JP4570844B2 - Cement construction primer, cement construction method, and cement structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a cement construction primer, a cement construction method, and a cement structure.
[0002]
[Prior art]
In general, when a new mortar or concrete is handed over to an existing groundwork, a phenomenon commonly called dry-out occurs in the new mortar or concrete due to the water absorption to the groundwork, resulting in separation on the joint surface. May occur. As a countermeasure, an oil-in-water (O / W type) emulsion or an epoxy resin is applied as a primer to the base surface.
[0003]
(1) Oil-in-water (O / W) emulsion
In order to prevent this peeling, if the existing substrate is mortar or concrete, apply a primer of polymer oil-in-water (O / W) emulsion such as EVA, acrylic or SBR to adjust the water absorption of the substrate It is common to do. However, EVA-based, acrylic-based and SBR-based primers have a smaller cohesive strength than cement mortar and concrete and have relatively low alkali resistance and water resistance, which may cause problems in durability. is there.
[0004]
Furthermore, the primer of polymer oil-in-water (O / W) emulsions such as EVA, acrylic, SBR, etc., forms a film having a water absorption adjusting effect when dried and loses moisture. Below, it takes a long time to dry (film formation). In particular, since the primer for constructing the self-leveling material is generally applied twice, it causes the construction period to be delayed at low temperatures. In particular, in the case of a fast-curing self-leveling material, the influence is great.
[0005]
In addition, oil-in-water (O / W) emulsion primers are used for vinyl chloride resins and vinyl chloride, such as ceramic materials used in tiles, etc., and finishing flooring materials for interiors, other than mortar or concrete. -Vinyl acetate copolymer resins, vinyl acetate resins and vinyl copolymer resins used as adhesives, rubber latex and epoxy resins, polyurethanes and epoxy resins used in interior finish flooring materials, unsaturated polyesters In the case of a resin, a metal such as a steel frame, or a wood material widely used for interiors, sufficient adhesive strength cannot be obtained.
[0006]
(2) Epoxy resin
There is a method of using an epoxy resin adhesive as a primer other than an oil-in-water (O / W type) emulsion. This adhesive is a compound composed of a main component mainly composed of an epoxy resin and a polyamine curing agent, has high adhesiveness, and provides stable cohesion and durability even after curing. Furthermore, a stable adhesive force can be obtained even with a primer other than mortar or concrete for which sufficient adhesive force cannot be expected with an oil-in-water (O / W) emulsion primer. However, in the joining after the adhesive having the adhesive performance applied is cured, the adhesive force with the newly installed mortar or concrete to be joined is hardly expected. Therefore, if the process of transferring concrete or mortar is delayed for some reason, the base and concrete or mortar may be peeled off.
[0007]
[Problems to be solved by the invention]
  The present invention addresses the above situation.Using cementBy having high water resistance, alkali resistance, and strong cohesive force when passing concrete or mortar, it has high and stable adhesive strength,Using cementEven if the process of transferring concrete or mortar is delayed for some reason, a cement construction primer that maintains excellent adhesive strength, a cement construction method using the cement construction primer, and the cement construction method It aims at providing the cement structure obtained.
[0008]
[Means for Solving the Problems]
  In order to achieve the above object, a cement construction primer according to the present invention comprises an epoxy acrylate,Consists of accelerators and peroxides selected from organometallic acids and tertiary aminesAnd a curing agent containing a catalyst, and used when casting concrete or mortar using cement.
[0009]
Another aspect of the present invention is a cement construction method, in which the above cement construction primer is applied on a base, and then uncured mortar or uncured concrete is applied. Including. In this case, it is preferable to use a self-leveling material as uncured mortar or uncured concrete.
Another aspect of the present invention is a cement structure, and the cement structure is constructed by performing the cement construction method of the present invention.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
  Next, the primer for cement construction, the cement construction method, and the cement structure according to the present invention will be described in more detail with respect to embodiments thereof.
