KR101722390B1 - Eco-Friendly Quick-hardening Concrete Composition for Paving Bridges and Roads Using Seaweeds and Cannabis and Constructing Methods Using Thereof - Google Patents

Abstract

The present invention relates to a cement composition comprising 2 to 15 parts by weight of hemp, based on 100 parts by weight of cement; 3 to 10 parts by weight of seaweeds; 10 to 1,000 parts by weight of aggregate; 10 to 50 parts by weight of a prepolymer; 2 to 20 parts by weight of an emulsion curing agent; 10 to 30 parts by weight of calcium sulfoaluminate; 10 to 30 parts by weight of methyl methacrylate; 3 to 15 parts by weight of high-performance powder; 5 to 20 parts by weight of silicate; 1 to 10 parts by weight of a defoaming agent; 3 to 10 parts by weight of an accelerator; And 0.01 to 10 parts by weight of a high-performance water reducing agent.
The present invention provides a quick-setting concrete composition for bridges and road pavements that minimizes the effects of changes in outside air temperature and can prevent cracks, surface peeling, falloff (potholes), etc., At the same time, since the compressive strength is high, it is easy to apply to the pavement pavement.

Description

TECHNICAL FIELD The present invention relates to an eco-friendly quick-hard concrete composition for the bridge and road pavement using hemp and algae, and a construction method using the eco-friendly quick-hardening concrete composition for paving bridges and road constructions.

The present invention relates to a quick-setting concrete composition for bridging and road paving, and more particularly, to an eco-friendly quick-setting concrete composition for bridge and road pavement using hemp and algae for paving bridges and upper surfaces of roads and a construction method using the same .

Generally, as the industrial society develops, the utilization rate of the vehicles is increased. Accordingly, for the smooth communication and safety of the traffic, many bridges and roads are constructed and safety facilities for accident prevention are installed.

Particularly, as a bridge and a road pavement method used in such a road construction, asphalt pavement having a base board and a surface layer having a thickness of 2 to 10 cm or a cement concrete pavement comprising a roadbed and a concrete plate thereon are mainly made.

On the other hand, in general, bridges are collectively referred to as high-priced structures that are constructed so as to pass over the upper parts of rivers, shores, roads, and the like. Thereby forming a packaging layer.

The above-mentioned cross-pavement packaging is a part directly transmitting traffic load, and it is required not only to have strength and crack resistance suitable thereto, but also to be waterproof due to exposure to moisture such as rainwater. In particular, Low chlorine ion permeability is required in order to prevent corrosion.

Conventionally, a conventional concrete pavement method or an ascon pavement method has been widely known as such a pavement pavement method.

Here, the ascon used in the above-mentioned asphalt pavement is also referred to as a hot asphalt mixture (KS F 2349 standard), HMA (hot mix asphalt) or the like, which is a name for reducing asphalt concrete.

General Ascon is manufactured by mixing asphalt binder, aggregate, sand and filler at high temperature, and is widely used as a material for road pavement.

Especially, as a general road pavement method, asphalt pavement construction method using asphalt concrete has been mainly performed.

However, even if there is no plastic deformation problem due to plastic deformation occasionally occurring along the running track 5 years after the installation, the above-mentioned asbestos packaging is gradually aged with the passage of time, There is a problem that maintenance is required periodically due to occurrence of severe cracks. As an example of such a repair method, Korean Patent No. 0880030 discloses that 60 to 80% by weight of asphalt cement; And 15 to 35% by weight of vegetable oil; and an aliphatic polyamide (Aliphatic polyamide).

In order to minimize the cost due to the maintenance, it is required to minimize the plastic deformation of the road packed with the ascon, and to develop an ascon composition that does not easily peel off without aging for a long time.

As a bridge pavement pavement method, pavement construction method using asphalt concrete has been mainly performed. Since it is a pervious pavement, it is necessary to install a waterproof layer prior to pavement pavement to protect the bridge deck reinforced concrete. There is a problem in that additional cost is incurred because it is necessary to cut and repackage at intervals of several years.

In the case of such conventional asphalt concrete bridge pavement, the waterproof layer of the asphalt is repaired after the cutting, the waterproof function of the bridge is lost, the chloride ion penetrates into the bridge bottom plate reinforced concrete and the corrosion of the reinforcing bar is promoted. As a result, cracks are generated in the reinforced concrete, and the durability of the bridge deck concrete is deteriorated early.

In addition, asphalt concrete is a flexible pavement material and it is necessary to repackage the pavement once every 5 years on average in order to secure the necessary running ability by plastic deformation, aging, peeling, etc. Therefore, And the like.

Further, in conventional asphalt concrete, it is difficult to grasp the signs of aging of the bridge top plate, and when the construction of the waterproof layer is poor or broken, chloride penetrates into the top plate to corrode the steel bar, There is a problem that concrete is deteriorated due to repetition of repetition and freezing / thawing, thereby shortening the commonality of bridges.

