KR101959437B1 - Eco-Friendly Mortar Composition for Repair Section and Constructing Methods Using Thereof - Google Patents

Abstract

The present invention relates to an eco-friendly mortar composition for repairing a section and a method for repairing a section using the same. According to the present invention, the eco-friendly mortar composition includes: 100 parts by weight of cement; 10-30 parts by weight of seaweed; 10-40 parts by weight of calcium sulfoaluminate; 3-8 parts by weight of silica fume; 5-30 parts by weight of metakaolin; 5-20 parts by weight of methyl methacrylate; 10-60 parts by weight of fly ash; 1-10 parts by weight of polyvinyl alcohol; 5-30 parts by weight of a hardener; 5-20 parts by weight of fiber; 10-40 parts by weight of nano-ceramic particles; 5-15 parts by weight of humectant; 1-10 parts by weight of an adhesion enhancer; and 0.01-10 parts by weight of a superplasticizer. According to the present invention, the eco-friendly mortar composition can improve working environments and reduce environmental pollution. In addition, the eco-friendly mortar composition has rigidity same as or greater than that of existing cement, and can be easily applied to a place requiring rapid curing performance by being rapidly cured, at the same time.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a mortar composition for repairing environment-

The present invention relates to an eco-friendly section repair mortar composition and a method of repairing a section using the same, and more particularly, to a repair and reinforcement of a structure, a cut surface, a slope arrangement, a bridge, a road improvement, a tunnel, To a mortar composition for maintenance of an environmentally friendly section and to a maintenance method using the same.

In general, crude steel Portland cement is used for repairing and / or reinforcing areas where corrosion or erosion occurs frequently, such as the bottom plate of a bridge, the road surface and the outer wall of a building.

Although crude steel Portland cement is superior in workability to general cement, there is a problem that concrete is corroded due to penetration of chloride or water due to high permeability.

Especially, since the curing time of cement concrete is long due to its characteristics, it is difficult to use it for urgent repair work which must be completed within a short time due to the characteristics of the work.

Recently, polymer cement concrete with polymer emulsion added to concrete has been increasingly used to overcome the shortcomings of crude steel Portland cement used for emergency repair.

However, the existing polymer cement concrete provides a cause of increase of the construction cost by using expensive polymer dispersion.

In addition, polymeric cement concrete with ultra low velocity is likely to cause initial plastic cracking due to rapid evaporation of initial moisture due to the characteristics of the material itself, and it is easy to cause cracking due to high shrinkage and hydration heat.

In order to overcome such a problem, Korean Patent No. 10-1512962 discloses a cement composition comprising 7 to 25 parts by weight of a cement binder, 35 to 1,000 parts by weight of fine aggregate; 25 to 1,000 parts by weight of coarse aggregate; 0.05 to 3 parts by weight of a water reducing agent; 10 to 30 parts by weight of ash; 3 to 15 parts by weight of calcium sulfoaluminate; 3 to 15 parts by weight of methyl methacrylate; 5 to 10 parts by weight of high-performance powder; 5 to 15 parts by weight of a moisturizer; 1 to 5 parts by weight of a moisturizing adjuvant; 5 to 10 parts by weight of minerals; 3 to 8 parts by weight of silica fume; And 5 to 20 parts by weight of slag.

Further, a method of curing concrete by using a quick-setting method for rapid curing can be used.

On the other hand, in the present invention, there is an inorganic salt type quick-setting admixture mainly comprising sodium silicate and / or potassium silicate, and calcium aluminate hydrate, etringing etc. And a quick-setting material containing a rapid-hardening mineral which rapidly cures the cement. There is a cement-based quick-setting material containing calcium aluminate and / or calcium sulfoaluminate.

Here, the cementitious quick-setting admixture is superior in long-term strength to that of the quick-setting admixture containing the inorganic salt and the hard hard mineral.

However, the above-mentioned cement-based quick-setting material is alkaline, and if it is used in a large amount, it is difficult to work in a specific place such as a closed space, and there is a possibility to pollute nearby soil.

The present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to improve the working environment by using seaweeds and calcium sulfoaluminate, and to provide an environmentally friendly surface treatment having a strength equal to or higher than that of the conventional cement composition To provide a mortar composition.

The present invention

On the basis of 100 parts by weight of cement,

10 to 30 parts by weight of seaweeds;

10 to 40 parts by weight of calcium sulfoaluminate;

3 to 8 parts by weight of silica fume;

5 to 30 parts by weight of meta-kaolin;

5 to 20 parts by weight of methyl methacrylate;

10 to 60 parts by weight of fly ash;

1 to 10 parts by weight of polyvinyl alcohol;

5 to 30 parts by weight of a curing agent;

5 to 20 parts by weight of fibers;

10 to 40 parts by weight of nano-ceramic particles;

5 to 15 parts by weight of a moisturizer;

1 to 10 parts by weight of an adhesion promoter; And

And 0.01 to 10 parts by weight of a high-performance water reducing agent.

In addition, the present invention provides a method for removing foreign substances on a reinforcing surface to be reinforced,

10 to 30 parts by weight of seaweed, 10 to 40 parts by weight of calcium sulfoaluminate, 3 to 8 parts by weight of silica fume, 5 to 30 parts by weight of meta-kaolin based on 100 parts by weight of cement, 5 to 20 parts by weight of methyl methacrylate, 10 to 60 parts by weight of fly ash, 1 to 10 parts by weight of polyvinyl alcohol, 5 to 30 parts by weight of curing agent, 5 to 20 parts by weight of fibers, 10 to 40 parts by weight of nanoceramic grains A mortar composition comprising 5 to 15 parts by weight of a moisture-retaining agent, 1 to 10 parts by weight of an adhesion promoter, and 0.01 to 10 parts by weight of a high-performance water reducing agent; And

And a curing step of curing the cement composition after the pouring step is completed. The present invention also provides a method of constructing an environmentally friendly section repair mortar composition.

The mortar composition for repairing an environmentally friendly section according to the present invention can be easily applied to a use site where the work environment is improved and the environmental pollution is reduced, the cement has a strength equal to or higher than that of the conventional cement,

Hereinafter, the present invention will be described in detail.

In one aspect, the present invention provides a cement composition comprising, based on 100 parts by weight of cement, 10 to 30 parts by weight of seaweeds; 10 to 40 parts by weight of calcium sulfoaluminate; 3 to 8 parts by weight of silica fume; 5 to 30 parts by weight of meta-kaolin; 5 to 20 parts by weight of methyl methacrylate; 10 to 60 parts by weight of fly ash; 1 to 10 parts by weight of polyvinyl alcohol; 5 to 30 parts by weight of a curing agent; 5 to 20 parts by weight of fibers; 10 to 40 parts by weight of nano-ceramic particles; 5 to 15 parts by weight of a moisturizer; 1 to 10 parts by weight of an adhesion promoter; And 0.01 to 10 parts by weight of a high-performance water reducing agent.

