JP2020196895A - Coking material composition, coking material, adhesive anchor and installation method of coking material - Google Patents

Abstract

To provide a coking material composition capable of reducing degradation of adhesive strength of a chemical anchor based on hydrolysis of an adhesion resin, a coking material, an adhesion anchor and an installation method of the coking material.SOLUTION: A first coking material 16 is a coking material composition sealing an adhesive resin 15 of an adhesion-based anchor 1A by fixing by adhering an anchor bolt 10 to an anchor insertion hole 12, after inserting the anchor bolt 10 into the anchor insertion hole 12, contains an elastic resin containing an elastic epoxy-based resin having viscosity immediately after mixing an epoxy resin as a main agent and a curing agent of 200 Pa s or larger and 2000 Pa s or smaller, and a fluorine-based heat resistant resin.SELECTED DRAWING: Figure 2A

Description

The present invention relates to a method for constructing a caulking material composition, a caulking material, an adhesive anchor and a caulking material, for example, applying a caulking material composition, a caulking material, an adhesive anchor and a caulking material that can be suitably applied to an adhesive anchor. Regarding the method.

Conventionally, a method for fixing a post-construction anchor to an anchor insertion hole drilled in an existing concrete structure has been proposed (see, for example, Patent Document 1). After that, in the method of fixing the construction anchor, after filling the anchor insertion hole with a plastic grout material, a storage container filled with the grout material is communicated and brought into close contact with the concrete structure. Then, by inserting the anchor bolt into the anchor insertion hole, the anchor bolt is fixed in the anchor insertion hole. As a result, it is possible to prevent air from being mixed into the grout material in the anchor insertion hole, so that it is possible to prevent deterioration of the quality of the post-construction anchor.

Japanese Unexamined Patent Publication No. 2015-28267

By the way, in the adhesive anchor, which is one of the post-construction anchors, a thermosetting resin having a hydrolyzable functional group such as an ester bond and a urethane bond fixes the adhesive anchor in the anchor insertion hole (grout material). It is often used as an adhesive resin). For this reason, with conventional adhesive anchors, if they are installed in places that may be constantly exposed to water, such as tunnel ceilings, or places that may be intermittently exposed to water vapor, such as chemical plants, they will be thermoset over time. In some cases, the hydrolysis of the sex resin proceeded and the adhesive strength of the adhesive anchor decreased.

The present invention has been made in view of such circumstances, and is a caulking material composition, a caulking material, an adhesive anchor and a caulking material capable of reducing a decrease in the adhesive strength of the adhesive anchor due to hydrolysis of the adhesive resin. The purpose is to provide a construction method for.

The caulking material composition of the present invention is a caulking material composition that seals the adhesive resin of the adhesive anchor that fixes the anchor bolts by adhering them to the anchor insertion holes after inserting the anchor bolts into the anchor insertion holes. It is characterized by containing at least one elastic resin selected from the group consisting of an epoxy resin and a polysulfide resin.

According to the caulking material composition of the present invention, by applying the caulking material composition having a low water permeability to the gaps between the adhesive anchors, it is possible to prevent the invasion of water into the adhesive resin, so that high temperature water vapor can be prevented. Even in an environment exposed to water, it is possible to prevent hydrolysis of the adhesive resin after curing, and it is possible to prevent a decrease in the adhesive strength of the adhesive anchor.

In the caulking material composition of the present invention, the elastic resin preferably has a 25% strain tensile stress after curing of 0.1 MPa or more and 30 MPa or less. With this configuration, for example, even when the caulking material is applied to the plant equipment, it is possible to prevent a decrease in the water vapor shielding effect due to damage such as cracks in the caulking material to which the caulking material composition is applied due to vibration of the plant equipment itself or an earthquake. be able to.

In the caulking material composition of the present invention, the elastic resin preferably contains a main agent of the epoxy resin and an amine curing agent. With this configuration, the hydrolyzability of the elastic resin is lowered and the protective function of the adhesive anchor is enhanced, so that it is possible to further prevent the adhesive strength of the adhesive anchor from being lowered due to the hydrolysis of the adhesive resin.

The caulking material composition of the present invention is a caulking material composition that seals the adhesive resin of an adhesive anchor that fixes the anchor bolts by adhering them to the anchor insertion holes after inserting the anchor bolts into the anchor insertion holes. It is characterized by containing at least one selected from the group consisting of low-viscosity epoxy resins.

According to the coking material composition of the present invention, the low-viscosity epoxy resin is used for the gap between the anchor bolt and the nut, the gap between the nut and the fastening portion, the gap between the anchor bolt and the fastening portion, and the fastening portion and the concrete. By injecting into various gaps such as between wall surfaces, it is possible to prevent moisture from entering the adhesive resin of the adhesive anchor, so it is possible to further suppress the hydrolysis of the adhesive resin, and it becomes a high-temperature steam. Even when exposed, it is possible to prevent a decrease in the adhesive strength of the adhesive anchor.

In the caulking material composition of the present invention, the low-viscosity epoxy resin preferably has a viscosity of 50 Pa · s or less. With this configuration, the low-viscosity epoxy resin before curing has an appropriate fluidity range, so that it is easy to inject the adhesive anchor into various gaps and the like, and hydrolysis of the adhesive resin can be further suppressed.

The caulking material of the present invention is characterized in that the caulking material composition is cured.

According to the caulking material of the present invention, by applying the caulking material composition to various gaps of the adhesive anchor, it is possible to prevent the invasion of water into the adhesive resin. Further, by caulking an elastic resin containing at least one selected from the group consisting of an epoxy resin and a polysulfide resin so as to cover the adhesive anchor construction portion, the environment is exposed to high temperature steam. However, since the hydrolysis of the adhesive resin after curing can be prevented, it is possible to prevent a decrease in the adhesive strength of the adhesive anchor.

The adhesive anchor of the present invention is characterized by including an adhesive anchor main body and a third caulking material obtained by curing the caulking material composition applied to the adhesive anchor main body.

