JP2002128270A - Splaying method for spraying material and material conveyance method in spraying device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a material conveyance method capable of ensuring a sufficient conveyance distance, improving the workability of spraying work after conveyance, and improving a sound absorbing rate of a spraying type sound absorbing material by controlling a condition of a material before conveyance. SOLUTION: After a surface of a solid material is wetted by liquid, the wetted surface of the solid material is covered with fine particle materials to form a lumplike material, and a group of lumplike materials are conveyed by compressed air.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to, for example, a method of spraying a material to be sprayed and a method of conveying a material in a spraying apparatus.

2. Description of the Related Art Conventionally, for example, when a sprayed material is conveyed in a spraying device, a so-called dry material conveying method or a wet material conveying method has been adopted.

[0003] Here, the dry-type conveying material method means that, as shown in FIG. 3, a solid material such as aggregate or cement and a powder material are kneaded with a mixer in a dry state, and then put into an apparatus. In this method, these materials are conveyed by a conveying conduit such as a hose, and the material and water are mixed and sprayed when the material is ejected from a nozzle at the tip of the conveying conduit such as a hose. .

Further, as shown in FIG. 4, a wet-type conveying material method is a method in which a solid material such as aggregate, a powder material such as cement, and a sufficient amount of water are kneaded and mixed in advance to form a semi-liquid material ( (Mortar-like) material to be sprayed, and this semi-fluid material is fed into a spraying device and transported through a transport pipe such as a hose. The material is ejected from a nozzle at the tip of the transport pipe such as a hose. And spraying was performed.

However, in the case of the dry transfer method, when the above-mentioned material is ejected from the nozzle at the end of the transfer pipe, the dry material (powder material such as cement, aggregate, etc.) is used. ) And a liquid such as water, it has not been easy to obtain a sufficiently uniform mixed state of the state sprayed on the wall surface or the like.

That is, an ideal porous state (a state in which the inside is uniform and sufficiently rough) in the sprayed material after spraying.
Is difficult to obtain.

Further, in order to realize an even mixing state,
A certain limitation was also imposed on the efficiency of the spraying operation, which caused the yield to deteriorate.

Further, if the mixing state of water and the material is not so good from the nozzle, powder in a dry state is also ejected, so that dust is generated in the spraying operation, which causes deterioration of the working environment and working efficiency. I was

On the other hand, in the case of a wet transfer method, a solid material such as aggregate, a powder material such as cement, and a liquid such as water are kneaded in advance, and a semi-fluid state (mortar state) is obtained. When transporting this semi-fluid material using a transport pipeline, a solid material such as aggregate and a semi-fluid powder material such as cement may be separated or may be conveyed to the inner surface of the transport pipeline. The material in the form of a semi-liquid adheres,
In some cases, the transfer pipeline was blocked.

Accordingly, it has been difficult to carry a semi-fluid material over a long distance by using a hose or the like.

[0009] In the case of such a wet transfer method, the transfer air pressure is increased to increase the transfer speed in order to pressurize the semi-fluid material having a high viscosity through the transfer line (dry 1.5 transfer method). About twice).

[0010] For this reason, if this method is used in the spraying, the rebound rate of the material sprayed on the wall surface or the like becomes as high as about 30%, and it is difficult to control the spraying device (air conveying device). It was difficult to obtain a porous state in the molded sound absorbing material after spraying.

Therefore, in the spraying of the sound absorbing material, it has not been easy to obtain an ideal porous molded material in the sound absorbing material after spraying in either of the dry conveyance and the wet conveyance.

[0012] Because of this, the construction efficiency (yield) is not improved in any of the transporting methods, and the molded sound absorbing material has poor sound absorbing characteristics such as a drop in sound absorbing coefficient with respect to a certain frequency band sound. The impact was also a concern.

Thus, the present invention has been made in order to solve the above-mentioned conventional problems. For example, a relatively long conveying distance can be obtained by molding the state of the sprayed material before the conveying into a constant state. To improve the workability such as spraying work after conveyance, and improve the molding state of the sound absorbing material after spraying to improve the sound absorption coefficient, etc. It is intended to be provided.