SUMMARY OF THE INVENTION The present invention has been made to overcome the above-described problems, and it is an object of the present invention to provide a bridge and a road that can be used at low cost and effectively perform packaging while maximizing the characteristics of a bridge and road pavement composition by including hemp and seaweed in a quick- The present invention relates to a hard concrete composition for packaging, and an environmentally friendly concrete composition for bridge and road pavement using hemp and seaweed.

In addition, the present invention minimizes the influence of changes in ambient temperature to prevent occurrence of cracks, surface peeling, dropouts (potholes), etc., and is excellent in preventing frost formation at the beginning of winter and improving physical properties such as compressive strength And a concrete composition for road pavement.

The present invention
Based on 100 parts by weight of cement,
2 to 15 parts by weight hemp;
3 to 10 parts by weight of seaweeds;
10 to 1,000 parts by weight of aggregate;
10 to 50 parts by weight of a prepolymer;
2 to 20 parts by weight of an emulsion curing agent;
10 to 30 parts by weight of calcium sulfoaluminate;
10 to 30 parts by weight of methyl methacrylate;
3 to 15 parts by weight of high-performance powder;
5 to 20 parts by weight of silicate;
1 to 10 parts by weight of a defoaming agent;
3 to 10 parts by weight of an accelerator; And
0.01 to 10 parts by weight of a high-performance water reducing agent,
Further comprising 1 to 10 parts by weight of a smoothing agent based on 100 parts by weight of cement,
Further comprising 1 to 10 parts by weight based on 100 parts by weight of cement,
Further comprising 1 to 8 parts by weight of an amino group-containing siloxane based on 100 parts by weight of cement,
The water absorbent polymer further comprises 2 to 15 parts by weight based on 100 parts by weight of the cement,
Further comprising 5 to 20 parts by weight of octyltriethoxysilane based on 100 parts by weight of cement,
Further comprising 1 to 10 parts by weight of a crosslinked polyacrylate salt based on 100 parts by weight of cement,

And 1 to 10 parts by weight of tetraethylenepentamine based on 100 parts by weight of cement.

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In addition,
Removing the foreign object on the surface of the package to be cleaned and then cleaning the object;
2 to 15 parts by weight of hemp, 3 to 10 parts by weight of seaweed, 10 to 1,000 parts by weight of an aggregate, 10 to 50 parts by weight of a pre-polymer, 10 to 50 parts by weight of an emulsion curing agent 2 10 to 30 parts by weight of calcium sulfoaluminate, 10 to 30 parts by weight of methylmethacrylate, 3 to 15 parts by weight of high-performance powder, 5 to 20 parts by weight of silicate, 1 to 10 parts by weight of defoamer, And 0.01 to 10 parts by weight of a high-performance water reducing agent, the smoothing concrete composition further comprises 1 to 10 parts by weight of a smoothing agent based on 100 parts by weight of the cement, and the water-reducing agent is added in an amount of 1 to 10 parts by weight And the amino group-containing siloxane is further contained in an amount of 1 to 8 parts by weight based on 100 parts by weight of the cement, and the water absorbent polymer is contained in 2 parts by weight based on 100 parts by weight of the cement And 5 to 20 parts by weight of octyltriethoxysilane based on 100 parts by weight of cement. The crosslinked polyacrylate salt further comprises 1 to 10 parts by weight based on 100 parts by weight of cement, Placing a quick-setting concrete composition further comprising 1 to 10 parts by weight, based on 100 parts by weight of cement, tetraethylenepentamine mixed with water and casting; And

And a curing step of curing the quick-setting concrete composition after the pouring step is completed.

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The present invention provides a quick-setting concrete composition for bridges and road pavements that minimizes the effect of changes in outside air temperature and can prevent cracks, surface peeling, falloff (potholes), etc., At the same time, it is easy to apply to the pavement packaging because of its high compressive strength.

Hereinafter, the present invention will be described in detail.

In one aspect, the present invention provides a cement composition comprising 2 to 15 parts by weight hemp, based on 100 parts by weight of cement; 3 to 10 parts by weight of seaweeds; 10 to 1,000 parts by weight of aggregate; 10 to 50 parts by weight of a prepolymer; 2 to 20 parts by weight of an emulsion curing agent; 10 to 30 parts by weight of calcium sulfoaluminate; 10 to 30 parts by weight of methyl methacrylate; 3 to 15 parts by weight of high-performance powder; 5 to 20 parts by weight of silicate; 1 to 10 parts by weight of a defoaming agent; 3 to 10 parts by weight of an accelerator; And 0.01 to 10 parts by weight of a high-performance water reducing agent.

