JP6545637B2 - Zeolite-containing hardened body and method for producing zeolite-containing hardened body - Google Patents

Description

  The present invention relates to a zeolite-containing hardened body and a method for producing a zeolite-containing hardened body.

In recent years, zeolite has attracted attention as a material having a deodorizing function.
Zeolites are known to have a high cation exchange capacity, for example, having a function to improve the soil retention ability of the soil by pouring them into the soil together with fertilizers.
Zeolite is a porous material, and is also known to adsorb gas such as ammonia, hydrogen sulfide and formaldehyde and have a function of deodorizing, absorbing or releasing water.
However, the zeolite has poor handleability in the powder state, and a technique for forming a hardened body without reducing the function of the zeolite is required.
For example, a method of producing a humidity control material for producing a humidity control material having a humidity control function and a strength similar to that of concrete by mixing natural zeolite, fly ash and an alkali silicate solution and solidifying at normal temperature is proposed. (See, for example, Patent Document 1).

JP, 2005-60175, A

However, the cured product produced by the method of producing a humidity control material described in Patent Document 1 has a certain degree of humidity control and strength. However, in the case of discarding after use, there are problems such as being hard and requiring energy for crushing, and being difficult to discard in soil as it is because it contains fly ash and the like.
An object of an embodiment of the present invention is to provide a zeolite-containing hardened body which can exhibit the good function of zeolite and which can be easily treated after use, and a zeolite-containing hardened body which can easily produce a zeolite-containing hardened body. It is about providing the manufacturing method of the body.

Means for solving the problems include the following embodiments.
<1> 10% by mass to 70% by mass with respect to the total amount of the hardened body of zeolite, 20% by mass to 50% by mass with respect to the total amount of hardened body with potassium silicate, and 10% by mass to 70% by mass of the blast furnace slag The zeolite containing hardened | cured material containing mass%.
The zeolite containing hardened | cured material as described in <1> which is an interior material for <2> buildings, an outer wall material, or a flowerpot.

The zeolite containing hardened | cured material as described in <1> which is a <3> planting pot.

<4> The zeolite is 10% by mass to 70% by mass with respect to the total solid content of the composition, the potassium silicate is 20% by mass to 50% by mass with respect to the total solid content of the composition, and the blast furnace slag is all The kneaded product obtained by adding and kneading water to a zeolite-containing composition containing 10% by mass to 70% by mass with respect to the solid content, and the kneaded product obtained in the above-mentioned kneading process is charged into a mold, cured and cured And a curing step.

  According to one embodiment of the present invention, a zeolite-containing hardened body which can exhibit the good function of zeolite and which can be easily treated after use, and a zeolite-containing hardened body which can easily produce a zeolite-containing hardened body It is possible to provide a method of manufacturing the body.

  Hereinafter, the present embodiment will be described in detail by way of more specific examples, but the present embodiment is not limited to the following description as long as it does not contradict the purpose of the present embodiment.

[Zeolite-containing hardened body]
The zeolite-containing hardened body of the present embodiment comprises 10% by mass to 70% by mass of the zeolite with respect to the whole hardened body, 20% by mass to 50% by mass of the potassium silicate with respect to the whole hardened body, and And 10% by mass to 70% by mass.
Hereinafter, the component which the zeolite containing hardened | cured material of this embodiment can contain is demonstrated.

<Zeolite>
The zeolite-containing cured product of the present embodiment (hereinafter sometimes simply referred to as "cured product") contains zeolite.
Zeolite is an aluminosilicate compound and has voids in its crystal structure. In addition, due to the characteristic that the entire crystal lattice is negatively charged by replacing a part of the aluminum with a framework based on silicon dioxide, the space such as sodium contains cations such as sodium to balance the charge. ing. For this reason, since ion exchange and adsorption occur in the pores and in the aqueous solution by contacting with an aqueous solution containing a cation other than sodium, it has an ion exchange ability.
This ion exchange reaction is reversible and may saturate and equilibrate over time. Zeolites having the functions as described above are used as adsorption materials, ion exchange materials, dehydration of organic solvents, humidity control materials, soil conditioners and the like.