Accordingly, the present invention provides
After wetting the surface of the solid material with the liquid, the surface of the wet solid material is coated with a powder material to form a lump material,
The mass material group is conveyed by compressed air, or water is added to an aggregate having a water content and a water absorption of 10% or less to wet the entire surface of the aggregate, and then cement is added. In addition, forming a massive spray material in which the surface of each aggregate is coated with cement, introducing the massive spray material group into a spray device, and transporting the compressed spray group by compressed air through a transport pipeline. Features or has a water content and water absorption of 1
Water is added to the aggregate of 0% or less to wet the entire surface of the aggregate, and then cement is added to form a massive spray material in which the surface of each aggregate is covered with the cement. The spraying material group is put into the spraying device and is conveyed through the conveying pipe, and the flow velocity is 6 to 15 m from the spraying tip nozzle.
/ Sec, spraying and spraying the spraying material group, or adding water to an aggregate having a water content and a water absorption of 10% or less to wet the entire surface of the aggregate, and then adding cement. To form a massive spray material in which the surface of each aggregate is covered with cement, and the massive spray material group is charged into the spraying device and transported through a transport pipe line, and the spray from the spraying tip nozzle The flow rate of the sprayed material to be ejected is detected, and the pressure of the compressed air to be injected into the conveying line is adjusted in the range of 0.3 to 2.0 kg / cm ² so that the flow rate becomes 6 to 15 m / sec. It is characterized by doing
Or, the water content and water absorption of 100 to 500 parts by weight are 1
10% to 60 parts by weight of water is added to 0% or less of the aggregate to wet the entire surface of the aggregate, and then 50 to 300 parts by weight of cement is added, and the surface of each aggregate is coated with cement. Forming a massive spray material, and feeding the massive spray material group into a spray device and transporting the same through a transport pipeline;
Compressed air is injected into the conveying pipe so that the spraying material group can be sprayed at a flow rate of 6 to 15 m / sec from a spraying tip nozzle, and the water content and the water absorption are 10% or less. Water is added to the aggregate to wet the entire surface of the aggregate, and then cement and titanium oxide are added to form a massive spray material in which the surface of each aggregate is coated with cement and titanium oxide. Is injected into the spraying device and conveyed through a conveying line, and the spraying material group is sprayed at a flow rate of 6 to 15 m / sec from the spraying tip nozzle so that the compressed air can be sprayed into the conveying line. Or the aggregate having a water content of 100 to 500 parts by weight and a water absorption of 10% or less is 10 to 6 parts by weight.
After adding 0 parts by weight of water to wet the entire surface of the aggregate, 50 to 300 parts by weight of cement is added to form a massive spray material in which the surface of each aggregate is covered with cement. The mass of the material to be sprayed is put into the spraying apparatus and is conveyed through a conveying pipe.
A pressure of 0.3 to 2.0 kg / m in the conveying pipe so that the spray material group can be sprayed and fired at a pressure of 15 to 15 m / sec.
cm ² of compressed air is injected.

According to the present invention, the surface of a solid material such as aggregate wetted with a liquid such as water is wrapped with a powder material such as cement and coated to form a cemented material in a wet state with a cement layer. The block of material is conveyed by compressed air through a conveying pipe such as a hose.

[0014] This makes it possible to prevent the clogging of the conveying line which occurs when the solid material, the powder material, and the liquid are conveyed in a semi-fluid state by air, and to apply an extra conveying pressure to the material. It is also possible to avoid adding.

Further, in the case of spraying a sound-absorbing material, for example, water is added to the material conveyed to the tip nozzle of the conveying pipe by the above-mentioned method. I do.

[0016] This makes it possible to perform spraying without generating dust due to the dry powder, and it is possible to use the blown sound-absorbing material to obtain a very ideal porous molded body.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a method for spraying a finishing spray material and a method for conveying a material in a spraying apparatus according to the present invention will be described below with reference to the drawings.

First, as shown in the upper right part of FIG. 2, in this embodiment, an aggregate 10 as a solid material is mixed with a mixer 2.
0 and the like, and water 12 as a wetting liquid is added thereto and mixed.

Here, as the aggregate 10 used in the present embodiment, natural aggregates such as pearlite, carbon hollow spheres, plastic balloons, glass balloons, silica balloons, shirasu balloons and the like, which are lightweight and aggregated, can be used. And artificial aggregate 10.

