KR101607648B1 - Mortar for joint of inclined road - Google Patents

Abstract

The present invention relates to mortar constructed in a joint of an inclined road, an underpass, a tunnel, a bridge, or the like. Specifically, the present invention relates to mortar for a joint on an inclined road, which facilitates the construction of mortar on an inclined road by improving the fluidity of the mortar before the mortar is hardened, as the mortar contains a polymer fiber coated with organic and inorganic mixed polymer. The mortar is formed since a filling material such as Portland cement, fly ash, blast furnace slag powder, pozzolan powder, or calcium carbonate powder is mixed with a solvent. Moreover, the mortar can secure impact resistance and wear resistance on external force of a driving vehicle, which is applied to a joint of a road when the mortar is constructed in the joint on the road. The mortar can be easily constructed in the joint of the inclined road since the fluidity of the mortar is reduced by the polymer fiber coated with the organic and inorganic mixed polymer.

Description

{Mortar for joint inclined road}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mortar to be installed in a connecting portion such as a sloping road, an underground driveway, a tunnel or a bridge, and more particularly to a mortar for a portland cement, a fly ash, a blast furnace slag powder, Inorganic composite polymer coated on the mortar mixed with a filler and a solvent such as calcium powder and the like so as to reduce the fluidity before the mortar is cured so as to facilitate the mortar construction on the inclined running surface The present invention relates to a mortar for use in a connecting portion.

In general, deformation stress due to various causes such as temperature change, creep, shrinkage, construction error, load load, settlement of ground, etc. acts on roads, underground roads, tunnels or bridges, In order to cope with stress, a connecting portion is formed at a predetermined distance, and the connecting portion is provided with a stretching device.

Mortar or concrete using quick-setting cement, mortar using magnesia-phosphoric acid cement, epoxy resin mortar, asphalt mortar, etc. are used for the fastening of the above expansion device in order to open traffic quickly.

However, the fixing material such as the mortar or concrete of the above type is damaged or worn due to the influence of the load of the running vehicle, impact of the vibration or the like, or the interface detachment at the interface portion between the fixing material and the base surface, side surface, The waterproof property is deteriorated. In addition, when the fixing material is broken and scattered, there is a possibility of causing a traffic accident. Therefore, it is necessary to repair it periodically.

Further, in the repair work, it is necessary to shut off the traffic entirely or partially shut off at a low-traffic nighttime, so that the traffic can be opened early.

The following is a representative prior art for mortar for connecting parts of roads.

(A) 10 to 20 parts by weight of a mixture of isocyanate, polyol and additives, (B) 5 to 15 parts by weight of a filler And (C) 65 to 85 parts by weight of an aggregate, characterized by having an elastic recovery performance of 70% or more as measured by a method according to ASTM D 695 under a load of 5% And a polyurethane resin mortar.

Further, since the above-mentioned prior art is excellent in fluidity, it can be filled up to every corner of the connecting device and the filling position, and after the curing, excellent effect of adhesion with concrete, asphalt, impact resistance and abrasion resistance can be obtained. There is a problem that the mortar before curing is continuously flowed down to the lower slope when it is applied to a connecting portion such as a sloping road, an underground driveway, a tunnel or a bridge. In fact.

1. Korean Registered Patent No. 10-0655227 (Dec. 1, 2006) 2. Korean Patent Publication No. 10-2007-0121382 (December 27, 2007) 3. Korean Patent Publication No. 10-2005-0120889 (December 26, 2005) 4. KOKAI Publication No. 10-2011-0119899 (November 23, 2011)

The present invention relates to a mortar for connecting parts of a road, and a mortar for a connecting part of a road in the past is a part of a joint part of a concrete road or an asphalt material, Impact and abrasion resistance are excellent, but the fluidity before curing is high, so that it is difficult to apply to the connection part of inclined roads;

In order to apply conventional mortar to a sloped road, a problem has arisen that the operator must continually push up the mortar flowing toward the lower slope until the mortar hardens to a certain extent;

The running surface of the road connection portion is not flat with the running surface of the road due to the hardened mortar projecting to the lower slope side, resulting in a problem that the driving ability of the traveling vehicle is lowered;

It is a main object of the present invention to provide a solution to such a problem that an external force of the traveling vehicle is constantly applied to the protruded portion of the mortar constructed and the connecting portion of the road is easily broken.

