JPH02281200A - Radiation shielding concrete - Google Patents
Radiation shielding concreteInfo
- Publication number
- JPH02281200A JPH02281200A JP10170989A JP10170989A JPH02281200A JP H02281200 A JPH02281200 A JP H02281200A JP 10170989 A JP10170989 A JP 10170989A JP 10170989 A JP10170989 A JP 10170989A JP H02281200 A JPH02281200 A JP H02281200A
- Authority
- JP
- Japan
- Prior art keywords
- concrete
- effect
- serpentine
- radiation shielding
- shielding
- 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.)
- Pending
Links
- 239000004567 concrete Substances 0.000 title claims abstract description 34
- 230000005855 radiation Effects 0.000 title claims abstract description 24
- WYTGDNHDOZPMIW-RCBQFDQVSA-N alstonine Natural products C1=CC2=C3C=CC=CC3=NC2=C2N1C[C@H]1[C@H](C)OC=C(C(=O)OC)[C@H]1C2 WYTGDNHDOZPMIW-RCBQFDQVSA-N 0.000 claims abstract description 11
- 239000002893 slag Substances 0.000 claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000004568 cement Substances 0.000 claims abstract description 4
- 230000000694 effects Effects 0.000 abstract description 21
- 229910052739 hydrogen Inorganic materials 0.000 abstract description 4
- 239000001257 hydrogen Substances 0.000 abstract description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 abstract description 3
- 239000003795 chemical substances by application Substances 0.000 abstract description 3
- 230000005251 gamma ray Effects 0.000 abstract description 3
- 230000005484 gravity Effects 0.000 description 5
- 239000000203 mixture Substances 0.000 description 4
- 238000009472 formulation Methods 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 239000004604 Blowing Agent Substances 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000005587 bubbling Effects 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 239000011440 grout Substances 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Landscapes
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、放射線（γ線及び中性子）の遮蔽を必要とす
る建物・構築物等に用いられる放射線遮蔽コンクリート
に係るものである。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to radiation shielding concrete used in buildings, structures, etc. that require shielding from radiation (γ rays and neutrons).
（従来の技術）
従来の放射線遮蔽コンクリートの殆んどは主にγ線の遮
蔽を目的としたもので、γ線の遮蔽のためにコンクリー
トの比重を大きくすることのみが問題とされていた。(Prior Art) Most of the conventional radiation shielding concretes were mainly intended for shielding gamma rays, and the only problem was increasing the specific gravity of concrete for shielding gamma rays.
（発明が解決しようとする課題）
このように従来の放射線遮蔽コンクリートは主にγ線の
遮蔽を目的としており、γ線のみならず中性子に対して
も高い遮蔽効果を有する放射線遮蔽コンクリートの出現
が要望されている。しかも従来の放射線遮蔽コンクリー
トではスランプ値がほとんど０σで、流動性を得ること
ができなかった。(Problem to be solved by the invention) As described above, conventional radiation shielding concrete is mainly intended for shielding gamma rays, and the emergence of radiation shielding concrete that has a high shielding effect not only for gamma rays but also for neutrons. It is requested. Moreover, with conventional radiation shielding concrete, the slump value was almost 0σ, making it impossible to obtain fluidity.
本発明は前記従来技術の有する問題点に鑑みて提案され
たもので、その目的とする処は、γ線のみならず中性子
に対しても高い遮蔽効果を有し、しかもコンクリートの
ワーカビリティが改善された放射線遮蔽コンクリートを
提供する点にある。The present invention was proposed in view of the problems of the prior art, and its purpose is to have a high shielding effect not only against gamma rays but also against neutrons, and to improve the workability of concrete. The aim is to provide radiation-shielding concrete.
（課題を解決するための手段）
前記の目的を達成するため１本発明に係る放射線遮蔽コ
ンクリートは、水、セメント、蛇紋岩及び風砕スラグよ
りなる細骨材、蛇紋岩よシなる粗骨材、並に混和材より
構成されている。(Means for Solving the Problems) In order to achieve the above object, the radiation shielding concrete according to the present invention comprises water, cement, fine aggregate made of serpentine and air-crushed slag, and coarse aggregate made of serpentine. , and an admixture.
