KR20100102548A - Method for forming wall - Google Patents

Abstract

PURPOSE: A method for forming a wall is provided to improve adhesion between a waterproof layer and a hydraulic composite and to prevent a waterproof agent from becoming contaminated during construction. CONSTITUTION: A method for forming a wall is as follows. A waterproof layer is loaded on the surface of a base composed of a hydraulic composite. A polyvinyl alcohol based film is loaded on the outer surface of the waterproof layer. The outer surface of the polyvinyl alcohol based film is coated with the hydraulic composite.

Description

Method for forming wall

The present invention relates to a wall forming method of forming a wall by coating and curing the hydraulic composition on the wall forming base.

Generally, in forming a wall surface, when concrete is constructed, it is hardened by pouring concrete to a form | work, a frame, etc., and hardening. However, this causes a problem that a fine gap occurs due to hardening shrinkage or the like during hardening of the concrete, and when the concrete is added and installed, such a gap causes the inundation of water. There was a problem such as lowering or cracking the cured product of concrete.

Therefore, a waterproofing agent is used for the purpose of preventing the ingress of water as mentioned above during the construction of concrete. For example, a method of coating the waterproofing agent on the wall surface of the concrete construction, and then injecting and curing the concrete is adopted. do. In this case, the waterproofing agent serves to prevent the ingress of water. As such a waterproofing agent, there are generally a waterproofing agent using an organic material such as asphalt type, rubber type, resin type (for example, urethane resin, epoxy resin, etc.), and a waterproofing agent using inorganic material.

Moreover, as the waterproofing method, for example, an index method using an index material containing bentonite and an elastomer containing an absorbent resin is also proposed (see Patent Document 1, for example).

JP2001-32694 A

However, simply coating the waterproofing agent as in the above technique is insufficient in terms of stability over time, such as contamination or deterioration of the waterproofing agent until it is added or coated with concrete, and workability during construction. Esau still had room for improvement. Moreover, further improvement is required also from the point of adhesiveness with the hardened | cured material of hydraulic compositions, such as a waterproofing agent and concrete.

Therefore, in the present invention, under such a background, concrete construction is performed on the wall surface foundation, which can prevent contamination of the waterproofing agent over time, excellent construction workability, and adhesion between the waterproofing layer and the cured product of the hydraulic composition. An object of the present invention is to provide an excellent wall surface forming method.

Therefore, the present inventor has made intensive studies in view of such circumstances, and in forming the wall surface which hardens a hydraulic composition, by providing a waterproof layer and a polyvinyl alcohol-type film in the intermediate | middle layer of a wall surface, Contamination can be prevented and excellent workability is also found to complete the present invention.

That is, the gist of the present invention is to form a wall surface formed by curing the hydraulic composition, after laminating a waterproof layer on the surface of the substrate made of the cured product of the hydraulic composition, and then laminating a polyvinyl alcohol-based film on the outside thereof, and again the hydraulic A method of forming a wall surface by coating and curing a composition.

According to the wall surface forming method of the present invention, since the polyvinyl alcohol-based film can protect the waterproofing layer, it is possible to prevent contamination of the waterproofing agent over time, and since the polyvinyl alcohol-based film is an absorbent film, The effect can be further improved, and the workability is excellent. Moreover, it also has the effect of improving the adhesiveness of the waterproofing layer and the hardened | cured material of a hydraulic composition.

EMBODIMENT OF THE INVENTION Hereinafter, this invention is demonstrated in detail.

The waterproofing layer formed in the wall surface forming method of the present invention is conventionally used for waterproofing points such as concrete shedding parts in civil engineering and building structures, joint parts in construction of concrete and other members, or seams of concrete primary products. It may be a layer formed from a conventionally known waterproofing agent. For example, a waterproofing agent using an organic material (eg, urethane resin, epoxy resin, etc.) such as asphalt, rubber, resin, or the like, or a waterproofing agent using an inorganic material may be mentioned. Can be. Among them, asphalt waterproofing agents are very suitable.