The present invention has been made to solve the above-

Claims [1] A mortar for a connecting portion on an inclined surface comprising polymer fiber coated with organic / inorganic hybrid polymer, a filler and a solvent;

The organic / inorganic hybrid polymer may include 50 to 60% by weight of polyvinylidene fluoride-co-hexafluoropropylene (PVDF-HFP) and 40 to 50% by weight of tetraethoxysilane (TEOS) % By weight based on the total weight of the mortar.

The mortar for connecting portion of the inclined road according to the present invention can secure the impact resistance and wear resistance against the external force of the traveling vehicle applied to the connecting portion of the road in a state where it is installed in the connecting portion of the road, The fluidity of the mortar is reduced by the polymer fiber coated with the inorganic hybrid polymer, and the effect that the mortar can be easily applied to the connecting portion of the inclined road can be obtained;

The mortar does not flow to the lower slope before the mortar applied to the connecting portion of the inclined road is hardened, so that the post-treatment effect of the operator is not required;

The road surface of the hardened mortar is not protruded from the running surface of the sloping road and has the same gradient so that the impact on the running vehicle due to the protruding portion is not applied;

It is possible to obtain an effect that the connection portion of the mortar to be constructed is not easily broken by the external force of the traveling vehicle.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a partial cross-sectional view showing a slope road in which a mortar for connecting part to a slope according to the present invention is applied.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mortar to be installed in a connecting portion such as a sloping road, an underground roadway, a tunnel or a bridge, and more particularly to a mortar comprising a polymer fiber coated with an organic / inorganic hybrid polymer, Lt; RTI ID = 0.0 > mortar. ≪ / RTI >

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described more fully hereinafter with reference to the accompanying drawings, in which preferred embodiments of the invention are shown.

First, the mortar according to the present invention is applied to the connecting portion by the inclination.

In addition, the mortar for the connecting part according to the present invention is a polymer fiber coated with an organic / inorganic hybrid polymer which reduces the fluidity of a flowable mortar when the main filler is cured in a solvent such as water fiber is included in the mixture of the filler and water.

In addition, the mixture of the above-mentioned composition may further include an elastic material so that the mortar according to the present invention can have a certain elastic force after being applied to the connecting portion of the slope and cured, and in order to improve the physical strength of the hardened mortar, . A detailed explanation will be given below.

Specifically, the filler may be composed of any one or more of Portland cement, fly ash, blast furnace slag powder, pozzolan powder or calcium carbonate powder, and may be mixed with a solvent such as water or a common organic solvent It is made into a viscous mortar form and then hardened to solid form.

At this time, the solvent may be of various kinds as long as it is for hydration reaction with the filler, and when the liquid elastomer described below is included in the mortar, the elastic material may be substituted for the solvent. A detailed explanation will be given below.

In addition, the polymer fibers are included in a mixture prepared by mixing a filler in a solvent, thereby alleviating the flowability of the prepared mortar. Various types of polymer fibers may be used as long as they are in the form of solid polymer fibers, It is preferable to use a material obtained by fiberizing at least one of polyamide, polyester, acrylonitrile, polyvinyl alcohol, polyvinyl chloride, polyvinylidene chloride, polypropylene, polyethylene or polyurethane.

At this time, the polymer fibers of this kind are included in the mortar composed of the filler and the solvent, so that the physical and chemical properties of the mortar are not impaired and the fluidity of the mortar is reduced.

However, when the filler is composed of at least one of Portland cement, fly ash, blast furnace slag powder, pozzolan powder or calcium carbonate powder, the composition ratio of the polymer fibers contained in the mortar is preferably 1 / 3, there is a problem that the physical strength of the prepared mortar drops sharply. Therefore, it is preferable that the composition ratio of the polymer fibers does not exceed 1/3 of the weight of the filler.

In connection with the above, when the polymer fiber is mixed with the filler and the solvent, the organic-inorganic hybrid polymer coated on the polymer fiber can ensure both the dispersibility of the polymer fiber in the filler as the inorganic material and the dispersibility in the solvent as the organic material (Thermal resistance to geothermal heat in summer) and chemical resistance (chemical resistance against pollutants flowing on the road), thereby improving the durability of the polymer fiber, which is an organic material contained in the mortar, As a result, it is possible to prevent breakage of the hardened mortar by being applied to the connecting portion of the slope, which may occur secondarily due to the damage of the polymer fiber.

