KR20130110847A - Polymer modified concrete compostion and bridge pavement method using the same - Google Patents
Polymer modified concrete compostion and bridge pavement method using the same Download PDFInfo
- Publication number
- KR20130110847A KR20130110847A KR20120033124A KR20120033124A KR20130110847A KR 20130110847 A KR20130110847 A KR 20130110847A KR 20120033124 A KR20120033124 A KR 20120033124A KR 20120033124 A KR20120033124 A KR 20120033124A KR 20130110847 A KR20130110847 A KR 20130110847A
- Authority
- KR
- South Korea
- Prior art keywords
- polymer
- concrete
- modified concrete
- concrete composition
- cement
- 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
- C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
- C04B22/06—Oxides, Hydroxides
- C04B22/062—Oxides, Hydroxides of the alkali or alkaline-earth metals
- C04B22/064—Oxides, Hydroxides of the alkali or alkaline-earth metals of the alkaline-earth metals
-
- 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
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/24—Macromolecular compounds
-
- 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
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/24—Macromolecular compounds
- C04B24/28—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C04B24/282—Polyurethanes; Polyisocyanates
-
- 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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/06—Combustion residues, e.g. purification products of smoke, fumes or exhaust gases
- C04B18/08—Flue dust, i.e. fly ash
-
- 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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/14—Waste materials; Refuse from metallurgical processes
- C04B18/141—Slags
-
- 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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/14—Waste materials; Refuse from metallurgical processes
- C04B18/146—Silica fume
-
- 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
- C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
- C04B22/08—Acids or salts thereof
- C04B22/14—Acids or salts thereof containing sulfur in the anion, e.g. sulfides
- C04B22/142—Sulfates
- C04B22/143—Calcium-sulfate
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C7/00—Coherent pavings made in situ
- E01C7/08—Coherent pavings made in situ made of road-metal and binders
- E01C7/085—Aggregate or filler materials therefor; Coloured reflecting or luminescent additives therefor
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
Abstract
The present invention relates to a bridge pavement method using polymer modified concrete and a polymer modified concrete composition used in the method.
The polymer-modified concrete composition for cross-linking paving according to the present invention is a polymer-modified concrete composition usable for paving the cross-section, and is made by mixing cement, aggregate, polymer emulsion and water, and the polymer emulsion has a polycarboxylic acid system for preventing cement aggregation. At least one of a surfactant or a water-dispersed urethane-based surfactant for preventing cement aggregation and a nonionic surfactant for preventing cement aggregation is added, and the polymer emulsion includes a cement hydration retardant, and the polymer emulsion includes at least one of latex or acrylic. It is characterized by including one.
Description
BACKGROUND OF THE
In general, a bridge is a general term for an expensive structure that allows a vehicle to pass through an upper part of a river, a coast, a road, and the like. A vehicle is smoothly formed by forming a pavement layer on the surface of the bridge through pavement work. To let them pass.
The cross-linked pavement layer is a part that receives the traffic load directly, and it is required to have strength and crack resistance suitable for repeated traffic loads, and to have waterproof performance due to being exposed to moisture such as rainwater. It is required to have low chlorine ion permeability to prevent corrosion of the reinforcing bars by penetration.
As such a pavement paving method, a conventional concrete paving method or ascon paving method has been widely used. However, the concrete paving method is easily cracked and resistant to salt damage, and the asphalt concrete paving method has a problem of periodically repacking due to plastic deformation and surface degradation.
In order to solve this problem, a latex modified concrete bridge pavement method using synthetic rubber latex has been developed and utilized in Korea. This technology has the advantage of improving the flexural toughness and adhesion strength of concrete and preventing the diffusion of chlorine ions by dispersing the solids of synthetic rubber latex (SBR) evenly in the concrete to form a polymer coating.
However, latex modified concrete is limited in that it requires the use of special dedicated construction equipment such as mobile mixers. That is, since the working time of the latex modified concrete is very short, about 20 minutes, since it can not be mixed and transported in the ready-mixed concrete plant like general ready-mixed concrete, it is being constructed using a mobile mixer so that it can be directly compounded and poured in the field.
However, many problems arise when using a mobile mixer to blend latex modified concrete as described above.
First of all, the mixing speed is very slow. Since the mobile mixer can mix only 7 m 3 of concrete per hour, there is a problem that the area that can be constructed per hour is very small.
In addition, when using a mobile mixer, since raw materials such as cement and aggregate are stored in close proximity to the site, it may be difficult to secure a suitable place in a crowded downtown area. It is difficult to control the slump, so quality control is not easy.
In addition, in case of mobile mixer, only one type of cement can be used due to the limitation of equipment configuration, and it is not possible to add various mixed materials such as blast furnace slag powder and silica fume, so it is difficult to improve the salt resistance, strength and chemical resistance of concrete. have. Similarly, in aggregate, aggregates having various particle sizes cannot be used, and only one type of aggregates must be used, so there is a problem in that the improvement of physical properties and quality control of concrete are not easy.
The present invention is to solve the above problems, it is possible to mass production by using a ready-mixed concrete plant or a field batch plant to improve the construction speed, improved physical properties, such as salt resistance, and polymer modification that can be guaranteed a certain quality It is an object of the present invention to provide a concrete composition and cross-linking method using the same.
Bridge construction method according to the present invention for achieving the above object, the step of cleaning the surface of the bridge to be paved, the polymer-modified concrete composition to be packed in the ready-mixed concrete factory or field batching plant using a ready-mixed concrete vehicle Conveying to the bridge, casting the polymer modified concrete to the surface of the bridge, and curing the polymer modified concrete composition, wherein the polymer modified concrete composition comprises cement, aggregate, polymer emulsion and The polymer emulsion is formed by mixing water, and at least one of a polycarboxylic acid-based surfactant for preventing cement aggregation or a water-dispersed urethane-based surfactant for preventing cement aggregation, and a nonionic surfactant for preventing cement aggregation are added, and the polymer emulsion is cement. Hydration delay And also, the polymer emulsion is characterized in comprising at least one of a latex or acrylic.
