JPS5825568B2 - Lining method - Google Patents
Lining methodInfo
- Publication number
- JPS5825568B2 JPS5825568B2 JP1063376A JP1063376A JPS5825568B2 JP S5825568 B2 JPS5825568 B2 JP S5825568B2 JP 1063376 A JP1063376 A JP 1063376A JP 1063376 A JP1063376 A JP 1063376A JP S5825568 B2 JPS5825568 B2 JP S5825568B2
- Authority
- JP
- Japan
- Prior art keywords
- cement
- lining
- mortar
- gypsum
- weight
- 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
- 238000000034 method Methods 0.000 title claims description 10
- 239000004568 cement Substances 0.000 claims description 12
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 claims description 9
- 239000011083 cement mortar Substances 0.000 claims description 8
- 239000003795 chemical substances by application Substances 0.000 claims description 8
- 229910052602 gypsum Inorganic materials 0.000 claims description 7
- 239000010440 gypsum Substances 0.000 claims description 7
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 5
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical group [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 claims description 5
- 229910052593 corundum Inorganic materials 0.000 claims description 5
- 230000005484 gravity Effects 0.000 claims description 5
- 229910001845 yogo sapphire Inorganic materials 0.000 claims description 5
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 3
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 8
- 239000004570 mortar (masonry) Substances 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 239000000203 mixture Substances 0.000 description 5
- 239000000292 calcium oxide Substances 0.000 description 4
- 235000012255 calcium oxide Nutrition 0.000 description 4
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 229910052925 anhydrite Inorganic materials 0.000 description 2
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Natural products OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 229910000027 potassium carbonate Inorganic materials 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- PXRKCOCTEMYUEG-UHFFFAOYSA-N 5-aminoisoindole-1,3-dione Chemical compound NC1=CC=C2C(=O)NC(=O)C2=C1 PXRKCOCTEMYUEG-UHFFFAOYSA-N 0.000 description 1
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 239000011398 Portland cement Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 229910001570 bauxite Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 238000001879 gelation Methods 0.000 description 1
- 230000006911 nucleation Effects 0.000 description 1
- 238000010899 nucleation Methods 0.000 description 1
- 239000011505 plaster Substances 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
Landscapes
- Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Description
【発明の詳細な説明】
本発明は重力倍数１０以下の低速で回転する金属管（主
に鋳鉄管または鋼管）内面を、セメントモルタルでライ
ニングした際に発生するレイタンス量を抑制できるライ
ニング方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a lining method that can suppress the amount of laitance that occurs when lining the inner surface of a metal pipe (mainly a cast iron pipe or steel pipe) rotating at a low speed with a gravity multiple of 10 or less with cement mortar. It is.
従来鉄管の内面にセメントモルタルをライニングするた
めには、普通セメントモルタルをライニング管の内面に
均等に振り付け、次いで管を通常、重力倍数２０以上の
高速で回転し、管内面にモルタルを強（遠心圧着する方
法が採用されてきた。Conventionally, in order to line the inner surface of an iron pipe with cement mortar, ordinary cement mortar is spread evenly on the inner surface of the lining pipe, and then the pipe is usually rotated at a high speed of 20 or more, and the mortar is applied to the inner surface of the pipe by force (centrifugation). A method of crimping has been adopted.
ところがこのような高遠心力を特に大口径管に作用させ
るためには、鉄管の撓み防止用の補強タイヤを取り付け
ねばならないという煩雑さを伴ったり、騒音公害の問題
が生ずる。However, in order to apply such a high centrifugal force to a particularly large-diameter pipe, it is complicated to install reinforcing tires to prevent the iron pipe from bending, and problems of noise pollution arise.
