JP4775733B2 - Film forming apparatus and method for porous inorganic powder on porous concrete structure - Google Patents

Description

  The present invention relates to the formation of a porous inorganic powder on a porous concrete structure that forms a film containing the porous inorganic powder on the outer surface of the porous concrete structure having continuous voids and the inner wall surface portion on the inner void side. The present invention relates to an apparatus and a film forming method thereof.

The ceramic porous body has many voids (pores) inside, and has been applied using a useful function taking advantage of this property. By using this as a structural element, the ceramic porous body has functions such as weight reduction, heat insulation, sound absorption, vibration isolation, shock resistance, adsorption, etc., and by setting the size and distribution conditions of the pores, It also has ion exchange, selective permeation, selective adsorption, separation functions and the like. Among them, zeolite is widely used as a catalyst carrier, an adsorbent, an ion exchanger, and the like, and is known to have a wide range of application fields. Patent Document 1 is a proposal regarding a method for producing artificial zeolite and a concrete structure containing artificial zeolite, which encourages the growth of small plants such as moss and grass.
JP 2002-293534 A

  In the concrete structure containing the artificial zeolite of Patent Document 1 described above, the powder raw material is hydrothermally treated with an alkaline water suspension to form Na-type or K-type artificial zeolite, which is immersed in an aqueous ammonium chloride suspension. An NH4 type artificial zeolite produced by ion exchange is included in a concrete material to form a plantlet growing layer block 2, which is integrally formed in a stacked block body and fixed to the block body. . In addition, it has been suggested that the artificial zeolite is fixed in a form of surface contact with the structure instead of being integrally molded, or immersed in a mortar paste, or further sprayed. An inexpensive and economical method for fixing artificial zeolite to concrete is immersion. On the other hand, when applying the excellent function of artificial zeolite to fish reef production, water quality improvement structures, road slope greening, and deodorizing functional materials, combining porous structure with this artificial zeolite will increase the amount of seawater. It is thought that the function of purifying freshwater, greening and deodorizing can be obtained, or it can be used as a fish reef itself, but at present there is no suggestion that it can be put into practical use, and its appearance has been expected. In particular, the adhering method of artificial zeolite to a porous structure is difficult, and there has been a long-awaited appearance of a structure such as practical aquatic plant growth at low cost.

  The present invention has been made in view of the above-described conventional problems, and one object of the present invention is to ensure a porous structure over the entire inner wall surface and outer surface of a porous concrete structure having continuous voids in a very simple manner. Attaching a coating of inorganic powder to promote the settlement of microorganisms on the porous concrete structure itself, ion exchange with porous inorganic powder, adsorption of aquatic plants such as algae and aquatic plants by adsorption function An object of the present invention is to provide an apparatus and method for forming a porous inorganic powder on a porous concrete structure. Another object of the present invention is to provide an apparatus and a method for forming a porous inorganic powder on a porous concrete structure, which is inexpensive and excellent in practical use.

  In order to achieve the above object, the present invention involves immersing a part or all of a porous concrete structure in a suspension containing cement and a porous inorganic powder, and stirring and mixing the suspension. A porous inorganic powder film characterized in that a porous inorganic powder film is formed on the surface of structural elements inside and outside the porous concrete structure in suspension while applying vibration to the porous concrete structure. It consists of a film-forming method on a porous concrete structure.

  At that time, the porous concrete structure may be moved in the suspension to perform gas-liquid exchange in the pores inside the structure. Since the porous concrete structure itself is moved in the suspension while applying vibration to the porous concrete structure itself, a film is formed on the wall surface portion of the pores (voids) inside the structure with a good density. The movement of the structure in the suspension may be a movement in the horizontal direction, an oblique direction, a vertical direction, or any other direction, or a rotational displacement in a rotating or stationary state. In the vertical movement, when a suspension support device is used, it can be realized by vertical movement by this operation. Further, in the horizontal or lateral movement, the cylinder device having an advancing / retreating rod may be used for the movement.

  Further, it is more preferable to perform gas-liquid exchange in the pores inside the structure while rotating the structure itself while maintaining the position of the porous concrete structure in the suspension.

  Further, the porous concrete structure is supported by rotating the suspension support member in a state where the porous concrete structure is suspended by the suspension support member, and the gas-liquid exchange is performed in the pores inside the structure while rotating the supported porous concrete structure. It is good to do so.

