JP2014206412A - Method of measuring film thickness, and method of applying coating film waterproofing material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a film thickness measurement method which allows for measuring a film thickness of a coating film waterproofing material formed on a variety of underlying materials without affecting waterproof performance thereof, and to provide a method of applying the coating film waterproofing material, which enables film thickness measurement by such the film thickness measurement method.SOLUTION: A film thickness measurement method of the present invention uses an eddy-current film thickness meter 18 to measure a film thickness of a coating film waterproofing material 16 applied on an underlying material 10. The coating film waterproofing material 16 is applied on an electroconductive primer layer 12 formed by applying an electroconductive primer on a surface of the underlying material 10, to form a waterproof layer 17, and a probe 20 of the eddy-current film thickness meter 18 is brought into contact with a surface 17a of the waterproof layer 17 to measure a distance therefrom to the electroconductive primer layer 12, thereby obtaining the thickness of the waterproof layer 17.

Description

  The present invention relates to a method for constructing a waterproof coating material on the surface of a base such as concrete, and a method for measuring a film thickness of a waterproof coating material constructed by the construction method.

  The waterproof coating method is a waterproof construction method that can form a seamless waterproof layer without a seamless waterproof layer. However, the waterproof coating is difficult to manage the thickness of the waterproof layer as compared to the waterproof sheet laid with a waterproof sheet manufactured at the factory because of the on-site application work.

  Usually, at the construction site of the waterproof coating film, the film thickness is managed by the application amount of the waterproof material and the process management using the wet gauge. Film thickness management by coating amount is a method of calculating the film thickness from the relationship between the coated area (m ^ 2) and the weight of the waterproofing material used (kg), and also includes material loss and obtains high accuracy. It ’s difficult. The process management using a wet gauge is a method of managing the film thickness by inserting a wet gauge into a waterproof layer before being cured during construction. This method is effective as a process control method, but does not guarantee the thickness of the waterproof layer after curing.

  Against this background, there is a growing demand for film thickness measurement after curing of the waterproof coating material, and some local governments have already mandated film thickness measurement by the nondestructive inspection method after curing. As a method for measuring the film thickness of the coated film after curing, a needle approach method that is a microdestructive inspection method, an electromagnetic induction method that is a nondestructive inspection method, an eddy current method (for example, see Patent Document 1), an ultrasonic method ( For example, see Patent Document 2).

  Among these, the measurement methods at the practical level that can be applied to the film thickness inspection of waterproof coatings are the needle approach method and the eddy current method. The needle entry type is a method in which a needle is pierced to the base of the waterproof layer and the film thickness is directly measured. Since the needle hole is formed in the waterproof layer, it is classified as a microdestructive inspection method. On the other hand, the eddy current method is a method in which a film thickness is measured by passing a current from a probe (deep contact) in contact with the coating surface and measuring the distance between the probe and the substrate. It can be applied to the case of a magnetic material.

JP 2001-288871 A JP 2001-74438 A

  By the way, in the case of the needle approach type, since the waterproof layer is minute, but the needle hole is vacant, there is a concern about future water leakage, and it has not yet spread widely. On the other hand, since the eddy current method is a nondestructive inspection method, it does not affect the waterproof performance, but the foundation is limited to conductive non-magnetic materials, so concrete systems etc. used in many buildings Cannot be applied to the substrate.

  The present invention has been made in consideration of the above-described conventional problems, and can measure the film thickness of a waterproof coating film formed on various bases without affecting its waterproof performance. It aims at providing the construction method of the coating-film waterproofing material which enables the measurement of the film thickness by this method and this film thickness measuring method.

  The film thickness measuring method according to the present invention is a film thickness measuring method for measuring the film thickness of a waterproof coating material applied on a base using an eddy current film thickness meter, A waterproof layer is formed by applying a conductive primer layer formed by applying a conductive primer on the surface of the base, and the probe of the eddy current film thickness meter is attached to the coating film. The film thickness of the waterproof membrane is measured by contacting the surface of the waterproof material and measuring the distance to the conductive primer layer.

