JPH1046688A - Environment maintaining method in under floor of building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To maintain environment in under floor of a building in a good condition and to provide technology capable of maintaining specially the enclosed under floor of the building in a good condition. SOLUTION: In the underfloor soil surface of a building, a film having moisture permeability of 1,000g/m<2> .24hrs-20,000g/m<2> .24hrs and/or nonwoven fabric is laid, and a mixture of inorganic porous fine grain body of 20-100Å with average narrow hole radius and 20-200m<2> /gr with specific surface area and fine grain coal of 1.5-100Å with average narrow hole radius and 50-600m<2> /gr with specific surface area are so laid on the film and/or nonwoven fabric that the mutual mixed ratio reaches 20-80wt.%. By the constitution, the environment under the floor of the building is maintained in a good condition, specially the enclosed under floor of the building is maintained in a good condition, moisture in the under floor can be adjusted in a proper state, and the underfloor environment can be held in a favorable state. Moisture absorption and moisture release of hygroscopic moisture are kept in good balance, steam quantity in the enclosed under floor space can be maintained in a constant state, and it can be useful for preventing organic substance in underfloor soil from being rotted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for maintaining an environment under a floor of a building, and more particularly to a technique capable of maintaining an environment under the floor of a closed building in a favorable state.

[0002]

BACKGROUND OF THE INVENTION Buildings, especially wooden houses, are susceptible to microbial degradation. For example, wood is decomposed by wood rot fungi and the like, the wood is damaged by termites, and molds propagate on the wood surface. Damage by termites and the like is mainly susceptible to dark places and places with low ventilation and high humidity. The underfloor has poor ventilation and high humidity, making it a livable place for termites and mold to breed. In recent years, due to changes in building materials and construction methods, the hermeticity of buildings has been higher than before, and they are often kept in a high humidity state that causes wood decay and ant damage. In particular, under a closed floor, the environment tends to fall into an unfavorable state for a building. For the preservation of wood, in buildings, especially wooden houses,
Antiseptic, insect repellent, and termite treatments have been performed, and various methods have been tried in the past. For example, a soil treatment agent (liquid agent) is sprayed on the underfloor soil for the purpose of termite control, or the base is treated with CCA (chromium, copper, arsenic compound-based wood preservative, JIS K 1554-197).
5) The used wood base is used. However, spraying a liquid drug onto the underfloor soil is a treatment method that contaminates the soil and also has a risk of the drug flowing out. Wood treated with CCA is effective at the time of use, but many problems have been pointed out when discarding it.
From the viewpoint of protection of the natural environment, this is not a preferable treatment method.
Under the floor, a large amount of moisture (humidity) rises from the soil surface. In order to cut off the moisture (humidity) and protect it from damage by termites and the like, a method of laying a so-called termite-proof moisture-proof sheet or film on the soil surface under the floor has been used (see, for example, Jpn.
2-52605, JP-A-5-98717), such a method of laying a sheet or a film,
On humid days, there are drawbacks such as dew condensation often seen on the upper surface of the sheet or film, and mold tends to grow.In addition, when the sheet or film is used alone, pests such as termites break from the seam or seams. There are drawbacks such as entry and exit. It has also been practiced to form a dry film on the soil surface by spraying an emulsion obtained by adding and mixing a drug to an asphalt emulsion (JP-A-56-115705 and JP-A-60-19834). This method has drawbacks such as a long time required to form the dried film and a breakage of the film due to stress when the film is dried. By the way, under the floor, while a large amount of moisture (humidity) rises from the soil surface, moisture (humidity) from the outside air enters under the floor. In such a case, it is necessary to absorb the moisture sufficiently so as not to rise to the upper part of the house. On the other hand, if this moisture absorption is performed unilaterally and the absorbed moisture is not easily released, the balance between moisture absorption and moisture release is required. It is difficult to control the humidity taken, and the above-mentioned dew condensation occurs, and mold tends to grow. The occurrence of the above mold makes the underfloor musty. Originally, under the floor of the house, ventilation is poor and off-flavors are apt to be generated, and the hermeticity of the building is increasing.
Makes it easy to stagnate. Japanese Patent Application Laid-Open No. 1-295948 describes a control method in which a composition obtained by adsorbing a preservative, insect repellent and repellent agent on activated carbon is sprayed on the soil surface under the floor of a house. Due to lack of moisture release performance, there is a difficulty in humidity control performance. Japanese Patent Application Laid-Open No. 50-99870 discloses an insecticidal composition obtained by adsorbing a mixture of an insecticidal compound and a waterproof organic substance onto porous mineral particulates, and applying the composition to a ground surface under a house floor. Although the method of controlling house floor pests to be sprayed is described,
For the purpose of controlling pests under the floor, the performance is insufficient in terms of deodorizing effect and the like, and the above-mentioned humidity control performance also has disadvantages.
Therefore, in the conventional example, various methods have been tried in order to maintain a good underfloor environment, but all have their advantages and disadvantages, and at present there is no method that balances the above-mentioned performance aspects.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to provide a technique capable of maintaining the environment under the floor of a building in a good state, and in particular, capable of maintaining the environment under the floor of a closed building in a good state. Is to do. The above and other objects and novel features of the present invention will become apparent from the description of the present specification.