Moreover, in this invention, 10-15 weight part of asphalt, 20-50 weight part of oils, 8-12 weight part of fillers, and a thickener among the said waterproofing agents are especially described in Unexamined-Japanese-Patent No. 2006-131864. 1-3.5 weight part, surfactant 0.1-0. After heating 5 parts by weight at 150 ° C to 180 ° C, 25 to 40 parts by weight of the waste tire dissolving solution, 0.5 to 1 part by weight of sulfur, 0.05 to 1 part by weight of vulcanization accelerator, and 0.1 to 0.4 parts by weight of anti-aging agent were added to bentonite 10 to It is preferable to use an asphalt-based waterproofing agent made by mixing 20 parts by weight and 1 to 5 parts by weight of a water-soluble polymer resin in that it is excellent in waterproofing effect and excellent in followability on the basis of wall surface formation.

The polyvinyl alcohol-type film used for this invention is a film formed by forming a polyvinyl alcohol-type resin solution into a film.

As such polyvinyl alcohol-type resin, it can manufacture by a conventionally well-known method, For example, it is a thing obtained by saponification of the polyvinyl acetate obtained by superposing | polymerizing vinyl acetate.

About this invention, it is also possible to copolymerize another monomer in the range which does not impair the objective of this invention, for example, 10 mol% or less, Preferably 1-7 mol%, As such a monomer, for example, Olefins such as ethylene, propylene, isobutylene, α-octene, α-dodecene, α-octadecene, unsaturated acids such as acrylic acid, methacrylic acid, crotonic acid, maleic acid, maleic anhydride and itaconic acid or salts thereof; or Nitriles such as acrylonitrile and methacrylonitrile, amides such as acrylamide and methacrylamide, olefin sulfonic acids such as ethylene sulfone, allyl sulfonic acid, and metaallyl sulfonic acid or salts thereof, such as mono or dialkyl esters , Alkyl vinyl ethers, N-acrylamide methyl trimethyl ammonium chloride, allyl trimethyl ammonium chloride, dimethyl diallyl ammonium chloride, dimethyl allyl vinyl ketone, N-vinyl pyrrole Polyoxyalkylene (meth) allyl ether, polyoxyethylene (meth) acrylate, polyoxypropylene, such as pig, vinyl chloride, vinylidene chloride, polyoxyethylene (meth) allyl ether, and polyoxypropylene (meth) allyl ether Polyoxyalkylene (meth) acrylamide, such as polyoxyalkylene (meth) acrylate, polyoxyethylene (meth) acrylamide, and polyoxypropylene (meth) acrylamide, such as (meth) acrylate, and polyoxyethylene ( 1- (meth) acrylamide-1,1-dimethylpropyl) ester, polyoxyethylene vinyl ether, polyoxypropylene vinyl ether, polyoxyethylene allylamine, polyoxypropylene allylamine, polyoxyethylene vinylamine, polyoxypropylene Vinylamine, diacrylacetoneamide, and the like.

Moreover, N-acrylamide methyl trimethyl ammonium chloride, N-acrylamide ethyl trimethyl ammonium chloride, N-acrylamide propyl trimethyl ammonium chloride, 2-acryloxy ethyl trimethyl ammonium chloride, 2-methacrylethyl trimethyl ammonium chloride, 2- Contains cation groups such as hydroxy-3-methacryloyloxypropyltrimethylammonium chloride, allyltrimethylammonium chloride, metaallyltrimethylammonium chloride, 3-butenetrimethylammonium chloride, dimethyldiallylammonium chloride and diethyldiallylammonium chloride Monomers and the like.

Moreover, polyvinyl alcohol-type resin etc. which contained the acetacetyl group can also be used.

