JP6236689B2 - Pneumatic permeability measurement device - Google Patents

Description

The present invention relates to a pneumatic permeation performance measuring apparatus and a measuring method for evaluating the functionality of a high-performance pavement having an air gap inside having both a water permeation function and a noise reduction function.

Conventionally, in-situ permeability testing machines have been used to evaluate the permeability of highly functional pavements.

The on-site permeability tester that has been used for the evaluation of functionality is a method that evaluates the amount of water that permeates in a 15-cm-diameter circular pavement surface for 15 seconds. This is a measurement method in which the difference hardly appears.

Also, since it is necessary to install a waterproofing material such as clay or putty as a sealing material at each location on the pavement surface to be measured, it takes time and labor to set the measuring device, and targets a wide pavement surface Not suitable for.

In addition, since a waterproof material such as clay or putty is used as the sealing material, the water-permeable area may be reduced if the amount of the waterproof material used is large, and the water-permeable area may be increased if the amount of the waterproof material is small. For this reason, the water permeability of the paved surface depends on the amount of the waterproof material. The amount of the waterproof material used varies depending on individual differences and the measurement environment, which causes variations in measurement results.

In addition, since clay or putty is used for the waterproofing material as the sealing material, there is a problem that even if it is removed, the clay or putty may remain on the pavement surface after measurement, which may deteriorate the water permeability of the pavement surface. .

In addition, since the on-site permeability test uses water, it is not possible to measure the pavement surface immediately after cleaning in a cleaning operation using water.

Japanese Patent No. 3250070 Japanese Patent Application No. 3-43585 JP 2002-174588 A

In the water permeability test apparatus and the manufacturing method described in Patent Document 1, since a putty obtained by drying and solidifying a waterproof material as a sealing material is used, it seems that clay and putty of an on-site water permeability tester remain on the pavement surface. It is possible to adjust the stability and the water permeability test time when the test apparatus is installed by making it possible to adjust the embedment amount of the waterproof material without any problems.

However, since the water permeation test apparatus of Patent Document 1 is a method that evaluates by the water permeation amount as in the conventional method, it is a measurement method that is greatly affected by the viscous friction of water and that hardly shows a difference in functional evaluation. Moreover, since water is used in the same manner as in the conventional method, measurement immediately after cleaning in a cleaning operation using water cannot be performed.

Next, it is questionable how flexible the putty that has been dried and solidified will be, especially if the waterproofing performance of the pavement surface of high-performance pavement is not sufficient, the measurement results will vary. There is a possibility of connection.

Moreover, in the air permeability evaluation apparatus and method of a pavement surface described in Patent Literature 2, the gas is used, and the pressure and flow rate of the pumped gas are detected to evaluate the air permeability such as the air permeability coefficient. Is. An O-ring and grease are used for the seal part. Therefore, it is necessary to prepare gas, and grease remains on the pavement surface after measurement. It is also difficult to measure again at the same location.

Moreover, in the test method and test apparatus of the water-permeable pavement described in Patent Document 3, air is used. However, due to the structure of the apparatus, the influence of friction due to load fluctuation due to the weight of the piston and the like is large, There is a problem with reproducibility.

The present invention has been made in view of the above points, and its purpose is to solve the conventional problems described above, by sending air to the pavement surface, and measuring the pressure and air flow rate. An object of the present invention is to provide a pneumatic permeation performance measuring apparatus that can evaluate functionality and, as a result, judge noise reduction performance.

Pneumatic permeability measurement device, which consists of a blower, a relief valve, a flow meter, a pressure gauge, and a pneumatic tester. The pneumatic permeable performance measuring device is moved close to the measurement location by the carriage, and the pneumatic tester packing is lowered and installed so as to be in contact with the pavement surface where the measurement is performed. A pneumatic permeation performance measuring apparatus for measuring the water permeation performance of a pavement surface by feeding air into the pavement by the blower and recording the air pressure and air flow rate at that time. Is

Pneumatic water permeability measuring device of the present invention, the mobile can be placed all the equipment of the device to the base vehicle, it is easy to move to the measurement point, after down only pneumatic tester on pavement It can be measured by a simple operation of sending air. 1 field 1 in actual field test
Since measurement can be performed in minutes, it is possible to easily measure the functionality of high-performance pavement in a short time at many measurement points on a wide paved road.