According to the invention, it is preferred that at least one of fine slag powder, fly ash, silica fume or metakaolin is further mixed.
In addition, according to the present invention, it is preferable that the powder type expansion agent is further mixed to compensate for shrinkage of the concrete. The expanding agent is preferably made of a mixture of CSA (Calcium Sulfoaluminate) and gypsum.
And, the CSA is 0.1 to 10% by weight, the gypsum may be mixed in the ratio of the range of 1 to 10% by weight.
In addition, according to the present invention, it is preferable that the shrinkage reducing agent of the liquid is further mixed to reduce the shrinkage of the concrete. The shrinkage reducing agent is preferably at least one of polyoxyethylene alkylaryl ether, polyoxyethylene oxypropylene block copolymer, polyoxyalkylene glycol, alkyl or cycloalkyl polyoxyalkylene.
And the shrinkage reducing agent may be mixed in the range of 0.1 to 3.0% by weight with respect to the cement and may be used in the form of admixture in the polymer concrete manufacturing site or may be used in advance mixed in the polymer emulsion.
On the other hand, according to an embodiment of the present invention, the polycarboxylic acid-based surfactant, a copolymer of polyethylene glycol mono (meth) allyl ether and maleic anhydride, len glycol mono (meth) allyl ether and (meth) acrylic acid copolymer, At least one or two or more of polyalkylene glycol mono (meth) acrylic acid ester and (meth) acrylic acid copolymer, a methacrylic acid ester having a sulfonic acid group, a (meth) acrylic acid copolymer, and a polyglycerol (meth) acrylic acid ester copolymer It is mixed and added at a ratio of 0.1 to 10% by weight of the total polymer emulsion.
In addition, the water-dispersed urethane-based surfactant contains a modified water-dispersed polyurethane copolymer, and is added at a ratio of 0.1 to 5% by weight in the entire polymer emulsion.
In one embodiment of the present invention, the nonionic surfactant, fatty acid diethanolamine compound, amine oxide, nonylphenol ethylene oxide adduct, sorbitan esterified compound, alkyl polyglycoside, fatty acid ethylene oxide adduct, polyethylene Oxide, polypropylene oxide, polyethylene polypropylene copolymer, higher fatty acid (C12 to C22) diethanolamine compound, higher fatty acid (C12 to C22) ethylene oxide (EO) adduct (1 to 50 EO), alkyl (C4) Amine oxides, alkyl (C4 to C20) phenol ethylene oxide adducts (1 to 50 EO), sorbitan esterified compounds and ethylene oxide adducts (1 to 50 EO), alkyl (C1 to C20) Polyclicoside (molecular weight: 100 to 100,000), higher alcohol (C4 to C20) ethylene oxide adducts (1 to 50 EO), polyethylene oxide (molecular weight: 100 to 100,000), polypropylene oxide (molecular weight: 100 to 100,000) , Polyethylene oxide and polypropylene The at least one or more than one side of the mixed copolymer (molecular weight of 100 ~ 100,000), polyethyleneimine (molecular weight of 100 ~ 100,000), polyglycerol (molecular weight of 100 ~ 100,000). In addition, the nonionic surfactant is added at a ratio of 0.1 to 10% by weight of the entire polymer emulsion.
In addition, the polymer emulsion may include a cement hydration delay agent, the cement hydration delay agent is at least any one or two or more of citric acid, tartaric acid, glucoic acid, glucose, oligosaccharides, sorbitol and molasses are mixed, Cement hydration retardant is added at a ratio of 0.1 to 5% by weight of the entire polymer emulsion.
The polymer-modified concrete according to the present invention was able to maintain the fluidity for a certain time after mixing the concrete to produce concrete in the ready-mixed concrete plant or field layout plant to be transported to the bridge to perform bridge pavement. If concrete is manufactured in ready-mixed concrete plants or plants, mass production is possible quickly, and there is an advantage in that construction speed can be improved when the concrete manufactured at the factory is cross-linked.
In addition, when the concrete is manufactured in a factory, as in one embodiment of the present invention, at least one of blast furnace slag powder, silica fume, fly ash, metakaolin or various mixed materials and admixtures thereof may be added to the bridge packaging, The properties of the concrete can be improved to suit.
In addition, when concrete is manufactured in a factory, as in one embodiment of the present invention, various expanding agents, in particular, calcium sulfoaluminate, gypsum, or the like, may be added to at least one or a mixture of these, thereby reducing shrinkage of concrete. The advantage is that you can.
And manufacturing concrete at the factory has the advantage that the quality of the water can be kept constant because the water content of the aggregate can be kept constant.
1 and 2 is a table showing the mixing ratio of the sample for testing the physical properties of the polymer modified concrete composition (cement form except aggregate) according to the present invention.
3 is a graph showing a flow test result over time of the polymer-modified concrete samples shown in FIGS. 1 and 2.
Figure 4 is a graph showing an embodiment of the form of adding various admixtures to the polymer-modified concrete (in aggregate-containing concrete form) according to the present invention.
5 is a table showing the test results for the physical performance and durability of the polymer-modified concrete shown in FIG.
Hereinafter, with reference to the accompanying drawings, it will be described in more detail with respect to the polymer-modified concrete composition and the bridge construction method using the same according to an embodiment of the present invention.
The bridge pavement method according to an embodiment of the present invention is completed by cleaning the surface of the bridge to be paved, installing polymer-modified concrete on the surface of the bridge, and curing the concrete.