この問題解決のため、市販の超早強セメント（商品名ジ
ェットセメント）を使用して低速で遠心する方法が提案
されているが、この方法ではライニング後のモルタル層
に大量のレイタンスが生成する結果、該層が軟弱となっ
て面を研摩してシールコート剤を塗布してもこれが剥離
しやすくなったり、研摩時に大量のレイタンスを処理し
なければならないという新たな問題が生じた。To solve this problem, a method has been proposed that uses a commercially available ultra-fast cement (trade name: Jet Cement) and centrifuges it at low speed, but this method results in the formation of a large amount of laitance in the mortar layer after lining. New problems arose in that the layer became soft and easily peeled off even if the surface was polished and a seal coat agent was applied, and a large amount of laitance had to be treated during polishing.
本発明は、この問題を解消できるライニング方法を提案
するものであり、その要旨は、重力倍数１０以下の低速
で回転する金属管内面に、ＣａＯ／Ａｌ２Ｏ３の重量比
（化学分析値）が０．５〜Ｉである無定形カルシウムア
ルミネートに対して石膏が０．３〜２重量倍からなるセ
メント急結剤を含有させたセメントモルタルを振り付け
、遠心するものである。The present invention proposes a lining method that can solve this problem, and its gist is to line the inner surface of a metal tube rotating at a low speed with a gravity multiple of 10 or less with a CaO/Al2O3 weight ratio (chemical analysis value) of 0. A cement mortar containing a cement quick-setting agent consisting of 0.3 to 2 times the weight of gypsum to the amorphous calcium aluminate (5 to I) is distributed and centrifuged.
以下詳しく本発明を説明する。The present invention will be explained in detail below.
本発明においては、ＣａＯ／Ａｌ２Ｏ３の重量比が０．
５〜１である無定形カルシウムアルミネートを使用する
ことが大きな特徴である。In the present invention, the weight ratio of CaO/Al2O3 is 0.
A major feature is the use of amorphous calcium aluminate having a molecular weight of 5 to 1.
該層がこれよりも小さいと強度発現が悪くなり、またこ
れよりも多いとレイタンス発生の防止効果が極端に小さ
くなる。If the layer is smaller than this, strength development will be poor, and if it is larger than this, the effect of preventing laitance generation will be extremely small.
また該比が前記した範囲内であるカルシウムアルミネー
トであっても、それを結晶化させたものはレイタンス発
生の防止効果が小さい。Further, even if calcium aluminate has the ratio within the above-mentioned range, a crystallized version of the calcium aluminate has a small effect of preventing the generation of laitance.
このような無定形カルシウムアルミネートは、ＣａＯ源
とＡｌ２Ｏ３源とをほぼ化学量論的に混合し完全に溶融
したのち、急冷することによって得られる。Such amorphous calcium aluminate can be obtained by mixing a CaO source and an Al2O3 source almost stoichiometrically, completely melting the mixture, and then rapidly cooling the mixture.
このような無定形カルシウムアルミネートに対する石膏
の割合は、無定形カルシウムアルミネートの重量に対し
て０．３〜２倍の範囲である。The ratio of gypsum to such amorphous calcium aluminate ranges from 0.3 to 2 times the weight of the amorphous calcium aluminate.
これよりも石膏量が少ないと急結性となってセメントモ
ルタルが不安定となり好ましくなく、またこれよりも多
いと強度発現が劣る。If the amount of gypsum is less than this, it will set rapidly and the cement mortar will become unstable, which is not preferable, and if it is more than this, the strength development will be poor.
またＣａｂ／Ａｌ２Ｏ３重量比が低い場合は石膏量を高
く、核化が高い場合はその逆となるように存在させると
よい。Also, when the Cab/Al2O3 weight ratio is low, the amount of gypsum is preferably high, and when nucleation is high, the opposite is true.
さらに使用する石膏の形態はどのようなものでもよいが
、強度発現とレイタンス発生の抑制から不溶性無水石膏
（硬石膏）が最も好ましく、また急結性が問題となる場
合は、無水石膏と半水石膏とを併用するか公知のレター
ダーを用いるとよい。Furthermore, any form of gypsum may be used, but insoluble anhydrite (anhydrite) is the most preferable from the viewpoint of strength development and suppression of laitance generation, and if rapid setting is a problem, anhydrite and hemihydrate It is best to use it in combination with plaster or a known letterer.