According to another aspect of the present invention, there is provided a method for removing foreign matters from a surface of a reinforcement surface to be reinforced, 10 to 30 parts by weight of seaweed, 10 to 40 parts by weight of calcium sulfoaluminate, 3 to 8 parts by weight of silica fume, 5 to 30 parts by weight of meta-kaolin based on 100 parts by weight of cement, 5 to 20 parts by weight of methyl methacrylate, 10 to 60 parts by weight of fly ash, 1 to 10 parts by weight of polyvinyl alcohol, 5 to 30 parts by weight of curing agent, 5 to 20 parts by weight of fibers, 10 to 40 parts by weight of nanoceramic grains A mortar composition comprising 5 to 15 parts by weight of a moisture-retaining agent, 1 to 10 parts by weight of an adhesion promoter, and 0.01 to 10 parts by weight of a high-performance water reducing agent; And a curing step of curing the cement composition after the pouring step is completed.

The mortar composition for repairing eco-friendly sections according to the present invention can be applied to all kinds of construction including construction and / or civil engineering works, bridges, road improvement, tunnels, dams, Do.

The cement according to the present invention is not particularly limited as long as it is a cement conventionally used in the art, but it is preferable to use special Portland cement, special cement such as slag cement, ultra fine powder cement, and ultra rapid cement.

The preferred powder of the cement is preferably 3,200 to 6,500 cm ² / g.

The content of the components other than cement constituting the mortar composition according to the present invention, specifically the environmentally friendly mortar composition for maintenance of the section, is based on 100 parts by weight of cement.

The seaweed according to the present invention is contained in a mortar composition, specifically, an environment friendly mortar composition for repairing an environmentally friendly section, thereby preventing shrinkage of the composition during drying and curing so that it is not easily broken due to cracking, bending and impact strength.

In addition, the seaweed according to the present invention not only provides a waterproof effect but also prevents damage during freezing and thawing by filling voids of the cross section repaired with the mortar composition.

In addition, the above-mentioned algae not only promotes bonding between components constituting the mortar composition, but also prevents cracks, prevents permeation water and portholes, and reduces noise.

Here, since about 8,000 species of algae live in the world and about 500 species live in the sea of Korea, all of them can be used. Preferably, algae such as green algae, brown algae, red algae or at least one of them are preferably used.

Examples of the preferable algae include green algae such as barnyardgrass, hallucinophyta, sea cucumber, parasites, hearing, beard hearing, jadebug, and salt weekly, but the present invention is not limited thereto, and the brown algae include seaweed, kelp, But the present invention is not limited thereto. Examples of the red algae include red sea bream, red sea bream, red sea bream, red sea bream, red sea bream, It is also possible to use such as, but not limited to, umbrella, umbrella, kotony, dog gambling, round bud, dog umbrella, umbrella, umbrella, crocodile, umbrella, true gambling, But is not limited thereto.

In a specific embodiment, seaweeds according to the present invention may also be used in the form of dried seaweed, powdered seaweeds or concentrated concentrates.

Preferably, the amount of the algae to be used is 10 to 30 parts by weight based on 100 parts by weight of the cement.

Calcium Sulfo Aluminate according to the present invention is a material for imparting shrinkage compensation, high strength, for example, high compressive strength, bending strength and ultrahigh hardness. Any calcium sulphoaluminate having such a purpose can be used It is recommended that the amount of cement is 10 to 40 parts by weight based on 100 parts by weight of cement.

If the calcium sulfoaluminate is used in an amount less than 10 parts by weight, the curing rate may decrease. If the calcium sulfoaluminate is used in an amount of more than 40 parts by weight, the volume may expand.

On the other hand, when calcium sulfoaluminate comes into contact with water, the calcium sulfoaluminate reacts instantaneously to generate an ettringite hydrate, so that the compressive strength of the cement composition can be obtained within several minutes to several hours.

At this time, ultrafine amorphous calcium sulfoaluminate may be used for a quick hydration reaction.

The blast powder of the ultrafine amorphous calcium sulfoaluminate used for increasing hydration reactivity is preferably about 5,000 to 8,000 cm 2 / g.

In a particular embodiment, the calcium sulfoaluminate according to the present invention is comprised of 28 to 62 wt.% Rolled end sludge, 19 to 52 wt.% Dolomite sludge, and 9 to 20 wt.% Gypsum plaster, By weight and the balance of 5 to 20% by weight.

Thereafter, the mixture is maintained at a firing temperature of 1,000 to 1,300 DEG C for at least one hour in a firing furnace, followed by air cooling to produce calcium sulfoaluminate. At this time, when the calcination temperature is low or the content of dolomite sludge is high, the amount of unreacted lime is increased to cause expansion, so there is a risk of collapse and destruction. When the calcination temperature is high or the amount of limestone is at least calcium sulphoaluminate The production is small and the desired purpose can not be achieved.

The silica fume according to the present invention is a by-product generated in the production of metal silicon or a silicon alloy, the shape of which is spherical, and most of the chemical components are SiO ₂ . When added to concrete or the like, the viscosity increases and high compressive strength is obtained.

The preferred amount of silica fume to be used is 3 to 8 parts by weight based on 100 parts by weight of cement.

The meta-kaolin according to the present invention is preferably a conventional metakaolin in the art, and the amount of the meta kaolin used is preferably 5 to 30 parts by weight based on 100 parts by weight of cement.

The meta-kaolin has a rapid reaction rate in the initial stage of hydration and improves its initial strength. In the organs, it reacts with Ca (OH) ₂ generated during cement hydration process to produce CASH (Calcium Aluminum Silicate Hydroxide) Compared to concrete made using ordinary cement, the pores are made more dense to improve the strength.

Methyl methacrylate (MMA) according to the present invention is intended to improve the physical / chemical safety of a mortar composition, specifically, a mortar composition for repairing a section, and is harmless to the human body and has excellent environmental friendliness However, it is possible to maintain excellent binder physical properties and mechanical properties, and to significantly reduce cracks and dropouts caused by an external impact or environment.

The methyl methacrylate is a mixture of 49 to 70% by weight of a low viscosity methyl methacrylate resin having a viscosity of 10 to 1,000 cps and 20 to 50% by weight of a high viscosity methyl methacrylate having a viscosity of 2,000 to 20,000 cps. Modified methyl methacrylate obtained by mixing 1 to 10% by weight of at least one selected from styrene isoprene styrene (SIS), styrene butadiene rubber (SBR), and styrene butadiene styrene (SBS) may be used.

If the content of SIS, SBR and / or SBS is less than 1% by weight, cracks may occur due to a decrease in impact resistance. If the content of SIS, SBR and / or SBS exceeds 10% by weight, the viscosity of the modified methyl methacrylate resin Sexual problems can occur.

Preferably, the amount of methylmethacrylate used is 5 to 20 parts by weight based on 100 parts by weight of cement.

The fly ash according to the present invention can be used in an appropriate amount and mixed with an environmentally friendly section repair mortar composition to improve workability and alleviate hardening heat and improve long-term strength and water tightness.

The fly ash is not particularly limited as long as it is the fly ash used for the above-mentioned purpose, but it is preferable to use coal ash collected from the flue gas of the boiler which burns the pulverized coal with the dust collector.

The particle size of the fly ash is about the same as that of cement, and alumina and silica are the main components.