The aggregate 10 used has a water content and a water absorption of 10% or less. In particular, it is preferable that these aggregates 10 are lightweight aggregates satisfying the conditions such as having a surface layer that does not allow water 12 to pass through and having the necessary strength for spraying.

Further, the amount of the aggregate 10 is 100 to 50.
0 parts by weight.

This is because the surface of the aggregate 10 is moistened with the water 12 and coated with the cement 14 to obtain a lump-shaped material so as to balance the amounts of the cement 14 and the water 12 to be added. If the amount is less than 100 parts by weight, a desired sound absorbing effect cannot be obtained, and if it exceeds 500 parts by weight, spraying workability may be deteriorated, and for example, a coating film obtained by spraying may be brittle.

Examples of the lightweight aggregate 10 having the above-mentioned characteristics include so-called high-strength inorganic expanded particles. The inorganic foamed particles are lightweight, high-strength, lightweight aggregates whose surfaces are covered with a porcelain skin layer, and have extremely high sound absorbing performance.

The water 12 is necessary for controlling the state of the bonding of the powder material to the solid material. In addition, the water 12 is used in the method of spraying the spray material 16 and the method of transporting the material in the spray device according to the present embodiment. Water 12 is converted into cement 14 by a hydration reaction.
It is also essential for coagulating and hardening.

That is, in this embodiment, the water 12 wets the spray material 16 before the material is transported, and when the spray material 16 is sprayed (supplied to the spray nozzle 28 after the transport).
Are supplied in two stages.

More specifically, 10 to 60 parts by weight of water 12 is supplied to the material in the wetting process of the spray material 16 before the material is transported, and 30 to 30 parts by weight of the spray material 16 is sprayed.
100 parts by weight of water 12 will be supplied to the material.

The amount of water 12 supplied in the wet process is 10 to 60 parts by weight. If the amount is less than 10 parts by weight, the cement 14 does not sufficiently adhere to the surface of the aggregate 10, This is because if the number of the aggregates is more than the part, the individual aggregate 10 does not become a massive material covered with the cement 14 but becomes a semi-fluid material as a whole.

As described above, the water 12 permeates into the surface of the aggregate 10 as shown in the middle left part of FIG. 12 is almost completely sucked on the surface of the aggregate 10.

Then, after this state is obtained, as shown in the middle part of FIG. 1 and FIG. 2, the cement 14 is charged into the mixer 20 and mixed. Here, the type of the cement 14 to be charged is not particularly limited, and conventionally known ordinary Portland cement, early-strength Portland cement, moderate heat Portland cement, sulfate-resistant Portland cement, white Portland cement,
Mixed Portland cement and the like can be used.

The amount of the cement 14 is from 50 to 3
00 parts by weight is essential. This is to balance the input amount with the aggregate 10 and the water 12 in order to obtain the massive spray material 16 as described above, and if the amount is less than 50 parts by weight, sufficient strength cannot be imparted to the sound absorbing material. If the amount exceeds 300 parts by weight, the sound absorbing effect may be reduced.

At this time (ie, at the time of cement input),
Various additives (admixtures, water reducing agents, fiber reinforcing agents, etc.) can also be added as necessary. The amounts of these components are appropriately determined.

The various additives that can be used in this embodiment will be described later in detail.

By the above process, as shown in the lower left part of FIG. 1, the aggregate 10 becomes a nucleus, the entire surface of which is covered with the cement 14 via the moisture 12, and the massive spray material 16 is formed. The Rukoto.

That is, the water 12 permeating the surface of the aggregate 10
Functions as an adhesive for bonding the cement 14, and the entire surface of the aggregate 10 is covered with the cement 14.

Here, the layer of the cement 14 covering the aggregate 10 contains a large amount of water 12 and is in a wet state as a whole.

Therefore, as shown in the lower part of FIG. 2, when the massive blowing material 16 is charged into the air conveying device 22 in the spraying device, and the air is conveyed through the conveying pipe 26 such as a hose. However, unlike the conventional wet transport method, it is possible to prevent the cement layer and the aggregate from separating,
In addition, material adhesion to the inner surface of the transfer conduit 26 can be avoided.

