JPH0825819B2 - Method for manufacturing cement structure on water - Google Patents
Method for manufacturing cement structure on waterInfo
- Publication number
- JPH0825819B2 JPH0825819B2 JP61147095A JP14709586A JPH0825819B2 JP H0825819 B2 JPH0825819 B2 JP H0825819B2 JP 61147095 A JP61147095 A JP 61147095A JP 14709586 A JP14709586 A JP 14709586A JP H0825819 B2 JPH0825819 B2 JP H0825819B2
- Authority
- JP
- Japan
- Prior art keywords
- water
- cement
- cement structure
- bubbles
- hydraulic composition
- 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 - Fee Related
Links
- 239000004568 cement Substances 0.000 title claims description 31
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims description 26
- 238000004519 manufacturing process Methods 0.000 title claims description 6
- 238000000034 method Methods 0.000 title 1
- 239000000203 mixture Substances 0.000 claims description 11
- 230000005484 gravity Effects 0.000 claims description 7
- 238000009415 formwork Methods 0.000 claims description 6
- 239000004567 concrete Substances 0.000 description 7
- 235000013336 milk Nutrition 0.000 description 6
- 239000008267 milk Substances 0.000 description 6
- 210000004080 milk Anatomy 0.000 description 6
- 238000005187 foaming Methods 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 3
- 239000004088 foaming agent Substances 0.000 description 3
- 230000002797 proteolythic effect Effects 0.000 description 3
- 239000004094 surface-active agent Substances 0.000 description 3
- 229920006328 Styrofoam Polymers 0.000 description 2
- 239000011324 bead Substances 0.000 description 2
- 238000007667 floating Methods 0.000 description 2
- 238000009472 formulation Methods 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
- 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
- 239000011398 Portland cement Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 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
- 238000005266 casting Methods 0.000 description 1
- 238000013329 compounding Methods 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
- 239000006260 foam Substances 0.000 description 1
- 239000011381 foam concrete 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
- 238000011065 in-situ storage Methods 0.000 description 1
- 239000003562 lightweight material Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 235000018102 proteins Nutrition 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 102000004169 proteins and genes Human genes 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
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 230000004580 weight loss Effects 0.000 description 1
Landscapes
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は水上等でのセメント構造物の製造方法に関す
る。TECHNICAL FIELD The present invention relates to a method for producing a cement structure on water or the like.
［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] Cement structures installed on water include concrete barges and ferro-cement ships, but all of them are structures that are dried in advance. 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 the water on-site, a strong formwork is required even for ordinary lightweight concrete, and it is difficult to assemble and dismantle it, and it has not been realized yet. In addition, when air milk with a specific gravity of about 0.6, which has a bubble ratio of about 60% and is used for backfilling, is placed directly on the water, the specific gravity is large, so that water decomposition occurs and a sufficient cement structure is obtained. It cannot be a thing.
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。It is an object of the present invention to manufacture a cement structure which has a cement structure as a structure and which has a necessary minimum strength and is ultralight so that it can be easily floated on the water by in-situ casting on the water.
［問題点を解決するための手段］ 従って、本発明は、水上に高さ方向に簡易な型枠を設
け、この型枠内の水面に容積率で75％以上の気泡を含有
し且つ0.4〜1.0の比重をもつ水硬性組成物を直接流し込
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 Problems] Accordingly, the present invention provides a simple mold on the water in the height direction, and the water surface in the mold contains 75% or more by volume of bubbles and 0.4 to A method for producing a cement structure on water, which comprises directly pouring a hydraulic composition having a specific gravity of 1.0 and curing the hydraulic composition to obtain a cement structure.
［作 用］ 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。[Operation] Under a limited construction condition of above water (it should be understood that the term "water above" described in the present specification includes super soft ground having water layer on the surface and at least the surface thereof), a cement structure. On-site hitting is the best way to build things,
It is advantageous to use a hydraulic composition or the like that does not use aggregate 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 obtained by adding 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。The strength of aerated concrete decreases as the amount of bubbles increases, and when the percentage of bubbles exceeds 75% (volume ratio),
Often, it broke before curing, and it was not possible to stably produce 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
及び発泡機の選定、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1mm
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 selecting a foaming agent, an additive and a foaming machine, limiting the compounding conditions and improving the mixing accuracy, etc., the hydraulic composition has a diameter of 1 mm.
It is possible to uniformly disperse the following fine bubbles as closed cells, thereby producing a cement structure having a bubble ratio of 75% (volume ratio) or more and an apparent specific gravity of 0.4 to 0.1, preferably 0.35 to 0.25. Obtainable.
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（蛋白質分解系）、松脂のような樹脂石鹸類、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 system), resin soaps such as pine resin, and synthetic resin-based surfactants (surfactant-based). Among the hydraulic compositions used, proteolytic type is superior to surfactant type in fineness and strength of bubbles, and bubbles are stable when a small amount of PVA etc. is added. And give preferable 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。As the cement milk to be mixed with the bubbles, it is preferable to use fast-setting cement in a water / cement ratio of 0.6 to 0.4. If this ratio is out of the above range, separation occurs and high strength cannot be obtained, which is not preferable.