Furthermore, it is more preferable that the porous inorganic powder is composed of zeolite.

  The present invention also includes a storage tank 14 for storing a suspension 12 containing cement and a porous inorganic powder, a stirring and mixing device 16 for stirring and mixing the suspension 12 in the storage tank 14, and a suspension. A porous means including a supporting means (20) for supporting a part or all of the porous concrete structure 18 immersed in the liquid 12, and a vibration device 22 for applying vibration to the immersed and supported porous concrete structure 18 itself. It is comprised from the film-forming apparatus to the porous concrete structure of a porous inorganic powder.

  Moreover, it is good to provide the moving means (30) which forcibly moves the porous concrete structure 18 itself which supported one part or all part in the suspension 12 within a suspension.

  The support means (20) may include a suspension member 24 that supports the porous concrete structure 18 while directly holding it.

  Further, the support means (20) and the vibration device 22 may be coupled to support the porous concrete structure 18 via the suspension member 24 by supporting the vibration device.

  Further, the moving means has a revolving drive device 30 that revolves the suspension support member in a state where the porous concrete structure 18 is suspended by the suspension support member 24, and has a structure in which the supported porous concrete structure 18 is rotated. It is preferable to perform gas-liquid exchange in the pores P inside the body 18.

  According to the method for forming a porous inorganic powder on a porous concrete structure of the present invention, a part or all of the porous concrete structure is immersed in a suspension containing cement and the porous inorganic powder. Then, a porous inorganic powder film is formed on the surface of the structural element inside and outside the porous concrete structure in the suspension while applying vibration to the porous concrete structure while stirring and mixing the suspension. Therefore, with a simple structure, it is possible to reliably form a porous inorganic powder coating not only on the outer surface of the porous concrete structure but also on the inner wall surface of the porous concrete structure, ensuring a wide range of microorganisms on the porous concrete structure itself. In addition, the water purification function is performed, and the porous inorganic powder is reliably formed on the large specific surface area, so algae cultivation, aquatic plant growth, road slope greening Deodorization function further it is possible to reliably hold the reef function. In particular, when applied as a deodorizing functional material, it can be effectively implemented by being disposed in a gas passage from an odor source.

  In addition, by moving or swinging the porous concrete structure in the suspension to perform gas-liquid exchange in the pores inside the structure, air stored in the voids in the porous concrete structure is removed from the continuous voids. The liquid and air can be reliably exchanged by discharging, and a homogeneous and high-density porous inorganic powder film can be formed.

  In addition, by allowing gas-liquid exchange in the pores inside the structure while rotating the structure itself while maintaining the position in the suspension of the porous concrete structure, In addition, the work space can be reduced, and the film can be formed on the structure in a suspended state in a shallow storage tank, facilitating visual work, and quick and short film formation. Can be realized.

  In addition, the porous concrete structure is supported by rotating the suspension support member while the porous concrete structure is suspended by the suspension support member, and the gas-liquid exchange is performed in the pores inside the structure while rotating the supported porous concrete structure. As a result, the work space can be reduced in size and the work can be facilitated, and the replacement work by the suspension support member can be performed. Therefore, the change-over work when the structure to be processed is replaced can be easily and quickly performed. In addition, the configuration is very simple and the maintainability is good.

  Further, according to the film forming apparatus for porous inorganic powder of the present invention on the porous concrete structure, the storage tank for storing the suspension containing the cement and the porous inorganic powder, and the storage tank A stirring and mixing device for stirring and mixing the suspension, a supporting means for supporting the porous concrete structure in a state where part or all of the porous concrete structure is immersed in the suspension, and applying vibration to the immersed and supported porous concrete structure itself The porous inorganic powder coating can be reliably formed not only on the outer surface of the porous concrete structure but also on the inner wall surface of the porous concrete structure with a simple structure. As well as ensuring a wide range of microbial growth by performing water purification functions, and forming a porous inorganic powder on the large specific surface area, Raw plant epiphytic, more can be reliably held reef function.

  The porous concrete structure itself that is supported in part or in whole by the suspension is provided with a moving means for forcibly moving the suspension within the suspension, so that it is stored in the voids in the porous concrete structure. Air can be exhaled from the continuous voids to reliably exchange liquid and air to form a homogeneous, high-density porous inorganic powder coating.

