JP2003176162A - Concrete-not-hardened sludge granular material and production method therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To utilize a concrete-not-hardened sludge granular material as a substitution of the total amount of a filler in concrete by increasing its strength. <P>SOLUTION: The concrete-not-hardened sludge granular material has a double structure where a covering layer consisting of inorganic powder is present on the surface of a nucleus formed by a mixture consisting of a dewatered cake of concrete-not-hardened sludge and a solidifying material. By blending the solidifying material into the nucleus, its strength increases. The granular material is produced by mixing a mixture consisting of a dewatered cake of the ready-mixed concrete sludge and a solidifying material in a mixer to form into paste, thereafter the mixture is poured into the mixer within 10 sec to make the same into the granular one, and the granular material is cured. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a green compact sludge granule and a method for producing the same, and more particularly, to a green conus sludge granule that can be used as an aggregate for concrete and a method for producing the same.

[0002]

2. Description of the Related Art In a factory that uses cement, such as a factory for manufacturing ready-mixed concrete or a factory for secondary concrete products, washing wastewater containing ready-mixed concrete is generated by cleaning a concrete mixer, a mixer for ready-mixed concrete, or the like.
This washing wastewater uses the wastewater treatment facility in the factory to separate the aggregate, and the remaining suspended water is called sludge water.
Further, the sludge water is separated into supernatant water and dehydrated cake by dehydration treatment.

Here, although the separated aggregate and supernatant water are reused, most of the dehydrated cake is entrusted to an industrial waste disposal company and disposed of by a means such as landfill. There is.

However, it is expected that the processing of this dehydrated cake will become more and more difficult in the future due to environmental problems and securing of a disposal site, and in recent years, various studies have been made on its reuse.

Among them, Japanese Patent Laid-Open No. 6-256051 discloses that the dehydrated cake is granulated and reused for partial replacement of concrete aggregate. This is a raw structure sludge granule having a double structure in which a coating layer mainly composed of an inorganic powder solidifying material is present on the surface of the grain mainly composed of the raw dewatered sludge cake, and the water content was adjusted to 30 to 45%. In this method, a dehydrated cake of raw conus sludge and an inorganic powder solidifying material are agitated in an omni mixer while being granulated, and then cured.

However, the above-mentioned Japanese Patent Laid-Open No. 6-256
Although the technology described in 051 opened the way for reuse of raw conus sludge, the obtained raw conus sludge granules can be partially replaced (about 5% replacement) of concrete aggregate. However, there was a defect that the strength was insufficient to reuse the entire amount for replacement.

The present invention has been made in view of the problems of the above-mentioned conventional techniques, and its purpose is to be able to be used for replacing the total amount of coarse aggregate or fine aggregate for concrete. It is an object of the present invention to provide a raw conus sludge granular material having various strengths and a method for producing the same.

[0008]

The inventors of the present invention have conducted various studies to achieve the above-mentioned object, and as a result, mainly on the surface of the core formed by the mixture of the dehydrated cake of the raw conus sludge and the solidifying material, If a raw structure sludge granule having a double structure having a coating layer made of an inorganic powder is used, it can be used for replacing the total amount of aggregate for concrete. It was found that the mixture can be easily produced by making a mixture of a cake and a solidifying material into a paste in a mixer, and then introducing a mixture mainly of inorganic powder into the mixer in a short time of 10 seconds or less to granulate. Was completed.

[0009] That is, the present invention is characterized by being a double-structured granular material in which a coating layer mainly composed of an inorganic powder is present on the surface of a core formed mainly of a mixture of a dehydrated cake of raw conus sludge and a solidifying material. It is a raw conus sludge granular material (claim 1). Furthermore, the present invention provides the granular raw material according to claim 1, wherein the thickness of the coating layer mainly composed of the inorganic powder is 1% or more and less than 20% of the particle diameter. Claim 2). Furthermore, the present invention is the raw condensate granular material (claim 3), wherein the solidifying material is blast furnace slag powder in the granular material according to claim 1 or 2. Further, the present invention is the granular material according to any one of claims 1 to 3, characterized in that the ignition loss of the solid content of the raw con sludge is less than 15% by weight (claim 4). ). Furthermore, the present invention provides claims 1 to 4.
In any of the granules, the ratio of the core component formed mainly by the mixture of the dehydrated cake of green raw sludge and the solidifying material to the coating layer component mainly composed of inorganic powder is 100 parts by weight, The latter is less than 60 parts by weight, which is a raw conus sludge granule (claim 5). Further, the present invention relates to the granular material according to any one of claims 3 to 5, wherein the ratio of the dewatered cake of raw conus sludge to the blast furnace slag powder in the core mainly formed by the mixture of the dewatered cake of raw conus sludge and the solidifying material. Is 100 to 100 parts by weight of the former, and the latter is 35 to 100 parts by weight. Further, according to the present invention, first, a mixture mainly composed of a dehydrated cake of raw conus sludge and a solidifying material is kneaded in a mixer until it becomes a paste, and then a mixture mainly composed of inorganic powder is put into the mixer within 10 seconds. The method for producing a green conus sludge granule according to any one of claims 1 to 6, characterized in that the granules are granulated by curing and the granules are cured. Furthermore, the present invention provides claims 1 to 6.
In any one of the above, the granular substance is a raw conus sludge granular substance (claim 8), which is a granular substance used as an aggregate for concrete. Further, the present invention is the granular material according to any one of claims 1 to 6, wherein the granular material is a granular material used as a lightweight aggregate for concrete (claim 9). ). Furthermore, the present invention provides claim 7.
In the method for producing a green compact of the present invention, the granular material is a granular material used as an aggregate for concrete (claim 10). Furthermore, the present invention provides the method for producing fresh consludge granules according to claim 7, wherein the granules are granules used as lightweight aggregate for concrete (claim 11). is there.

In the present invention, the dewatered cake of raw conus sludge is not only a cake mainly composed of cement remaining after dehydration of sludge water by a dewatering machine, but also a natural sedimentation or continuous concentration device (thickener) for solid components in sludge water. , Those obtained by separating and concentrating with a sedimentation separation device such as a continuous clarification device (clarifier), those obtained by drying sludge water or dehydrated cake by nature or by heating, ventilation, etc.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in more detail below. The present invention mainly relates to the surface of the core formed by the mixture of the dehydrated cake of raw conus sludge and the solidifying material,
It is a raw conus sludge granule characterized in that it is a granule having a double structure in which a coating layer mainly composed of an inorganic powder is present. When the granules having a double structure are granulated by the inventors of the present application, the granule strength becomes higher when the solidification material is mixed into the inner core than when the solidification material is mixed into the outer coating layer. And found the present application. Although solidifying material may be used for the coating layer, if the core does not contain the solidifying material, the crushing strength of the granular material will be low even if the proportion of the solidifying material in the coating layer is increased, and it will be used to replace the total amount of aggregate for concrete. In order to do so, the strength becomes insufficient, which is not preferable. On the other hand, when the solidifying material is mixed in the core, the granular material strength increases with an increase in the mixing ratio, and a higher crushing strength can be obtained as compared with the case where the same amount of the solidifying material is mixed in the coating layer.

The smaller the ratio of the coating layer to the whole granules, the higher the strength of the granules. In particular, when the thickness of the coating layer is 20% or more of the particle size, the strength of the granular material is significantly reduced, which is not preferable. Further, the thickness of the coating layer also decreases as the amount of the coating layer component mainly composed of the inorganic powder is reduced, but if the amount of the inorganic powder is excessively reduced, the inorganic powder is mainly composed of the dehydrated cake of the raw conus sludge and the solidifying material. It is not preferable since it is kneaded into the mixture and the granulation becomes difficult. Therefore, it is difficult to produce particles in which the thickness of the coating layer is less than 1% of the particle size by this method.

As a solidifying material to be mixed in the core, it is preferable to use blast furnace slag powder as compared with cement, which is a general solidifying material, because the granular material strength is higher. Generally, it is said that the blast furnace slag powder alone does not provide sufficient strength because the alkali component is insufficient, but in the present invention, since the alkali component is supplied from the raw conus sludge contained in the core, it is used as a solidifying material. Is considered to have sufficient strength development even with blast furnace slag alone.

The larger the Blaine specific surface area of the inorganic powder, the smaller the amount of the inorganic powder added and the more the granulation becomes possible. When the Blaine specific surface area of the inorganic powder is 8000 cm ² / g or more,
This is preferable because the amount of inorganic powder added required for granulation is significantly reduced, the thickness of the coating layer can be reduced, and the strength of the granular material is increased. Further, since the amount of the inorganic powder added is reduced, it is possible to relatively increase the amount of the dehydrated cake of raw conus sludge used, and it is possible to further reduce the amount of the dehydrated cake treated as waste, which is preferable.

When the blast furnace slag powder is used as the solidifying material, it is preferable that the inorganic powder is a dry powder of green conus sludge because the strength of the granular material is further increased. The reason for this is considered to be that the alkaline component is also supplied to the blast furnace slag powder from the dry powder of raw conus sludge.

The higher the unconsumed portion of the cement in the raw consludge, the higher the granular strength. When the ignition loss of the solid raw sludge solid is used as an index for hydration of the cement, the loss of ignition of the solid content of less than 15% by weight significantly increases the strength of the granular material, which is preferable.
Specifically, it is conceivable to use fresh conslud within 24 hours after the production of fresh concrete, or to use fresh conslud in which hydration of the cement part is delayed by using a retarder.

When the proportion of the coating layer component is 60 parts by weight or more relative to 100 parts by weight of the core component, the thickness of the coating layer is 20.
%, It is difficult to set the content to less than%, and the strength of the granular material is significantly lowered, which is not preferable.

When blast-furnace slag powder is used as the solidifying material, the strength is lowered if the ratio of the dehydrated cake of raw conus sludge is too low or if the ratio of the blast-furnace slag powder is too low. If the content of the blast furnace slag powder is less than 35 parts by weight with respect to 100 parts by weight of the dehydrated cake, the amount of the solidifying material will be insufficient and the strength of the granular material will be reduced, which is not preferable. Also, the blast furnace slag powder is 10
Even if the amount exceeds 0 parts by weight, the strength is significantly reduced.
Not preferable. The reason why the strength decreases when the blast furnace slag powder exceeds 100 parts by weight with respect to 100 parts by weight of the dehydrated cake is that the ratio of the dehydrated cake is small and the amount of the alkaline component supplied from the dehydrated cake to the blast furnace slag powder is decreased. it is conceivable that. The range of 35 to 100 parts by weight of the blast furnace slag powder is most suitable for 100 parts by weight of the dehydrated cake because the strength of the granular material is high.

If the mixture mainly consisting of the dehydrated cake of green conus sludge and the solidifying material is not sufficiently made into a paste, the strength of the granular material is lowered, which is not preferable. To the mixture consisting of the dehydrated cake of raw conus sludge and the solidifying material, by adding the inorganic powder in a short time,
The mixture is used as a core, and an inorganic powder is attached to the outside of the mixture to granulate. The granular particles have the highest water content in the core, the water content decreases toward the outside, the surface is in a dry state, and the particles do not adhere to each other.
If the charging time of the inorganic powder exceeds 10 seconds, the inorganic powder is undesirably kneaded into the mixture mainly composed of the dehydrated cake of raw consulate and the solidifying material, which makes granulation difficult.

When blast furnace slag powder is used as the solidifying material, it is preferable to use the supernatant water of the raw conus sludge water as the curing water because the strength of the granular material is increased. It is considered that the reason for this is that the pH of the supernatant water is as high as about 12 and the alkaline component is supplied to the blast furnace slag powder from there.

When the above-mentioned granular material is used as an aggregate for concrete, it has a large number of fine irregularities on the surface as compared with a general aggregate, and it is preferable because it adheres well to cement paste.
Further, the absolute dry density of the granular material is 1.8 kg / L or less, JIS
A 5002 Structural lightweight concrete aggregates with absolute dry density specifications (light weight coarse aggregates less than 2.0kg / L, light fine aggregates less than 2.3kg / L) are satisfied. It can be used as a lightweight aggregate.

The mixer used for producing the above-mentioned granules is not particularly limited as long as it can paste the mixture of the dehydrated cake of raw conus sludge and the solidifying material and has a granulating function. is not. As the mixer, one type having both functions of pasting and granulation may be used, or two types of mixer for pasting and granulation may be used in combination.

[0023]

[Test Examples] The present invention will be described below with reference to test examples. 1. The dewatered cake of raw conslud used for the test is described. Raw concrete factory (Asano Concrete Co., Ltd.)
A raw dewatered cake of raw sludge generated at the seaside factory) was used. Dehydrated cake A: Dehydrated cake of raw consulate obtained by dehydration 8 hours after the generation of sludge water (solid content 40%, ignition loss 12% of solid content) Dehydrated cake B: Dehydrated 24 hours after generation of sludge water Dehydrated cake of raw con sludge obtained (solid content 40%,
Ignition loss of solid content 14%) Dehydrated cake C; Dehydrated cake of raw consulative obtained by dehydration 72 hours after generation of sludge water (solid content 40%,
Ignition loss of solid content 15%) Dewatered cake D; Dehydrated cake of raw consulage obtained by dehydration 168 hours after generation of sludge water (solid content 40
%, Loss on ignition of solid content 16%) Dehydrated cake E: Dehydrated cake of raw con sludge (solid content 40, obtained by adding a retarder 8 hours after the generation of sludge water and dehydrated 72 hours after the generation of sludge water). %, Loss on ignition of solid content 12%) In addition, solid content is 105 ° C
Was dried until a constant weight was obtained, the weight before and after the drying was measured, and the weight was determined by the following formula 1.

[Formula 1] The ignition loss of the solid content was determined by the JIS R 5202 Portland cement chemical analysis method using the sample dried at 105 ° C.

2. Other materials Materials other than the dehydrated cake of raw consludge are shown below. Cement: Taiheiyo Cement Co., Ltd. Ordinary Portland cement Blaine specific surface area 3600 cm ² / g Blast furnace slag; Daiichi Cement Co., Ltd. Blaine specific surface area 44
50 cm ² / g fly ash; Techno Resource Co., Ltd. Blaine specific surface area 5000 cm ² / g Filler A; Okutama Industry Co., Ltd. limestone powder Blaine specific surface area 3340 cm ² / g Filler B; Limestone powder Bran specific surface area of 8000 cm ² / g by classification Dry raw sludge dry powder; Dehydrated cake B of the raw con sludge was dried at 105 ° C. to a constant weight and crushed Brane specific surface area 9200 cm ² / g

3. Curing method The method for curing the above-mentioned granular material is shown below. Curing method A: Curing in tap water at 20 ℃ Curing method B: Curing in clear water of 20 ° C raw consludge water

The mixer is an H.H. manufactured by Taiheiyo Kiko Co., Ltd. Granulation was performed using an F (high function) mixer (capacity: 50 liters). Tables 1 and 2 show the composition and production conditions of the granular material.

[0027]

[Table 1]

[0028]

[Table 2]

The characteristics shown in 1) to 5) below were evaluated with respect to the above-mentioned granular material and granulated state. 1) Pasted state of a mixture composed mainly of dehydrated cake of raw consludge and a solidifying material; evaluated when touched with a finger, when there was a lump in the mixture that could be seen by touching with a finger, x: when no lump remained Was marked as ○. 2) Granulated state: evaluated visually, and when it becomes granular, ○,
The case where it did not become granular was marked with x. 3) Crush strength: 30 particles having a diameter of 10 to 15 mm after 28 days from the production were used, the crush strength of the particles was measured by a uniaxial compression tester, and the average value was displayed. The test method is JIS Z8841
The granule strength test method was used. 4) Thickness of the coating layer: Granule particles with a diameter of 10 to 15 mm are cut, the particle size and the thickness of the coating layer are measured using a caliper, and the particle size of the coating layer is occupied by the following formula 2. The percentage was calculated.

[Formula 2] 5) Absolute dry density of granules; diameter 5 to 2 after 28 days from production
Using 0 mm granule particles, the absolute dry density of the granules after 28 days was measured using JIS A 1110 coarse aggregate density and water absorption test method. The results are shown in Tables 3-4.

[0030]

[Table 3]

[0031]

[Table 4]

As is clear from Tables 3 and 4, when granulating a double-structured granule, the inner core portion is more than the case where the solidifying material is mixed in the outer coating layer (Comparative Examples 1 to 3). Mixing the solidifying material (Examples 1 to 3) resulted in higher crush strength of the granular material.

Even if the amount of the solidifying material mixed is the same, the thickness of the coating layer is 20% or more of the particle size (Example 4).
In comparison with the case where the thickness of the coating layer was less than 20% of the particle size (Example 2), the crushing strength decreased.

Even when the amount of the solidifying material mixed is the same, the case where the blast furnace slag powder is used as the solidifying material (Example 5) is more granular than the case where cement is used (Example 2). Higher crush strength.

The Blaine specific surface area of the inorganic powder is 80
When it is 00 cm ² / g or more (Example 7), 8000 cm ² / g
The amount of the inorganic powder required for granulation was smaller, the thickness of the coating layer was thinner, and the crush strength of the granules was higher than in the case of less than (Examples 5 to 6). When the Blaine specific surface area was less than 8000 cm ² / g, the inorganic powder was insufficient and the granulation could not be carried out in the same formulation as in Example 7 (Comparative Example 4).
~ 5).

Further, when blast furnace slag powder was used as the solidifying material and the inorganic powder was a dry powder of raw conus sludge (Example 8), when another inorganic powder was used even if the composition was the same (Example 7). ), The crushing strength of the granular material was higher than that of

When the ignition loss of the raw solid sludge solids is less than 15% by weight (Examples 8, 10, 13)
The crush strength of the particulate matter was higher than that in the case of 15% by weight or more (Examples 11 to 12).

Even if the amount of the solidifying agent is the same, if the ratio of the coating layer component is 60 parts by weight or more to 100 parts by weight of the core component (Example 4), it is less than 60 parts by weight. Compared with (Example 2), the crushing strength of the granular material was reduced.

When blast furnace slag powder is used as the solidifying material, the amount of blast furnace slag powder is less than 35 parts by weight based on 100 parts by weight of raw dewatered sludge cake (Example 1).
4, 15), or when the blast furnace slag powder exceeds 100 parts by weight (Example 18), the blast furnace slag powder is 35 to 35 parts by weight.
The crushing strength of the granular material was reduced as compared with the case of 100 parts by weight (Examples 8, 16, 17).

In addition, when the mixture mainly composed of the dehydrated cake of green conus sludge and the solidifying material was not sufficiently formed into a paste (Comparative Example 6), and formed into a paste (Example 8)
The crushing strength of the granules tended to be significantly lower than that of In addition, when a mixture mainly composed of inorganic powder is added to a mixture mainly composed of a dehydrated cake of green conus sludge and a solidifying material, the charging time of the inorganic powder is 1
When it exceeded 0 seconds, it was not granulated (Comparative Example 7).

Further, when blast furnace slag powder is used as the solidifying material, when it is aged in the clear water of raw consludge water (Examples 19 to 20), it is aged in tap water (Examples 8 to 9). The crushing strength of the granular material was higher than that of.

Next, the granular materials obtained in Examples 1 and 8 of the present invention were replaced with coarse aggregates or fine aggregates for concrete to produce concrete, and slump,
Each test of air content and compressive strength was performed. In addition, the particle size distribution was adjusted by sieving so that the particle size distribution of the raw conus sludge granules falls within the range of JIS A 5002 structural lightweight concrete aggregates specified as artificial lightweight aggregates.
Specifically, in the case of coarse aggregate replacement, it is 20 to 5 m of lightweight coarse aggregate.
Within the specified range of m, in the case of fine aggregate replacement, adjustment was made so as to match within the specified range of lightweight fine aggregate.

The concrete mix is shown in Table 5. Slump is 18 ± 2 cm, air volume is 4.5 ± 0.5% and W / C is 50%, 60%, 70% to change strength level.
3 levels. The amount of air was adjusted using an AE auxiliary agent (303, manufactured by NMB Co., Ltd.). In this experiment,
The test was performed for each of the case where the total amount of the coarse aggregate was replaced with the product of the present invention and the case where the total amount of the coarse aggregate and the fine aggregate were replaced.

Materials other than the green conus sludge granules are shown below. Cement; Taiheiyo Cement Co., Ltd. Ordinary Portland cement admixture; NMB Co., Ltd. AE water reducing agent No. 70 Coarse aggregate (for comparison); Mukuro crushed stone fine aggregate (for comparison); Ichihara Yamasand 50 % And Torigatayama crushed sand 5
0% mixed sand water; tap water

[0045]

[Table 5]

Using a pan-type forced kneading mixer (50 liters) as a mixer, the cement, the aggregate and the above granules were kneaded for 15 seconds, and then water was added and kneaded for 90 seconds to produce concrete. The curing method is 20 ° C.
Underwater curing (standard curing).

For the above concrete, the following 1) to
The characteristics shown in 3) were evaluated. 1) Slump: The test method was according to JIS A 1101 concrete slump test method. 2) Air content: The test method was performed according to the test method based on the pressure of the air content of JIS A 1128 fresh concrete. 3) Compressive strength test: The test method was performed according to the JIS A 1108 concrete compressive strength test method. The results are shown in Table 6.

[0048]

[Table 6]

Concretes using the green raw sludge granules according to the present invention (Examples 22 to 26) are concretes using commercially available lightweight aggregate mesalite (Comparative Examples 9 to 12).
Showed a higher compressive strength. Although the crushing strength of the granules of Example 1 was equivalent to that of mesalite, the compressive strength of the concrete was high. Therefore, it is considered that the granules of the present invention have good adhesion to the cement paste.

Further, the concrete (Examples 22 to 26) using the raw consulate granular material according to the present invention showed strength comparable to that of the concrete using commercially available crushed stone (Comparative Example 13). .

From the above test results, the raw conus sludge granules according to the present invention are
It was found that it is possible to replace the entire amount with lightweight coarse aggregate or lightweight fine aggregate.

[0052]

As described in detail above, since the raw conus sludge granules specified in the present invention have high crushing strength and good adhesiveness with cement paste, they are used for replacing the entire amount of concrete aggregate. This makes it possible to compensate for the shortage of aggregate resources, consume a large amount of raw contaminated sludge, and solve the problems of dump sites and environmental pollution.

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Takaki Maki             1-7 Kiyosumi, Koto-ku, Tokyo Asano             Concrete Co., Ltd. (72) Inventor Masanori Honma             1-7 Kiyosumi, Koto-ku, Tokyo Asano             Concrete Co., Ltd. (72) Inventor Tetsuro Seki             1-7 Kiyosumi, Koto-ku, Tokyo Asano             Concrete Co., Ltd. F-term (reference) 4D059 AA30 BD01 BD11 BE31 BG00                       BJ00 BK09 CC04 DA03 DA51                       DA64 DA66 DA67 DA70                 4G012 LA01 PA29 PA30 PC11 PE04

Claims (11)

[Claims] 1. A raw condensate having a double structure in which a coating layer mainly composed of an inorganic powder is present on the surface of a core formed mainly of a mixture of a dehydrated cake of raw condensate and a solidifying material. Sludge granules. 2. The granulated material according to claim 1, wherein the thickness of the coating layer mainly composed of inorganic powder is 1% or more and less than 20% of the particle diameter. 3. The granulated material according to claim 1 or 2, wherein the solidifying material is blast furnace slag powder. 4. The granular raw sludge according to any one of claims 1 to 3, wherein the ignition loss of the solid raw sludge is less than 15% by weight. 5. The granular material according to any one of claims 1 to 4, wherein a core component formed mainly by a mixture of the dehydrated cake of raw consulate and a solidifying material, and a coating layer component mainly composed of an inorganic powder. The ratio of the former 100 parts by weight to the latter 60 parts by weight is less than 60 parts by weight of the raw conus sludge granules. 6. The granular material according to any one of claims 3 to 5, wherein in the core formed mainly of the mixture of the dehydrated cake of raw conus sludge and the solidifying material, the ratio of the dehydrated cake of raw conus sludge to the blast furnace slag powder is , The former 100
The latter is 35 to 100 parts by weight with respect to parts by weight, and the raw conus sludge granules are characterized. 7. First, after kneading a mixture mainly composed of dehydrated cake of raw conus sludge and a solidifying material until it becomes a paste in the mixer, the mixture mainly composed of inorganic powder is put into the mixer within 10 seconds. 7. The method for producing green conus sludge granules according to any one of claims 1 to 6, which comprises granulating and curing the granules. 8. The raw conus sludge granular material according to any one of claims 1 to 6, wherein the granular material is a granular material used as an aggregate for concrete. 9. The raw conus sludge granular material according to any one of claims 1 to 6, wherein the granular material is a granular material used as a lightweight aggregate for concrete. 10. The method of producing a fresh conus sludge granular material according to claim 7, wherein the granular material is a granular material used as an aggregate for concrete. 11. The method of producing a fresh conus sludge granular material according to claim 7, wherein the granular material is a granular material used as a lightweight aggregate for concrete.