There is no particular limitation on the zeolite that can be used in the present embodiment, and it may be a natural product or an artificially synthesized artificial product.
For example, zeolites described as artificial zeolite and natural zeolite in paragraph Nos. [0018] to [0019] of JP-A-2005-60175 are suitably used in the present embodiment.
There is no restriction | limiting in particular in the particle size of a zeolite, According to the objective, it selects suitably. Zeolites have various particle sizes from the mm order to the μm order and the nm order, depending on the purpose of use.
From the viewpoint of uniformity of the cured product, it is preferable to include zeolite having a particle size of 2 mm or less. The particle size of the zeolite can be appropriately selected and used according to the purpose of the cured product.
For example, when the particle size of the zeolite is 2 mm or less, the production of a dense cured product can be expected. The particle size of zeolite can be reduced to micron, nano, pico or the like. In this embodiment, a micron-order or nanometer-order zeolite that is a particle size of a general zeolite product is used. However, as described above, the particle size of the zeolite used is not particularly limited.
Moreover, it is also preferable to contain 2 or more types of zeolite of a mutually different particle size from a viewpoint of forming a more precise | minute hardened | cured material.
The zeolite may be a commercially available product, and examples of the commercially available product include Zeolite SGW series manufactured by Zekrite Co., Ltd., Zeolite Z series (all trade names), and the like. Zeolites that can be used are not limited to the zeolite products described above, and any commercially available zeolite products can be used in the cured product of this embodiment.

Content of the zeolite with respect to the hardened | cured material whole quantity of this embodiment can be suitably selected according to the purpose of use of hardened | cured material in the range of 30 mass%-70 mass%. If the content of zeolite with respect to the total amount of the hardened body is less than 30% by mass, the solid content of the hardened body is lowered and the shape is maintained for a long time, for example, measures such as increasing the content of blast furnace slag are required. There is. When the content of zeolite exceeds 70% by mass, the cured product may become brittle.
It is preferable that content of a zeolite is 40 mass%-60 mass% with respect to hardened | cured material whole quantity.

<Potassium silicate>
The cured product of the present embodiment contains 20% by mass to 50% by mass of potassium silicate with respect to the total amount of the cured product.
When the content of potassium silicate is in the above range, the strength and the durability of the cured product are further improved.
When the content of potassium silicate is less than 20% by mass, the resulting cured product may not be able to achieve practically sufficient strength.
The cured product can also contain potassium silicate in an amount of more than 50% by mass. However, potassium silicate is relatively expensive among the constituents of the cured product, and considering the improvement of the effect by containing it in an amount of more than 50% by mass, the cost-effectiveness of the cured product is considered to be high Since it can not be said, in the hardened | cured material of this embodiment, the upper limit of content is prescribed | regulated as 50 mass%.
The content of potassium silicate is preferably 20% by mass to 40% by mass.

Potassium silicate is a silicate of potassium and is an inorganic compound represented by the chemical formula K ₂ SiO ₃ . Potassium silicate is known as a water-glass-like substance, and is used for building materials, detergents, fertilizers and the like.
Potassium silicate is used as a binder in the water glass state to harden the powder such as zeolite and maintain the shape of the formed body. Similarly, sodium silicate is known as one that functions as a binder in the water glass state, but in the present embodiment, sodium silicate is concerned with the influence on the soil at the time of disposal. Select and use potassium.
Potassium silicate is easy to handle and is readily available as a commercial product.

<Brusher slag>
The hardening body of this embodiment contains 10 mass%-70 mass% of blast furnace slag with respect to hardening body whole quantity. The content of blast furnace slag is preferably 20% by mass to 40% by mass.
When the hardened body of the present embodiment contains the blast furnace slag at the above-mentioned content, the strength of the hardened body is improved.
Blast furnace slag is mainly composed of SiO ₂ · CaO · Al ₂ O ₃ and, in a blast furnace producing molten pig iron, components other than iron contained in iron ore and ash in limestone and coke as a secondary material It is a by-product discharged at the time of manufacture of pig iron which is melted and separated and recovered in the molten state at 1500 ° C.
Since blast furnace slag is amorphous and contains a base such as lime or earth in its structure, the binding strength of silicic acid is weak. For example, it is easy to contact thin acid in soil. Have the property of dissolving in
For this reason, blast-furnace slag is generally used as a soil improvement material for the purpose of making the soil of a paddy field, supplying an alkali component to the soil, supplying a silicic acid, etc. In addition, it is used as a keikal fertilizer (mineral siliceous fertilizer).
When the content of the blast furnace slag is in the above range, an effect of improving strength, which is an effect of causing the hardened body to contain the blast furnace slag, is obtained.