[0004]

SUMMARY OF THE INVENTION According to the present invention, a moisture permeability of 1000 g / m < ² >.
2,000 g / m ² · 24 hrs of film and / or non-woven fabric (hereinafter sometimes referred to as films) is laid, and a mixture of the inorganic porous powder and the powdered coal except the powdered coal is placed on the film. Concerning the environmental maintenance method under the floor of the building characterized by laying, as a preferred embodiment,
The average pore radius of the inorganic porous powder is 20 to 100 °, the specific surface area is 20 to ²⁰⁰ m ² / gr, the average pore radius of the pulverized coal is 1.5 to 100 °, and the specific surface area is 50 to 6
00 m ² / gr, the mixing ratio of the inorganic porous powder and the particulate coal to each other is 20 to 80% by weight, and the inorganic porous powder and the particulate coal are at least 50% Is JI
S Pass through a 19 mm sieve specified in Z8801;
It is characterized by being crushed particles that remain on a 3 mm sieve, and that at least one of inorganic porous particles, powdered charcoal, and films has been subjected to antiseptic, insect repellent, and termite-proof treatment. .

According to the present invention, under the floor, a film having appropriate moisture permeability is laid on the soil surface. Then, a mixture of the inorganic porous powder and the particulate coal is further laid on the film. According to the mixture of the inorganic porous powder and the particulate coal, not only has high moisture absorption performance,
By releasing moisture appropriately, the humidity under the floor can be adjusted to an appropriate state, preventing the occurrence of mold, preventing the invasion and propagation of harmful insects such as termites, and removing the unpleasant odor generated under the floor The effect is high, and the environment under the floor can be suitably preserved. The films have an appropriate moisture permeability and allow water vapor to permeate but block water, so the films are laid on the soil surface, and the inorganic porous powder and the powder are interposed via the films. If a mixture with granular coal is laid, water from the soil side can be blocked, so that the mixture can be prevented from being saturated with water and having a reduced capacity. Further, at this time, since the water vapor is permeated, it also contributes to the balance between the moisture absorption and the moisture release, and the amount of water vapor in the closed underfloor space can be kept constant. It is especially effective when the groundwater is high. In addition, if a mixture of the inorganic porous powder and the granular coal is laid through the film, scattering when the mixture of the inorganic porous powder and the granular coal is laid alone is prevented. it can. Further, by laying the films, the mixture of the inorganic porous granular material and the granular coal on the films becomes wet, and the influence of the wet mixture directly contacting the underfloor soil surface can be avoided.
It can be useful for preventing organic matter from being broken.

