JP5035889B2 - Japanese-Western refurbishment method for toilets and high-strength composite concrete board - Google Patents

Description

  The present invention relates to a Japanese-Western refurbishment method of a toilet for refurbishing a toilet room in which a Japanese-style toilet is installed into a toilet room in which a Western-style toilet is installed. The present invention relates to a Japanese-Western refurbishment method for toilets and high-strength composite concrete boards.

In a Japanese-style toilet room such as an office building, an opening for installing a Japanese-style toilet is provided in a concrete floor slab, and the Japanese-style toilet is installed so as to be fitted into the opening from above. A drainage pipe routed under the slab is connected to the drainage port of the Japanese-style toilet.
When refurbishing such a Japanese-style toilet room into a Western-style toilet room with a Western-style toilet, all the Japanese-style toilets are chopped down, the defecation pipe is rebuilt, reinforcing bars are placed in the slab openings, and the floor is built with concrete. After that, Western-style toilets have been installed. However, this construction method requires work from the downstairs because of the fall of the Japanese-style toilet demolition garments down the floor and the movement of the defecation pipe, resulting in a longer construction period and higher costs.

As a construction method that can be repaired only from the upper floor, Japanese Patent Application Laid-Open No. 2005-228867 discloses that the upper part of the Japanese-style toilet installed on the floor of the toilet room is removed and the drain pipe is connected to the drain of the Japanese-style toilet. Is described, and the Japanese-style toilet bowl is filled with a self-hardening filler such as fast-setting mortar, and then a Western-style toilet bowl is installed thereon.
Further, in Patent Document 1, after removing the upper part of a Japanese-style toilet bowl installed on the floor of a toilet room, a glass fiber mat is stuck from the inner surface of the Japanese-style toilet bowl to the surrounding floor surface. It is described that a plate is installed so as to cross the wall, and a Western-style toilet is installed thereon.
JP 2005-256467 A

In Patent Document 1, mortar is used as the self-hardening material, but it is necessary to finish the mortar densely so that the mortar penetrates and water does not enter the Japanese-style toilet.
Also, the Japanese-style toilet becomes heavier by the weight of the mortar.
The present invention eliminates the upper part of the Japanese-style toilet and forms a new floor surface, and in the Japanese-Western refurbishment method for installing a Western-style toilet on it, it is unnecessary to fill the Japanese-style toilet with mortar, It is an object of the present invention to provide a Japanese-Western refurbishment method for a toilet that is sufficiently prevented from penetrating water into a Japanese-style toilet and that can be easily constructed.

  The present invention also provides a high-strength composite concrete board suitable for covering a top surface of a Japanese-style toilet and serving as a new flooring in a Japanese-Western refurbishment method of a toilet that does not require mortar filling, or a Japanese-style toilet It aims at providing the high intensity | strength composite concrete board suitable not only for the use which covers an upper surface but for the use to the part which requires high intensity | strength.

  The method of refurbishing Japanese toilets according to claim 1 includes a step of removing at least a front concealed portion at an upper portion of the Japanese-style toilet, a step of raising a drain pipe so as to communicate with a drain outlet of the Japanese-style toilet, and the Japanese-style toilet A step of fitting a lid material into the upper part of the toilet; and a high strength obtained by attaching a metal plate to at least one side of the concrete plate so as to cover the upper side of the lid material and the Japanese style toilet and the floor around the Japanese style toilet It has the process of installing a composite concrete board, the process of supplying a self-hardening material on a floor, and the process of installing the said Western style toilet bowl after that.

According to a second aspect of the present invention, there is provided a toilet / Japanese / Western refurbishment method according to the first aspect, wherein the concrete plate having a metal plate attached to at least one side is made of a fiber-reinforced concrete plate containing fibers.
The toilet / Japanese refurbishment method for a toilet according to claim 3 is the method according to claim 2, wherein the fiber-reinforced concrete board is cement, fine pozzolanic powder having an average particle size of 1.0 μm or less, fine aggregate having a maximum particle size of 2 mm or less, metal fiber Or it consists of a compound containing organic fiber, quartz powder having an average particle size of 3 to 20 μm, fibrous particles or flaky particles having an average particle size of 1 mm or less, a water reducing agent and water.

The high-strength composite concrete board according to claim 4 is used in the Japanese / Western refurbishment method of the toilet according to claim 1, and is a high-strength composite concrete board formed by attaching a metal plate to at least one surface of the concrete board. It is characterized by.
The high-strength composite concrete plate according to claim 5 is characterized in that, in claim 4, the concrete plate having a metal plate attached to at least one side is made of a fiber-reinforced concrete plate containing fibers.
The high-strength composite concrete board according to claim 6 is the high-strength composite concrete board according to claim 5, wherein the fiber-reinforced concrete board is cement, pozzolanic fine powder having an average particle diameter of 1.0 μm or less, fine aggregate having a maximum particle diameter of 2 mm or less, metal fiber Or it consists of a compound containing organic fiber, quartz powder having an average particle size of 3 to 20 μm, fibrous particles or flaky particles having an average particle size of 1 mm or less, a water reducing agent and water.

  In the Japanese-Western refurbishment method of the toilet of the present invention, a lid material is fitted into the upper part of a Japanese-style toilet, a high-strength composite concrete plate is placed on the upper side of the lid material, and the floor around the high-strength composite concrete plate is self-hardening Supply material. Therefore, since the Japanese-style toilet is not filled with a filling material such as mortar, the Japanese-style toilet is not heavy and the load on the floor slab supporting the Japanese-style toilet can be reduced. Moreover, the high-strength composite concrete board which covers a Japanese style toilet bowl constitutes a part of a new floor surface. On this new floor, during the renovation work, an operator rides, or a person who uses the toilet after the renovation is done in Western style, but the Japanese-style toilet that is not filled with mortar is hollow So, the new floor will support the weight of the person on it. Such a new floor surface is composed of a high-strength composite concrete plate with a metal plate attached to at least one side of the concrete plate, so it is resistant to compression, tension and bending, and bends and fluffs when a person gets on it. There is no risk of damage due to bending force.

