JP2827903B2 - Control method of film thickness applied to concrete substrate - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for managing a thickness of a concrete foundation, which enables measurement of the thickness of the foundation when a paint finishing material such as rubber asphalt is applied to a concrete foundation. .

[0002]

2. Description of the Related Art When a waterproof coating material such as rubber asphalt is applied to a concrete base for finishing, it is important to control the thickness of the applied film. In other words, if the film thickness is too thin, sufficient waterproofness at this site cannot be obtained,
If the film thickness is partially increased, the material is wasted and uneconomical. In particular, sagging or the like occurs on the vertical wall, which causes a reduction in finish.

Conventionally, therefore, the thickness of the waterproof material is estimated based on the amount of the waterproof material used per unit area, or a sheet of nonwoven fabric or the like is arranged to secure the thickness and prevent sagging. It has been practiced to obtain a finished surface in a state in which it is impregnated.

[0004]

However, the estimation method based on the amount of the used waterproofing material cannot always correspond to the actual film thickness, and cannot evaluate a partial thickness difference.

In addition, when the thickness of the sheet is used, it takes time to attach the sheet, and the thickness of the film becomes uneven at the joint portion of the sheet.

Incidentally, there is a film thickness gauge as a method of measuring the film thickness. This film thickness system measures the film thickness in a non-destructive manner by contacting a contact with the coating film surface, but this film thickness is measured using electromagnetic induction or high-frequency eddy current. For this reason, measurement cannot be performed unless the base of the coating film is a magnetic or non-magnetic metal, and as described above, it cannot be applied when the base is concrete.

The present invention has been made in view of the above problems, and an object of the present invention is to make it possible to measure the applied film thickness on a concrete substrate using the seed film thickness meter at a non-destructive and arbitrary position. It is intended to provide a method for controlling the thickness of the applied film on the concrete foundation.

[0008]

To achieve the above object, the present invention relates to a finishing method for applying a coating material on a surface of a concrete base, and a method of coating a metal or metal containing the metal on the surface of the concrete base in advance. Is sprayed or applied, and then the coating is performed while non-destructively measuring the film thickness of the film finishing material using a film thickness gauge.

[0009]

According to the above arrangement, the thickness of the coating material can be measured using a film thickness gauge with the metal surface covering the concrete base surface as a measurement reference plane.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to the drawings.

FIGS. 1 (a) to 1 (d) show a procedure for applying a paint film finishing material to a concrete wall according to the present invention. First, a metal coating layer 2 is applied to the surface of the concrete wall 1 as shown in (b) by applying a metal spray or a base paint containing a metal material to the surface of the concrete wall in the construction ready state shown in (a). Is formed.

In the case of metal spraying, for example, zinc,
A thermal spray coating can be formed on the surface of the concrete wall 1 by spraying a thermal spray material such as a low melting point alloy made of lead, aluminum, tin, or the like, copper, stainless steel, or the like using a metal spraying apparatus.

In the case of coating, a rust-preventive paint containing a large amount of zinc metal powder and stainless steel powder can be generally used. ER, R (manufactured by Robal) having an amount of 96% can be listed. In the latter case, a stainless steel coat (manufactured by Takein International Corporation) can be used, and a paint containing iron powder or the like can be used. As a coating method, both brush coating and spray coating can be adopted.

Next, as shown in (c), a finish is applied to the surface of the metal coating layer 2 and the finish layer 3 is coated.
To form The material constituting the finishing material layer 3 is a waterproof coating material such as rubber asphalt, and generally, the thickness of the coating film is desirably 3 to 5 mm from the viewpoint of waterproofness and economy.

After the finishing material layer 3 is dried and solidified, the thickness of the finishing material layer 3 is inspected at an arbitrary position by the film thickness meter 4, as shown in FIG.

The film thickness meter 4 comprises a contact 4a having a built-in electromagnetic induction or high frequency induction coil and a measuring instrument main body 4b connected thereto.
When is a magnetic metal, an electromagnetic induction type is used,
When the metal coating layer 2 is a non-magnetic metal, a high-frequency eddy current film thickness meter is used.

In any method, the ammeter 4c provided on the measuring instrument main body 4b according to the distance d between the tip of the contact 4a and the metal coating layer 2 depending on the thickness of the finishing material layer 3.
The thickness of the finishing material layer 3 can be measured by converting this into a thickness and reading it.

As a result of the above inspection, if the thickness is below the lower limit of the above-mentioned desirable coating thickness, the coating operation and the measuring operation of the part are repeated until the thickness falls within the above-mentioned range. Thereby, a desirable waterproof effect can be obtained, and waste of the finishing material can be eliminated.

[0019]

As described in detail in the above embodiments, in the method for controlling the thickness of a film applied to a concrete substrate according to the present invention, a film is provided at a non-destructive and arbitrary position using a film thickness meter. Since the thickness can be measured, a desired waterproof effect can be obtained with a minimum amount of the finishing material by repeating the heavy coating operation and the measuring operation, and there is an effect that the waste of the finishing material can be reduced.

[Brief description of the drawings]

1 (a) to 1 (d) are cross-sectional views for explaining a procedure for applying a coating film finishing material to a concrete wall according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Concrete wall 2 Metal coating layer 3 Finishing material layer 4 Film thickness meter 4a Contact 4b Measuring instrument main body 4c Ammeter

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Ichifusa Mitani 4-640 Shimoseito, Kiyose-shi, Tokyo Inside the Obayashi Corporation Technical Research Institute (72) Inventor Kiyoshige Nishibayashi 4-640 Shimoseito, Kiyose-shi, Tokyo Obayashi Corporation Technical Research Institute (56) References JP-A-4-147004 (JP, A) JP-A-61-38503 (JP, A) JP-A-3-189503 (JP, A) JP-A-56-143421 (JP) , U) (58) Fields surveyed (Int. Cl. ⁶ , DB name) E04B 1/66 E02D 31/02

Claims (1)

(57) [Claims] In a finishing method for applying a coating material on a surface of a concrete substrate, a metal or a paint containing a metal is sprayed or applied on the surface of the concrete substrate in advance, and then the film thickness of the coating material is reduced. A method for controlling a film thickness applied to a concrete substrate, wherein the method is performed while measuring non-destructively using a film thickness meter.