[0011]
In addition, when the term “polymerization” is used in this specification, the concept is also included when “condensation” and “condensation polymerization” occur. Further, “monomer” includes not only a case where a single monomer is polymerized but also a case where a plurality of molecular species are polymerized. When the polymer is used as the raw material compound, it includes a case where the raw material compound polymerized to some extent is further polymerized to become higher polymer.
[0012]
  The primer for cement construction according to the present invention contains epoxy acrylate as a thermosetting resin. Epoxy acrylate is a thermosetting resin that is cured by mixing two or more. Epoxy acrylate is preferable because it cures at room temperature and does not need to be heated. The curing reaction is started by mixing the main agent in which the styrene monomer is blended with the epoxy acrylate and the curing agent (accelerator and / or catalyst). In addition, a polymerization inhibitor, a polymerization inhibitor, a shrinkage reducing agent, and the like may be mixed. A part of the curing agent, a polymerization inhibitor, a polymerization inhibitor, a shrinkage reducing agent, and the like may be added to the main agent.
  Examples of the epoxy acrylate include bisphenol epoxy acrylate and novolac epoxy acrylate.
  The styrene monomer is preferably 10 to 250 parts by weight, more preferably 50 to 150 parts by weight, based on 100 parts by weight of each of the epoxy acrylate or unsaturated polyester. When the blending amount of the styrene monomer is less than 10 parts by weight, the workability deteriorates due to high viscosity, and when it exceeds 250 parts by weight, the film strength decreases.
  A part or all of the styrene monomer is a styrene monomer such as chlorostyrene or divinylbenzene, or a polymerizable monomer such as methyl (meth) acrylate, ethyl (meth) acrylate, or ethylene glycol di (meth) acrylate. It is possible to substitute and use it within the range that does not impair the gist. Because the curing agent cures in a short time even at room temperature,Use accelerator and catalyst together.
  As the accelerator, known ones can be used, such as organic metal acids such as cobalt salts represented by cobalt naphthenate and cobalt octenoate, benzyldimethylamine, 2,4,6-tris (dimethylaminomethyl) phenol, Tertiary amines such as triethylamineUse. The accelerator is preferably 0.01 to 5.0 parts by weight with respect to 100 parts by weight of each of epoxy acrylate or unsaturated polyester. If it is less than 0.01 part by weight, the curing time is remarkably delayed, and if it exceeds 5.0 part by weight, the film strength is lowered.
  As the catalyst, known ones can be used, such as ketone peroxides represented by methyl ethyl ketone peroxide, cumene hydroperoxide, tertiary butyl hydroxide, organic peroxides, etc.Use. The catalyst is preferably 0.1 to 5.0 parts by weight, more preferably 0.2 to 2.0 parts by weight, based on 100 parts by weight of each of the epoxy acrylate or unsaturated polyester. If it is less than 0.1 part by weight, the curing time is remarkably delayed, and if it exceeds 5.0 parts by weight, the film strength is lowered.
  Furthermore, the compound which gives the following general formula can be illustrated as a suitable thing as said bisphenol-type epoxy acrylate. A novolak epoxy acrylate resin containing this compound as a main component is subject to polymerization inhibition by oxygen.
[Chemical 1]
(In the formula, n is 1 to 4.)
[0013]
Furthermore, compounds that give the following general formula can be exemplified as suitable novolak epoxy acrylates. A novolak epoxy acrylate resin containing this compound as a main component is subject to polymerization inhibition by oxygen.
[Chemical 2]
(In the formula, n is 1 to 4.)
[0014]
Furthermore, the compound which gives the following general formula can be illustrated as a suitable thing as said bisphenol-type unsaturated polyester resin. A bisphenol unsaturated polyester resin containing this compound as a main component is subject to polymerization inhibition by oxygen.
[Chemical Formula 3]
(In the formula, n is 1 to 7.)