According to the adhesive anchor of the present invention, the low-viscosity elastic epoxy resin can prevent moisture from entering the adhesive resin through various gaps of the adhesive anchor, so that the hydrolysis of the adhesive resin can be suppressed. Therefore, even when exposed to high-temperature steam, it is possible to prevent a decrease in the adhesive strength of the adhesive anchor.

The adhesive anchor of the present invention is characterized by comprising an adhesive anchor main body and a first caulking material obtained by curing the caulking composition applied to the adhesive anchor main body.

According to the adhesive anchor of the present invention, by applying a caulking material composition having a low water permeability so as to cover the adhesive anchor construction portion, it is possible to prevent the invasion of water into the adhesive resin, so that the temperature is high. Even in an environment exposed to water vapor, it is possible to prevent the adhesive resin from being hydrolyzed after curing, and it is possible to prevent a decrease in the adhesive strength of the adhesive anchor.

The adhesive anchor of the present invention has an adhesive anchor body, a first caulking material obtained by curing the caulking composition applied to the adhesive anchor body, and the caulking material composition on the adhesive anchor body. It is characterized by having a third caulking material that has been constructed.

According to the adhesive anchor of the present invention, by applying a caulking material composition having a low water permeability so as to cover the adhesive anchor construction portion, it is possible to prevent the invasion of water into the adhesive resin, so that the temperature is high. Even in an environment exposed to water vapor, it is possible to prevent the adhesive resin from being hydrolyzed after curing, and it is possible to prevent a decrease in the adhesive strength of the adhesive anchor. In addition, since the low-viscosity epoxy resin can prevent moisture from entering the adhesive resin through various gaps in the adhesive anchor, it is possible to suppress the hydrolysis of the adhesive resin and it is exposed to high-temperature steam. Even in this case, it is possible to prevent a decrease in the adhesive strength of the adhesive anchor.

In the adhesive anchor of the present invention, it is preferable to further include a second caulking material formed by curing the heat-resistant resin-containing caulking material composition applied on the first caulking material. With this configuration, since the second caulking material containing a heat-resistant resin is provided so as to cover the first caulking material, the first caulking material can be protected even in an environment exposed to high-temperature steam. .. As a result, hydrolysis of the adhesive resin after curing can be prevented more effectively, and it is possible to prevent a decrease in the adhesive strength of the adhesive anchor.

The method for applying the caulking material of the present invention is characterized by including a first step of applying the caulking material composition as a third caulking material to the adhesive anchor body.

The adhesive anchor of the present invention is characterized by including a step of applying the caulking material composition as a first caulking material to the adhesive anchor main body.

According to the adhesive anchor of the present invention, by applying a caulking material composition having a low water permeability to various gaps of the adhesive anchor, it is possible to prevent the invasion of water into the adhesive resin, so that high temperature water vapor can be used. Even in an environment exposed to water, it is possible to prevent hydrolysis of the adhesive resin after curing, and it is possible to prevent a decrease in the adhesive strength of the adhesive anchor.

The adhesive anchor of the present invention preferably includes, after the first step, a second step of applying the caulking material composition to the adhesive anchor body as the first caulking material. With this configuration, by constructing a caulking material composition having a low moisture permeability so as to cover the adhesive anchor construction portion, it is possible to prevent the invasion of moisture into the adhesive resin, so that the adhesive is exposed to high-temperature steam. Even in an environment, it is possible to prevent hydrolysis of the adhesive resin after curing, and it is possible to prevent a decrease in the adhesive strength of the adhesive anchor. In addition, since the low-viscosity epoxy resin can prevent moisture from entering the adhesive resin through the gaps in the adhesive anchor, it is possible to suppress the hydrolysis of the adhesive resin and when exposed to high-temperature steam. Even so, it is possible to further prevent a decrease in the adhesive strength of the adhesive anchor.

According to the adhesive anchor of the present invention, by applying a caulking material composition having a low water permeability to various gaps of the adhesive anchor, it is possible to prevent the invasion of water into the adhesive resin, so that high temperature water vapor can be used. Even in an environment exposed to water, it is possible to prevent hydrolysis of the adhesive resin after curing, and it is possible to prevent a decrease in the adhesive strength of the adhesive anchor.

The adhesive anchor of the present invention preferably further includes a step of constructing a second caulking material obtained by curing a caulking material composition containing a heat-resistant resin on the first caulking material. With this configuration, since the second caulking material containing a heat-resistant resin is provided so as to cover the first caulking material, the first caulking material can be protected even in an environment exposed to high-temperature steam. .. As a result, hydrolysis of the adhesive resin after curing can be prevented more effectively, and a decrease in the adhesive strength of the anchor bolt can be prevented.

According to the present invention, it is possible to realize a method for constructing a caulking material composition, a caulking material, an adhesive anchor and a caulking material that can reduce a decrease in the adhesive strength of the adhesive anchor due to hydrolysis of the adhesive resin.

FIG. 1 is an explanatory diagram of a general adhesive anchor. FIG. 2A is a schematic cross-sectional view showing an example of an adhesive anchor using the caulking material according to the first embodiment. FIG. 2B is a schematic cross-sectional view showing another example of the adhesive anchor using the caulking material according to the first embodiment. FIG. 3A is a schematic cross-sectional view showing an example of an adhesive anchor using the caulking material according to the second embodiment. FIG. 3B is a schematic cross-sectional view showing another example of the adhesive anchor using the caulking material according to the second embodiment. FIG. 4A is a schematic cross-sectional view showing an example of an adhesive anchor using the caulking material according to the third embodiment. FIG. 4B is a schematic cross-sectional view showing another example of the adhesive anchor using the caulking material according to the third embodiment. FIG. 4C is a schematic cross-sectional view showing another example of the adhesive anchor using the caulking material according to the third embodiment. FIG. 5 is a flow chart showing an outline of a method for constructing a caulking material according to an embodiment of the present invention. FIG. 6A is an explanatory diagram of a method of constructing a caulking material according to an embodiment of the present invention. FIG. 6B is an explanatory diagram of a method of constructing a caulking material according to an embodiment of the present invention. FIG. 6C is an explanatory diagram of a method of constructing a caulking material according to an embodiment of the present invention. FIG. 6D is an explanatory diagram of a method of constructing a caulking material according to an embodiment of the present invention. FIG. 7 is a schematic cross-sectional view of the adhesive anchor according to the embodiment of the present invention.

