JPS647024B2 - - Google Patents
Info
- Publication number
- JPS647024B2 JPS647024B2 JP9474080A JP9474080A JPS647024B2 JP S647024 B2 JPS647024 B2 JP S647024B2 JP 9474080 A JP9474080 A JP 9474080A JP 9474080 A JP9474080 A JP 9474080A JP S647024 B2 JPS647024 B2 JP S647024B2
- Authority
- JP
- Japan
- Prior art keywords
- concrete product
- concrete
- producing
- aggregate
- water
- 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
Links
- 239000004567 concrete Substances 0.000 claims description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 14
- 239000004568 cement Substances 0.000 claims description 11
- 239000003638 chemical reducing agent Substances 0.000 claims description 9
- 239000000843 powder Substances 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 4
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 2
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 2
- 229910052791 calcium Inorganic materials 0.000 claims description 2
- 239000011575 calcium Substances 0.000 claims description 2
- 239000004571 lime Substances 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims 1
- 239000010410 layer Substances 0.000 description 9
- 239000002699 waste material Substances 0.000 description 6
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 description 4
- 239000011398 Portland cement Substances 0.000 description 4
- 238000005452 bending Methods 0.000 description 4
- 239000004927 clay Substances 0.000 description 4
- 239000000428 dust Substances 0.000 description 4
- 238000000465 moulding Methods 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- 239000002002 slurry Substances 0.000 description 4
- 238000001035 drying Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 238000005056 compaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical class O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 150000008055 alkyl aryl sulfonates Chemical class 0.000 description 1
- 239000012717 electrostatic precipitator Substances 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 238000009415 formwork Methods 0.000 description 1
- 239000011372 high-strength concrete Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
Landscapes
- Press-Shaping Or Shaping Using Conveyers (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Description
本発明は新規なコンクリート製品の製法に関す
る。
従来、横置きして回転する型枠内にコンクリー
トを投入し、コンクリート層をほヾゞ均一な厚さ
にしたのち高速回転によつてコンクリートを締固
める作業をするさい、その過程において、コンク
リート中の余剰水および微粒子は遠心力の作用で
管内面に押し出され、排出される。これらの排出
物は、水質汚濁防止法（法律138号、84号）およ
び廃棄物処理法（法律137号、71号）の施行に伴
なつて、これを処理せねばならず、そのために莫
大な設備と費用を要するのみならず、廃棄場所の
確保にも行詰りの状態になりつつある。従来は、
その対策として排出物のコンクリート製品への利
用方法についての研究が進められていたが、遠心
力製品において、排出物をコンクリートに混合し
て成形すると、管壁内層に構成する分離ペースト
層厚が増加して、この分離層を締固めるに要する
時間が長くなる。また、微粒子の多い分離層は乾
燥による収縮量も多いことから蒸気養生后の水分
の逸散によつて、内部コンクリート層と分離層に
剥離現象を生じるなどの問題がある。
本発明は、成形時にセメントペーストが分離せ
ず、短時間で締め固めることができ、内表面を平
滑に成形することができるコンクリート製品の製
法を提供しようとするもので、その要旨は、セメ
ント、細骨材、粗骨材、減水剤及び水からなるコ
ンクリート材料に比表面積が8000〜16000cm2／ｇ
の無機質微粉末をセメントペースト量１m3に対し
て250〜450Kg混入し、遠心力工法によつて成形す
ることにある。
本発明の方法で用いるセメント、細骨材、粗骨
材は、慣用のものであり、例えばセメントは普通
ポルトランドセメントを用い、細骨材は粒径５mm
以下、粗骨材は粒径５mm以上の骨材で、いずれも
一般に用いられているものを用いる。また減水剤
は、一般に用いられている種類のもので、例え
ば、アルキルアリルスルホン酸塩系のもの（商品
名マイテイー150）、芳香族多環縮合物スルホン酸
塩系のもの（商品名ポゾリス1400）である。さら
に、上記無機質微粉末は活性白土、セメント原料
の粉塵微粒子、活性シリカなどを用いることがで
きる。
上記無機質粉末は、その比表面積が8000〜
16000cm2／ｇが好ましく、8000cm2／ｇ未満では遠
心力成形時にスラリーが発生し、16000cm2／ｇを
越える場合は成形品の曲げ引張強度が低下する。
またセメントペースト量と骨材量との容積比は
40％〜60％が好ましく、40％以下ではコンクリー
ト打込み時の作業性が悪く、強度も不十分であ
り、60％以上になると乾燥収縮が大きく、不経済
である。
ペースト１m3中の無機質粉末量は250〜450Kgが
好ましく、250Kg以下では遠心力成形時にスラリ
ーが発生し、450Kg以上にすると分離ペースト層
が多くなり、しかも、その層の乾燥収縮が大き
い。
またペースト１m3中の水量は、380〜460Kgが好
適であり、380Kg以下ではコンクリート打込み時
の作業性が良くなり、締固めが不十分になり、
460Kg以上では強度低下が大きくなる。
ペースト１m3中の減水剤は10〜30Kgが好適で、
10Kg以下では減水効果がなく、強度が不十分であ
り、30Kg以上では不経済になる。
本発明で用いる膨脹材は、カルシウムサルフオ
ーアルミネート系又は石灰系のもので、例えばア
サノジプカル（商品名）、デンカCSA（商品名）、
小野田エクスパン（商品名）を併用することがで
き、その使用量は、ペースト１m3に対して、60〜
185Kg用いることが好ましく、20Kg／m3以下では
膨脹効率がなく、185Kg／m3以上にすると不経済
であり、導入応力の管理が難しくなる。
以下、実施例にもとづいて、本発明を一層詳細
に説明する。
実施例 １
普通ポルトランドセメントを用い、表−１に示
す仕様によつて外径200mm、厚さ40mm、長さ300mm
の無筋管を、管壁をコンクリート一層で締固めて
成形した。そのさい、無機質微粉末（活性白土）
の粉末度を記号イ〜ヘのように変えて、遠心力成
形時の高速回転時間、排出スラリー量、管壁の曲
げ引張度を測定した。減水剤としては、マイテイ
ー150を用いた。
その結果を表−１に示す。