  In addition, since the support means includes a suspension member that supports the porous concrete structure while directly holding it, the work space can be reduced in size and work can be facilitated, and the suspension member can be replaced. Since the work may be performed, the change-over work when replacing the structure to be processed can be easily and quickly performed. In addition, the configuration is very simple and the maintainability is good.

  In addition, the supporting means and the vibration device are connected to each other, and by supporting the vibration device, the porous concrete structure is supported via the suspension member, so that the vibration device is separately prepared and the porous concrete structure is provided. A device that supports the body is not required, and the work preparation can be done easily and quickly.

  Further, the moving means has a revolving drive device that revolves the suspension support member in a state where the porous concrete structure is suspended by the suspension support member, and the fine structure inside the structure is rotated while rotating the supported porous concrete structure. Since it is configured to allow gas-liquid exchange in the hole, work in a small storage tank is possible, the work space can be reduced, and the structure in a suspended state in a shallow storage tank A film can be formed on the body, and the visual operation is facilitated, and a rapid and short-time film formation operation can be realized.

  In addition, if the porous inorganic powder is zeolite, combined with the high ion exchange function, adsorption function, etc. of the zeolite and the high porosity structure of the porous concrete structure, Alternatively, it can be applied as a part thereof, and further water purification can be performed.

  The best mode for carrying out the present invention will be described below with reference to the accompanying drawings. The present invention relates to a film forming apparatus and method for forming a porous inorganic powder on a porous concrete structure. As the best mode for carrying out the present invention, hereinafter, a porous concrete structure of a porous inorganic powder is described below. The film forming method will be described while explaining the body.

  FIG. 1 and FIG. 2 show the basic configuration of a film forming apparatus (hereinafter referred to as “film forming apparatus”) 10 on a porous concrete structure of a porous inorganic powder according to the present invention. The apparatus 10 includes a storage tank 14 for storing the suspension 12, a stirring and mixing apparatus 16 for stirring and mixing the suspension 12 in the storage tank, and a part or all of the porous concrete structure 18 in the suspension. Is supported, and a vibration device 22 that applies vibration to the porous concrete structure 18 is provided.

  The suspension 12 is, for example, a liquid in which cement and a porous inorganic powder are mixed in water, and a mixed suspension of cement as an adhesive binder and the porous inorganic powder is used as an object. The porous concrete structure is fixed on the inner wall and outer surface of the void, that is, the inner and outer surfaces. The cement is a hydraulic cement, such as Portland cement, silica cement, alumina cement, blast furnace cement, and lime slag cement. The porous inorganic powder is a powder having a large number of pores, and is fixed to the inner and outer surfaces of the porous concrete via an adhesive binder to express a specific function. As the first function of this porous inorganic powder, for example, when it is fixed to a structure, etc., the weight reduction function, heat insulation function, sound absorption function, vibration isolation function, shock resistance function (buffer function), adsorption It has functions. The second function includes, for example, a selective adsorption function, an ion exchange function, a selective filtration function, a selective permeation function, and a separation function. Therefore, the water purification function is provided by providing a vast area of microorganisms due to the high porosity of porous concrete, and a base material for seaweed and algae growth is formed. It can also function as a fish reef. It can also be applied as a road slope greening material and a deodorizing functional material. In the present embodiment, the porous inorganic powder is composed of an artificial zeolite powder and promotes the growth of aquatic plants in seawater, fresh water, etc. via the zeolite adsorption function and ion exchange function, It contributes to the growth of seaweeds such as amago and kajime, which play an important role in water purification and marine resources. Zeolite is a crystalline aluminum silicate represented by M2 / nO.Al2O3.ySiO2.wH2O (y.gtoreq., N is the valence of the cation M, and w is the number of water molecules contained in the voids). In the framework structure of zeolite, channels with voids are three-dimensionally spread and occupied by cations and moisture. This is because synthetic zeolite has a property of retaining cations such as Na +, K +, and Ca2 + in order to compensate for the lack of positive charge because a part of Si4 + is substituted with Al3 +. . Because these ions are mobile, they have a much higher cation exchange capacity than layered clays. Zeolite has various starting materials, and its production method is also different. Examples of starting materials include sodium silicate, sodium aluminate, silica gel (clay skeleton silica), and caustic soda as type A. As the X type, there are sodium silicate and sodium aluminate. Furthermore, examples of the Y type include sodium silicate and sodium aluminate. Zeolite preferably has fine pores having a pore size of 0.3 to 10 nm, for example, and performs these functions stably. In the embodiment, for example, a particle having a particle size of about 10 μm to 30 μm is used, and the particle size of the cement particle is adjusted to be approximately the same. This makes it difficult for these particles to be clogged in the internal voids of the porous concrete, and the surface film formation and the subsequent ion exchange function can be specifically realized. The porous inorganic powder is not limited to zeolite but may be, for example, silica gel, alumina gel, activated carbon, diatomaceous earth, or other porous inorganic substances. The suspension 12 may be, for example, 80% cement by weight, 15% artificial zeolite, 5% other iron, and the like, and appropriate water may be added to the suspension 12 to have a smooth fluidity. The ions of the iron compound are adsorbed by the ion exchange function of the zeolite, and these iron contents adsorb phosphorus that causes eutrophication, and can contribute to water purification.

