymer cement mortar is cured, and harmful ions penetrate into the concrete such as water, gasoline, oil, petroleum compounds such as carbon dioxide or sulfur dioxide, and concrete. The capillary pores inside the mortar are filled with capillary pores due to the swelling of the polymer, thereby enhancing the waterproof performance and preventing the penetration of harmful salts.

Therefore, the present invention can be utilized for waterproofing, protection and finishing with the aim of increasing the durability of concrete floors and walls.

Therefore, the present invention has been made to solve the problems of the prior art as described above, the object of the present invention is to provide a waterproof performance around the known waterproofing agent components that can be used for cement-based materials, and at the same time, cement mortar or concrete Constructed on the top of the sphere for the surface finish of the sphere, the expansion function to protect the surface of the sphere regardless of crack width or size even if cracks in the sphere, petroleum compounds such as water, gasoline, oil, etc. The present invention provides a polymer cement mortar that continuously maintains waterproof performance and durability by imparting a corrosion resistance to prevent infiltration of carbon dioxide or sulfurous acid gas, which is contained in a large amount and degrades cement-based materials.

The present invention for achieving the above object is 10-30 parts by weight of cement, 30-50 parts by weight of silica sand (60-100 mesh), 30-60 parts by weight of blast furnace chain slag, 5-10 weight of sodium carbonate blast furnace chain slag weight ratio The resin composition in which the styrene-acrylate polymer emulsion, which is modified and exhibits swelling characteristics and the styrene-acrylic ester polymer emulsion, which has excellent elasticity and flexibility, is mixed in a weight ratio of 2-5: 3-6 in a weight ratio of cement and blast furnace slag. Conventional antifoam, thickener, and dispersant based on 100 parts by weight of the composition consisting of 30-60 parts by weight of the mixture, 4-10 parts by weight of selected calcium carbonate having 325 mesh 95% or more and 4-8 parts by weight of stearic acid salt. It is characterized in that an additive such as added within 3 parts by weight.

Hereinafter, the present invention will be described in detail.

In addition to cement and silica sand, stearic acid salts are well-known materials commonly used as ordinary waterproofing materials, and blast furnace slag is widely used as a material for cement replacement. In addition to these conventionally known combinations of waterproof materials, the present invention employs styrene-acrylate polymer emulsions and styrene-acrylic ester polymer emulsions which are modified with sodium carbonate to exhibit swelling properties.

In the present invention, up to 10 micrometers of calcium carbonate crystals produced in the capillary pores of the sphere by the reaction of the blast furnace slag and sodium carbonate, and inside the capillary pores by the styrene-acrylate polymer emulsion and the styrene-acrylic ester polymer emulsion It is used as a material to prevent cracking and penetration of water, oil and harmful ions by the formation of swellable polymers and elastic films.

Blast furnace slag is generally used in concrete as a cement replacement material, for example, to reduce the heat of hydration. Blast chain slag is therefore known as a latent hydraulic material that does not harden on its own but exhibits a hydrocuring reaction due to external stimuli. Strong alkali materials are used as external stimulants. However, when carbonate is used as a strong alkali stimulant of blast furnace slag, fine calcium carbonate crystals of less than 10 microns are produced.

Powder X-ray diffraction analysis results for the hydrate produced when sodium sulfate and sodium carbonate were added to the blast furnace chain slag weight as strong alkalis to the blast furnace slag were shown in FIG. 1. Symbol SSC represents the mixture of sodium sulfate and sodium carbonate in an equivalent ratio of sodium oxide in a 1: 1 ratio, SC means sodium carbonate, SS means sodium sulfate, the number before the symbol is the addition amount (%), and the number after the symbol is the curing age (day). It means. As shown in the analysis results, it can be seen that as the amount of added sodium carbonate increases, the peak of the produced calcium carbonate appears. At this time, the size of the calcium carbonate crystals formed is 10 micrometers or less, which is formed in the capillary pores of the sphere, and prevents the penetration of water or harmful ions into the capillary.