FIG. 1 is an explanatory diagram of a general adhesive anchor 100. The adhesive anchor 100 shown in FIG. 1 is used at a plant site such as a nuclear power plant. In this adhesive anchor 100, an adhesive capsule in which a liquid pre-curing resin (for example, a thermosetting resin) and a curing agent are sealed is arranged in an anchor insertion hole 102 provided in the wall surface 101a of the existing concrete 101. After that, the anchor bolt 103 attached to the electric drill (not shown) is inserted, and the electric drill is rotated to break the adhesive capsule, thereby hardening the gap S100 between the anchor insertion hole 102 and the anchor bolt 103. A mixture of the previous curable resin and hardener is filled. Then, after a certain curing period elapses, the curable resin is cured to become an adhesive resin 104, and the nut 106 is tightened and fixed to the anchor bolt 103 via the fastening portion 105 for fixing the desired device. The desired equipment can be fixed to the wall surface 101a of the existing concrete 101.

By the way, the adhesive anchor 100 is fixed to the wall surface 101a of the existing concrete 101 by the adhesive resin 104 obtained by mixing and curing a curable resin as a main agent and a curing agent. Since many of the adhesive resins 104 contain ester bonds and urethane bonds in their molecules, when the adhesive resin 104 is exposed to water vapor, the adhesive resin 104 is hydrolyzed and the adhesive strength of the adhesive anchor 100 is lowered. There is.

The present inventors are installed on the adhesive anchor 100, such as a gap between the fastening portion 105 and the anchor bolt 103, a gap between the anchor bolt 103 and the nut 106, and a gap between the fastening portion 105 and the wall surface 101a of the existing concrete 101. We focused on the caulking material that seals the gaps between the bolts. Then, the present inventors seal various gaps of the adhesive anchor 100 with a coking material using an elastic resin having excellent moisture-blocking property, heat resistance, and adhesiveness to concrete and metal. We have found that the decrease in the adhesive strength of the anchor bolt 103 in a high humidity environment can be reduced even after a long period of time, and have completed the present invention.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the present invention is not limited to the following embodiments, and can be modified as appropriate. In addition, the following embodiments can be combined as appropriate. In addition, the components common to each embodiment are designated by the same reference numerals to avoid duplication of description.

(First Embodiment)
FIG. 2A is a schematic cross-sectional view showing an example of an adhesive anchor using a caulking material according to the first embodiment of the present invention. As shown in FIG. 2A, in the adhesive anchor 1A according to the present embodiment, an anchor bolt 10 having one end inserted into an anchor insertion hole 12 provided in the wall surface 11a of the concrete 11 and an anchor bolt 10 are inserted into the anchor bolt 10. A curable resin (for example,) filled between the nut 13 fixed in the hole 12, the fastening portion 14 provided between the nut 13 and the wall surface 11a of the concrete 11, the anchor bolt 10, and the anchor insertion hole 12. An adhesive resin 15 made of a heat-curable resin or the like) and a first coking material 16 containing an elastic resin having low water vapor permeability and flexibility are provided. For example, the fastening portion 14 fastens the device attached to the existing concrete 11 by the additional work to the adhesive anchor 1A. The first caulking material 16 includes a first caulking material 161 provided so as to cover the upper surfaces of the anchor bolt 10 and the nut 13, and a first caulking material 162 provided so as to cover the outer edge portion of the fastening portion 14. ..

The upper surface of the first caulking material 161 has a predetermined height H1 (for example, 5 mm or more) from the upper end of the anchor bolt 10. Further, the first caulking material 161 has an outer edge having a predetermined width W1 (for example, 15 mm or more) from the outer edge of the nut 13. Further, the upper surface of the first caulking material 162 has a predetermined height H2 (for example, 5 mm or more from the upper surface 14a of the fastening portion 14). Further, the first caulking material 162 has a predetermined width W2 (for example, 15 mm or more or twice or more the thickness T1 of the fastening portion) on the outside from the edge 14b of the fastening portion 14, and the edge 14b of the fastening portion 14 It has a predetermined width W3 (for example, 15 mm or more or twice or more the thickness T1 of the fastening portion) from the inside. By providing the first caulking material 161 in this way, the gap S1 between the anchor bolt 10 and the nut 13, the gap S2 between the nut 13 and the fastening portion 14, and the gap between the anchor bolt 10 and the fastening portion 14 are provided. The gap S3 can be closed, and the contact of moisture from the gaps S1, S2 and S3 to the adhesive resin 15 can be prevented. Further, by providing the first caulking material 162 in this way, the gap S4 between the fastening portion 14 and the wall surface 11a of the concrete 11 can be closed, and the contact of moisture from the gap S4 to the adhesive resin 15 can be prevented. It becomes possible.

FIG. 2B is a schematic cross-sectional view showing another example of the adhesive anchor using the caulking material according to the present embodiment. In the example shown in FIG. 2B, in the adhesive anchor 1B, the anchor bolt 10 and the nut 13 are provided so that the first caulking material 16 is connected between the first caulking material 161 and the first caulking material 162 shown in FIG. 2A. It is provided so as to cover the outer edge portion of the fastening portion 14 from the upper surface of the fastening portion 14. The upper surface of the first caulking material 161 has a predetermined height H1 (for example, 5 mm or more) from the upper end of the anchor bolt 10. Further, the upper surface of the first caulking material 162 has a predetermined height H2 (for example, 5 mm or more from the upper surface 14a of the fastening portion 14). Further, the first caulking material 162 has a predetermined width W2 (for example, 15 mm or more or twice or more the thickness T1 of the fastening portion) on the outside from the edge 14b of the fastening portion 14. By providing the first caulking material 161 in this way, the gap S1 between the anchor bolt 10 and the nut 13 and the gap S2 between the nut 13 and the fastening portion 14 and the anchor are similar to the example shown in FIG. 2A. The gap S3 between the bolt 10 and the fastening portion 14 and the gap S4 between the fastening portion 14 and the wall surface 11a of the concrete 11 can be closed, and the moisture from the gap S1 to the adhesive resin 15 through the gap S4 can be closed. It is possible to prevent contact. Further, as in the example shown in FIG. 2A, the first caulking material 16 can be provided integrally without providing the first caulking material 161 and the first caulking material 162 separately, so that the first caulking material 16 can be provided. This facilitates the construction of the above, and is particularly effective when the fastening portion 14 is small.

