JPS60218100A - Method of kneading cement - Google Patents

Method of kneading cement

Info

Publication number
JPS60218100A
JPS60218100A JP7448084A JP7448084A JPS60218100A JP S60218100 A JPS60218100 A JP S60218100A JP 7448084 A JP7448084 A JP 7448084A JP 7448084 A JP7448084 A JP 7448084A JP S60218100 A JPS60218100 A JP S60218100A
Authority
JP
Japan
Prior art keywords
cement
ice
water
dry
mixed
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.)
Granted
Application number
JP7448084A
Other languages
Japanese (ja)
Other versions
JPH0380403B2 (en
Inventor
宇都宮 透
直 岡本
正典 樋口
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsui Construction Co Ltd
Original Assignee
Mitsui Construction Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsui Construction Co Ltd filed Critical Mitsui Construction Co Ltd
Priority to JP7448084A priority Critical patent/JPS60218100A/en
Publication of JPS60218100A publication Critical patent/JPS60218100A/en
Publication of JPH0380403B2 publication Critical patent/JPH0380403B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。
(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【発明の詳細な説明】 (a)0発明の技術分野 本発明は、トリチウム水溶液等の放射性廃棄物水溶液を
セメントにより凝固処理する際等に適用するに好適なセ
メントの混練方法に関する。
DETAILED DESCRIPTION OF THE INVENTION (a) 0 Technical Field of the Invention The present invention relates to a cement kneading method suitable for use in coagulating a radioactive waste aqueous solution such as a tritium aqueous solution with cement.

(b)、技術の背景 トリチウム水溶液等の放射性廃棄物水溶液を処理する場
合、通常、当該水溶液を用いてセメントを水練し、水練
された状態のセメントをドラム管等の容器中に投入し、
その状態で凝固させて保 1存している。
(b), Background of the Technology When treating radioactive waste aqueous solutions such as tritium aqueous solutions, usually cement is kneaded using the aqueous solution, and the kneaded cement is put into a container such as a drum pipe.
It is stored in that state by solidifying it.

本来、セメントを水により混練する際には、セメントと
水の水和反応に必要な水の理論水和量はセメント重量の
30%程度であるが、混線後におけるセメントのワーカ
ビリティを確保する為に、通常の場合、重量比で50〜
60%程度の水が用いられる。
Originally, when mixing cement with water, the theoretical hydration amount of water required for the hydration reaction between cement and water is about 30% of the cement weight, but in order to ensure the workability of cement after mixing. In normal cases, the weight ratio is 50~
About 60% water is used.

(C)、従来技術と問題点 しかし、理論水和量以上の水でセメントを水練すると、
水練時に空気が彎き込まれ、凝固後のセメントの空隙が
増大して、セメント全体の強度が低下する不都合が有っ
た。また、水練自体、放射性廃棄物を含む水で行うこと
から、作業後にミキサー内に付着したセメントを清掃除
去すると、その除去物にも放射性物質が含まれることに
なり、2次廃棄物が生じることになる。
(C), Prior art and problems However, when cement is kneaded with water exceeding the theoretical hydration amount,
There was a disadvantage that air was drawn in during water mixing, increasing the voids in the cement after solidification, and reducing the strength of the cement as a whole. In addition, since the water mixing itself is carried out using water containing radioactive waste, if cement adhering to the mixer is cleaned and removed after work, the removed material will also contain radioactive materials, creating secondary waste. become.

(d)6発明の目的 本発明は、前述の欠点を解消すべく、論理水和量程度の
水でセメントを十分反応固化させることが出来、混線に
よる空隙の発生も無く密実なセメント硬化物を得ること
が出来、従ってセメント硬化後の強度を高めることが可
能なセメントの混線方法を提供することを第1の目的と
し、セメントと混練する水として、放射性廃棄物水溶液
を用いた場合でも安全性が高く、ミキサーの清掃による
2次廃棄物の発生も大幅に少なくすることが出来る、セ
メントの混線方法を提供することを第2の目的とするも
のである。
(d) 6 Purpose of the Invention In order to eliminate the above-mentioned drawbacks, the present invention is capable of sufficiently reacting and solidifying cement with water at a theoretical hydration level, and producing a dense cement hardened product without the generation of voids due to crosstalk. Our first objective is to provide a cement mixing method that can obtain A second object of the present invention is to provide a method for mixing cement, which has high performance and can significantly reduce the generation of secondary waste due to cleaning of the mixer.

