JPH0723240B2 - Utilization method of fine powder generated in crushed sand manufacturing process - Google Patents
Utilization method of fine powder generated in crushed sand manufacturing processInfo
- Publication number
- JPH0723240B2 JPH0723240B2 JP63289385A JP28938588A JPH0723240B2 JP H0723240 B2 JPH0723240 B2 JP H0723240B2 JP 63289385 A JP63289385 A JP 63289385A JP 28938588 A JP28938588 A JP 28938588A JP H0723240 B2 JPH0723240 B2 JP H0723240B2
- Authority
- JP
- Japan
- Prior art keywords
- crushed sand
- fine powder
- manufacturing process
- powder generated
- crushed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000004576 sand Substances 0.000 title claims description 29
- 238000000034 method Methods 0.000 title claims description 23
- 239000000843 powder Substances 0.000 title claims description 22
- 238000004519 manufacturing process Methods 0.000 title claims description 12
- 239000004568 cement Substances 0.000 claims description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- 238000000465 moulding Methods 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 2
- 239000004575 stone Substances 0.000 claims description 2
- 230000001172 regenerating effect Effects 0.000 claims 1
- 230000005484 gravity Effects 0.000 description 12
- 238000010521 absorption reaction Methods 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 7
- 238000003825 pressing Methods 0.000 description 5
- 239000000203 mixture Substances 0.000 description 4
- 230000000704 physical effect Effects 0.000 description 3
- 238000011282 treatment Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000010437 gem Substances 0.000 description 1
- 229910001751 gemstone Inorganic materials 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/02—Agglomerated materials, e.g. artificial aggregates
- C04B18/021—Agglomerated materials, e.g. artificial aggregates agglomerated by a mineral binder, e.g. cement
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Civil Engineering (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
- Press-Shaping Or Shaping Using Conveyers (AREA)
Description
【発明の詳細な説明】 ［発明の目的］ （産業上の利用分野） 本発明は砕砂製造過程にて発生する微粉末の利用方法に
関する。DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a method of using fine powder generated in a crushed sand manufacturing process.
（従来の技術） 一般に砕砂は第４図に示されるように原石を破砕し、所
定の粒度に分級して製品としている。JIS A5004（コン
クリート用砕砂）では、0.15mmのふるいを通るものの百
分率を15〜２％と規定しており、規定から外れる微粉部
分は砕砂より分離回収し廃棄処分している。(Prior Art) In general, crushed sand is obtained by crushing rough stones as shown in FIG. JIS A5004 (crushed sand for concrete) stipulates that the percentage of those that pass through a 0.15 mm sieve is 15 to 2%, and the fine powder portion that does not meet the regulations is separated from crushed sand and discarded.
（発明が解決しようとする課題） 砕砂製造工場で発生する微粉末は、砕砂生産量１万ｔに
つき1500〜2500tであり、利用価値がないため、埋め立
て廃棄処分している。しかし、発生量が膨大であるた
め、埋め立て地確保が困難になってきている。(Problems to be Solved by the Invention) The amount of fine powder generated in a crushed sand manufacturing plant is 1500 to 2500 tons per 10,000 tons of crushed sand, and since it has no utility value, it is disposed of in landfill. However, it is becoming difficult to secure landfill because the amount of generation is huge.
本発明は上記事情に鑑みてなされたものであり、砕砂製
造過程にて発生する有効処理の可能な微粉末の利用方法
を提供することを目的としている。The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a method of using fine powder that can be effectively treated in the crushed sand manufacturing process.
［発明の構成］ （課題を解決するための手段） 上記目的を達成するため、本発明では砕砂の製造工程に
て発生した微粉末に対して水分を調整し、適当量のセメ
ントを添加して均一に混練した後、加圧成型して密実な
硬化体とし、これを適度に破砕して細骨材とすることに
より、通常の工程で製造される砕砂内へ混入できるよう
構成したものである。[Structure of the Invention] (Means for Solving the Problems) In order to achieve the above object, in the present invention, the water content is adjusted to the fine powder generated in the crushed sand manufacturing process, and an appropriate amount of cement is added. After kneading uniformly, pressure molding is performed to make a solid hardened body, which is appropriately crushed to form fine aggregate, which can be mixed into the crushed sand produced in the usual process. is there.