The packing uses polyurethane foam with no skin absorption and can be measured even on wet pavement surfaces immediately after cleaning using water.

This polyurethane foam with skin has both airtightness and flexibility, is excellent in sealing performance against unevenness of the paved surface, and is a material that is not easily affected by individual differences or measurement environment. The deformation amount of the polyurethane foam with a skin is 49% of the original height when the pneumatic tester is installed on the surface plate, and 59% when 3 kPa of air is fed. Further, even when this 3 kPa air is fed, the flow rate is 0 liter / min, so it can be said that it is excellent in confidentiality and flexibility.

Moreover, even if compared with the method using clay etc., there is no deposit on the pavement surface after measurement, and the labor of cleaning work is unnecessary.

In the conventional measurement method, water, clay, etc. are consumed for each measurement location, so it was necessary to prepare water, clay, etc. for the measurement location. However, since this measurement device uses air, 100 V power is supplied. Only.

The pressure of the air sent into the pavement is a low pressure of 1 to 3 kPa that can be supplied by a blower of about 500 W, and supply equipment such as gas is unnecessary.

By sending air into the pavement, evaluate the ease of passage of air gaps related to water permeability and the ease of escape of air sandwiched between tire grooves and pavement surfaces related to noise reduction performance by pressure and air flow rate. Is possible.

1 is a front layout view of a pneumatic water permeability measurement device according to the present invention. It is a back surface arrangement | positioning figure of the pneumatic-type water-permeable performance measuring apparatus which concerns on this invention. 1 is a pneumatic tester for a pneumatic permeability measuring device according to the present invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is an overall layout view of a pneumatic water permeability measuring device according to the present invention. In Figure 1, a pneumatic water permeability measuring device of the present invention, the blower 1, the relief valve 2, the flow meter 3, a pressure gauge (manometer) 4, is composed in the order of pneumatic tester 5, each device in the hose It is relayed, is placed all over the carriage 7 and is mobile.

FIG. 3 shows a pneumatic tester 5 of the pneumatic water permeability measurement device according to the present invention. In FIG.
The pneumatic tester 5 has both airtightness and flexibility, and the packing 6 using a polyurethane foam with a skin that does not absorb water always ensures a stable sealing performance.

In the measurement work, the pneumatic permeation performance measuring device is moved near the measurement location, the pneumatic tester 5 is lowered and installed on the pavement surface of the measurement point, and the blower 1 is turned on. The air pressurized by the blower 1 is guided to a hose and sent from the pneumatic tester 5 into the pavement at the measurement location via the relief valve 2, the flow meter 3 and the pressure gauge 4. The number of revolutions of blower 1 and relief valve 2 is 1.5
The measurement operation is completed by adjusting the pressure in the range of kPa to 2.5 kPa and recording the pressure and the air flow rate.

Although the embodiment of the present invention has been described above, the scope of the present invention is not limited to this, and it goes without saying that various modifications can be made without departing from the scope of the present invention.

Further, the present invention is not limited to the best mode for carrying out the invention described above, and it is needless to say that various other configurations can be taken without departing from the gist of the present invention.

1 Blower 2 Relief Valve 3 Flowmeter 4 Pressure Gauge (Manometer)
5 Pneumatic tester 6 Packing 7 Dolly

Claims (1)

Pneumatic permeability measurement device, which consists of a blower, a relief valve, a flow meter, a pressure gauge, and a pneumatic tester. The pneumatic permeable performance measuring device is moved close to the measurement location by the carriage, and the pneumatic tester packing is lowered and installed so as to be in contact with the pavement surface where the measurement is performed. A pneumatic permeation performance measuring apparatus for measuring the water permeation performance of a pavement surface by feeding air into the pavement by the blower and recording the air pressure and air flow rate at that time.