The present invention relates to a novel method for producing concrete products. Conventionally, when concrete is poured into a horizontally rotating formwork, the concrete layer is made to a uniform thickness, and then the concrete is compacted by high-speed rotation. Excess water and particles are pushed out to the inner surface of the tube by centrifugal force and discharged. These discharges must be treated in accordance with the enforcement of the Water Pollution Control Law (Acts No. 138 and 84) and the Waste Management Act (Acts No. 137 and 71), which requires a huge amount of waste. Not only does this require equipment and expense, but it is also becoming difficult to secure a place to dispose of it. conventionally,
As a countermeasure, research has been underway on how to use waste materials in concrete products, but in centrifugal products, when waste products are mixed with concrete and molded, the thickness of the separation paste layer that forms the inner layer of the pipe wall increases. This increases the time required to compact this separation layer. In addition, since the separation layer with many fine particles shrinks a lot due to drying, there is a problem that the inner concrete layer and the separation layer may peel off due to the dissipation of moisture after steam curing. The present invention aims to provide a method for manufacturing a concrete product that does not separate the cement paste during molding, can be compacted in a short time, and can be molded with a smooth inner surface. Concrete material consisting of fine aggregate, coarse aggregate, water reducing agent and water has a specific surface area of 8,000 to 16,000 cm 2 /g.
The method involves mixing 250 to 450 kg of inorganic fine powder to 1 m 3 of cement paste and molding it using the centrifugal force method. The cement, fine aggregate, and coarse aggregate used in the method of the present invention are conventional ones. For example, the cement used is ordinary Portland cement, and the fine aggregate used has a particle size of 5 mm.
Hereinafter, coarse aggregate refers to aggregate with a grain size of 5 mm or more, which are commonly used. Water reducing agents are of commonly used types, such as those based on alkylaryl sulfonate (trade name Mighty 150) and those based on aromatic polycyclic condensate sulfonate (trade name Pozolith 1400). It is. Further, as the inorganic fine powder, activated clay, fine dust particles of cement raw materials, activated silica, etc. can be used. The above inorganic powder has a specific surface area of 8000~
16,000 cm 2 /g is preferable; if it is less than 8,000 cm 2 /g, slurry will be generated during centrifugal force forming, and if it exceeds 16,000 cm 2 /g, the bending tensile strength of the molded product will decrease. Also, the volume ratio between the amount of cement paste and the amount of aggregate is
40% to 60% is preferable; if it is less than 40%, workability during concrete pouring is poor and the strength is insufficient, and if it is more than 60%, drying shrinkage is large and it is uneconomical. The amount of inorganic powder in 1 m 3 of paste is preferably 250 to 450 kg; if it is less than 250 kg, slurry will be generated during centrifugal molding, and if it is more than 450 kg, there will be a large number of separated paste layers, and the drying shrinkage of that layer will be large. In addition, the suitable amount of water in 1 m 3 of paste is 380 to 460 kg; if it is less than 380 kg, workability during concrete pouring will be improved, and compaction will be insufficient.
If the weight exceeds 460Kg, the strength will decrease significantly. The suitable amount of water reducing agent in 1 m3 of paste is 10 to 30 kg.
If it is less than 10 kg, it will not have a water reduction effect and its strength will be insufficient, and if it is more than 30 kg, it will be uneconomical. The inflatable material used in the present invention is calcium sulfoaluminate-based or lime-based, such as Asano Zipcal (trade name), Denka CSA (trade name),
Onoda Expan (product name) can be used in conjunction with the product, and the amount used is 60~1 m3 of paste.