That is, various types of organic / inorganic hybrid polymer coated on the surface of the polymer fiber can be used, and more preferably polyvinylidene fluoride-co-hexafluoropropylene (PVDF- HFP] and 40 to 50% by weight of tetraethoxysilane (TEOS) are mixed with each other.

At this time, the organic / inorganic hybrid polymer having the above structure has a lattice structure of poly (vinylidene fluoride) -cohexafluoropropylene, which is an organic material, and a Si-OH group, which is an inorganic material, and has a state excellent in heat resistance and chemical resistance.

Also, polyvinylidene fluoride co-hexafluoropropylene has excellent heat resistance that can withstand a long period of time at a temperature of about 260 DEG C or more, and a liquid (acid rain or snow containing contaminants) having an acidic or basic chemical bond, , And exhibits an effect that tetraethoxysilane, which is an inorganic material, and filler (or aggregate) can be strongly bonded to each other in the state of being made of organic / inorganic hybrid polymer.

In addition, tetraethoxysilane is excellent in heat resistance and chemical resistance due to its physical and chemical properties inherent to silica, including silica, to some extent, and has a lattice structure with polyvinylidene fluoride co-hexafluoropropylene In the bonded state, the organic and inorganic hybrid polymer is formed in a more stable state.

In addition, tetraethoxysilane exhibits the effect of strongly bonding polyvinylidene fluoride-co-hexafluoropropylene, which is an organic material, with filler (or aggregate), which is an inorganic substance, in the state of being made of an organic-inorganic hybrid polymer.

At this time, in the organic-inorganic hybrid polymer made of polyvinylidene fluoride co-hexafluoropropylene and tetraethoxysilane, if the composition ratio of tetraethoxysilane exceeds 50 wt%, the lattice structure is rather broken It is preferable that the composition ratio of the tetraethoxysilane contained in the organic-inorganic hybrid polymer does not exceed 50% by weight because the physical strength and chemical resistance are rather lowered.

The organic-inorganic hybrid polymer is prepared by dissolving 15 to 25% by weight of polyvinylidene fluoride-co-hexafluoropropylene in 75 to 85% by weight of dimethylacetamide to prepare an organic polymer solution, adding tetraethoxysilane % Of ethanol was dissolved in 55 to 65 wt% of tetraethoxysilane solution to prepare a solution of an inorganic polymer solution obtained by hydrolyzing 2 to 5 times of the weight of tetraethoxysilane solution, and then the organic polymer solution was mixed with 50 to 60 wt% By weight and 40 to 50% by weight of an inorganic polymer solution.

In order to accelerate the hydrolysis of the tetraethoxysilane by the distilled water, the inorganic polymer solution may be prepared by further mixing 0.03 to 0.3 times the weight of the tetraethoxysilane solution with hydrochloric acid.

In addition, the method of coating the organic / inorganic hybrid polymer having the above structure on the polymer fiber may be a spray coating method in which organic / inorganic hybrid polymer is sprayed onto the polymer fiber, or a spray coating method in which the liquid organic / inorganic hybrid polymer is mixed with the solid polymer fiber Followed by stirring and coating.

In this case, the polymer fiber coated with the organic-inorganic hybrid polymer by the spray coating method or the stirring coating method may be mixed with the filler and the solvent after the organic-inorganic hybrid polymer is cured, or may be mixed before the organic- To the filler and the solvent.

That is, the polymer fiber coated with the organic-inorganic hybrid polymer may be pre-processed to be mixed with the filler and the solvent in a state that the organic-inorganic hybrid polymer is cured, and when the mortar according to the present invention is applied to the connection portion by the inclination, Inorganic hybrid polymer may be coated on the polymer fiber.

At this time, the coating thickness of the organic-inorganic hybrid polymer coated on the polymer fiber can be freely adjusted according to the judgment of a person skilled in the art. However, if the coating thickness is too thin, coating is difficult, and if the coating thickness is too thick, It is preferable to have a thickness of 100 to 400 탆 in order to facilitate the coating and prevent the peeling phenomenon.