In more detail, first, in order to pave the bridge using the concrete for paving pavement, a surface cleaning operation to remove contaminants attached to the surface of the bridge and aggregate exposed on the surface must be performed. Such surface cleaning is generally performed within 48 hours before concrete is poured. In addition, before the concrete is poured, the surface of the bridge is moistened with water, and the surface is dried to prevent the water from being absorbed by the existing concrete.
As above, when the bridge preparation preparation work is completed, the bridge concrete is laid. When concrete is laid in this way, the work is leveled using a vibrator, etc., and the surface finishing work is performed by an electric finisher or by hand. In this case, texturing may be performed on the surface where the concrete is poured by using Astroturf drag.
Finally, after the coating curing agent is sprayed on the upper surface of the concrete pour surface and covered with polyethylene film to cure for a predetermined period of time, the bridge is finished using the concrete composition for bridge construction.
Bridge construction methods leading to bridge cleaning, concrete laying and curing as described above are of known construction, and an important feature of the present invention lies in the polymer modified concrete composition which is laid on the surface of the bridge. In other words, the cross-section paving method according to the present invention is to cover the method of paving the cross-section using the polymer modified concrete composition according to the present invention described below.
The polymer cut concrete composition according to the present invention will be described.
As described in the prior art, when the bridge is paved using the existing latex modified concrete composition, the latex modified concrete is hardened in a very fast time (about 30 minutes) after compounding. In the bridge site, it was blended using a mobile mixer. As a result, the construction speed decreased, the concrete properties were limited, and the concrete quality management was difficult.
In the present invention, to solve this problem, it was possible to manufacture concrete in the ready-mixed concrete plant or field deployment plant. If the concrete is manufactured in ready-mixed concrete factory or plant, mass production can be done in a short time. Therefore, the construction speed can be improved and strict quality control is possible when the concrete manufactured in the factory is cross-linked.
In addition, when the concrete is manufactured in the factory, as in one embodiment of the present invention, various admixtures such as blast furnace slag powder, silica fume, fly ash, metakaolin can be added to the admixture, so that the physical properties of the concrete to be suitable for bridge packaging Can be improved.
And manufacturing concrete at the factory has the advantage that the quality of the water can be kept constant because the water content of the aggregate can be kept constant.
In other words, the manufacture of cross-linked pavement concrete in ready-mixed concrete factory or plant has a variety of advantages compared to manufacturing in a mobile mixer.
However, as described above, in the case of the conventional cross-linked latex-modified concrete, concrete was hardened within a short time of about 30 minutes after the concrete was blended, and thus it could not be transported from the factory to the bridge.
Accordingly, the present invention has developed a polymer-modified concrete that maintains fluidity within a certain time so that the bridge paving concrete is transported from the factory to the bridge site and the working time including the site waiting time.
Polymer modified concrete according to the present invention is generally made by mixing water with cement, sand, and gravel, which are materials constituting concrete. Then, the polymer emulsion of the composition proposed in the present invention is mixed so that fluidity can be ensured during the working time after mixing the concrete.
Portland cement (OPC) is usually used, but in order to improve the properties of concrete, blast furnace slag cement, pozzolane cement, high flow cement, low heat cement, multi-component mixed cement, flame resistant cement, expandable cement, (super) crude steel cement Various special cements such as cemented carbide, ultrafine cement, and fine powder cement may be used.
In particular, in one embodiment of the present invention, in order to improve the physical properties of the cement, at least one of a fine slag powder, silica fume, fly ash and metakaolin or a mixed material thereof is added.
Slag fine powder is produced as a by-product of the steel industry, and not only greatly improves the salt resistance and chemical resistance of the cement, but also has the advantage of improving the long-term strength of the cement. That is, (blast furnace) slag is Ca 2 + in the hydration process, Mg 2 +, AlO 4 4 -, SiO 4 4- to generate ions, which react with the cement calcium silicate hydrate (CSH), calcium aluminate (CAH10 ) Hydration reduces the alkali amount of cement and densifies the internal structure of cement after hardening, thereby improving the strength of the system and adsorbing Cl - ions from snow removal materials and blocking the inflow of Ca 2 + ions. do. Slag fine powder may be mixed in a range of about 20 to 50 parts by weight, based on 100 parts by weight of ordinary portland cement.
In addition, fly ash collects fine particles in coal ash produced by burning coal in a coal-fired power plant using a dust collector. Fly ash is an artificial pozzolanic material, which itself is not hydrophobic, but silica material reacts slowly at room temperature by lime and water to produce a stable insoluble compound.
The components of SiO 2 , Al 2 O 3 in the fly ash absorb the alkaline components of cement through the pozzolanic reaction with the cement hydrate, densifying the internal structure of the hardened body, and Al 2 O 3 The component adsorbs Cl − ions from the snow remover and blocks the ingress of Ca 2 + ions. In other words, by fixing the pores in the cement paste by fixing the calcium hydroxide or alkali hydroxide mixture which is precipitated with the infiltration water while remaining in the pore structure in the cement paste as a hydrated living organism inside the cement structure, the permeability of the concrete is improved, and By suppressing the permeability to the concrete contributes significantly to the increase of strength and durability of the concrete. The fly ash may be mixed in the range of approximately 10-40% by weight throughout the cement composition.
Silica fume collects ultrafine silicon by-products generated during silicon production by an electrostatic precipitator. When silica fume is mixed into cement, the voids between the cement particles can be filled to form high strength and high durability hardened concrete.
