JPH04357149A - Method for recovering remnant material of lightweight cellular concrete - Google Patents
Method for recovering remnant material of lightweight cellular concreteInfo
- Publication number
- JPH04357149A JPH04357149A JP3131050A JP13105091A JPH04357149A JP H04357149 A JPH04357149 A JP H04357149A JP 3131050 A JP3131050 A JP 3131050A JP 13105091 A JP13105091 A JP 13105091A JP H04357149 A JPH04357149 A JP H04357149A
- Authority
- JP
- Japan
- Prior art keywords
- cellular concrete
- lightweight cellular
- alc
- raw material
- remnant materials
- 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.)
- Withdrawn
Links
- 239000011381 foam concrete Substances 0.000 title claims abstract description 15
- 238000000034 method Methods 0.000 title claims abstract description 12
- 239000000463 material Substances 0.000 title abstract description 11
- 239000002994 raw material Substances 0.000 claims abstract description 20
- 239000000843 powder Substances 0.000 claims abstract description 14
- 238000004519 manufacturing process Methods 0.000 claims abstract description 11
- 238000010298 pulverizing process Methods 0.000 claims description 4
- 239000004570 mortar (masonry) Substances 0.000 abstract description 5
- 239000002440 industrial waste Substances 0.000 abstract description 3
- 239000002245 particle Substances 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 18
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 16
- 239000000377 silicon dioxide Substances 0.000 description 7
- 238000005520 cutting process Methods 0.000 description 5
- 238000002156 mixing Methods 0.000 description 5
- 238000011084 recovery Methods 0.000 description 5
- 239000002002 slurry Substances 0.000 description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 239000004575 stone Substances 0.000 description 4
- 239000004568 cement Substances 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 2
- 235000011941 Tilia x europaea Nutrition 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000009837 dry grinding Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000004088 foaming agent Substances 0.000 description 2
- 239000004571 lime Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- MKTRXTLKNXLULX-UHFFFAOYSA-P pentacalcium;dioxido(oxo)silane;hydron;tetrahydrate Chemical compound [H+].[H+].O.O.O.O.[Ca+2].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O MKTRXTLKNXLULX-UHFFFAOYSA-P 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- 235000012255 calcium oxide Nutrition 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 238000001879 gelation Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000011268 mixed slurry Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000012056 semi-solid material Substances 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Processing Of Solid Wastes (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は、軽量気泡コンクリート
（以下、ＡＬＣと略記する。）の製造工場及び施工現場
に於いて多量に発生し産業廃棄物として処理されている
ＡＬＣパネルの端材をＡＬＣの製造用原料として有効に
回収し再利用を図ることに関するものである。[Industrial Application Field] The present invention utilizes the scraps of ALC panels, which are generated in large quantities at lightweight cellular concrete (hereinafter abbreviated as ALC) manufacturing plants and construction sites and are disposed of as industrial waste. This relates to the effective recovery and reuse of raw materials for the production of ALC.
【０００２】0002
【従来の技術】ＡＬＣは、珪石、珪砂等の珪酸質原料と
、石灰やセメント等の石灰質原料を適当な水と共に混合
してスラリーとしたものに金属アルミニウム粉末等の発
泡剤を加えて発泡半硬化させたものを、ピアノ線カッタ
ー等の切断機で所定の寸法に切断した後、これをオート
クレーブにより高温高圧水蒸気養生させる事により、安
定した石灰−珪酸化合物を生成させて強固な化合物を得
るものである。このようにして得られた硬化物は、強度
、断熱性、耐火性、軽量性、加工性に優れていることか
ら、近年、建築材料として大きく成長している。[Prior Art] ALC is made by mixing silicic raw materials such as silica stone and silica sand, and calcareous raw materials such as lime and cement with appropriate water to form a slurry, and adding a foaming agent such as metal aluminum powder to form a foamed semi-solid material. The cured material is cut into specified dimensions using a cutting machine such as a piano wire cutter, and then cured with high temperature and high pressure steam in an autoclave to produce a stable lime-silicate compound and obtain a strong compound. It is. The cured product obtained in this way has excellent strength, heat insulation, fire resistance, lightness, and workability, and has therefore grown rapidly as a building material in recent years.
