KR20080061279A - Constant head permeability test apparatus for porous materials - Google Patents

Abstract

A static pressure head permeability test apparatus for porous materials is provided to easily calculate a permeability coefficient in a room by performing a head permeability test with applying a specimen of porous materials as in a manufacturing mold or a collected core state. A static pressure head permeability test apparatus for porous materials includes a static pressure head supply device(100), a fixing unit(200), a permeation body(300), and a liquid vessel(400). The static pressure head supply device has an inside space divided into a water feeding part and an overflow part to maintain a static pressure head. The static pressure head supply device has a water feeding pipe connected to the water feeding part and an overflow discharge pipe connected to the overflow part. The fixing unit is provided to fix and arrange the porous materials to be tested in permeability. The fixing unit is directly connected to the water feeding part of the static pressure head supply device under the static pressure head supply device. The permeation body includes a permeation unit with an empty space directly connected to the fixing unit under the fixing unit and a permeated water discharge tube connected to the permeation unit. The liquid vessel is connected to the permeated water discharge tube of the permeation body. The static pressure head supply device is connected to be detachable from the fixing unit.

Description

Constant head permeability test apparatus for porous materials

The present invention relates to a permeation test apparatus that can determine the permeability performance of a porous material such as asphalt pavement in advance, it is possible to easily determine the permeability coefficient while maintaining the water level, as well as to obtain a permeability coefficient, as well as asphalt mixture, etc. The present invention relates to a device in which a porous material manufactured in the mold can be easily obtained even in a room in a specimen state or a collected core state in a production mold.

In recent years, pavement by porous materials (asphalt, concrete, etc.) having water permeability has been activated in order to reduce traffic accidents caused by rainwater and to obtain a noise reduction effect on roads. In particular, it is widely applied to pavements such as parks, amusement parks, parking lots, bicycle paths, trails, and plazas.

It is necessary to calculate the permeability coefficient in order to check the permeability performance of the properties of the porous material, the permeability coefficient is calculated by the following Equation 1.

Where k = permeability coefficient, Q = flow rate during the time t (cm 3), L = thickness of the specimen (cm)

A = cross-sectional area of the specimen (cm 2), t = time required for the test (seconds), Δ h : head head difference (cm)

In order to obtain the permeability coefficient according to the above equation, a certain permeability test apparatus is required. Conventional permeability test apparatus is a device that can be tested in the field of packing, the permeability test device is placed on the pavement surface, the packaging and the test device is sealed, and the water is poured into the permeability test on the variable. However, since such equipment is measured by the time passed by a certain water, it is only possible to make relative comparisons, and there is a drawback that it is impossible to obtain an accurate permeability coefficient because test values may be different depending on whether or not the surface is in close contact with the pavement. . Furthermore, since the permeability performance can be measured only at the packaging site, there is a limitation that the permeability coefficient can not be used to determine the permeability coefficient in advance or before the packaging material development to improve the properties of the mixture to a suitable level.

The present invention was developed in order to solve the problems of the prior art as described above, it is possible to easily measure the water head difference while maintaining the water level can easily obtain the permeability coefficient, as well as the specimen of the porous material made of asphalt mixture, etc. It is a technical object to provide a device that can easily obtain the permeability coefficient in the room in the manufacturing mold or the state of the collected core.

In order to solve the above technical problem, the present invention provides a device for testing the permeability of a porous material,

An internal space is divided into a water supply part and a overflow part so as to maintain a water head, and a water supply head having a water supply pipe connected to the water supply part and a monthly discharge pipe connected to the overflow part;

A fixture provided under direct communication with the water supply unit of the head of the head supply, and provided with a porous material placed and fixedly disposed to test the water permeability;

A pitcher body provided with a pitcher of an empty space leading directly to the fixture below the stator, and having a pitcher discharge pipe connected to the pitcher; And,

It comprises a; and a liquid container connected to the permeable discharge pipe of the water permeable body,

The hydrostatic head supply device provides a hydrostatic permeability test apparatus of the porous material, characterized in that the detachable coupling with the holder.

According to the present invention, the following effects are expected.

First, it is possible to measure the head head difference while maintaining the water level simply by providing the overflow wall in the hydrostatic head supply device, it is possible to easily obtain the permeability coefficient.

Second, the permeability test can be easily obtained indoors because the permeability test can be performed while applying the specimen of the porous material made of the asphalt mixture to the state in the manufacturing mold or the collected core state as it is.