As a specific aspect, the fly ash according to the present invention can use finely pulverized fly ash, and the finely pulverized fly ash provides improved high strength and / or fluidity than using non-pulverized fly ash .

The fineness of the pulverized fly ash according to the present invention is in the range of 3,000 to 3,800 cm ² / g, preferably 3,000 to 3,800 cm ² / g, more preferably 3,700 cm ² / g, Cm < ² >, preferably about 2.2 g / cm < ³ >.

The amount of the fly ash is preferably 10 to 60 parts by weight based on 100 parts by weight of the cement.

The polyvinyl alcohol according to the present invention increases the initial tacky property and improves the initial adhesive force to reduce the defective rate such as floating phenomenon and warping. The polyvinyl alcohol according to the present invention, Any alcohol may be used, and the amount thereof is preferably 1 to 10 parts by weight based on 100 parts by weight of cement.

The curing agent according to the present invention is used for rapidly curing the mortar composition for repairing environmentally friendly sections. Any curing agent conventionally used in the art may be used for this purpose. The curing agent may be used in an amount of 100 parts by weight 5 to 30 parts by weight is preferably used.

Preferred curing agents include 2-diethylaminoethylamine, N-butyldiethanolamine, 2-diisopropylaminoethylamine, 3-dimethylamino-1-propylamine, 3- diethylaminopropylamine, triethanolamine, tri N, N-dimethylethanolamine, cyclohexylamine, 3-dimethylaminopropane, hexamethylene diisocyanate (HDI), toluene diisocyanate (TDI), isopropanolamine, isopropanolamine, , Isophorone diisocyanate (IPDI), 4,4'-methylenebis (cyclohexylisocyanate), castor oil such as castor oil, hydrogenated castor oil, or a mixture of at least one selected from these.

The fiber according to the present invention is intended to provide a tensile force and / or lightweight due to the stress applied in the longitudinal-transverse direction of the repair surface formed of the mortar composition, and any fiber having such a purpose may be used , Preferably basalt fiber, aramid fiber, glass fiber, carbon fiber, metal fiber, or a mixture of at least one selected from the above, and the amount of use is preferably 5 to 20 parts by weight based on 100 parts by weight of cement.

Here, the basalt fiber has chemical properties similar to those of glass fiber. In other words, both glass and basalt are amorphous materials based on silica.

As the use of glass fiber is diversified, the annual average annual production amount reaches about 3 million tons.

In addition, there are various kinds of the above-mentioned glass fiber, but glass fiber (E glass) is a main product when it is based on the amount of water.

 Compared with ordinary glass fibers and basalt fibers, glass fibers are composed of various components and have a density as low as 2.6 to 2.7 g / cm 3. However, the basalt fiber has high strength and high heat resistance, and its function is excellent when it is used as a composite material .

In particular, the basalt fiber can be used for various purposes because of economical efficiency (low cost) required for reinforcing the strength.

Moreover, the basalt fibers are characterized by moderate strength (strength per unit area), high oxidation resistance, electrical insulation, easy processability and raw material procurement, and very low cost.

In this respect, the advantage of carbon fiber is limited to low density and high strength, and it is advantageous to have basalt fiber in comparison with carbon fiber which is expensive and in short supply.

Meanwhile, the aramid fiber according to the present invention is formed into a filament form used for making a fabric in a yarn form, a pulp form used for making a product in a powder form, a yarn thickness can be freely adjusted, There is a staple shape which is subjected to a weak grinding process for use in blending with a yarn. In the present invention, it may be applied to any one of the double-selected shapes as required.

On the other hand, the aramid fiber has a single shape and its length is 1 to 100 mm, preferably 3 to 40 mm, and the diameter or thickness of the cross section is 1 to 50 탆, preferably 10 to 40 탆. The length and diameter or thickness of the aramid may be adjusted to an optimum range depending on the quality, durability, tensile strength, bending strength and toughness of the desired mortar composition, and it is preferable to use the single length and the single diameter to maintain a single shape .

The single shape in the aramid means that no fibers having different lengths or diameters are mixed, and it is preferable that the aramid has a single shape having a single length and a single diameter in terms of dispersibility in the mortar composition.

The aramid has an intensity of 8.5 g / d or more, preferably 9.5 g / d or more as measured by a gauge length of 5 mm, an elongation of 60 to 135% as measured by a gauge length of 5 mm, Can be from 75 to 115%.

In the present invention, if the strength and elongation of the aramid are out of the above range, the effect of improving crack resistance and the like of the mortar composition may be weakened.

The aramid may have a relative viscosity (RV) of 2.9 or more, and preferably 3.2 or more. If the relative viscosity (RV) of the aramid is lower than the above range, the strength and abrasion resistance of the fiber itself may deteriorate.

In the present invention, the aramid may have a fineness of 1 to 10 denier, preferably 1.5 to 5 denier.

If the fineness is less than 1 denier, the surface area of the fiber increases and the contact area increases. However, the strength of the fiber itself may be lowered and the dispersibility of the fiber in the mortar composition may be lowered. On the other hand, when the fineness is more than 10 denier, the number of fibers per unit area of the mortar composition may decrease and a risk of forming a weak portion in the mortar composition may be relatively generated.

In a particular embodiment, the aramid fibers according to the present invention may comprise a dispersed agent coated form.

The aramid coated with the dispersant has an advantage of being excellent in tensile strength, abrasion resistance, durability and the like. When mixed with the mortar composition, the aramid inherent characteristics as described above can be imparted to the flame retardant mortar composition, , The aramid can improve the insulation performance due to its low thermal conductivity property.

In another specific embodiment, the aramid fibers according to the present invention may be coated with a coating solution comprising an ester-based lubricant and a non-ionic surfactant on the surface thereof, and through this coating, the dispersibility in the mortar composition and the bonding strength between the composition and the composition .

Considering the effect of improving the dispersibility and the bonding strength of the aramid, the coating amount of the coating solution is preferably 0.5 to 3% by weight based on the total weight of the aramid, but is not limited thereto.

The nanoceramic particles according to the present invention float on the surface of the maintenance surface during the curing of the mortar composition to form a dense and hard surface, thereby preventing permeation of water vapor and other gases and liquids, Weather resistance, impact resistance and chemical resistance are improved.

The amount of the nanoceramic particles used is preferably 10 to 40 parts by weight based on 100 parts by weight of cement.

Preferred nanoceramic particles include silicon carbide, alumina, silica, zirconia-silica, ZnO, TiO ₂ and / or CaCO ₃ .

Preferably, the average particle size of the ceramic particles is in the range of 300 to 500 nm, the average particle size of the alumina is 500 to 1000 nm, the average particle size of the silica is 700 to 1500 nm, the zirconia- It is preferable that the average particle size of silica is 500 to 1000 nm, the average particle size of ZnO is 500 to 1000 nm, the average particle size of TiO ₂ is 100 to 300 nm, and the average particle size of CaCO ₃ is 500 to 1000 nm.

Among them, silicon carbide does not exist as natural minerals, so it is synthesized artificially, has excellent chemical stability and corrosion resistance at high temperature, and has high hardness.