(e)0発明の構成 即ち、本発明は、セメントと骨材との空練りを氷点下の
雰囲気中で行い、その際に、微粒子化させtこ氷をセメ
ント中に投入して空練りし、当該空線りの完了したセメ
ントを同様に氷点下の雰囲気で型枠中に投入して圧縮形
成し、その後加熱してセメント中に混入された氷を溶解
させることにより、当該溶解した氷と周囲のセメントを
反応させてセメントを固化させるようにして構成される
(e) 0 Structure of the invention That is, the present invention performs dry kneading of cement and aggregate in a sub-zero atmosphere, and at that time, adds finely divided ice into the cement and performs dry kneading, The cement that has been dry-wired is similarly put into a formwork in a sub-zero atmosphere, compressed and formed, and then heated to melt the ice mixed into the cement. It is constructed in such a way that it reacts with cement to solidify it.

(f)0発明の実施例 以下、本発明の実施例を、具体的に説明する。(f) 0 Examples of the invention Examples of the present invention will be specifically described below.

セメントを混練するには、まず乾燥状態でセメントに砂
等の骨材を投入して空練りを行う。この空練りはセメン
トと骨材を均等に混合することを目的とするが、この空
練りに際して、微粒子状態の氷を同時にセメント中に投
入して混合する。
To mix cement, first add aggregate such as sand to the dry cement and perform dry mixing. The purpose of this dry mixing is to mix cement and aggregate evenly, and during this dry mixing, ice in the form of fine particles is simultaneously added to the cement and mixed.

この作業は、氷点下の状態で行われ、従って、セメント
と混合される氷は固体としてセメント及びその他の骨材
と混合される。氷の粒度は、セメントとばば同様のもの
が望ましく、こうしに粒度の氷の製造は、超音波振動を
液体状態の水に与えて霧化させ、当該霧化した水を瞬間
的に冷却して製造する。
This operation is carried out in sub-zero conditions, so that the ice mixed with the cement is mixed as a solid with the cement and other aggregates. The grain size of the ice is preferably similar to that of cement, and to produce ice with this grain size, ultrasonic vibrations are applied to liquid water to atomize it, and the atomized water is instantly cooled. Manufactured by

このように、微粒子状の氷とセメント並びに骨材との氷
点下における空練りが完了すると、同様に氷点下の雰囲
気で当該空線りの完了したセメントを型枠中に投入し、
圧縮形成する。次に、圧縮形成の完了したセメントを強
制的又は自然的に加熱すると、圧縮形成されたセメント
中の氷が解けて水になり、周囲のコンクリートと水和反
応を起こし、凝固硬化する。コンクリート中の氷は空練
りによってコンクリートに対して十分に均一に混ぜ合わ
されているので、理論水和量程度の水でコンクリートは
十分に水和反応を引き起こし、固化する。
In this way, once the dry kneading of the fine particulate ice, cement, and aggregate at sub-zero temperatures is completed, the dry-kneaded cement is similarly poured into the formwork in a sub-zero atmosphere, and
Compression forming. Next, when the compressed cement is forcibly or naturally heated, the ice in the compressed cement melts and becomes water, causing a hydration reaction with the surrounding concrete and solidifying and hardening. Since the ice in the concrete is thoroughly and uniformly mixed with the concrete by dry mixing, the concrete will sufficiently cause a hydration reaction and harden with water in the theoretical hydration amount.

なお、コンクリートと共に凝固させる水としてトリチウ
ム水溶液を用いた場合には、当該水溶液を微粒子状の氷
にして前述と同様にセメントと空練りし、その空練りの
終了したセメントをドラム管等の核廃索物容器に投入し
、突き固めて密封し、その後加熱して氷を溶解させるこ
とにより、セメントとトリチウム水溶液が反応してセメ
ントが凝固し、トリチウム水溶液は容器内のセメント中
に封止される。
In addition, when a tritium aqueous solution is used as water to coagulate with concrete, the aqueous solution is made into fine particle ice and mixed with cement in the same manner as described above, and the dry-mixed cement is placed in a nuclear waste container such as a drum pipe. The cement is placed in a container, tamped and sealed, and then heated to melt the ice, causing the cement and tritium solution to react, solidifying the cement, and sealing the tritium solution in the cement in the container. .