Third, since the permeability of the porous material can be grasped in advance, it can be usefully used to derive the composition of the porous material to have the most suitable physical properties for the actual application situation.

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

1 to 4 is a perspective view, a front view, a side view and a plan view showing a water level permeability testing apparatus according to the present invention, Figure 5 is a fixed head 200 by rotating the water head supply apparatus 100 in the water level permeability testing apparatus of FIG. Front view of the state separated from. The present invention relates to a device for testing the permeability of a porous material, and comprises a hydrostatic head supply device 100, a fixed table 200, a water permeable body 300, a liquid container (400).

Water purification head supply device 100 is an internal space is divided into a water supply portion (A) and the overflow portion (B) so that the head is easily maintained, the water supply portion (A) is connected to the water supply pipe (A1), the overflow portion ( B) is connected to the overflow discharge pipe (B1). The division of the water supply part A and the overflow part B can be completed simply by providing the overflow wall 120 in the interior of the hydrostatic head supply device 100. When the water head supply device 100 supplies water to the water supply part A through the water supply pipe A1, the purified water supply device 100 collects in the water supply part A and collects in the overflow part B beyond the overflow wall 120. Water gathered in the flow portion (B) is a structure that is discharged through the overflow discharge pipe (B1). As a result, even if a certain amount of water is supplied to the water supply unit A, the water level may be constantly maintained at the height of the overflow wall 120 at all times.

Of course, if the water supply pipe (A2) is connected to the water supply unit (A) in the purified water supply device (100) after using the water permeability test apparatus of the present invention will be able to discharge the water collected in the water supply pipe (A1) collectively It will be further provided that the water supply control valve in the water supply unit (A) can adjust the amount of supply in the process of using the water permeability test apparatus of the present invention will help to maintain the water level of the water supply unit (A). On the other hand, supplying water to the water supply unit (A) is a method of supplying tap water by connecting the water supply pipe (A1) to the faucet, or to supply the water of the tank through the pump by connecting the water supply pipe (A1) to a separately provided water tank It can be the way. However, if a separate tank is provided, the permeation test apparatus of the present invention is expected to be advantageous because it can be used without restriction (not necessarily a place where a water supply device is provided).

Fixture 200 is a configuration provided to be in direct communication with the water supply portion (A) of the head head supply device below the head head supply device 100, the porous material to test the water permeability is provided to be fixedly placed. The fixture 200 should be a structure in which the porous material can be fixed in a horizontal position. In particular, the fixture 200 is provided to be detachably coupled with the hydrostatic head supply device 100, thereby enabling the placement or removal of the porous material to be tested on the fixture 200.

Pitcher body 300 is configured to be provided with a pitcher portion (C) of the empty space leading directly to the fixture 200 under the fixture 200, wherein the pitcher (C) is connected to the pitcher discharge pipe (C1) do. In the permeable body 300, the permeable part C becomes a space in which water passing through the specimen of the porous material fixedly installed on the holder 200 is collected. However, since the permeation discharge pipe (C1) of the permeable body is connected to the liquid container 400, the water collected in the permeation unit (C) is discharged to the liquid container 400 through the final permeation discharge pipe (C1). Thus, once the discharge is made through the permeate discharge pipe (C1), it is possible to maintain the water level at the discharge height of the permeate discharge pipe (C1), and as a result, the water level for the discharge height of the permeate discharge pipe (C1) and the hydrostatic head supply described above are examined. The water level in the water supply unit A of the device allows the water head difference Δ h to be supplied and discharged. However, if the pitcher body 300 is configured to be mounted on the bottom of the horizontal adjustment foot 340 can easily fit the level of the pitcher (C) irrespective of the installation place to maintain the water level of the pitcher (C) Will help.

As the water collected in the liquid container 400, it is possible to know the flow rate (Q) required for the calculation of the permeability coefficient. In particular, the permeability coefficient is calculated by measuring the flow rate by the amount of water collected according to the required time (t). At this time, if the container adopts a measuring scale such as a beaker or a measuring cylinder as the liquid container 400, the flow rate can be easily known by reading the measuring scale, but in order to know the exact flow rate, the weight of the water contained in the liquid container 400 is measured. After accurate measurement, calculate the volume by calculating the volume at that temperature from the density of water at the test temperature and multiplying this volume by the viscosity ratio of water at that temperature.

1 to 5 show the structure provided to the rotatable head supply device 100 is rotatably coupled to the water permeable body 300 in the water level permeability test apparatus of the present invention. That is, the hydrostatic head supply device 100 is rotatably coupled with the water-permeable body 300 so that the hydrostatic head supply device 100 is detachably coupled with the holder 200.

