JPH0919916A - Inorganic molded product - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an inorganic molded product which is free from elution of alkali, high in strength, and rich in durability by a method wherein π-water is added to a mixture of cement and soil, which is kneaded, and molded in a specific shape to be cured. SOLUTION: For example, based on 100 pts.wt. of portland cement, 500 pts.wt. of soil and 50 pts.wt. of lime are mixed. To the mixture 300 pts.wt. of dilute solution wherein an undiluted solution of π-water is diluted 1000 times is added, and kneaded. The kneaded material is casted into a molding tool, and cured. After curing, the product is taken out from the mold. Further, natural curing is carried out for three days to manufacture a block 2. Herein, the π- water is water containing iron ion. For example, ferrous salt is charged into a great amount of strong acid aqueous solution. After dissolving it by agitation, generated insoluble material is filtered. Powder obtained by drying the filtrate is repetitively extracted and dried with alcohol-water-mixture solvent. The iron salt obtained is dissolved to manufacture the π-water.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inorganic molded article used for civil engineering building materials, building frames and the like.

[0002]

2. Description of the Related Art Cement-based moldings are used for conventional civil engineering and building materials, building structures, etc., mainly by adding water to a mixture of cement and aggregate, kneading, molding into a predetermined shape and curing. It was

[0003]

However, in the above-mentioned conventional cement-based molded article, the alkali in the cement is eluted over time and the strength is deteriorated, or when it is used in a fish tank, the dissolved alkali is dissolved. There was a problem that the fish would die.

[0004]

[Means for Solving the Problems] As a means for solving the above-mentioned conventional problems, the present invention is an inorganic material obtained by adding π-water to a mixture of cement and soil, kneading the mixture, molding it into a predetermined shape and curing it. A molded article is provided.

As an example of the cement used in the present invention,
Examples include portland cement, jet cement, blast furnace slag cement, fly ash cement, alumina cement and the like, or a mixture of two or more thereof.

The above-mentioned cement is mixed with soil, but the mixing ratio is usually 30 parts of soil to 100 parts by weight of the cement.
0 to 700 parts by weight, preferably 400 to 600 parts by weight is added.

If desired, further lime and / or carbon powder is added to the mixture of cement and soil. Lime is usually 5 per 100 parts by weight of the mixture of cement and soil.
10 to 10 parts by weight, and the charcoal powder is usually added to 30 to 70 parts by weight based on 100 parts by weight of the above mixture.

Π-Water is added to the mixture of cement and soil or the mixture of cement, soil and lime and / or carbon powder. Here, π water is water containing iron ions, and is special water produced by the following two methods. 1. The ferrous salt is poured into a large amount of an aqueous solution of a strong acid and dissolved by stirring.The resulting insoluble substance is filtered off, and the filtrate is dried.The powder obtained is repeatedly extracted and dried with an alcohol-water mixed solvent to obtain a powder. Dissolve the iron salt obtained in water. 2. The trivalent iron salt was put into a large amount of an aqueous alkali solution and dissolved by stirring.The resulting insoluble material was separated by filtration, the filtrate was neutralized with hydrochloric acid, and the filtrate was dried.The powder obtained was dried with an alcohol-water mixed solvent. The iron salt obtained by repeating extraction and drying is dissolved in water. In the present invention, the raw water of π-water usually produced by the above production method is diluted 500 to 1500 times and the diluted solution is added to the mixture containing cement and soil. The addition amount of the diluted solution varies depending on the molding method. For example, in the case of extrusion molding, it is usually 60 to 12 with respect to 100 parts by weight of the above mixture.
0 parts by weight, and in the case of cast molding, it is usually about 100 to 200 parts by weight with respect to 100 parts by weight of the above mixture.

The kneaded product obtained by adding π-water to the above mixture and kneading is molded into an inorganic molded product by extrusion molding in which it is extruded by an extruder, cast molding in which it is cast into a molding die and cured. After molding, the molded product is completely cured by natural curing or heat curing.

[0010]

The π-water used in the present invention is considered to have an action of suppressing dissociation of the electrolyte. Therefore, when the π water is added to a mixture containing cement and soil or a mixture containing cement, soil and lime and / or carbon powder, dissociation of the electrolyte contained in the mixture is suppressed,
The elution of alkali is blocked.