(g)0発明の効果 以上、説明したように、本発明によれば、セメントと骨
材との空練りを氷点下の雰囲気中で行い、その際に、微
粒子化させた氷をセメント中に投入して空練りし、当該
空線りの完了したセメントを同様に氷点下の雰囲気で核
゛廃棄物容襞等の型枠中に投入して圧縮形成し、その後
加熱してセメント中に混入された氷を溶解させることに
より、当該溶解した氷と周囲のセメントを反応させてセ
メントを固化させるようにして構成したので、セメント
を理論水和量程度の水で十分反応固化させることが出来
る。また、セメントの水による水練作業が無いので、セ
メント中に空気が混入することもなく、従って空隙の発
生も無く密実なセメント硬化物を得ることが出来、セメ
ントの硬化後の強度を大幅に高める乙とが可能となる。
(g) 0 Effects of the Invention As explained above, according to the present invention, cement and aggregate are mixed in air in a sub-zero atmosphere, and at that time, micronized ice is poured into the cement. The dry-mixed cement was similarly put into a formwork for a nuclear waste container in a sub-zero atmosphere, compressed and formed, and then heated and mixed into the cement. By melting the ice, the melted ice reacts with the surrounding cement to solidify the cement, so that the cement can be sufficiently reacted and solidified with water of about the theoretical hydration amount. In addition, since there is no mixing of cement with water, air does not get mixed into the cement, and therefore, a dense hardened cement product can be obtained without the generation of voids, greatly increasing the strength of the cement after hardening. It becomes possible to increase the

また、論理水和量・程度の水でセメントが凝固されるの
で、論理水和量以上の水でセメントを凝固させた場合に
その後生じる余剰水分の蒸発が少なく、水としてトリチ
ウム水溶液等の放射性廃棄物を用いた場合でも、セメン
トの凝固後における、余剰水分の蒸発に伴う廃棄物の浸
出が少なくなり、安全性が高い。更に、水による水練が
無いので、セメントがミキサーに付着することが少なく
、従って、ミキサーの清掃による2次廃索物の発生も大
幅に少なくすることが可能となる。
In addition, since cement is solidified with water at a theoretical hydration level, there is less evaporation of excess water that occurs when cement is solidified with water at a logical hydration level or higher, and radioactive waste such as tritium aqueous solutions can be disposed of as water. Even when cement is used, there is less leaching of waste due to evaporation of excess water after solidification of cement, resulting in high safety. Furthermore, since there is no mixing with water, cement is less likely to adhere to the mixer, and therefore, it is possible to significantly reduce the generation of secondary cable waste due to cleaning of the mixer.

また、凝固後のセメントの靭性を確保するために、空練
り時にスチールファイバー等の高性能繊維材料を骨材と
して混入させるように構成することも当然可能である。
Furthermore, in order to ensure the toughness of the cement after solidification, it is naturally possible to mix a high-performance fiber material such as steel fiber as an aggregate during dry kneading.

なお、本発明はトリチウム水溶液等の核廃棄物の処理に
限らず、論理水和量程度の水の量でセメントを固化凝固
させる必要が有る全ての場合に適用することが出来るこ
とは勿論である。
It should be noted that the present invention is not limited to the treatment of nuclear waste such as tritium aqueous solution, but can of course be applied to all cases where it is necessary to solidify and coagulate cement with an amount of water approximately equal to the logical hydration amount. .

出願人 三井建設株式会社 代理人 弁理士 相1)伸二Applicant: Mitsui Construction Co., Ltd. Agent Patent Attorney Phase 1) Shinji

Claims (2)

【特許請求の範囲】[Claims] (1)、セメントと骨材との空練りを氷点下の雰囲気中
で行い、その際に、微粒子化させた氷をセメント中に投
入して空練りし、当該空線りの完了したセメントを同様
に氷点下の雰囲気で型枠中に投入して圧縮形成し、その
後加熱してセメント中に混入された氷を溶解させること
により、当該溶解した氷と周囲のセメントを反応させて
セメントを固化させるようにして構成したセメントの混
練方法。
(1) Dry kneading of cement and aggregate is carried out in a sub-zero atmosphere. At that time, micronized ice is added to the cement and the dry kneading is carried out. After the dry mixing is completed, the cement is similarly mixed. The cement is put into a formwork in a sub-zero atmosphere and compressed, and then heated to melt the ice mixed into the cement, causing the melted ice to react with the surrounding cement and solidifying the cement. A method for kneading cement composed of
(2)、氷が放射性廃棄物水溶液から製造されたことを
特徴とする特許請求の範囲第1項記載のセメントの混線
方法。
(2) The cement crosstalk method according to claim 1, wherein the ice is produced from an aqueous radioactive waste solution.
JP7448084A 1984-04-13 1984-04-13 Method of kneading cement Granted JPS60218100A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7448084A JPS60218100A (en) 1984-04-13 1984-04-13 Method of kneading cement

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7448084A JPS60218100A (en) 1984-04-13 1984-04-13 Method of kneading cement

Publications (2)

Publication Number Publication Date
JPS60218100A true JPS60218100A (en) 1985-10-31
JPH0380403B2 JPH0380403B2 (en) 1991-12-24

Family

ID=13548474

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7448084A Granted JPS60218100A (en) 1984-04-13 1984-04-13 Method of kneading cement

Country Status (1)

Country Link
JP (1) JPS60218100A (en)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6149806A (en) * 1984-07-31 1986-03-11 鈴木 敏郎 Method of compounding mortars
JPS627682A (en) * 1985-07-03 1987-01-14 鈴木 敏郎 Method of blending and forming mortars
JPS6270278A (en) * 1985-09-17 1987-03-31 鈴木 敏郎 Method for molding mortars
JPS6270277A (en) * 1985-09-17 1987-03-31 鈴木 敏郎 Method for preparing mortars
JPS62133211A (en) * 1985-12-05 1987-06-16 Toshiro Suzuki Constructing method for compaction pile
JPS62158179A (en) * 1985-12-28 1987-07-14 鈴木 敏郎 Manufacture of fiber reinforced cementitious set matter
JPS62158180A (en) * 1985-12-28 1987-07-14 鈴木 敏郎 Manufacture of cementitious composition
JPS62158181A (en) * 1985-12-28 1987-07-14 鈴木 敏郎 Preparation of heavy concrete
JPS62158178A (en) * 1985-12-28 1987-07-14 鈴木 敏郎 Preparation of cement aqueous composition
JPS62176972A (en) * 1986-01-11 1987-08-03 鈴木 敏郎 Manufacture of low temperature resistant cement composition
JPS62184808A (en) * 1986-02-10 1987-08-13 三井建設株式会社 Manufacture of concrete-mortar
JPS62197539A (en) * 1986-02-25 1987-09-01 三井建設株式会社 Method for casting construction member
JPS62198407A (en) * 1986-02-25 1987-09-02 三井建設株式会社 Method of molding concrete-mortar member
JPS62212273A (en) * 1986-03-10 1987-09-18 三井建設株式会社 Manufacture of foamed concrete
JPH03223144A (en) * 1990-01-29 1991-10-02 Tomiyasu Honda Production of inorganic board
JP2015021877A (en) * 2013-07-22 2015-02-02 矢内 誠 Radioactive material removal device and method for solidifying radioactive contaminated water

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS535694A (en) * 1976-07-03 1978-01-19 Kiyuugo Tanaka Platinum wire used in combustible gas concentration measurements

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS535694A (en) * 1976-07-03 1978-01-19 Kiyuugo Tanaka Platinum wire used in combustible gas concentration measurements

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6149806A (en) * 1984-07-31 1986-03-11 鈴木 敏郎 Method of compounding mortars
JPS627682A (en) * 1985-07-03 1987-01-14 鈴木 敏郎 Method of blending and forming mortars
JPS6353924B2 (en) * 1985-09-17 1988-10-26 Toshiro Suzuki
JPS6270278A (en) * 1985-09-17 1987-03-31 鈴木 敏郎 Method for molding mortars
JPS6270277A (en) * 1985-09-17 1987-03-31 鈴木 敏郎 Method for preparing mortars
JPS62133211A (en) * 1985-12-05 1987-06-16 Toshiro Suzuki Constructing method for compaction pile
JPH0410928B2 (en) * 1985-12-05 1992-02-26
JPH0239964B2 (en) * 1985-12-28 1990-09-07 Toshiro Suzuki
JPH0239963B2 (en) * 1985-12-28 1990-09-07 Toshiro Suzuki
JPS62158178A (en) * 1985-12-28 1987-07-14 鈴木 敏郎 Preparation of cement aqueous composition
JPS62158179A (en) * 1985-12-28 1987-07-14 鈴木 敏郎 Manufacture of fiber reinforced cementitious set matter
JPS62158181A (en) * 1985-12-28 1987-07-14 鈴木 敏郎 Preparation of heavy concrete
JPS62158180A (en) * 1985-12-28 1987-07-14 鈴木 敏郎 Manufacture of cementitious composition
JPS62176972A (en) * 1986-01-11 1987-08-03 鈴木 敏郎 Manufacture of low temperature resistant cement composition
JPH0517192B2 (en) * 1986-01-11 1993-03-08 Toshiro Suzuki
JPS62184808A (en) * 1986-02-10 1987-08-13 三井建設株式会社 Manufacture of concrete-mortar
JPS62197539A (en) * 1986-02-25 1987-09-01 三井建設株式会社 Method for casting construction member
JPS62198407A (en) * 1986-02-25 1987-09-02 三井建設株式会社 Method of molding concrete-mortar member
JPS62212273A (en) * 1986-03-10 1987-09-18 三井建設株式会社 Manufacture of foamed concrete
JPH03223144A (en) * 1990-01-29 1991-10-02 Tomiyasu Honda Production of inorganic board
JP2015021877A (en) * 2013-07-22 2015-02-02 矢内 誠 Radioactive material removal device and method for solidifying radioactive contaminated water

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JPH0380403B2 (en) 1991-12-24

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