  1 and 2, a stirring and mixing device 16 for stirring and mixing the suspension 12 in the storage tank 14 is provided. In this embodiment, the stirring and mixing device 16 is composed of a sand pump disposed in the storage tank 14, forcibly mixing and stirring the suspension in the storage tank by causing a forced water flow, and cement or porous inorganic powder. The product should not separate from the water and settle on the bottom.

  The porous concrete structure 18 is supported by the support device 20 in a state where a part or all of the porous concrete structure 18 is immersed in the suspension 12. The porous concrete structure 18 is a block structure having an arbitrary shape made of porous concrete, and has a continuous void P as shown in FIGS. In this embodiment, for example, as shown in FIG. 1, the shape is a bowl shape, but a cylindrical shape, a plate shape, a solid quadrangular shape, other solid polygonal shapes, an irregular shape, or the like may be used. In the present embodiment, as will be described later, it rotates while being suspended by a belt-like belt, and a saddle shape, a cylindrical shape, a polygonal cylindrical shape or the like is preferable as long as it is limited to this embodiment. Porous concrete is not concrete as a closed-cell molded body adopted for lightweight concrete, but the proportion of fine aggregate to coarse aggregate is extremely low compared to ordinary concrete, and the open pores are around 20-30%. It is a porous concrete having a rate, and microorganisms can settle inhabit in countless holes in the internal voids. The porous concrete structure 18 is placed in, for example, a harbor, coastal sea area, lake, river, swamp, lake water, and the like, and is placed on an algae basin, aquatic plant growth base, fish reef, water quality improvement base, road slope greening material, deodorization Applied as a functional material.

  The support device 20 that supports a part of or all of the porous concrete structure 18 in a dipped state may support the porous concrete structure 18 placed on the upper surface side. It is the support means which supports in the suspended state from the suspension support member 24 from. Specifically, the suspension support member 24 of the present embodiment is composed of an endless belt, and in particular, the two belts 24A are spaced at two locations so as to directly hold the porous concrete structure 18 inside the loop. The porous concrete structure 18 is suspended by being hung around. The support device 20 includes, for example, a suspension rope 26 that is suspended by a suspension mechanism such as a hoist (not shown), a pulley 301 that is supported by the suspension rope 26 and adjusts the endless belt 24A to the outer periphery, and an endless belt. And a suspension support member 24 as a belt.

  In the present embodiment, the support device 20 is composed of, for example, an orbiting drive device 30 incorporating a forward / reverse rotation motor, and belt belts fixed to the rotating shafts of the motors at both ends of the case 32 of the orbital drive device 30, respectively. A pulley 301 is attached and rotates forward and backward around a horizontal axis. The orbiting drive device 30 is a moving means for forcibly moving the porous concrete structure 18 itself supported by the suspension 12 in part or in whole within the suspension. The onigiri-type porous concrete structure 18 is composed of a circular drive device 30 that rotates and displaces the position of the porous concrete structure 18 in a stationary state. That is, the moving means is not limited to linear movement such as horizontal movement, vertical movement, diagonal movement, or curved movement of the porous concrete structure in the suspension, or a combination of these movements. Including those that change the angle without changing the position. In this embodiment, each endless belt-like belt 24A is thus tuned in a state where the upper part is wound around the outer periphery of the pulley 301 and the lower part is wound around the outer periphery of the porous concrete structure 18. Is supported on the inside. The porous concrete structure 18 may be processed in a state in which the entire suspension 12 is immersed, or may be supported with the upper portion of the structure 18 slightly exposed to the atmosphere as shown in FIG. Alternatively, the treatment may be performed by supporting about half of the substrate as shown in FIG.