In the present invention, by using such a thermosetting resin that is cured by mixing two or more kinds, it is possible to expect a high and stable adhesive force by having high water resistance, alkali resistance, and strong cohesive force.
[0015]
The cement construction primer according to the present invention is applied on a base, and uncured mortar or uncured concrete is applied on the base. In addition, a primer means the water absorption adjusting agent (material) of the foundation | substrate used when handing over concrete or mortar to the existing foundation | substrate, or the adhesion | attachment enhancer (material) with a foundation | substrate. In the case of this invention, the characteristic of the adhesion | attachment enhancer (material) with a foundation | substrate is large.
[0016]
Concrete or mortar as used in the present invention refers to a mixture of a hydraulic substance such as cement, gypsum, dolomite plaster, etc., mixed with aggregate and water, and more commonly used admixture (material). In addition, the mixture is included.
Concrete containing aggregates with a particle size of 5 mm or more is concrete, and mortar contains only aggregates with a particle size of less than 5 mm. As an admixture (material), inorganic powder, hydratable swelling material, fiber, thickener, water reducing agent, water retention agent, pigment, shrinkage reducing agent, surfactant, antifoaming agent, waterproofing agent, rust preventive agent, Workability improvers, separation inhibitors, water repellents, AE agents, white flower inhibitors, cement polymers and the like can be mentioned, and one or more can be used as necessary.
[0017]
The cement construction method according to the present invention includes applying the cement construction primer according to the present invention on a base, and then applying (joining) uncured mortar or uncured concrete. In the present invention, since the primer surface is subjected to polymerization inhibition by components in the air, it has a stable adhesive force even when it takes several days from primer application to concrete or mortar joining. According to the cement construction method of the present invention, an excellent cement structure can be obtained in cement construction regardless of the delay in construction period.
A self-leveling material is suitable as the uncured mortar or uncured concrete. The self-leveling material has the property of being able to form a flat / smooth floor simply by pouring it on the floor surface and having it flow easily. In general, cement or gypsum is the mortar of the binder.
[0018]
  Used in the present inventionPoxy acrylateWhen applying to a porous base, if the viscosity is too low, the amount of the coating is increased because the base is sucked into the base, and thus the economical efficiency is deteriorated. Therefore, the viscosity is preferably 50 mPa · s or more. In consideration of workability, the viscosity is more preferably 1000 mPa · s or less.
[0019]
【Example】
Hereinafter, examples and comparative examples of the present invention will be given, and the functions and effects of the present invention will be described in more detail.
[0020]
Examples 1 and 2 and Comparative Examples 1 to 4
Primers used
Table 1 shows the primers used in Examples and Comparative Examples. The viscosity was measured with a B-type viscometer.
In Example 1, 150 parts by weight of a styrene monomer, 1 part by weight of methyl ethyl ketone peroxide, and 0.5 parts by weight of cobalt naphthenate were blended with respect to 100 parts by weight of a bisphenol-based epoxy acrylate having the following general formula. A bisphenol-based epoxy acrylate resin that was subjected to polymerization inhibition by oxygen was used.
[Formula 4]
(In the formula, n is 1.)
In Example 2, 150 parts by weight of a styrene monomer, 1 part by weight of methyl ethyl ketone peroxide, and 0.3 parts by weight of cobalt naphthenate were blended with respect to 100 parts by weight of a novolak epoxy acrylate having the following general formula. A novolak epoxy acrylate resin that is inhibited by the polymerization of oxygen by oxygen was used.
[Chemical formula 5]
(In the formula, n is 1.)
[0021]
In Comparative Example 1, Pacific Mole Hit emulsion (solid content 45%) manufactured by Taiheiyo Material Co., Ltd. was used.
In Comparative Example 2, a Pacific Effect (solid content 45%) manufactured by Taiheiyo Material Co., Ltd. was used.