  In addition, the method for constructing a waterproof coating material according to the present invention includes forming a conductive primer layer by applying a conductive primer to the surface of the base, and applying a waterproof coating material on the conductive primer layer. A waterproof layer is formed.

  According to such a method, when a waterproofing layer is constructed by applying a waterproof coating material on the base, by forming a conductive primer layer between the base and the waterproof coating material, Magnetic or non-magnetic materials, and even bases made of various materials with or without electrical conductivity, such as concrete bases, are applied to the conductive primer layer by the current from the probe of the eddy current film thickness meter. It can generate eddy currents and measure the film thickness of the waterproof film after curing by nondestructive inspection, and does not affect the waterproof performance of the waterproof layer unlike the needle approach type film thickness measurement method .

  The conductive primer may be a resin material mixed with a conductive filler.

  The conductive primer may be a resin material mixed with an ionic liquid.

  In this case, the ionic liquid can generate a primer having sufficient conductivity, including an alicyclic ionic liquid and an aliphatic ionic liquid.

  In addition, the alicyclic ionic liquid is an alicyclic amine ionic liquid, and the aliphatic ionic liquid is an aliphatic amine ionic liquid, the physical properties of the coating film are lowered. This can be prevented, more uniform application is possible, and the durability of the conductive primer layer after application can be improved.

  You may provide the reinforcing material formed with the sheet-like fiber between the said conductive primer layer and the said coating-film waterproof material. That is, after a reinforcing material formed of sheet-like fibers is attached to the surface of the conductive primer layer, the waterproofing layer is applied by applying the waterproof coating material to the surface of the reinforcing material. Good.

  Moreover, you may provide a ventilation buffer sheet between the said conductive primer layer and the said coating-film waterproof material. That is, after attaching a ventilation cushioning sheet to the surface of the conductive primer layer, the waterproofing layer may be constructed by applying the waterproof coating material on the ventilation cushioning sheet.

  According to the present invention, even if it is a concrete base, for example, an eddy current is generated in the conductive primer layer by the current from the probe of the eddy current film thickness meter, and the coating waterproofing material after curing by nondestructive inspection Can be measured.

FIG. 1 is a perspective sectional view for explaining a method of applying a waterproof coating material according to an embodiment of the present invention. FIG. 2 is a longitudinal sectional view for explaining a film thickness measuring method according to an embodiment of the present invention. FIG. 3 is a longitudinal sectional view for explaining a film thickness measuring method in the case where a ventilation cushioning sheet is used instead of the reinforcing cloth.

  Hereinafter, the film thickness measuring method according to the present invention will be described in detail with reference to a preferred embodiment in relation to the method of applying a waterproof coating material to be measured by this film thickness measuring method.

  Since the concrete base used in many buildings does not have electrical conductivity, it is difficult to measure the film thickness of the cured waterproofing film applied to the surface with an eddy current film thickness meter. It is. Therefore, the film thickness measurement method according to the present embodiment applies the conductive primer to the surface of the concrete base, and coats the waterproof film on the surface, thereby coating the waterproof film thickness. Can be measured by an eddy current film thickness meter.

  FIG. 1 is a perspective cross-sectional view for explaining a method for applying a waterproof coating material according to an embodiment of the present invention, and FIG. 2 is for explaining a film thickness measuring method according to an embodiment of the present invention. FIG.

  As shown in FIG.1 and FIG.2, the construction method of the waterproofing | water-resistant film | membrane material which concerns on this embodiment forms the conductive primer layer 12 in the surface of the base | substrate 10, and is a reinforcement cloth as needed on the surface 12a After laying 14, a waterproof layer 17 is formed by further applying a coating waterproofing material 16 thereon and curing it.

  The foundation 10 is concrete, mortar, or the like that constitutes a rooftop, veranda, floor, wall, or the like of a building. In this embodiment, the case where the concrete base 10 is used is illustrated.