  As described above, the high-strength composite concrete plate of the present invention is formed by attaching a metal plate to at least one surface of a concrete plate. A concrete board hardly bends and is very strong in strength, but weak against bending. In the high-strength composite concrete plate of the present invention, the metal plate is attached to at least one surface, so that it has high strength against bending. For this reason, it can be used in a wide range such as use as a flooring material or wall material or application to other parts requiring high strength.

  In the high-strength composite concrete board of the present invention, the concrete board can contain fibers. As the fiber, a high-strength, high-modulus fiber such as steel fiber or carbon fiber can be used. A high-strength composite concrete plate in which a metal plate is attached to a concrete plate reinforced with this fiber is further excellent in bending resistance, so that the thickness is thin and yet a high-strength plate material can be obtained.

  As a concrete board containing the above fibers, cement, pozzolanic fine powder having an average particle size of 1.0 μm or less, fine aggregate having a maximum particle size of 2 mm or less, metal fiber or organic fiber, average particle size of 3 to 20 μm It can be composed of a blend containing quartz powder, fibrous particles or flaky particles having an average particle size of 1 mm or less, a water reducing agent and water.

Hereinafter, the present invention will be specifically described with reference to embodiments.
[First Embodiment]
1 to 10 show a first embodiment. Among them, FIGS. 1 to 4 (a) and FIGS. 5 to 7 are longitudinal sectional views showing a toilet refurbishment procedure according to the Japanese / Western refurbishment method according to the first embodiment, and FIG. 4 (b) is a Japanese-style toilet. It is a top view which shows arrangement | positioning of the sheet | seat for fall and scattering prevention. FIG. 8 is a perspective view of the toilet floor before installing the Western-style toilet, FIG. 9A is a longitudinal sectional view after installing the Western-style toilet, FIG. 9B is an enlarged view of the vicinity of B in FIG. FIG. 3 is an enlarged sectional view of a flooring.

As shown in FIG. 1, a Japanese-style toilet bowl opening 2 is provided on a floor 1 of a toilet room, and a ceramic-style Japanese toilet bowl 10 is installed in the opening 2 so as to be fitted from above. In this embodiment, the floor 1 includes a concrete floor slab body and a finishing layer made of mortar, tile, or the like formed on the upper surface of the floor slab body.
The Japanese-style toilet 10 includes a toilet bowl 12, a front concealment portion (gold concealment portion) 13 erected from the front portion of the toilet bowl 12, a drain trap 15 provided in the front portion of the toilet bowl 12, and a lower portion of the toilet bowl 12. And having a drain port 11 connected to the drain trap 15. As shown in the figure, a defecation pipe 3 is disposed in the lower space of the floor 1, and the defecation pipe 3 is connected to the drainage port 11 of the Japanese-style toilet 10. In addition, a water supply pipe 14 for supplying water from a water supply tank (not shown) to the toilet bowl 12 is connected to the Japanese style toilet 10,

Below, the construction procedure for refurbishing this Japanese-style toilet into a Western-style toilet will be described.
First, as shown in FIGS. 1 and 2, only the front concealment portion 13 of the Japanese-style toilet 10 is excised using a diamond cutter or the like. The upper edge other than the front concealment 13 of the Japanese-style toilet 10 is left without being removed.
Next, as shown in FIG. 3, a portion of the bottom of the toilet bowl 12 positioned above the drain outlet 11 is excised with a diamond cutter or the like to open the opening 12 a, and the drain outlet 11 is exposed above the toilet bowl 12. Like that. Further, the accumulated water in the drain trap 15 is removed.
Next, as shown in FIG. 4 (a), the Japanese-style toilet 10 is dropped on the exposed surface (the inner surface of the toilet bowl 12, the drain trap 15, etc., and the upper edge of the toilet bowl 12). And the sheet | seat 20 for scattering prevention is affixed.

In this embodiment, the falling and scattering prevention sheet 20 is a self-adhesive sheet obtained by adhering or impregnating an adhesive material such as butyl rubber or rubberized asphalt compound on one side of a nonwoven fabric. However, the material and configuration of the self-adhesive sheet used as the fall and scatter preventing sheet 20 in the present invention are not limited thereto, and various other self-adhesive sheets may be used as the fall and scatter preventive sheet 20. Can be used as

In this embodiment, as shown in FIG. 4B, the falling and scattering prevention sheet 20 is a belt-like shape, and a plurality of falling and scattering prevention sheets 20 are arranged in a plurality of directions in the vertical and horizontal directions. It is pasted to cross.
It should be noted that, when the sheet 20 for preventing dropping and scattering is attached, it is desirable that the sheet 20 for preventing falling and scattering adheres to the entire surface of the Japanese-style toilet 10, but the sheet for preventing falling and scattering is partially applied. There may be a portion where 20 is not attached.

When the anti-scattering sheet 20 is affixed over the entire surface of the Japanese-style toilet 10, a lid member 22 (see FIG. 5) to be fitted into the upper portion of the Japanese-style toilet 10, which will be described later, and the falling and anti-scattering sheet 20 Also functions as a waterproof sheet, and the floor is highly waterproof.
After the dropping and scattering prevention sheet 20 is attached, the drain pipe 21 is raised so as to communicate with the drain port 11 as shown in FIG. Specifically, the lower end side of the drain pipe 21 is inserted into the drain port 11 from above. A gasket 21 a is attached to the lower end of the drain pipe 21.

The upper end side of the drain pipe 21 protrudes upward from the upper surface of the Japanese-style toilet 10.
Next, a lid 22 is attached to the upper part of the Japanese-style toilet 10. As the lid member 22, a foamed synthetic resin plate such as foamed polystyrene is suitable because it has good heat insulation and cutting properties and can be easily fitted into the upper part of the Japanese-style toilet bowl 10.
In order to mount the lid member 22, the original plate of the lid member is cut according to the opening shape of the upper surface of the Japanese-style toilet 10. Further, a hole 22 a for inserting the drain pipe 21 is formed in a portion of the lid member 22 that overlaps the drain pipe 21. Then, the lid member 22 is fitted into the Japanese-style toilet 10 while the drainage pipe 21 is inserted into the hole 22a. At this time, the sealing material 22b is filled between the side peripheral surface of the lid member 22 and the inner peripheral surface of the Japanese-style toilet 10, and between the opening and the drainage pipe 21 (FIG. 5B).
As shown in FIG. 5, the lid member 22 is preferably fitted into the Japanese-style toilet 10 so that the upper surface thereof is substantially flush with the upper surface of the Japanese-style toilet 10. A plurality of lid members 22 may be fitted so as to face each other in the Japanese-style toilet 10.