Therefore, there is no possibility that the conveying pipe 26 is blocked by the viscous semi-fluid, so that the conveying distance can be long.

Then, the spray material 16 is transferred to the conveying pipe 2.
6 and is conveyed by the compressed air to the tip of a nozzle 28 arranged to spray the spray material 16 to a desired construction site.

In this embodiment, the compressed air for conveying the material is compressed and formed by the air compressor 24.

Here, in the air transfer device 22, the pressure of the transfer air sent from the air compressor 24 to the transfer line 26 (pneumatic pressure) is set to a value within 0.3 to 2.0 kg / cm ² . Has been adjusted.

This is because the compressed air pressure is 0.3 kg / cm ²
If the air pressure is less than 2.0 kg / cm ² , the coated cement 14 separates from the coating layer of the massive spray material 16 to be conveyed. This is because there is a danger that they will be lost.

If the compressed air pressure of the compressed air is as described above,
The flow rate at which the spray material 16 is sprayed and emitted from the nozzle 28 can be set to 6 to 15 m / sec, which is favorable for spraying work.

Then, the compressed air pressure is applied to the spray material 1.
By changing the transfer distance, the transfer height, the transfer amount, and the diameter of the transfer conduit 26 within the above-described range, the flow rate at which the spray material 16 is sprayed from the nozzle 28 under any transfer conditions is emitted. 6 to 1 good for spraying construction
It can be controlled to 5 m / sec.

Here, as understood from FIG. 1, the flow rate of the spray material 16 emitted from the nozzle 28 is detected by the flow rate sensor 36, and this flow rate is in a range of 6 to 15 m / sec, which is good for spraying work. Can be within.

That is, the flow rate detected by the flow rate sensor 36 is fed back to the pressure adjusting device 38, and the pressure adjusting air pressure is adjusted by the pressure adjusting device 38 in accordance with the detected flow rate.

Therefore, for example, when the detected flow velocity is lower than a value in the range of 6 to 15 m / sec, the pressure adjusting device 38 adjusts the sending air pressure so that the flow velocity becomes faster.

The configuration of the flow rate sensor 38 is not limited at all, but an optical sensor is generally used. Further, the configuration of the pressure adjusting device 38 is not limited at all, and may be configured by an air adjusting valve or the like.

Here, in the conventional wet transfer method,
In order to prevent the semi-fluid carrier material from adhering to the inner surface of the conveying line 26 and to prevent the conveying line 26 from being closed, the pressure of the pneumatic air is 2.0
Often it had to be set higher than kg / cm ² .

However, for this purpose, the flow rate at which the spray material 16 is sprayed and emitted from the nozzle 28 is 6 to 15 m / sec.
c, and the rebound rate of the sprayed material (the rate at which the material sprayed from the object to be sprayed such as a soundproof wall at the time of spraying rebounds) is about 30%.

However, according to the conveying method of the present invention, the pressure air pressure is 2.0 kg / cm ² or less, and the flow rate at which the blowing material 16 is sprayed and emitted from the nozzle 28 can be within 6 to 15 m / sec. Can be reduced to about 10%.

Here, the massive spray material 16 transported to the nozzle 28 at the tip of the transport pipe 26 such as a hose,
8 and is sprayed into the air and sprayed onto the spraying surface 34 at a desired construction site such as a soundproof wall.

Further, at the time of the spraying, 30 to 30
100 parts by weight of water 12 is conveyed from the water pump 30 and is additionally supplied to the spray material 16.

As described above, the water 12 is indispensable for setting and hardening the cement 14 by a hydration reaction, and its final blending amount (blending amount immediately after spraying).
Is 50 to 130 parts by weight.

If the amount is less than 50 parts by weight, the hardening of the cement 14 may be insufficient. If the amount is more than 130 parts by weight, not only the time is required for the hardening but also the coating film after the spraying operation is performed. This is because there is a possibility that fluidity may be generated in the resin and it may not be uniformly cured.

In this embodiment, a two-head type nozzle having two nozzles, ie, a sound absorbing material injection nozzle and an additional water injection nozzle, may be used.

Thus, it is possible to easily form a sound absorbing material for finishing in an ideal porous state, which is difficult with the conventional method.

That is, at the time of spraying, each material is uniformly dispersed and mixed in a well-balanced manner, so that it is possible to obtain a semi-fluid material in an ideal mixed state.
It is possible to form an ideal sound absorbing material that is uniformly porous.

Further, in the conveying method and the spraying method according to the present invention, the dried aggregate 10 and the cement 14 are not sprayed from the nozzle 28 unlike the conventional dry conveying method. No dust is generated at the time of spraying, and there is no need to worry about a decrease in work efficiency due to the dust.

Therefore, according to the method of the present invention, it is possible to obtain higher construction efficiency (yield) as compared with the conventional transport methods and spraying construction methods.

Further, since the sound absorbing material formed by the method of the present invention is in a very porous state, it has sufficient sound absorbing characteristics over a wide frequency band, and has a sound in a certain frequency band as in the conventional method. Concerns about the possibility that the sound absorption coefficient may drop due to (noise) are also eliminated.

In some cases, curing may be performed in advance by a masking operation as needed. After the spraying is completed, it solidifies and hardens in about 20 to 30 hours, depending on the application conditions.
When a quick setting agent is used in combination, quick setting takes several minutes to several tens of minutes.

Since the sound absorbing layer obtained by using the quick-setting agent in combination has a good porous structure, a good sound absorbing effect can be obtained as compared with the case where no combination is used.

The above-described aggregate 10, cement 14, water 12, and various additives (powder material or liquid) are examples of solid material, powder material, and liquid used in the method of the present invention. The present invention is a technical idea characterized in that the surface of a wet solid material is coated with a powder material to form a lump material, which is conveyed by compressed air.

Therefore, the materials used in the method of the present invention are not limited to these specific examples.

For example, retort food production process, production of base-like confectionery, asphalt (asphalt concrete) for road construction, human waste, in which a solid material and a powder material are pressure-fed as a semi-fluid material by a conveying pipe. The present invention is also applicable to the process of transporting materials such as processing and sealing agents.

Next, various additives (titanium 15, admixture, water reducing agent, thickener,
(Foaming agent, quick-setting agent, etc.) will be described.

In this embodiment, for example, in order to add an effect of absorbing NOx (nitrogen oxide), for example, titanium dioxide 15 of titanium dioxide having an anatase type crystal structure is used. Here, titanium dioxide has anatase type and rutile type depending on its crystal structure. The rutile type has a relatively stable crystal structure, and is generally used as a white color pigment. On the other hand, the anatase type has an unstable crystal structure which shifts to the rutile type when heated, but has been recently found to have a photocatalytic action.

That is, anatase type titanium dioxide is
It is considered that active oxygen is generated on the surface by receiving the light, and the active oxygen is combined with and absorbed by NOx (nitrogen oxide) in the air to exhibit an air purifying action.

The anatase type titanium dioxide needs to contain 2 to 100 parts by weight. NO if less than 2 parts by weight
The x (nitrogen oxide) absorption effect is not sufficient, and even if it is added in excess of 100 parts by weight, an air purification effect in proportion to the amount is not obtained, which is rather disadvantageous in cost.

The above-mentioned aggregate 10 is preferably coated with titanium dioxide before use.
It has been confirmed that when a lightweight aggregate is coated with a titanium dioxide coating, it has a higher NOx removing effect than a conventional spray-type sound absorbing material.

The titanium dioxide to be coated on the lightweight aggregate may be titanium dioxide directly added to the liquid material for the spray type sound absorbing material.

Further, an organic admixture can be used as a part of the admixture in the spray type sound absorbing material. Examples of the organic admixture include resin emulsions such as an all-acryl resin, an acryl-styrene copolymer resin, and a styrene-butadiene copolymer resin. Particularly preferably, an acrylic resin emulsion having a polar group such as a carboxyl group at the terminal is recommended. Other admixtures to be blended as needed, gypsum suitable for controlling the setting,
Various fillers for reinforcing the sound absorbing material, for example, synthetic fibers and glass fibers such as polyester, polyethylene, vinylon, rayon, and nylon, inorganic fibers such as rock wool, and various pigments such as silica sand, barium sulfate, calcium carbonate, and clay And flaky fillers such as mica. Further, various additives such as a water reducing agent and a thickening agent for ensuring and improving the workability of the spray type sound absorbing material and the performance after curing can be blended as required. The amounts of these components are appropriately determined.

Further, a foaming agent may be added for the purpose of facilitating the spraying operation and improving the sound absorbing performance. In general, the foaming agent can be appropriately selected and used from an anionic surfactant, an animal protein and the like. N-acyl amino acids and salts thereof, carboxylate such as alkyl ether carboxylic acid, acylated peptide, sulfonate such as alkyl benzene sulfonate, alkyl naphthalene sulfonate, sulfate ester salt, phosphate ester salt, glue etc. Can be illustrated. The method of adding the foaming agent is (1) a method of diluting the foaming agent to an appropriate concentration and directly adding it at the time of kneading the spray type sound absorbing material, and (2) a method of passing the foaming agent through a foaming device to generate air bubbles. A method of mixing the air bubbles with the spray type sound absorbing material after mixing and mixing can be exemplified.

In any method, the volume ratio of bubbles in the sound absorbing material before spraying is adjusted to be 20 to 80%. If the amount of air bubbles is less than 20%, the sound absorbing effect cannot be improved, and if it exceeds 80%, the strength of the sound absorbing material may be reduced and durability may be reduced.

Further, after the spraying, the air bubbles may disappear with the hardening of the cement, but voids remain in the sound absorbing material sprayed after the disappearance. The porosity in this sound absorbing material is 10
Preferably, it is 50%. If it is less than 10%, no improvement in the sound absorbing effect can be obtained, and if it exceeds 50%, the strength of the sound absorbing material may be reduced and the durability may be reduced.

When the spraying type sound-absorbing material is applied to the upper surface such as the inner surface of a tunnel, etc., there is a possibility that problems such as dripping or rebound may occur due to its own weight after the spraying. There is also a case where short-time condensation, so-called quick setting, is required depending on the environment and construction conditions at the construction site. In such a case, a quick-setting agent can be used in combination with the spraying method. As a quick setting agent, calcium aluminates such as calcium chloride, aluminum hydroxide, sodium carbonate, sodium hydroxide, calcined alunite,
Inorganic substances such as water glass can be exemplified. Some organic substances, such as triethanolamine and glycerin, can also be used as quick-setting agents. It is preferable that the quick-setting agent is sprayed in the same direction from a similar nozzle in a state immediately after the sound-absorbing material is sprayed from the spray nozzle, and is mixed in the air in a time period from the nozzle to the sound-absorbing material application surface. In addition, a three-head type nozzle having three, that is, a so-called sound-absorbing material injection nozzle, a water injection nozzle, and a quick-setting agent injection nozzle can be exemplified.

As described above, according to the material conveying method and the like according to the present invention, for example, according to the method of spraying a finishing spray material and the method of conveying the material in the spraying apparatus, the state of the material before the conveying is controlled to a constant state. In order to improve the workability such as spraying work after transfer, and to improve the molding state (porous state) of the sound absorbing material etc. after the transfer spraying to improve the sound absorption coefficient etc. , Becomes possible.

[Brief description of the drawings]

FIG. 1 is a conceptual explanatory diagram of the present invention.

FIG. 2 is an explanatory diagram of an embodiment of the present invention.

FIG. 3 is an explanatory diagram of a conventional technique (dry transport method).

FIG. 4 is an explanatory view of a conventional technique (wet transfer method).

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Aggregate 12 Water 14 Cement 15 Titanium 16 Spraying material 20 Mixer 22 Air transporter 24 Air compressor 26 Transport pipeline 28 Nozzle 30 Water pump 34 Spray surface 36 Flow rate sensor 38 Pressure regulator