In another aspect, the present invention provides a method of removing foreign objects, comprising: 2 to 15 parts by weight of hemp, 3 to 10 parts by weight of seaweed, 10 to 1,000 parts by weight of an aggregate, 10 to 50 parts by weight of a pre-polymer, 10 to 50 parts by weight of an emulsion curing agent 2 10 to 30 parts by weight of calcium sulfoaluminate, 10 to 30 parts by weight of methylmethacrylate, 3 to 15 parts by weight of high-performance powder, 5 to 20 parts by weight of silicate, 1 to 10 parts by weight of defoamer, 10 parts by weight of a high-performance water reducing agent and 0.01 to 10 parts by weight of a high-performance water reducing agent is mixed with water and then poured; And a curing step of curing the quick-setting concrete composition after the pouring step is completed.

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, blast furnace slag cement, ultra fine powder cement, and other special cements.

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 quick-setting concrete composition according to the present invention, specifically the quick-setting concrete composition for bridge and road pavement, is based on 100 parts by weight of cement.

The hemp according to the present invention is contained in a quick hardening concrete composition, specifically, an environmentally friendly quick hardening concrete composition to prevent shrinkage of the quick hardening concrete composition during drying and curing, can do.

Further, when the hemp is included in the concrete composition, the strength of the hemp itself may be slightly lowered due to the fibrous properties of the hemp, but the durability of the hemp is improved and the crack is suppressed.

In addition, the hemp has a strong sound absorption ability, thereby reducing noise and providing an excellent antibacterial power.

In addition, the hemp has high flame retardancy and insect repellency to the extent that it can be used for veterinary purposes, and can be used in a concrete composition to impart antifreeze and insect repellency, and is excellent in ultraviolet ray shielding function to prevent aging of the packaging surface exposed to the outside Not only is it possible, it is good in heat insulation.

Furthermore, the hemp according to the present invention not only provides a waterproof effect by filling the pores of the pavement packed with the concrete composition, but also can prevent damage during freezing and thawing.

The hemp according to the present invention may be prepared from hemp seeds, fruit, stem, root or a mixture of at least one selected from them, or dried hemp, powdered hemp or hemp liquid, It is advisable to use solids in the form of a powder.

As a specific aspect, the hemp according to the present invention can be used in the form of a mixture of a hemp liquid, in particular a liquid concentrate and an extract-like hemp liquid, and a hemp stem mixed with the hemp stem, A hemp liquid, a hemp concentrate and a hemp extract are added in order to solve the problem.

In this case, the mixing ratio of the hemp solution and the hemp stem is not particularly limited, but preferably 10 to 90% by weight of the hemp solution and 10 to 90% by weight of the hemp stem are based on the total weight of the hemp solution and the hemp stem mixture.

On the other hand, the hemp liquid according to the present invention is a liquid obtained from hemp, for example, seed, fruit, stem, root or a mixture of at least one selected from hemp.

It is preferable that the liquid as the liquid is in the form of an extract or a concentrated liquid.

The extract includes an extract obtained by pressing the seed, fruit, stem, root or a mixture of at least one selected from the above with a pressure of at least 2 kgf / cm ² or more.

The concentrate may be obtained by mixing seed, fruit, stem, root or a mixture of at least one selected from the above with water and then purifying the mixture.

The hemp stem according to the present invention may be any conventional hemp stem, but it is recommended to use a hemp stem having a length of 0.5 to 5 cm.

If the length of the used hemp stem is less than 0.5 mm, it is troublesome to cut and use the hemp stem. If the length of the hemp stem is 5 cm or more, the workability is decreased due to the size thereof, .

Preferably, the amount of hemp used is 2 to 15 parts by weight based on 100 parts by weight of cement.

The seaweeds according to the present invention are included in an environmentally-friendly quick-setting concrete composition for bridges and road pavements, specifically for bridges and road pavements, so that shrinkage becomes large during drying and curing of the quick-setting concrete composition, So that it can be prevented from being broken easily.

Particularly, the seaweed according to the present invention increases the fluidity of the concrete due to the activity of the seaweeds independently during the concrete pouring work, increases the adhesion by forming a seaweed particle film around the cement hydrate in the hydration reaction process, So that the occurrence of cracks can be suppressed as the pores are filled with algae.

In addition, the seaweed promotes bonding between components constituting the quick-hard concrete composition and prevents cracking.

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, but it is preferable to use at least one of green algae, brown algae, red algae, or at least one of them as preferable algae.

Examples of the preferable algae include, but are not limited to, green algae include, but are not limited to, seaweed, hallaria, chrysanthemum, sea bass, parasitoids, However, the present invention is not limited thereto, and the red algae may be selected from the group consisting of red algae such as red algae, black algae, Can be used, such as bamboo, bamboo, bamboo, bamboo, bamboo, bamboo, bamboo, bamboo, bamboo, bamboo, bamboo, But is not limited thereto.

As a specific aspect, seaweeds according to the present invention may be used in the form of dried seaweeds, seaweeds in the form of powders or concentrates in concentrated form, but it is advisable to use a solid form of dried powder after being dried.

The amount of the algae to be used is preferably 3 to 10 parts by weight based on 100 parts by weight of the cement.