That is, silica fume mainly contains more than 80% of amorphous silica, and is composed of very fine and spherical particles (average particle size: 0.1㎛), which causes pozzolanic reaction very effectively, which has a positive effect on the long-term strength increase of concrete. . Particularly, the particle size of the silica fume is small enough to form a specific surface area of 150,000 to 250,000
And metakaolin serves to fill the pores between the cement particles and fine aggregate so that the hardened concrete of the concrete has a dense structure. In the short term, metakaolin increases the initial strength of concrete by producing ethrinzite and activating C 3 S in cement. In the medium and long term, metakaolin improves compressive strength and durability by pozzolanic reaction of cement with calcium hydroxide.
High-strength mixtures such as silica fume and metakaolin may additionally use about 1-10% by weight of the total cement composition (except aggregate).
On the other hand, in one embodiment of the present invention, a powder type expansion material mixed with calcium sulfoaluminate (CSA, Calcium Sulfoaluminate) and gypsum is used.
Calcium sulfoaluminate is a compound of 3CaO · 3Al 2 O 3 · CaSO 4 , which enhances premature strength and causes expansion of cement by forming ethrinzite through hydration with water. In one embodiment of the present invention calcium sulfoaluminate may be mixed in the range of 0.1 to 10% by weight of the total cement composition (excluding aggregate).
Gypsum is a concept including gypsum, anhydrous gypsum and the like in the present invention. Gypsum increases SO 3 elution when mixed with water to promote the reaction of blast furnace slag powder, and reacts with calcium aluminate in cement hydrate to produce ethrinzite, densifying the internal structure, and MgO component in the long term Offset shrinkage to prevent cracking due to shrinkage and increase durability. In order to make this reaction occur smoothly, it is preferable to use anhydrous gypsum with a powder of 3,000 cm 2 / g or more.
And in one embodiment of the present invention gypsum may be mixed in the range of 1 to 10% by weight of the total cement composition (except aggregate).
In addition, according to the present invention, it is preferable that the shrinkage reducing agent of the liquid is further mixed to reduce the shrinkage of the concrete. The shrinkage reducing agent is preferably at least one of polyoxyethylene alkylaryl ether, polyoxyethylene oxypropylene block copolymer, polyoxyalkylene glycol, alkyl or cycloalkyl polyoxyalkylene.
And the shrinkage reducing agent may be mixed in the range of 0.1 to 3.0% by weight with respect to the cement and may be used in the form of admixture in the polymer concrete manufacturing site or may be used in advance mixed in the polymer emulsion.
On the other hand, in order to prevent the slump-loss of cement which is not hardened by the high concrete temperature in the summer, and to secure the working time necessary for transporting, waiting and placing concrete, the condensation retardant is 0.1 to 100% by weight of the mixed composition. ~ 1.0% by weight can be used.
Such a coagulation delay agent is used alone or in combination of two or more of tartaric acid, citric acid, sodium gluconate, sugar (Sugar) and the like.
In addition, the cement as described above can be used in the form of a finished product, instead of using a pozzolanic material, a latent hydraulic material, an expanding material, a fast hardening material, a fastening material, and other mineral mixtures and organic admixtures as a separate additive to the general Portland cement. It may also be prepared. Gravel and sand are used as aggregate.
The polymer emulsion used in the polymer modified concrete composition according to the present invention is to make a polymer such as latex or acrylic into an emulsion. At least one of a polycarboxylic acid-based surfactant for preventing cement aggregation or a water-dispersed urethane-based surfactant for preventing cement aggregation is added to the polymer emulsion. And nonionic surfactants for preventing cement agglomeration. In addition, cement hydration retardant is mixed.
Polycarboxylic acid-based surfactants for preventing cement agglomeration include copolymers of polyethylene glycol mono (meth) allyl ether and maleic anhydride, lene glycol mono (meth) allyl ether and (meth) acrylic acid copolymers, and polyalkylene glycol mono (meth) acrylic acid esters. At least one or two or more of the (meth) acrylic acid copolymer, the methacrylic acid ester having a sulfonic acid group, the (meth) acrylic acid copolymer, and the polyglycerol (meth) acrylic acid ester copolymer may be mixed.
The water-dispersed urethane-based surfactant may be added to the polymer emulsion together with or alone with the polycarboxylic acid-based surfactant. As the water-dispersed urethane-based surfactant, a modified water-dispersed polyurethane copolymer can be used.
In the present invention, a nonionic surfactant for preventing cement aggregation is used in combination with the polycarboxylic acid-based and / or urethane-based surfactant. Nonionic surfactants for preventing cement aggregation include fatty acid diethanolamine compounds, amine oxides, nonylphenol ethylene oxide adducts, sorbitan esterified compounds, alkylpolyglycosides, fatty acid ethylene oxide adducts, polyethylene oxides, polypropylene oxides, polyethylene Polypropylene copolymer, higher fatty acid (C12 to C22) diethanolamine compound, higher fatty acid (C12 to C22) ethylene oxide (EO) adduct (1 to 50 EO), alkyl (C4 to C20) amine oxide, alkyl (C4 to C20) phenol ethylene oxide adducts (1 to 50 EO), sorbitan esterified compounds and ethylene oxide adducts (1 to 50 EO), alkyl (C1 to C20) polyclicoside (molecular weight) 100 ~ 100,000), higher alcohol (C4 ~ C20) ethylene oxide adduct (1 ~ 50 EO), polyethylene oxide (
In addition, the polymer emulsion may include a cement hydration delay agent, the cement hydration delay agent is at least any one or two or more of citric acid, tartaric acid, glucoic acid, glucose, oligosaccharides, sorbitol and molasses are mixed, Cement hydration retardant is added at a ratio of 0.1 to 5% by weight of the entire polymer emulsion.
As described above, in the polymer emulsion added to the concrete according to the present invention, a polycarboxylic acid-based surfactant, a water-dispersed urethane-based surfactant, a nonionic surfactant, and a cement hydration retardant are mixed and used. Experiments were conducted to determine the optimum content ratios for each material.