As the elastic resin of the first caulking material 16, at least one elastic resin selected from the group consisting of an epoxy resin and a polysulfide resin is used. As the epoxy resin, various conventionally known epoxy resins can be used as long as they satisfy the above-mentioned tensile elastic modulus. Among these, as the epoxy resin, a two-component curing type epoxy resin is preferable, and from the viewpoint of low hydrolyzability and enhanced protection function of the adhesive anchors 1A and 1B, two-component curing using an amine-based curing agent is performed. Type epoxy resin is more preferable. One of these epoxy resins may be used alone, or two or more thereof may be used in combination.

Since the epoxy resin has a polar group such as a hydroxyl group in its molecular structure, excellent adhesive strength can be obtained by hydrogen bonding with a hydroxyl group on the surface of concrete and metal. Further, by using the epoxy resin, high heat resistance can be obtained, and the gaps S1, S2 and S3 of the adhesive anchor 1A can be closed with the caulking material containing the epoxy resin, so that the water vapor permeability is lowered. .. Further, since various caulking materials containing epoxy resins having different viscosities are put on the market, it is easy to adjust the fluidity of the first caulking material 16 before curing within an appropriate range. Easy to install. As the epoxy resin, for example, an elastic epoxy resin having a viscosity of 200 Pa · s or more and 2000 Pa · s or less immediately after mixing the epoxy resin as the main agent and the curing agent is preferable. Further, since the epoxy resin using the amine-based curing agent does not have a hydrolyzable functional group in the molecular structure, it has low hydrolyzability and can be suitably used as the first caulking material 16.

Examples of the caulking material containing an epoxy resin include trade names: Alpron S-110 and S-742 (manufactured by Japan-US Resin Co., Ltd.), trade name: EP-90 (manufactured by Cemedine Co., Ltd.), and trade name: Loctite E-40FL. And commercially available products such as E-90FL (manufactured by Henkel Japan Ltd.) can be used, but the present invention is not limited thereto.

As the polysulfide resin, various conventionally known polysulfide resins can be used as long as they satisfy the above tensile elastic modulus. One of these polysulfide-based resins may be used alone, or two or more of them may be used in combination. The polysulfide-based resin has a higher water vapor shielding property than the epoxy-based resin, and the epoxy-based resin has a higher heat-resistant temperature than the polysulfide-based resin. As the first caulking material 16, an epoxy resin and a polysulfide-based resin may be appropriately selected as the first caulking material 16 in consideration of the environmental conditions of the place of construction.

As the polysulfide resin, for example, commercially available products such as trade name: Thiocol LP (manufactured by Toray Fine Adhesive Co., Ltd.) and trade name: Sharpie Seal T-97 (manufactured by Sharp Chemical Industries, Ltd.) can be used. It is not limited to.

The elastic resin preferably has a 25% strain tensile stress after curing of 0.1 MPa or more and 30 MPa or less. If the 25% strain tensile stress is 0.1 MPa or more, the strength of the elastic resin is within the minimum level, so that scratches on the first coking material 16 can be prevented, and the 25% strain tensile stress is 30 MPa or less. If this is the case, since appropriate flexibility can be obtained, damage to the coking material can be prevented even with a large acceleration impact such as an earthquake. The 25% strain tensile stress is more preferably 0.5 MPa or more and 30 MPa or less, and further preferably 0.5 MPa or more and 20 MPa or less. Further, as the elastic resin, an epoxy resin is preferable from the viewpoint of obtaining an excellent water vapor shielding effect even in an environment of 80 ° C. or higher. Further, as the elastic resin, a polysulfide-based resin is preferable from the viewpoint of low water vapor transmittance and strong adhesive force to concrete and metal. The 25% strain tensile stress can be measured in accordance with JIS K 7161 "Plastic-How to determine tensile properties-".

As described above, according to the above embodiment, the gap S1 between the anchor bolt 10 and the nut 13, the gap S2 between the nut 13 and the fastening portion 14, and the gap between the anchor bolt 10 and the fastening portion 14 Since the first coking material 16 is provided so as to close the gap S4 between S3 and the fastening portion 14 and the wall surface 11a of the concrete 11, the adhesive resin after curing is provided even in an environment exposed to high-temperature steam. It is possible to prevent the hydrolysis of 15 and prevent a decrease in the adhesive strength of the anchor bolt 10. Further, since the first caulking material 16 contains an elastic resin having flexibility, for example, even when the first caulking material 16 is applied to the plant equipment, the first caulking material 16 is caused by vibration of the plant equipment itself, an earthquake, or the like. It is possible to prevent a decrease in the water vapor shielding effect due to damage such as cracks in the water. Further, since the first coking material 16 contains at least one of a flexible elastic epoxy resin and an elastic polysulfide resin, the concrete 11 and the nut which are the construction surfaces even in an environment exposed to vibration. Adhesion to stainless steel such as 13 and the fastening portion 14 and metal such as carbon steel is also good.

In the examples shown in FIGS. 2A and 2B, an example in which the first caulking material 16 is applied to the adhesive resin 15 provided on the horizontal plane has been described, but the adhesive resin 15 and the first caulking material 16 are It can also be installed on the ceiling surface and the wall surface perpendicular to the horizontal plane. Even in this case, in the present embodiment, the fluidity can be set in an appropriate range by using an elastic resin having a predetermined viscosity immediately after mixing the main agent and the curing agent, so that the ceiling surface and the ceiling surface and It can also be suitably applied to a wall surface perpendicular to the horizontal plane.