The moisturizing agent according to the present invention is intended to maintain the moisture of the mortar composition and is not particularly limited as long as it is a conventional moisturizing agent having such a purpose, but is preferably hydroxyethylcellulose, hydroxypropylmethylcellulose, ethylhydroxyethylcellulose, methyl Hydroxyethylcellulose, or a mixture of at least one selected from these, and the amount of the curing agent used is preferably 5 to 15 parts by weight based on 100 parts by weight of the cement.

The adhesion promoter according to the present invention is intended to make it possible to more easily adhere to the contact surface on which the mortar composition is applied. Any adhesion promoting agent conventionally used in the art can be used for this purpose, but preferably, Roile phosphate, hydroxyethyl methacrylate phosphate or a mixture thereof may be used, and it is recommended that the amount thereof is 1 to 10 parts by weight based on 100 parts by weight of cement.

The high performance water reducing agent according to the present invention is an admixture used for adjusting a small air bubble in a mortar composition, specifically, an environment friendly mortar composition for repairing an environmentally friendly section, has good foaming properties, It improves freezing and thawing resistance, corrosion resistance and durability by generating bubbles evenly.

Particularly, the water reducing agent is added to premixed base cement or the like to make it smoother by stirring it, and is used for the purpose of improving the workability of the cement without deteriorating the quality of the cement.

Moreover, the water reducing agent has a secondary effect such as facilitating the pouring work by improving the fluidity of the cement composition, lowering the thermal conductivity of hard concrete, and improving watertightness.

At this time, the water reducing agent used in the cement composition generally has a water reducing rate of about 10 to 15%, but a water reducing rate of 20 to 30% is generally referred to as a high water reducing agent in the present invention.

The preferred high performance water reducing agent is preferably a naphthalene type, a melamine type, a polycarboxylic acid type, an aminosulfonic acid type water reducing agent or a mixture thereof. The content thereof is not particularly limited and can be appropriately adjusted as required. 0.01 to 10 parts by weight may be used as a basis.

Typical examples of the naphthalene-type water reducing agent include modified lignin, alkylarylsulfonic acid and active persistent polymer, a polyalkylisocyanate and a reactive polymer, an alkylarylsulfonic acid salt condensate, a sulfonic acid group carboxyl group-containing polyol polymer, an alkylnaphthalene sulfonate, Sulfonic acid salt-modified lignin co-condensates, modified lignin, lignin derivatives and alkylaryl sulfonates, or at least one selected from these.

Representative examples of the melamine-type water reducing agent include a modified methylmelamine condensate and a water-soluble special polymer compound, a sulfonated melamine condensate, and a mixture of at least one selected from the foregoing.

Representative examples of the polycarboxylic acid type water reducing agent include a copolymer containing an unsaturated carboxylic acid monomer as a single component or a salt thereof such as poly (alkylene glycol) monoacrylate, poly (alkylene glycol) monomethacrylate, Styrene copolymers, copolymers of acrylates and methacrylates, and copolymers derived from monomers copolymerizable with these monomers.

Typical examples of the aminosulfonic acid-based water reducing agent include an aromatic aminosulfonic acid-based polymer compound, an aromatic polymer condensate, a lignin sulfonic acid derivative, and a mixture of at least one selected from the foregoing.

It is also preferable to use a naphthalene-type high-performance water reducing agent alone or a mixed composition comprising 80 to 95 wt% of a naphthalene-based high-performance water reducing agent and 5 to 20 wt% of a polycarboxylic acid-type high-

It is recommended that the preferred amount of the high-performance water reducing agent be 0.01 to 10 parts by weight based on 100 parts by weight of the cement.

The mortar composition according to the present invention, particularly the environmentally friendly mortar composition for repairing a section, may further comprise one or more additives according to the following specific embodiments.

As a specific aspect, the mortar composition according to the present invention, particularly the environmentally friendly mortar composition for maintenance, may further comprise 1 to 15 parts by weight of the water absorbent polymer based on 100 parts by weight of the cement.

Here, the water absorbent polymer absorbs water to expand the water absorbent polymer to function as a ball bearing, thereby improving workability of the mortar composition for maintenance of an environmentally friendly section, thereby reducing the unit water and increasing the strength.

Preferred water absorbent polymers are at least one or more mixtures selected from polyacrylate salts and derivatives thereof, polyethylene oxide derivatives and water absorbent polyurethanes.

In another specific embodiment, the mortar composition according to the present invention may further comprise 0.1 to 5 parts by weight of a curing accelerator based on 100 parts by weight of cement to provide quicker curing.

As the preferred curing accelerator, any curing accelerator may be used as long as it is a conventional curing accelerator in the art. Preferably, calcium chloride, sodium hydroxide or a mixture of at least one selected from these is used. 0.1 to 5 parts by weight is preferably used.

In another specific embodiment, the mortar composition according to the present invention may further comprise 1 to 10 parts by weight of an emulsifier based on 100 parts by weight of cement.

Herein, the emulsifier is used for easily dispersing each constituent when the composition constituting the mortar composition for maintenance of environmentally friendly cross-section is mixed with water. Preferred emulsifiers are anionic emulsifiers, specifically sodium acid salt of a resin, sodium ligninsulfonate Metal salts, naphthalene sulfonic acid derivatives, chlorobenzene derivatives, higher fatty acid alkali metal salts, alkylbenzene sulfonates, alpha-olefin sulfonates, polyoxyethylene alkylphenyl ethers, sodium alkylaryl sulfonates Or a mixture thereof.

In another specific embodiment, the mortar composition for repairing environmentally friendly sections according to the present invention is characterized in that the mortar composition for repairing environmentally friendly cross-sectional areas is 10 to 100 parts by weight based on 100 parts by weight of cement so as to improve fluidity while eliminating the release of harmful substances, To 70 parts by weight of slag.

The preferred slag may be steel making slag and / or blast furnace slag.

At this time, the steelmaking slag and / or the blast furnace slag may be recycled by recycling steelmaking and / or blast furnace slag to be recycled.

Specifically, the steelmaking slag and / or blast furnace slag according to the present invention can be used by collecting what is generated as a by-product in a steelmaking or steelmaking process.

Fineness of preferred slag is 3,700 to 4,000cm ² / g, preferably from about 3,850cm ² / g, the density is preferably of 2.9 to 3.5g / cm ^3, preferably from about 3.1g / cm ^3.

In another specific embodiment, the mortar composition for repairing environmentally friendly sections according to the present invention may further comprise 20 to 60 parts by weight of a prepolymer based on 100 parts by weight of cement in order to improve a curing rate.

Preferred prepolymers are prepared by reacting 25 to 30% by weight of a polyether polyol, polyester polyol, copolymer polyol, ethylene glycol, propylene glycol or a mixture of at least two selected from the foregoing with 70 to 75% by weight of methylene diphenyl diisocyanate And a polyurethane prepolymer.

Here, the polyol affects fluidity and workability before curing, affects physical and chemical performance after curing, and blistering phenomenon and unevenness may occur on the surface during curing when it is used in excess, It is preferable to adjust it appropriately.