In addition, the polymer fiber coated with the organic / inorganic hybrid polymer may be mixed with the mortar according to the present invention together with the filler and the solvent, and the ionic polymer material may be added to the surface of the coating layer formed by the organic- May be further coated.

That is, when the ionic material is contained in the filler or the solvent or when the filler is mixed in the solvent to produce the ionic material, the polymeric fiber coated with the organic / inorganic hybrid polymer having the above- Can not be easily dispersed.

On the other hand, the ionic polymer material may form an ionic polymer material layer on the surface of the coating layer formed by the organic-inorganic hybrid polymer, thereby improving the dispersibility of the polymer fiber in the mixture of the filler and the solvent.

Specifically, when a cationic material is contained in a filler or a solvent, or when a filler is mixed in a solvent to produce a cationic material, a person skilled in the art will understand that an anionic polymer material can be coated on a coating layer Inorganic hybrid polymer layer ") to induce attractive force between the polymer fiber and the cationic material to improve the dispersibility of the polymer fiber; In contrast, when an anionic material is contained in a filler or a solvent or a filler is mixed in a solvent to produce an anionic material, a person skilled in the art can coat a cationic polymer material on the organic / inorganic hybrid polymer layer to form a polymer fiber and an anionic The attraction force between the materials can be induced to improve the dispersibility of the polymer fibers.

The ionic polymer material may be any material that is firmly coated on the surface of the organic-inorganic hybrid polymer layer and can exhibit constant ionicity continuously. In the present invention, the ionic polymer material may be polyacrylic acid ) Or PDMA-ECHEDA (poly (dimethylamine-co-epishlorohydrin-co-ethylenediamine)).

That is, the PAA is an ionic polymer material having an anionic property and more preferably an average molecular weight of 15,000 to 250,000 Da. At this time, the PAA is excellent in the coating power against the surface of the organic-inorganic hybrid polymer layer as the polymer acrylic acid.

In addition, when the average molecular weight of PAA is less than 15,000 Da, the molecular weight of PAA is excessively light, resulting in a problem that the coating power on the organic-inorganic hybrid polymer layer becomes insufficient. When the average molecular weight exceeds 250,000 Da, the coating power But the process for coating PAA on the surface of the organic / inorganic hybrid polymer layer becomes difficult. Therefore, it is preferable to use those having an average molecular weight within the above range.

In connection with the above, the PAA of the present invention may be dissolved in sodium salt solution to obtain a certain viscosity.

The PDMA-ECH-EDA is a cationic ionic polymer material having an average molecular weight of 75,000 to 250,000 Da. At this time, PDMA-ECH-EDA has an excellent coating power on the surface of the organic-inorganic hybrid polymer layer.

When the molecular weight of PDMA-ECH-EDA is less than 75,000 Da, the molecular weight of PDMA-ECH-EDA is excessively light, resulting in a problem that the coating power for the organic-inorganic hybrid polymer layer becomes insufficient. When the molecular weight exceeds 250,000 Da, There is a problem that the process for coating PDMA-ECH-EDA on the surface of the organic / inorganic hybrid polymer layer becomes difficult, and therefore, those having an average molecular weight within the above range are used .

The coating thickness of the ionic polymer material coated on the organic-inorganic hybrid polymer layer is preferably 1 to 20 占 퐉. If the thickness of the ionic polymer material is less than 1 占 퐉, the coating thickness is too thin. There is a problem that the electrostatic repulsion force due to the ionization due to the substance or the degree of attraction may become insufficient. When the coating thickness exceeds 20 탆, the coating thickness is too thick, so that the ionic polymer substance is not formed on the surface of the organic / inorganic hybrid polymer layer It is preferable to coat the surface of the organic-inorganic hybrid polymer layer with a coating thickness within the above range

Further, the method of coating the surface of the organic-inorganic hybrid polymer layer with the ionic polymer material can be carried out by various methods, and more preferably, the ionic polymer material solution, in which the ionic polymer material is dissolved at a predetermined concentration, A coating step of maintaining the temperature of 30 DEG C and immersing the polymer fiber having the organic-inorganic hybrid polymer layer formed therein in the ionic polymer material solution for 20 to 28 hours; Drying the coated polymer fibers at a temperature of 20 to 30 DEG C for 20 to 28 hours; And a washing step of washing the polymer fibers treated with the ultrapure water until the dried polymer fibers become equal to the pH of the ultrapure water.