Next, as shown in FIG. 6, a high-strength composite concrete plate 23 is placed so as to cover the upper side of the lid member 22 and the floor 1 around the Japanese-style toilet 10. As shown in FIG. 10, the high-strength composite concrete plate 23 is composed of a composite plate in which a metal plate 23b is attached to one side of the concrete plate 23a (the lower surface in FIG. 10) by adhesion. The high-strength composite concrete plate 23 is also formed with a hole 23d similar to the lid member 22.
The concrete plate 23a may be a concrete plate made of ordinary cement concrete, or a concrete plate in which fine reinforcing bars are embedded in ordinary cement concrete.

  Furthermore, the concrete plate 23a may be composed of a fiber reinforced concrete plate mixed with reinforcing fibers. This fiber reinforced concrete board is comprised from the fine aggregates, such as cement as a base material and quartz sand, a reinforcing fiber, etc., for example. The reinforcing fiber is preferably a high-strength, high-modulus fiber such as a synthetic resin fiber or a metal fiber such as steel, particularly a special steel fiber such as stainless steel or a carbon fiber. The concrete plate 23a containing such reinforcing fibers is superior in compressive strength, tensile strength, and bending strength compared to ordinary concrete, and in particular, has a strength about 10 times that of ordinary concrete in terms of bending strength. . In addition, there exists what is called a ductal (DUCTAL: registered trademark) as a kind of fiber reinforced concrete which mixed this reinforcement fiber.

  Various metal plates such as a steel plate and an aluminum plate are conceivable as the metal plate 23b, but a stainless steel plate is preferable from the viewpoint of strength and aesthetics. An epoxy adhesive or the like is used as an adhesive for bonding the metal plate 23b to the concrete plate 23a. In FIG. 10, an adhesive for bonding the concrete plate 23a and the metal plate 23b is indicated by reference numeral 23c.

  Even though the concrete plate 23a is made of ordinary cement concrete, the high-strength composite concrete plate 23 has the metal plate 23b attached to one side. In addition to compression resistance, it also has excellent bending resistance, which has been considered a weak point of concrete. The concrete plate 23a is suitable as a flooring material because the concrete plate originally has the property that it is difficult to bend. However, in this embodiment, the metal plate 23b is attached to one side, so that it has excellent bending resistance even if it is thin. Therefore, it is lightweight and easy to carry and handle. Further, by using a fiber reinforced concrete plate in which reinforcing fibers are mixed into the concrete plate 23a, the concrete plate 23a can be made thinner and higher in strength.

  In the present embodiment, a fiber reinforced concrete plate is used as the concrete plate 23a, and a stainless plate is used as the metal plate 23b. Such a high-strength composite concrete plate 23 is placed on the Japanese-style toilet 10 with the metal plate 23b facing down as described above so that the metal plate 23b bears the bending force (tensile force).

Here, the constituent materials of the blend for forming the fiber reinforced concrete board used in the present embodiment and the blending ratio thereof will be described. In addition, the following structural materials and the compounding ratios thereof are those of the above-mentioned compound called DUCTAL (registered trademark).
The compound used for forming the fiber reinforced concrete board is cement, fine pozzolanic powder having an average particle size of 1.0 μm or less, fine aggregate having a maximum particle size of 2 mm or less, metal fiber or organic fiber, average particle size 3 It contains ˜20 μm quartz powder, fibrous particles or flaky particles having an average particle size of 1 mm or less, a water reducing agent and water. In the present embodiment, a compound containing these materials is molded and cured to obtain a plate-like hardened cementitious material, and a stainless steel plate bonded thereto is used. Specifically, a fiber reinforced concrete plate 23a having a thickness of 12 mm and a stainless steel plate 23b having a thickness of 0.5 mm bonded to one side thereof with an epoxy adhesive was used.

The type of cement used for forming the fiber reinforced concrete board is not particularly limited. For example, various portland cements such as ordinary portland cement, early-strength portland cement, medium heat portland cement, and low heat portland cement, Further, mixed cement such as blast furnace cement and fly ash cement can be used.
When trying to improve early strength development, it is preferable to use early-strength Portland cement, and when trying to improve the fluidity of the blend, use moderately hot Portland cement or low heat Portland cement. Is preferred.

As the pozzolanic fine powder, those having an average particle size of 1.0 μm or less are used. If the average particle size exceeds 1.0 μm, the strength development of the cured product is lowered, which is not preferable.
Examples of the pozzolanic fine powder include silica fume, silica dust, fly ash, slag, volcanic ash, silica sol, and precipitated silica. Among these, silica fume and silica dust have an average particle size of 1.0 μm or less and are not costly because they do not need to be crushed.

The blending amount of the pozzolanic fine powder is preferably 5 to 50 parts by mass with respect to 100 parts by mass of cement from the viewpoint of fluidity of the blend and strength development of the cured body.
When the blending amount is less than 5 parts by mass or exceeds 50 parts by mass, the fluidity of the blend is lowered, and operations such as molding become difficult. In addition, the strength development and durability of the cured body are reduced, and after the start of use of the cured body, there is a possibility that a part of the cured body may be chipped or peeled off, and the appearance may be deteriorated accordingly. Is not preferable.

A fine aggregate having a maximum particle size of 2 mm or less is used. If the maximum particle size of the fine aggregate exceeds 2 mm, the strength expression of the cured body is lowered, which is not preferable.
In addition, it is preferable to use a fine aggregate having a maximum particle size of 1.5 mm or less from the viewpoint of strength development of the cured body.
As the fine aggregate, for example, river sand, land sand, sea sand, crushed sand, silica sand, or a mixture thereof can be used.
The amount of fine aggregate blended is 100 parts by mass of cement from the viewpoint of fluidity of the blend, strength development of the cured body, and further reduction of self-shrinkage and drying shrinkage, reduction of hydration heat generation, etc. The amount is preferably 50 to 250 parts by mass, more preferably 80 to 180 parts by mass.