（作用） したがって、砕砂製造過程にて発生した微粉末のほとん
どすべては再生細骨材として同一製品である砕砂へ還元
でき、資源の有効利用ができるばかりか、微粉末の廃棄
問題が解決できる。(Operation) Therefore, almost all of the fine powder generated in the crushed sand manufacturing process can be reduced to crushed sand which is the same product as recycled fine aggregate, so that resources can be effectively used and the problem of discarding fine powder can be solved.
（実施例） 以下図面を参照して実施例を説明する。(Examples) Examples will be described below with reference to the drawings.
第１図は本発明による砕砂製造過程にて発生する微粉末
（含水率18％）の利用方法を説明するための一実施例の
工程図である。FIG. 1 is a process chart of an embodiment for explaining a method of using fine powder (water content 18%) generated in the crushed sand manufacturing process according to the present invention.
第１図において、処理６が新たに追加された工程であ
り、この工程にて再生細骨材をつくって、製品として回
収するものである。In FIG. 1, treatment 6 is a newly added step, in which recycled fine aggregate is produced and recovered as a product.
以下に処理６の内容を説明する。先ず、処理61はセメン
ト添加混合工程であり、ここでは微粉末（含水率約18
％）に10〜30％のセメントを添加して、均一に混合す
る。加圧成型工程62では前記混合物に対して300kgf/cm2
にて加圧成型し、密実とする。養生工程63では気中にて
養生し、この処理を経てセメントの水和反応により硬化
体となったものを、破砕工程64にて適度に破砕して再生
細骨材をつくり、これを製品へ添加する。The contents of the process 6 will be described below. First, process 61 is a cement addition and mixing process, in which fine powder (water content of about 18
%) With 10-30% cement and mix evenly. In the pressure molding step 62, 300 kgf / cm 2 is applied to the mixture.
It is pressure-molded and made solid. In the curing step 63, it is cured in the air, and after this treatment, it becomes a hardened body due to the hydration reaction of cement, and it is appropriately crushed in the crushing step 64 to make recycled fine aggregate, and this is made into a product. Added.
以上の一連の処理により微粉末を再生細骨材として再生
した。なお、製品砕砂への添加割合は砕砂に対し20％ま
でが良いことがわかった。The fine powder was regenerated as a regenerated fine aggregate by the above series of treatments. It was found that the addition ratio to the crushed sand of the product should be up to 20% of the crushed sand.
また、破砕前の硬化体を種々の用途にそのまま利用でき
ることは自明のことである。It is also obvious that the cured product before crushing can be used as it is for various purposes.
以下に再生細骨材についての物性評価についての試験結
果を示す。The test results for evaluation of the physical properties of recycled fine aggregate are shown below.
（１）セメント添加量について ここで再生細骨材について、セメント添加量を5,10,15,
20,30％と変化させて試料をつくり、これとセメント添
加量２％の比較例について、圧縮強度と比重とについて
比較し、第１表に示す。なお、圧縮強度は加圧成型硬化
体を示したものである。(1) Amount of cement added Here, for recycled fine aggregate, the amount of cement added was 5, 10, 15,
A sample was prepared by changing it to 20, 30%, and the compression strength and the specific gravity of this and a comparative example in which the amount of cement added was 2% were compared, and the results are shown in Table 1. The compressive strength refers to a pressure-molded cured product.
第１表の結果を示したものが第２図である。 FIG. 2 shows the results of Table 1.
試料No.1からNo.5の圧縮強度は、いずれも100kgf/cm2以
上が確保されているが、比較例では微粉末粒子を強固に
結合させるセメントの結合力が量的に不足しており、非
常に弱い強度となっている。これは加圧成型硬化体を破
砕し、再生細骨材として利用する場合に、強度不足を生
じさせる原因となる。The compressive strengths of Samples No. 1 to No. 5 are all secured at 100 kgf / cm 2 or more, but in the comparative example, the bonding force of the cement that firmly bonds the fine powder particles is insufficient in quantity. , Very weak strength. This causes a lack of strength when the pressure-molded cured product is crushed and used as a recycled fine aggregate.
再生細骨材の比重は圧縮強度に関係しており、セメント
添加量が多いと比重が大きくなる。試料に対しての比較
例の比重はかなり小さい。これは、セメントが適当量以
上添加されると微粉末の含有水と反応してなるセメント
水和物が緻密に内部を充填し、強度と比重を高めること
によると考えられる。上記実験の結果から、セメントの
添加量は５％以上が必要であり、物性と経済性を考慮す
ると10〜20％が好ましい。The specific gravity of recycled fine aggregate is related to the compressive strength, and the greater the amount of cement added, the greater the specific gravity. The specific gravity of the comparative example with respect to the sample is quite small. It is considered that this is because the cement hydrate, which reacts with the water contained in the fine powder when the cement is added in an appropriate amount or more, densely fills the inside and increases the strength and the specific gravity. From the results of the above experiment, it is necessary to add 5% or more of cement, and 10 to 20% is preferable in consideration of physical properties and economical efficiency.