When the hardened | cured material of this embodiment contains blast furnace slag, the content ratio of zeolite, potassium silicate and blast furnace slag (zeolite: potassium silicate: blast furnace slag) is 10-60: 20-50: 10 by mass ratio. It is 70, and it is preferable that it is 30-60: 20-40: 20-40.
The content ratio of zeolite, potassium silicate and blast furnace slag is, for example, zeolite: potassium silicate: blast furnace slag = [50: 25: 25], [50: 40: 10], [50: 30: 20], [50 : 35: 15], [40: 40: 20], [40:30:30], and the like.

<Other ingredients>
In addition to zeolite, potassium silicate, and optionally contained blast furnace slag, the cured product of the present embodiment can contain other components as needed as long as the effects of the present embodiment are not impaired.
Other components include surfactants, binders other than potassium silicate, biodegradable resins, and the like. Moreover, the various components for providing design property, for example, a coloring agent, a filler, etc. can also be contained.
Moreover, in the case of manufacture of hardened | cured material, hardening compositions, such as a concrete composition etc., are set as hardening agents, such as potassium sulfate, calcium sulfate, magnesium sulfate, potassium nitrate, calcium nitrate, magnesium nitrate, magnesium phosphate, magnesium acetate etc. Known curing accelerators and other additives which are usually used for the above can be used appropriately. For example, by using a curing accelerator in a composition for producing a cured product, a cured product with higher strength can be obtained in a shorter time.

[Method for Producing Zeolite-Containing Hardened Material]
It is preferable that the zeolite containing hardened | cured material of this embodiment is manufactured by the manufacturing method shown below.
In the method for producing a zeolite-containing cured product according to this embodiment, the zeolite is 30% by mass to 70% by mass with respect to the total solids of the composition, and the potassium silicate is 20% by mass to 50% by mass with respect to the total solids of the composition. Mixing step of adding water to a zeolite-containing composition containing 0% by mass and 0% by mass to 70% by mass of blast furnace slag with respect to the total solid content of the composition, and the above-mentioned zeolite-containing And a curing step of charging the kneaded product of the composition and water into a mold, curing and curing.
Hereinafter, the manufacturing method of the hardening body of this embodiment is demonstrated to process order.

<Kneading process>
In this step, water is added to a zeolite-containing composition containing a predetermined amount of zeolite, potassium silicate, blast furnace slag, and an additive optionally contained, and the mixture is kneaded to prepare a kneaded material. There is no particular limitation on the order of addition of each component when preparing the kneaded material. From the viewpoint of uniform mixing, a mixture of a previously prepared aqueous solution of potassium silicate and blast furnace slag may be added to the zeolite and kneaded, and then the required amount of various additives may be added and further kneaded. preferable.
Kneading can be carried out at normal temperature (25 ° C.).
There is no particular limitation on the kneading means, and known stirring devices, mixing devices and the like can be used appropriately. If the amount of the zeolite-containing composition to be used is small, kneading may be performed manually using a spatula or the like in the container.
In addition, since the powder component such as zeolite and the aqueous solution of potassium silicate functioning as a binder are uniformly mixed when the mixture is sufficiently kneaded, and the viscosity of the mixture is increased, a stirrer capable of giving high shear force, mixing It is also possible to select and use an apparatus or the like.
Kneading may be completed when the viscosity of the kneaded material becomes high and it becomes like clay. With a state like clay, for example, when the kneaded material is leveled and pressed with a hand, a state in which the shape of the bill is maintained for one minute or more can be used as a standard.