According to the type of the ionic polymer material used in the coating step, those skilled in the art can variously apply the concentration and the solvent of the ionic polymer material solution. However, when the ionic polymer material is composed of PAA or PDMA-ECH-EDA , It is preferable to use water as a solvent for the ionic polymer material solution. When the ionic polymer material is PAA, it has a concentration of 0.05 to 1.0 mM. When the ionic polymer material is PDMA-ECH-EDA, It is preferable to form an ionic polymer material solution so as to have a concentration of 1.0 mM.

Specifically, when the concentration of PAA contained in the ionic polymer solution is less than 0.05 mM, the concentration of PAA is excessively low, so that the PAA has a desired thickness on the surface of the organic-inorganic hybrid polymer layer and can not be coated. If the concentration is more than mM, the concentration may be excessively high, which may cause a problem that the PAA is coated on the surface of the organic / inorganic hybrid polymer layer to an excessively large thickness. Therefore, it is preferable to maintain the concentration within the above range.

When the concentration of PDMA-ECH-EDA contained in the ionic polymer solution is also less than 0.05 mM, the concentration of PDMA-ECH-EDA is excessively low, so that PDMA-ECH-EDA has a desirable thickness There is a problem that PDMA-ECH-EDA is coated on the surface of the organic-inorganic hybrid polymer layer excessively because the concentration is excessively high if it has a concentration exceeding 1.0 mM, It is preferable to maintain the concentration in the atmosphere.

In connection with the above, when the temperature of the ionic polymer solution at the coating step is less than 20 ° C, the degree of activation of PAA or PDMA-ECH-EDA is insufficient, and the treatment time of the coating step is excessively longer than 28 hours And the molecular structure of PAA or PDMA-ECH-EDA may be deformed. However, when the temperature exceeds 30 ° C, the degree of activation of PAA or PDMA-ECH-EDA is excellent, Is preferably maintained within the range of 20 to 30 DEG C and the immersion time of the polymer fiber in which the organic / inorganic hybrid polymer layer is formed in the ionic polymer solution in the temperature range is 20 to 28 hours desirable.

In addition, the drying step is a treatment process of drying the polymer fiber having the coated organic-inorganic hybrid polymer layer formed thereon at a temperature of 20 to 30 ° C for 20 to 28 hours, This is a process for stably fixing a macromolecular substance.

At this time, it is preferable that the treatment temperature of the drying step is applied to the same temperature as the treatment during the coating step as much as possible.

That is, when the temperature during the drying step is higher than 30 ° C, the temperature is excessively high, so that the ionic polymer material layer coated on the surface of the organic-inorganic hybrid polymer layer may be dried and cracked. There arises a problem that the time is excessively long and the productivity is lowered. Therefore, it is desirable to maintain the temperature at 20 to 30 占 폚. In connection with the above, the drying step in the temperature range is configured to have a drying step processing time of 20 to 28 hours in association with the processing temperature.

The present invention further comprises a washing step of washing the polymer fiber having the ionic polymer layer formed by the drying step with ultrapure water so that the ionic polymer material coated on the surface of the polymer fiber is weakly So that the ionic polymer material particles which may be adhered thereto can be cleaned.

The washing step may be unprocessed, but when the washing step is performed, the ionic polymer material particles that are weakly fixed to the outer surface of the ionic polymer material are removed as ultrapure water, It is possible to obtain an effect to be able to be made.

In addition, the mortar for the connection part according to the present invention may comprise 1 to 5% by weight of a polymer fiber coated with an organic / inorganic hybrid polymer; 5 to 15% by weight of a filler of at least one of Portland cement, fly ash, blast furnace slag powder, pozzolan powder or calcium carbonate powder; 10 to 20% by weight of an elastomer mixed with an isocyanate, a polyol and an additive; And 65 to 80% by weight of an aggregate.

At this time, the polymer fiber coated with the organic / inorganic hybrid polymer and the filler will be described in detail.

If the composition ratio of the filler to the mortar is less than 5 wt%, the composition of the filler is too small and the physical strength of the hardened mortar is weakened due to the construction of the connection portion of the slope. When the composition is more than 15 wt% The physical strength of the mortar becomes strong, but the problem that the elasticity and the restoring force are relatively weak may occur, so that the filler is preferably mixed in the composition within the above range.