Moreover, it is also preferable to use polyvinyl alcohol-type resin which has a 1, 2-diol bond in a side chain as polyvinyl alcohol-type resin, and the polyvinyl alcohol-type resin which has a 1, 2-diol bond in such a side chain is, for example, (A) Method of saponifying copolymer of vinyl acetate and 3, 4- diacetoxy-1-butene, (B) Method of saponifying and decarboxylation of copolymer of vinyl acetate and vinyl ethylene carbonate, ) A method of saponifying and deketalizing a copolymer of vinyl acetate and 2,2-dialkyl 4-vinyl-1,3-dioxolane, and (d) a method of saponifying a copolymer of vinyl acetate and glycerin monoallyl ether. Method, or the like.

The average degree of influence of the polyvinyl alcohol resin used in the present invention is usually 70 mol% or more, preferably 70 to 98 mol%, more preferably 75 to 97 mol%, particularly preferably 80-96 mol%. When laminating a hydraulic composition after laminating a polyvinyl alcohol-based film having such an average sensibility outside the above range on the wall surface forming base, dissolution of the film is insufficient in the interior, and there is a tendency that the painted wall surface may collapse. .

About 4 weight% aqueous solution viscosity in 20 degreeC of polyvinyl alcohol-type resin, it is preferable that it is 10-70 mPa * s normally, More preferably, it is 10-65 mPa * s, Especially preferably, it is 15-60 mPa S. If the 4 wt% aqueous solution viscosity is too low, the film may be lost, which may interfere with lamination to the wall, or the film may crack during the attachment operation, and if it is too high, after laminating the polyvinyl alcohol-based film to the wall forming base, When coating a hydraulic composition, there exists a tendency for the dissolution of a film to become inadequate, and there exists a possibility that the coated wall surface may collapse.

In addition, the measurement of an average reduction degree is performed according to JISKK6726K3.5, and the viscosity is measured according to JISKK6726K3.11.2.

About this invention, it is also possible to use not only 1 type of said polyvinyl alcohol-type resins in combination, but also 2 or more types.

Although a polyvinyl alcohol-type film is formed into a film using the said polyvinyl alcohol-type resin, Preferably, a plasticizer and surfactant are also included again, and a filler and starch can also be included again as needed.

As the plasticizer used in the present invention, for example, glycerin such as glycerin, diglycerin, triglycerine, alkylene glycols such as triethylene glycol, polyethylene glycol, polypropylene glycol, dipropyllin glycol, trimethylolpropane and the like Can be mentioned. These are used individually or in combination of 2 or more types.

About content of such a plasticizer, it is preferable that it is 5-45 weight part with respect to 100 weight part of polyvinyl alcohol-type resins, Especially it is preferable that it is 7-40 weight part, and also 10-35 weight part. When the content is too small, the plasticizing effect tends to be low, and when too large, the plasticizer tends to spread from the surface over time.

As the surfactant used in the present invention, for example, polyoxyethylene nonylphenyl

Ether, polyoxyethylene octylnonyl ether, polyoxyethylene dodecylphenyl ether, polyoxyethylene alkyl allyl ether, polyoxyethylene sorbitan monolaurate, polyoxyethylene sorbitan monopalmitate, polyoxyethylene sorbitan monostearate And polyoxyethylene alkylamino ethers such as polyoxyethylene sorbitan monooleate, polyoxyalkylene alkyl ether phosphoric acid ester monoethanolamine salt, polyoxyethylene lauryl amino ether, polyoxyethylene stearyl amino ether, and the like. It is used 1 type or in combination or 2 or more types. Among them, polyoxyalkylene alkyl ether phosphate ester monoethanolamine salt and polyoxyethylene alkyl amino ether are very suitable in terms of peelability.

About content of such surfactant, it is preferable that it is 0.01-5 weight part with respect to 100 weight part of polyvinyl alcohol-type resins, It is especially preferable that it is 0.03-3 weight part, and also 0.05-2 weight part. If the content is too small, the peelability between metal surfaces such as drums and belts of the film forming apparatus and the film formed therein tends to be difficult, and if too large, the film tends to bleed onto the film surface and cause blocking, resulting in poor handling. Tend to be.