(Second Embodiment)
FIG. 3A is a schematic cross-sectional view showing an example of an adhesive anchor using a caulking material according to a second embodiment of the present invention. As shown in FIG. 3A, the adhesive anchor 2A according to the present embodiment is provided on the first caulking material 16 in addition to the configuration of the adhesive anchor 1A shown in FIG. 2A, and contains a heat-resistant resin. The second caulking material 17 is provided. The second caulking material 17 includes a second caulking material 171 provided so as to cover the first caulking material 161 and a second caulking material 172 provided so as to cover the first caulking material 162. As the heat-resistant resin used for the second caulking material 17, a flexible elastic resin is preferable from the viewpoint of preventing a decrease in the water vapor shielding effect due to cracks and damage caused by vibration and earthquake of the plan device itself.

The thickness T2 of the second caulking material 171 is preferably 2 mm or more and 5 mm or less. When the thickness T2 is 2 mm or more, sufficient heat resistance can be obtained, and when the thickness T2 is 5 mm or less, the heat-resistant resin required for construction can be reduced to reduce the cost. The thickness T3 of the second caulking material 172 is preferably 2 mm or more and 5 mm or less. When the thickness T3 is 2 mm or more, sufficient heat resistance can be obtained, and when the thickness T3 is 5 mm or less, the heat-resistant resin required for construction can be reduced to reduce the cost. By providing the second caulking material A172 and the second caulking material 172 in this way, the first caulking material 161 and the first caulking material 162 can be protected from heat, so that when exposed to steam in a high temperature environment. However, it is possible to further prevent a decrease in the adhesive strength of the adhesive anchor 2A.

FIG. 3B is a schematic cross-sectional view showing another example of the adhesive anchor using the caulking material according to the present embodiment. In the adhesive anchor 2B shown in FIG. 3B, the second caulking material 17 is provided so as to cover the first caulking material 16 shown in FIG. 2B. The thickness T4 of the second caulking material 17 is preferably 2 mm or more and 5 mm or less. When the thickness T4 is 2 mm or more, sufficient heat resistance can be obtained, and when the thickness T4 is 5 mm or less, the heat-resistant resin required for construction can be reduced to reduce the cost. As in the example shown in FIG. 3A, since the second caulking material 17 can be provided integrally without separately providing the second caulking material 171 and the second caulking material 172, the construction of the second caulking material 17 can be performed. This is easy, and is particularly effective when the fastening portion 14 is small.

In the present embodiment, as the second caulking material 17, at least one heat-resistant resin selected from the group consisting of fluororubber and silicone-based resin is preferable. The fluororubber may contain a fluororesin. Further, as the heat-resistant resin, those having a 25% strain tensile stress after curing of 0.1 MPa or more and 30 MPa or less are more preferable. If the 25% strain tensile stress of the heat-resistant resin is 0.1 MPa or more, the strength of the heat-resistant resin falls within the minimum level, so that scratches on the second coking material 17 can be prevented, and 25%. When the strain-tensile stress is 30 MPa or less, appropriate flexibility can be obtained, so that the second coking material 17 can be prevented from being damaged even by an impact of a large acceleration such as an earthquake. Further, as the heat-resistant resin, at least one selected from the group consisting of silicone resin and fluororubber and fluororubber containing fluororesin is preferable from the viewpoint of excellent heat resistance, and it is excellent in heat resistance and moisture shielding property. From an excellent viewpoint, fluororubber and fluororubber containing fluororesin are more preferable. As described above, by using the heat-resistant resin, it is possible to prevent the first caulking material 16 from being directly exposed to the high temperature environment and water vapor, so that the hydrolysis of the adhesive resin can be prevented more effectively. It will be possible. The 25% strain tensile stress of the heat-resistant resin can be measured under the same conditions as the elastic resin described above.

As the fluororubber, conventionally known various fluororubbers and fluororubbers containing fluororesin can be used. As the fluororubber, those satisfying the above-mentioned 25% strain tensile stress are preferable. One type of these fluorine-based rubbers may be used alone, or two or more types may be used in combination.

Examples of fluororubber include trade names: Eight Seal (registered trademark) F-101H, F-103, F-106, F-150L and F-113 (manufactured by Taihei Kasei Co., Ltd.), FC-700 (manufactured by Hermetic Co., Ltd.). Etc. can be used, but the present invention is not limited to these.

As the silicone-based resin, various conventionally known silicone-based resins can be used. As the silicone-based resin, those satisfying the above-mentioned 25% strain tensile stress are preferable. One of these silicone-based resins may be used alone, or two or more thereof may be used in combination.

As the silicone-based resin, for example, commercially available products such as trade names: Sealant 45, Sealant Master 300 and KE-3418 (manufactured by Shin-Etsu Silicone Co., Ltd.) can be used, but the silicone-based resin is not limited thereto.

As described above, according to the above embodiment, since the second caulking material 17 containing the heat-resistant resin is provided so as to cover the first caulking material 16, even in an environment exposed to high-temperature steam. The first caulking material 16 can be protected. As a result, hydrolysis of the adhesive resin 15 after curing can be prevented more effectively, and a decrease in the adhesive strength of the anchor bolt 10 can be prevented.

(Third Embodiment)
FIG. 4A is a schematic cross-sectional view showing an example of an adhesive anchor using a caulking material according to a third embodiment of the present invention. As shown in FIG. 4A, in addition to the configuration of the adhesive anchor 2A shown in FIG. 3A, the adhesive anchor 3A has a gap S1 between the anchor bolt 10 and the nut 13 and a space between the nut 13 and the fastening portion 14. The gap S2, the gap S3 between the anchor bolt 10 and the fastening portion 14, and the gap S4 between the fastening portion 14 and the concrete 11 are filled with a third caulking material 18 containing a low-viscosity epoxy resin. By enclosing the third caulking material 18, it is possible to prevent moisture from entering the adhesive resin 15 from the gap S1 through the gap S4, so that hydrolysis of the adhesive resin 15 can be prevented even more effectively. This makes it possible to prevent a decrease in the adhesive strength of the adhesive anchor 3A. As the low-viscosity epoxy resin, those using an amine-based curing agent are preferable.