  The conductive primer layer 12 is formed of a nonmagnetic material having conductivity, and a conductive primer provided with conductivity by mixing a conductive filler into a primer serving as a base material is applied to the surface of the base 10. It has been cured. Although it does not specifically limit as a primer, What is necessary is just to use well-known things, such as resin materials, such as an epoxy resin generally used as a primer, an acrylic resin, a urethane resin, or a composition containing these. Also, the conductive filler is not particularly limited, but it may be a non-magnetic material among those conventionally used for antistatic purposes in coating floor materials and adhesives, such as gold, silver, copper, etc. Conductive inorganic powder such as conductive metal powder, plating powder, conductive carbon black powder, etc., or a mixture thereof may be used. The shape of the conductive filler is arbitrary, and may be, for example, flaky, spherical (granular), or dendritic.

  For example, the conductive primer layer 12 may have a resistivity on the order of 10 ^ (-2) Ωm to 10 ^ (-8) Ωm. It is preferable that the resistivity of the conductive primer layer 12 is set to the above-mentioned condition because measurement with an eddy current film thickness meter 18 described later can be performed stably and reliably.

  The reinforcing cloth (reinforcing material) 14 is not particularly limited, but a fiber made of nylon, acrylic, glass or the like may be used. In the present embodiment, the configuration in which the reinforcing cloth 14 is interposed between the conductive primer layer 12 and the waterproof coating material 16 is illustrated, but the reinforcing cloth 14 may be omitted and will be described later. Instead of the reinforcing cloth 14, a ventilation cushioning sheet 21 can be used.

  The waterproof layer 17 is obtained by applying a waterproof coating material 16 used for waterproofing a rooftop, a veranda, a floor, a wall, or the like of a building on the base 10, and drying and curing the coating film. In addition, in the example shown in FIG. 1, since the reinforcing cloth 14 is used, what was integrated so that the waterproof membrane 16 may be impregnated with the mesh-like reinforcing cloth 14 constitutes the waterproof layer 17. . The waterproofing film 16 is not particularly limited, and a known material such as a resin system such as an acrylic resin, or various synthetic rubber systems such as a rubber asphalt system, a urethane rubber, an acrylic rubber, a chloroprene rubber or the like may be used. Good.

  As a method for applying the waterproof coating material according to this embodiment, first, a conductive primer is applied to the surface of the base 10 and dried and cured to form the conductive primer layer 12. Subsequently, the reinforcing cloth 14 is attached to the surface 12a of the conductive primer layer 12, and the waterproof coating material 16 is applied thereon and dried and cured. Then, both are integrated so that the waterproof membrane 16 is impregnated with the mesh-like reinforcing cloth 14. The coating film in which the reinforcing cloth 14 and the waterproof coating material are integrally cured forms the waterproof layer 17, whereby the installation of the waterproof coating material 16 is completed, and the waterproof work on the base 10 is performed. Complete. In the case where the reinforcing cloth 14 is omitted, the waterproof layer 17 may be formed by directly applying the waterproof coating material 16 to the surface 12 a of the conductive primer layer 12.

  Next, as a film thickness measuring method according to the present embodiment, as shown in FIG. 2, first, the probe (deep contact) 20 of the eddy current film thickness meter 18 is landed / contacted on the surface 17 a of the waterproof layer 17. Let The eddy current film thickness meter 18 may be a known one that is generally used for measuring the film thickness of a coating film.

  Subsequently, the eddy current film thickness meter 18 is operated to pass the waterproof layer 17 that is an insulating material integrally formed from the coating film waterproofing material 16 and the reinforcing cloth 14 from the probe 20 so as to pass through the conductive primer layer. By passing the current up to 12, the magnitude of the eddy current flowing on the surface 12a of the conductive primer layer 12 which is a nonmagnetic layer is measured. Thereby, the thickness t0 from the lower surface of the probe 20, that is, the surface 17a of the waterproof layer 17 to the surface 12a of the conductive primer layer 12, is detected, and this thickness t0 is directly used as the film of the waterproof layer 17 (the waterproof coating material 16). The thickness becomes t0. That is, the reinforcing cloth 14 reinforces the waterproof layer 17 and at the same time functions to secure the thickness of the waterproof layer 17.

  In the present embodiment, as described above, the ventilation cushioning sheet 21 can be used instead of the reinforcing cloth 14 (see FIG. 3). What is necessary is just to use what is generally used as the foundation | substrate of a coating-film waterproofing construction method for the ventilation | gas_flowing cushioning sheet 21, For example, an asphalt sheet, a rubber sheet, a synthetic resin foam sheet, etc. are mentioned.

  As shown in FIG. 3, as a construction method of the waterproof coating material when using the ventilation cushion sheet 21, first, a conductive primer is applied to the surface of the base 10, dried and cured, and then the conductive primer layer 12. Form. Subsequently, the air-permeable cushion sheet 21 is adhered to the surface 12a of the conductive primer layer 12 using an adhesive or the like, and the waterproof coating material 16 is applied thereon and dried and cured. Thereby, since the coating film which the coating-film waterproof material 16 hardened | cured forms the waterproof layer 17, construction of a coating-film waterproof material is completed and the construction work of the coating-film waterproofing to the base | substrate 10 is completed.

  Subsequently, as a film thickness measuring method in this case, as shown in FIG. 3, first, the probe 20 of the eddy current film thickness meter 18 is landed and brought into contact with the surface 17 a of the waterproof layer 17. Then, the eddy current film thickness meter 18 is operated to pass a current from the probe 20 to the conductive primer layer 12 through the waterproof layer 17, which is an insulating material formed of the waterproof coating material 16. The magnitude of eddy current flowing on the surface 12a of the conductive primer layer 12, which is a magnetic layer, is measured. Thereby, the thickness t1 from the lower surface of the probe 20, that is, the surface 17a of the waterproof layer 17 to the surface 12a of the conductive primer layer 12, is detected, and by subtracting the thickness t2 of the known ventilation cushion sheet 21 from this thickness t1, The film thickness t0 of the waterproof layer 17 (the waterproof coating material 16) is calculated (t0 = t1-t2).

  The conductive primer layer 12 only needs to be formed of a non-magnetic material that can flow eddy current, and may be formed of a material other than the conductive primer mixed with the conductive filler as described above.

  For example, the conductive primer layer 12 may be formed using a conductive primer obtained by mixing a conductive ionic liquid with a primer serving as a base material, instead of the conductive filler. An ionic liquid refers to a salt composed of only ions, especially a liquid compound, which can pass a current without adding a supporting electrolyte and exhibits a wide potential window, and is mixed into a primer made of a resin material. By doing so, the resin itself can be made conductive.

  As the conductive primer, alicyclic ionic liquid and aliphatic ionic liquid are preferable among ionic liquids. Ionic liquids include amine-based, pyridine-based, halogen-based, boron-based, phosphorus-based, etc., but especially amine-based liquids (alicyclic amine-based ionic liquids, aliphatic amine-based ionic liquids) For example, since it is difficult to lower the physical properties (for example, product strength and durability) of a primer made of an epoxy resin or the like, it can be suitably used in this embodiment. Therefore, in this embodiment, a mixture of an alicyclic ionic liquid and an aliphatic ionic liquid is used as the amine-based ionic liquid, and a composition in which these are mixed in the primer serving as a base material is conductive. It was used as a primer.

  The alicyclic amine-based ionic liquid is not particularly limited. For example, N-methyl-N-propylpiperidinium bromide, N-methyl-N-propylpiperidinium chloride, N-methyl-N-propylpi Peridinium tetrafluoroborate, N-methyl-N-propylpiperidinium hexafluorophosphate, N-methyl-N-propylpiperidinium bis (trifluoromethanesulfonyl) imide, N-methyl-N-propylpyrrolidinium bromide, N-methyl-N-propylpyrrolidinium chloride, N-methyl-N-propylpyrrolidinium tetrafluoroborate, N-methyl-N-propylpyrrolidinium hexafluorophosphate, N-methyl-N-propylpyrrolidinium bis (Trifluoromethanes Phonyl) imide, N-methyl-N-butylpyrrolidinium bromide, N-methyl-N-butylpyrrolidinium chloride, N-methyl-N-butylpyrrolidinium tetrafluoroborate, N-methyl-N-butylpyrrolidi Examples thereof include nium hexafluorophosphate, N-methyl-N-butylpyrrolidinium bis (trifluoromethanesulfonyl) imide, and a mixture of these alicyclic amines.

