JP2007176758A - Solidified product of crushed stone fine powder and method for solidifying the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a technique for effectively utilizing unused crushed stone fine powders which are discharged in a large amount at a quarry and the like, and easily manufacturing various solidified products with low alkalinity. <P>SOLUTION: A method for solidifying a solidified product of crushed stone fine powders is provided in which normal portland cement and magnesium hydroxide or volcanic glass fine powders are added to the crushed stone fine powders, water is then added thereto and the resulting mixture is kneaded, and then molded and cured to solidify the crushed stone fine powders, or in which waste glass fine powders are added to the crushed stone fine powders, and the mixture is then fired at a temperature in a range of 800 to 1,000°C to solidify the crushed stone fine powders, wherein organic powders such as crushed bamboo fine powders, sawdusts and hull powders are mixed within a range of 2 to 5% by mass and solidified, and bentonite is further added thereto, water is then added and the resulting mixture is kneaded, molded, dried and then fired to solidify the crushed stone fine powders. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a solidified body of fine crushed stone powder and its solidification technology for effectively utilizing the fine powder of crushed stone discharged from the mining, crushing, construction and civil engineering waste materials, and the particle size adjustment process.

  Most of the crushed stone fine powder discharged from the mining and crushing of crushed stone, construction and civil engineering waste, and the particle size adjustment process are landfilled in the mining site because of their low utility value. In terms of effective use, some of them are used as roadbed materials, but most of them are discarded due to the large amount generated. Therefore, there is almost no effective use at present.

  Various methods for solidifying and using these discharged crushed materials and the like have been proposed as a method of effective use. Generally, a method using ordinary Portland cement is known as a solidification method. The aggregate / cement ratio is generally 7: 3. In this case, the pH of the solidified body is a strong alkali of about 12, and is often restricted when used, and there is a problem in terms of effective use. When the amount of cement is lowered to lower the pH, the conventional strength is lowered, and in this case as well, there are many restrictions in using the same as described above, and there is a problem in terms of effective utilization.

  On the other hand, a technique for adding a foaming agent SiC to a raw material having a chemical composition similar to fine crushed stone powder and firing it to produce a lightweight aggregate for concrete (see, for example, Patent Document 1) is known. Further, a technique for manufacturing a building material by firing after adding an inorganic solidifying agent made of strong acid salt of aluminum, lime, and cement to incinerated ash, crushed stone powder, etc. is known (see, for example, Patent Document 2). .

  On the other hand, in the technology including magnesium hydroxide, a technology is known in which blast furnace slag fine powder and alkaline inorganic substance are mixed in water, solidified, dehydrated, dried and pulverized to obtain humidity-controlling inorganic powder. (See, for example, Patent Document 3). Furthermore, as a foaming agent for raw materials such as crushed stone powder or sludge, hydrogen peroxide and water are used, solidification using cement, wood powder is used as a pore aid, glass fine powder or silica as a sintering aid A technique of adding powder and baking at high temperature and solidifying is known as a method for producing a foam (see, for example, Patent Document 4).

JP 2000-226242 A Japanese Patent Laid-Open No. 08-318581 JP 2004-175601 A Japanese Patent Laid-Open No. 08-318581

  As an aggregate in the form of utilization such as crushed stone, the utilization method of solids has been studied, and various forms of use have been developed and proposed. However, in the present situation, the utilization method including the disposal is not established in the powder form from which the solid matter is removed. The present invention pays attention to the powdered material and is a technique for solving the conventional problems by solidifying. In the solidification technique, one end of the technique has been disclosed as in the above example.

  However, the conventional technology and the disclosed technology are not completed and still have many problems. Explaining an example of the disclosed technology, the technology disclosed in Patent Document 1 is economically problematic because it is necessary to add an expensive foaming agent SiC, and a firing temperature of 1000 ° C. or more is necessary. It has some problems. Moreover, although the technique disclosed in Patent Document 2 is to add an inorganic solidifying material, there is a problem in that it needs to be poured and fired after demolding, and its application is limited.