（作用）
本発明に係る放射線遮蔽コンクリートは前記したように
、粗骨材及び細骨材として岩石中に比較的多くの結晶水
を含有する蛇紋岩を用いたことにより、前記放射線遮蔽
コンクリート中の水素含有率が高くなシ、中性子の遮蔽
効果が向上する。しかも、細骨材として前記蛇紋岩に加
え、比重の大きな風砕スラブを用いることにより、前記
放射線遮蔽コンクリートの比重が高くなシγ線の遮蔽効
果が向上する。(Function) As described above, the radiation shielding concrete according to the present invention uses serpentinite, which contains a relatively large amount of water of crystallization in the rock, as the coarse aggregate and fine aggregate. If the hydrogen content is high, the neutron shielding effect will be improved. Furthermore, by using a wind-crushed slab with a high specific gravity in addition to the serpentinite as the fine aggregate, the radiation shielding effect of the radiation shielding concrete with a high specific gravity is improved.
また、本発明に係る放射線遮蔽コンクリートには、減水
効果及び流動化効果を有する混和材が使用されたことと
、細骨材として使用された球状の風砕スラグのベアリン
グ効果とによりコンクリートの流動性が向上することに
よって、前記放射線遮蔽コンクリートのワーカビリティ
が改善されるものである。In addition, the radiation shielding concrete according to the present invention uses an admixture that has a water-reducing effect and a fluidizing effect, and the bearing effect of the spherical air-crushed slag used as a fine aggregate improves the fluidity of the concrete. As a result, the workability of the radiation shielding concrete is improved.
（実施例） 以下本発明を実施例について説明する。(Example) The present invention will be described below with reference to Examples.
下記第１表は放射線遮蔽コンクリートの調合例を示す。Table 1 below shows an example of the formulation of radiation shielding concrete.
註（２） 風砕スラグの主成分は下記のとおりである。Note (2) The main components of air crushed slag are as follows.
Ｆｅ２Ｏ３２２〜３５％
ＣａＯ３６〜４３％
註（３）
混和材（デンカタスコン ＴＹＰＥ −Ｍ ）微細なカ
ルシウムサルフォアルミネートを主体とする組成物に、
０．１〜２．０チの・有機糊剤、０．００５〜０．５チ
の発泡剤、１．０〜６．０チの分散剤及び０．５〜１０
．０％の急結材を含有せしめたグラウト用セメント混和
材
前記放射線遮蔽コンクリートにおいては、細骨材及び粗
骨材として、岩石中に比較的多くの結晶水を含有する蛇
紋岩を用いたことによって、前記コンクリート中の水素
含有率が高くなり、中性子の遮蔽効果が向上する。Fe2O322-35% CaO36-43% Note (3) Admixture (Denka Tascon TYPE-M) In a composition mainly composed of fine calcium sulfoaluminate,
0.1-2.0 inches of organic thickening agent, 0.005-0.5 inches of blowing agent, 1.0-6.0 inches of dispersing agent, and 0.5-10 inches
．． Cement admixture for grout containing 0% rapid setting agent In the radiation shielding concrete described above, serpentinite, which contains a relatively large amount of crystallized water in the rock, is used as the fine aggregate and coarse aggregate. , the hydrogen content in the concrete increases, and the neutron shielding effect improves.
また細骨材として比重の大きな風砕スラグを用いること
によって、前記コンクリートの比重が犬となシγ線の遮
蔽効果が向上する。Furthermore, by using air-crushed slag with a high specific gravity as the fine aggregate, the specific gravity of the concrete will be lower and the gamma ray shielding effect will be improved.
更に減水効果、及び流動化効果を有する前記混和剤及び
混和材を使用したことと、球状の風砕ス下記第２表は前
掲第１表の調合例に示された使用材料の一例を示すもの
である。Furthermore, the above-mentioned admixtures and admixtures having water-reducing and fluidizing effects were used, and the following Table 2 shows an example of the materials used as shown in the formulation examples in Table 1 above. It is.
第２表 註（１） 蛇紋岩の組成は下記のとおりである。Table 2 Note (1) The composition of serpentinite is as follows.
５ｉＯ２４０，６１（チ）
Ｔｔ０２０．０３
Ａｌ２Ｏ２２，３０
Ｆｅ２０３ ３．６７
ＦｅＯ３，２３
Ｍｎ０ ０．０８
ＭｐＯ３７，５２
ＣａＯ０，１５
Ｎａ２０ ０．０２
に２０ 痕跡
Ｎ２０（＋） １１．６１
Ｎ２０（−１０，１０
ｐｏ 痕跡
Ｏｒ２０３ １．０７
Ｎ１０ ０．１５
ラグのベアリング効果とによって前記コンクリドの流動
性が向上し、ワーカビリティが改善される。5iO240,61 (chi) Tt020.03 Al2O22,30 Fe203 3.67 FeO3,23 Mn0 0.08 MpO37,52 CaO0,15 Na20 0.02 to 20 Trace N20(+) 11.61 N20(-10,10 po Traces Or203 1.07 N10 0.15 The bearing effect of the lugs improves the fluidity of the concrete and improves workability.