That is, through experimental considerations, the polycarboxylic acid-based surfactant for preventing cement agglomeration is 0.1 to 10% by weight of the total weight of the polymer emulsion, and the urethane-based surfactant is 0.1 to 5% by weight in the total polymer emulsion. It is preferable to mix the surfactant in a proportion of 0.1 to 10% by weight of the total polymer emulsion, and finally the cement hydration retardant in a ratio of 0.1 to 5% by weight of the total weight of the polymer emulsion.
When the above materials are added below the range of each mixing ratio, the condensation delay effect of the concrete is small, so that the desired working time cannot be secured. If the mixing ratio is exceeded, the condensation is delayed more than necessary to reduce workability. It is desirable to add materials within the above ranges.
When the polymer emulsion of the composition described above is used in concrete, the slump and flow reduction of the concrete are significantly lowered, so that concrete laying work can be performed for at least 1 hour and up to 2 hours after mixing the concrete. If the fluidity of the concrete is maintained for 1 to 2 hours, the concrete laying and jointing work time is sufficiently secured, including the transport time and waiting time from the ready-mixed concrete plant or the site layout plant to the bridge, so that the concrete laying work can be performed with ease. .
When the polymer emulsion having the composition described above is used, the condensation of the concrete is delayed and sufficient working time for laying the concrete on the surface of the road can be ensured while the physical properties of the concrete are also improved. That is, the solid content of the polymer is uniformly dispersed in the concrete to form a polymer film, thereby improving the flexural toughness and adhesion strength of the concrete, and has the advantage of greatly preventing the diffusion of chlorine ions.
In addition, since the polymer-modified concrete according to the present invention is manufactured in a ready-mixed concrete plant or an on-site batch plant, it is possible to freely use a storage facility and a metering facility of various materials, and mix various materials in cement according to the use and properties. .
In order to confirm the effect of the polymer-modified concrete of the configuration as described above was carried out a physical property test.
1 and 2 is a table showing the mixing ratio of the sample for testing the physical properties of the polymer-modified concrete composition according to the present invention. The sample of Nathanata in FIGS. 1 and 2 is in the form of a modified latex cement composition that does not contain aggregates (sand and gravel).
Polymer modified latex cement for the experiment, as shown in the tables of Figures 1 and 2, at least one of a polycarboxylic acid-based surfactant or a water-dispersed urethane-based surfactant for preventing cement aggregation, and a nonionic surfactant for preventing cement aggregation in the latex Is added.
That is, as a polycarboxylic acid type surfactant, the copolymer of polyethyleneglycol mono (meth) allyl ether and maleic anhydride (Example 1, Examples 4-6) or the lenglycol mono (meth) allyl ether and (meth) acrylic acid copolymer Was used (Example 2). As the water-dispersed urethane-based surfactant, a fatty acid diethanolamine compound was used (Example 3). As nonionic surfactants, fatty acid diethanolamine compounds (Examples 1 to 4 and 7 to 9), amine oxides (Example 5) and nonylphenol ethylene oxide (Example 6) adducts were used.
In addition, sodium gluconate was used as a hydration delay agent. In Examples 7 to 9, polyoxyethylene alkylaryl ether or cycloalkyl polyoxyalkylene was used as a shrinkage reducing agent.
And the sample was prepared for the comparative example without a surfactant for comparison with the modified latex cement composition used in the present invention.
The flow (slump loss) experimental results of the above modified latex cement composition are shown in FIG. 3.
Referring to FIG. 3, it can be seen that in the comparative example, the initial flow is significantly reduced to 90 and 75 after 180 mm, 30 minutes, and 60 minutes, respectively. However, in the modified latex cement composition used in the present invention, after the initial and 30 minutes, the flow exceeds 200, and even after 60 minutes, it can be seen that it maintains about 130 to 210 mm except for a part. . In particular, when considering the ready-mixed concrete moving time, the flow after 30 to 40 minutes is very important. In this embodiment, the flow is maintained at about 200mm, it was confirmed that the concrete laying work can proceed smoothly.
Thus, the concrete used in the present invention can be used after transporting to the site by mixing in the ready-mixed concrete factory, etc., because the fluidity of the cement is maintained for a certain period.
On the other hand, the physical properties of the polymer-modified concrete in the form of the aggregate and various admixtures were added to the modified latex cement composition as described above.
Figure 4 is a graph showing an embodiment of the form of adding various admixtures to the polymer-modified concrete (in aggregate-containing concrete form) according to the present invention.
In Examples 10 to 14, modified latex was prepared as the composition ratio of
Slag fine powder was added in Examples 11, 13, and 14, fly ash was added in Examples 11, 13, and 14, and silica fume was added in Examples 13 and 14. In Examples 12 to 14, an expanding agent and a retardant were further added.
Slag fine powder has a specific gravity of 2.90 and a specific surface area of blast of 420 m 2 / kg. Fly ash is a bituminous coal fly ash with a specific gravity of 2.30 and a Blaine specific surface area of 310 m 2 / kg. Fine aggregates are 2.55 as sea sand washing sand, and coarse aggregates are 2.60 as crushed gravel with a maximum dimension of 13mm.
For comparison with the present invention was prepared a comparative example using a normal latex.
The test results are shown in the table of FIG. 5 is a table showing the test results for the physical performance and durability of the polymer-modified concrete shown in FIG.
Referring to Figure 5, in the case of the embodiment according to the present invention after maintaining the slump of about 180 ~
That is, the general latex modified concrete should be completed in 30 minutes after the mixing and joint work due to the deterioration of the slump, while the polymer modified concrete composition according to the present invention fluidity is maintained for up to 2 hours to produce concrete at the factory Afterwards, transport, waiting and working time can be secured.