（２）加圧力について 微粉末（含水率18％）にセメントを外割で15％添加混合
し、加圧成型する際の圧力を100,300,500,1,000kgf/cm2
とした各試料と、加圧力を50kgf/cm2とした比較例とを
用いて、再生細骨材の比重及び吸水率を求めたものの一
覧を第２表に示す。(2) Pressing force 15% cement is added to the fine powder (water content 18%) by external ratio, and the pressure is 100,300,500,1,000kgf / cm 2 when pressure molding.
Table 2 shows a list of the specific gravity and the water absorption of the regenerated fine aggregate obtained by using each of the samples and the comparative example in which the pressing force was 50 kgf / cm 2 .
第２表を図示したものが第３図である。 FIG. 3 shows the second table.
試料No.1からNo.4においては比重が2.1以上と大きく、
吸水率も10％以下と好ましい値を示す。これに対して比
較例では加圧力が50kgf/cm2と小さく、密実性に欠け、
したがって空隙が多く、吸水率も19％と非常に大きく、
再生細骨材としての特性に劣る。Sample No. 1 to No. 4 have a large specific gravity of 2.1 or more,
The water absorption rate is 10% or less, which is a preferable value. On the other hand, in the comparative example, the pressing force is as small as 50 kgf / cm 2 , lacking solidity,
Therefore, there are many voids and the water absorption rate is very large at 19%,
Inferior in properties as recycled fine aggregate.
上記試料の場合、最大加圧力は1,000kgf/cm2までである
が、加圧力は再生細骨材としての品質面からは高い程よ
い。実用的には100kgf/cm2以上が必要である。In the case of the above sample, the maximum pressing force is up to 1,000 kgf / cm 2 , but the higher the pressing force, the better in terms of quality as recycled fine aggregate. Practically, 100 kgf / cm 2 or more is required.
（３）比重、吸水率、ふるい通過量について 微粉末（含水率18％）にセメントを外割で15％添加混合
し、300kgf/cm2で加圧成型し、７日間気中養生した硬化
体を破砕して再生細骨材をつくった。これを通常の方法
で製造した砕砂に混ぜて細骨材として利用するに際し、
再生細骨材の添加混合率を5,10,20％とした試料例と、3
0％とした比較例を第３表に示す。(3) Specific gravity, water absorption rate, and sieve passage amount 15% cement was added to fine powder (water content 18%) by external ratio, and the mixture was pressure molded at 300 kgf / cm 2 and cured in air for 7 days. Was crushed to make recycled fine aggregate. When using this as fine aggregate by mixing it with crushed sand produced by the usual method,
Samples with recycled fine aggregates mixed at 5, 10 and 20%
Table 3 shows a comparative example with 0%.
試料No.1〜No.3はいずれも比重、吸水率、ふるい分け試
験においてJIS（コンクリート用砕砂）基準範囲内にあ
る。Samples No.1 to No.3 are all within the JIS (crushed sand for concrete) standard range in specific gravity, water absorption and sieving test.
これに対し、比較例は比重及び吸水率がJIS規格からは
ずれる。なお、参考例は通常の方法で製造された砕砂に
ついての物性値を表示したものである。On the other hand, in the comparative example, the specific gravity and water absorption deviate from the JIS standard. In addition, the reference example displays the physical property value about the crushed sand manufactured by the normal method.
（４）コンクリートの圧縮強度について 砕砂に対する再生細骨材の各種混合割合時のコンクリー
ト圧縮強度について、第４表に示す。 (4) Compressive strength of concrete Table 4 shows the compressive strength of concrete at various mixing ratios of recycled fine aggregate to crushed sand.
各、再生細骨材を用いたコンクリートでは、初期（３
日,7日）及び長期（28日）材令とも、通常の方法で製造
された砕砂と同等あるいはそれ以上の圧縮強度を示して
おり、再生細骨材としての利用上、問題のないことがわ
かる。 For each concrete using recycled fine aggregate, the initial (3
(7 days, 7 days) and long-term (28 days) age show compressive strength equal to or higher than that of crushed sand produced by normal method, and there is no problem in using as recycled fine aggregate. Recognize.