In the present invention, by utilizing the swelling performance and elasticity of the styrene-acrylate polymer emulsion and the styrene-acrylic ester polymer emulsion, petroleum compounds such as water, gasoline, oil, and the like penetrating from the capillary pores of the sphere, carbon dioxide or sulfurous acid gas It serves to block the ions that cause serious harm to cement-based materials such as. A picture of the swelling characteristics is shown in FIG. 2.

After the cement is hardened, the water penetrates through the cracks of the hardened cement or through the capillary pores present in the hardened cement, which causes the hardened cement to leak.

However, the polymer cement mortar according to the present invention prevents the penetration of water, oil, harmful ions, etc., which penetrates through cracks or capillary pores of the sphere by calcium carbonate crystals and swellable polymers formed inside cement or concrete spheres, and is waterproof. It will give a function.

Therefore, the effect of enhancing the durability of the concrete structure used in construction or civil engineering or protection of the surface finishing layer is excellent, and the application targets for waterproofing, protecting and finishing the concrete are shown in FIGS. 4 and 5.

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 1

In Example 1, when the compounding quantity of 1000 kg of polymer cement mortars is mix | blended, 100 kg of cement. 316 kg of silica sand with a powder content of 80% or more and 95% or more and 90% or more silica, 300 kg of blast furnace slag, 20 kg of sodium carbonate, a styrene-acrylate polymer emulsion and a styrene-acrylic ester polymer emulsion in a weight ratio of 2-5: 120 kg of resin composition mixed in the ratio of 3-6, 80 kg of calcium carbonate, 40 kg of stearic acid salt, 8 kg of normal silicone antifoaming agent, 8 kg of methyl cellulose thickener, melamine-sulfonate formaldehyde condensate system The invention is prepared by mixing 8 kg of dispersant.

The polymer cement mortar of the present invention and commercially available products (polymer cement mortar for floor finishing) were applied to concrete specimens with a thickness of 30 mm, and then physical properties were compared. The results of comparing the physical properties are shown in Table 1 below.

Table 1

In addition, after the coarse aggregate was mixed with the polymer cement mortar of the present invention, the result of testing the penetration performance of gasoline is shown in FIG. 3. It was confirmed visually that the gasoline did not penetrate the sphere even after the age of age.

As confirmed in the above embodiment, the polymer cement mortar composition according to the present invention can be effectively used in various buildings by exhibiting more than the equivalent level of waterproofness (absorption rate) compared to the polymer cement mortar for waterproofing or floor finishing.

Claims (6)

Usually 10-30 parts by weight of Portland cement, 30-50 parts by weight of silica sand (60-100 mesh), blast furnace slag 30-60 parts by weight, sodium carbonate 5-10 parts by weight of blast furnace slag weight ratio, modified to swell characteristics The resin composition in which the styrene-acrylate polymer emulsion and the styrene-acrylic ester polymer emulsion having excellent elasticity and flexibility were mixed in a weight ratio of 2-5: 3-6 in a weight ratio of 30-60 weight of the cement and blast furnace slag mixture weight ratio. 1 part by weight of a conventional antifoaming agent, 1 part by weight of thickener, and a dispersant based on 100 parts by weight of a composition consisting of 4-10 parts by weight of selected calcium carbonate having 95% or more of 325 mesh and 4-8 parts by weight of stearic acid salt. Polymer cement mortar composition, characterized in that 1 part by weight is added. delete delete The method of claim 1, A polymer cement mortar composition having the properties of claim 1 for use in waterproofing, protecting and finishing concrete structures. The method of claim 4, wherein Waterproofing of concrete structures that can be used as a substitute for the waterproof layer of concrete for the underground parking lot of apartment buildings, the bare concrete layer for protecting the waterproofing layer, the wire mesh layer for reducing cracks of the bare concrete, and the epoxy coating layer for surface finishing, Polymer cement mortar composition having properties of protection and finishing. The method of claim 4, wherein Polymer cement mortar composition having the properties of waterproofing, protecting and finishing of concrete structures that can be used as a substitute for liquid waterproofing and plastering mortars used for concrete walls in general buildings.

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