In addition, in the case of the amount of air affecting the resistance of freezing and thawing during concrete installation, the Example and the comparative example were found to be similar.
On the other hand, since the polymer modified concrete according to the present invention can be manufactured in a factory, it is possible to use a variety of mixed materials, it is possible to improve the physical properties compared to the general latex modified concrete produced in a mobile mixer. In particular, in the case of cross pavement, the salt resistance is important in order to prevent damage from the snow remover containing calcium chloride. Referring to the table shown in FIG. 5, it can be confirmed that the salt resistance of the polymer-modified concrete according to the present invention is excellent.
Referring to Figure 5, in the compressive strength, flexural strength, tensile strength, etc., Examples 1 and 2 and Comparative Examples both show a similar level. However, in Examples 11, 13, and 14 manufactured by mixing fly ash and blast furnace slag, the numerical value was 300 to 600 in the chlorine ion permeation test, so that Comparative Example 900 or another example (not mixing the above materials) 800 ~ 900).
Penetration resistance to chlorine (chlorine ion permeability) is generally poor at 4,000 coulombs because of its good permeability to chlorine ions, and is moderate at 4,000 to 2,000 coulombs, and low at 2,000 to 1,000 coulombs. In other words, it is evaluated as a very low level in the range of 1,000 to 100 coulombs, and a condition in which no water is penetrated in the case of 100 coulombs or less.
In the case of Example 13, the numerical value is 300 coulombs, so the permeability of chlorine ions is very low to prevent damage to concrete even when a lot of snow removal agent is used in winter.
In addition, the use of shrinkage reducing agent and expansion material can greatly reduce the amount of free shrinkage of concrete or manufacture concrete with no shrinkage. Therefore, it is confirmed that the application of the invention can greatly suppress the occurrence of shrinkage cracks in concrete pavement. It became.
Therefore, it is possible to manufacture and construct polymer-modified concrete that can achieve the physical performance and durability required for cross-linking, while reducing the use of expensive polymers by using a mixture that exhibits latent hydraulic and pozzolanic effects and shrinkage reducing agent or expansion material. Confirmed.
As such, when manufacturing concrete in a factory, various mixed materials may be added, thereby increasing the chemical resistance, salt resistance, and durability of the concrete.
As described above, the polymer-modified concrete according to the present invention was able to maintain the fluidity for a certain time after mixing the concrete to produce concrete in the ready-mixed concrete factory or field layout plant to be transported to the bridge to perform bridge pavement . If concrete is manufactured in ready-mixed concrete plants or plants, mass production is possible quickly, and there is an advantage in that construction speed can be improved when the concrete manufactured at the factory is cross-linked.
In addition, when the concrete is manufactured at the factory, various admixtures and admixtures such as blast furnace slag powder, silica fume, and fly ash may be added, thereby improving the physical properties of the concrete to be suitable for bridge pavement.
And manufacturing concrete at the factory has the advantage that the quality of the water can be kept constant because the water content of the aggregate can be kept constant.
While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation and that those skilled in the art will recognize that various modifications and equivalent arrangements may be made therein. It will be possible. Accordingly, the true scope of protection of the present invention should be determined only by the appended claims.
Claims (15)
By mixing cement, aggregate, polymer emulsion and water,
At least one of a polycarboxylic acid-based surfactant for preventing cement aggregation or a water-dispersed urethane-based surfactant for preventing cement aggregation and a nonionic surfactant for preventing cement aggregation are added to the polymer emulsion,
The polymer emulsion comprises a cement hydration retardant,
Wherein said polymer emulsion comprises at least one of latex or acrylic.
Polymer modified concrete composition, characterized in that at least one of fine slag powder, fly ash, silica fume or metakaolin is further mixed.
Polymer modified concrete composition, characterized in that the expansion agent is further mixed to compensate for shrinkage of the concrete.
The expanding agent comprises at least one of Calcium Sulfoaluminate (CSA), lime (CaO) and gypsum.
The CSA is 0.1 to 10% by weight, the lime is 0.1 to 10% by weight, the gypsum is a polymer modified concrete composition, characterized in that mixed in the ratio of the range of 1 to 10% by weight.
The expanding agent is a polymer modified concrete composition, characterized in that the liquid.
The said polycarboxylic acid type surfactant is a copolymer of polyethyleneglycol mono (meth) allyl ether and maleic anhydride, a len glycol mono (meth) allyl ether, a (meth) acrylic acid copolymer, a polyalkylene glycol mono (meth) acrylic acid ester, At least one or two or more of a (meth) acrylic acid copolymer, a methacrylic acid ester having a sulfonic acid group, a (meth) acrylic acid copolymer, and a polyglycerol (meth) acrylic acid ester copolymer are mixed.
The polycarboxylic acid-based surfactant is a polymer-modified concrete composition, characterized in that added in a proportion of 0.1 to 10% by weight of the total polymer emulsion.
The water-dispersed urethane-based surfactant is a polymer-modified concrete composition, characterized in that it comprises a modified water-dispersed polyurethane copolymer.
The water-dispersed urethane-based surfactant is a polymer-modified concrete composition, characterized in that added in a proportion of 0.1 to 5% by weight of the total polymer emulsion.
The nonionic surfactants include fatty acid diethanolamine compounds, amine oxides, nonylphenol ethylene oxide adducts, sorbitan esterified compounds, alkyl polyglycosides, fatty acid ethylene oxide adducts, polyethylene oxides, polypropylene oxides, and polyethylene polys. Propylene copolymer, higher fatty acid (C12 to C22) diethanolamine compound, higher fatty acid (C12 to C22) ethylene oxide (EO) adduct (1 to 50 EO), alkyl (C4 to C20) amine oxide, alkyl ( C4 to C20) phenol ethylene oxide adducts (1 to 50 EO), sorbitan esterified compounds and ethylene oxide adducts (1 to 50 EO), alkyl (C1 to C20) polyclicoside (molecular weight 100 ~ 100,000), high alcohol (C4 ~ C20) ethylene oxide adducts (1 ~ 50 EO), polyethylene oxide (molecular weight 100 ~ 100,000), polypropylene oxide (molecular weight 100 ~ 100,000), polyethylene oxide and polypropylene oxide Coalescing (molecular weight 1 00-100,000), polyethyleneimine (molecular weight 100-100,000), polyglycerol (molecular weight 100-100,000) or at least any one or two or more polymer modified concrete composition characterized in that the mixture.
The nonionic surfactant is a polymer-modified concrete composition, characterized in that added in a proportion of 0.1 to 10% by weight of the total polymer emulsion.
The cement hydration delay agent is mixed with at least one or two or more of citric acid, tartaric acid, gluconic acid, glucose, oligosaccharides, sorbitol and molasses,
The cement hydration retardant is a polymer-modified concrete composition, characterized in that added in a proportion of 0.1 to 5% by weight of the total polymer emulsion.
Preparing a polymer-modified concrete composition for paving the bridge at a ready-mixed concrete plant or a field batching plant and transporting the bridge to the bridge using a ready-mixed vehicle;
Laying the polymer modified concrete on the surface of the bridge; And
The step of curing the polymer-modified concrete composition; bridge construction method characterized in that it comprises a.
The polymer modified concrete composition is a bridge pavement method, characterized in that the polymer modified concrete composition according to any one of claims 1 to 13.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR20120033124A KR101355111B1 (en) | 2012-03-30 | 2012-03-30 | Polymer modified concrete compostion and Bridge pavement method using the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR20120033124A KR101355111B1 (en) | 2012-03-30 | 2012-03-30 | Polymer modified concrete compostion and Bridge pavement method using the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR20130110847A true KR20130110847A (en) | 2013-10-10 |
| KR101355111B1 KR101355111B1 (en) | 2014-01-27 |
Family
ID=49632605
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR20120033124A KR101355111B1 (en) | 2012-03-30 | 2012-03-30 | Polymer modified concrete compostion and Bridge pavement method using the same |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR101355111B1 (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015126059A1 (en) * | 2014-02-20 | 2015-08-27 | 강원대학교산학협력단 | Hybrid concrete composition and method for preparing same |
| KR20150124158A (en) * | 2014-04-28 | 2015-11-05 | 안교덕 | Copolymer for cement admixture, method for preparing the same, and cement composition containing the same |
| KR101636691B1 (en) * | 2016-03-10 | 2016-07-07 | 주식회사 대우씨앤엠 | Synthetic latex modified mortar and concrete composition using precipitated silica and polyethylene oxide |
| CN106145745A (en) * | 2016-06-24 | 2016-11-23 | 桂林华越环保科技有限公司 | A kind of compensating shrinkage of concrete pumping admixture |
| CN107311505A (en) * | 2017-06-09 | 2017-11-03 | 广东福美软瓷有限公司 | A kind of composite of modified industry inorganic powder and the inorganic powder containing modified industry |
| CN108947305A (en) * | 2018-08-24 | 2018-12-07 | 临汾市华基建材科技有限公司 | A kind of existed concrete bridge reinforcing agent |
| KR20190020208A (en) * | 2017-08-17 | 2019-02-28 | (주)제이엔티아이엔씨 | Polymer modified concrete composition with reduced surface tension of water in micro-pores of concrete and paving method using the same |
| CN109704663A (en) * | 2019-03-13 | 2019-05-03 | 哈尔滨工程大学 | It is a kind of efficiently to prepare porous geopolymer method using vegetable oil |
| KR102230402B1 (en) * | 2020-11-20 | 2021-03-24 | (주)삼한개발 | Concrete Composition With Excellent Durability and Repairing Method Using The Same |
| KR102230404B1 (en) * | 2020-11-20 | 2021-03-24 | (주)삼한개발 | Crack Reducing Concrete Composition With Excellent Durability and Repairing Method Using The Same |
| CN114315229A (en) * | 2021-08-16 | 2022-04-12 | 宁波路宝科技实业集团有限公司 | Resin concrete and preparation method thereof, steel bridge deck pavement structure and construction method thereof |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102304911B1 (en) * | 2021-01-13 | 2021-09-27 | (주)씨앤비 | Latex modified high performance concrete and pavement method using the same |
| KR102425854B1 (en) * | 2021-12-30 | 2022-07-28 | 부림산업개발(주) | Polymer concrete composition and construction method for pavement on bridge-deck using the same |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006274009A (en) * | 2005-03-29 | 2006-10-12 | Adeka Corp | Water-dispersible type polyurethane composition |
| US7670426B2 (en) | 2005-09-09 | 2010-03-02 | Jack B. Parson Companies | Concrete mixtures having aqueous foam admixtures |
| KR101099074B1 (en) | 2011-07-04 | 2011-12-27 | 주식회사 제트콘코리아 | Concrete constitution |
| KR101138669B1 (en) * | 2011-08-31 | 2012-04-25 | (주)제이엔티아이엔씨 | Polymer modified concrete compostion and bridge pavement method using the same |
-
2012
- 2012-03-30 KR KR20120033124A patent/KR101355111B1/en active IP Right Grant
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015126059A1 (en) * | 2014-02-20 | 2015-08-27 | 강원대학교산학협력단 | Hybrid concrete composition and method for preparing same |
| KR20150124158A (en) * | 2014-04-28 | 2015-11-05 | 안교덕 | Copolymer for cement admixture, method for preparing the same, and cement composition containing the same |