In Comparative Example 3, Pacific CX-B (solid content 45%) manufactured by Taiheiyo Material Co., Ltd. was used.
In Comparative Example 4, Unitac 5000-3 manufactured by Taiheiyo Material Co., Ltd. was used.
[Table 1]
* 1 Comparative Examples 1, 2, and 3 show the viscosity when diluted with water so that the solid content is 15% because the dilution with water is performed at the time of application.
[0022]
Surface polymerization inhibition confirmation test by components in air of Examples 1 and 2
(1) Test method
1) Each primer was applied on two acrylic plates.
2) One of the acrylic plates coated with the primer was allowed to stand as it was so that the coated primer surface layer was in contact with air. The other acrylic plate was placed on the primer coated with the acrylic plate immediately after the primer was applied, and allowed to stand so that the surface layer of the applied primer was not in contact with air.
3) Three days later, the acrylic plate placed on the primer was removed, and the adhesiveness of the primer surface layer applied on the two acrylic plates coated with the primer was confirmed by touching with a finger.
[0023]
(2) Experimental results
The experimental results are shown in Table 2.
[Table 2]
[0024]
Adhesion test using Examples 1 and 2 and Comparative Examples 1 to 4
(1) How to make an adhesion test specimen
A primer is applied to the base with a brush and cured at a temperature of 20 ° C. and a humidity of 60% for a predetermined time. A mortar is applied on the substrate to a thickness of 10 mm, and a predetermined curing is performed. An adhesion test specimen was obtained.
[0025]
(2) Preparation method for adhesion test specimen
1) Concrete foundation
JIS A 5371 Annex 2 Normal flat plate 300x300x60mm concrete plate surface that conforms to the provisions of Nominal 300 The dirt and deposits on the surface of the concrete plate are removed with a wire brush, washed with water, and dried thoroughly. did.
2) Adhesive base
300 g / m of adhesive for vinyl flooring conforming to JIS A 5536 (Royal latex type vinyl floor tiles / adhesive royal S for vinyl floor sheet, manufactured by Toli Co.) to concrete base²What was applied and sufficiently cured was used as an adhesive base.
[0026]
3) Vinyl floor tile base
A vinyl floor tile was affixed to an adhesive base immediately before application of the adhesive (before the adhesive was cured), and the adhesive was sufficiently cured to form a vinyl floor tile base.
4) Ceramic tile base
A ceramic tile for interior was attached to the concrete base using an epoxy adhesive, and the adhesive was sufficiently cured to make the ceramic tile base.
5) Wood substrate
A flooring material was affixed to a concrete base using an epoxy adhesive and the adhesive was sufficiently cured to make a wood base.
[0027]
(3) Primer application
The primer application was as shown in Table 3.
[Table 3]
The period from primer application to mortar construction (primer curing period) was 1 hour, 5 hours, and 1 day.
[0028]
(4) Mixing mortar
Mortar (1: 3 mortar) with 1: 3 cement: aggregate (weight ratio) of 500 g of ordinary Portland cement manufactured by Taiheiyo Cement Co., 1500 g of mountain sand from Hamaoka-cho, Ogasa-gun, Shizuoka Prefecture, and 270 g of tap water.
[0029]
▲ 5 ▼ Mortar curing
Mortar curing was as follows.
Standard curing: After mortar molding, curing was performed for 7 days under the conditions of a temperature of 20 ° C. and a humidity of 60%.
Underwater curing: After mortar molding, the film was cured in water at a temperature of 20 ° C. and a humidity of 60% for 24 hours and in water at a temperature of 20 ° C. for 5 days, and then dried at a temperature of 20 ° C. and a humidity of 60% for 24 hours.
[0030]
(6) Bond strength measurement
1 is cut into the surface of the adhesion test body 1 shown in FIG. 1 to a depth that reaches the ground, and the surface of the square cut portion is sufficiently polished with a No. 150 sandpaper, and then epoxy A steel jig having a size of 40 × 40 mm was pasted with a system adhesive.