The aggregate according to the present invention is a construction-use mineral material that can be consolidated into a lump by a binder such as concrete, and is chemically stable.

The aggregate refers to sand, gravel, basalt, osseite, basalt and other similar materials that mix with cement and water to produce concrete for paving the pavement and pavement surfaces of roads.

Specifically, the aggregate may further include basic rock carcasses having a particle size of about 25 mm and an absorption rate of about 0.7%, and bauxite having a particle size of about 5 mm and an absorption rate of 5.40%.

The aggregate having a size of 0.074 mm or more but less than 4.76 mm is called a fine aggregate, and a material having a diameter of 4.76 mm or more is called a coarse aggregate.

The amount of the aggregate to be used is preferably 10 to 1,000 parts by weight based on 100 parts by weight of the cement. The mixing amount of the fine aggregate and the coarse aggregate contained in the aggregate is not particularly limited and can be appropriately adjusted as needed.

The prepolymer according to the present invention is a polymer resin which allows the quick-hard concrete composition to be poured on the packaging surface, for example, after being placed on the packaging surface to be packaged and then rapidly cured. As a typical prepolymer And is not particularly limited.

The preferred prepolymer is preferably a polyether polyol, a polyester polyol, a copolymer polyol, ethylene glycol, propylene glycol or a mixture of at least one selected from these.

Specifically, the prepolymer according to the present invention comprises from 25 to 30% by weight of a polyether polyol, a polyester polyol, a copolymer polyol, ethylene glycol, propylene glycol or a mixture of at least two thereof selected from the group consisting of methylene diphenyl diisocyanate 70 to 75 Based on the total weight of the 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 amount of the prepolymer used is preferably 10 to 50 parts by weight based on 100 parts by weight of the cement.

The emulsion curing agent contained in the quick-setting concrete composition according to the present invention is a curing agent having an emulsion form including castor oil, for example, castor oil and hydrogenated castor oil.

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

The castor oil is a natural oil having an iodine value of 120 or less, a hydroxyl value of 100 to 200, and an acid value of 1 or less is used, and affects the curing rate, physical and chemical performance after curing, .

The amount of the castor oil to be used may be varied depending on the amount of the solvent contained in the curing agent having an emulsion form, for example, the amount of water used or the amount of other additives, but it is preferably 20 to 80% by weight based on 100% by weight of the curing agent.

Specifically, the emulsion curing agent according to the present invention may additionally contain from 1 to 50 parts by weight, based on the total weight of the curing agent, of an additive, for example, an additive consisting of a depressant, a chain extender or a mixture of at least two selected from these. .

Herein, it is preferable that the diminution agent and / or the chain extender are those conventionally used in the art.

In one embodiment, it is preferable to use one of the dimers as trimeric acid ester, benzoic acid ester, ethylcyclohexane, 2,2,4-trimethyl-1,3-pentanediol diisobutyrate.

The chain extender may be a polyester polyol having an alkylene side chain, which is a polycondensation product of adipic acid and 2-butyl-2-ethylpropane-1,3-diol having hydroxyl groups at both ends.

The amount of the emulsion curing agent containing castor oil and / or hydrogenated castor oil according to the present invention is preferably 2 to 20 parts by weight based on 100 parts by weight of the cement constituting the quick-hard concrete composition.

The calcium sulfoaluminate according to the present invention is a material for imparting shrinkage compensation, high strength, for example, high compressive strength, bending strength and ultrahigh speed, and any of calcium sulfoaluminate having such a purpose can be used And it is recommended that the amount thereof used is 10 to 30 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 30 parts by weight, the volume may expand.

On the other hand, when the 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 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 / g.

As a specific aspect, the quick hardening concrete composition according to the present invention may further include a gypsum which can be cured by reacting with the calcium sulfoaluminate or the like for faster curing.

As the preferable gypsum, anhydrous gypsum and / or desulfurized gypsum can be used, and it is recommended to use desulfurization gypsum more preferably.

Here, the desulfurized gypsum is a gypsum produced in the desulfurization process, which is environmentally friendly since the sulfur component is excluded, and the by-product of the desulfurization process is recycled.

The amount of the gypsum used is not particularly limited, but is preferably 2 to 10 parts by weight based on the total weight of the quick-hard concrete composition.

Methyl methacrylate (MMA) according to the present invention ensures excellent adhesion of a quick-setting concrete composition, maintains excellent binder physical properties and mechanical properties, and can prevent cracks and dropouts even after rapid curing after pouring. Can be remarkably improved.

In a particular embodiment, the methylmethacrylate according to the present invention comprises from 49 to 70% by weight of a low viscosity methylmethacrylate (MMA) resin having a viscosity of from 10 to 1,000 cps and a high viscosity methyl methacrylate having a viscosity of from 2,000 to 20,000 cps 1 to 10% by weight of a mixture of at least one selected from styrene isoprene styrene (SIS), styrene butadiene rubber (SBR) and styrene butadiene styrene (SBS) is mixed with a methyl methacrylate mixture obtained by mixing 20 to 50% Modified methyl methacrylate may also be used.