As a filler used for this invention, an inorganic filler and an organic filler are mentioned.

As an inorganic filler, it is preferable that the average particle diameter is 1-10 micrometers, and when this average particle diameter is too small, there exists a tendency for the blocking inhibitory effect of a film to become small, and when too large, the appearance of a film will worsen and product value will fall. There is a tendency. Specific examples include talc, mud, silicon dioxide, diatomaceous earth, kaolin, mica, asbestos, gypsum, graphite, glass balloons, glass beads, calcium sulfate, barium sulfate, ammonium sulfate, calcium sulfite , Calcium carbonate, whisker type calcium carbonate, magnesium carbonate, dosonite, roadite, potassium titanate, carbon black, glass fiber, alumina fiber, boron fiber, processed mineral fiber, carbon fiber, carbon hollow core, bentonite, montmorillonite , Copper powder, sodium sulfate, potassium sulfate, zinc sulfate, copper sulfate, iron sulfate, magnesium sulfate, aluminum sulfate, potassium aluminum sulfate, anmonium acetate, sodium acetate, potassium acetate, aluminum acetate, ammonium chloride, sodium chloride, potassium chloride, magnesium chloride And calcium chloride, sodium phosphate, potassium chromate, calcium citrate and the like.

It is preferable that content of such an inorganic filler is 0.1-50 weight part with respect to 100 weight part of polyvinyl alcohol-type resins, Especially preferably, it is 0.5-10 weight part. When there is too little such content, there exists a tendency for a blocking inhibitory effect to become small, and when too much, there exists a tendency for the tensile elongation of a film to fall.

Moreover, as an organic filler, the thing whose average particle diameter is 0.5-10 micrometers is preferable, More preferably, it is 0.5-7 micrometers, Especially preferably, it is 0.5-5 micrometers, Most preferably, it is 0.5-3 micrometers. If the average particle diameter is too small, it tends to be expensive in terms of equipment cost, and if too large, dispersibility tends to decrease.

Specific examples of such organic fillers include, for example, starch, melamine-based resins, polymethyl (meth) acrylate-based resins, polystyrene-based resins, and biodegradable resins such as polylactic acid and rice starch. (Meth) acrylate resins, polystyrene resins, and biodegradable resins are suitably used.

It is preferable that it is 5-25 weight part with respect to 100 weight part of polyvinyl alcohol-type resins, and, as for content of such an organic filler, it is preferable that it is 5-15 weight part especially. If the content is too small, the film tends to block. If the content is too large, the film tends to be unable to obtain flexibility.

In addition, starch is contained for the purpose of blocking prevention and adjustment of mechanical strength, but the average particle diameter thereof is preferably 10 µm or more, and specific examples include raw starch (corn precipitate, potato starch, sugar cane starch, flour starch, cassava). Starch, sago starch, tapioca starch, sorghum starch, rice starch, soybean starch, boiled starch, fern starch, lotus starch, heath starch, etc .; physically modified starch (α-starch, fractionated amylose, moist heat treatment) Starch, etc.); enzyme modified starch (hydrolyzed dextrin, dehydrogenated dextrin, amylose, etc.); chemically denatured starch (acid treated starch, hypochlorous acid oxidized starch, dialdehyde starch, etc.); chemically modified starch derivatives (esterified starch, ether Hydrogenated starch, cationic starch, crosslinked starch and the like). Examples of the esterified starch in the chemically modified starch derivative include acetic acid esterified starch, succinic acid esterified starch, acetate esterified starch, phosphate esterified starch, urea phosphate esterified starch, xanthic acid esterified starch, acet acetate esterified starch and the like. As the etherified starch, cationic starch such as allyl ether starch, methyl ether starch, carboxy methyl ether starch, hydroxy ethyl ether starch, hydroxy propyl ether starch, starch and 2-diethyl amino ethyl Examples of the crosslinked starch, such as chloride reactant, starch and reactant of 2,3-epoxypropyltrimethylammonium chloride, include formaldehyde crosslinked starch, epicrohydrin crosslinked starch, phosphoric acid crosslinked starch, acrolein crosslinked starch and the like. Among them, raw starch is easy to obtain and economical. It is suitable for intestine.