  In the present embodiment, the vibration device 22 includes a vibration motor that is externally fixed to the case 32 of the orbiting drive device 30, and transmits this vibration to the suspension support member 24 while applying minute vibration to the orbiting drive device 30. The porous concrete structure 18 is indirectly slightly vibrated through the support member. By slightly vibrating the porous concrete structure 18, it is possible to reliably form a porous inorganic powder coating formed on the voids of the bolus concrete and the inner and outer wall surfaces thereof. In FIG. 1, reference numeral 34 denotes a suspension bracket with a hook 37 arranged on the lower end side of a suspension rope from a hoist movable in the horizontal direction, and 36 is locked to the hook 37. The vibration buffering ring 38 is a wire that suspends the orbiting drive device 30 from the ring 36.

  Next, with reference to FIG. 6 as well, the film forming method for forming the porous inorganic powder on the porous concrete structure together with the action of the film forming apparatus for the porous inorganic powder on the porous concrete structure of the present embodiment. explain. First, a suspension 12 is prepared by mixing artificial zeolite powder, cement, and water at a required mixing ratio. The suspension is put into the storage tank 14 (S1), and the endless belts 24A and 24A are respectively tuned to the pulleys 301 of the circular drive device 30 supported by the suspension branch 24, and the two belts The lower end side is hung from below so as to hold the porous concrete structure 18 and the height of the suspension support is adjusted so that, for example, about two-thirds of the porous concrete structure 18 is immersed in the suspension ( S2). Next, the sand pump as the stirring and mixing device is started and the suspension 12 is stirred and mixed by the discharge flow so that the cement and the porous inorganic powder particles are uniformly dispersed without causing precipitation separation ( S3)-(a). Further, the vibration device 22 is activated to apply vibration to the porous concrete structure 18 itself (S3)-(b), and at the same time, the circumferential drive device 30 is driven to rotate the porous concrete structure 18 itself (S3)-( c). The rotation by the circular drive device 30 may be reversely rotated by reversing the rotation direction periodically or aperiodically. It is possible to rotate only at a required angle without necessarily rotating around the entire circumference. Further, the hoist device may be operated so that the entire orbiting drive device moves up and down or moves in the horizontal direction at the same time. As described above, the porous concrete structure 18 immersed in the suspension is vibrated by being slightly vibrated and is rotationally displaced. At this time, the porous concrete structure 18 stays on the wall surfaces of the pores inside the porous concrete structure. When the structure rotates or reverses, the air escapes from the continuous gap, floats to the atmosphere, and is released. During this time, the suspension components enter the air retention space and exchange gas-liquid, ensuring that the zeolite particles and cement particles are finely divided. It is taken in the inner wall surface of the hole and securely fixed as a film L (see FIG. 4) or a layer. When the immersed structure 18 is lifted from the liquid and excess liquid is allowed to flow out, and is cured for about one week as necessary, the coating can be firmly fixed to the inner and outer surfaces of the structure. In addition, when preparing a suspension as a raw material for an adhesion coating on a structure, for example, an additive for increasing the fluidity by a surface-active function to improve adhesion, and attracting aquatic plants such as seaweed and diatom You may make it mix the iron compound powder which promotes growth and active growth. By this, unlike the method of simply immersing the structure etc. in the suspension by the soaking method and pulling it up, it reaches the inner wall surface of the porous concrete structure which is a continuous void body having a porosity of about 30%. Zeolite particle membranes are formed reliably, the area of the vast microorganisms is secured by the porous concrete structure, aquatic plants and algae cultivation are greatly promoted through the adsorption or ion exchange function, and the decomposition action of the microorganisms is achieved. It can contribute to water quality purification.

  In the embodiment, the discharge from the sand pump is performed in the suspension. For example, as shown in FIG. 7, one end discharge hose 161 protrudes from the liquid to the atmosphere and a part is exposed to the atmosphere from the atmosphere side. Alternatively, the suction liquid may be discharged toward the porous concrete structure so that the suspension is mixed and stirred together with injection into the voids of the structure. Furthermore, as shown in FIG. 8, the vibration device 22 is not attached to the case 32 of the orbital drive device 30, but directly vibrates the porous concrete structure while being supported by a separate support mechanism. Also good.