When the content of SIS, SBR and / or SBS is less than 1% by weight, cracks may occur due to lowering of impact resistance at the time of charging. When the content exceeds 10% by weight, the viscosity of the modified methyl methacrylate resin Which may cause problems in workability.

The preferred amount of methyl methacrylate is 10 to 30 parts by weight based on 100 parts by weight of cement.

The high-performance powder according to the present invention serves to perform a binder function of the quick-hard concrete composition. Any high-performance powder that is commonly used in the art may be used for this purpose, but zinc powder, bentonite quartz It is preferable to use a polymer, silica, or a mixture thereof, and the amount of use is preferably 3 to 15 parts by weight based on 100 parts by weight of cement.

In addition, the particle size of the powder is not particularly limited, but it is recommended to have a particle size of several micrometers or several nanometers.

The silicate according to the present invention is intended to allow quick-setting curing of the quick-hard concrete composition. For this purpose, the silicate used in the art is not particularly limited, but preferably sodium silicate, potassium silicate or a mixture thereof And the amount thereof used is preferably 5 to 20 parts by weight based on 100 parts by weight of cement.

The antifoaming agent according to the present invention is intended to reduce an increase in the amount of air due to the generation of entrained air, and is not particularly limited as long as it is a conventional antifoaming agent of the related art.

Preferred examples of defoaming agents include mineral oil defoaming agents such as kerosene and paraffin, preservative defoaming agents such as animal and vegetable oils, sesame oil, castor oil and castor oil and their alkylene oxide adducts, oleic acid, stearic acid and alkylene oxide adducts thereof, Fatty acid ester-based antifoaming agents such as antifoaming agents, glycerin monoricinolate, alkenyl succinic acid liquid, sorbitol monolaurate, sorbitol trioleate, and natural wax, polyoxyalkylene ethers, (poly) oxyalkyl ethers, acetylene ethers, Oxyalkylene antifoaming agents such as (poly) oxyalkylene alkylphosphoric acid esters, (poly) oxyalkylene alkylamines and (poly) oxyalkylene amides, alcohol-based defoaming agents such as octyl alcohol, hexadecyl alcohol, acetylene alcohol, Amide antifoaming agents such as acrylate polyamines and the like, phosphorus tributyl phosphate, sodium octyl phosphate and the like Metal soap defoaming agents such as acid ester defoaming agents, aluminum stearate, calcium oleate, and the like; dimethyl silicone oils, silicone fats, silicone emulsions, and organic modified polysiloxanes (polyorganosiloxanes such as dimethylpolysiloxane). And silicone-based antifoaming agents such as fluorosilicone oil, etc., but is not limited thereto.

The amount of the antifoaming agent to be used is not particularly limited, but it is preferably 1 to 10 parts by weight based on 100 parts by weight of cement.

The accelerator according to the present invention serves to accelerate the initial hydration of calcium sulfoaluminate contained in the quick-hard concrete composition so that the concrete composition can exhibit early strength, and in order to increase the reaction rate of the hydration reaction will be.

The preferred accelerating agent is used in an amount of 3 to 10 parts by weight based on 100 parts by weight of cement. Examples of usable accelerators include lithium, sodium, sodium carbonate, sodium carbonate, sodium carbonate, potassium carbonate, or bicarbonate , It is recommended to use lithium carbonate (Li ₂ CO ₃ ) as a recommendation.

The high performance water reducing agent according to the present invention is an admixture used to adjust small air bubbles in concrete when the concrete is applied.

The water reducing agent is a surfactant having an excellent bubble-generating property, and generates small bubbles evenly in the concrete to improve freezing-thawing resistance, corrosion resistance, durability and the like.

In addition, the water reducing agent has a secondary effect such as facilitating the pouring operation by improving the fluidity of the quick-setting concrete composition for bridge and road pavement, lowering the thermal conductivity of hard concrete, and improving water tightness.

At this time, the reduction rate of the water reducing agent used in the quick-setting concrete composition for bridges and road pavements is generally about 10 to 15%, but the water reducing rate is 20 to 30%, which is referred to as a high performance 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.

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-

In a specific embodiment, the quick-setting concrete composition according to the present invention may further comprise a curing accelerator composed of metal salt cobalt, dimethyl acrylamide or a mixture thereof for faster curing. In this case, It is recommended that the amount used is 0.5 to 5 parts by weight based on 100 parts by weight of cement.

In another specific embodiment, the quick-setting concrete composition according to the present invention may further comprise 1 to 10 parts by weight of fibers based on 100 parts by weight of cement in order to improve the compressive strength, flexural strength and crack resistance of the mortar composition have.

The fiber may be any fiber as long as it is a conventional fiber in the art, but it is preferable to use at least one of carbon fiber, synthetic fiber, glass fiber, vinyl fiber and aramid fiber or a mixture thereof good.