FIG. 4B is a schematic cross-sectional view showing another example of the adhesive anchor using the caulking material according to the third embodiment of the present invention. In the adhesive anchor 3B shown in FIG. 4B, the second caulking material 17 (second caulking material 171 and second caulking material 172) is omitted as compared with the example shown in FIG. 4A. In this way, even when the second caulking material 17 is omitted, for example, when the environmental temperature to which the adhesive anchor 3B is exposed is lower than that of the adhesive anchor 3A, the third caulking material 18 is separated from the gap S1. Since it is filled in S4, it is possible to effectively prevent a decrease in the adhesive strength of the adhesive anchor 3B due to the hydrolysis of the adhesive resin 15.

FIG. 4C is a schematic cross-sectional view showing another example of the adhesive anchor using the caulking material according to the third embodiment of the present invention. In the adhesive anchor 3C shown in FIG. 4C, the first caulking material 16 (first caulking material 161 and first caulking material 162) is omitted as compared with the example shown in FIG. 4B. Even when the first caulking material 16 is omitted in this way, for example, when the water vapor pressure to which the adhesive anchor 3C is exposed is lower than that of the adhesive anchor 3B, or when the period of exposure to water vapor is short. Since the third caulking material 18 is filled from the gap S1 to the gap S4, it is possible to effectively prevent a decrease in the adhesive strength of the adhesive anchor 3C due to the hydrolysis of the adhesive resin 15. Which of the adhesive anchors 3A to 3C of FIGS. 4A to 4C is used can be appropriately determined according to the usage environment (vapor pressure, temperature, exposure period) of the adhesive anchors.

As the low-viscosity epoxy resin, an epoxy resin that cures by mixing a main agent and a curing agent is used. Further, the low-viscosity elastic epoxy resin preferably has a viscosity of 50 Pa · s or less immediately after mixing the main agent and the curing agent, more preferably more than 0.01 Pa · s and 50 Pa · s or less, and 0. It is more preferably more than 01 Pa · s and 30 Pa · s or less. When the viscosity is 50 Pa · s or less, filling from the gap S1 to the gap S4 becomes easy. Further, as the low-viscosity epoxy resin, those using an amine-based curing agent are preferable from the viewpoint of low hydrolyzability. When the adhesive anchor is provided on the vertical surface, it is preferable that the third caulking material 18 has thixotropy property from the viewpoint of preventing liquid leakage from the filling to the completion of curing. The viscosity of the low-viscosity epoxy resin can be measured in accordance with JIS K 7233 "Viscosity test method for epoxy resin and curing agent".

As the low-viscosity epoxy resin, a low-viscosity epoxy resin having a 25% strain tensile stress after curing of 0.1 MPa or more and 30 MPa or less is preferable. If the 25% strain tensile stress is 0.1 MPa or more, the strength of the low-viscosity epoxy resin is within the minimum level, so that scratches on the third coking material 18 can be prevented, and the 25% strain tensile stress can be prevented. When the value is 30 MPa or less, appropriate flexibility can be obtained, so that damage to the coking material can be prevented even with a large acceleration impact such as an earthquake. The 25% strain tensile stress of the low-viscosity epoxy resin is more preferably 0.5 MPa or more and 30 MPa or less, and further preferably 0.5 MPa or more and 20 MPa or less. The 25% strain tensile stress can be measured in accordance with JIS K 7161 "Plastic-How to determine tensile properties-".

As the low-viscosity epoxy resin, various conventionally known epoxy resins can be used as long as the main agent and the curing agent are mixed and cured. Further, as the low-viscosity epoxy resin, those satisfying the above-mentioned viscosity are preferable. One of these low-viscosity epoxy resins may be used alone, or two or more thereof may be used in combination.

Examples of the low-viscosity epoxy resin include, but are not limited to, trade names: E207D, E2420 and E2420D (manufactured by Konishi), and trade names: Hermetite KE-50F (manufactured by Hermetic). ..

As described above, according to the above embodiment, the third caulking material 18 containing the low-viscosity epoxy resin is filled in the gap S1 through the gap S4, so that the moisture adhesive resin 15 is filled from the gap S1 through the gap S4. It is possible to prevent invasion into. As a result, the hydrolysis of the adhesive resin 15 can be suppressed, so that it is possible to prevent a decrease in the adhesive strength of the adhesive anchors 3A to 3C even when exposed to high-temperature water vapor.

Next, a method of constructing the caulking material according to the present embodiment will be described. FIG. 5 is a flow chart showing an outline of a caulking material construction method according to the present embodiment. As shown in FIG. 5, in the method of constructing the caulking material according to the present embodiment, the first step ST11 for removing the nut of the existing adhesive anchor and the third caulking material are filled in various gaps of the existing adhesive anchor. The second step ST12, the third step ST13 for fastening the nut of the existing adhesive anchor, the fourth step ST14 for applying the first caulking material to the adhesive anchor to which the nut is fastened, and the first caulking material are constructed. The fifth step ST15 of applying the second caulking material to the adhesive anchor is included. In the following, an example of applying the first caulking material, the second caulking material, and the third caulking material to the existing adhesive anchor will be described, but the method of applying the caulking material according to the present embodiment will be newly established. It can also be applied to adhesive anchors.

6A to 6D are explanatory views of a method of constructing a caulking material according to the present embodiment. Here, a method of constructing the adhesive anchor 3A using the caulking material according to the third embodiment described above will be described. As shown in FIG. 6A, in the method of constructing the caulking material according to the present embodiment, first, the area where the caulking material is applied, such as the wall surface 11a of the concrete 11 provided with the existing adhesive anchor and the surface of the fastening portion 14, Thoroughly remove dust, debris, latency, oil, rust and paint. Here, if necessary, a sander, a wire brush, a brush, a waste cloth containing an air duster and thinner, or the like is used. Further, the above treatment may be performed by removing the nut from the bolt if necessary. Further, the paint on the construction part of the caulking material is peeled off and removed. Further, the caulking material on the metal surface is degreased by removing the coating film, roughening the metal surface with sandpaper or the like, and then wiping with a waste cloth soaked with a solvent.