<Cure curing process>
In this step, the clay-like kneaded material prepared in the previous step is put into a mold suitable for the purpose, cured and cured.
The form is selected according to the shape of the cured body.
When making a hardening body into a hardening body, such as tile shape and a board shape, a flat form may be mentioned, for example. The kneaded material is placed in a plate-like mold, leveled and then cured and cured. After being introduced into the mold, tapping, degassing or the like may be performed for the purpose of removing air bubbles in the kneaded material. In order to make the film thickness of the kneaded material uniform, tapping or pressing a plate on the surface may be carried out to even out the surface.
When the cured product is, for example, a cured product having a three-dimensional shape such as a flower pot, a planter, or a plant pot, the kneaded material is introduced into a pair of concave and convex molds, for example, a molding die and pressurized. It can be molded. A mold release treatment may be performed on the surface of the mold in order to suppress adhesion of the molded kneaded product and improve mold release.

The molded kneaded product is cured to obtain a cured product. Curing may be appropriately performed according to the purpose of use of the cured product and the required strength, depending on known curing of the cured concrete product.
As curing, wet curing may be performed at normal temperature (25 ° C.) while controlling humidity, or thermal curing may be performed by heating to about 30 ° C. to 70 ° C. in a constant temperature room, heating in an autoclave The autoclave may be pressurized and autoclaved.
In the curing step, after the cured product is sufficiently cured, the zeolite-containing cured product of the present embodiment can be obtained by removing it from the mold.

  The cured product of this embodiment is at least one of the type and content of zeolite in the composition forming the cured product, the content of potassium silicate, and the type and content of blast furnace slag and other additives optionally contained. By controlling the strength of the resulting cured product can be controlled.

  When the cured product of the present embodiment is applied to applications requiring strength and durability, such as interior materials for buildings, outer wall materials, or flowerpots, for example, the total amount of the cured product in the production of the cured product By taking measures such as lowering the content of zeolite with respect to the above, reducing the particle size of the zeolite to be used, etc., it is possible to obtain a hardened body having good strength and durability.

Also, when the cured product is applied to uses such as planting pots that do not require durability, for example, the content ratio of zeolite to potassium silicate functioning as a binder can be further increased, or particles of zeolite used The diameter can be increased, or the like can be taken.
Thus, when the hardened body is embedded in the soil by increasing the content ratio of so-called "aggregate" such as zeolite in the hardened body, the binding of the aggregates weakens due to the water contained in the soil, and aging over time It can be set as a hardened body which can be decomposed in the soil.

<Use of hardened body>
The cured product of the present embodiment is configured as described above, and thus can be applied to various fields.
For example, the cured product of the present embodiment is suitably used for tiles, panels, boards, blocks, floor coverings, roofing materials for roofs, and the like used for interior and exterior materials of buildings. In addition, it can be used for dirty stones such as dirty stones for toilets, covers of lighting fixtures, containers, flower pots and the like.
Moreover, it can also be used for a ceramic container, a ceramic knife, etc.

Among them, the cured product of the present embodiment is suitable for an interior material for a building, an outer wall material, and the like because it has moisture conditioning and deodorizing properties due to the function of zeolite contained in the cured product.
Moreover, since the zeolite contained in the hardened material is a component that can be used as an agricultural material such as a soil conditioner, and the blast furnace slag and potassium silicate are components that can also be used as a fertilizer, the hardened material of this embodiment By applying the body to a flowerpot, a planter, a plant pot, etc., the amount of fertilizer used can be reduced. Furthermore, because of the properties of zeolite, it has good breathability, can adsorb harmful substances, and is easy to control moisture, so the cured product of this embodiment is a flowerpot that has favorable conditions for plant growth, for horticulture It is also useful as a planter, a plant pot, etc.

  For example, the planting pot of the present embodiment is embedded in the soil, and the shape of the cured body degrades with time. Therefore, after being buried in the soil and aging, it has the advantage that the shape of the plant pot collapses and does not prevent the growth of plant roots. When the cured product of this embodiment is used as a plant pot, not only can seedlings of horticultural plants, crops, etc. be planted on each plant pot, flower bed, field, etc., but also the components contained in the cured product itself It is useful for plant growth because it exhibits functions as a soil conditioner and fertilizer.