  The aliphatic amine-based ionic liquid is not particularly limited. For example, N, N, N-trimethyl-N-propylammonium bromide, N, N, N-trimethyl-N-propylammonium chloride, N, N, N- Trimethyl-N-propylammonium tetrafluoroborate, N, N, N-trimethyl-N-propylammonium hexafluorophosphate, N, N, N-trimethyl-N-propylammonium bis (trifluoromethanesulfonyl) imide, hexyltrimethylbisamide, etc. And a mixture of aliphatic amines.

  In general, an aliphatic ionic liquid is used as a concept including an alicyclic ionic liquid, but in the present invention, an aliphatic ionic liquid and an alicyclic ionic liquid mixed together are used. In order to distinguish, an aliphatic ionic liquid does not contain an alicyclic ionic liquid, but shows a chain-like aliphatic ionic liquid.

  In the conductive primer (conductive primer layer 12), an alicyclic ionic liquid (for example, an alicyclic amine-based ionic liquid) and an aliphatic ionic liquid (for example, an aliphatic amine-based ionic liquid) The total content of the mixture is preferably 3% by mass to 10% by mass, and more preferably 5% by mass with respect to a primer such as an epoxy resin as a base material. By setting it as this compounding quantity, while having high durability and product quality, the conductive primer which has sufficient electroconductivity can be produced | generated. If the total blending amount of the ionic liquid is lower than 3% by mass, the electrical conductivity may be too low. If the total blending amount of the ionic liquid is higher than 10% by mass, the physical properties of the coating will be lowered and the durability will be reduced. May cause problems.

  As a mixing ratio of the alicyclic ionic liquid and the aliphatic ionic liquid, the weight ratio (alicyclic ionic liquid: aliphatic ionic liquid. For example, alicyclic amine ionic liquid. : Aliphatic amine ionic liquid) is about 30:70 to 90:10, preferably 45:55, the influence on the coating properties and conductivity of the conductive primer can be reduced. When the weight ratio of the alicyclic ionic liquid to the aliphatic ionic liquid is lower than 30:70 (for example, 20:70), the strength of the coating film may be decreased, and the conductivity may be decreased. If it is higher than 90:10 (for example, 95: 5), sufficient conductivity may not be obtained.

  Such a conductive primer has a known primer as a base material, and a mixture of an alicyclic ionic liquid and an aliphatic ionic liquid may be blended therein. For example, a cyclic amine ionic liquid and An ionic liquid obtained by mixing an aliphatic amine-based ionic liquid may be mixed so as to be uniform with respect to a primer serving as a base material.

  What is necessary is just to carry out similarly to what mixed the above-mentioned conductive filler as a coating method to a conductive primer.

  As described above, the film thickness measuring method according to the present embodiment is a method of measuring the film thickness of the waterproof coating material 16 applied on the base 10 using the eddy current film thickness meter 18, The waterproof coating 16 is formed by applying a waterproof layer 17 on a conductive primer layer 12 formed by applying a conductive primer to the surface of the base 10, and has an eddy current film thickness. By measuring the distance to the conductive primer layer 12 by bringing a total of 18 probes 20 into contact with the surface 17a of the waterproof membrane 16 (waterproof layer 17), the film thickness of the waterproof layer 17 (waterproof membrane 16). Measure.

  Further, the method for applying the waterproof coating material according to this embodiment forms a conductive primer layer 12 by applying a conductive primer to the surface of the base 10, and the waterproof coating material 16 on the conductive primer layer 12. Is applied to form the waterproof layer 17.