The polyol constituting the prepolymer, for example, a polyether polyol, a polyester polyol, a copolymer polyol, ethylene glycol or propylene glycol is reacted with methylene diphenyl diisocyanate to prepare a polyurethane prepolymer.

At this time, it is recommended to use castor oil as the hardener used for curing the prepolymer, and it is preferable that it contains 10 to 30% by weight of castor oil based on the total weight of the hardener according to the present invention.

Particularly, it is a curing agent having an emulsion form including castor oil constituting the above-mentioned curing agent, for example, castor oil and hydrogenated castor oil.

At this time, since the castor oil is present in an emulsion form, it is preferable that the solvent is preferably water, and the amount of water used is at least 20 wt% or more based on the weight of the curing agent having the emulsion form.

In another specific embodiment, the mortar composition for repairing environmentally friendly sections according to the present invention may further comprise 1 to 10 parts by weight of a smoothing agent based on 100 parts by weight of cement.

The smoothing agent is added in order to improve the self-leveling (self-charging performance) of the paste, and any one or more selected from the group consisting of a polyoxide system, a urethane system and a polycarboxylic acid system may be used. However, May be used.

In another specific embodiment, the mortar composition for repairing environmentally friendly sections according to the present invention may further comprise 1 to 5 parts by weight of an antidegradant based on 100 parts by weight of cement.

Herein, the deterioration inhibitor is for preventing deterioration of the mortar composition for repairing environmentally friendly cross-section, and any conventional deterioration inhibitor in the art having such an object may be used.

Preferable antioxidants, specifically ozone deterioration inhibitors, include 6PPD (N- (1,3-dimethylutyl) -N'- phenylphenylenediamine) and / or TAPDT (2,4,6-

The present invention relates to an ozone deterioration inhibitor which is capable of promoting deterioration of a cement composition by oxidation of an ozone radical activated in water, including 1,4-dimethylpentyl-p-phenylenediamino) -1,3,5- The double bond portion of the aromatic ring compound macromolecule may be counteracted with the ozone radical activated by the free electron transfer phenomenon to retard deterioration and deterioration of the cement composition.

That is, the ozone deterioration inhibitor may be a phenylenediamine-based wax, a mixed resin composition containing 6PPD and TAPDT, or an aromatic polyamine system in which radical generation is active. In particular, phenylenediamine- It is preferable to use a system.

In another specific embodiment, the mortar composition for maintenance of environmentally friendly sections according to the present invention is an aminofunctional siloxane which effectively cures at room temperature and provides improved properties such as heat resistance, low temperature performance, chemical resistance, solvent resistance and oil resistance, As shown in FIG.

The amino-containing siloxane is not particularly limited, and examples thereof include aminomethylpolydimethylsiloxane. The amount of the amino-containing siloxane is preferably 1 to 8 parts by weight based on 100 parts by weight of cement.

In another specific embodiment, the mortar composition for repairing environmentally friendly sections according to the present invention may further contain octyltriethoxysilane for improving the adhesion and the adhesion strength of the cement composition.

The octyltriethoxysilane can be used in the form of a monomer. The molecular weight of the monomer is not particularly limited, but is preferably 150 to 450 Da, and the amount of the octyltriethoxysilane used is 5 to 20 parts by weight based on 100 parts by weight of cement I recommend you.

In another specific embodiment, the mortar composition for repairing eco-friendly sections according to the present invention may further contain magnesium silicate in an amount of 1 to 5 parts by weight based on 100 parts by weight of cement in order to prolong the life of the composition.

Since the magnesium silicate has excellent chemical resistance, chemical resistance and weathering resistance, the life of the cement composition is prolonged.

In another specific embodiment, the mortar composition for repairing environmentally friendly sections according to the present invention may further contain sodium bentonite in an amount of 1 to 3 parts by weight based on 100 parts by weight of cement in order to make the pores compact, prevent water leakage, and improve the strength .

The sodium bentonite absorbs a large amount of water and expands to several times its original volume, and becomes a gel-like state, so that the pores of the composition become dense and dense, thereby preventing water leakage and improving strength and contributing to prevention of cracks.

The mortar composition for repairing an environmentally friendly section according to the present invention further comprises 20 to 60 parts by weight of a modified silane silicate compound based on 100 parts by weight of cement in order to improve crack resistance, water resistance, stain resistance, abrasion resistance and / can do.

Herein, the modified silane silicate compound acts as a crosslinking agent to improve the tackiness of the composition by forming organic-inorganic polymerization reactivity.

The modified silane silicate compound can be prepared by mixing silicate and silane.

The preferred silicate may be any silicate commonly used in the art, but more preferably an alkali silicate, particularly preferably a lithium silicate, a pure potassium silicate, a pre-treated potassium silicate, a synthetic silicate (lithium, , Potassium), colloidal silica, or a mixture of at least one selected from these. However, the present invention is not limited thereto.

The preferred silane may be any silane commonly used in the art, but it may be any one selected from aminosilane, vinylsilane, epoxysilane, methacrylsilane, sulfur, alkylsilane, phenylsilane, vinyltrichloro Silane, n-hexyltriethoxysilane, aminoethylaminopropylsilane, phenyltrimethoxysilane, vinylbenzylaminoethylaminopropyltrimethoxysilane, methyldimethoxysilane, methacryloxypropyltrimethoxysilane, aminoethylamino It is preferable to use at least one selected from the group consisting of propyltrimethoxysilane, vinyltrimethoxysilane, tetraethoxysilane (TEOS), 3 glycidoxypropyltrimethoxysilane, aminopropyltrimethoxysilane, and mixtures thereof. However, the present invention is not limited thereto.

The method for preparing the modified silane silicate compound by mixing the silicate and the silane is not particularly limited but preferably 0.1 to 2 parts by weight of silane is added to the silicate at a temperature ranging from 95 to 110 ° C And stirring for 1 to 2 hours at a speed of 200 to 400 rpm.

In another specific embodiment, the mortar composition for repairing environmentally friendly sections according to the present invention may further comprise 0.1 to 1 part by weight of sodium benzoate based on 100 parts by weight of cement in order to improve viscoelasticity, wherein sodium benzoate If the amount is less than 0.1 part by weight, the effect is insignificant. If the amount is more than 1 part by weight, excessive amount of the compound may deteriorate the physical properties.

In another specific embodiment, the mortar composition for repairing environmentally friendly sections according to the present invention further comprises 1 to 5 parts by weight of sodium dodecyl stearate based on 100 parts by weight of cement in order to ensure permeability while preventing moisture penetration on the surface of the composition If the amount is less than 1 part by weight based on 100 parts by weight of the cement, the desired moisture permeation preventing function can not be obtained. If the amount exceeds 5 parts by weight, the strength of the composition is lowered.

In another specific embodiment, the mortar composition for maintenance of environmentally friendly cross-section is prepared by mixing 5 to 100 parts by weight of cement based on 100 parts by weight of cement to prevent environmental pollution by preventing harmful components present on the surface to be bonded, 15 parts by weight of dimethyl ammonium chloride.

In another specific embodiment, the mortar composition for eco-friendly section repair according to the present invention is characterized in that in order to prevent corrosion of reinforcing bars embedded in the concrete of a structure to which an eco-friendly section reinforcing mortar composition is applied, sodium hypochlorite is added to cement To 0.1 to 2 parts by weight.