  The technique of Patent Document 3 discloses only that magnesium hydroxide is solidified as an alkali inorganic substance, and lacks means for realizing the effect of magnesium hydroxide. The technology of Patent Document 4 discloses that a molded product is fired at a high temperature by adding fine glass powder, but is used as a firing aid mixed with other substances, foaming agent, hydrogen peroxide, water and wood. It is for foam production. Also, it is fired from casting and is not cured to obtain the desired solidified body. Further, it is not a manufacturing method used by mixing magnesium hydroxide with fine crushed stone powder.

  As described above, all of the above-mentioned techniques are related to the solidification technique. In particular, in terms of solidifying fine powders, for example, the degree of alkalinity is low and the density is increased. It is not. The present invention has been made under the background of such a conventional technique, and in particular, is a technique for easily producing various solidified bodies by combining unused resources, and achieves the following object.

  An object of the present invention is to provide a solidified body of fine crushed stone powder solidified by reducing the alkalinity and increasing the proportion of fine crushed stone powder while maintaining compressive strength, and a solidification technique thereof. Another object of the present invention is to provide a solidified body of fine crushed stone powder having high humidity control, high density, and solidified by improving water absorption, and solidification technology thereof. Still another object of the present invention is to provide a solidified powder of fine crushed stone powder that can be solidified in a simple production form and a solidification technique thereof.

  As a result of intensive studies to solve the problems of the prior art described above, the present inventors have formulated magnesium hydroxide or glass fine powder, particularly volcanic glass fine powder, together with ordinary portland cement, in fine crushed stone powder. The object was achieved by solidification. Moreover, the objective was achieved by mix | blending glass fine powder, especially waste glass fine powder with crushed stone fine powder, and baking and solidifying after that.

  The purpose was achieved by blending bentonite as necessary, adding water, kneading, shaping, drying, and then baking to solidify. Furthermore, it was found that the purpose can be achieved by blending organic powders such as bamboo pulverized fine powder, sawdust, rice husk powder, etc., adding water, kneading, shaping, drying, then firing and solidifying. Based on this, the present invention has been completed. The crushed stone fine powder targeted by the present invention is a fine powder generated from industrial waste such as soil, earth and sand, construction materials, as well as raw stone, regardless of whether it is a natural product or an industrial product such as industrial waste. The particle size of the target fine powder is preferably 1.2 mm or less. Next, the means of the present invention will be described.

  The solidified powder of fine crushed stone powder according to the first aspect of the present invention comprises ordinary Portland cement and magnesium hydroxide adjusted to have a mass ratio of 1.0: 1.0 to 1.0: 0.5, respectively. The mixture is added and blended, water is added and kneaded, molded, cured and solidified, and it can be solidified only by curing.

  The solidified powder of fine crushed stone powder according to the second aspect of the present invention comprises finely divided fine powder of ordinary Portland cement and fine volcanic glass whose mass ratio is adjusted within the range of 1.0: 1.0 to 1.0: 0.5. It is characterized by being added and blended with a powder mixture, kneaded with water, molded, cured and solidified.

  The solidified crushed stone powder of the present invention 3 is characterized in that, in the present inventions 1 and 2, the mixture is adjusted in a range of 5 to 30% by mass with respect to the total mass of the blended blend. And

  The solidified powder of fine crushed stone powder according to the present invention 4 is characterized in that, in the present invention 2, the particle size of the glass fine powder is 45 μm or less.

  The solidified crushed stone fine powder of the present invention 5 is a mixture of crushed stone fine powder and waste glass fine powder, the amount of the crushed stone fine powder is adjusted within the range of 10 to 80% by mass of the mixture, and the glass fine powder The amount of is adjusted to be within the range of 20 to 90% by mass of the mixture and mixed, the mixture is molded, fired within the temperature range of 800 to 1000 ° C. and solidified. .