In the case of applying to the existing adhesive anchor, after removing the nut of the existing adhesive anchor, the third caulking material 18 is filled with a tool such as a syringe 20. For example, after filling the outer cylinder 21 with the third caulking material 18, by pressing the inner cylinder 22, the third caulking material 18 is injected into the gap S3 between the anchor bolt 10 and the fastening portion 14 and filled. To do. When the third caulking material 18 seeps out from the end of the gap S3 or the gap S4 between the wall surface 11a of the concrete 11 and the fastening member 14, the injection of the third caulking material 18 is stopped. For example, 30 mm to 80 ml of the third caulking material 18 may be injected per construction site. When the area of the fastening portion 14 is large, the third caulking material 18 is injected not only from the anchor bolt 10 side into the gap S4 but also from the outer peripheral side of the fastening portion 14 into the gap S4 with a syringe 20. You may.

Next, as shown in FIG. 6B, after the third caulking material 18 is filled in the gap S3 and the gap S4, before the filled third caulking material 18 is cured, the outer edge portion of the anchor bolt 10 in the fastening portion 14 is covered. After applying the third caulking material 18, the nut 13 is fastened to the anchor bolt 10 and allowed to stand. As a result, the gap S1 and the gap S2 are also filled with the third caulking material 18, and the adhesive anchor 3C according to the third embodiment described above is obtained.

Next, as shown in FIG. 6C, after confirming the curing of the third caulking material 18, the construction of the first caulking material 16 is carried out. Here, the first caulking material 16 is provided with an elastic resin so as to cover the outer edge of the fastening portion 14, the upper surface of the anchor bolt 10, and the upper surface of the nut 13 so as not to entrain air bubbles. When the thickness of the first caulking material 16 is increased, the inclination of the outer edge portion of the first caulking material 16 is increased according to the viscosity of the first caulking material 16. As a result, the adhesive anchor 3B according to the third embodiment described above can be obtained.

Next, as shown in FIG. 6D, after confirming the curing of the first caulking material 16, the second caulking material 17 is applied so as to cover the first caulking material 16. Here, the second caulking material 17 is constructed so as to have a predetermined thickness and to prevent pinholes from being formed inside. As a result, the adhesive anchor 3A according to the third embodiment described above can be obtained.

In the examples shown in FIGS. 6A to 6D, the method of constructing the caulking material for obtaining the adhesive anchor 3A according to the third embodiment described above has been described, but when the adhesive anchor 3B is obtained, the fifth is used. Step ST15 may be omitted. Further, when the adhesive anchor 3C is obtained, the fourth step ST14 and the fifth step ST15 may be omitted. Further, when obtaining the adhesive anchor 1A according to the first embodiment described above, only the fourth step ST14 may be carried out. Further, when the adhesive anchor 2A according to the second embodiment is obtained, only the fourth step ST14 and the fifth step ST15 need to be carried out.

As described above, according to the above embodiment, the first caulking material 16, the second caulking material 17, and the third caulking material 18 are applied to the existing adhesive anchor or the new adhesive anchor, so that the adhesive resin 15 is applied. It is possible to prevent the intrusion of water into the water. As a result, hydrolysis of the adhesive resin 15 can be prevented, so that it is possible to prevent a decrease in the adhesive strength of the existing adhesive anchor or the new adhesive anchor.

Hereinafter, the present invention will be described in more detail based on Examples and Comparative Examples performed to clarify the effects of the present invention. The present invention is not limited to the following examples and comparative examples.

The present inventors prepared the adhesive anchors according to the third embodiment from the above-mentioned first embodiment, and investigated the adhesive strength after the water vapor exposure test using the prepared adhesive anchors. Hereinafter, the contents investigated by the present inventors will be described.

(Water vapor exposure test)
The adhesive anchor was exposed to saturated water vapor at a temperature of 158 ° C. and a pressure of about 5.8 times the atmospheric pressure in a stationary autoclave for 7 days. After exposure to water vapor, the method of measuring the adhesion strength is based on "II. Adhesive anchor set test method (draft) / explanation" of "Post-construction anchor standard test method / explanation" established by the Japan Post-Construction Association. The bolt pull-out strength was measured to evaluate the adhesive strength of the adhesive anchor. The evaluation criteria are shown below.
⊚: Adhesive strength is 15 N / mm ² or more ○: Adhesive strength is 10 N / mm ² or more and 15 N / mm ² or less ×: Adhesive strength is less than 10 N / mm ²

(Example 1)
An adhesive capsule type anchor (trade name: Hilty HV, manufactured by Nippon Hilty Co., Ltd.) made of a vinyl urethane resin having a hydrolyzable ester bond and a urethane bond is used as an adhesive anchor in the anchor insertion hole of the cylindrical concrete block. Then, a stainless steel bolt was embedded to prepare a test piece. FIG. 7 is a schematic cross-sectional view of the adhesive anchor according to the embodiment of the present invention. As shown in FIG. 7, as the adhesive anchor 1A used in Examples and Comparative Examples, a stainless steel container 30 having a depth of 150 mm and a width of W5 of 280 mm was filled with concrete 11 and prepared. Further, the exposed width W4 of the concrete was 20 mm, the predetermined widths W2 and W3 were 20 mm each, and the thickness T1 was 12 mm. Others are the same as those of the adhesive anchors of the first to third embodiments described above, and thus the description thereof will be omitted.

Next, as the caulking material composition, an epoxy resin (trade name: EP-90, manufactured by Cemedine Co., Ltd., 25% strain tensile stress 4 MPa) was applied to the adhesive anchor in the same manner as in the first embodiment described above. Next, after conducting a water vapor exposure test on the produced adhesive anchor, the adhesive strength of the adhesive anchor was measured and evaluated. The results are shown in Table 1 below.

(Example 2)
Example 1 except that a fluorine-based heat-resistant resin (trade name: Eightseal (registered trademark) F-101H, 25% strain tensile stress 0.5 MPa, manufactured by Taihei Kasei Co., Ltd.) was further used as the caulking composition. An adhesive anchor structure was prepared and evaluated in the same manner as in the above. The results are shown in Table 1 below.