In another specific embodiment, the mortar composition for repairing an environmentally friendly section according to the present invention may further contain sodium sulfate in an amount of 0.1 to 3 parts by weight based on 100 parts by weight of cement in order to improve the initial reaction rate of the composition.

As another specific embodiment, the mortar composition for repairing environmentally friendly sections according to the present invention delays the initial reaction and further increases the workability and quality stability by increasing the pot life without adding water to the summer season, Sodium oleate may be further added in an amount of 1 to 5 parts by weight based on 100 parts by weight of cement in order to increase the adhesive strength.

In another specific embodiment, the mortar composition for maintenance of an environmentally friendly section according to the present invention may further comprise calcium oxide (CaO) in an amount of 1 to 5 parts by weight based on 100 parts by weight of cement for the purpose of moisture absorption and control of the composition, If the amount is less than 1 part by weight, bubbles and pinholes may occur. If the amount is more than 5 parts by weight, viscosity tends to increase.

In another specific embodiment, the mortar composition for repairing an environmentally friendly section according to the present invention is prepared by mixing welan gum in an amount of 0.1 to 3 parts by weight based on 100 parts by weight of cement in order to prevent separation of materials depending on the specific gravity difference between the components of the composition. Weight parts.

In another specific embodiment, the mortar composition for repairing an environmentally friendly section according to the present invention is a mortar composition for improving the dispersibility, plasticity and water retention of the composition, and for preventing cracking and improving the strength, cocobetain is added in an amount of 1 to 5 parts by weight .

In another specific embodiment, the mortar composition for maintenance of environmentally friendly sections according to the present invention may further comprise 1 to 5 parts by weight of sodium alginate based on 100 parts by weight of cement for enhancing the viscosity of the composition and enhancing the adhesion, C ₆ H ₈ O ₆ ) n, which is a polysaccharide having a carboxyl group and can be made by soda ash treatment of sea tangle. Since sodium alginate itself has a viscosity, if it is included in a mortar composition for repairing environmentally friendly sections, When the amount of the cement is less than 1 part by weight based on 100 parts by weight of the cement, the hydrophobicity decreases. When the amount exceeds 5 parts by weight, the viscosity increases excessively.

 In another specific embodiment, the mortar composition for repairing environmentally friendly sections according to the present invention may further contain 1 to 10 parts by weight of tetraethylenepentamine (TEPA) based on 100 parts by weight of cement in order to control the viscosity and strength of the composition. If tetraethylene pentamine exceeds 1 part by weight based on 100 parts by weight of cement, the effect is insignificant. If it exceeds 10 parts by weight, excessive use of tetraethylenepentamine may adversely affect the physical properties.

In another specific embodiment, the mortar composition for repairing environmentally friendly sections according to the present invention may further comprise 1 to 10 parts by weight of a crosslinked polyacrylate salt based on 100 parts by weight of cement, wherein the crosslinked polyacrylate salt has an eco- The mortar composition is filled with voids to prevent penetration of moisture, thereby enhancing the durability of the interior. Specifically, the crosslinked polyacrylate salt is a crosslinked polyacrylate salt in which the polymer of the acrylate salt is crosslinked (C ₃ H ₄ O ₂ .C ₃ H ₃ O ₂ Na) x, which is composed of a polymer of acrylic acid and sodium acrylate containing acrylic acid as a cross-linking agent and has a crosslinked The polyacrylate salt has a three-dimensional network structure through crosslinking between polymer chains or a hydrophilic group in a single chain structure When the crosslinked polyacrylate salt is used, the polyacrylate salt swells upon infiltration of water to fill the internal voids, thereby preventing the infiltration of water and improving durability.

As another specific embodiment, the mortar composition for repairing environmentally friendly sections according to the present invention is excellent in permeation resistance to minimize permeation of moisture into the composition, so that tetraethyl orthosilicate (TEOS) is added to improve the durability of the composition. The use amount thereof is 0.1 to 5 parts by weight based on 100 parts by weight of cement.

In another specific embodiment, the mortar composition for repairing environmentally friendly sections according to the present invention rapidly accelerates the dissolution of the composition to increase the initial heat of reaction, thereby accelerating the curing hardening. In order to secure initial strength, potassium phosphate is added to cement If the amount of the cement is more than 5 parts by weight based on 100 parts by weight of the cement, it may shrink due to the breaking performance and cracks may occur. If the amount is less than 1 part by weight, the hydrolysis rate is lowered, not.

In another specific embodiment, the mortar composition for repairing an environmentally friendly section according to the present invention may further include sodium aluminate to enhance the refractory chemical resistance of the composition and to form a structure of a dense cured body during curing to exhibit high strength of the composition , And its amount is 0.1 to 3 parts by weight based on 100 parts by weight of cement.

In another specific embodiment, the mortar composition for repairing an environmentally friendly section according to the present invention comprises lithium carbonate (Li ₂ CO ₃ ) in an amount of 0.1 to 100 parts by weight based on 100 parts by weight of cement, in order to accelerate curing of the composition and improve compressive strength and flexural strength. 2 parts by weight.

In another specific embodiment, the mortar composition for repairing an environmentally friendly section according to the present invention is a mortar composition having a viscosity of 1 part by weight per 100 parts by weight of cement so as to exhibit resistance to separation of materials and excellent adhesion even when the composition is appropriately viscous, To 5 parts by weight.

In another specific embodiment, the mortar composition for repairing environmentally friendly sections according to the present invention may further contain 5 to 15 parts by weight of diethyl vinyl acetate-vinyl acetate based on 100 parts by weight of cement in order to improve the adhesive strength and durability of the composition.

In another specific embodiment, the mortar composition for repairing an environmentally friendly section according to the present invention may further comprise 1 to 3 parts by weight of sodium kosane based on 100 parts by weight of cement in order to improve the water resistance of the composition.

In another specific embodiment, the mortar composition for maintenance of environmentally friendly section according to the present invention may further contain calcium pyrophosphate to maintain the initial working performance of the composition and to improve the compressive strength, 0.1 to 2 parts by weight is preferable.

In another specific embodiment, the mortar composition for repairing an environmentally friendly section according to the present invention may further include a starch phosphate ester, which is a kind of anion-modified starch, in order to improve the absorbency, permeability and moisturizing property of the composition. And 0.1 to 2 parts by weight on the basis of 100 parts by weight.

In another specific embodiment, the mortar composition for maintenance of environmentally friendly sections according to the present invention may further include 10 to 30 parts by weight of coal tar pitch based on 100 parts by weight of cement in order to improve the waterproof performance of the composition.

In another specific embodiment, the eco-friendly section repair mortar composition according to the present invention comprises polymethylsilsesquioxane to improve the adhesion of the composition and to fill the pores of the surface to be packaged to which the mortar composition for maintenance of environmentally friendly section is applied And 1 to 5 parts by weight based on 100 parts by weight of cement.

In another specific embodiment, the mortar composition for maintenance of an environmentally friendly section of the present invention is prepared by mixing polyvinyl pyrrolidone with 100 parts by weight of cement to improve the stability of the composition by allowing the composition to be stably dispersed and absorbing and swelling the moisture. By weight, more preferably 5 to 20 parts by weight.

In another specific embodiment, in order to improve the dispersibility of the mortar composition for eco-friendly cross-section and to prevent the re-entrainment even after the composition is mixed, the composition for eco-friendly section maintenance according to the present invention is prepared by mixing sodium rosinate with 100 parts by weight of cement 1 to 3 parts by weight.

The method for constructing the mortar composition for repairing eco-friendly sections according to the present invention having the above-described structure, for example, a section repair method is not particularly limited as long as it is a method commonly used in the art. However, An example of this is as follows.

The method for constructing a mortar composition for repairing an environmentally friendly section according to the present invention, specifically the method for repairing a section, comprises a foreign matter removal-cleaning step for removing foreign substances on a reinforcing surface to be reinforced and then cleaning;

10 to 30 parts by weight of seaweed, 10 to 40 parts by weight of calcium sulfoaluminate, 3 to 8 parts by weight of silica fume, 5 to 30 parts by weight of meta-kaolin based on 100 parts by weight of cement, 5 to 20 parts by weight of methyl methacrylate, 10 to 60 parts by weight of fly ash, 1 to 10 parts by weight of polyvinyl alcohol, 5 to 30 parts by weight of curing agent, 5 to 20 parts by weight of fibers, 10 to 40 parts by weight of nanoceramic grains A mortar composition comprising 5 to 15 parts by weight of a moisture-retaining agent, 1 to 10 parts by weight of an adhesion promoter, and 0.01 to 10 parts by weight of a high-performance water reducing agent; And

And a curing step of curing the cement composition after the pouring step is completed.

Hereinafter, the present invention will be described in detail by way of examples. However, the following examples are for illustrative purposes only and are not intended to limit the scope of the present invention.

[Example 1]

Portland cement 100g, spiny palette 20g, lane Fineness is about 7,000㎠ / g level of ultrafine amorphous calcium sulfo aluminate, 30g, 5g silica fume, metakaolin 15g, methyl methacrylate 10g, fineness of about 3,500cm ² / 30 g of fly ash having a density of about 2.2 g / cm ³ , 7 g of polyvinyl alcohol, 15 g of a curing agent composed of 2-diethylaminoethylamine, 12 g of basalt fiber, 30 g of silicon carbide having an average particle diameter of about 450 nm, 10 g of hydroxyethyl acryloyl phosphate, 5 g of hydroxyethyl acryloyl phosphate, and 4 g of a high-performance water reducing agent composed of poly-monoacrylate were mixed to prepare a mortar composition for repairing environmentally friendly sections.

[Example 2]

7 g of polyacrylate was further added in the same manner as in Example 1.

[Example 3]

3 g of calcium chloride was further added in the same manner as in Example 1.

[Example 4]

5 g of sodium acid salt of sodium hydroxide was further added in the same manner as in Example 1.

[Example 5]

In the same manner as in Example 1, 40 g of steelmaking slag having a powder degree of about 3,850 cm ² / g and a density of about 3.1 g / cm ³ was further added.

[Example 6]

The procedure of Example 1 was repeated, except that 30 g of a polyurethane prepolymer was further added.

[Example 7]

Was carried out in the same manner as in Example 1 except that 5 g of a polycarboxylic acid-based smoothing agent was further added.

[Example 8]

The same procedure as in Example 1 was carried out except that 3 g of the deterioration inhibitor containing 6PPD was further added.

[Example 9]

The procedure of Example 1 was repeated, except that 4 g of aminomethyl polydimethylsiloxane was further added.

[Example 10]

10 g of octyltriethoxysilane having an average molecular weight of about 200 Da was further added in the same manner as in Example 1.

[Example 11]

The procedure of Example 1 was repeated, except that 3 g of magnesium silicate was further added.

[Example 12]

The procedure of Example 1 was repeated, except that 2 g of sodium bentonite was further added.

[Example 13]

30 g of a modified silane silicate composite prepared by mixing 1 g of aminosilane in 100 g of lithium silicate and diluting in a temperature range of about 100 캜 and stirring at a speed of about 300 rpm for about 1 hour was carried out in the same manner as in Example 1 .

[Example 14]

The procedure of Example 1 was repeated, except that 0.5 g of sodium benzoate was further added.

[Example 15]

The procedure of Example 1 was repeated, except that 3 g of sodium dodecyl stearate was further added.

[Example 16]

The procedure of Example 1 was repeated, except that 8 g of dimethyl ammonium chloride was further added.

[Example 17]

The procedure of Example 1 was repeated, except that 1 g of sodium hypochlorite was further added.

[Example 18]

The procedure of Example 1 was repeated, except that 1 g of sodium sulfate was further added.

[Example 19]

The procedure of Example 1 was repeated, except that 1 g of sodium oleate was further added.

[Example 20]

The procedure of Example 1 was repeated, except that 3 g of calcium oxide was further added.

[Example 21]

The procedure of Example 1 was repeated, except that 1 g of wetlan gum was further added.

[Example 22]

The procedure of Example 1 was repeated except that 3 g of cocobetaine was further added.

[Example 23]

The procedure of Example 1 was repeated, except that 3 g of sodium alginate was further added.

[Example 24]

The procedure of Example 1 was repeated, except that 3 g of tetraethylenepentamine was further added.

[Example 25]

The procedure of Example 1 was repeated except that 3 g of crosslinked polyacrylate salt was further added.

[Example 26]

The procedure of Example 1 was repeated, except that 3 g of tetraethylorthosilicate was further added.

[Example 27]

The procedure of Example 1 was repeated except that 3 g of potassium phosphate was added.

[Example 28]

The procedure of Example 1 was repeated, except that 1 g of sodium aluminate was further added.

[Example 29]

The procedure of Example 1 was repeated, except that 1 g of lithium carbonate was further added.

[Example 30]

The procedure of Example 1 was repeated, except that 2 g of ethylene vinyl acetate was further added.

[Example 31]

The procedure of Example 1 was repeated, except that 10 g of vinyl acetate-diethyl maleate was further added.

[Example 32]

The procedure of Example 1 was repeated, except that 2 g of sodium kosane was further added.

[Example 33]

The procedure of Example 1 was repeated, except that 1 g of calcium pyrophosphate was further added.

[Example 34]

The procedure of Example 1 was repeated, except that 1 g of starch phosphate ester was further added.

[Example 35]

The procedure of Example 1 was repeated, except that 15 g of coal tar pitch was added.

[Example 36]

The procedure of Example 1 was repeated, except that 4 g of polymethylsilsesquioxane was further added.

[Example 37]

The procedure of Example 1 was repeated, except that 7 g of polyvinylpyrrolidone was further added.

[Example 38]

The procedure of Example 1 was repeated, except that 2 g of sodium rosinate was further added.

[Example 39]

The procedure of Example 1 was repeated, except that all of Examples 2 to 38 were added.

[Experiment]

Compositions prepared according to the examples were mixed with water to prepare concrete, and mechanical properties such as degree of contaminant release, curing time, chemical curing time, and compressive strength were measured.