  The solidified crushed stone powder according to the sixth aspect of the present invention includes ordinary Portland cement and magnesium hydroxide, each of which is adjusted to have a mass ratio of 1.0: 1.0 to 1.0: 0.5. It is characterized by adding water to the mixture, kneading the mixture with water, molding the kneaded mixture, curing the molded composition, and solidifying only by curing. It is characterized by being able to do it.

  The solidification method of the crushed stone fine powder of the present invention 7 includes the ordinary Portland cement and the volcanic glass fine powder adjusted to the crushed stone fine powder within a mass ratio of 1.0: 1.0 to 1.0: 0.5, respectively. It is characterized in that a mixture of powders is added to form a blend, water is added to the blend and kneaded, the blended blend is molded, and the molded blend is cured and solidified.

  The solidified crushed stone powder of the present invention 8 is characterized in that, in the present inventions 6 and 7, the mixture is adjusted in a range of 5 to 30% by mass with respect to the total mass of the blended blend. And

  The solidified crushed stone powder of the present invention 9 is characterized in that, in the present invention 7, the volcanic glass fine powder has a particle size of 45 μm or less.

  The solidification method of the crushed stone fine powder of this invention 10 adjusts the quantity of the said crushed stone fine powder in the range of 10-80 mass% of the said mixture in the mixture of the crushed stone fine powder and waste glass fine powder, The said glass fine powder Adjusting the amount of the mixture within the range of 20 to 90% by mass of the mixture, forming the mixture, firing the formed mixture within the temperature range of 800 to 1000 ° C., and solidifying the mixture. Features.

  The solidified crushed stone powder according to the eleventh aspect of the present invention is the blended composition according to the tenth aspect of the present invention, wherein one or more organic powders selected from bamboo pulverized fine powder, sawdust and rice husk powder are added to the mixture within a range of 2 to 5% by mass. It is characterized by solidifying as a product.

  The crushed stone fine powder solidification method of the present invention 12 is the method of the present invention 10, wherein bentonite is added to the mixture to form a blend, water is added to the blend and kneaded, and the blended blend is molded, and this molding is performed. The dried blend is dried, and the dried blend is baked to solidify.

  The method for solidifying fine crushed stone powder according to the thirteenth aspect of the present invention is the method according to the twelfth aspect of the present invention, wherein one or more organic powders selected from finely ground bamboo powder, sawdust, and rice husk powder are added to the blend within a range of 2 to 5% by mass. It is characterized by solidifying as a blend.

  Next, preferred means of the present invention will be described. It is preferable to adjust the blending amount of ordinary Portland cement in the blends shown in the present inventions 1 to 4 and 6 to 9 within a range of more than 5% by weight and 30% by weight based on the total mass of the raw material components. . The blending amount of the crushed stone fine powder shown in Invention 5 and Inventions 10 to 13 is in the range of 10 to 50% by mass based on the total mass, and the blending amount of the waste glass fine powder is 50 to 90% by mass based on the total mass. It is preferable to adjust within the range, and to adjust the firing temperature within the range of 850 to 950 ° C.

  The raw material of the solidified powder of fine crushed stone obtained by the present invention is based on organic powder such as Portland cement, magnesium hydroxide, volcanic glass fine powder, finely ground bamboo powder, sawdust, rice husk powder, bentonite, etc. It consists of at least two selected.

  The crushed stone fine powder is discharged in a large amount from crushed stone mining, crushing, construction / civil engineering site, particle size adjustment process, etc., and the particle size is preferably 2.5 mm or less, and more preferably 1.2 mm or less.

  In the present invention, the glass fine powder is preferably a volcanic glass fine powder, and the particle size is preferably 45 μm or less. Volcanic glass is used as a pesticide carrier. Since the fine powder is scattered when agrochemicals are sprayed, those having a particle size of 10 μm or more are used, and those having a particle size of 10 μm or less are removed at the factory. The fine powder generated here is treated as a by-product and discarded, and its effective use is desired. The fine powder of volcanic glass in the present invention may be this by-product.

