JPH0333668B2 - - Google Patents
Info
- Publication number
- JPH0333668B2 JPH0333668B2 JP18587486A JP18587486A JPH0333668B2 JP H0333668 B2 JPH0333668 B2 JP H0333668B2 JP 18587486 A JP18587486 A JP 18587486A JP 18587486 A JP18587486 A JP 18587486A JP H0333668 B2 JPH0333668 B2 JP H0333668B2
- Authority
- JP
- Japan
- Prior art keywords
- cement
- concrete
- concrete structure
- fibers
- 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
- 239000000835 fiber Substances 0.000 claims description 28
- 239000004568 cement Substances 0.000 claims description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 239000011396 hydraulic cement Substances 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 claims description 8
- 239000002657 fibrous material Substances 0.000 claims description 5
- 239000002994 raw material Substances 0.000 claims description 5
- 238000009987 spinning Methods 0.000 claims description 4
- QORWJWZARLRLPR-UHFFFAOYSA-H tricalcium bis(phosphate) Chemical group [Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O QORWJWZARLRLPR-UHFFFAOYSA-H 0.000 claims description 4
- ANBBXQWFNXMHLD-UHFFFAOYSA-N aluminum;sodium;oxygen(2-) Chemical compound [O-2].[O-2].[Na+].[Al+3] ANBBXQWFNXMHLD-UHFFFAOYSA-N 0.000 claims description 2
- 238000000034 method Methods 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims description 2
- 229910001388 sodium aluminate Inorganic materials 0.000 claims description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 6
- 229920000049 Carbon (fiber) Polymers 0.000 description 5
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 5
- 239000004917 carbon fiber Substances 0.000 description 5
- 238000009413 insulation Methods 0.000 description 5
- 239000012779 reinforcing material Substances 0.000 description 5
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 4
- 239000007864 aqueous solution Substances 0.000 description 4
- 239000010425 asbestos Substances 0.000 description 4
- 229910052895 riebeckite Inorganic materials 0.000 description 4
- 239000011398 Portland cement Substances 0.000 description 3
- 239000004088 foaming agent Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000004575 stone Substances 0.000 description 3
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- 239000001506 calcium phosphate Substances 0.000 description 2
- 229910000389 calcium phosphate Inorganic materials 0.000 description 2
- 235000011010 calcium phosphates Nutrition 0.000 description 2
- 239000012784 inorganic fiber Substances 0.000 description 2
- 239000000395 magnesium oxide Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 235000019738 Limestone Nutrition 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- -1 and steam curing it Substances 0.000 description 1
- 229910052586 apatite Inorganic materials 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000009970 fire resistant effect Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000009415 formwork Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- FAHBNUUHRFUEAI-UHFFFAOYSA-M hydroxidooxidoaluminium Chemical compound O[Al]=O FAHBNUUHRFUEAI-UHFFFAOYSA-M 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- VSIIXMUUUJUKCM-UHFFFAOYSA-D pentacalcium;fluoride;triphosphate Chemical compound [F-].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O VSIIXMUUUJUKCM-UHFFFAOYSA-D 0.000 description 1
- 239000010451 perlite Substances 0.000 description 1
- 235000019362 perlite Nutrition 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000011301 petroleum pitch Substances 0.000 description 1
- 229920002239 polyacrylonitrile Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 239000012209 synthetic fiber Substances 0.000 description 1
- 239000010455 vermiculite Substances 0.000 description 1
- 235000019354 vermiculite Nutrition 0.000 description 1
- 229910052902 vermiculite Inorganic materials 0.000 description 1
Landscapes
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Inorganic Fibers (AREA)
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、強度、耐熱性、耐ひび割れ性、耐衝
撃性等の改善されたコンクリート構造及びその製
造方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a concrete structure with improved strength, heat resistance, cracking resistance, impact resistance, etc., and a method for producing the same.
（従来の技術）
従来、コンクリートの強度を改善するために、
それに鋼繊維、ガラス繊維、合成繊維、炭素繊
維、セラミツクフアイバー、石綿等、引張強度の
強い繊維を混入させている。(Conventional technology) Conventionally, in order to improve the strength of concrete,
Fibers with strong tensile strength such as steel fibers, glass fibers, synthetic fibers, carbon fibers, ceramic fibers, and asbestos are mixed into them.
このうち、強度、耐熱性、断熱性、耐衝撃性が
大きい繊維材料として、シリカアルミナフアイバ
ー、炭素繊維、石綿等がある。 Among these, silica-alumina fibers, carbon fibers, asbestos, and the like are examples of fiber materials having high strength, heat resistance, heat insulation properties, and impact resistance.
シリカアルミナフアイバーは、同量のシリカと
アルミナ及び少量の硼素、ジルコニア等から製造
される繊維で、1200〜1300℃の範囲の高温に耐
え、かさ高が大きく、熱伝導率が小さく、繊維径
も３〜4μで断熱性も良好なことから、各種断熱、
耐火用コンクリート補強材として用いられてい
る。 Silica-alumina fiber is a fiber manufactured from equal amounts of silica and alumina and small amounts of boron, zirconia, etc. It can withstand high temperatures in the range of 1200 to 1300℃, has large bulk, low thermal conductivity, and has a small fiber diameter. Since it has good insulation properties with a thickness of 3 to 4μ, it can be used for various types of insulation,
Used as a reinforcing material for fireproof concrete.
また、炭素繊維はポリアクリロニトリル繊維、
石油系あるいは石油系ピツチを高温焼成して得ら
れるもので、引張強度５×103〜２×106Kg／cm2程
度と極めて高い補強材となり、耐熱、耐火、強度
の高いコンクリート補強材として用いられてい
る。 In addition, carbon fiber is polyacrylonitrile fiber,
It is obtained by firing petroleum-based or petroleum-based pitch at high temperatures, and is a reinforcing material with an extremely high tensile strength of about 5 x 10 3 to 2 x 10 6 Kg/cm 2 , and is used as a heat-resistant, fire-resistant, and strong concrete reinforcing material. It is used.
さらに、石綿は古くから知られた天然無機繊維
であり、耐衝撃性、断熱性、耐火性、吸音性等を
有する非構造用コンクリートの製造に用いられて
いる。 Furthermore, asbestos is a natural inorganic fiber that has been known for a long time and is used in the production of non-structural concrete that has impact resistance, heat insulation, fire resistance, sound absorption, etc.
（発明が解決しようとする問題点）
しかしながら、繊維質補強材としてシリカアル
ミナフアイバー、炭素繊維等を用いることは、そ
れら繊維の製造過程において、材料の溶融、炭素
化等の高温処理工程を必要とし、よつてコスト高
となり、その経済性において一定の限界があるこ
とは避けられないという問題がある。また石綿に
ついては、公害問題があり使用が困難である。し
たがつて本発明の目的は、強度、耐熱性等に優
れ、かつ経済性をよいコンクリート構造及びその
製造方法を提供することである。(Problem to be solved by the invention) However, using silica-alumina fibers, carbon fibers, etc. as fibrous reinforcing materials requires high-temperature treatment steps such as melting and carbonization of the materials in the manufacturing process of these fibers. Therefore, there is a problem in that the cost is high and there is a certain limit to the economic efficiency. Furthermore, asbestos is difficult to use due to pollution problems. SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a concrete structure that has excellent strength, heat resistance, etc. and is economically efficient, and a method for manufacturing the same.
（問題点を解決するための手段）
本発明者らは、種々の無機質繊維について研究
の結果、強度、耐熱性、断熱性、破壊靱性耐に優
れ、コンクリートとの付着強度が大きい水硬性セ
メントの水和硬化物と無機質ゲル硬化物よりなる
長繊維状セメントフアイバーを製造することに成
功した。本発明は、この新規に製造された長繊維
状セメントフアイバーをコンクリートに配合する
ものであり、水硬性セメントと無機質ゲル生成材
と水とを含む紡糸原料をゲル化浴中に押出して形
成されたゲル化繊維状物を養生することにより得
られたセメントフアイバーがコンクリート中に配
合されてなることを特徴とするコンクリート構
造、及び水硬性セメントと無機質ゲル生成材と水
とを含む紡糸原料をゲル化浴中に押出して形成さ
れたゲル化繊維状物を養生することにより得られ
たセメントフアイバーを、セメント及び骨材と混
合した後、水を35〜55重量％加えて混練し、これ
を打設した後、養生することを特徴とするコンク
リート構造の製造法である。(Means for Solving the Problems) As a result of research on various inorganic fibers, the present inventors have found that hydraulic cement has excellent strength, heat resistance, heat insulation, and fracture toughness, and has high adhesion strength to concrete. We succeeded in producing long cement fibers consisting of a hydrated hardened product and an inorganic gel hardened product. The present invention is to mix this newly manufactured long-fiber cement fiber into concrete, which is formed by extruding a spinning raw material containing hydraulic cement, an inorganic gel-forming material, and water into a gelling bath. A concrete structure characterized in that cement fibers obtained by curing a gelled fibrous material are mixed into concrete, and a gelled spinning raw material containing hydraulic cement, an inorganic gel-forming material, and water. Cement fiber obtained by curing the gelled fibrous material extruded into a bath is mixed with cement and aggregate, then kneaded with 35 to 55% water added, and then cast. This is a manufacturing method for concrete structures that is characterized by curing after curing.
まず、本発明に係る長繊維状セメントフアイバ
ーについて説明する。 First, the long cement fiber according to the present invention will be explained.
該セメントフアイバーは、水硬性セメントの水
和硬化物と無機質ゲル硬化物かならるものであ
り、その製造は次のようにして行なわれる。すな
わち水硬性セメント／水の配合比が35〜55％重量
％になるように両者を混練し、これに更にアルミ
ン酸ソーダ水溶液（20〜60重量％水溶液）等ゲル
生成材を外割りで５〜20重量％添加して、充分に
撹拌混合し、得られたスラリーを押出機のダイス
細孔より連続的にアンモニア水溶液（５〜10重量
％水溶液）等の入つたゲル化浴中に押出してゲル
化し、次いで得られた押出品を常温で、空気もし
くは水中養生することにより製造される。 The cement fiber is made of a hydrated and hardened product of hydraulic cement and a hardened inorganic gel product, and is manufactured as follows. That is, both are kneaded so that the mixing ratio of hydraulic cement/water is 35 to 55% by weight, and to this, a gel forming material such as a sodium aluminate aqueous solution (20 to 60% by weight aqueous solution) is added to the outside by 5 to 5%. Add 20% by weight, stir and mix thoroughly, and extrude the resulting slurry continuously through the die pores of an extruder into a gelling bath containing an ammonia aqueous solution (5 to 10% by weight aqueous solution) to form a gel. It is manufactured by curing the resulting extrudate in air or water at room temperature.
なお、このゲルは養生することによつて硬化
し、水硬性セメント成分と共にセメントフアイバ
ーを形成する。 Note that this gel hardens by curing and forms cement fibers together with hydraulic cement components.
本発明におけるコンクリート原料のセメントと
しては、ポルトランドセメント、アルミナセメン
ト、リン酸カルシウム塩セメントなどの水硬性セ
メントのほか、石灰、苦土石灰、石膏マグネシア
などの気硬性セメントを用いることもできる。 As cement as a raw material for concrete in the present invention, in addition to hydraulic cements such as portland cement, alumina cement, and calcium phosphate salt cement, air-hardening cements such as lime, magnesia, and gypsum magnesia can also be used.
また、骨材として、砕石、砕砂、人工軽量骨
材、高炉スラグ骨材等の人工骨材、砂、砂利等の
天然骨材が用いられる。 Further, as the aggregate, artificial aggregates such as crushed stone, crushed sand, artificial lightweight aggregates, and blast furnace slag aggregates, and natural aggregates such as sand and gravel are used.
その他、常用の混和剤であるAE剤、減水剤、
硬化促進剤、遅延剤、気泡剤、膨張性混和剤、着
色剤等を必要量配合できる。 In addition, commonly used admixtures such as AE agents, water reducing agents,
A curing accelerator, a retarder, a foaming agent, a swelling admixture, a coloring agent, etc. can be added in necessary amounts.
本発明においては、繊維状セメントフアイバー
とコンクリート構造材とは成分組成がセメントか
らなるものであつて類似しているものであるため
に、両者間の付着力は非常に強く、その結果、該
コンクリートの引張強度、破断強度を増大するこ
ととなる。こうしたことは、炭素繊維等コンクリ
ートに対する付着力の弱い繊維補強材を使用した
場合と大きく異なり、繊維セメントフアイバーの
配合使用がコンクリート構造を有利に強化できる
利点でもある。 In the present invention, since the fibrous cement fiber and the concrete structural material are made of cement and have similar compositions, the adhesion between them is very strong, and as a result, the concrete This increases the tensile strength and breaking strength of This is greatly different from the case of using fiber reinforcing materials such as carbon fibers, which have a weak adhesion to concrete, and the use of fiber cement fibers in combination has the advantage of advantageously strengthening the concrete structure.
セメントとして、特にアパタイト前駆体であ
り、融点が1600℃以上にも達するリン酸カルシウ
ムを用いると、超高温断熱型のコンクリートを製
造することができる。 If calcium phosphate, which is an apatite precursor and has a melting point of 1,600°C or higher, is used as cement, it is possible to produce ultra-high-temperature insulating concrete.
また、火山れき、火山岩粗砕物、膨張けつ岩、
ひる石、パーライト、水砕スラグ等の軽量骨材を
用いると、軽量で強度の高い軽量コンクリート構
造材を低コストで提供できる有利性がある。 In addition, volcanic rubble, crushed volcanic rock, expanded ash rock,
The use of lightweight aggregates such as vermiculite, perlite, and granulated slag has the advantage of being able to provide lightweight, high-strength lightweight concrete structural materials at low cost.
さらに、ポルトランドセメントに、石灰石、ケ
イ石、高炉スラズ等を混練して、これに発泡剤
（Al等）を添加混合して蒸気養生することによつ
て、プレハブ工法に使用される組み立て用PC板
を製造してもよい。このようにして製造されるコ
ンクリートの圧縮強度は500〜1000Kg／cm2であり、
実用に耐える強度を有するコンクリートとなるも
のである。 Furthermore, by kneading Portland cement with limestone, silica stone, blast furnace slurry, etc., adding a foaming agent (Al, etc.) to the mixture, and steam curing it, PC boards for assembly used in prefabricated construction methods are manufactured. may be manufactured. The compressive strength of the concrete produced in this way is 500 to 1000 Kg/ cm2 ,
The concrete is strong enough to withstand practical use.
（実施例）
本発明コンクリートの製造法を以下実施例に従
つて説明する。(Example) The method for producing concrete of the present invention will be explained below according to Examples.
本例では、ポルトランドセメントに骨材とし
て、砕石を65〜80重量％を加え、さらに水を加え
て混練し、これに対して、水硬性セメント成分と
してリン酸カルシウムを、また無機質ゲル生成材
としてアルミン酸ナトリウムを用いて、前述の製
法により取得した引張5000〜10000Kg／cm2の長繊
維状セメントフアイバーを10重量％混合して、均
一分散し、さらに気泡剤（Al）を0.03重量％添加
した後、これに水を40〜60重量％加えて混練し
て、充分に撹拌混合する。次いで、これを型枠に
打ち込み、空中もしくは水中養生することにより
コンクリート構造が得られる。 In this example, 65 to 80% by weight of crushed stone is added as an aggregate to Portland cement, water is added and kneaded, and calcium phosphate is added as a hydraulic cement component and aluminic acid is added as an inorganic gel forming material. Using sodium, 10% by weight of long fibrous cement fibers with a tensile strength of 5,000 to 10,000 Kg/cm 2 obtained by the above-mentioned manufacturing method were mixed and uniformly dispersed, and after further adding 0.03% by weight of a foaming agent (Al), 40 to 60% by weight of water is added to this, kneaded, and thoroughly stirred and mixed. Next, a concrete structure is obtained by pouring this into a formwork and curing it in air or water.