After the adhesive was cured, the adhesion strength was measured using a Kenken-type adhesive strength tester.
[0031]
(6) Results of adhesion strength measurement
The adhesion strength measurement results are shown in Tables 4 and 5.
[Table 4]
[Table 5]
[0032]
* 2 The location of the fracture surface is as shown in FIG. Numerical values such as E100 indicate the area ratio (%). In addition, the test body 1 is provided with the layer of the foundation | substrate 21, the primer 22, and the mortar 23, and the steel jig 25 is adhere | attached with the epoxy-type adhesive agent 24 to this.
* 3 Evaluation criteria for adhesion test results are:
A: Base cohesive fracture
B: Base-primer bond interface fracture
C: Primer cohesive fracture
D: Primer-mortar bond interface fracture
E: Mortar cohesive fracture
age,
○: Adhesion strength 1.0 N / mm²The total of fracture surfaces B, C and D is less than 50%
×: Adhesion strength 1.0 N / mm²Less than or the total of fractured surfaces B, C, D is 50% or more
It was.
[0033]
(7) Summary of adhesion test results
1) About Examples 1 and 2
Film formation (curing) after primer application is fast, and even after film formation, only the primer surface is in an uncured state due to polymerization inhibition of the primer surface, so the primer curing period is 1 hour, 5 hours, 1 day, respectively. The test results show stable adhesion.
Even in the adhesion test results of underwater curing, stable adhesion is demonstrated.
Concrete, adhesives, vinyl floor tiles, ceramic tiles, and wood are all showing stable adhesion in the adhesion test results.
[0034]
2) About Comparative Examples 1, 2, and 3
When the primer curing period is 1 hour, the film formation (drying) after primer application is slow, and the primer film is not formed at the time of mortar construction, so that sufficient adhesion is not obtained in the adhesion test results.
In the adhesion test result of the underwater curing, the primer film swells due to moisture and the strength is lowered, so that sufficient adhesion force is not obtained in the adhesion test result.
Adhesive strength is not obtained in the adhesion test results with the foundation other than the concrete foundation.
[0035]
3) About Comparative Example 4
When the curing period of the primer is 1 day, the primer is completely cured and no adhesion force is obtained in the adhesion test result.
[0036]
Example 1, 2, 2, 2, 1, 3, 2, 3 and Comparative Example 1, 2-4, 1, 3-4
Examples 1, 2 and Comparative Examples 1-4 used 1: 3 mortar as described above. Example 1, 2, 2, 2, 1, 3, 2, 3 and 2 of Comparative Example 2, 2-4, 1, 3-4 of Example 1 using a self-leveling material for the mortar layer formed of this 1: 3 mortar 3 is shown below.
[0037]
Primers used
Example 1, 2, 1 and 3 are the same as Example 1 using 1: 3 mortar, Example 2, 2, 2 and 3 are the same as Example 2 using 1: 3 mortar, comparative example 1 of 2, 1 of 3 is the same as Comparative Example 1 using 1: 3 mortar, 2 of Comparative Example 2, 2 of 3 is the same as Comparative Example 2 using 1: 3 mortar, of Comparative Example 3 2, 3 and 3 were the same as Comparative Example 3 using 1: 3 mortar, and 2 and 4 and 3 of Comparative Example 4 were the same as Comparative Example 4 using 1: 3 mortar.
[0038]
Adhesion test using Examples 2, 2, 2, 1, 1, 3, 2, 3 and Comparative Example 1, 2-4, 2, 1-3-4
(1) How to make an adhesion test specimen
It created similarly to Examples 1, 2 and Comparative Examples 1-4 using 1: 3 mortar. However, the applied mortar was a self-leveling material.
[0039]
(2) Preparation method for adhesion test specimen
A concrete base was used, and the preparation method thereof was the same as in Examples 1 and 2 and Comparative Examples 1 to 4 using 1: 3 mortar.