In connection with the above, when the polymer fiber exceeds 1/3 of the weight of the filler contained in the mortar, the physical strength of the prepared mortar sharply falls, so that the composition ratio of the polymer fiber is Preferably not more than 1/3.

That is, the polymer fiber coated with the organic / inorganic hybrid polymer is preferably not mixed with the mortar in an amount exceeding 5% by weight. In order to realize the effect of the polymer fiber coated with the organic / inorganic hybrid polymer, It is preferable that they are mixed at the above composition ratio.

Also, the elastic material is a liquid phase structure in which isocyanate, polyol and additives are mixed, and the mortar according to the present invention is applied to the connecting portion of the slope and hardened, and then the elastic force and the restoring force against external force can be exerted.

That is, the isocyanate is an aromatic isocyanate such as toluene diisocyanate (TDI), diphenylmethane diisocyanate (MDI), polymeric MDI, toluidine diisocyanate (TODI), p-phenylene isocyanate, MDI, isophorone diisocyanate and the like can be used. These isocyanates may be used singly or in combination of two or more.

When the elastic material is included in the mixture of mortar, it may be used in place of a solvent such as water to dissolve the filler. If necessary, a solvent such as an elastic material and water may be used in combination Available.

The polyol may be at least one selected from the group consisting of polyoxypropylene glycol, polyoxypropylene polyoxyethylene glycol, polyoxybutylene glycol, polyoxytetramethylene glycol, polyoxypropylene triol, polyoxypropylene polyoxyethylene triol, Polyether polyols having a terminal hydroxyl group such as polyoxypropylene polyoxyethylene polyoxypropylene triol and the like; And polyester polyols having terminal hydroxyl groups derived from polyhydric alcohols such as phthalic acid, adipic acid and maleic acid and polyhydric alcohols such as ethylene glycol, propylene glycol, trimethylol propane, glycerin and pentaerythritol Among them, a polyester-based polyol is preferable. These polyols may be used singly or in combination of two or more.

Also, it is preferable that the polyol is mixed with isocyanate after preliminarily mixing with the additive. Examples of the additive include amines such as polyhydroxyamine, fatty acids such as ethoxy alkyl phenol, castor oil, defoaming agent and the like. The additive is preferably used in an amount of 0.2 to 3 parts by weight based on 100 parts by weight of the polyol.

The ratio of the isocyanate to the polyol in the above composition is preferably such that the equivalent ratio of the isocyanate group in the isocyanate to the hydroxyl group in the polyol is in the range of 0.8 to 1.2.

At this time, if the content of isocyanate is too small, sufficient physical properties can not be obtained, and if it is excessively large, sufficient physical properties for foaming can not be obtained.

In addition, it is preferable that the elastic material having the above-mentioned composition is mixed at a composition ratio of 10 to 20% by weight with respect to the mortar. At this time, if the elastic material is less than 10% by weight, the elasticity and the restoring force of the hardened mortar are insufficient. If the elastic material is more than 20% by weight, the elasticity and the restoring force are excellent, but the physical strength of the hardened mortar It is preferable that the elastic material is mixed at a composition ratio within the above range.

The aggregate may be a general material such as silica sand, dried river sand, land sand, sea sand or the like. If necessary, the aggregate may be thicker than sand such as small-sized gravel.

At this time, the aggregate of the above-mentioned constitution is preferably post-mixed in a mixture of the polymer fiber coated with the organic-inorganic hybrid polymer, the filler and the elastic material, and is preferably mixed in the composition ratio of 65 to 80% by weight with respect to the mortar .

That is, when the aggregate is contained in an amount of less than 65% by weight, there is a problem that the physical strength of the cured mortar is somewhat inferior to the aggregate, and when it exceeds 80% by weight, Since the composition ratio of the fibers, the filler, and the elastic material is decreased, the physical strength of the hardened mortar is lowered. Therefore, it is preferable that the aggregates are mixed in the composition ratio within the above range.

In addition, the mortar for connecting part to the inclined road according to the present invention having the above-described constitution is made of polymer fiber coated with organic / inorganic hybrid polymer, filler and solvent as main composition, and if necessary, a viscosity adjusting agent, a hardener or a defoaming agent It is possible to make a composition further including the same general additives.