【０００３】ＡＬＣの製造に当たって、原料混合スラリ
ーに金属アルミニウム粉末等の発泡剤を加えて発泡半硬
化させる場合、均質な気泡を形成させるにはスラリーの
粘性を十分小さくする必要がある。そのために混水量を
多くする方法が一般的に採用されている。しかし、混水
量を多くすると系中の自由水が増加する事、熱容量が増
大し半硬化の温度上昇が小さくなる事等により、所定の
硬さになるまでの硬化時間が長くなり、生産性の低下を
引き起こしている。特に、オートクレーブで高温高圧水
蒸気養生を行った硬化体の端材や屑を湿式粉砕しスラリ
ー化して、原料に回収使用する場合は、混水量の増大を
伴い、生産性の低下を招く事から、その回収使用量が制
限され（従来は５〜１０％）、廃棄物の低減の障害にも
なっている。[0003] When producing ALC, when a foaming agent such as metal aluminum powder is added to a raw material mixed slurry to foam and semi-cure, the viscosity of the slurry must be sufficiently reduced in order to form homogeneous cells. For this purpose, a method of increasing the amount of mixed water is generally adopted. However, when the amount of mixed water is increased, the amount of free water in the system increases, the heat capacity increases, and the temperature rise during semi-curing becomes smaller, which lengthens the curing time to reach the desired hardness and reduces productivity. causing a decline. In particular, when wet-pulverizing scraps and scraps from cured products that have been cured with high-temperature, high-pressure steam in an autoclave and recovering them as raw materials, the amount of mixed water increases, resulting in a decrease in productivity. The amount recovered and used is limited (conventionally 5 to 10%), which is also an obstacle to waste reduction.
【０００４】0004
【発明が解決しようとする課題】ＡＬＣの製造現場で発
生した端材を産業廃棄物として処理するには、多額の費
用が必要になり、この事により製品のコストが上昇する
。そのため、原料回収率を上昇させる事が必要となる。
しかし、前項で述べた通り、従来の技術では原料への回
収率を上昇させると、モルタル粘度が増大し、粘度を下
げるため混水量を多くする必要があるので原料への回収
率範囲が低い部分に推移せざるをえない。[Problems to be Solved by the Invention] A large amount of money is required to dispose of scraps generated at ALC manufacturing sites as industrial waste, which increases the cost of the product. Therefore, it is necessary to increase the raw material recovery rate. However, as mentioned in the previous section, when increasing the recovery rate to raw materials with conventional technology, mortar viscosity increases, and it is necessary to increase the amount of water mixed in to lower the viscosity, so the range of recovery rate to raw materials is low. There is no choice but to move to .
【０００５】本発明の特徴は、モルタル粘度、混水量を
増大させずに原料回収率を上昇させることにある。[0005] A feature of the present invention is that the raw material recovery rate is increased without increasing the mortar viscosity or the amount of mixed water.
【０００６】[0006]
【課題を解決するための手段】本発明は、ＡＬＣ端材を
ＡＬＣの製造原料として回収する方法に於いて、ＡＬＣ
端材を乾式で粉砕し、乾燥粉末としてＡＬＣの製造原料
として使用することを特徴とするＡＬＣ端材の回収方法
であり、特に、ＡＬＣ端材を粉砕して得た乾燥粉末の含
水分が乾燥固形分ベースで２０重量％以下とすることを
特徴とするＡＬＣ端材の回収方法に係わる。[Means for Solving the Problems] The present invention provides a method for recovering ALC offcuts as a raw material for producing ALC.
This is a method for recovering ALC offcuts, which is characterized in that the offcuts are dry-pulverized and used as a dry powder as a raw material for producing ALC. The present invention relates to a method for recovering ALC offcuts characterized by a solid content of 20% by weight or less.
【０００７】本発明のＡＬＣ端材としては、珪石、珪砂
等の珪酸質原料と、石灰やセメント等の石灰質原料を適
当な水と共に混合してスラリーとしたものに金属アルミ
ニウム粉末等を加え発泡硬化させたものをオートクレー
ブ養生することによって得られるＡＬＣの、製造現場で
発生した任意の大きさ、形状の端材が使用しうる。本発
明の乾式粉砕とは、たとえば、ＡＬＣの切削粉を集め、
篩別するという方法があり、ＡＬＣの製造原料として使
用するためには、１．２ｍｍメッシュアンダーのものと
するのが好ましい。The ALC offcuts of the present invention are prepared by mixing silicic raw materials such as silica stone and silica sand, and calcareous raw materials such as lime and cement with appropriate water to form a slurry, adding metal aluminum powder, etc., and foaming and hardening. ALC scraps of any size and shape generated at the manufacturing site can be used by curing the ALC in an autoclave. The dry grinding of the present invention means, for example, collecting cutting powder of ALC,
There is a method of sieving, and in order to use it as a raw material for producing ALC, it is preferable to use a material with a mesh under size of 1.2 mm.