この際、前記蛇紋岩骨材を水洗いすることによって、蛇
紋岩の表面に多量に付着している微粉成分を除去し、骨
材の吸水性を低減して前記コンクリートの流動性を向上
し、ワーカビリティを改善するものである。At this time, by washing the serpentine aggregate with water, a large amount of fine powder components adhering to the surface of the serpentine is removed, reducing the water absorption of the aggregate and improving the fluidity of the concrete. This improves performance.
このように流動性が向上された前記放射線遮蔽コンクリ
ートのスランプ値は、１０〜１７ｃＷＬ程度に向上され
たことが認められた。It was observed that the slump value of the radiation shielding concrete whose fluidity was improved in this way was improved to about 10 to 17 cWL.
（発明の効果）
本発明によれば、放射線遮蔽コンクリートの骨材として
蛇紋岩及び風砕スラグを用いることにより、γ線の遮蔽
に加え中性子の遮蔽効果が向上し、その結果例えば高速
増殖炉の原子炉容器まわシの生体遮蔽壁等、中性子の遮
蔽を必要とする建物・構築物の必要遮蔽厚さを削減でき
る。しかも中性子の遮蔽に有効な水素を前記蛇紋岩中の
結晶水という比較的安定した状態で保有していることか
ら５００℃〜６００℃の高温状態においても中性子の遮
蔽効果を持続することができる。(Effects of the Invention) According to the present invention, by using serpentine and air-crushed slag as aggregates for radiation shielding concrete, the effect of shielding neutrons in addition to gamma rays is improved, and as a result, for example, in fast breeder reactors. It is possible to reduce the required shielding thickness of buildings and structures that require neutron shielding, such as biological shielding walls around nuclear reactor vessels. Furthermore, since the serpentinite contains hydrogen, which is effective in shielding neutrons, in a relatively stable state of crystalline water, the neutron shielding effect can be maintained even at high temperatures of 500°C to 600°C.
また本発明に係る放射線遮蔽コンクリートは混和材を使
用したことと、細骨材として使用した球状の風砕スラグ
のばアリング効果とによって流動性が向−ヒし、その結
果ポンプ圧送等、通常のコンクリートと同様の施行方法
が可能となるとともに、打設時のコンクリートのまわシ
込みがよくなり、パイプレーク等による締固めが十分行
えることからコンクリート中のすき間の発生が防止でき
、より一層放射線の遮蔽性能が向上し、且つ前記放射線
遮蔽コンクリートの構造体としての強度も向上する。In addition, the radiation shielding concrete according to the present invention has improved fluidity due to the use of admixtures and the bubbling effect of the spherical air-crushed slag used as fine aggregate, and as a result, it is difficult to use conventional methods such as pumping. It is possible to use the same method of construction as with concrete, and the concrete can be rolled in better during pouring, and compaction using pipe raking etc. can be performed sufficiently, which prevents the formation of gaps in the concrete and further reduces radiation. The shielding performance is improved, and the strength of the radiation shielding concrete as a structure is also improved.
Claims (1)
蛇紋岩よりなる粗骨材、並に混和材より構成されたこと
を特徴とする放射線遮蔽コンクリート。Fine aggregate consisting of water, cement, serpentine and air-crushed slag,
Radiation shielding concrete characterized by being composed of coarse aggregate made of serpentine and admixtures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10170989A JPH02281200A (en) | 1989-04-24 | 1989-04-24 | Radiation shielding concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10170989A JPH02281200A (en) | 1989-04-24 | 1989-04-24 | Radiation shielding concrete |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02281200A true JPH02281200A (en) | 1990-11-16 |
Family
ID=14307837
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10170989A Pending JPH02281200A (en) | 1989-04-24 | 1989-04-24 | Radiation shielding concrete |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02281200A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05172992A (en) * | 1991-07-01 | 1993-07-13 | Hitachi Zosen Corp | Containment vessel of radioactive substances |
| JP2014185906A (en) * | 2013-03-22 | 2014-10-02 | Fuji Kagaku Kk | Criticality prevention coating material, criticality prevention coating layer and method for forming the same |
-
1989
- 1989-04-24 JP JP10170989A patent/JPH02281200A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05172992A (en) * | 1991-07-01 | 1993-07-13 | Hitachi Zosen Corp | Containment vessel of radioactive substances |
| JP2014185906A (en) * | 2013-03-22 | 2014-10-02 | Fuji Kagaku Kk | Criticality prevention coating material, criticality prevention coating layer and method for forming the same |
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