It is preferable to use 185Kg; if it is less than 20Kg/ m3 , there is no expansion efficiency, and if it is more than 185Kg/m3, it is uneconomical and it becomes difficult to manage the introduced stress. Hereinafter, the present invention will be explained in more detail based on Examples. Example 1 Using ordinary Portland cement, the outer diameter is 200 mm, the thickness is 40 mm, and the length is 300 mm according to the specifications shown in Table 1.
The unreinforced pipe was formed by compacting the pipe wall with a single layer of concrete. At that time, inorganic fine powder (activated clay)
The high-speed rotation time during centrifugal force forming, the amount of discharged slurry, and the bending tensile strength of the tube wall were measured while changing the powderiness as shown in symbols A to F. Mighty 150 was used as the water reducing agent. The results are shown in Table-1.
【表】
上表にみられるように比表面積8000／16000
cm2／ｇの活性白土を用いた場合には、それ未満の
比表面積のものを用いた場合に比して、高速回転
時間が短縮し、排出スラリー量も減少しており、
逆に越える場合に比して、引張強度が良好である
傾向を示している。
実施例 ２
普通ポルトランドセメントを用い、表−２に示
す仕様によつて、直径10cm、高さ20cmの円柱体
（圧縮強度測定用）と、外径200mm、厚さ40mm、長
さ300mmの無筋遠心力管（曲げ引張強度測定用）
と、内径250mm、厚さ28mm、長さ2000mmのＢ形ヒ
ユーム管（外圧強度測定用）を成形し、各供試体
を用いて圧縮強度、曲げ引張強度、および外圧強
度を測定した。微粉末としては、粉末度12600
cm2／ｇの活性白土を用い、減水剤としてマイテイ
ー150を用いた。
その結果を表−２および表−３に示す。[Table] As seen in the table above, specific surface area 8000/16000
When activated clay with a specific surface area of cm 2 /g is used, the high-speed rotation time is shortened and the amount of discharged slurry is also reduced, compared to when using one with a specific surface area smaller than that.
On the other hand, the tensile strength tends to be better than that in the case where it is exceeded. Example 2 Using ordinary Portland cement, a cylindrical body (for measuring compressive strength) with a diameter of 10 cm and a height of 20 cm and a plain cylinder with an outer diameter of 200 mm, a thickness of 40 mm, and a length of 300 mm were prepared according to the specifications shown in Table 2. Centrifugal force tube (for measuring bending tensile strength)
A B-shaped hume tube (for external pressure strength measurement) with an inner diameter of 250 mm, a thickness of 28 mm, and a length of 2000 mm was molded, and the compressive strength, bending tensile strength, and external pressure strength were measured using each specimen. As a fine powder, the fineness is 12600.
cm 2 /g of activated clay was used, and Mighty 150 was used as a water reducing agent. The results are shown in Table-2 and Table-3.
【表】【table】
【表】【table】
【表】
実施例 ３
無機質微粉末として、セメント工場内の排ガス
中に含まれる粉じんを電気集じん機で採取したも
のを用いた。該粉じんの物性は次のとおりであ
る。[Table] Example 3 As inorganic fine powder, dust contained in exhaust gas in a cement factory was collected using an electrostatic precipitator. The physical properties of the dust are as follows.
【表】
普通ポルトランドセメント330Kg／m3、上記粉
じん120Kg／m3、ペースト−骨材容積比43％、減
水剤（マイテイー150）6.75Kg／m3、骨材最大寸
法15mmの配合仕様によつて、供試ソケツト管Ａ，
Ｂを遠心力によつて成形し、ソケツト内面の平滑
性を考察した。その結果を表−４に示す。[Table] Ordinary Portland cement 330Kg/m 3 , above dust 120Kg/m 3 , paste-aggregate volume ratio 43%, water reducer (Mighty 150) 6.75Kg/m 3 , maximum aggregate size 15mm. , test socket pipe A,
B was molded by centrifugal force, and the smoothness of the inner surface of the socket was examined. The results are shown in Table 4.
【表】【table】
【表】
本発明の方法は、コンクリート製品を成形する
にあたつて、遠心力工法によるほか、振動工法又
は振動加圧工法を用いることができ、いずれの工
法によつても、その効果は変らない。
本発明は、管、パイルに適用することができ、
とくにこれをソケツト管に適用した場合に、受口
の内面を平滑に成形できるので好適である。
本発明によれば、締め固め時に排出物が生ずる
ことがなく、極めて短時間に、強度の高い管、パ
イル等のコンクリート製品を製造することができ
る。したがつて、排出物処理のための設備を必要
とせず、成形用型枠の稼動率を高めることができ
る。[Table] In forming concrete products, the method of the present invention can use not only the centrifugal force method but also the vibration method or the vibration pressure method, and the effect will not change with either method. do not have. The present invention can be applied to pipes, piles,
In particular, when this is applied to a socket pipe, it is suitable because the inner surface of the socket can be molded smoothly. According to the present invention, high-strength concrete products such as pipes and piles can be manufactured in an extremely short time without producing waste during compaction. Therefore, there is no need for equipment for waste treatment, and the operating rate of the molding frame can be increased.
