JPS638278A - Manufacture of cement structure on water - Google Patents
Manufacture of cement structure on waterInfo
- Publication number
- JPS638278A JPS638278A JP14709586A JP14709586A JPS638278A JP S638278 A JPS638278 A JP S638278A JP 14709586 A JP14709586 A JP 14709586A JP 14709586 A JP14709586 A JP 14709586A JP S638278 A JPS638278 A JP S638278A
- Authority
- JP
- Japan
- Prior art keywords
- water
- cement
- cement structure
- ratio
- formwork
- 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
Links
- 239000004568 cement Substances 0.000 title claims description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims description 26
- 238000004519 manufacturing process Methods 0.000 title claims description 5
- 239000000203 mixture Substances 0.000 claims description 11
- 238000009415 formwork Methods 0.000 claims description 8
- 230000005484 gravity Effects 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 4
- 238000005187 foaming Methods 0.000 description 6
- 235000013336 milk Nutrition 0.000 description 5
- 239000008267 milk Substances 0.000 description 5
- 210000004080 milk Anatomy 0.000 description 5
- 238000002156 mixing Methods 0.000 description 4
- 239000004088 foaming agent Substances 0.000 description 3
- 239000004094 surface-active agent Substances 0.000 description 3
- 229920006328 Styrofoam Polymers 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000007667 floating Methods 0.000 description 2
- 238000009472 formulation Methods 0.000 description 2
- 235000018102 proteins Nutrition 0.000 description 2
- 108090000623 proteins and genes Proteins 0.000 description 2
- 102000004169 proteins and genes Human genes 0.000 description 2
- 230000002797 proteolythic effect Effects 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 239000008261 styrofoam Substances 0.000 description 2
- 230000004580 weight loss Effects 0.000 description 2
- 108010010803 Gelatin Proteins 0.000 description 1
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 1
- 235000011613 Pinus brutia Nutrition 0.000 description 1
- 241000018646 Pinus brutia Species 0.000 description 1
- 235000010582 Pisum sativum Nutrition 0.000 description 1
- 240000004713 Pisum sativum Species 0.000 description 1
- 239000011398 Portland cement Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000005018 casein Substances 0.000 description 1
- BECPQYXYKAMYBN-UHFFFAOYSA-N casein, tech. Chemical compound NCCCCC(C(O)=O)N=C(O)C(CC(O)=O)N=C(O)C(CCC(O)=N)N=C(O)C(CC(C)C)N=C(O)C(CCC(O)=O)N=C(O)C(CC(O)=O)N=C(O)C(CCC(O)=O)N=C(O)C(C(C)O)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=O)N=C(O)C(CCC(O)=O)N=C(O)C(COP(O)(O)=O)N=C(O)C(CCC(O)=N)N=C(O)C(N)CC1=CC=CC=C1 BECPQYXYKAMYBN-UHFFFAOYSA-N 0.000 description 1
- 235000021240 caseins Nutrition 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 229920000159 gelatin Polymers 0.000 description 1
- 239000008273 gelatin Substances 0.000 description 1
- 235000019322 gelatine Nutrition 0.000 description 1
- 235000011852 gelatine desserts Nutrition 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000003562 lightweight material Substances 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 239000011120 plywood Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000000344 soap Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
Landscapes
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (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】
［産業上の利用分野］
本発明は水上環でのセメント１１１１造物のＷＡ遣方法
に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for applying cement 1111 structures in a water ring.
［従来の技術・問題点］
水上に設置するセメント構造物としてコンクリートバー
ジ、フェロセメント船等があるが、いずれも予めドライ
状態で構造物とするもので、特に大型のものでは、その
運搬に制約を受ける。[Conventional technology/problems] There are concrete barges, ferrocement ships, etc. as cement structures installed on the water, but both are structures that are prepared in a dry state beforehand, and there are restrictions on transportation, especially for large ones. receive.
水上において、コンクリートを現場打設するには、通常
の軽量コンクリートにおいても強固な型枠を必要とし、
その組み立て、解体作業が困難で、まだ、その実現をみ
るに至っていない、 また、通常、裏込等に用いられて
いる気泡率を６０％程度とした比重０．６程度のエアミ
ルクを直接水上に打設すると、比重が大であるために、
水中分解が起こり、充分なセメント構造物とはなり得な
い。In order to cast concrete on-site on water, even ordinary lightweight concrete requires strong formwork.
It is difficult to assemble and disassemble it, and it has not yet been realized.In addition, air milk with a specific gravity of about 0.6 with a bubble rate of about 60%, which is normally used for backfilling, is poured directly onto the water. When poured, due to its high specific gravity,
Decomposition occurs in water and cannot form a sufficient cement structure.
本発明の目的はセメント構造物を構造体として必要最小
限の強度を確保し且つ容易に水上に浮かぶ程超軽量化し
たセメント構造物を水上での現場打で製造することにあ
る。An object of the present invention is to use a cement structure as a structure to manufacture a cement structure that has the minimum required strength and is so lightweight that it can easily float on water, by casting on site on water.
［問題点を解決するための手段］
従って、本発明は水上に簡易な型枠を設け、この型枠に
容積率で７５％以上の気泡を含有し且つ０．４〜０．１
、好適には０．３５〜０．２５の比重をもつ水硬性組成
物を流し込み、該水硬性組成物を硬化させてセメント構
造物を得ることを特徴とする水上でのセメント構造物の
製造方法にある。[Means for Solving the Problems] Therefore, the present invention provides a simple formwork above the water, and the formwork contains air bubbles of 75% or more in terms of volume ratio, and has air bubbles of 0.4 to 0.1%.
, a method for manufacturing a cement structure on water, characterized by pouring a hydraulic composition having a specific gravity of preferably 0.35 to 0.25, and curing the hydraulic composition to obtain a cement structure. It is in.
し作 用コ
水上（本明細書に記載する術語「水上」は水上及び少な
くとも表面に水層を有する超軟弱地盤等を包含すること
を理解されたい）という制約された施工条件下で、セメ
ント構造物を構築するためには現場打が最適であり、骨
材等を使用しない水硬性組成物等を用いることが有利で
ある。Under the restricted construction conditions of above water (the term "above water" as used in this specification should be understood to include above water and ultra-soft ground having at least a water layer on the surface), the cement structure Casting on site is optimal for building things, and it is advantageous to use hydraulic compositions that do not use aggregates or the like.
本発明に使用する水硬性組成物としてはセメントミルク
に気泡を添加した気泡コンクリートを使用できる。As the hydraulic composition used in the present invention, aerated concrete made by adding air bubbles to cement milk can be used.
気泡コンクリートはその気泡量を多くしてゆくと、その
強度が低下し、気泡率が７５％（容量比）を超えると、
しばしば硬化前に壊れ、見掛比重として０．４以下のも
のを安定して製造することができなかった。As the amount of air bubbles in aerated concrete increases, its strength decreases, and when the air bubble ratio exceeds 75% (volume ratio),
It often broke before curing, and it was not possible to stably produce one with an apparent specific gravity of 0.4 or less.
本発明に使用する水硬性組成物では、起泡剤、添加剤及
び発泡機の遊走、配合条件の限定及び混合精度の向上等
を行なうことによって、該水硬性組成物中に直径１１以
下の微細な気泡を均一に独立気泡として分散させること
ができ、それによって気泡率が７５％（容量比）以上で
且つ見掛比重が０．４〜０．１、好適には０．３５〜０
．２５のセメント構造物を得ることができる。In the hydraulic composition used in the present invention, by controlling the migration of the foaming agent, additives, and foaming machine, limiting the blending conditions, and improving the mixing accuracy, fine particles with a diameter of 11 or less are added to the hydraulic composition. bubbles can be uniformly dispersed as closed cells, thereby achieving a cell ratio of 75% or more (volume ratio) and an apparent specific gravity of 0.4 to 0.1, preferably 0.35 to 0.
．． 25 cement structures can be obtained.
起泡剤にはゼラチンやカゼインのような蛋白質の誘導体
く蛋白質分解系）、松脂のような樹脂石鹸顕、合成樹脂
系の界面活性剤（界面活性剤系）のものがあるが、本発
明に使用する水硬性組成物には界面活性剤系のものより
も蛋白分解質系のものが気泡の細かさ、強さ等で優れて
おり、また、更に少量のＰＶＡ等の添加をすると気泡が
安定し、好ましい性状を与える。Foaming agents include protein derivatives such as gelatin and casein (proteolytic type), resin soaps such as pine resin, and synthetic resin surfactants (surfactant type). Protein-based hydraulic compositions are superior to surfactant-based ones in terms of bubble fineness and strength, and adding a small amount of PVA etc. can stabilize the bubbles. and give desirable properties.
気泡群と混合するセメントミルクは早強性のセメントを
水／セメント比０．６〜０．４の範囲で用いることが好
ましい、この比が上述の範囲外であると、分離を生じ、
高強度が得られないために好ましくない。The cement milk to be mixed with the air bubbles is preferably an early-strengthening cement with a water/cement ratio in the range of 0.6 to 0.4; if this ratio is outside the above range, separation will occur;
This is not preferred because high strength cannot be obtained.
発泡機はガラスピーズを主体とする発泡媒体のものが優
れ、気泡群とセメントスラリーの混合は例えば５００．
ｒｐｍ程度の高性能連続ミキサーが望ましい。A foaming machine with a foaming medium mainly composed of glass peas is preferable, and mixing of air bubbles and cement slurry can be performed using a foaming machine of, for example, 500.
A high performance continuous mixer at around rpm is desirable.
このようにして得られた気泡率７５％以上及び見掛比重
０．４〜０．１、好適には０．３５〜０．２５をもつ気
泡コンクリートは見掛上はとんどが泡であり、水上に直
接投下しても容易に溶解することなく、そのまま硬化し
てセメント構造物（浮体）となる。The aerated concrete obtained in this way with a pore ratio of 75% or more and an apparent specific gravity of 0.4 to 0.1, preferably 0.35 to 0.25 is mostly foam in appearance. Even when dropped directly onto water, it does not easily dissolve and hardens to form a cement structure (floating body).
セメント構造物の側面を造る簡易な型枠には発泡スチロ
ール板、ベニア板等の軽量材を使用することができる。Lightweight materials such as styrofoam boards and plywood boards can be used as simple formwork for constructing the sides of cement structures.
［実 施 例］ 以下に実施例を挙げ、本発明を更に説明する。[Example] The present invention will be further explained with reference to Examples below.
及１１
早強ポルトランドセメントを用い、水／セメント比０．
６のセメントミルクを形成し、このセメントミルク１容
に、蛋白質分解質系起泡剤（商品名：ニスコートＫ）の
３％液にＰＶＡ０．５％を添加した発泡液を１ 、０
ｋｇ／ ａｍ”の圧縮空気でビーズ式発泡機に通して形
成した気泡群をそれぞれ１容、２容及び４容を配合し、
５００ ｒｐｍの連続ミキサーで混合して気泡コンクリ
ートを得た。and 11 Using early-strength Portland cement, water/cement ratio 0.
A foaming solution made by adding 0.5% of PVA to a 3% solution of a proteolytic foaming agent (trade name: Niskort K) was added to 1 volume of this cement milk.
1 volume, 2 volume, and 4 volume of bubbles formed by passing through a bead-type foaming machine with compressed air at 1 kg/am'',
Aerated concrete was obtained by mixing in a continuous mixer at 500 rpm.
２０ｍｍ厚の発泡スチロールで巾５０ｃｍＸ長さ５０ｃ
ｍＸ高さ５０ｃｍの型枠を作成し、水上に直接浮かべ、
この型枠に上述の３種の気泡コンクリートを流し込んだ
。20mm thick styrofoam, width 50cm x length 50cm
Create a formwork of m x height 50cm and float it directly on the water.
The three types of aerated concrete described above were poured into this formwork.
セメントミルク／気泡群比１／４で得られるセメント構
造物（本発明品）を該比１／１及び１／２で得られるセ
メント構造物（比較品）の特性を以下の第１表に記載す
る。The properties of the cement structure obtained with the cement milk/bubble group ratio of 1/4 (product of the present invention) and the cement structure obtained with the ratio of 1/1 and 1/2 (comparative product) are listed in Table 1 below. do.
策−」−」創
注に重量損失率は流し込み時の供試体の重量に対する硬
化後の重量の差であり、いずれの場合にも７日材令での
乾燥重量を測定したものである。The weight loss rate is the difference in the weight of the specimen after curing compared to the weight of the specimen at the time of pouring, and in both cases, the dry weight was measured after 7 days of age.
注２＝圧縮強さは４×４×１６ｃＩ１１供試体７日材令
のものを使用して測定した。Note 2: Compressive strength was measured using 4x4x16cI11 specimens aged 7 days.
第１表から明らかなように、配合１すなわち本発明品の
セメント構造物は水面下の構造物損傷度（重量損失率）
が５％以下と良好であるが、配合２及び３すなわち比較
品のセメント構造物ではそれぞれ１６．８％及び２５．
２％と損傷度が大きく、満足のいくセメント構造物とは
いい難しい。As is clear from Table 1, the cement structure of formulation 1, that is, the product of the present invention, has a structural damage degree (weight loss rate) below the water surface.
However, in formulations 2 and 3, that is, comparative cement structures, the rates were 16.8% and 25%, respectively.
The degree of damage was as high as 2%, making it difficult to create a satisfactory cement structure.
また、本発明品は１年後ら水上部が約３０ｃｍ残存し、
セメント構造物の半分以上が水上に安定に残存するが、
比鮫品では水上部が５〜１５ｃ＋ｎと少なく満足のいく
セメント構造物ではなかった。In addition, the product of the present invention retains approximately 30 cm of water above the water after one year.
More than half of the cement structures remain stable above water;
The Hisame product had a small water upper part of 5 to 15c+n, and was not a satisfactory cement structure.
［発明の効果］
本発明によると水上の現場で容易に大型のセメント構造
物を構築することができ、例えば人工島、浮桟橋等を製
造する際に使用することができる。[Effects of the Invention] According to the present invention, a large cement structure can be easily constructed on the water, and can be used, for example, when manufacturing an artificial island, a floating pier, etc.
特許出願人 小野田セメント株式会社 小野田ケミコ株式会社Patent applicant: Onoda Cement Co., Ltd. Onoda Chemico Co., Ltd.
Claims (1)
上の気泡を含有し且つ０．４〜０．１の比重をもつ水硬
性組成物を流し込み、該水硬性組成物を硬化させてセメ
ント構造物を得ることを特徴とする水上でのセメント構
造物の製造方法。A simple formwork is provided above the water, a hydraulic composition containing 75% or more of air bubbles by volume and a specific gravity of 0.4 to 0.1 is poured into the formwork, and the hydraulic composition is cured. A method for manufacturing a cement structure on water, the method comprising: obtaining a cement structure by
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61147095A JPH0825819B2 (en) | 1986-06-25 | 1986-06-25 | Method for manufacturing cement structure on water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61147095A JPH0825819B2 (en) | 1986-06-25 | 1986-06-25 | Method for manufacturing cement structure on water |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS638278A true JPS638278A (en) | 1988-01-14 |
| JPH0825819B2 JPH0825819B2 (en) | 1996-03-13 |
Family
ID=15422367
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61147095A Expired - Fee Related JPH0825819B2 (en) | 1986-06-25 | 1986-06-25 | Method for manufacturing cement structure on water |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0825819B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0744386A1 (en) * | 1995-05-16 | 1996-11-27 | Maxflow Environmental Corp. | Air-entraining agent and method of producing same |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5091112A (en) * | 1973-12-17 | 1975-07-21 | ||
| JPS5369434A (en) * | 1976-12-03 | 1978-06-20 | Kurokawa Kishiyou Kenchiku Tos | Method of building floating construction on water and sea |
-
1986
- 1986-06-25 JP JP61147095A patent/JPH0825819B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5091112A (en) * | 1973-12-17 | 1975-07-21 | ||
| JPS5369434A (en) * | 1976-12-03 | 1978-06-20 | Kurokawa Kishiyou Kenchiku Tos | Method of building floating construction on water and sea |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0744386A1 (en) * | 1995-05-16 | 1996-11-27 | Maxflow Environmental Corp. | Air-entraining agent and method of producing same |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0825819B2 (en) | 1996-03-13 |
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|---|---|---|---|
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Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
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