The following is a test result on the flowability, compressive strength, impact resistance, and deformation recovery of mortar using the preferred embodiments and examples for producing the mortar for connecting part to the inclination according to the present invention.

1. Preparation of organic / inorganic hybrid polymer

① Polyvinylidene fluoride 200 g of co-hexafluoropropylene is dissolved in 800 g of dimethylacetamide to prepare an organic polymer solution.

2) Tetraethoxysilane (400 g) was dissolved in 600 g of ethanol to prepare a tetraethoxysilane solution. To the tetraethoxysilane solution, 3,000 g of distilled water was mixed and stirred to prepare an inorganic polymer solution. Then, 1,000 g of the organic polymer solution, Was mixed with stirring for 3 hours to prepare an organic-inorganic hybrid polymer.

2. Polymer fiber coating

(1) 500 g of the organic-inorganic hybrid polymer prepared in the step (1) is injected into the injector.

(2) After 1,000 g of the polyethylene fiber is received in the container, the organic-inorganic hybrid polymer is sprayed onto the polyethylene fiber using the sprayer prepared in the above (1) to be surface-coated. At this time, the polyethylene fibers to be coated should be continuously stirred. At this time, the coating thickness of the organic-inorganic hybrid polymer layer is made to be 150 mu m on average.

③ Polyethylene fiber coated with organic / inorganic hybrid polymer made in ② above is allowed to dry naturally for 3 ~ 5 hours.

3. Material mixing

1) 1.5 kg of an elastic material (CRETE II (Part A + Part B) manufactured by WABO Co., Ltd.) mixed with isocyanate, polyol and additives, 1 kg of fly ash, 7.2 kg of aggregate (silica sand having a particle size of 0.1 to 0.4 mm) And 0.3 kg of polyethylene fiber coated with organic / inorganic hybrid polymer were mixed with stirring to prepare a mortar.

1. Preparation of organic / inorganic hybrid polymer

① Polyvinylidene fluoride 200 g of co-hexafluoropropylene is dissolved in 800 g of dimethylacetamide to prepare an organic polymer solution.

2) Tetraethoxysilane (400 g) was dissolved in 600 g of ethanol to prepare a tetraethoxysilane solution. To the tetraethoxysilane solution, 3,000 g of distilled water was mixed and stirred to prepare an inorganic polymer solution. Then, 1,000 g of the organic polymer solution, Was mixed with stirring for 3 hours to prepare an organic-inorganic hybrid polymer.

2. Polymer fiber coating

(1) 500 g of the organic-inorganic hybrid polymer prepared in the step (1) is injected into the injector.

(2) After 1,000 g of the polyethylene fiber is received in the container, the organic-inorganic hybrid polymer is sprayed onto the polyethylene fiber using the sprayer prepared in the above (1) to be surface-coated. At this time, the polyethylene fibers to be coated should be continuously stirred. At this time, the coating thickness of the organic-inorganic hybrid polymer layer is made to be 150 mu m on average.

③ Polyethylene fiber coated with organic / inorganic hybrid polymer made in ② above is allowed to dry naturally for 3 ~ 5 hours.

3. Ionic Polymer Coating

① Prepare 5 liters of PDMA-ECH-EDA (Aldrich company) solution mixed with water and having a concentration of 0.7 mM, and immerse the polyethylene fiber coated with the organic / inorganic hybrid polymer made in ③ above. At this time, the PDMA-ECH-EDA solution was maintained at a temperature of 25 占 폚 and maintained in an immersed state for 24 hours to coat PDMA-ECH-EDA with an average thickness of 15 占 퐉 on the surface of the organic-inorganic hybrid polymer layer.

② The treated polyethylene fibers are recovered from the PDMA-ECH-EDA solution and dried at 25 ° C for 24 hours.

4. Material Mix

1) 1.5 kg of an elastic material (CRETE II (Part A + Part B) manufactured by WABO Co., Ltd.) mixed with isocyanate, polyol and additive, 1 kg of fly ash, 7.2 kg of aggregate (silica sand having a particle size of 0.1 to 0.4 mm) 0.3 kg of polyethylene fiber coated with PDMA-ECH-EDA is mixed with stirring to produce a mortar.

[exam]

The flowability, compressive strength, impact resistance and deformation recovery of each of the mortar prepared in Examples 1 and 2 were measured by the following methods, and the results are shown in Table 1 below.