しかし、再生細骨材を前記砕砂に対し30％混合して使用
する場合には、圧縮強度が砕砂単味使用のコンクリート
に比べて低くなるという問題を生ずる。However, when the recycled fine aggregate is used in a mixture of 30% with the crushed sand, there arises a problem that the compressive strength is lower than that of concrete using the crushed sand alone.
［発明の効果］ 以上説明したように、本発明によれば、砕砂製造過程に
おいて発生する微粉末を細骨材化し、製品に戻すように
したので、微粉末の廃棄問題が解決できるばかりか、資
源の節約も併せて可能となる。[Effects of the Invention] As described above, according to the present invention, since fine powder generated in the crushed sand manufacturing process is made into fine aggregate and returned to the product, not only the problem of discarding fine powder can be solved, Resource savings will also be possible.
第１図は本発明による砕砂製造過程にて発生する微粉末
の利用方法を説明する工程図、第２図はセメント添加量
と再生細骨材の比重及び圧縮強度との関係図、第３図は
加圧力と再生細骨材の比重及び吸水率との関係図、第４
図は砕砂製造についての従来方法を示す図である。 １……原石、２……破砕工程 ３……分級工程、４……製品 ５……微粉末 61……セメント添加混合工程 62……加圧成型工程、63……養生工程 64……破砕工程FIG. 1 is a process diagram explaining a method of using fine powder generated in the crushed sand manufacturing process according to the present invention, FIG. 2 is a relational diagram between the amount of cement added and the specific gravity and compressive strength of recycled fine aggregate, and FIG. Is the relationship between the pressure and the specific gravity and water absorption of recycled fine aggregate,
The figure shows a conventional method for producing crushed sand. 1 …… Gemstone 2 …… Crushing process 3 …… Classification process 4 …… Product 5 …… Fine powder 61 …… Cement addition mixing process 62 …… Pressure molding process 63 …… Curing process 64 …… Crushing process
Claims (2)
造方法において、破砕過程で発生した微粉末の水分を調
整した後、５％以上のセメントを添加混合し、100kgf/c
m2以上の加圧成型により密実に硬化させて再生細骨材と
することを特徴とする砕砂製造過程にて発生する微粉末
の利用方法。1. A method for producing crushed sand in which a rough stone is crushed to a predetermined particle size, after adjusting the water content of fine powder generated in the crushing process, 5% or more of cement is added and mixed to obtain 100 kgf / c.
A method for utilizing fine powder generated in a crushed sand manufacturing process, which comprises regenerating fine aggregate by densely hardening it by press molding of m 2 or more.
合で混入して製品とすることを特徴とする請求項１項記
載の砕砂製造過程にて発生する微粉末の利用方法。2. The method of using fine powder generated in the crushed sand manufacturing process according to claim 1, wherein the recycled fine aggregate is mixed into crushed sand in a ratio of 20% at maximum. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63289385A JPH0723240B2 (en) | 1988-11-16 | 1988-11-16 | Utilization method of fine powder generated in crushed sand manufacturing process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63289385A JPH0723240B2 (en) | 1988-11-16 | 1988-11-16 | Utilization method of fine powder generated in crushed sand manufacturing process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02137750A JPH02137750A (en) | 1990-05-28 |
| JPH0723240B2 true JPH0723240B2 (en) | 1995-03-15 |
Family
ID=17742535
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63289385A Expired - Fee Related JPH0723240B2 (en) | 1988-11-16 | 1988-11-16 | Utilization method of fine powder generated in crushed sand manufacturing process |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0723240B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3448321B2 (en) * | 1993-09-01 | 2003-09-22 | 実 深谷 | Construction waste mud treatment method |
| KR100451053B1 (en) * | 2002-02-18 | 2004-10-02 | 황익현 | Paving method using stone powder for water permeable cement concrete road |
| JP5082651B2 (en) * | 2007-07-26 | 2012-11-28 | 東京電力株式会社 | Surface treatment method for recycled fine aggregate |
| JP4538575B2 (en) * | 2009-02-03 | 2010-09-08 | 独立行政法人国立高等専門学校機構 | Artificial stone by mixing rock sludge and waste molten slag |
| CN113402189B (en) * | 2021-07-21 | 2022-08-05 | 深圳市鲲鹏环保科技有限公司 | Machine-made sand and stone secondary crushing and secondary screening production process |
-
1988
- 1988-11-16 JP JP63289385A patent/JPH0723240B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02137750A (en) | 1990-05-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |