JPH0627010A - Method for determining deterioration of waterproof sheet through hardness meter - Google Patents

Abstract

PURPOSE:To allow nondestructive measurement with high reproducibility conveniently at site in a short time by measuring hardness of a waterproof sheet material through a Barcol hardness meter and correcting the measured hardness based on the surface temperature of the waterproof material measured through a surface thermometer. CONSTITUTION:Current hardness of a waterproof sheet material 1 is measured through a Barcol hardness meter 2. The hardness meter 2 indicates the hardness of unkown sample as a relative value in the range of 1-100 with respect to hardness 100 of reference glass plate. Two contact parts 6 arranged in the rear of the hardness meter are brought into contact with the surface of the waterproof material 1 and then an operator presses an insertion needle part 5 against the waterproof material 1 and inserts the needle into the waterproof material 1. Barcol hardness is measured when the insertion needle part 5 penetrates through the waterproof material 1. Since the Barcol hardness of the waterproof material 1 is susceptible to temperature variation, temperature dependency of the waterproof material 1 is confirmed and then the measured Barcol hardness is corrected based on the temperature measured through a surface thermometer.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for determining deterioration of a sheet waterproofing material used in a sheet waterproofing method in an exposed waterproof layer of a building such as a detached house, a school building or a general building.

[0002]

2. Description of the Related Art A sheet waterproofing method is a method for forming a waterproof layer by adhering or welding a sheet waterproofing material such as vulcanized rubber, non-vulcanized rubber or polyvinyl chloride with an adhesive or hot air. . This method has excellent properties such as followability to the movement of the base and chemical resistance, and has an advantage in terms of construction that the asphalt thermal method does not have. For this reason, as one of the new waterproofing methods, it has become popular especially as exposed waterproofing.

However, these waterproof materials gradually deteriorate as they age, under the influence of external external forces such as ultraviolet rays, heat, ozone, rainwater, humidity and repeated fatigue. Eventually, it will be time to repair and refit. In order to accurately judge the time, it is necessary to constantly check the degree of deterioration of the waterproof sheet in each building.
The elongation at break in the tensile test is generally used as an item for evaluating the degree of deterioration of the waterproof sheet. The tensile test is a complete destructive test and is not suitable as a method for diagnosing the deterioration of waterproof sheets attached to the site. Therefore, instead of the tensile test, there is a need for a deterioration evaluation method that is as simple and nondestructive as possible. The application range of the method for determining deterioration of a sheet waterproof material according to the present invention by a hardness meter is general sheet waterproof material, and an example of a vinyl chloride resin waterproof sheet is described as an example of the sheet waterproof material. ing.

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a simple method for diagnosing deterioration satisfying the following conditions. First, it should be a method that can be carried out on site, is simple, and takes a short time. Second, it can be easily repaired even if it is not destroyed or destroyed. Third
In addition, show a good correlation with tensile properties such as elongation at break. Fourth, high reproducibility. Fifth, it can be applied to all materials used as a waterproof sheet. 5 points.

[0005]

The problems to be solved by the present invention are as described above, and the means for solving the above problems will be described below. That is, the hardness of the sheet waterproof material 1 is measured by the Barcol hardness meter 2, the surface temperature of the sheet waterproof material 1 is further measured by the surface thermometer 3, the hardness is corrected by the temperature, and the value is compared with the Barcol hardness. The degree of deterioration of the waterproof sheet 1 is determined.

[0006]

[Operation] Next, the operation will be described. Based on another basic experiment, the degree of deterioration of the waterproof sheet 1 is used as an experimental value for each of the elongation at break, the breaking energy value, and the 100% modulus value. For example, when the elongation at break is lower than the reference elongation, it is considered that the deterioration has progressed and the waterproof sheet 1 needs to be re-covered. Therefore, the inspector obtains the barcol hardness of 20 ° C from the values measured by the surface thermometer 3 and the barcol hardness meter 2 according to the temperature dependency diagram of FIG. If the value of the elongation at break is less than the standard elongation, the replacement is recommended.

[0007]

EXAMPLES Next, examples will be described. Figure 1 shows a surface thermometer 3
Is a drawing showing a state in which the surface temperature of the sheet waterproof material 1 is measured by FIG. 2, FIG. 2 is a drawing showing a state in which the hardness of the sheet waterproof material 1 is measured by a Barcol hardness meter 2, and FIG. FIG. 4 is a drawing showing the relationship between the barcol hardness of a specific sheet and elongation at break, FIG. 4 is a drawing showing the temperature dependence of the barcol hardness of a specific sheet, and FIG. 5 is the breaking energy value of the barcol hardness of a specific sheet. And FIG. 6 is a drawing showing the relation between the Barcol hardness and the 100% modulus value in a specific sheet.

FIG. 1 shows a state in which the temperature of the waterproof sheet 1 attached to the roof of a general building or a detached house is first measured by a surface thermometer 3. That is, the surface thermometer 3 presses the temperature measuring sensor 4 against the surface of the waterproof sheet 1, and measures the temperature of the waterproof sheet 1 at the time of measurement. The reason why the Barcol hardness needs to be corrected by measuring the surface temperature in this way is that the Barcol hardness of a specific sheet changes depending on the temperature.