The film laid on the soil surface under the floor of the building used in the present invention has a moisture permeability of 1000 g / m ^2.
It is necessary to be in the range of 24 hrs to 20,000 g / m ² · 24 hrs. The moisture permeability is a moisture permeability under the condition of 40 ° C. and a relative humidity difference of 90%. When the moisture permeability of the film is less than 1000 g / m ² · 24 hrs, the permeation of water and water vapor is blocked, so that the generation of mold and the dew condensation can be suppressed at first, but thereafter, due to the rise in humidity, Mold develops and forms dew.
Also, if a mixture of inorganic porous powder and granulated coal is laid, it cannot contribute to the balance between moisture absorption and desorption of moisture due to the mixture, causing dew condensation and water stagnation on the film. And the mold odor cannot be suppressed. On the other hand, 200
When it exceeds 00 g / m ² · 24 hrs, the permeation of water and water vapor proceeds too much, and the mixture of the inorganic porous powder and the powdered coal tends to reach a saturated state sooner, and the capacity of the mixture is quickened. Examples of the films are not particularly limited as long as the film satisfies the above-mentioned moisture permeability, and polyethylene, ethylene-vinyl acetate copolymer, polyolefin resin film such as polypropylene, polyamide resin, polyester resin, polyvinyl chloride resin. And synthetic resin films such as polyvinyl alcohol, acetylcellulose, and polyurethane resins, nonwoven fabrics, and combinations thereof. Generally, a synthetic resin film is formed by adding an inorganic filler to a synthetic resin, forming a film, and then stretching the film.The moisture permeability can be freely adjusted by changing the amount of the inorganic filler and the stretching ratio. Can be adjusted.

[0007] The inorganic porous powder used in the present invention is a mixture of a porous powder and granules of an inorganic material such as crushing natural soil or crushing natural rock. As the inorganic porous powder, various types can be used, but typically, a diatomaceous earth obtained by pulverizing natural soil is preferably used. Pulverized natural soil of the diatomaceous earth is particularly excellent in moisture absorption and moisture release performance, among which the average pore radius is 20 to 10
0 °, preferably 20-60 °, and a specific surface area of 20-20
The one with 0 m ² / gr is good for the purpose of taking the balanced environmental preservation measures of the present invention. More than 50% (by weight) of the inorganic porous powder is JIS Z8
It is preferable that the crushed particles pass through a 19 mm sieve specified in 801 and remain on a 0.3 mm sieve. 0.3m
If it is less than m, it may be scattered by wind or the like to deteriorate the environment. In addition, when mixed with pulverized coal, the powder and the granular material are separated from each other, making it difficult to take balanced environmental conservation measures. On the other hand, when it exceeds 19 mm, it is difficult to lay a small amount uniformly on the soil surface,
It will be difficult to take balanced environmental conservation measures. Particularly preferred is 50% of the inorganic porous powder.
(Weight basis) 8 specified by JIS Z8801
The crushed particles pass through a 1.5-mm sieve and remain on the 1.5-mm sieve. When the diameter of the crushed particles exceeds 1.5 mm, termites cannot lift the crushed particles, further promoting the effect.

The granular coal used in the present invention refers to carbonized powdery or granular substances or a mixture of these powdery substances and particulate substances, such as wood and coconut shells. By carbonizing the plant, or
It is obtained by firing sludge and industrial waste. As described above, the granular coal may be in the form of powder, granular, or rod-like, but preferably granular coal having a particle size (diameter) of 0.3 to 19 mm. Particle size is 0.
If it is less than 3 mm, the particles are scattered when mixed with the inorganic porous particles, or when mixed with the inorganic porous particles, the powdered coal and the inorganic porous particles are separated and balanced. It is difficult to take environmental preservation measures.
When performing termite control, the drug is difficult to settle. on the other hand,
If it exceeds 19 mm, it is difficult to lay it evenly under the floor, even if the effect of absorbing and deodorizing is good, and it is difficult to take balanced environmental conservation measures unless it is used in large quantities. Pulverized coal has an average pore radius of 1.5 to 100 °.
And the specific surface area is 50 to 600 m ² / gr, preferably
Its average pore radius is 10-50 ° and its specific surface area is 100
It is preferably from 300 to 300 m ² / gr in order to mix the fine-grained coal with the inorganic porous fine powder and to take a balanced environmental preservation measure.