【０００８】[0008]
【実施例１及び比較例１】予め微粉砕された珪石（シリ
カ分９５％）粉１００重量部、セメント５９重量部、生
石灰１４重量部、アルミニウム粉０．１２重量部、水１
５０重量部を混合し、成形した後１８０℃、１０気圧、
１０時間のオートクレーブ処理を施した。得られた成形
品は、トバモライト含有率８０％の物であった。この成
形品を切断して得られる切削粉を収集し、１．２ｍｍメ
ッシュアンダーに篩別したものを乾式粉砕物とし、一方
、前記篩別後の切削粉に２２０ｗｔ％の水分を加えスラ
リーとしたものと、切削塊を２００〜３００ｗｔ％の水
分を加えて、ボールミルで粉砕したスラリーとを混合し
たものを湿式粉砕物とし、得られた湿式粉砕物、乾式粉
砕物をＡＬＣ量で６、１０、２０ｗｔ％となるように各
々原料中に添加し、上記組成にて成形した。それぞれの
粉砕物添加量は珪石に置換して粘度を測定した。その結
果からＡＬＣ粉無添加品と同じ粘度になる必要水分を算
出した。それを表１に示す。[Example 1 and Comparative Example 1] 100 parts by weight of pre-pulverized silica stone (95% silica) powder, 59 parts by weight of cement, 14 parts by weight of quicklime, 0.12 parts by weight of aluminum powder, 1 part by weight of water
After mixing 50 parts by weight and molding, the mixture was heated at 180°C and 10 atm.
Autoclave treatment was performed for 10 hours. The obtained molded article had a tobermorite content of 80%. The cutting powder obtained by cutting this molded product was collected and sieved through a 1.2 mm mesh under to form a dry pulverized product. On the other hand, 220 wt% of water was added to the sieved cutting powder to form a slurry. A wet pulverized product is obtained by mixing the cut lump with a slurry obtained by adding 200 to 300 wt% of water and pulverizing it in a ball mill. Each was added to the raw materials at a concentration of 20 wt%, and molded with the above composition. The added amount of each crushed material was replaced with silica stone and the viscosity was measured. From the results, the required water content to achieve the same viscosity as the product without ALC powder additive was calculated. It is shown in Table 1.
【０００９】また、表１から山崎式回転粘度計粘度５４
０（ｇ．ｃｍ）値必要水分を算出した。比較例では粉砕
物添加量に比例して多量の水分が必要となるが、これに
対し実施例では比較例の１／２ほどの上昇であった。そ
こで、必要水分値による条件で硬化速度を測定した。そ
の注入から１１０分後の硬度を土壌式硬度（＝貫入抵抗
値）として測定した結果を表２に示す。[0009] Also, from Table 1, the Yamazaki rotational viscometer viscosity 54
0 (g.cm) value required moisture was calculated. In the comparative example, a large amount of water is required in proportion to the amount of pulverized material added, but in contrast, in the example, the increase was about 1/2 of that in the comparative example. Therefore, the curing rate was measured under conditions based on the required moisture value. Table 2 shows the results of measuring the hardness 110 minutes after the injection as soil hardness (=penetration resistance value).
【００１０】この表より、従来技術の上限である１０％
湿式粉砕添加では、１１０分値硬度は１１となる。それ
に対し乾式粉砕添加２０％では、１１０分値硬度は１２
となるので、従来の製造条件と同じ粘度で同等な硬度を
得るのに乾式の方が２倍強多く粉砕物を添加する事が可
能になる。[0010] From this table, it can be seen that the upper limit of the conventional technology is 10%.