The results are shown in Table 1.

Pollutant release Curing time (hr) Chemical hardening time (day) Compressive strength (MPa) Example 1 none 27 8 75 Example 2 none 26 6 76 Example 3 none 24 8 78 Example 4 none 27 7 77 Example 6 none 26 8 77 Example 7 none 27 8 78 Example 8 none 26 7 76 Example 9 none 28 8 76 Example 10 none 27 8 77 Example 11 none 28 7 78 Example 12 none 28 8 76 Example 13 none 27 8 77 Example 14 none 27 7 74 Example 15 none 26 8 75 Example 16 none 25 7 77 Example 17 none 27 8 78 Example 18 none 28 7 77 Example 19 none 27 8 77 Example 20 none 26 8 76 Example 21 none 27 7 77 Example 22 none 28 7 77 Example 23 none 28 8 77 Example 24 none 27 7 76 Example 25 none 26 7 78 Example 26 none 28 8 76 Example 27 none 27 7 77 Example 28 none 26 7 77 Example 29 none 25 8 76 Example 30 none 26 6 78 Example 31 none 28 8 77 Example 32 none 26 7 78 Example 33 none 27 7 78 Example 34 none 28 7 76 Example 35 none 27 7 76 Example 36 none 28 7 76 Example 37 none 26 8 78 Example 38 none 27 8 78 Example 39 none 28 8 77

As shown in Table 1, the eco-friendly cross-section mortar composition prepared according to Examples 1 to 39 has no leaching of contaminants, is quick enough to cure in only one day, Of the respondents.

As described above, those skilled in the art will understand that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the embodiments described above are all illustrative and not restrictive. The scope of the present invention should be construed as being included in the scope of the present invention without departing from the scope of the present invention.

Claims (5)

On the basis of 100 parts by weight of cement,
10 to 30 parts by weight of seaweeds;
10 to 40 parts by weight of calcium sulfoaluminate;
3 to 8 parts by weight of silica fume;
5 to 30 parts by weight of meta-kaolin;
5 to 20 parts by weight of methyl methacrylate;
10 to 60 parts by weight of fly ash;
1 to 10 parts by weight of polyvinyl alcohol;
5 to 30 parts by weight of a curing agent;
5 to 20 parts by weight of fibers;
10 to 40 parts by weight of nano-ceramic particles;
5 to 15 parts by weight of a moisturizer;
1 to 10 parts by weight of an adhesion promoter; And
0.01 to 10 parts by weight of a high-performance water reducing agent,
Further comprising sodium benzoate in an amount of 0.1 to 1 part by weight based on 100 parts by weight of cement,
Further comprising 5 to 15 parts by weight of dimethyl ammonium chloride based on 100 parts by weight of cement,
Further comprising 0.1 to 2 parts by weight of sodium hypochlorite based on 100 parts by weight of cement,
Further comprising sodium sulfate in an amount of 0.1 to 3 parts by weight based on 100 parts by weight of cement,
Further comprising 1 to 5 parts by weight of sodium oleate based on 100 parts by weight of cement,
Further comprising calcium oxide in an amount of 1 to 5 parts by weight based on 100 parts by weight of cement,
Further comprising 0.1 to 3 parts by weight, based on 100 parts by weight of cement,
Further comprising 1 to 5 parts by weight, based on 100 parts by weight of cement,
Further comprising 0.1 to 5 parts by weight of tetraethyl orthosilicate based on 100 parts by weight of cement,
Further comprising 1 to 5 parts by weight of potassium phosphate based on 100 parts by weight of cement,
Further comprising 5 to 15 parts by weight of diethyl vinyl acetate-diethyl maleate based on 100 parts by weight of cement,
Further comprising 1 to 3 parts by weight, based on 100 parts by weight of cement,
Further comprising 0.1 to 2 parts by weight of calcium pyrophosphate based on 100 parts by weight of cement,
Further comprising 0.1 to 2 parts by weight of starch phosphate ester based on 100 parts by weight of cement,
Further comprising 10 to 30 parts by weight of a coal tar pitch based on 100 parts by weight of cement,
Further comprising 1 to 5 parts by weight of polymethylsilsesquioxane based on 100 parts by weight of cement,
Further comprising polyvinylpyrrolidone in an amount of 5 to 20 parts by weight based on 100 parts by weight of cement,
Wherein the sodium rosinate further comprises 1 to 3 parts by weight based on 100 parts by weight of cement.
delete delete delete Removing foreign matter on the reinforcement surface to be reinforced and cleaning it;
10 to 30 parts by weight of seaweed, 10 to 40 parts by weight of calcium sulfoaluminate, 3 to 8 parts by weight of silica fume, 5 to 30 parts by weight of meta-kaolin based on 100 parts by weight of cement, 5 to 20 parts by weight of methyl methacrylate, 10 to 60 parts by weight of fly ash, 1 to 10 parts by weight of polyvinyl alcohol, 5 to 30 parts by weight of curing agent, 5 to 20 parts by weight of fibers, 10 to 40 parts by weight of nanoceramic grains 0.1 to 1 part by weight of sodium benzoate per 100 parts by weight of cement is added to an environmentally friendly mortar composition for repairing an environmentally friendly section including 5 to 15 parts by weight of a water repellent, 1 to 10 parts by weight of an adhesion promoter, and 0.01 to 10 parts by weight of a high- Further comprising dimethyl ammonium chloride in an amount of 5 to 15 parts by weight based on 100 parts by weight of cement and sodium hypochlorite in an amount of 0.1 to 2 parts by weight based on 100 parts by weight of cement Further comprising sodium sulfate in an amount of 0.1 to 3 parts by weight based on 100 parts by weight of cement, wherein sodium oleate is further added in an amount of 1 to 5 parts by weight based on 100 parts by weight of cement, and calcium oxide is added in an amount of 1 To 5 parts by weight, further comprising wellan gum in an amount of 0.1 to 3 parts by weight based on 100 parts by weight of cement, and further comprising 1 to 5 parts by weight of cocoate in an amount of 1 to 5 parts by weight based on 100 parts by weight of cement, wherein tetraethylorthosilicate is cement 100 And 0.1 to 5 parts by weight on the basis of 100 parts by weight of cement based on 100 parts by weight of cement and 1 to 5 parts by weight of cement based on 100 parts by weight of diethyl vinyl acetate- And further comprising 1 to 3 parts by weight of sodium kosane as a cement based on 100 parts by weight of cement, wherein the calcium pyrophosphate is contained in an amount of 0.1 Further comprising starch phosphate ester in an amount of 0.1 to 2 parts by weight based on 100 parts by weight of cement and further comprising 10 to 30 parts by weight of a coal tar pitch based on 100 parts by weight of cement, Further comprising 5 to 20 parts by weight of polyvinylpyrrolidone based on 100 parts by weight of cement, wherein sodium rosinate is contained in an amount of 1 to 5 parts by weight based on 100 parts by weight of cement, 3 parts by weight of an eco-friendly cross-section repair mortar composition; And
And a curing step of curing the cement composition after the pouring step is completed.