In another specific embodiment, the quick-setting concrete composition according to the present invention may further comprise a retarding agent for controlling the operation time and / or the strength development rate, and the amount thereof is 0.05 to 2 parts by weight based on 100 parts by weight of cement I recommend you.

Preferred as the retarder is a carboxylic acid such as tartaric acid, citric acid, gluconic acid, or a salt thereof, or a mixture of at least one selected from these.

In another specific embodiment, the quick hardening concrete composition 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 quick-setting concrete composition according to the present invention may further comprise 1 to 10 parts by weight of a coagulation retardant based on 100 parts by weight of the cement.

The above-mentioned coagulation retarder is intended to prevent the loss of the coagulation performance by rapidly reacting the calcium sulfoaluminate constituting the quick-hard concrete composition with water and accelerating the hydration rate so as to prevent the coagulation performance from being lost. , It is preferable to use organic acids such as citric acid, gluconic acid, boric acid, tartaric acid and the like, and organic acid salts such as sodium citrate and sodium gluconate, and more preferably to use sodium citrate It is good.

In another specific embodiment, the quick-setting concrete composition according to the present invention may further comprise 1 to 10 parts by weight of a water reducing agent based on 100 parts by weight of cement.

At this time, the waterproofing agent prevents shrinkage of the quick-hard concrete composition.

A preferable low-shrinkage agent is not particularly limited, but it is preferable to use a polyester-based water-reducing agent and a water-reducing agent composed of an unsaturated polyester resin in particular.

In another specific embodiment, the quick-setting concrete composition 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 quick-hard concrete composition, and any conventional deterioration inhibitor in the art having such a purpose may be used.

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

The accelerated deterioration action of the concrete composition due to the oxidative action of ozone radicals activated in water, including 1,4-dimethylpentyl-p-phenylenediamino) -1,3,5-triazine, The double bond portion of the aromatic ring compound macromolecule is offset with the ozone radical activated by the free electron transfer phenomenon, so that deterioration prevention and deterioration of the concrete composition can be delayed.

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.

As another specific embodiment, the quick hardening concrete composition according to the present invention is characterized in that an aminofunctional siloxane is added to effectively cure at room temperature and to provide improved properties such as heat resistance, low temperature performance, chemical resistance, solvent resistance and oil resistance .

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 quick-setting concrete composition according to the present invention may further include an absorbent polymer which is excellent in workability by absorbing water when mixing concrete composition, .

The water absorbent polymer may be at least one selected from the group consisting of a polyacrylate salt and a derivative thereof and a polyethylene oxide derivative. The amount of the water absorbent polymer is preferably 2 to 15 parts by weight based on 100 parts by weight of the cement.

In another specific embodiment, the quick-setting concrete composition according to the present invention may further contain octyltriethoxysilane to improve adhesion and adhesion strength of the concrete 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 thereof is 5 to 20 parts by weight based on 100 parts by weight of cement I recommend you.

In another embodiment, the quick-setting concrete composition 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 in order to prevent moisture penetration and improve durability.

When the moisture permeates into the concrete composition, the crosslinked polyacrylate salt expands due to moisture to fill the pores in the concrete composition, thereby preventing the penetration of moisture, thereby enhancing the durability of the interior of the concrete composition .

More specifically, the crosslinked polyacrylate salt is a crosslinked material of a polymer of an acrylate salt, and a crosslinking agent is a copolymer of acrylic acid and sodium acrylate containing acrylic acid, be made by the following _{(C 3 H4O 2 .C 3 H} 3 O 2 Na) has a molecular formula of x.

The crosslinked polyacrylate salt having the above structure can be obtained by crosslinking a polyacrylate salt in a concrete composition according to the introduction of a hydrophilic group in a three-dimensional network structure or a single-chain structure through cross-linking between polymer chains , It expands upon permeation of water to fill the internal voids of the concrete composition, thereby preventing the penetration of moisture and enhancing durability.

In another specific embodiment, the quick-setting concrete composition according to the present invention may further comprise 1 to 10 parts by weight of tetraethylenepentamine (TEPA) based on 100 parts by weight of cement for viscosity control and strength enhancement. Tetraethylenepentamine is a kind of polyamines which serves to increase the strength of the concrete composition through curing and viscosity control of the concrete composition and is used in an amount of 1 to 10 parts by weight based on 100 parts by weight of cement, If the amount is more than 10 parts by weight, an excess amount thereof may adversely affect the physical properties inherent to the concrete composition.

A method of constructing a quick-setting concrete composition for bridge and road pavement according to the present invention having the above-described structure, and a quick-setting concrete composition for environmentally friendly bridges and road paving using seaweeds will be described as follows.

Here, the method of applying the quick-setting concrete composition for bridge and road pavement is not particularly limited, but preferably includes a foreign matter removal-cleaning step of removing foreign matter on the surface to be packaged and cleaning the foreign matter.