[0011]

【Example】

[Example 1] (Production of π-water) 1.0 mg of ferric chloride was added to 100 ml of 0.5N caustic soda aqueous solution, and the mixture was stirred and dissolved, and then left standing overnight. The resulting insoluble substance is filtered off, the filtrate is neutralized with hydrochloric acid, concentrated under reduced pressure, and dried and crystallized in a desiccator. 50 ml of an 80% aqueous solution of isopropyl alcohol is further added to the obtained crystals, and the eluted components are collected, concentrated under reduced pressure to remove the solvent and dried. The above extraction-concentration-drying operation is repeated several times to obtain 0.25 mg of crystals. The crystals are treated with 3 g of sodium chloride to give the active substance. This active substance was dissolved in 1 liter of water, and 10 g of ferric chloride was added thereto, and the mixture was further diluted 1000 times to obtain a stock solution.

[Example 2] (Production of π-water) 1.0 g of ferrous sulfate was put in 5 ml of 12N hydrochloric acid, and after stirring, the insoluble substance was filtered off. The filtrate is concentrated under reduced pressure after adding 0.1 g of sodium chloride. Next, 10 ml of methyl alcohol is added, and the extracted portion is collected and dried and crystallized in a desiccator. The crystals obtained are washed with a small amount of pyricine and then taken up in 10 ml of ethyl alcohol to give 10.6 mg of finely crystalline active substance. The crystals were dissolved in 1 liter of water, 10 g of ferric chloride was added thereto, and the mixture was further diluted 1000 times to prepare a stock solution.

[Example 3] (Production of block) 500 parts by weight of soil and 50 parts by weight of lime were mixed with 100 parts by weight of Portland cement, and the mixture was mixed 1000 times with the stock solution of π-water produced in Example 1. 300 parts by weight of the diluted solution was added and kneaded, and the kneaded product was cast into a mold and cured, and after curing, the mold was removed and natural curing was performed for another 3 days to obtain a block as shown in FIG. (2) is manufactured. When the block (2) was immersed in water having a pH of 6.8 and allowed to stand for 1 week, the pH was about 7.0 and elution of alkali was not observed. For the breaking strength test, the kneaded product was cast into a molding die to prepare a cylindrical sample having a diameter of 10 cm and a height of 20 cm, and the sample was left for one week after being cured and then subjected to a breaking test. The breaking strength was 118 kg. Met. The above block
(2) were stacked and bonded with a mortar adhesive to prepare a water tank (1) as shown in FIG. When carp was bred by filling the aquarium (1) with water, the carp grew smoothly without any harm due to alkali elution.

[Comparative Example 1] When the block produced without using π-water in Example 3 was immersed in water having a pH of 6.8 and allowed to stand for 1 week, the pH increased to about 10.5 and the alkali was eluted. Admitted. Further, as a result of performing a destructive test similar to that in Example 3, the fracture strength of the cylindrical sample was 10
kg.

[Embodiment 4] (Construction of building frame wall) 450 parts of soil to 100 parts by weight of fly ash cement
Parts by weight, 60 parts by weight of lime, and 50 parts by weight of carbon powder are mixed, and 800 of the π-water stock solution produced in Example 2 is added to the mixture.
Add 300 parts by weight of double-diluted solution and knead. Insert the rebar (5) into the mold (4) formed by plywood for concrete panel (3, 3) as shown in Fig. 3, and insert the mold (4 Pour the above kneaded product into the mixture. When the kneaded product is hardened, the plywood (3, 3) is removed and the mold is removed to construct a skeleton wall (6) as shown in FIG.
The skeleton wall (6) constructed in this way has high strength,
In addition, the embedded reinforcing bar (5) does not rust for a long period of time, and has extremely high strength and durability. In the room surrounded by such a body wall (6), odors and cigarette smoke can be quickly adsorbed and removed to maintain a clean atmosphere.

[0016]

INDUSTRIAL APPLICABILITY The present invention provides a high-strength and highly durable inorganic molded product without alkali elution, and the inorganic molded product is useful for civil engineering and building materials such as blocks and panels, and building frame walls.

[Brief description of the drawings]

 1 and 2 relate to the third embodiment.

FIG. 1 is a perspective view of a block.

FIG. 2 is a perspective view of a water tank. FIGS. 3 and 4 relate to a fourth embodiment.

FIG. 3 is a partial perspective view of a mold.

FIG. 4 is a partial perspective view of a skeleton wall.

[Explanation of symbols]

 1 Aquarium 2 Block 6 Body wall

Continuation of front page (51) Int.Cl. ⁶ Identification code Office reference number FI technical display area C04B 111: 00

Claims (2)

[Claims] 1. An inorganic molded article, characterized in that π-water is added to a mixture of cement and soil, kneaded, molded into a predetermined shape and cured. 2. The inorganic molded product according to claim 1, wherein lime and / or carbon powder is further added to the mixture of cement and soil.