[0040]
(3) Primer application
According to the example of Table 3 above, with respect to primer application, 2, 1 of Example 1, 3 is the same as Example 1 using 1: 3 mortar, 2 of 2, 2 of Example 2 is 1: 3 mortar. Comparative Example 1, 2, 1 and 3 are the same as Comparative Example 1 using 1: 3 mortar, and Comparative Example 2, 2, 2 and 3 are 1: 3 mortar. Comparative Example 2, 2, 3 of Comparative Example 3, 3 is the same as Comparative Example 3 using 1: 3 mortar, Comparative Example 2, 2, 4 of 3 is Comparison using 1: 3 mortar Same as Example 4.
However, the period from primer application to mortar construction (primer curing period) was 1 hour, 5 hours, and 3 days.
[0041]
(4) Self-leveling material used
Cement-based self-leveling materials were used for Examples 2, 2, 2 and Comparative Example 1, 2, 2, 2, 3, 2, 4, 2.
Product name: Taiheiyo SL
Curing time: Setting time (termination) 10 hours 10 minutes
The measurement was performed according to “JASS 15M-103 self-leveling material quality standard”.
For example 3, 3, 2 and 3, and comparative example 1, 3, 2, 3, 3, 3, 4 and 3, fast-hardening cement-based self-leveling material was used.
Formulation: As shown in Table 6 (normal Portland cement as 100 parts by weight)
[Table 6]
Curing time: Setting time (termination) 3 hours
The measurement was performed according to “JASS 15M-103 self-leveling material quality standard”.
[0042]
▲ 5 ▼ Mortar curing
Mortar curing was standard curing, and after mortar molding, curing was performed for 7 days under conditions of a temperature of 20 ° C. and a humidity of 60%.
[0043]
(6) Bond strength measurement
The same as Examples 1 and 2 and Comparative Examples 1 to 4 using 1: 3 mortar.
[0044]
(7) Results of adhesion strength measurement
The adhesion strength measurement results are shown in Table 7 and Table 8.
[Table 7]
[Table 8]
[0045]
* 2 The location of the fracture surface is as shown in FIG. Numerical values such as E100 indicate the area ratio (%). In addition, the test body 1 is provided with the layer of the foundation | substrate 21, the primer 22, and the mortar 23, and the steel jig 25 is adhere | attached with the epoxy-type adhesive agent 24 to this.
* 3 Evaluation criteria for adhesion test results are:
A: Base cohesive fracture
B: Base-primer bond interface fracture
C: Primer cohesive fracture
D: Primer-mortar bond interface fracture
E: Mortar cohesive fracture
age,
○: Adhesion strength 1.0 N / mm²The total of fracture surfaces B, C and D is less than 50%
×: Adhesion strength 1.0 N / mm²Less than or the total of fractured surfaces B, C, D is 50% or more
It was.
[0046]
(7) Summary of adhesion test results
1) Regarding Example 1, 2, 1, 3, 2, 2, 2, 3
Film formation (curing) after primer application is fast, and even after film formation, only the primer surface is in an uncured state due to polymerization inhibition of the primer surface, so that the primer curing period is 1 hour, 5 hours, 3 days, respectively. The test results show stable adhesion.
When a fast-curing self-leveling material is used, a cured body of the self-leveling material that is integrated with the substrate is obtained 4 hours after primer application (the time required from the primer application to the completion of condensation of the fast-curing self-leveling material). It was.
[0047]
2) About Comparative Example 1, 2, 1, 3, 2, 2, 2, 3, 3, 2, 3, 3
When the primer curing period is 1 hour, the film formation (drying) after primer application is slow, and the primer film is not formed during mortar construction, so that sufficient adhesion is not obtained in the adhesion test results.
Even when the fast-curing self-leveling material was used, a cured product of the self-leveling material integrated with the base was not obtained after 4 hours from the primer application.