FIG. 2 shows a state in which the current hardness of the sheet waterproof material 1 is measured by the Barcol hardness meter 2 in order to diagnose the deterioration of the sheet waterproof material 1 in a non-destructive state. The Barcol hardness meter 2 is a side view in which the hardness of a reference glass plate is 100 and the hardness of an unknown sample is displayed as a relative value in the range of 1 to 100. The Barcol hardness tester 2 is composed of two contact legs 6 arranged at the rear part and an insertion needle part 5 at the front part. The two contact legs 6 are brought into contact with the surface of the sheet waterproof material 1, and the operator then presses the insertion needle portion 5 against the sheet waterproof material 1 to move the needle to the thickness portion of the sheet waterproof material 1. To insert into. The hardness when the insertion needle portion 5 penetrates the waterproof sheet 1 is measured as Barcol hardness. A hole is formed by the needle at the portion where the insertion needle portion 5 is fitted, but since it is an extremely small hole, it can be completely closed by simple repair.

It has been confirmed that the Barcol hardness tester 2 can obtain substantially the same correlation coefficient and regression equation even with a glass plate base, although it depends on the structure of the base of the waterproof sheet 1. Therefore, if the sheet waterproof material and the base structure are constant, a good correlation can be obtained even with various sheet waterproof materials and bases, only by changing the coefficient of the regression equation. Since the barcol hardness of a sheet waterproof material is easily affected by temperature, it is necessary to confirm the temperature dependence of the sheet waterproof material and then obtain the corrected barcol hardness by correcting the measured barcol hardness with the temperature measured by the surface thermometer. There is. FIG. 4 shows an example of the temperature dependence of a specific sheet. As shown in FIG. 4, the Barcol hardness is sensitive to temperature and linearly decreases as the temperature increases. Therefore, the Barcol hardness at 20 ° C can be determined by measuring the Barcol hardness at any temperature in the range of -10 to + 30 ° C.

Next, the elongation at break can be obtained from the drawing of the relationship value between the value converted into the Barcol hardness at a temperature of 20 ° C. and the elongation at break as in the example of FIG. If the barcol hardness is high, the elongation at break is low. The elongation at break is the ratio of the elongation at break to the distance between marked lines of 20 mm in the tensile test. Further, the breaking energy value, which is another factor, decreases as the Barcol hardness increases, as shown in the example of FIG. The breaking energy value is an integral value of tensile stress until the breaking. Conversely, the 100% modulus value increases with increasing Barcol hardness. 100% modulus value is 20mm elongation
Is the tensile stress at that time. It can be confirmed that the respective factors and the Barcol hardness have a good correlation.

Based on another basic experiment, the degree of deterioration of the waterproof sheet 1 is used as an experimental value for each of the elongation at break, the breaking energy value, and the 100% modulus value. For example, when the elongation at break is lower than the reference elongation, it is considered that the deterioration has progressed and the waterproof sheet 1 needs to be re-covered. Therefore, the inspector obtains the barcol hardness of 20 ° C. from the values measured by the surface thermometer 3 and the barcol hardness meter 2 according to the temperature dependence diagram of FIG. If the value of the elongation at break is less than the standard elongation, the replacement is recommended.

[0013]

Since the present invention is the method for diagnosing the deterioration of the waterproof sheet as described above, it has the following effects. That is, firstly, since it is a method that can be carried out on site, is simple and takes a short time, the inspector only needs to bring a small surface thermometer 3 and a Barcol hardness meter 2 and the conversion table will be used later. By converting and expressing the elongation at break, it is possible to draw a conclusion immediately.

Secondly, a hole is made in the waterproof sheet 1 at the insertion needle portion 5 of the Barcol hardness tester 2. The portion can be easily restored to a perfect state by injecting a repair material. Of. Therefore, even if it is non-destructive or it is destroyed, it can be easily repaired.

Thirdly, since it shows a good correlation with tensile property values such as elongation at break, etc., a sample is cut from the sheet waterproof material 1 and placed in a test room for elongation at break or 10
It is not necessary to obtain the 0% modulus value and the breaking energy value.

Fourthly, since the reproducibility is high, it is possible to obtain almost the same elongation at break, breaking energy value, and 100% modulus value even when measured at several places.

Fifthly, since the present invention can be applied to all the materials used as the sheet waterproof material, when the material of the sheet waterproof material 1 is different, the corresponding sheet waterproof material can be used as shown in FIGS.
Since the same deterioration diagnosis can be performed by obtaining the relationships of FIGS. 5 and 6, it is not necessary to change to another deterioration diagnosis method of the relationship between the temperature dependence of the Barcol hardness and the tensile strength property.

[Brief description of drawings]

FIG. 1 is a diagram showing a state in which a surface temperature of a waterproof sheet 1 is measured by a surface thermometer 3.

FIG. 2 is a drawing showing a state where the hardness of the sheet waterproof material 1 is measured by a Barcol hardness meter 2.

FIG. 3 is a drawing showing an example of the relationship between Barcol hardness and elongation at break in a specific sheet.

FIG. 4 is a drawing showing an example of temperature dependence of Barcol hardness in a specific sheet.

FIG. 5 is a drawing showing an example of the relationship between the Barcol hardness of a specific sheet and the breaking energy value.

FIG. 6: Barcol hardness and 10 for a particular sheet
It is drawing which shows the example of a relationship of a 0% modulus value.

[Explanation of symbols]

 1 sheet waterproof material 2 barcol hardness meter 3 surface thermometer 4 temperature measuring sensor 5 insertion needle part 6 contacting leg

Claims (1)

[Claims] 1. A sheet waterproof material 1 by means of a Barcol hardness meter 2.
The hardness of the sheet waterproof material 1 is measured by the surface thermometer 3, the hardness is corrected by the temperature, and the degree of deterioration of the sheet waterproof material 1 is determined by comparing with the Barcol hardness. A method for determining deterioration of a waterproof sheet using a hardness meter.