[0009] Pulverized coal has good adsorption and deodorizing effects, but has poor moisture release performance and has a drawback that it does not readily release absorbed moisture, but also has excellent moisture absorption performance when mixed with inorganic porous powder. In addition, it has excellent moisture release performance, and can take balanced environmental preservation measures. Moreover, the inorganic porous powder alone has odor selectivity with respect to the deodorizing effect, and there are substances that adsorb well and substances that do not easily adsorb.
By mixing with pulverized coal, the selectivity of the odor is reduced, and balanced environmental conservation measures can be taken. In order to take such balanced environmental preservation measures, it is important to mix both substances in an appropriate mixing ratio.If there is too much fine coal in the inorganic porous powder, it is difficult to remove the moisture absorbed. If the powder is not released and the balance with the moisture release property cannot be obtained, or if the amount of the inorganic porous powder is too large relative to the powdered coal, the balance with the deodorizing performance cannot be obtained. From such a viewpoint, the mixing ratio of the granular coal in the mixture of the inorganic porous granular material and the granular coal in the present invention is preferably 20 to 80% by weight. When the mixing ratio of pulverized coal exceeds 80% by weight,
It does not readily release the absorbed moisture, resulting in a lack of moisture absorption and desorption performance, and is easily condensed under the floor. If the mixing ratio of the pulverized coal is less than 20% by weight, deodorization and negative ion effects on the earth are low, and it is difficult to maintain a healthy environment for humans.

In the present invention, it is preferred that at least one of the above-mentioned inorganic porous powder, powdered charcoal, and films is subjected to antiseptic, insect repellent and termite control treatments. Various preservatives, insect repellents, and termiticides (hereinafter sometimes simply referred to as chemicals) can be used for the preservation, insect repellent and termite repellent treatments. When exemplified here, an organic phosphorus compound, a pyrethroid compound, a pyrethroid-like compound, a chloronicotyl compound, a carbamate compound, an organic chlorine compound, tripropyl isocyanurate, imidacloprid, a boron compound, a metal salt of naphthenic acid, an alkyl ammonium compound , Organic iodine compounds, phenols, 8-oxyquinolinol copper,
Chlorphenol and bromophenols, chlornaphthalenes, xylazanes, other compounds, and the like. These drugs are formulated and used in a form suitable for the drug itself. In the preservation, insect repellent, and termite repellent treatment of the inorganic porous powder and the particulate coal in the present invention, a wood vinegar liquid adsorption treatment can be performed. The wood vinegar can be obtained by carbonizing wood. When the liquid product obtained by carbonizing wood is allowed to stand, it separates into two layers. The upper layer containing acetic acid is wood vinegar. Hardwoods and conifers are used as wood species as raw materials. Waste material can also be used. The wood vinegar can be appropriately diluted with water for use. The wood vinegar solution contains harmful substances and low-boiling carbonyl compounds during its production. It also contains a part of wood tar, methanol, formaldehyde and the like. It is preferable to use a purified wood vinegar solution (pure wood vinegar solution). The wood vinegar solution contains acetic acid as an active ingredient in a high concentration, for example, near 73%. The pH is quite high, being 3 or less. As described above, when the preservative, insect repellent, and termite treatments are applied, if the treatment amount (adhesion amount) of the agent to inorganic porous powders, powdered charcoal, and films is excessive, the living environment is rather deteriorated. In some cases, the content is preferably set to 10 wt% or less.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION

[0012]

Next, examples of the present invention will be described. The moisture permeability of the film was measured according to the following measurement method. Moisture permeability of the film: The number of grams of water vapor passing through a film having a thickness of 0.1 mm and an area of 1 m ² in 24 hours under the conditions of 40 ° C. and a relative humidity difference of 90% [unit: g / m ² · 24 hr]
s].

Reference Example 1 2000 g / m each moisture permeability
^{2 · 24hrs, 6000g / m 2} · 24hrs and 1
Using a film of 2000 g / m ² · 24 hrs, PE
T (Polyethylene terephthalate) container (45m high)
m, a circular container having an opening diameter of 100 mm and a low side diameter of 80 mm), about 100 cc of substitute soil (horticultural culture soil: vermiculite: humus: water = 8: 1: 1: 1.5)
Then, a piece of cedar wood (20 × 20 × 10 mm) was placed on the soil surface, and the opening was covered with the film. Observation of changes in internal wood chips and the like and changes in the weight of the entire container were observed. Table 1 shows the results.

Comparative Reference Example 1. Moisture permeability of 10g / m ² · ²
Except that a 4 hrs film was used, the observation of changes in the wood chips inside the container and the change in weight of the entire container were observed in the same manner as in Reference Example 1. Table 1 shows the results.

[0015]

[Table 1]

Embodiment 1.980 × 1880 × 2700 m
built a prefabricated hut of m, build the underfloor space and under the floor height to 450mm, moisture permeability to the soil surface is 6000g / m ² ·
A 24 hrs film is laid, and the average pore radius is 20 to 40 ° and the specific surface area is 190 to 200 m ² / gr.
Diatomaceous earth (wakkanai siliceous shale) and average pore radius of 5-20
粉, pulverized coal having a specific surface area of 500 to 600 m ² / gr ((Diatomaceous earth and pulverized coal are both JIS Z88
018 through a 8mm sieve, JIS Z8801 2m
m containing 50 wt% or more of the powdery particles remaining on the sieve. ) And a mixture of 50:50 was laid, and the underfloor space was sealed.
5 mm) was hung, and 200 cc of water was given by a humidifier every day. The dew condensation in the underfloor space, the occurrence of mold, and the moisture content and condition of the wood chips were observed. Table 2 shows the results.

Embodiment 2 FIG. Moisture permeability 12000g / m ²・
Except that a 24 hrs film was used, the dew condensation in the underfloor space and the occurrence of mold and the moisture content and state of the wood chips were observed in the same manner as in Example 1. Table 2 shows the results.

Example 3 Diatomaceous earth contains 1.0% of an active pharmaceutical ingredient of chlorpyrifos.
In the same manner as in Example 1 except that the drug was adsorbed so as to be contained (wt, the same applies hereinafter), the dew condensation in the underfloor space, the occurrence of mold, and the moisture content and state of the wood chips were observed. Table 2 shows the results.

Comparative Example 1 6000g / moisture permeability on the soil surface
except that the state of the just laid the film of m ² · 24hrs, the same procedure as in Example 1, were observed moisture content and the state of occurrence and wood pieces of condensation and mold underfloor space. Table 3 shows the results.

Comparative Example 2 Moisture permeability of 600g / m ² · 24
Except that the hrs film was used, the same conditions as in Example 1 were used to observe the dew condensation in the underfloor space, the occurrence of mold, and the water content and state of the wood chips. Table 3 shows the results.

Comparative Example 3 The moisture permeability is 23000 g / m ^2.
Except that a 24 hrs film was used, the dew condensation in the underfloor space and the occurrence of mold and the moisture content and state of the wood chips were observed in the same manner as in Example 1. Table 3 shows the results.

[0022]

[Table 2]

[0023]

[Table 3]

Reference Example 2 Diatomaceous earth (Waknai layer siliceous shale) to which the drug is adsorbed so that the drug active ingredient of chlorpyrifos is contained at 1.0% (wt, the same applies hereinafter), the average pore radius is 20 to 40 mm, and the specific surface area is 190-200m ²
/ Gr. Diatomaceous earth (Wakkanai siliceous shale) and a granular coal having an average pore radius of 20 to 35 ° and a specific surface area of 200 m ² / gr were prepared at a ratio of 15:65:20. . In addition, these powdered coal and diatomaceous earth are both JIS.
Z8801 After passing through a 19 mm sieve, JIS Z880
The powder contained 50 wt% or more of the particles remaining on the 10.3 mm sieve. The mixture thus blended is tested for repellency and termite penetration based on the Japanese Wood Preservation Association Standard No. 17 "Method and Performance Standard for Indoor Termite Control of Non-wood Products Treated with Termites". The test was performed. Also, Japan Wood Preservation Association Standard No. 11 "Testing method for termite-controlling effectiveness of wood termiticides for coating, spraying and dipping (1) Laboratory test method"
A contact test was conducted according to Further, a moisture absorption / desorption performance test was performed as follows. That is, the petri dish (9
0mm ¢ × 20mmH), take 30gr of the blended product,
Weigh precisely, put it in a desiccator (inner diameter 180 mm × 180 mmH) containing 150 ml of 30 ° C. hot water at the bottom,
The sample was allowed to stand in a thermostat at 0 ° C. for 7 days. After the elapse, the sample was quickly measured to calculate the moisture absorption. Thereafter, the sample was allowed to stand at room temperature for 3 days, the weight of the sample was measured, and the amount of released moisture was determined. Further, the following test was performed to measure the deodorizing effect. That is, one of a detection tube (Kitakawa type detection tube, total capacity of 10 liters) in which a tetrabag having a gas inlet projecting at the upper right end and a tetrabag having a gas inlet projecting at the upper left end are connected by a rubber tube. On the tetra bag side, put the measurement liquid and vaporize, put air and adjust the gas initial concentration as follows,
A sample (10 g / 1 sample for each sample) was placed in the other tetrabag, and gas was transferred from one tetrabag connected to the rubber tube to the other tetrabag, and the gas absorbed by the sample was removed. The amount of absorption (%) was measured. Gas initial concentration: ammonia gas 1000 p. p. acetic acid gas 1000 p. p. m pyridine 200 p. p. m mercaptan 10 p. p. m trimethylbutane 10 p. p. m hydrogen sulfide 1000 p. p. m The test results are shown in Tables 4 to 6 and 8 to 9.