When wet-pulverized and added, the 110-minute hardness is 11. On the other hand, with 20% dry grinding addition, the 110 minute hardness is 12
Therefore, in order to obtain the same hardness with the same viscosity as under conventional manufacturing conditions, it is possible to add a little more than twice as much crushed material in the dry method.
【００１１】[0011]
【表１】[Table 1]
【００１２】0012
【表２】[Table 2]
【００１３】[0013]
【発明の効果】本発明の方法によれば、発生した多量の
端材の回収量を多くする事が出来ると共に、モルタルの
硬化時間短縮の面でも効果があり、資源の再利用、製造
コストの低減に役立つ。また、ＡＬＣの乾燥粉末の含水
分は、乾燥固形分ベースで、２０重量％以下とするのが
好ましく、含水分は少ない程よい。このようにして、得
られた乾燥粉末は、ＡＬＣ製造原料に対し、２０ｗｔ％
程度まで添加することが可能となる。[Effects of the Invention] According to the method of the present invention, it is possible to increase the amount of collected scraps, and it is also effective in shortening the hardening time of mortar, reusing resources and reducing manufacturing costs. Helps reduce Further, the moisture content of the dry powder of ALC is preferably 20% by weight or less on a dry solid content basis, and the lower the moisture content, the better. In this way, the obtained dry powder was 20wt% based on the ALC manufacturing raw material.
It becomes possible to add up to a certain extent.
【００１４】[0014]
【作 用】ＡＬＣ乾燥粉末を水に投入した場合、水を
吸収するがその速度は余り速くない。これについては、
ＡＬＣはトバモライトの板状結晶で出来ているため極め
て微細なミクロポアーが存在しこの中に水が入っていく
のに時間がかかるためと考えられる。そのため、乾燥し
た粉末状でモルタル中に混合すると、混合初期の粘度は
余り上がらない。従って、多量に混入する事が出来る。[Operation] When ALC dry powder is added to water, it absorbs water, but the rate of absorption is not very fast. Regarding this,
This is thought to be because ALC is made of plate-shaped crystals of tobermorite, so there are extremely fine micropores, and it takes time for water to enter these pores. Therefore, when mixed into mortar in dry powder form, the viscosity does not increase much at the initial stage of mixing. Therefore, it can be mixed in a large amount.
【００１５】一方、湿式粉砕では、水とＡＬＣ粉末との
接触時間が長いため、ゲル化反応が進み、粘度が増大し
てしまい、混水量を多くし、粘度を下げる必要がある。On the other hand, in wet pulverization, the contact time between water and ALC powder is long, so the gelation reaction progresses and the viscosity increases, so it is necessary to increase the amount of mixed water to lower the viscosity.
Claims (1)
コンクリートの製造原料として回収する方法に於いて、
軽量気泡コンクリート端材を乾式で粉砕し乾燥粉末とし
て軽量気泡コンクリートの製造原料として使用すること
を特徴とする軽量気泡コンクリート端材の回収方法。[Claim 1] A method for recovering lightweight cellular concrete scraps as a raw material for manufacturing lightweight cellular concrete, comprising:
A method for recovering lightweight cellular concrete scraps, which comprises dry-pulverizing the lightweight cellular concrete scraps and using the dry powder as a raw material for manufacturing lightweight cellular concrete.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3131050A JPH04357149A (en) | 1991-06-03 | 1991-06-03 | Method for recovering remnant material of lightweight cellular concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3131050A JPH04357149A (en) | 1991-06-03 | 1991-06-03 | Method for recovering remnant material of lightweight cellular concrete |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04357149A true JPH04357149A (en) | 1992-12-10 |
Family
ID=15048845
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3131050A Withdrawn JPH04357149A (en) | 1991-06-03 | 1991-06-03 | Method for recovering remnant material of lightweight cellular concrete |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04357149A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003055027A (en) * | 2001-08-08 | 2003-02-26 | Sumitomo Kinzoku Kozan Siporex Kk | Calcium silicate based raw material utilizing alc scrap wood, production method therefor and method for producing alc using the same raw material |
-
1991
- 1991-06-03 JP JP3131050A patent/JPH04357149A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003055027A (en) * | 2001-08-08 | 2003-02-26 | Sumitomo Kinzoku Kozan Siporex Kk | Calcium silicate based raw material utilizing alc scrap wood, production method therefor and method for producing alc using the same raw material |
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