  As described above, according to the present embodiment, when the waterproof coating 17 is applied on the base 10 and the waterproof layer 17 is applied, the conductive primer layer is provided between the base 10 and the waterproof waterproof 16. 12 is formed. Accordingly, the base 10 made of various materials, for example, a concrete base 10, regardless of whether it is magnetic or non-magnetic, or conductive, can be obtained from the probe 20 of the eddy current film thickness meter 18. An eddy current is generated in the conductive primer layer 12 by the current of the current, and the film thickness of the waterproof layer 17 (coating waterproofing material 16) after curing can be measured by nondestructive inspection. Thus, the waterproof performance of the waterproof layer 17 is not affected.

  In this case, the conductive primer may be a resin material mixed with a conductive filler, or a resin material mixed with an ionic liquid.

  When a conductive primer is produced by mixing an ionic liquid, a primer with sufficient conductivity can be obtained by blending an alicyclic ionic liquid and an aliphatic ionic liquid as the ionic liquid. Can be generated. Here, using an alicyclic amine ionic liquid as the alicyclic ionic liquid and using an aliphatic amine ionic liquid as the aliphatic ionic liquid prevents the physical properties of the coating from being deteriorated. Thus, more uniform application is possible, and the durability of the conductive primer layer 12 after application can be improved.

DESCRIPTION OF SYMBOLS 10 Ground 12 Conductive primer layer 14 Reinforcement cloth 16 Waterproof layer 18 Eddy current film thickness meter 20 Probe

Claims (12)

It is a film thickness measuring method for measuring the film thickness of a waterproof coating material applied on the base using an eddy current film thickness meter,
The coating waterproof material is a waterproof layer formed by applying on a conductive primer layer formed by applying a conductive primer on the surface of the base,
The film thickness of the waterproof coating material is measured by bringing the probe of the eddy current film thickness meter into contact with the surface of the waterproof coating material and measuring the distance to the conductive primer layer. To measure the film thickness. In the film thickness measuring method according to claim 1,
The film thickness measuring method, wherein the conductive primer is a resin material mixed with a conductive filler. In the film thickness measuring method according to claim 1,
The method for measuring a film thickness, wherein the conductive primer is a resin material mixed with an ionic liquid. In the film thickness measuring method according to claim 3,
The ionic liquid includes an alicyclic ionic liquid and an aliphatic ionic liquid. In the film thickness measuring method according to claim 4,
The alicyclic ionic liquid is an alicyclic amine ionic liquid,
The method for measuring film thickness, wherein the aliphatic ionic liquid is an aliphatic amine ionic liquid. In the film thickness measuring method according to any one of claims 1 to 5,
A film thickness measuring method, comprising: a reinforcing material formed of sheet-like fibers between the conductive primer layer and the waterproof coating material. In the film thickness measuring method according to any one of claims 1 to 5,
A method for measuring a film thickness, wherein a ventilation cushioning sheet is provided between the conductive primer layer and the waterproof coating material.   A coating film waterproofing material characterized in that a conductive primer layer is formed by applying a conductive primer on a surface of a base, and a waterproofing layer is formed by coating a waterproof coating material on the conductive primer layer. Construction method. In the construction method of the waterproof coating material according to claim 8,
The method for applying a waterproof coating material, wherein the conductive primer is a resin material mixed with a conductive filler. In the construction method of the waterproof coating material according to claim 8,
The method for applying a waterproof coating material, wherein the conductive primer is a resin material mixed with an ionic liquid. In the construction method of the waterproofing membrane film according to any one of claims 8 to 10,
After applying a reinforcing material formed of sheet-like fibers on the surface of the conductive primer layer, the waterproofing layer is applied by applying the waterproof coating material on the surface of the reinforcing material. Construction method of waterproof membrane. In the film thickness measuring method according to any one of claims 8 to 10,
A method for constructing a waterproof coating material, comprising: affixing an air-permeable cushion sheet on the surface of the conductive primer layer; and applying a waterproof layer by applying the waterproof membrane on the breathable cushion sheet. .

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