Metal fibers or organic fibers are used as the reinforcing fibers.
Examples of metal fibers include steel fibers and amorphous fibers. Among these, steel fibers are preferably used because they have high strength and are excellent in terms of cost and availability.
The shape and dimensions of the metal fibers are preferably a length of 2 mm or more and a length / diameter ratio of 20 or more, more preferably a length of 2 to 30 mm and a length / diameter ratio of 20 ~ 200.
If the length of the metal fiber is less than 2 mm, the effect of improving the bending strength is lowered, which is not preferable. If the length exceeds 30 mm, fiber balls are likely to be produced during kneading, which is not preferable.
If the length / diameter ratio of the metal fibers is less than 20, the number of fibers with the same blending amount (same volume) decreases, and the effect of improving the bending strength is reduced, which is not preferable. If the ratio exceeds 200, the strength of the metal fiber itself is insufficient, and it is easy to break when subjected to tension, which is not preferable.
The compounding quantity of a metal fiber is a volume ratio in a compound, Preferably it is 0.1 to 6%, More preferably, it is 0.5 to 5.5%. When the blending amount is less than 0.1%, the bending strength of the cured body may be lowered. If the blending amount exceeds 6%, the unit water amount must be increased in order to ensure workability during kneading, and the strength of the cured product may be reduced.

Examples of organic fibers include vinylon fibers, polypropylene fibers, polyethylene fibers, aramid fibers, and carbon fibers. Among these, vinylon fibers and polypropylene fibers are preferably used because they have high strength and are excellent in terms of cost and availability.
The shape and dimensions of the organic fibers are preferably 2 mm or more in length and a length / diameter ratio of 20 or more, more preferably 2 to 30 mm in length and 20 in length / diameter. ~ 500.
If the length of the organic fiber is less than 2 mm, the effect of improving the breaking strength is lowered, which is not preferable. If the length exceeds 30 mm, fiber balls are likely to be produced during kneading, which is not preferable.
If the ratio of the length / diameter of the organic fiber is less than 20, the number of organic fibers in the same blending amount (same volume) decreases, and the effect of improving the breaking strength is lowered, which is not preferable. If the ratio exceeds 500, the strength of the organic fiber itself is insufficient, and it is easy to break when subjected to tension, which is not preferable.

The compounding amount of the organic fiber is preferably 0.1 to 10%, more preferably 0.5 to 8.0%, by volume ratio in the composition. If the blending amount is less than 0.1%, the fracture energy may decrease. If the blending amount exceeds 10%, the unit water amount must be increased in order to ensure workability during kneading, and the strength of the cured product may be reduced.
Metal fibers and organic fibers may be used in combination. In this case, the blending amount (total amount) of the metal fiber and the organic fiber is a volume ratio in the blend, and is preferably 0.1 to 10%, more preferably 0.5 to 8.0%.

As the quartz powder, one having an average particle diameter of 3 to 20 μm (preferably 4 to 10 μm) is used. If the average particle diameter is outside the above range, the fluidity of the blend and the strength development of the cured product are lowered, which is not preferable.
Examples of the quartz powder include quartz, amorphous quartz, opal and cristobalite silica-containing powders, and the like.
The blending amount of the quartz powder is preferably 5 to 50 parts by mass with respect to 100 parts by mass of cement from the viewpoint of fluidity of the compound and strength development of the cured body.

As the fibrous particles or flaky particles, those having an average particle size of 1 mm or less are used. If the average particle size exceeds 1 mm, the strength development of the cured product is lowered, which is not preferable.
In the present specification, the “particle size” of fibrous particles or flaky particles means the size of the maximum dimension (particularly, the length of fibrous particles).
Examples of the fibrous particles include wollastonite, bauxite, mullite, and the like.
Examples of the flaky particles include mica flakes, talc flakes, vermiculite flakes, and alumina flakes.

The blending amount of the fibrous particles or flaky particles (however, when these two types of particles are used in combination) is preferably from the viewpoint of the fluidity of the blend and the strength development and toughness of the cured body. It is 3-35 mass parts with respect to 100 mass parts of cement.
In addition, as a fibrous particle, it is preferable to use a thing with a needle-like degree represented by ratio of length / diameter 3 or more from a viewpoint of improving the toughness of a hardening body.
As the water reducing agent, for example, water reducing agents such as lignin, naphthalene sulfonic acid, melamine, and polycarboxylic acid, AE water reducing agent, high performance water reducing agent, or high performance AE water reducing agent can be used. Among these, polycarboxylic acid-based high-performance water reducing agents and high-performance AE water reducing agents are preferably used because they have a large water-reducing effect.

The blending amount of the water reducing agent is preferably 0.1 to 4.0 parts by mass, more preferably 0.3 to 1.5 parts by mass in terms of solid content with respect to 100 parts by mass of cement. If the blending amount is less than 0.1 parts by mass, kneading becomes difficult and the fluidity of the blend decreases, which is not preferable. When the blending amount exceeds 4.0 parts by mass, the strength development of the cured body is lowered, which is not preferable.
The water reducing agent can be used in either liquid or powder form.

The amount of water is preferably 10 to 30 parts by mass, more preferably 15 to 25 parts by mass with respect to 100 parts by mass of cement. When the amount is less than 10 parts by mass, kneading becomes difficult and the fluidity of the blend becomes low, which is not preferable. When the amount exceeds 30 parts by mass, the strength development of the cured body is lowered, which is not preferable.
The kneading method of the blend is not particularly limited, for example,
(1) A method in which materials other than water and a water reducing agent are mixed in advance to prepare a premix material, and the premix material, water and water reducing agent are charged into a mixer and kneaded;
(2) A method in which a material other than water (however, a powdered material is used as a water reducing agent) is mixed in advance to prepare a premix material, and the premix and water are put into a mixer and kneaded. ;
(3) A method in which each material is individually fed into a mixer and kneaded;
Etc.
As the mixer used for kneading, any type of mixer used for ordinary concrete kneading can be used, and examples thereof include an oscillating mixer, a pan-type mixer, and a biaxial kneading mixer.

  After kneading, the composition is put into a predetermined mold, molded, and then cured to complete the fiber reinforced concrete plate 23a. The curing method includes air curing, underwater curing, steam curing and the like.