  Porous concrete structures with porous inorganic powder films on the inner and outer walls as described above are placed and installed at appropriate locations in the water as seaweed cultivation bases, water purification bases or fish reefs in the sea, lakes, etc. Alternatively, it can be fixed by anchor means as required. In addition, it can be applied as a planting flower bed material, foundation, or other greening material on road slopes, or as a deodorizing functional material arranged in a gas passage from an odor source.

  The film forming apparatus and method for the porous inorganic powder of the present invention described above on the porous concrete structure and the method thereof are not limited to the configuration of only the above-described embodiment, but the present invention described in the claims. Any modification may be made without departing from the essence of the invention.

  The apparatus and method for forming a porous inorganic powder on a porous concrete structure according to the present invention provides a reliable method for forming a porous concrete structure that can be suitably used as an algae cultivating substrate, a water purification substrate, or a fish reef. It can be applied to various film formation.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an overall perspective explanatory view of a film forming apparatus for porous inorganic powders on a porous concrete structure according to an embodiment of the present invention. It is a conceptual effect explanatory drawing of the apparatus of FIG. FIG. 2 is a partially enlarged perspective explanatory view of the structure of FIG. 1. It is a cross-sectional explanatory drawing of the structure of FIG. It is another conceptual effect explanatory drawing of the apparatus of FIG. It is a flowchart figure explaining the film-forming method to the porous concrete structure of the porous inorganic powdery material of this invention. It is another conceptual effect explanatory drawing of the apparatus of FIG. It is another conceptual effect explanatory drawing of the apparatus of FIG.

DESCRIPTION OF SYMBOLS 10 Film-forming apparatus 12 Suspension 14 Storage tank 16 Stirring mixing apparatus 18 Porous concrete structure 20 Support apparatus 22 Vibrating apparatus 24 Suspension support member 24A Endless belt belt 30 Circulation drive device 301 Pulley for belt adjustment belt

Claims (10)

Immerse part or all of the porous concrete structure in a suspension containing cement and porous inorganic powder,
Forming a porous inorganic powder film on the surface of the structural element inside and outside the porous concrete structure in the suspension while applying vibration to the porous concrete structure while stirring and mixing the suspension. A method for forming a porous inorganic powder on a porous concrete structure.   2. The porous concrete structure of porous inorganic powder according to claim 1, wherein the porous concrete structure is moved in the suspension so as to perform gas-liquid exchange in pores inside the structure. Method of film formation on the body.   The gas-liquid exchange in the pores inside the structure is performed while rotating the structure itself while maintaining the position of the porous concrete structure in the suspension. A method for forming a film on the porous concrete structure of the porous inorganic powder according to 1 or 2.   The porous concrete structure supported by rotating the suspension support member in a state where the porous concrete structure is suspended by the suspension support member is made to perform gas-liquid exchange in the pores inside the structure while rotating. A method for forming a film on a porous concrete structure of a porous inorganic powder according to any one of claims 1 to 3. The method for forming a film on a porous concrete structure of a porous inorganic powder according to any one of claims 1 to 4, wherein the porous inorganic powder is zeolite . A storage tank for storing a suspension containing cement and a porous inorganic powder;
A stirring and mixing device for stirring and mixing the suspension in the storage tank;
A support means for supporting a part of or all of the porous concrete structure immersed in the suspension;
A film forming apparatus for forming a porous inorganic powder on a porous concrete structure, comprising: a vibration device for applying vibration to the porous concrete structure itself supported by immersion. 7. The porous inorganic powder according to claim 6 , further comprising a moving means for forcibly moving the porous concrete structure itself supported partially or entirely in the suspension within the suspension. Film forming device for porous concrete structures. The apparatus for forming a porous inorganic powder on a porous concrete structure according to claim 6 or 7, wherein the supporting means includes a suspension member that supports the porous concrete structure in a state of being directly held. . 9. The porous inorganic powder according to claim 6, wherein the support means and the vibration device are connected to support the porous concrete structure via the suspension member by supporting the vibration device. Film forming device for porous concrete structure. The moving means has a revolving drive device that revolves the suspension support member in a state where the porous concrete structure is suspended by the suspension support member,
The porous inorganic powder according to any one of claims 6 to 9 , wherein gas-liquid exchange is performed in pores inside the structure while rotating the supported porous concrete structure. Film forming device for porous concrete structure.

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