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Yoshiyuki Seta No. 2, Sanbancho, Chiyoda-ku, Tokyo Tobishima Construction Co., Ltd. (72) Inventor Michihiko Yoshimura No. 2 Sanbancho, Chiyoda-ku, Tokyo Tobishima Construction Co., Ltd. In-house (72) Inventor Sai Tanaka 2nd Sanbancho, Chiyoda-ku, Tokyo Tobishima Construction Co., Ltd. (72) Inventor Osamu Makijima 2nd Sanbancho, Chiyoda-ku, Tokyo Tobishima Construction Co., Ltd. (72) Invention Person Jun Ito 2 Sanbancho, Chiyoda-ku, Tokyo Inside Tobishima Construction Co., Ltd. (72) Inventor Hideo Fujii 8-16-15 Toshima, Kita-ku, Tokyo Inside Japan Special Paint Co., Ltd. (72) Inventor Takashi Terada Tokyo 8-16-15 Toshima, Tohoku-ku, Japan F Co., Ltd. F-term (reference) 2E172 AA03 CA37 DC01 DC12 3F047 AA11 AB06 BA07 4F033 BA04 BA05 QB02Y QB06 QB12Y QD02 QD13 QD16 QE01 QE21 QE26 QF07Y QF15X QF15Y QF23 QH02 QH10 QK04Y QK08Y QK11Y QK18Y QK22Y QK27Y

Claims (7)

[Claims] (1) after the surface of a solid material is wetted with a liquid, the surface of the wet solid material is coated with a powder material to form a lump material, and the lump material group is conveyed by compressed air. A method for transporting a solid material and a powder material. 2. Water is added to an aggregate having a water content and a water absorption of 10% or less, and the entire surface of the aggregate is wetted, and then cement is added. The surface of each aggregate is covered with cement. A method of conveying a mass of a sprayed material in a spraying device, comprising: forming a mass of a material to be sprayed; introducing the group of masses of the material to be sprayed into the spraying device; and conveying the material by compressed air through a conveying pipe. 3. An aggregate having a water content and a water absorption of 10% or less is added with water to wet the entire surface of the aggregate, and then cement is added, and the surface of each aggregate is coated with cement. A massive spray material is formed, and the massive spray material group is introduced into the spraying device and transported through a conveying pipe. The spray material group is sprayed from the spray tip nozzle at a flow rate of 6 to 15 m / sec. A spraying method of spraying material, characterized by firing. 4. An aggregate having a water content and a water absorption of 10% or less is added with water to wet the entire surface of the aggregate, and then cement is added, and the surface of each aggregate is coated with the cement. A massive spray material is formed, and the massive spray material group is charged into the spray device and transported through a transport pipe, and the flow rate of the spray material emitted from the spray tip nozzle is detected, and the flow rate is detected. Is 6 to 15
A method for spraying a spray material, wherein the pressure of the compressed air to be injected into the conveying conduit is adjusted within a range of 0.3 to 2.0 kg / cm ² so as to be m / sec. 5. An aggregate having a water content of 100 to 500 parts by weight and a water absorption of 10% or less is added with 10 to 60 parts by weight of water to wet the entire surface of the aggregate and then 50 to 300 parts by weight. The cement of the part is added to form a massive spray material in which the surface of each aggregate is covered with the cement, and the massive spray material group is charged into the spraying device and transported through a transport pipe, and sprayed. Spraying the sprayed material group at a flow rate of 6 to 15 m / sec from a front end nozzle, and injecting compressed air into the conveying pipe so as to be able to emit the sprayed material group. 6. An aggregate having a water content and a water absorption of 10% or less is added with water to wet the entire surface of the aggregate, and then cement and titanium oxide are added to make the surface of each aggregate cement and oxidized. A massive spray material coated with titanium is formed, and the massive spray material group is put into a spray device and transported through a transport pipe, and a flow velocity of 6 to 15 m from a spray tip nozzle.
A spraying method of spraying material, wherein compressed air is injected into the conveying pipe so that the spraying material group can be sprayed and fired at / sec. 7. An aggregate having a water content of 100 to 500 parts by weight and a water absorption of 10% or less is added with 10 to 60 parts by weight of water to wet the entire surface of the aggregate and then 50 to 300 parts by weight. The cement of the part is added to form a massive spray material in which the surface of each aggregate is covered with the cement, and the massive spray material group is charged into the spraying device and transported through a transport pipe, and sprayed. A pressure of 0.3 to 2.0 kg / cm in the conveying pipe so that the sprayed material group can be sprayed and fired at a flow rate of 6 to 15 m / sec from the tip nozzle.
^2. A spraying method for spraying material, wherein compressed air is injected into the spraying material.