Claims (1)
らなるコンクリート材料に比表面積が8000〜
16000cm2／ｇの無機質微粉末をセメントペースト
量１m3に対して250〜450Kg混入し、遠心力工法に
よつて成形することを特徴とするコンクリート製
品の製造方法。 ２ 無機質微粉末を含むセメントペースト量を骨
材量で徐した容積比が40％〜60％であることを特
徴とする特許請求の範囲第１項記載のコンクリー
ト製品の製造方法。 ３ セメントペースト量１m3に対して、水が380
〜460Kg、減水剤が10〜30Kgの割合で、それぞれ
含有することを特徴とする特許請求の範囲第１項
又は第２項記載のコンクリート製品の製造方法。 ４ カルシウムサルフオーアルミネート系又は石
灰系の膨張材をペースト１m3に対して、60〜185
Kg混入することを特徴とする特許請求請求の範囲
第１項ないし第３項のいずれかに記載のコンクリ
ートの製造方法。 ５ 常圧蒸気養生又は自然養生することを特徴と
する特許請求の範囲第１項ないし第４項のいずれ
かに記載のコンクリート製品の製造方法。 ６ 遠心力工法に代えて振動工法又は振動加圧工
法によつて成形することを特徴とする特許請求の
範囲第１項ないし第５項のいずれかに記載のコン
クリート製品の製造方法。[Claims] 1. Concrete material consisting of cement, fine aggregate, coarse aggregate, water reducing agent and water has a specific surface area of 8000~
A method for producing a concrete product, characterized in that 250 to 450 kg of 16000 cm 2 /g of inorganic fine powder is mixed into 1 m 3 of cement paste, and the mixture is formed by a centrifugal force method. 2. The method for producing a concrete product according to claim 1, wherein the volume ratio of the amount of cement paste containing inorganic fine powder divided by the amount of aggregate is 40% to 60%. 3 Water is 380% for 1m3 of cement paste
The method for producing a concrete product according to claim 1 or 2, characterized in that the concrete product contains 10 to 30 kg of water reducing agent and 10 to 30 kg of water reducing agent, respectively. 4 Calcium sulfoaluminate-based or lime-based expanding material is applied at a rate of 60 to 185% per 1 m3 of paste.
A method for producing concrete according to any one of claims 1 to 3, characterized in that Kg is mixed therein. 5. A method for producing a concrete product according to any one of claims 1 to 4, characterized by carrying out atmospheric pressure steam curing or natural curing. 6. The method for manufacturing a concrete product according to any one of claims 1 to 5, characterized in that the concrete product is formed by a vibration method or a vibration pressure method instead of the centrifugal method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9474080A JPS5720305A (en) | 1980-07-11 | 1980-07-11 | Manufacture of concrete product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9474080A JPS5720305A (en) | 1980-07-11 | 1980-07-11 | Manufacture of concrete product |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5720305A JPS5720305A (en) | 1982-02-02 |
| JPS647024B2 true JPS647024B2 (en) | 1989-02-07 |
Family
ID=14118506
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9474080A Granted JPS5720305A (en) | 1980-07-11 | 1980-07-11 | Manufacture of concrete product |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5720305A (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5969457A (en) * | 1982-10-09 | 1984-04-19 | 電気化学工業株式会社 | Centrifugal molding process |
| JPS5969458A (en) * | 1982-10-14 | 1984-04-19 | 電気化学工業株式会社 | Grout mortar workability improvement |
| JPS60234808A (en) * | 1984-05-08 | 1985-11-21 | 前田製管株式会社 | Manufacture of high-strength concrete beam |
| JPS6121951A (en) * | 1984-07-06 | 1986-01-30 | 電気化学工業株式会社 | Super high strength internal pressure pipe |
| JPS6121950A (en) * | 1984-07-06 | 1986-01-30 | 電気化学工業株式会社 | High strength mortar or concrete member |
| JPS627654A (en) * | 1985-07-03 | 1987-01-14 | 太平洋セメント株式会社 | Manufacture of centrifugally formed concrete product |
| JPS643043A (en) * | 1987-06-24 | 1989-01-06 | Osaka Cement Co Ltd | Hydrofluoric acid anhydrous gypsum composition |
-
1980
- 1980-07-11 JP JP9474080A patent/JPS5720305A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5720305A (en) | 1982-02-02 |
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