Other than planting pots, this embodiment does not require durability, and can be disassembled with time by disposing in the soil, so that it can be easily discarded, for example, a temporary enclosure block, board, etc. A cured product can be suitably used.
Zeolite is a component that can also be used as a soil conditioner or the like, and potassium silicate and blast furnace slag are both components that can be used as a fertilizer, so the hardened body of this embodiment should be discarded as it is after use. Can.

  EXAMPLES Hereinafter, the present invention will be more specifically described by way of examples, but the present invention is not limited to these examples.

Example 1
<Preparation of Zeolite-Containing Composition>
A mixture containing a zeolite-containing composition containing the following components (1) to (3) and (4) water was prepared.
(1) Zeolite (Itaya. Zeolite Super Z (trade name) average particle diameter: 2 mm or less, manufactured by Zekrite Co., Ltd.) 480 g
(2) Blast furnace slag (made by JFE Steel Corporation) 240 g
(3) 240 g of potassium silicate (manufactured by Fuji Chemical Co., Ltd.)
(4) Water 240 g

  First, (3) potassium silicate is dissolved in (4) water to prepare a 50% by mass potassium silicate aqueous solution, and (1) the obtained aqueous solution is added to zeolite (super Z) to form a paste It knead | mixed until it further, (2) blast furnace slag was added and fully knead | mixed, and the kneaded material was prepared.

<Formation of hardened body>
The obtained kneaded product is put into a 70 mm × 45 mm bat, the surface is evened, the thickness is 5 mm, and the whole bat is aged for 1 hour in a thermostat of 60 ° C. 60% RH, and a tile-shaped hardened body I got
The tile-shaped cured product was white and was excellent in appearance.

The obtained tile-shaped cured product of Example 1 was suspended by gripping both ends on the short side with clips, but no deformation or breakage was observed. Also, both ends of the long side were held by hand and bending stress was applied with both hands, but they did not deform.
As described above, the tile-shaped cured product of Example 1 had good shape retention and good appearance. In addition, a hardened body is obtained using zeolite, blast furnace slag, potassium silicate and water, and the zeolite contained in the hardened body is a component used as an agricultural material such as a soil conditioner, blast furnace slag and potassium silicate Since all of these are components used as fertilizers, there is no concern of contaminating the soil even if the hardened body is disposed of in the soil after use. In addition, since the fertilizer effect by blast furnace slag and potassium silicate is delayed, the soil balance and its ecosystem are considered to the maximum extent.
Moreover, it can be expected that the hardened | cured material of this embodiment exhibits the favorable function which the zeolite contained in a hardened | cured material has.

Claims (4)

10% by mass to 70% by mass of the zeolite with respect to the total amount of the hardened body, 20% by mass to 50% by mass of the potassium silicate with respect to the total amount of hardened body, and 10% by mass to 70% by mass with the blast furnace slag , only including, flower pots, gardening planters, or zeolite-containing cured material is Ueki pot. 10% by mass to 70% by mass of the zeolite with respect to the total amount of the hardened body, 20% by mass to 50% by mass of the potassium silicate with respect to the total amount of hardened body, and 10% by mass to 70% by mass with the blast furnace slag And a zeolite-containing hardened body which is a temporary enclosure block or board which can be decomposed over time by being disposed in the soil.   The zeolite-containing cure according to claim 1 or 2, wherein the content ratio of zeolite, potassium silicate and blast furnace slag in the zeolite-containing cured product is 10 to 60:20 to 50:10 to 70 in mass ratio. body. 10% by mass to 70% by mass of the zeolite with respect to the total amount of hardened body, 20% by mass to 50% by mass of the potassium silicate with respect to the total amount of hardened body, and 10% by mass to 70% by mass of the blast furnace slag A kneading step of adding water to a zeolite-containing composition containing% by mass, and kneading, and a curing step of charging the kneaded product obtained in the kneading step into a mold, curing it and curing it,
The manufacturing method of the zeolite containing hardened | cured material of any one of Claims 1-3 which contains these.