It is preferable that content of such a starch is 0.1-40 weight part with respect to 100 weight part of polyvinyl alcohol-type resins, Especially preferably, it is 1-30 weight part. If the content is too small, the blocking inhibitory effect is low, and the effect of improving the mechanical strength tends to be small. If the content is too large, the appearance and tensile elongation of the film tend to be greatly reduced.

As described above, in the present invention, a polyvinyl alcohol-based resin may be formed into a polyvinyl alcohol-based film by containing a plasticizer, additives such as a surfactant, and the like as a main component to form a polyvinyl alcohol-based film. Conventionally known methods, such as casting, can be employ | adopted.

In this invention, it is especially preferable that the water content of a polyvinyl alcohol-type film is 3-10 weight% from a handling point, More preferably, the water content is 3-9 weight%, Especially preferably, it is 4-8 weight%. Too low a water content of such a film tends to cause tearing or cracking during construction, and too high a tendency of blocking during storage.

As a method of adjusting the moisture content of such a film in the said range, it is the method of adjusting in the drying process at the time of film forming, (2) the method of humidifying after film forming drying, and the method of drying again after film forming drying, for example. And the like, among which, the method (2) is very suitable.

About the polyvinyl alcohol-type film used by this invention, the thickness is 20-5

It is preferable that it is 0 micrometer, It is especially preferable that it is 25-40 micrometers, When this thickness is too thin, there exists a tendency for tearing or a cracking at the time of construction, and when too thick, the possibility that a residue will generate | occur | produce becomes large. There is this.

In addition, the surface of the polyvinyl alcohol-based film may be flat, but may be embossed, lacquered, or the like on one side or both sides of the film.

In addition, the polyvinyl alcohol-based film of the present invention includes other water-soluble polymers (sodium polyacrylate, polyethylene oxide, polyvinylpyrrolidone, dextrin, chitosan, chitin, methyl cellulose, Hydroxyethyl cellulose, etc.), fragrances, waterproofing agents, colorants, extenders, antifoaming agents, ultraviolet absorbers, and the like.

As a hydraulic composition used for this invention, cement milk, mortar, concrete, etc. which have cement as a main component are mentioned, for example, and a thing containing various cements and admixtures (agent) becomes an object. For example, portland cement, crude steel portland cement, furnace cement, fly ash cement or furnace slug, fly ash silica fume, expander, bentonite, AE (air entrained) agent, AE reducing agent, water reducing agent, high performance reducing agent, high performance AE reducing agent, Accelerator, reinforcing agent, retardant, foaming agent, antifoaming agent, crack reducing agent, etc.

It is included to include.

Next, the wall surface forming method of this invention is demonstrated.

In forming the wall surface formed by hardening a hydraulic composition, after laminating | stacking a waterproof layer on the surface of the base which consists of hardened | cured material of a hydraulic composition, a polyvinyl alcohol-type film is laminated on the other side, and it hardens by coating a hydraulic composition again By doing so, the wall surface can be formed.

For example, a wall surface can be formed as follows.

That is, once, the hydraulic composition is poured into a mold or the like and cured, and then, a waterproofing agent is coated on the surface of the cured product to form a waterproofing layer.

As the formation of the waterproofing layer, the waterproofing agent is directly coated on the base of the cured product, or after the primer layer is formed, the waterproofing agent is applied, and the base material (for example, rubber, etc.) of the coated surface is attached and fixed on the cured product base. And a method of coating. In addition, since a waterproofing agent is a hydrophobic or water-repellent compound, it is used in order to improve affinity with hydraulic compositions, such as concrete.

Thereafter, the hydraulic composition is coated and cured again from above the waterproof layer.