  When blending ordinary Portland cement and magnesium hydroxide into fine crushed stone powder, adding water and kneading, molding and curing to solidify the fine crushed stone powder, the mass ratio of ordinary Portland cement and magnesium hydroxide is 1.0: About solidification technology of crushed stone fine powder characterized by adjusting within the range of 1.0 to 1.0: 0.5, the amount of ordinary Portland cement is more than 5% by mass based on the total mass of raw material components It is 30 mass% or less, Preferably it adjusts within the range of 5-10 mass%.

  Magnesium hydroxide has the effect of lowering the pH without causing a decrease in strength of the solidified body even if the blending amount of ordinary Portland cement is small. When the blending amount is less than 5% by mass, the mechanical strength of the obtained solidified product is not sufficient. On the other hand, if it exceeds 30% by mass, the pH of the solidified body becomes 12 or more, the alkalinity becomes strong, and there are many restrictions in use.

  The blending amount shown in the present invention 5 and the present invention 10-13, in which glass fine powder, particularly waste glass fine powder is blended with the crushed fine powder, is the same as the blended amount of the crushed fine powder in solidifying the crushed fine powder by firing. The blending amount of the waste glass fine powder is adjusted within the range of 20 to 90% by mass based on the total mass within the range of 10 to 80% by mass based on the total mass, and the firing temperature is adjusted within the range of 800 to 1000 ° C. Preferably, the amount of fine crushed stone powder is within the range of 10 to 50% by mass based on the total mass, and the amount of waste glass fine powder is within the range of 50 to 90% by mass based on the total mass. It is preferable to adjust the firing temperature within a range of 850 to 950 ° C.

  When the blending amount of the fine crushed stone powder is 90% by mass or more, the mechanical strength of the obtained solidified product is not sufficient. Further, when the firing temperature is 800 ° C. or lower, the mechanical strength of the obtained solidified product is not sufficient. Further, fusion occurs when the firing temperature is 1000 ° C. or higher.

  In order to facilitate molding, it is preferable to mold by adding an appropriate amount of bentonite and water. The addition of bentonite has the effect of improving the handling of the solidified body as a granulated product and preventing it from collapsing when the solidified body is held. The amount of water added at this time is 5 to 30% by mass, preferably 10 to 25% by mass, based on the raw material mixture. When this mass is less than 5 mass%, mixing becomes difficult and it is difficult to obtain a homogeneous molded product. Moreover, when it exceeds 30 mass%, drying requires a long time and manufacturing efficiency falls.

  In extrusion molding, a wet method, for example, a method of adding 15 to 30% by mass of water to the total amount of the mixture is used. In the pressure molding, a semi-dry method, for example, a method of adding water up to 15% by mass, particularly 5 to 10% by mass of water, or a dry method is used. The molded product is dried if necessary, heated, and fired at a temperature in the range of 800 to 1000 ° C, preferably 850 to 950 ° C. The temperature increase may be performed at about 5 to 20 ° C./min.

  In order to obtain a lightweight solidified body, it can be obtained by blending organic powders such as finely ground bamboo powder, sawdust, rice husk powder and the like into the blended crushed stone powder and waste glass fine powder, and then firing.

  According to the method of the present invention, when ordinary Portland cement is used as a solidifying agent, by adding magnesium hydroxide or volcanic glass fine powder, a solidified powder of fine crushed stone powder having a low pH and a strength similar to that of a solid substance can be obtained. A solidified body can be obtained. Moreover, when waste glass fine powder is mix | blended with crushed stone fine powder and it bakes and solidifies crushed stone fine powder after that, organic powders, such as bamboo pulverized fine powder, sawdust, rice husk powder, are mix | blended. Furthermore, by blending bentonite, it is possible to obtain a light solidified body or a solidified body having the same strength as crushed stone.