本例では、引張強度100〜300Kg／cm2となり、コ
ンクリート内部の欠陥を減じ、緻密にし、ひび割
れの原因となる応力集中を少なくして、コンクリ
ートの引張強度を増大させるものである。 In this example, the tensile strength is 100 to 300 Kg/cm 2 , which increases the tensile strength of concrete by reducing defects inside the concrete, making it denser, and reducing stress concentration that causes cracks.
なお、上記セメントフアイバーは単にコンクリ
ート構造内に均一分散するだけでなく、網状、縄
状の形態としたものをコンクリート構造内に所定
方向に配置したり、織布したものをコンクリート
を介して積層した構造とすることもできる。 Note that the above cement fibers are not only dispersed uniformly within the concrete structure, but also arranged in the form of nets or ropes in a predetermined direction within the concrete structure, or laminated with woven fibers interposed in the concrete. It can also be a structure.
（発明の効果）
以上の説明から明らかなように、本発明によつ
て提供される、繊維状セメントフアイバーを配合
したコンクリート構造は、力学的強度に優れ、経
済性の面でも有利なものである。(Effects of the Invention) As is clear from the above explanation, the concrete structure containing fibrous cement fibers provided by the present invention has excellent mechanical strength and is advantageous in terms of economy. .
したがつて、コンクリリート構造を良質なもの
とすることができ、かつコストも低下できる。 Therefore, the concrete structure can be made of high quality and the cost can be reduced.
Claims (1)
含む紡糸原料をゲル化浴中に押出して形成された
ゲル化繊維状物を養生することにより得られたフ
アイバーが、コンクリート中に配合されてなるこ
とを特徴とするコンクリート構造。 ２ 水硬性セメントがリン酸カルシウム塩である
特許請求の範囲第１項記載のコンクリート構造。 ３ 無機質ゲル生成材がアルミン酸ナトリウムで
ある特許請求の範囲第１項又は第２項に記載のコ
ンクリート構造。 ４ 水硬性セメントと無機質ゲル生成材と水とを
含む紡糸原料をゲル化浴中に押出して形成された
ゲル化繊維状物を養生することにより得られたフ
アイバーを、セメント及び骨材と混合した後、水
を35〜55重量％加えて混練し、これを打設した
後、養生することを特徴とするコンクリート構造
の製造法。 ５ 骨材の混入率が65〜80重量％である特許請求
の範囲第４項に記載のコンクリート構造の製造
法。[Claims] 1. A fiber obtained by extruding a spinning raw material containing hydraulic cement, an inorganic gel-forming material, and water into a gelling bath and curing a gelled fibrous material is Concrete structure characterized by being mixed inside. 2. The concrete structure according to claim 1, wherein the hydraulic cement is a calcium phosphate salt. 3. The concrete structure according to claim 1 or 2, wherein the inorganic gel-forming material is sodium aluminate. 4 A fiber obtained by extruding a spinning raw material containing hydraulic cement, an inorganic gel-forming material, and water into a gelling bath and curing a gelled fibrous material was mixed with cement and aggregate. After that, 35 to 55% by weight of water is added and kneaded, and this is poured and then cured. 5. The method for manufacturing a concrete structure according to claim 4, wherein the mixing rate of aggregate is 65 to 80% by weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18587486A JPS6340749A (en) | 1986-08-07 | 1986-08-07 | Concrete structure and its manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18587486A JPS6340749A (en) | 1986-08-07 | 1986-08-07 | Concrete structure and its manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6340749A JPS6340749A (en) | 1988-02-22 |
| JPH0333668B2 true JPH0333668B2 (en) | 1991-05-17 |
Family
ID=16178389
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18587486A Granted JPS6340749A (en) | 1986-08-07 | 1986-08-07 | Concrete structure and its manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6340749A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3460552B2 (en) | 1997-11-28 | 2003-10-27 | 松下電器産業株式会社 | Air conditioner temperature sensor fixing device |
-
1986
- 1986-08-07 JP JP18587486A patent/JPS6340749A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6340749A (en) | 1988-02-22 |
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