Coating of a hydraulic composition can be divided into several times, and it can coat multiple layers, and it is also preferable to provide a waterproof layer and a polyvinyl alcohol-type film between each layer at that time.

Here, the coating of the hydraulic composition means not only the coating of the paste-like thing of the hydraulic composition, but also an operation such as pouring and blowing, and also includes an operation of forming a state such as actually being laminated on the waterproof layer. .

Moreover, as thickness of the said waterproof layer, it is 1 mm-10 mm normally, Especially it is preferable that they are 2 mm-7 mm, and also 3 mm-5 mm.

In this way, although the wall surface which hardens a hydraulic composition is formed by the method of this invention, according to the method of this invention, it is very effective for manufacture of various civil engineering and building structures.

(Example)

Hereinafter, although an Example is given and this invention is demonstrated further more concretely, this invention is not limited to a following example, unless the summary is exceeded.

In addition, "part" and "%" in an Example mean a basis of weight unless there is particular notice.

(Example 1)

88 mol% of sensitization, 4% aqueous solution viscosity 20 mPa * s polyvinyl alcohol in 20 degreeC is dissolved in water, it is set as the aqueous solution of 22% density | concentration, and glycerin as a plasticizer with respect to 100 parts of said polyvinyl alcohol again 2 parts, 1 part of sorbitan ester ether and 2 parts of silicon dioxide are mix | blended as surfactant, the resin solution of 28% of solid content concentration is prepared, and the obtained resin solution is cast on the metal surface of the endless belt of 80 degreeC, and it is 110 degreeC. Four drying processes of -120 ° C-115 ° C-100 ° C were passed for 45 seconds each and dried for a total of 3 minutes to obtain a polyvinyl alcohol film having a water content of 4% and a thickness of 30 µm.

Subsequently, using the obtained polyvinyl alcohol film, it stuck on the waterproof layer, and after that cement concrete was applied and the wall surface was formed, the waterproof effect was also obtained and the workability was favorable also without a crack. Moreover, the adhesiveness of a waterproof layer and concrete was also favorable.

(Example 2)

88 mol% of sensitization, 4% aqueous solution viscosity 20 mPa * s polyvinyl alcohol in 20 degreeC is dissolved in water, it is set as the aqueous solution of 22% density | concentration, and glycerin as a plasticizer with respect to 100 parts of said polyvinyl alcohol again 1 part of sorbitan ester ether and 6 parts of raw starch are prepared as a surfactant, and the resin solution of 28% of solid content concentration is prepared, and the obtained resin solution is cast on the metal surface of the endless belt of 80 degreeC, 110 Four drying processes of 45 ° C. and 120 ° C. and 115 ° C. and 100 ° C. were passed for 45 seconds each, for a total of 3 minutes to obtain a polyvinyl alcohol film having a water content of 4% and a thickness of 30 μm.

Subsequently, using the obtained polyvinyl alcohol film, it stuck on the waterproof layer, and after that, concrete was constructed and the wall surface was formed, the waterproof effect was acquired and the workability was also favorable without a crack. Moreover, the adhesiveness of a waterproof layer and concrete was also favorable.

The wall surface formation method of this invention is very useful as a favorable method of workability when carrying out concrete construction in civil engineering and a building structure.

Claims (3)

In forming the wall surface which hardens a hydraulic composition, after laminating | stacking a waterproof layer on the surface of the base which consists of hardened | cured material of a hydraulic composition, it laminates a polyvinyl alcohol-type film on the outside, and hardens by coating a hydraulic composition again. A wall surface forming method characterized by the above-mentioned. The method according to claim 1,
The polyvinyl alcohol-based film is formed by forming a polyvinyl alcohol-based resin having a 4 wt% aqueous solution viscosity of 10 to 70 mPa · s and an average degree of reduction of 70 to 98 mol% at 20 ° C. . The method according to claim 1 or 2,
The film thickness of the said polyvinyl alcohol-type film is 20-50 micrometers, The wall surface formation method characterized by the above-mentioned.