  In this case, firing can be performed at a temperature lower than the normal sintering temperature, and cost reduction can be achieved in combination with effective utilization of unused resources and waste and environmental conservation. In addition, since this solidified body can appropriately change physical properties such as high strength and high water absorption by changing raw materials and production conditions, for example, high strength materials are used as aggregates similar to crushed stones, and in particular. Lightweight and high water absorption products can be used for various purposes such as water purification materials, sewage purification materials, mixed materials for greening buildings, and planting materials.

This embodiment will be described in place of the examples.
<Example>
EXAMPLES Next, although an Example demonstrates this invention further in detail, this invention is not limited at all by these Examples. In addition, the ratio of the compounding component in each Example is represented by the mass%.

<Example 1>
90 g of crushed stone fine powder of 1.2 mm or less from A quarry, 5 g of ordinary Portland cement and 5 g of magnesium hydroxide were mixed with a kneader until uniform, and then 12 g of water was added and kneaded. The obtained kneaded material was molded into a columnar shape with a pressure of 10 MPa. The obtained molded body was cured at 80 ° C. for half a day and then at 80 ° C. for 1 day under water. The physical properties of the solidified product thus obtained were a compressive strength of 20.6 MPa, a water absorption of 10.5% by weight, a specific gravity of 2.41, and a pH of 10.9. In addition, specific gravity was represented by the specific gravity of the solidified body of a water absorption state, and pH was represented by the pH of the water after immersing the fragment | piece after an intensity | strength measurement in distilled water 10 times the weight for one day.

<Examples 2 to 8>
Each solidified body was obtained in the same manner as in Example 1 except that the raw materials having the composition and mixing ratio shown in Table 1 were used. Table 2 shows the physical properties of each solidified product.
<Comparative example>
Only ordinary Portland cement was used. A solidified body was obtained in the same manner as in Example 1 except that the raw materials having the composition and mixing ratio shown in Table 1 were used. Table 2 shows the physical properties of the solidified body.

表１中の各符号は次のとおりである。
ＡＰ：Ａ砕石場の１．２ｍｍ以下の砕石微粉末
ＢＰ：Ｂ砕石場の１．２ｍｍ以下の砕石微粉末
ＰＳ：普通ポルトランドセメント
ＨＭ：水酸化マグネシウム
ＶＧ：火山ガラス微粉末

Each code | symbol in Table 1 is as follows.
AP: A crushed stone fine powder of 1.2 mm or less of A crushed yard BP: A crushed stone fine powder of 1.2 mm or less of B crushed stone PS: Ordinary Portland cement HM: Magnesium hydroxide VG: Fine powder of volcanic glass

以上の結果から、少ないセメント量であっても、強度値を確保でき、ｐＨ値を低く抑えられることを確認した。

From the above results, it was confirmed that the strength value could be secured and the pH value could be kept low even with a small amount of cement.

<Example 9>
Fill a heat-resistant container with a mixture of 20 g of crushed stone fine powder of 1.2 mm or less and 80 g of waste glass fine powder in a kneader until uniform, and raise the temperature to 900 ° C. at a rate of 10 ° C./min. And kept at that temperature for 30 minutes and then cooled. As a result, a melt-foamed solidified body was obtained. A block sample was cut out from the obtained solidified product, and the bulk density calculated from its weight and volume was 0.731 g / cm ³ . The obtained solidified body was crushed to 13.2 mm or less and sieved with 9.50, 4.75, 2.36 mm sieves. Table 3 shows the density of each particle size category. The density was measured with a gas displacement density measuring device (penta-pycnometer, manufactured by Quantachrome). The same applies to the following embodiments.

以上の結果から、水持ちがよく、且つ水はけのよい固化体ができたことを確認した。

From the above results, it was confirmed that a solidified body having good water retention and good drainage was obtained.