(Example 3)
As the caulking composition, the same as in Example 2 except that a low-viscosity epoxy resin (trade name: Bond E2420 (viscosity 1 Pa · s), 25% strain tensile stress 1 MPa, manufactured by Konishi Co., Ltd.) was used. An adhesive anchor structure was prepared and evaluated. The results are shown in Table 1 below.

(Example 4)
The same as in Example 1 except that a low-viscosity epoxy resin (trade name: Bond E2420 (viscosity 1 Pa · s), 25% strain tensile stress 1 MPa, manufactured by Konishi Co., Ltd.) was further used as the caulking composition. An adhesive anchor structure was prepared and evaluated. The results are shown in Table 1 below.

(Example 5)
An adhesive anchor structure was prepared and evaluated in the same manner as in Example 4 except that an epoxy resin (trade name: EP-90, manufactured by Cemedine Co., Ltd.) was not applied as the caulking composition. The results are shown in Table 1 below.

(Reference example 1)
The bolt pull-out strength was measured and evaluated without performing a steam exposure test using the test piece. The results are shown in Table 1 below.

(Comparative Example 1)
After performing a steam exposure test using the test piece, the bolt pull-out strength was measured and evaluated. The results are shown in Table 1 below.

Each component in Table 1 above is as follows.
-Epoxy resin A: Epoxy resin (trade name: EP-90, manufactured by Cemedine Co., Ltd.)
-Epoxy resin B: Low-viscosity epoxy resin (trade name: Bond E2420 (viscosity 1 Pa · s), manufactured by Konishi Co., Ltd.)
-Heat-resistant resin: Fluororubber-based heat-resistant resin (trade name: Eight Seal (registered trademark) F-101H, manufactured by Taihei Kasei Co., Ltd.)
In Table 1, 〇 of the epoxy resin A, the epoxy resin B and the heat-resistant resin indicates that the epoxy resin A, the epoxy resin B and the heat-resistant resin were used, and − indicates the epoxy resin A, the epoxy resin B and the heat-resistant resin. Indicates that heat resistant resin is not used.
Further, in Table 1, ◯ of the water vapor exposure test indicates that the water vapor exposure test was carried out, and × indicates that the water vapor exposure test was not carried out.

As can be seen from Table 1, by constructing the caulking material using the caulking material composition according to the above embodiment, it is possible to significantly reduce the decrease in the adhesive strength of the adhesive anchor after the steam exposure test (implementation). Examples 1 to 5). On the other hand, when the caulking material is not applied, it can be seen that the bolt pull-out strength significantly decreases before and after the steam exposure test (see Reference Example 1 and Comparative Example 1). Further, among the coking material compositions according to the above-described embodiment, the epoxy resin is preferable (Example 1), the combined use of the epoxy resin and the heat-resistant resin is more preferable (Example 2), and the epoxy resin is low. It can be seen that the combined use of the viscous epoxy resin and the heat-resistant resin is more preferable (Example 3).

1A, 1B, 2A, 2B, 3A, 3B, 3C, 100 Adhesive anchor 10,103 Anchor bolt 11 Concrete 11a, 101a Wall surface 12,102 Anchor insertion hole 13,106 Nut 14,105 Fastening part 14a Top surface 14b Edge edge 15 , 104 Adhesive resin 16,161,162 1st caulking material 17,171,172 2nd caulking material 18 3rd caulking material S1, S2, S3, S4 Gap

Claims (11)

A caulking material composition for sealing an adhesive resin of an adhesive anchor that attaches and fixes the anchor bolt to the anchor insertion hole after inserting the anchor bolt into the anchor insertion hole.
It is characterized by containing an elastic epoxy resin having a viscosity of 200 Pa · s or more and 2000 Pa · s or less immediately after mixing an epoxy resin as a main agent and a curing agent, and an elastic resin composed of a fluorine-based heat-resistant resin. Coking material composition. A caulking material composition for sealing an adhesive resin of an adhesive anchor that attaches and fixes the anchor bolt to the anchor insertion hole after inserting the anchor bolt into the anchor insertion hole.
The viscosity immediately after mixing the epoxy resin as the main agent and the curing agent is 200 Pa · s or more and 2000 Pa · s or less, and the viscosity immediately after mixing the epoxy resin as the main agent and the curing agent is 50 Pa. A coking material composition, which comprises an elastic resin composed of a low-viscosity epoxy resin having a viscosity of s or less. The caulking material composition according to claim 2, wherein the elastic resin further contains a fluorine-based heat-resistant resin. The caulking material composition according to any one of claims 1 to 3, wherein the elastic resin has a 25% strain tensile stress after curing of 0.1 MPa or more and 30 MPa or less. A caulking material, which is obtained by curing the caulking material composition according to any one of claims 1 to 4. It is characterized by comprising an adhesive anchor main body and a first caulking material obtained by curing the caulking composition according to any one of claims 1 to 4, which is applied to the adhesive anchor main body. Adhesive anchor. An adhesive anchor main body, a first caulking material obtained by curing the caulking composition according to any one of claims 1 to 4 applied to the adhesive anchor main body, and the adhesive anchor main body. An adhesive anchor comprising a third caulking material to which a caulking material composition containing at least one selected from the group consisting of low-viscosity epoxy resins is applied. The adhesive anchor according to claim 7, further comprising a second caulking material obtained by curing a caulking material composition containing a heat-resistant resin, which is applied on the first caulking material. A method for constructing a caulking material, which comprises a step of applying the caulking material composition according to any one of claims 1 to 4 to an adhesive anchor body as a first caulking material. The first step of applying a caulking material composition containing at least one selected from the group consisting of low-viscosity epoxy resins to the adhesive anchor body as the third caulking material, and
After the first step, a second step of applying the caulking material composition according to any one of claims 1 to 4 to the adhesive anchor body as a first caulking material is included. Construction method of caulking material. The method for constructing a caulking material according to claim 10, further comprising a third step of constructing a second caulking material obtained by curing a caulking material composition containing a heat-resistant resin on the first caulking material.

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