1. Flow

On a flat steel plate, the mortar composition was filled in a conical barrel 30 mm in diameter and 50 mm in height, and then the barrel was removed to measure the width of the flow (unit: mm). The measurement temperature was 25 占 폚.

2. Compressive strength

A prismatic specimen of 0.5 × 0.5 × 1 inch was prepared by ASTM C 695, and after curing at 23 ° C., it was used for the test. The test was made according to ASTM D 695 on the seventh day of age.

3. Impact resistance

① The test specimens were constructed by using concrete with a width of 15 × 15 × 26 cm and a compressive strength of about 40 N / mm 2 as the base, and kneading each material with a thickness of 6 cm.

② The drop impact test was performed by dropping steel balls 51 mm in diameter and 535 g in diameter continuously from a height of 1.0 m while flowing water to a specimen installed at an inclination angle of 20 °. After the fall of the specimen 1000 times, . The results of the test were evaluated as " good ", and " good " when the mortar was not peeled or broken.

4. Deformation recovery

A cylindrical test specimen of 0.5 × 0.5 × 1 inch was prepared according to ASTM C 695, and the test piece was cured at 23 ° C. for 7 days at the age of 7 years. Respectively. The test is performed by applying a compressive load to the test specimen in accordance with ASTM D 695 and immediately removing the load at the point of 5% deformation. After the deformation of the specimen is sufficiently stabilized, the height of the specimen is measured to calculate the ratio (unit%) to the height before load application.

division Flow (mm) Compressive strength (N / m²) Impact resistance Deformation recovery (%) Example 1 49 15.8 ○ 92.5 Example 2 48 15.7 ○ 92.3

[result]

As shown in Table 1, the mortar for connecting part according to the present invention satisfies the degree of correspondence with the mortar for connecting part of general roads such as compressive strength, impact resistance and deformation recovery.

In particular, the flowability of mortar for general road connection part is about 80 ~ 90mm, and when the mortar is installed on a sloping road, the surface of the mortar flows down and the hollow space is formed by the flowing mortar on the upper part of the connection part However, the mortar according to the present invention has a fluidity (49 mm, 48 mm) which does not flow down when it is installed on an inclined road, thereby solving the problem of emptying the upper portion of the mortar-filled connection portion, There is no effect.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It is possible to carry out various changes in the present invention.

Claims (5)

A polymer fiber coated with an organic / inorganic hybrid polymer, a filler and a solvent,
Preferably,
And is made of one or more materials of polyamide, polyester, acrylonitrile, polyvinyl alcohol, polyvinyl chloride, polyvinylidene chloride, polypropylene, polyethylene or polyurethane,
The organic / inorganic hybrid polymer preferably has a weight-
50 to 60% by weight of polyvinylidene fluoride-co-hexafluoropropylene (PVDF-HFP) and 40 to 50% by weight of tetraethoxysilane (TEOS) ,
The organic / inorganic hybrid polymer preferably has a weight-
50 to 60% by weight of an organic polymer solution prepared by dissolving 15 to 25% by weight of polyvinylidene fluoride co-hexafluoropropylene in 75 to 85% by weight of dimethylacetamide, 35 to 45% by weight of tetraethoxysilane, And 40 to 50% by weight of an inorganic polymer solution obtained by mixing 2 to 5 times of distilled water with respect to the weight of the tetraethoxysilane solution and hydrolyzing the tetraethoxysilane solution,
The surface of the coating layer of the polymer fiber coated with the organic-inorganic hybrid polymer may be coated with one of ionic (poly) acrylic acid (PAA) or poly (dimethylamine-co- epishlorohydrin-co- ethylenediamine) Characterized in that the polymeric material is coated with a coating thickness of 1 to 20 占 퐉.
delete delete delete The method according to claim 1,
In the mortar,
1 to 5% by weight of a polymer fiber coated with organic / inorganic hybrid polymer;
5 to 15% by weight of a filler of at least one of Portland cement, fly ash, blast furnace slag powder, pozzolan powder or calcium carbonate powder;
10 to 20% by weight of an elastomer mixed with an isocyanate, a polyol and an additive;
And 65 to 80% by weight of an aggregate; and mortar for a connecting portion of an inclined road.

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