Specifically, in the present invention, the head of the purified water supply device 100 is divided into the water supply part (A) and the overflow part (B), and the lid 111 is provided to be opened and closed on the ceiling, and the opening in the water supply part (A) bottom. The housing 110 is provided; A wall wall 120 mounted in the housing 110 at a height lower than that of the wall of the housing 110 to divide the housing 110 into a water supply part A and a overflow part B; An expansion connection pipe 130 provided below the water supply part A of the housing and extending to the fixture 200 while extending the water supply A to the bottom of the housing 110; A detachable coupling part 140 mounted at the lower end of the expansion connection pipe 130; It is proposed to be configured to include; a hinge coupling portion 150 mounted to the housing 110 while neighboring the expansion connection tube 130. Of course, the fixing stand 200 is provided with a detachable coupling part 240 of the fixing part corresponding to the detachable coupling part 140 of the hydrostatic head supply device, and as a connecting fixture 145 such as a bracket, a removable coupling part of the fixing table and the hydrostatic head supply device ( 140 and 240 are detachably coupled to each other, the pitcher main body 300 is provided with a hinge coupling part 350 of the pitcher body corresponding to the hinge coupling part 150 of the hydrostatic head supply device is a hydrostatic head supply device as a hinge shaft 155 And hinge coupling portions 150 and 250 of the permeable body are hinged to each other. At this time, it is preferable that the leakage preventing packing 230 is further provided between the detachable coupler 140 and the detachable coupler 240 of the fixed head supply device.

As a result, the hydrostatic head supply device 100 may be detached from the holder 200 or coupled to the holder 200 by rotation by the hinge shaft 155 as shown in FIG. 5. In particular, in the present invention, the housing 110 of the hydrostatic head supply device is configured to be provided with a lid 111 on the ceiling, which is a hydrostatic head supply device 100, even when the hydrostatic head supply device 100 is fixedly coupled to the holder 200. In particular, it is to make it possible to visually check the state inside the housing). Of course, the lid 111 to be equipped with a handle 112 will be configured to facilitate the opening and closing of the lid.

On the other hand, the present invention proposes to apply the production mold used for the production of the porous material to the fixing stand 200 as it is or to apply an air mold that shrinks and expands by the air pressure supplied from the pneumatic regulator (220). This is to allow the permeability test while applying the porous material prepared from the asphalt mixture to the specimen state (manufacturing mold) or the collected core state (air mold) in the production mold as it is. In other words, when the fabrication of the specimen of the porous material is completed, the specimen and the production mold are brought into a state of being integrated with each other without removing the production mold, and the state is used as the fixing stand 200, or a part of the construction site is collected. The air mold is used as the fixing table 200 by taking the core (which is made of only a porous material) and bringing it into close contact with the air mold. However, considering that the permeation can be made through the gap between the production mold and the specimen, the air mold that can minimize the generation of the permeation through the gap by suppressing the occurrence of the gap with the specimen by expansion by air pressure will be more advantageous. .

Particularly, in the present invention, the mold holder 210 is further provided below the manufacturing mold or the air mold proposed as the fixing stand 200, and the mold holder 210 is easily mounted while being stably mounted on the manufacturing mold or the air mold. Make it possible. In this case, between the mold holder 210 and the mold to provide a leak-proof packing 230 so that water does not leak.

Table 1 below shows an example of obtaining a permeability coefficient at 15 ° C. using the water level permeability test apparatus of FIGS. 1 to 5.

Specimen Measures Calculated Value Permeability coefficient (cm / sec) Kinds Specimen thickness (cm) Specimen diameter (cm) Measuring time (sec) Spill Quantity (g) Measuring temperature (℃) Density of water Viscosity ratio of water Cross-sectional area (㎠) Effluent volume (cm 3) exam 15 ℃ 15 ℃ J1 6.73175 10.16 91 5004.2 17.4 0.9988 0.95 81.07 5010.21 0.14700 0.13965 0.32 J2 6.51325 10.16 25.55 4108.6 17.4 0.9988 0.95 81.07 4113.54 0.41590 0.39510 J3 7.1275 10.16 30.85 4980.7 17.4 0.9988 0.95 81.07 4986.68 0.45694 0.43409 O1 6.929 10.16 37.91 4731.3 17.4 0.9988 0.95 81.07 4736.98 0.34338 0.32622 0.23 O2 6.71325 10.16 60.66 4645.7 17.4 0.9988 0.95 81.07 4651.28 0.20416 0.19395 O3 6.6245 10.16 63.12 4571.3 17.4 0.9988 0.95 81.07 4576.79 0.19051 0.18098

Although the present invention has been described in detail with reference to the described embodiments, those skilled in the art to which the present invention pertains will be capable of various substitutions, additions and modifications without departing from the technical spirit described above. It is to be understood that such modified embodiments also fall within the protection scope of the present invention as defined by the appended claims below.