<Example 10>
A mixture obtained by mixing 20 g of crushed stone fine powder of 1.2 mm or less from A crushed stone, 80 g of waste glass fine powder, and 2.5 g of bamboo crushed powder until uniform with a kneader was filled in a heat-resistant container, and the temperature rising rate was 10 ° C / The temperature was raised to 900 ° C. in minutes, held at that temperature for 30 minutes, and then cooled. As a result, a melt-foamed solidified body was obtained. A block sample was cut out from the obtained solidified product, and the bulk density calculated from its weight and volume was 0.631 g / cm ³ . The obtained solidified body was crushed to 13.2 mm or less and sieved with 9.50, 4.75, 2.36 mm sieves. Table 4 shows the density of each particle size category.

<Examples 11 to 22>
After mixing 15 to 90 g of crushed stone fine powder of 1.2 mm or less of A quarry, 5 to 90 g of waste glass fine powder and 5 g of bentonite until uniform, average while adding water with a bread granulator A granular molded body having a particle diameter of 10 mm was prepared. Molded bodies were prepared for 12 examples as shown in Table 5. After drying, it was fired using a rotating tubular furnace (made of stainless steel having an inner diameter of 42 mm and a length of 800 mm).

  It took about 20 minutes from the introduction of the furnace to the discharge, the rotation speed was 3.01 rpm, the inclination angle was 3 ° 20 ′, the maximum temperature in the furnace was 880 to 890 ° C., and the position was almost in the center of the furnace. The water absorption, crushing strength, and density of the obtained solidified product are shown in FIG. The density was measured with a helium gas replacement density meter. The crushing strength was determined by pressing spherical particles from above and below, and dividing the weight at the time of fracture by the projected sectional area of the sphere. In addition, although the compressive strength of the crushed stone raw rock is 75-100 MPa, the crushing strength is 15-22 MPa. It was confirmed that the density increased as the proportion of fine crushed stone powder increased.

表５中の符号は次のとおりである。
ＡＰ：Ａ砕石場の１．２ｍｍ以下の砕石微粉末

The symbols in Table 5 are as follows.
AP: A crushed stone fine powder of 1.2 mm or less in A quarry

<Examples 23 to 27>
After mixing 15 g of crushed stone powder of 1.2 mm or less, A waste glass fine powder of 80 g, bentonite of 5 g and bamboo crushed powder of 2.5 g in a kneader until uniform, add water with a bread granulator. A granular molded body having an average particle diameter of 10 mm was prepared. Molded bodies were prepared for five examples as shown in Table 6. After drying, it was fired using the rotary tubular furnace. The water absorption, crushing strength, and density of the obtained solidified product are shown in FIG. In this example, it was confirmed that the addition of bamboo powder can be made lower in density than the case where bamboo powder is not added.

表６中の符号は次のとおりである。
ＡＰ：Ａ砕石場の１．２ｍｍ以下の砕石微粉末
密度の比較例として、ガラス微粉末にＳｉＣを添加して焼成・発泡させた泡ガラス（商品名：軽量土木材料「スーパーソル」）の気泡の大きさの異なる３種類の試料について、前述の密度測定器で密度を測定した。その結果を表７に示した。

The symbols in Table 6 are as follows.
AP: A crushed stone powder of 1.2 mm or less at A quarry. As a comparative example of density, bubbles in bubble glass (trade name: lightweight civil engineering material “Supersol”) obtained by adding SiC to glass fine powder and firing and foaming. The density of three types of samples having different sizes was measured with the above-described density measuring device. The results are shown in Table 7.

  The bulk density is slightly smaller than the density. A small difference indicates that most of the contained bubbles are closed cells. The results are all 1 or less. In particular, since it has poor water retention and closed pores when used for planting, it has a structure in which microorganisms and the like are difficult to settle, and is not suitable for water purification. On the other hand, in the case of the present Example, the density was 1 or more in any case, and it was confirmed that it could be used as a material with good water retention.