2 to 15 parts by weight of hemp, 3 to 10 parts by weight of seaweed, 10 to 1,000 parts by weight of an aggregate, 10 to 50 parts by weight of a pre-polymer, 10 to 50 parts by weight of an emulsion curing agent 2 10 to 30 parts by weight of calcium sulfoaluminate, 10 to 30 parts by weight of methylmethacrylate, 3 to 15 parts by weight of high-performance powder, 5 to 20 parts by weight of silicate, 1 to 10 parts by weight of defoamer, 10 parts by weight of a high-performance water reducing agent and 0.01 to 10 parts by weight of a high-performance water reducing agent is mixed with water and then poured; And

And a curing step of curing the quick-hard concrete 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]

100 g of portland cement, 7 g of cannabis stem having an average length of 3 cm, 5 g of visa parasol, 300 g of coarse aggregate, 25 g of polyether polyol, 10 g of castor oil, 15 g of calcium sulfoaluminate, 15 g of methyl methacrylate, 7 g of zinc powder, 5 g of glycerin monoricinolate, 5 g of lithium carbonate and 2 g of a high-performance water reducing agent containing poly-monomethacrylate were mixed to prepare a quick-setting concrete composition.

[Example 2]

The same procedure as in Example 1 was carried out except that 7 g of hemp seed and 7 g of powder prepared by drying the stem were used instead of 7 g of hemp stem having an average length of 3 cm.

[Example 3]

The same procedure as in Example 1 was carried out except that 1 g of Chamaecyparis obtusa, 1 g of marigolds, 1 g of mugwort, 1 g of salt weekly and 1 g of ganoderma lucidum were used instead of 5 g of barnyardgrass.

[Example 4]

The procedure of Example 1 was repeated except that 25 g of polyurethane prepolymer was used instead of 25 g of polyether polyol.

[Example 5]

Except that 10 g of castor oil was replaced by 8 g of hydrogenated castor oil and 2 g of a polyester polyol having an alkylene side chain in the same manner as in Example 1.

[Example 6]

The procedure of Example 1 was repeated except that 10 g of castor oil was replaced by 7 g of hydrogenated castor oil and 3 g of dimer containing trimeric acid ester.

[Example 7]

The same procedure as in Example 1 was followed except that 3 g of dimethyl acrylamide was further added to prepare a quick hard concrete composition.

[Example 8]

The same procedure as in Example 1 was carried out except that 5 g of carbon fiber was further added to prepare a quick hard concrete composition.

[Example 9]

The procedure of Example 1 was repeated except that 5 g of tartaric acid was further added to prepare a quick-setting concrete composition.

[Example 10]

The same procedure as in Example 1 was carried out except that 5 g of amino group-containing siloxane was further added to prepare a concrete composition.

[Example 11]

The concrete composition was prepared in the same manner as in Example 1 except that 10 g of polyacrylate was further added.

[Example 12]

The same procedure as in Example 1 was followed except that 10 g of octyltriethoxysilane was further added to prepare a concrete composition.

[Example 13]

The concrete composition was prepared in the same manner as in Example 1 except that 5 g of the crosslinked polyacrylate salt was further added.

[Example 14]

The concrete composition was prepared in the same manner as in Example 1 except that 4 g of tetraethylenepentamine (TEPA) was further added.

[Comparative Example 1]

The same procedure as in Example 1 was carried out except that 7 g of hemp stem and 5 g of barnyardgrass were excluded.

[Comparative Example 2]

The procedure of Example 1 was repeated except that 15 g of calcium sulfoaluminate was excluded.

[Comparative Example 3]

The procedure of Example 1 was repeated except that 15 g of methyl methacrylate was excluded.

[Experiment]

Table 1 shows the curing time, the chemical hardening time, the peelability, the compressive strength, and the shrinkage ratio in the low temperature condition and the standard state after the concrete was prepared by mixing the composition prepared according to the examples with water.

The compressive strength was measured by using a concrete compressive strength tester. Dry shrinkage (micron) was measured by comparing the shrinkage of each concrete composition with the comparator method for 26 weeks of specimens stored at 20% RH The drying shrinkage ratio was obtained. The smaller this value, the smaller the drying shrinkage.

Curing time (hr) Chemical curing time (days) Peelability Dry shrinkage () Compressive strength (MPa) 3 days 7 days 28 days Example 1 22 7 Peeling off 175 23.1 31.3 75 Example 2 23 7 Peeling off 181 25.2 32.5 76 Example 3 23 7 Peeling off 179 24.7 31.5 76 Example 4 22 8 Peeling off 181 26.2 30.2 76 Example 5 23 7 Peeling off 163 26.1 33.3 78 Example 6 24 7 Peeling off 181 26.3 33.2 79 Example 7 19 6 Peeling off 180 25.2 31.3 76 Example 8 26 8 Peeling off 181 29.1 36.3 81 Example 9 24 7 Peeling off 178 23.2 29.3 77 Example 10 23 8 Peeling off 143 23.4 30.1 76 Example 11 18 6 Peeling off 180 25.2 30.3 75 Example 12 25 8 Peeling off 182 28.1 34.3 80 Example 13 24 7 Peeling off 176 24.2 28.3 78 Example 14 23 8 Peeling off 153 23.4 31.1 76 Comparative Example 1 28 9 Slight peeling 142 22.1 26.3 72 Comparative Example 2 27 9 Exfoliation 141 22.2 25.3 73 Comparative Example 3 28 9 Slight peeling 142 21.4 26.1 71