Reference Example 3 Diatomaceous earth (wakkanai siliceous shale) having an average pore radius of 50 to 80 ° and a specific surface area of 90 m ² / gr so that the active ingredient of permethrin is contained at 0.2%. With an average pore radius of 20 to 35 ° and a specific surface area of 1
80 m ² / gr diatomaceous earth having an average pore radius of 60 to 80
Å, pulverized coal having a specific surface area of 50 to 100 m ² / gr (these diatomaceous earth and pulverized coal are both JIS Z8801)
8mm sieve, JIS Z8801 1.5mm
Contains 50 wt% or more of the powdery particles remaining on the sieve. ) And
Except for using a mixture blended at a ratio of 5:65:30,
Same as Reference Example 2. The test results are shown in Tables 4 to 6 and 8 to 9.

Reference Example 4 The average pore radius is 20-40 ° and the specific surface area is 190-20.
0 m ² / gr diatomaceous earth (wakkanai siliceous shale), average pore radius of 5 to 20 °, specific surface area of 500 to 600 m ² / gr
Coal ((These diatomaceous earth and coal are both JIS
Z88018mm sieve, JIS Z8801
The powder contains 50 wt% or more of the particles remaining on the 2 mm sieve. ) Was used in the same manner as in Example 1 except that a mixture in which 50:50 was used was used. Table 4 to Table 6 show the test results.
And Tables 8 and 9.

Reference Example 5 Diatomaceous earth (wakkanai siliceous shale) having an average pore radius of 70 ° and a specific surface area of 100 m ² / gr, and an average pore radius of 35-60.
粉, pulverized coal having a specific surface area of 300 m ² / gr ((both diatomaceous earth and pulverized coal are JIS Z88018 mm
Containing 50 wt% or more of the powdery granules that passed through the sieve of No. JIS Z8801 and remained on a 0.5 mm sieve. ) And 20:
The same procedure as in Reference Example 2 was carried out except that the mixture blended at a ratio of 80 was air-permeable on one side, and one side was placed in a bag of a synthetic resin containing 1.0% of chlorpyrifos as an active ingredient. The test results are shown in Tables 4 to 6 and 8 to 9.

Reference Example 6 A substance obtained by adsorbing bifenthrin on pulverized coal having an average pore radius of 30 to 50 ° and a specific surface area of 500 m ² / gr so that the active ingredient of bifenthrin is contained at 0.05%. And a diatomaceous earth (wakkanai siliceous shale) having an average pore radius of 50 ° and a specific surface area of 60 m ² / gr (both are JIS Z880).
After passing through a 18 mm sieve, JIS Z8801 1 mm
Contains 50 wt% or more of the powdery particles remaining on the sieve. ), 7
The procedure was the same as in Example 1, except that a mixture blended at a ratio of 0:30 was used. The test results are shown in Tables 4 to 6 and 8 to 9.

Comparative Reference Example 2 Untreated chemical coconut shell activated carbon having a pore radius of 10 to 20 nm (JIS Z88018 mm passed through a sieve,
The same operation as in Reference Example 2 was carried out, except that the powdered coal remaining on the 88012 mm sieve was 50 wt% or more.
The test results are shown in Tables 4 to 5 and 7 to 9.

Comparative Reference Example 3 A non-drug treated sepiolite having an average pore radius of 10 to 15 nm (JIS Z88018 passed through a 8 mm sieve, and passed through a JIS sieve).
50% by weight of the powder and granules remaining on the Z8801 2mm sieve
% Or more. ) Was used alone, except that) was used alone. The test results are shown in Tables 4 to 5 and 7 to 9.

COMPARATIVE REFERENCE EXAMPLE 4 Activated carbon obtained by calcining pulp sludge without treatment (JIS Z8801; passed through an 8 mm sieve;
50% of the powdered coal remaining on the Z8801 2mm sieve
% Or more) was used alone, except that Reference Example 2 was used. The test results are shown in Tables 4 to 5 and 7 to 9.

[0032]

[Table 4]

[0033]

[Table 5]

[0034]

[Table 6]

[0035]

[Table 7]

[0036]

[Table 8]

[0037]

[Table 9]

Although the invention made by the inventor has been specifically described based on the embodiments, the present invention is not limited to the above-described embodiments, and can be variously modified without departing from the gist thereof. Needless to say,

[0039]

The effects obtained by the representative ones of the inventions disclosed in the present application will be briefly described as follows. That is, according to the present invention, not only the moisture absorption performance is high, but also by appropriately releasing moisture, the humidity under the floor can be adjusted to an appropriate state, preventing the occurrence of mold,
Prevent invasion and reproduction of harmful insects such as termites,
The effect of removing off-flavors generated under the floor is high, and the environment under the floor can be suitably preserved. It also prevents the capacity of the mixture on the film from deteriorating, balances the absorption and release of moisture, prevents the underfloor from falling into a high-humidity state, and constantly reduces the amount of water vapor in the closed underfloor space. Can be kept in a state. Further, it can be used to prevent the organic matter in the underfloor soil from being broken down.

 ──────────────────────────────────────────────────続 き Continuation of the front page (71) Applicant 392012397 Kemiholtz Co., Ltd. 194-1, Kamiyama-cho, Kuse-gun, Kyoto, Japan Newly opened Sayama small-sized area 194-1 (72) Inventor Shigeo Yoshida 1-1-4 Shinsenri Nishimachi, Toyonaka-shi, Osaka National Inside the Housing Industry Co., Ltd. (72) Inventor Midori Ishihara 1-1-4 Shinsenri-Nishimachi, Toyonaka City, Osaka Prefecture Inside the National Housing Industry Co., Ltd. No. 4 Inside the National Housing Industry Co., Ltd. (72) Inventor Kazumi Matsushita 1-4-1, Shinsenri Nishimachi, Toyonaka City, Osaka Prefecture Inside the National Housing Industry Co., Ltd. (2) Inventor Katsuhiro Tanaka 1515 Nakatsucho, Marugame City, Kagawa Prefecture Okura Industry Co., Ltd. The inner (72) inventor Katsusawa YoshiHisashi Itabashi-ku, Tokyo Itabashi 4-chome 13th No. 1 Oshika vibration Xing within Co., Ltd. (72) inventor Takanobu Saito Kyoto Prefecture Kuse District Kumiyama Oaza Sayama Sublocality new frontier 194-1 Kemihorutsu within Co., Ltd.

Claims (6)

[Claims] 1. A structure having a moisture permeability of 1000 under the floor of a building.
^{g / m 2 · 24hrs~20000g / m} 2 · 24hrs
Characterized by laying a film and / or non-woven fabric of the present invention, and laying a mixture of inorganic porous granules other than granulated coal and granulated coal on the film and / or non-woven fabric. Construction method. 2. The inorganic porous powder has an average pore radius of 20.
2. The method for maintaining an environment under a building floor according to claim 1, wherein the specific surface area is 20 to ²⁰⁰ m ² / gr. 3. The pulverized coal has an average pore radius of 1.5 to 100.
The method for maintaining an environment under a building floor according to claim 1, wherein the specific surface area is 50 to 600 m ² / gr. 4. The under-floor environment of a building according to claim 1, wherein the mixing ratio of the inorganic porous powder and the powdered coal is 20 to 80% by weight. Maintenance method. 5. The method according to claim 1, wherein 50% or more of the inorganic porous powder and the granular coal are pulverized particles that pass through a 19 mm sieve specified in JISZ8801 and remain on a 0.3 mm sieve. The method for maintaining an environment under a building floor according to claim 1, 2, 3, or 4. 6. An antiseptic, insect repellent, at least one of inorganic porous powder, powdered charcoal, film and / or non-woven fabric.
The termite-proof treatment has been performed, The claim 1, 2,
The method for maintaining an environment under a building floor according to 3, 4, or 5.