FIG. 1 is a data diagram showing the water absorption rate, crushing strength, and density of solidified bodies in Examples 11 to 22. FIG. 2 is a data diagram showing the water absorption rate, crushing strength, and density of the solidified bodies in Examples 23 to 27.

Claims (13)

  Add a mixture of ordinary Portland cement and magnesium hydroxide adjusted to a mass ratio of 1.0: 1.0 to 1.0: 0.5, and add water. Solidified crushed stone powder that has been kneaded, molded, cured and solidified.   Add a mixture of ordinary Portland cement and volcanic glass fine powder adjusted to a mass ratio within the range of 1.0: 1.0 to 1.0: 0.5, and add water. Kneaded, molded, cured and solidified crushed stone fine powder. In the solidified body of fine crushed stone powder according to claim 1 and 2,
The said mixture is adjusted in the range of 5-30 mass% with respect to the total mass of the said mix | blended mixture, The solidified body of the crushed stone fine powder characterized by the above-mentioned. In the solidified body of fine crushed stone powder according to claim 2,
A solidified powder of fine crushed stone powder, wherein the glass fine powder has a particle size of 45 μm or less. In the mixture of crushed stone fine powder and waste glass fine powder,
The amount of the fine crushed stone powder is adjusted within the range of 10 to 80% by mass of the mixture, the amount of the fine glass powder is adjusted within the range of 20 to 90% by mass of the mixture, and the mixture is mixed. A solidified product of fine crushed stone powder that has been molded and fired and solidified within a temperature range of 800 to 1000 ° C.   A mixture of ordinary Portland cement and magnesium hydroxide, each having a mass ratio adjusted within the range of 1.0: 1.0 to 1.0: 0.5, was added to the fine crushed stone powder, and this mixture was blended. A method for solidifying fine crushed stone powder, characterized in that water is added and kneaded, the kneaded mixture is molded, and the molded mixture is cured and solidified.   A mixture of ordinary Portland cement and volcanic glass fine powder adjusted to a mass ratio within the range of 1.0: 1.0 to 1.0: 0.5, respectively, is added to the crushed stone fine powder to form a blend. A method for solidifying fine crushed stone powder, characterized in that water is added to a product and kneaded, the kneaded compound is molded, and the molded compound is cured and solidified. In the solidification method of the crushed stone fine powder of Claim 6 and 7,
The said mixture is what was adjusted in the range of 5-30 mass% with respect to the total mass of the said mix | blended mixture, The solidification method of the fine crushed stone powder characterized by the above-mentioned. In the solidification method of the crushed stone fine powder of Claim 7,
The volcanic glass fine powder has a particle size of 45 μm or less. In the mixture of crushed stone fine powder and waste glass fine powder,
The amount of the fine crushed stone powder is adjusted within the range of 10 to 80% by mass of the mixture, the amount of the fine glass powder is adjusted within the range of 20 to 90% by mass of the mixture, and the mixture is mixed. A method for solidifying fine crushed stone powder, characterized by molding and solidifying the molded mixture by firing within a temperature range of 800 to 1000 ° C. In the solidification method of the crushed stone fine powder of Claim 10,
One or more organic powders selected from bamboo pulverized fine powder, sawdust, and rice husk powder are added to the mixture within a range of 2 to 5% by mass, and the mixture is solidified. In the solidification method of the crushed stone fine powder of Claim 10,
Bentonite is added to the mixture to form a blend, water is added to the blend and kneaded, the blended blend is molded, the molded blend is dried, and the dried blend is fired. And solidifying the crushed stone fine powder. In the solidification method of the crushed stone fine powder of Claim 12,
One or more organic powders selected from bamboo pulverized fine powder, sawdust, and rice husk powder are added to the blend within a range of 2 to 5% by mass and solidified as a blend.

Images