[0048]
3) For Comparative Example 4, 2, 4 and 3
When fast curing self-leveling material is applied with a primer curing period of 1 hour, the fast-curing self-leveling material cures faster than the primer. Therefore, no adhesion force is obtained in the adhesion test results.
When the curing period of the primer is 3 days, the primer is completely cured and no adhesion force is obtained in the adhesion test result.
[0049]
Other embodiments
Although the present invention has been described with respect to the above-described embodiments, the present invention is not limited to such embodiments, and all modifications, changes, and additions obvious to those skilled in the art are technical aspects of the present invention. Included in the range.
[0050]
【The invention's effect】
  As is apparent from the above, according to the present invention, by having high water resistance, alkali resistance and strong cohesion, it has a high and stable adhesive force,Using cementEven if the process of transferring concrete or mortar is delayed for some reason, a cement construction primer that maintains excellent adhesive strength, a cement construction method using the cement construction primer, and the cement construction method The resulting cement structure is provided.
[0051]
  That is, as described above, since the time required for forming a film after application is short, the work period can be shortened, and the work period can be further shortened by a combination with fast-curing and quick-drying mortar, which has recently been increasing in demand. As described above, compatibility with the self-leveling material is also good.
  Moreover, even if it takes several days to transfer the new concrete or mortar after forming the film, the film itself cures quickly, but after forming the film, only the primer surface becomes uncured due to polymerization inhibition of the primer surface. is there. For this reason, it has high adhesive strength.
  In addition, the groundworkUsing cementMaterials other than concrete or mortar, such as ceramic materials, vinyl chloride resin, vinyl chloride-vinyl acetate copolymer resin, vinyl acetate resin or vinyl copolymer resin, rubber latex, epoxy resin, polyurethane, unsaturated polyester resin, metal, High adhesion to wood materials.
[0052]
When renovating interior finish materials for building structures, when adjusting the smoothness of the foundation with mortar when installing new interior finish materials, the existing interior finish material and the adhesive that has been pasted on it are used. After the removal, the substrate is adjusted with mortar. However, when the present invention is used, it becomes possible to perform groundwork adjustment with mortar without peeling off the existing interior finishing material or the adhesive that has been affixed thereto, and construction in a short period is often required. The construction period (especially stores) for interior finishing materials can be greatly reduced.
[Brief description of the drawings]
FIG. 1 is a conceptual diagram illustrating the attachment of a steel jig to an adhesion test specimen when measuring adhesion strength.
FIG. 2 is a cross-sectional view showing a fracture position of an adhesion test body when adhesion strength is measured.
[Explanation of symbols]
1 Adhesion test specimen
21 Groundwork
22 Primer
23 Mortar
24 Epoxy adhesive
25 Steel jig

Claims (7)

A primer for cement construction comprising epoxy acrylate, a promoter selected from organometallic acids and tertiary amines , and a curing agent containing a catalyst comprising a peroxide , and used when casting concrete or mortar using cement. . The main agent which mix | blended 10-250 weight part of styrene monomers with respect to 100 weight part of epoxy acrylates, and the hardening | curing agent containing the catalyst which consists of a promoter chosen from organometallic acid and a tertiary amine, and a peroxide. Primer for cement construction. The primer for cement construction according to claim 1 or 2, wherein the peroxide is an organic peroxide .   The primer for cement construction according to any one of claims 1 to 3, wherein the epoxy acrylate is a bisphenol epoxy acrylate or a novolac epoxy acrylate.   A cement construction method comprising applying the cement construction primer according to any one of claims 1 to 4 on a base, and then applying uncured mortar or uncured concrete.   A cement construction method comprising applying the cement construction primer according to any one of claims 1 to 4 on a base, and then applying a self-leveling material.   A cement structure constructed by carrying out the cement construction method according to claim 5 or 6.