このような組成からなるセメント急結剤の粉末度はブレ
ーン値で４０００〜８０００ｃｒ１ｆ、／グが好ましく
、またこれのセメントへの配合量は３〜２０重量％程度
である。The fineness of the cement quick-setting agent having such a composition is preferably 4,000 to 8,000 cr1f/g in Blaine value, and the amount added to the cement is about 3 to 20% by weight.
またセメントモルタルには市販のセメント膨張材やフラ
イマツシュ、シリカ等の増量剤を添加することは一画に
差支えない。Furthermore, it is possible to add commercially available cement expansion agents, fly mats, fillers such as silica, etc. to the cement mortar.
本発明方法によると、重力倍数１０以下という低速でラ
イニングしてもモルタル層のレイタンス発生が少く、ま
た研摩後にシールコートを塗布してもそれが剥離しない
という効果がある。According to the method of the present invention, even when lining is performed at a low speed of gravity multiple of 10 or less, there is little laitance in the mortar layer, and even if a seal coat is applied after polishing, it does not peel off.
２ 以下実施例により本発明を説明する。 2 The present invention will be explained below with reference to Examples.
実施例
普通ポルトランドセメント２．３５に９、フライアッシ
ュ０．４１ｋｇ、セメント膨張材（電気化学工業■裂開
品名デンカＣ８Ａ＃２０ ） ０．２４ｋｇ、天燃砂７
．５０ｋｇおよび水１．３５ｋｇをモルタルミキサーで
混和し、これに第１表に示すような組成の異るセメント
急結剤２４０グ、水１２０グ、クエン酸３′ｆ？および
炭酸カリウム９グを混和したスラリーを添加し、十分に
両者を混合して急結性のモルタルを製造した。Example Ordinary Portland cement 2.35 to 9, fly ash 0.41 kg, cement expansion material (Denki Kagaku Kogyo splitting product name Denka C8A #20) 0.24 kg, natural sand 7
．． 50 kg and 1.35 kg of water were mixed in a mortar mixer, and 240 g of cement quick setting agents with different compositions as shown in Table 1, 120 g of water, and 3'f?citric acid were mixed. A slurry containing 9 g of potassium carbonate and 9 g of potassium carbonate was added thereto, and the two were thoroughly mixed to produce a rapid-setting mortar.
このモルタルのＪＩＳ Ｒ５２０１Ｑてよるフロー値
は約１７０ｍｍであった。The flow value of this mortar according to JIS R5201Q was about 170 mm.
次に該モルタルを内径２５５％、長さ５００Ｘの鉄管の
内面に約１３％の厚さになるように振りつげ、重力倍数
５でゲル化が起るまで（１０〜１５分間）遠心した（モ
ルタルの線上り温度は２１〜２５℃の範囲であった）。Next, the mortar was shaken to a thickness of about 13% on the inner surface of an iron pipe with an inner diameter of 255% and a length of 500X, and centrifuged at a gravity factor of 5 until gelation occurred (10 to 15 minutes). The line temperature was in the range of 21-25°C).
該ライニングした管を一昼夜室内に放置後、ライニング
面のレイタンス発生量を、スプーンで軟弱層をかき取っ
て測定した。After the lined tube was left indoors for a day and night, the amount of laitance generated on the lined surface was measured by scraping off the soft layer with a spoon.
またかき取り面に塩化ビニル系のシールコート材を塗布
して、１グ月後にその接着状態を観察した。In addition, a vinyl chloride seal coat material was applied to the scraped surface, and the adhesion state was observed after one month.
これらの結果を第１表に示す。実験／Ｖ；１〜４は本発
明例である。These results are shown in Table 1. Experiment/V; 1 to 4 are examples of the present invention.