As shown in Table 1, the curing time, the chemical hardening time, the adhesion and the peelability of Examples 1 to 14 using the quick-setting concrete composition for bridge and road pavement were good, and the compressive strength was high at 28 days It was confirmed that all of the concrete compositions of the present invention had a high strength of 75 megapascals or more.

Further, as shown in Comparative Examples 1 to 3, when the seaweeds or the polymer resin were not used, the curing time, the chemical hardening time, the adhesion and the peelability were not good as compared with the examples, The shrinkage rate was not good.

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 spirit and scope of the present invention as defined by the appended claims and their equivalents.

Claims (5)

Based on 100 parts by weight of cement,
2 to 15 parts by weight hemp;
3 to 10 parts by weight of seaweeds;
10 to 1,000 parts by weight of aggregate;
10 to 50 parts by weight of a prepolymer;
2 to 20 parts by weight of an emulsion curing agent;
10 to 30 parts by weight of calcium sulfoaluminate;
10 to 30 parts by weight of methyl methacrylate;
3 to 15 parts by weight of high-performance powder;
5 to 20 parts by weight of silicate;
1 to 10 parts by weight of a defoaming agent;
3 to 10 parts by weight of an accelerator; And
0.01 to 10 parts by weight of a high-performance water reducing agent,
Further comprising 1 to 10 parts by weight of a smoothing agent based on 100 parts by weight of cement,
Further comprising 1 to 10 parts by weight based on 100 parts by weight of cement,
Further comprising 1 to 8 parts by weight of an amino group-containing siloxane based on 100 parts by weight of cement,
The water absorbent polymer further comprises 2 to 15 parts by weight based on 100 parts by weight of the cement,
Further comprising 5 to 20 parts by weight of octyltriethoxysilane based on 100 parts by weight of cement,
Further comprising 1 to 10 parts by weight of a crosslinked polyacrylate salt based on 100 parts by weight of cement,
And 1 to 10 parts by weight of tetraethylenepentamine based on 100 parts by weight of cement. The method according to claim 1,
Wherein the hemp comprises seed, fruit, stem, root or a mixture of at least one selected from hemp. The method according to claim 1,
The above-mentioned algae can be used in a variety of seaweeds, such as barnyardgrass, hallaria, chrysanthemum, hermit crab, hearing, beard, beard, jade, salt, seaweed, kelp, , Ginseng mushroom, cow mushroom, mulberry horn, horny mushroom, mulberry, chrysanthemum, chestnut, mugwort, chrysanthemum, kotoni, dog gambling, round starch, , Gravel, short-timber, rock sand, gypsum, ginori, or a mixture of at least one selected from the foregoing.
The method according to claim 1,
Wherein the prepolymer comprises a polyether polyol, a polyester polyol, a copolymer polyol, ethylene glycol, propylene glycol or a mixture of at least one selected from the foregoing.
Removing the foreign object on the surface of the package to be cleaned and then cleaning the object;
2 to 15 parts by weight of hemp, 3 to 10 parts by weight of seaweed, 10 to 1,000 parts by weight of an aggregate, 10 to 50 parts by weight of a pre-polymer, 10 to 50 parts by weight of an emulsion curing agent 2 10 to 30 parts by weight of calcium sulfoaluminate, 10 to 30 parts by weight of methylmethacrylate, 3 to 15 parts by weight of high-performance powder, 5 to 20 parts by weight of silicate, 1 to 10 parts by weight of defoamer, And 0.01 to 10 parts by weight of a high-performance water reducing agent, the smoothing concrete composition further comprises 1 to 10 parts by weight of a smoothing agent based on 100 parts by weight of the cement, and the water-reducing agent is added in an amount of 1 to 10 parts by weight And the amino group-containing siloxane is further contained in an amount of 1 to 8 parts by weight based on 100 parts by weight of the cement, and the water absorbent polymer is contained in 2 parts by weight based on 100 parts by weight of the cement And 5 to 20 parts by weight of octyltriethoxysilane based on 100 parts by weight of cement. The crosslinked polyacrylate salt further comprises 1 to 10 parts by weight based on 100 parts by weight of cement, Placing a quick-setting concrete composition further comprising 1 to 10 parts by weight, based on 100 parts by weight of cement, tetraethylenepentamine mixed with water and casting; And
And a curing step of curing the quick-setting concrete composition after the pouring step is completed.