| KR101636691B1 (en) * | 2016-03-10 | 2016-07-07 | 주식회사 대우씨앤엠 | Synthetic latex modified mortar and concrete composition using precipitated silica and polyethylene oxide |
| CN106145745A (en) * | 2016-06-24 | 2016-11-23 | 桂林华越环保科技有限公司 | A kind of compensating shrinkage of concrete pumping admixture |
| CN107311505A (en) * | 2017-06-09 | 2017-11-03 | 广东福美软瓷有限公司 | A kind of composite of modified industry inorganic powder and the inorganic powder containing modified industry |
| CN107311505B (en) * | 2017-06-09 | 2019-11-19 | 广东福美软瓷有限公司 | A kind of composite material of modified industry inorganic powder and the inorganic powder containing modified industry |
| KR20190020208A (en) * | 2017-08-17 | 2019-02-28 | (주)제이엔티아이엔씨 | Polymer modified concrete composition with reduced surface tension of water in micro-pores of concrete and paving method using the same |
| CN108947305A (en) * | 2018-08-24 | 2018-12-07 | 临汾市华基建材科技有限公司 | A kind of existed concrete bridge reinforcing agent |
| CN109704663A (en) * | 2019-03-13 | 2019-05-03 | 哈尔滨工程大学 | It is a kind of efficiently to prepare porous geopolymer method using vegetable oil |
| KR102230402B1 (en) * | 2020-11-20 | 2021-03-24 | (주)삼한개발 | Concrete Composition With Excellent Durability and Repairing Method Using The Same |
| KR102230404B1 (en) * | 2020-11-20 | 2021-03-24 | (주)삼한개발 | Crack Reducing Concrete Composition With Excellent Durability and Repairing Method Using The Same |
| CN114315229A (en) * | 2021-08-16 | 2022-04-12 | 宁波路宝科技实业集团有限公司 | Resin concrete and preparation method thereof, steel bridge deck pavement structure and construction method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| KR101355111B1 (en) | 2014-01-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101355111B1 (en) | Polymer modified concrete compostion and Bridge pavement method using the same | |
| KR101720504B1 (en) | A high early strength cement concrete composition having the improved durability for road pavement and a repairing method of road pavement using the same | |
| AU2015253548B2 (en) | Concrete materials with modified rheology, methods of making, and uses thereof | |
| KR101300514B1 (en) | High-performance rapid hardening cement concrete composite and repairing method of concrete structure using the composite | |
| KR101665945B1 (en) | Mortar composition of ultra rapid hardening type for repairing and reinforcing with enhanced freezing and thawing durability, salt damage resistance and crack resistance, and method of repairing and reinforcing deteriorated part of road, runway and L-type side gutter using the same | |
| KR101923552B1 (en) | Road pavement composition of very early strength repairing method thereof | |
| KR101533093B1 (en) | High-Early Strength cement concrete composition and concrete pavement repair it using the same method using silicon sludge | |
| KR101422206B1 (en) | High-performance flowing cement mortar composition and surface protection method of concrete structures using the composite | |
| KR101764895B1 (en) | Excellent salt stress and frost stress and chemically resistant concrete repair materials, and method for repairing concrete structure using this same | |
| KR101952135B1 (en) | Crack-Reducing Type Fast Curing Concrete Composition With Excellent Corrosion Resistance and Abrasion Resistance, And Method For Repairing And Rehabilitating Road Pavement Using The Composition | |
| KR101363857B1 (en) | A high-early strength type cement concrete composition for bridge pavement using high-early strength type mixed cement binder and method of bridge pavement using the same | |
| KR101663690B1 (en) | Mortar composition for repairing and reinforcing road gutter and small-damaged part of road, and method of repairing and reinforcing road gutter and small-damaged part of road using the same | |
| CA2987007C (en) | Concrete composition with reduced drying time once hardened | |
| JP7394194B2 (en) | grout mortar | |
| KR101302448B1 (en) | Cement mortar composition and road repair method | |
| KR101621199B1 (en) | Mortar composition for repairing and reinforcing concrete structure of road gutter and small-damaged part of road, and method of repairing and reinforcing concrete structure of road gutter and small-damaged part of road using the same | |
| JP7395633B2 (en) | polymer cement mortar | |
| KR102372576B1 (en) | Polymer admixture modified rapid setting concrete composite and method for reparing and reinforcing concrete structures road pavement using the same | |
| KR100908213B1 (en) | Rapid hardening concrete composition and repairing method using the same | |
| KR101138669B1 (en) | Polymer modified concrete compostion and bridge pavement method using the same | |
| KR101380171B1 (en) | High durable cement for semi-rigid pavement having chloride resistant cement and Semi-rigid pavement method using filling the same in asphalt with vibrating | |
| JP7085050B1 (en) | Cement admixture, hard mortar concrete material, hard mortar concrete composition, and hardened material | |
| KR101804454B1 (en) | Vinyl acetate-ethylene polymer modified concrete compostion and Method for pavement using the same | |
| KR101911830B1 (en) | A cement concrete pavement composite including functions of waterproof and anti-corrosive and cement concrete pavement method using the composite | |
| KR100374122B1 (en) | Composite Materials of High Hardened and Durable Soil-cement Stabilizer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A201 | Request for examination | ||
| E902 | Notification of reason for refusal | ||
| E701 | Decision to grant or registration of patent right | ||
| GRNT | Written decision to grant | ||
| FPAY | Annual fee payment |
Payment date: 20170117 Year of fee payment: 4 |
|
| FPAY | Annual fee payment |
Payment date: 20180117 Year of fee payment: 5 |
|
| FPAY | Annual fee payment |
Payment date: 20191014 Year of fee payment: 6 |
|
| R401 | Registration of restoration |