1 to 4 are a perspective view, a front view, a side view and a plan view respectively showing an embodiment of the water level permeability test apparatus according to the present invention.

FIG. 5 is a front view of a state in which the hydrostatic head supplying device of FIG. 1 is rotated and separated from the holder.

<Description of the symbols for the main parts of the drawings>

100: water head feeder

110: housing 120: overflow wall

130: expansion connector 140: removable coupling portion

150: hinge coupling portion

200: holder 210: mold holder

300: pitcher main body

400: liquid container 500: scales

A: water supply part A1: water supply pipe

B: Overflow department B1: Overflow discharge pipe

C: pitcher C1: pitcher discharge pipe

Claims (8)

An apparatus for testing the permeability of a porous material, The internal space is divided into a water supply part (A) and a overflow part (B) so as to maintain the head of water, and is provided with a water supply pipe (A1) connected with the water supply part (A), and a overflow discharge pipe (B1) connected with the overflow part (B). A hydrostatic head supply device 100; A fixture 200 which is provided to communicate directly with the water supply unit A of the hydrostatic head supply device below the hydrostatic head supply device, and is disposed so that a porous material to test the water permeability is placed and fixedly disposed; A permeable body 300 provided with a permeable part C in an empty space leading directly to the fixture 200 under the fixture 200, and having a permeate discharge pipe C1 connected to the permeable part C; And, And a liquid container 400 connected to the permeable discharge pipe C1 of the permeable body; The hydrostatic head supply device 100 is a hydrostatic permeability test apparatus of the porous material, characterized in that the detachable coupling with the holder 200. In claim 1, The hydrostatic head supply device 100 is a water level permeability test apparatus of the porous material, characterized in that to be rotatably coupled to the water permeable body (300). In claim 2, The purified head supply device 100, An inner space divided into a water supply part A and a overflow part B, and a housing 111 having an opening at a bottom of the water supply part A while a lid 111 is provided to be opened and closed on a ceiling; A wall wall 120 mounted in the housing 110 at a height lower than that of the wall of the housing 110 to divide the housing 110 into a water supply part A and a overflow part B; An expansion connection pipe 130 provided below the water supply part A of the housing and extending to the fixture 200 while extending the water supply part A to the bottom of the housing 110; A detachable coupling part 140 mounted at the lower end of the expansion connection pipe 130; And a hinge coupler 150 mounted to the housing 110 while being adjacent to the expansion connector 130. The fixture 200 is provided with a detachable coupling portion 240 corresponding to the detachable coupling portion 140 of the hydrostatic head supply device as a fixing fixture 145 detachable coupling portions 140, 240 of the fixed head and the hydrostatic head supply device. Are desorbed from each other, The pitcher main body 300 includes a hinge coupler 250 of the pitcher body corresponding to the hinge coupler 150 of the hydrostatic head supply device, and is a hinge shaft 155 as a hinge shaft 155 of the hydrostatic head supply device and the pitcher body ( 150, 350 is a water level permeability test apparatus of the porous material, characterized in that the hinge hinge. In claim 3, The water permeability permeability test apparatus of the porous material, characterized in that the leakage preventing packing 230 is further provided between the detachable coupling portion 140 and the decoupling coupling portion 240 of the fixed head supply device. The method according to any one of claims 1 to 4, The fixture 200 is a water level permeability test apparatus of the porous material, characterized in that the manufacturing mold used for the production of the specimen of the porous material. The method according to any one of claims 1 to 4, The fixture 200 is a water level permeability test apparatus of the porous material, characterized in that the air mold contracted and expanded by the air pressure supplied from the pneumatic regulator (220). The method according to any one of claims 1 to 4, The purified water head supply device 100 is a water level permeability test apparatus of the porous material, characterized in that the water supply control valve is provided in the water supply (A). The method according to any one of claims 1 to 4, The water permeable body 300 is a water level permeability test apparatus of the porous material, characterized in that the horizontal adjustment support 340 is mounted on the bottom.

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