なおセメント急結剤は、生石灰とボーキサイトとを種々
の割合で混合し、完全溶融したのち圧搾空気で吹飛し冷
却して得られた、それぞれＣａｂ／Ａｌ２Ｏ３重量比（
化学分析値）の異る無定形カルシウムアルミネートをブ
レーン値６０００ｃｒＡ／？程度に粉砕し、これに同程
度に粉砕した不溶性無水石膏を配合して製造したもので
ある。The cement quick setting agent is obtained by mixing quicklime and bauxite in various ratios, completely melting the mixture, blowing it off with compressed air, and cooling it.
The Blaine value of amorphous calcium aluminate with different chemical analysis values is 6000 crA/? It is manufactured by pulverizing to a certain extent and blending it with insoluble anhydrite which has been pulverized to the same extent.
Claims (1)
ＣａＯ／Ａｌ２Ｏ３の重量比（化学分析値）が０．５〜
１である無定形カルシウムアルミネートに対して石膏が
０．３〜２重量倍からなるセメント急結剤を含有させた
セメントモルタルを振り付け、遠心することを特徴とす
る金属管内面のライニング方法。 ２ 石膏が不溶性無水石膏であることを特徴とする特許
請求の範囲第１項記載のライニング方法。 ３ セメント急結剤をセメントに対して３〜２０重量％
配合したセメントモルタルを用いることを特徴とする特
許請求の範囲第１項または第２項記載のライニング方法
。[Claims] 1. On the inner surface of a metal tube rotating at a low speed with a gravity multiple of 10 or less,
CaO/Al2O3 weight ratio (chemical analysis value) is 0.5~
1. A method for lining the inner surface of a metal tube, characterized in that a cement mortar containing a cement quick-setting agent containing 0.3 to 2 times the weight of gypsum to the amorphous calcium aluminate of 1 is sprinkled and centrifuged. 2. The lining method according to claim 1, wherein the gypsum is insoluble anhydrite. 3. 3 to 20% by weight of cement quick setting agent based on cement.
The lining method according to claim 1 or 2, characterized in that a blended cement mortar is used.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1063376A JPS5825568B2 (en) | 1976-02-03 | 1976-02-03 | Lining method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1063376A JPS5825568B2 (en) | 1976-02-03 | 1976-02-03 | Lining method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5294318A JPS5294318A (en) | 1977-08-08 |
| JPS5825568B2 true JPS5825568B2 (en) | 1983-05-28 |
Family
ID=11755609
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1063376A Expired JPS5825568B2 (en) | 1976-02-03 | 1976-02-03 | Lining method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5825568B2 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54114532A (en) * | 1978-02-28 | 1979-09-06 | Denki Kagaku Kogyo Kk | Production of centrifugal concrete formed body |
| JPS57175762A (en) * | 1981-04-22 | 1982-10-28 | Denki Kagaku Kogyo Kk | Manufacture of steel pipe composite cylindrical body |
| JPS5844197A (en) * | 1981-09-10 | 1983-03-15 | 電気化学工業株式会社 | Tunnel concrete covering work method |
| JP2726466B2 (en) * | 1988-12-27 | 1998-03-11 | 電気化学工業株式会社 | Lining material composition |
| JP2726474B2 (en) * | 1989-02-15 | 1998-03-11 | 電気化学工業株式会社 | Lining material and method for manufacturing lining pipe using the same |
| JP2726475B2 (en) * | 1989-02-15 | 1998-03-11 | 電気化学工業株式会社 | Lining material and method of manufacturing lining tube using it |
| JP2006062888A (en) * | 2004-08-24 | 2006-03-09 | Taiheiyo Material Kk | Quick-hardening admixture and quick-hardening cement composition |
| JP4652239B2 (en) * | 2006-01-18 | 2011-03-16 | 電気化学工業株式会社 | Method for producing centrifugally formed concrete pipe |
-
1976
- 1976-02-03 JP JP1063376A patent/JPS5825568B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5294318A (en) | 1977-08-08 |
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