The physical properties of the blend in this embodiment are as follows.
The blend used in the present embodiment has a flow value of 230 mm or more measured without performing 15 drop movements in the method described in “JIS R 5201 (Cement physical test method) 11. Flow test”. It is excellent in fluidity. Therefore, it is possible to easily perform the kneading operation of the blend, the operation of putting it in the mold and molding it. In particular, since the composition reaches every corner in the mold, it is not limited to the case of forming a plate, but is advantageous when a molded body having a desired shape is produced with high accuracy.

The cured product obtained by curing this compound expresses a compressive strength of 130 MPa or more and a bending strength of 20 MPa or more, and is structurally very dense, so that mechanical strength and durability are reduced. It is hard to occur.
In addition, even when it comes into contact with water, water does not enter inside, and even when metal fibers are contained, rust does not occur in the metal fibers, and the reinforcing effect by the metal fibers has been maintained for many years. Can be maintained.
Furthermore, since chipping and peeling hardly occur, the appearance is maintained in a good state.
Hereafter, the preparation example of the compound used for manufacture of a fiber reinforced concrete board by this embodiment and the measured value of the physical property are demonstrated.

[Materials used]
The following materials were used.
1) Cement; Low heat Portland cement (manufactured by Taiheiyo Cement Co., Ltd.)
2) Pozzolanic fine powder; silica fume (average particle size: 0.25 μm)
3) Fine aggregate: silica sand No. 5 4) Metal fiber: Steel fiber (diameter: 0.2 mm, length: 15 mm)
5) Organic fiber: Vinylon fiber (diameter: 0.3 mm, length: 15 mm)
6) Water reducing agent; polycarboxylic acid-based high-performance AE water reducing agent 7) Water; tap water 8) Quartz powder (average particle size: 7 μm)
9) Fibrous particles; wollastonite (average length: 0.3 mm, length / diameter ratio: 4)
[Formulation Example 1]
(1) Material and blending ratio 100 parts by mass of low heat Portland cement, 30 parts by mass of silica fume, 120 parts by mass of fine aggregate, 1.0 part by mass of high-performance AE water reducing agent (solid content conversion value), 22 parts by mass of water, quartz powder 32 parts by mass, 24 parts by mass of wollastonite, and steel fibers (volume ratio in the composition: 2%) were put into a biaxial kneader and kneaded to obtain a composition.
(2) Flow value of the blend The flow value of the blend was measured without performing 15 drop motions in the method described in “JIS R 5201 (Cement physical test method) 11. Flow test”. . As a result, the flow value was 250 mm.
(3) Strength of blend The blend was poured into a 50 mm x 100 mm mold, pre-positioned at 20 ° C for 48 hours, and then steam-cured at 90 ° C for 48 hours to obtain cured bodies (three). The compression strength (average value of the three pieces) of the cured body was 230 MPa.
The blend was poured into a 4 × 4 × 16 cm mold, pre-positioned at 20 ° C. for 48 hours, and then steam-cured at 90 ° C. for 48 hours to obtain cured bodies (3 pieces). The bending strength (average value of the three pieces) of the cured body was 45 MPa.
(4) Water permeability coefficient of blend The blend was poured into a φ50 × 100 mm mold, pre-positioned at 20 ° C. for 48 hours, and then subjected to steam curing at 90 ° C. for 48 hours to obtain cured bodies (three). The water permeability coefficient of the cured body was measured by the water level permeability test method of “Geotechnical Society Standard JGS 0231 (Soil permeability test method)”. As a result, water penetration was not observed, and the water permeability coefficient was 0.

[Formulation Example 2]
(1) Material and blending ratio 100 parts by mass of low heat Portland cement, 30 parts by mass of silica fume, 120 parts by mass of fine aggregate, 1.0 part by mass of high-performance AE water reducing agent (solid content conversion value), 22 parts by mass of water, quartz powder 32 parts by mass, 24 parts by mass of wollastonite, and vinylon fibers (volume ratio in the formulation: 3%) were charged into a biaxial kneader and kneaded to obtain a formulation.
(2) Flow value of the blend The flow value of the blend was measured without performing 15 drop motions in the method described in “JIS R 5201 (Cement physical test method) 11. Flow test”. . As a result, the flow value was 240 mm.
(3) Strength of blend The blend was poured into a 50 mm x 100 mm mold, pre-positioned at 20 ° C for 48 hours, and then steam-cured at 90 ° C for 48 hours to obtain cured bodies (three). The compression strength (average value of the three pieces) of the cured body was 150 MPa.

The blend was poured into a 4 × 4 × 16 cm mold, pre-positioned at 20 ° C. for 48 hours, and then steam-cured at 90 ° C. for 48 hours to obtain cured bodies (3 pieces). The bending strength (average value of the three pieces) of the cured body was 22 MPa.
(4) Water Permeability Coefficient of Formulation The formulation was poured into a φ50 × 100 mm mold, pre-positioned at 20 ° C. for 48 hours, and then subjected to steam curing at 90 ° C. for 48 hours to obtain a cured product. The water permeability coefficient of the cured body was measured by the water level permeability test method of “Geotechnical Society Standard JGS 0231 (Soil permeability test method)”. As a result, water penetration was not observed, and the water permeability coefficient was 0.

  The present inventor prepared a sample and performed a bending test in order to confirm the strength of a high-strength composite concrete plate obtained by bonding a stainless steel plate to the above-described fiber-reinforced concrete plate. As a sample, a mixture was obtained with the materials and blending ratios shown in Formulation Example 1 above, and this mixture was put into a mold to prepare a fiber-reinforced concrete plate having a length of 600 mm, a width of 750 mm, and a thickness of 10 mm. A stainless steel plate having a thickness of 0.5 mm was bonded to the concrete plate with an epoxy adhesive to obtain a composite concrete plate.

  On the center line parallel to the long side of the composite concrete plate, a hole having a diameter of 120 mm (hole 23d for allowing the drainage pipe 22 to pass) is formed around a point 105 mm away from the center point of the plate. did. A sample of only a fiber reinforced concrete plate, which differs only in that the stainless steel plate is not bonded to the inventive product sample, was prepared and used as a comparative product sample.

  And the bending test was done about these samples. In the bending test, the sample is placed on a platform having an opening of 400 mm in length and 650 mm in width so that the center of the sample coincides with the center of the opening of the platform, and the four sides of the sample are around the opening of the platform. Set so that the stainless steel plate is on the lower side for the invention sample, and adhere the four sides of the sample to the base plate with an epoxy resin. On the center line parallel to the side, a concentrated load is applied from the top to a point 75 mm away from the center of the sample to the opposite side of the hole, and the concentrated load is increased by 1 kN.

As a result of this bending test, the comparative sample was destroyed at 10 kN. At 9 kN, which is the test load before breaking, the comparative sample had a deflection of 9.6 mm at the point of load application. In contrast, the inventive sample did not break even at 28 kN, and the amount of deflection at the load application point at 9 kN, which was the test load before destruction of the comparative sample, was 2.5 mm. From the results of this bending test, it is understood that the high-strength composite concrete plate of the present invention is a plate material that is difficult to bend and has excellent bending resistance.
Such improvement in bending difficulty and bending resistance is not limited to the case where a stainless steel plate is attached to a fiber reinforced concrete plate, but is commonly seen in a composite concrete plate in which a metal plate is attached to a concrete plate.

Now, a level adjusting bolt 24 is screwed on the lower surface side of the peripheral portion such as a corner portion of the high-strength composite concrete plate 23 placed on the Japanese-style toilet 10 as described above so that it can be screwed up and down. Has been. A lock nut 25 is screwed onto the bolt 24.
By adjusting the downward projecting length of the bolt 24, the high strength composite concrete plate 23 is leveled. At this time, it is preferable that the high-strength composite concrete plate 23 is separated slightly upward from the upper edge of the Japanese-style toilet 10 so that the high-strength composite concrete plate 23 does not rattle. In this way, the load of the later-described Western-style toilet 30 is not applied to the Japanese-style toilet 10. Thus, even if the high-strength composite concrete plate 23 is arranged away from the Japanese-style toilet 10, the high-strength composite concrete plate 23 is high-strength as described above. Even if it gets on the concrete board 23, it hardly bends and it can work safely.

  Next, as shown in FIG. 7, a portion of the upper end of the drainage pipe 21 protruding from the high-strength composite concrete plate 23 is cut, and the drainage socket 27 shown in FIG.

Thereafter, as shown in FIGS. 8 and 9, the self-hardening material 26 is supplied onto the floor 1 around the Japanese-style toilet 10 and leveled flat. As the self-hardening material 26, a lightweight, quick-drying, and non-shrinkable mortar is preferable, and the upper surface level is preferably flush with the upper surface of the high-strength composite concrete plate 23. When tiled on the hard material 26, the level is lower than the upper surface of the high-strength composite concrete plate 23. When finishing the self-hardening material 26 with a sheet material such as a vinyl chloride sheet, the level of the self-hardening material 26 is flush with the upper surface of the high-strength composite concrete plate 23, and the high-strength composite concrete plate 23 is also on the top. You may make it cover with a sheet material. In addition, it is preferable to fill the self-hardening material 26 also under the high-strength composite concrete plate 23.
When the self-hardening material 26 is supplied and leveled, the high-strength composite concrete plate 23 has high strength and can be reduced in thickness, so that the thickness of the self-hardening material 26 can also be reduced and the material cost can be reduced. .

  In addition, the process which cuts and removes the part which protrudes from the high-strength composite concrete board 23 among the upper end sides of the drain pipe 21, and attaches the drain socket 27 to the upper end of the drain pipe 21 supplies the self-hardening material 26 and hardens. It may be after making it. Although not shown in the drawing, a floor surface finishing process such as tiling is performed on the upper surface of the self-hardening material 26 as necessary. And the Western-style toilet 30 is installed on the high-strength composite concrete board 23, connecting the drain outlet of the Western-style toilet 30 and the drain pipe 21 via the drain socket 27. The entire Western-style toilet 30 may be placed on the high-strength composite concrete plate 23, or a part thereof may protrude from the high-strength composite concrete plate 23.

  In this Japanese-Western refurbishment method, only the front concealed portion 13 of the Japanese-style toilet 10 is cut and removed, the rim of the Japanese-style toilet 10 is left, and this rim is locked to the edge of the opening 2 of the floor 1 Therefore, the locking strength of the Japanese-style toilet 10 to the floor 1 is high. Moreover, the cover material 22 is attached to the Japanese-style toilet 10, so that water can be prevented from entering the Japanese-style toilet 10. In addition, since the Japanese-style toilet 10 is not filled with the filler, the Japanese-style toilet 10 does not become heavy, and the floor slab 1 that supports the Japanese-style toilet 10 or the sheet 20 for preventing the Japanese-style toilet 10 from dropping and scattering. The load on can be reduced. Moreover, since the sheet 20 is pasted, even if the Japanese-style toilet 10 is cracked, there is little risk of falling. Furthermore, since the Japanese-style toilet bowl 10 is covered with a high-strength concrete plate 23 to make it a part of a new floor surface, even if the operator gets on the new floor surface, it is easy to work and high strength. Since the thickness of the concrete board 23 can be made thin, the usage-amount of the self-hardening material 26 can be decreased.

[Second Embodiment]
FIGS. 11-16 shows the 2nd Embodiment of this invention, The construction method which removes the whole upper edge of the Japanese style toilet bowl 10 is demonstrated with reference to this FIGS. 11-16.
FIG. 11 is a cross-sectional view corresponding to FIG. 2 of the first embodiment. As shown in FIG. 11, the upper part from the floor 1 of the Japanese-style toilet 10 is cut and removed with a diamond cutter or the like, so that the floor 1 and the cut surface of the Japanese-style toilet 10 are flush with each other. However, the cut surface of the Japanese-style toilet 10 may be slightly higher than the upper surface of the floor 1. In this case, a slight gap is provided between the high-strength composite concrete plate 23 and the cut surface so that no load is applied to the Japanese-style toilet 10 from the high-strength composite concrete plate 23.

Next, as shown in FIG. 12 (corresponding to FIG. 4A of the above embodiment), the fall and scattering prevention sheet 20 is attached to the inner surface of the Japanese-style toilet 10. Next, as shown in FIG. 13, one end of a high-strength wire 31 such as a stainless wire is hung on the Japanese-style toilet 10, and the other end is connected to a screw 32 on the floor 1 to prevent the Japanese-style toilet 10 from falling. The one end of the high-strength wire 31 is inserted into the opening 12a provided in the Japanese-style toilet 10, or is hooked to the edge of the opening 12a via a hook 33. The screw 32 is driven into the upper surface of the floor 1.
After the drainage pipe 21 is erected, the lid member 22 is attached to the Japanese-style toilet 10 as in the above embodiment. At this time, the level of the upper surface of the lid member 22 is level with the upper surface of the floor 1 or slightly lower (for example, within 5 mm).

Next, as shown in FIGS. 13 and 14, a high-strength composite concrete plate 23 is placed so as to cover the Japanese-style toilet 10 and the floor 1 around it, and a drain socket 27 is attached to the drain pipe 21.
An elastic adhesive such as a modified silicone adhesive is preferably interposed between the cut surface of the Japanese-style toilet 10 and the lid member 22 and the high-strength composite concrete plate 23. Further, the high-strength composite concrete plate 23 and the floor 1 are bonded together with a two-component epoxy adhesive or the like.

Thereafter, as shown in FIG. 16, a self-hardening material 26 is supplied around the high-strength composite concrete plate 23 and leveled. After the self-hardening material 26 is cured, the Western style toilet 30 is installed. In this embodiment, the level of the western style toilet 30 is lower than that of the first embodiment.
As shown in FIG. 16, when the screw 32 is struck outside the high-strength composite concrete plate 23, the high-strength composite concrete plate 23 can be brought into contact with the floor 1 in a face-to-face manner. Sticking is prevented.

[Third Embodiment]
In each of the embodiments described above, the floor 1 is constituted by a slab up to the edge of the opening 2, but as shown in FIG. 17, a relatively large opening 2A is provided in the slab 1A, and a mortar 1M is provided on the inner surface of the opening 2A. There is also a Japanese-style toilet room that can be packed with.

When refurbishing such a Japanese-style toilet room, a sufficiently large one that hangs on the slab 1A is used as the high-strength composite concrete plate 23 as shown in FIG.
FIG. 18 is an example applied to the embodiment of FIGS. 11 to 16 in which the upper part of the Japanese-style toilet 10 is removed over the entire circumference, but the same applies to the embodiment of FIGS. 1 to 9 in which only the front concealment portion 13 is removed. Applies to That is, in this case, a high-strength composite concrete plate 23 that is sufficiently large so that the bolt 24 hits the slab 1A is used.

[Fourth Embodiment]
FIG. 19 shows an example of refurbishing a toilet room in which the floor 1 is a slab 1a and a tile 1b is pasted as a finishing layer on a floor mortar 1c. In this case, only the upper part of the Japanese style toilet bowl 10 above the upper surface of the tile 1b may be cut and removed, but only the finishing layer made of the tile 1b and the pasting mortar 1c is exposed so that the upper face of the slab 1a is exposed. It may be cut and removed together with the upper edge. Subsequent treatment may be performed by any of the methods shown in FIGS. 1 to 9 and FIGS.
According to this embodiment, the level of the western style toilet 30 is further lowered.

[Other Embodiments]
In the present invention, as shown in FIG. 20, the fall and scattering prevention sheet 20 may be attached so as to cover the cut upper edge surface of the Japanese-style toilet 10. Moreover, although not shown in figure, the sheet | seat 20 for fall and scattering prevention may be projected and stuck to the upper surface of the floor 1 around the Japanese-style toilet 10.
In the embodiment of FIGS. 11 to 16, the screw 32 is arranged outside the high-strength composite concrete plate 23, but the screw 32 is arranged below the high-strength composite concrete plate 23 as shown in FIG. 21. Also good. Reference numeral 35 in FIG. 21 indicates an elastic adhesive between the lid member 22 and the high-strength composite concrete plate 23, and 36 indicates an epoxy-based adhesive that bonds the high-strength composite concrete plate 23 to the floor 1.

  In the present invention, at least a part of the exposed surface of the Japanese-style toilet 10 may be scratched with an iron brush or the like prior to attachment of the sheet 20 for preventing falling and scattering. If it does in this way, the joint strength of fall and scattering prevention sheet 20 and Japanese style toilet bowl 10 will increase, and the maintenance strength of Japanese style toilet bowl 10 will become very high.

  In the above embodiment, the fall and scattering prevention sheet 20 is constituted by a self-adhesive sheet. However, in the present invention, the fall and scattering prevention sheet 20 is constituted by a material other than the self-adhesive sheet, and an adhesive. For example, it may be attached to the Japanese-style toilet bowl 10.

  As the falling and scattering prevention sheet 20, various fiber mats such as a glass fiber mat, a metal fiber mat, and a carbon fiber (carbon fiber) mat impregnated with an adhesive may be used. In addition, a glass fiber mat is suitable from the viewpoint of cost, good handleability, and high holding strength of the Japanese-style toilet 10 after bonding. In this case, as the adhesive, an epoxy resin-based adhesive is preferable because of the high adhesive force between the glass fiber mat and the vitreous material on the surface of the Japanese-style toilet 10.

When the sheet 20 for preventing falling and scattering made of glass fiber mat or the like is adhered to the exposed surface of the Japanese-style toilet 10 with an adhesive, the exposed surface is rubbed with an iron brush prior to the pasting. Thus, by attaching at least a part of the exposed surface, preferably the entire part to which the adhesive is attached, the adhesive force between the scattering prevention sheet 20 and the Japanese-style toilet 10 can be increased.
In the present invention, the adhesive may be used by adhering to or impregnating a fiber mat such as a glass fiber mat on site.

  In the present invention, prior to fitting the lid material 22 into the Japanese-style toilet 10, the Japanese-style toilet 10 may be filled with foamed resin beads.

In this way, the Japanese toilet bowl 10 is filled with foamed resin beads, and the lid 22 is placed on the beads so as to be fitted into the Japanese toilet bowl 10, so that the lid 22 is filled. Can be prevented from falling into the Japanese-style toilet 10 due to the weight or the load on the floor. Since the beads 26 are made of foamed resin and are lightweight, even if the beads are filled in the Japanese-style toilet 10, the Japanese-style toilet 10 is not subjected to an excessively large load.
In addition, even if water enters the Japanese-style toilet 10, the beads are filled in the Japanese-style toilet 10 in this way, so that water does not easily accumulate in the Japanese-style toilet 10, and the Japanese-style toilet is Even if a damage such as a crack occurs in 10, a large amount of water does not leak downstairs.

In the present invention, the Western-style toilet 30 may be installed such that the front-rear direction at the time of installation is crossed with the front-rear direction of the Japanese-style toilet 10 originally installed in the toilet room. It may be made to become.
In the above embodiment, after the high-strength composite concrete plate 23 is installed, the self-hardening material 26 is supplied and leveled. However, the self-hardening material 26 is first cut into the cut surface of the Japanese-style toilet 10 or the lid 22. It may be supplied and leveled according to the upper surface level, and then the high-strength composite concrete plate 23 may be installed.

In the high-strength composite concrete plate 23, the means for attaching the metal plate 23b to the concrete plate 23a is not limited to that using the adhesive 23c. For example, a protrusion may be provided on the metal plate 23b and the protrusion of the metal plate 23b may be embedded in the concrete plate 23a when the concrete plate 23a is molded.
The high-strength composite concrete plate 23 may be obtained by attaching metal plates 23b to both sides of the concrete plate 23a.

Explanatory drawing 1 of the repair procedure of the toilet room by the Japanese-Western repair method of the toilet according to the first embodiment of the present invention Toilet room refurbishment procedure part 2 Toilet room refurbishment procedure part 3 Toilet room refurbishment procedure part 4 Explanatory diagram of toilet room refurbishment part 5 Toilet room refurbishment procedure part 6 Explanatory diagram of toilet room refurbishment part 7 Toilet room refurbishment procedure part 8 It is a longitudinal cross-sectional view after installing a Western-style toilet bowl. Partial enlarged sectional view of high-strength composite concrete board Explanatory drawing 1 of the repair procedure of the toilet room by the Japanese and Western repair method of the toilet according to the second embodiment of the present invention Toilet room refurbishment procedure part 2 Toilet room refurbishment procedure part 3 Toilet room refurbishment procedure part 4 Explanatory diagram of toilet room refurbishment part 5 Toilet room refurbishment procedure part 6 Explanatory drawing 1 of the repair procedure of the toilet room by the Japanese-Western repair method of the toilet according to the third embodiment of the present invention Toilet room refurbishment procedure part 2 Explanatory drawing of the repair procedure of the toilet room by the Japanese-Western repair method of the toilet which concerns on the 4th Embodiment of this invention. Explanatory drawing of the repair procedure of the toilet by the Japanese and Western repair method of the toilet according to other embodiments Explanatory drawing of the repair procedure of the toilet by the Japanese-Western repair method of the toilet according to another different embodiment

Explanation of symbols

  In the figure, 1 is a floor, 1A and 1a are floor slabs, 1b is a tile, 1c is a mortar, 1M is a mortar, 2 and 2A are openings for installing a Japanese-style toilet, 3 is a defecation pipe, 10 is a Japanese-style toilet and 11 is a drain Mouth, 12 is a toilet bowl, 13 is a front concealment part, 15 is a drain trap, 20 is a sheet for preventing falling and scattering, 21 is a drain pipe, 22 is a lid, 23 is a high strength composite concrete board, 23a is a concrete board, 23b is a metal plate, 24 is a bolt, 25 is a nut, 26 is a self-hardening material, 27 is a drain socket, 31 is a high-strength wire, 32 is a screw, and 33 is a hook.

Claims (6)

In the Japanese-Western refurbishment method for toilets, where a toilet room with a Japanese-style toilet is installed on the floor is replaced with a toilet room with a Western-style toilet.
Removing at least the front concealment of the upper part of the Japanese-style toilet;
Starting a drain pipe so as to communicate with the drain of the Japanese-style toilet;
Fitting a lid into the upper part of the Japanese-style toilet;
Installing a high-strength composite concrete plate formed by attaching a metal plate to at least one side of the concrete plate so as to cover the upper side of the lid material and the Japanese-style toilet and the floor around the Japanese-style toilet;
Supplying a self-hardening material on the floor;
Then, installing the Western-style toilet bowl,
A method for refurbishing Japanese and Western toilets. In the Japanese-Western refurbishment method for the toilet according to claim 1,
In the high-strength composite concrete board, the concrete board is made of a fiber-reinforced concrete board containing fibers, and is a Japanese-Western refurbishment method for toilets. In the Japanese-Western refurbishment method of the toilet according to claim 2,
The fiber reinforced concrete board is made of cement, pozzolanic fine powder having an average particle size of 1.0 μm or less, fine aggregate having a maximum particle size of 2 mm or less, metal fiber or organic fiber, quartz powder having an average particle size of 3 to 20 μm, average particle size A method for refurbishing Japanese and Western toilets, comprising a composition comprising fibrous particles or flaky particles of 1 mm or less, a water reducing agent and water. It is used in a Japanese-Western refurbishment method for a toilet that renovates a toilet room with a Japanese-style toilet on the floor into a toilet room with a Western-style toilet.
The Japanese and Western refurbishment method for the toilet
Removing at least the front concealment of the upper part of the Japanese-style toilet;
Starting a drain pipe so as to communicate with the drain of the Japanese-style toilet;
Fitting a lid into the upper part of the Japanese-style toilet;
Installing a high-strength composite concrete plate so as to cover the lid and the upper side of the Japanese-style toilet and the floor around the Japanese-style toilet;
Supplying a self-hardening material on the floor;
Then, installing the Western-style toilet bowl,
A method having
The high-strength composite concrete plate used in this method, high-strength composite concrete slab, characterized in that it is made by attaching a metal plate on at least one side of the concrete plate. In the high-strength composite concrete board of Claim 4,
The said concrete board consists of a fiber reinforced concrete board containing a fiber, The high-strength composite concrete board characterized by the above-mentioned. In the high-strength composite concrete board of Claim 5,
The fiber reinforced concrete board is made of cement, pozzolanic fine powder having an average particle size of 1.0 μm or less, fine aggregate having a maximum particle size of 2 mm or less, metal fiber or organic fiber, quartz powder having an average particle size of 3 to 20 μm, average particle size A high-strength composite concrete board comprising a blend containing fibrous particles or flaky particles of 1 mm or less, a water reducing agent and water.

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