発泡機はガラスビ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500rpm
程度の高性能連続ミキサーが望ましい。The foaming machine is preferably a foaming medium mainly composed of glass beads, and mixing of the cell group and cement slurry is, for example, 500 rpm.
A high performance continuous mixer of the order of magnitude 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
は見掛上ほとんどが泡であり、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 bubble ratio of 75% or more and the apparent specific gravity obtained in this way
Aerated concrete with 0.4 to 0.1, preferably 0.35 to 0.25 is apparently mostly foam, and it does not easily dissolve even when dropped directly on water, it hardens as it is to become 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。Light-weight materials such as styrofoam boards and veneer boards can be used for a simple formwork for building the side surface of the cement structure.
［実 施 例］ 以下に実施例を挙げ、本発明を更に説明する。[Examples] The present invention is further described below with reference to Examples.
実施例 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：エスコートＫ）の
３％液にPVA0.5％を添加した発泡液を1.0kg/cm2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、500rpmの連続ミキサー
で混合して気泡コンクリートを得た。Example Using early strength Portland cement, water / cement ratio of 0.
6 cement milk was formed, and 1 volume of this cement milk was added with 1.0 kg / cm 2 of foaming liquid prepared by adding 0.5% of PVA to 3% of proteolytic foaming agent (trade name: Escort K). 1 volume, 2 volumes and 4 volumes of the cell groups formed by passing through a bead type foaming machine with compressed air were mixed and mixed with a continuous mixer of 500 rpm to obtain cell concrete.
20mm厚の発泡スチロールで巾50cm×長さ50cm×高さ50
cm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 x height 50
A cm formwork was created, floated directly on the water, and the above three types of cellular concrete 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 characteristics of the cement structure (invention product) obtained with a cement milk / air bubble group ratio of 1/4 (comparative product) are shown in Table 1 below. To do.
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 good degree of structural damage (weight loss rate) of 5% or less under the water surface, but the formulations 2 and 3, that is, the comparative product. 16.8% and 25.2% for cement structures, respectively
And the degree of damage is great, and it is difficult to say that it is a satisfactory cement structure.
また、本発明品は１年後も水上部が約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
較品では水上部が５〜15cm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 remains about 30 cm above the water even after one year, and more than half of the cement structure remains stable on the water, but the comparative product has a small water top of 5 to 15 cm, which is a satisfactory cement structure. Was not.
［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 site on the water, and can be used, for example, in manufacturing an artificial island, a floating jetty, or the like.
Claims (1)
型枠内の水面に容積率で75％以上の気泡を含有し且つ0.
4〜1.0の比重をもつ水硬性組成物を直接流し込み、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。1. A simple formwork is provided on the water in the height direction, and the surface of the water in the formwork contains 75% or more of bubbles by volume and has a volume ratio of 0.
A method for producing a cement structure on water, which comprises directly pouring a hydraulic composition having a specific gravity of 4 to 1.0 and curing the hydraulic composition to obtain a cement structure.
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 JPS638278A (en) | 1988-01-14 |
| JPH0825819B2 true 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) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5654352A (en) * | 1995-05-16 | 1997-08-05 | Maxflow Environmental Corp. | Air-entraining agent and method of producing same |
Family Cites Families (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
Also Published As
| Publication number | Publication date |
|---|---|
| JPS638278A (en) | 1988-01-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3834918A (en) | Raw batch for forming porous architectural structures and method of preparing same | |
| CN111499239A (en) | Composite structural material and aggregate therefor | |
| JPH07247183A (en) | Construction and structural material, its production, molding, constructing or structural member and its production | |
| JP2000514032A (en) | Sound absorbing cementitious composition and its manufacturing method | |
| US20090075073A1 (en) | Light weight concrete product containing synthetic fibers | |
| JP2000508617A (en) | Concrete mixture resulting in concrete having high strength at various densities, method for producing the mixture and concrete, and use of anionic additives | |
| JP2004083339A (en) | Powdery foaming agent for cellular mortar | |
| JPH0825819B2 (en) | Method for manufacturing cement structure on water | |
| CN110451861A (en) | A kind of light foam concrete preparation method | |
| CN109095867B (en) | Pourable water-resistant gypsum pouring material and preparation method thereof | |
| JP2009083413A (en) | Method for producing cellular concrete | |
| JPH07291760A (en) | Lightweight concrete for filling and its light weight cured product | |
| US3023116A (en) | Method for forming concrete structures which set in place while floating | |
| JPS5812223B2 (en) | Manufacturing method of lightweight concrete | |
| JP2551584B2 (en) | Molding method for lightweight inorganic substrate | |
| JP3028120B2 (en) | Quick-setting material for casting floating structures | |
| JPH08169781A (en) | High flow super lightweight aggregate concrete | |
| JPH0797283A (en) | Lightweight concrete | |
| JPS6319464B2 (en) | ||
| RU2497768C2 (en) | Method of producing products from light-weight concretes and products from light-weight concretes, produced by thereof | |
| CN1023474C (en) | Process for producing foam concrete | |
| JP2847145B2 (en) | Water casting structure and construction method thereof | |
| JPH0214889A (en) | Production of closed cell-type foamed cement board | |
| JPS5844629B2 (en) | Manufacturing method of lightweight cellular concrete | |
| JP2847146B2 (en) | Water casting structure and construction method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| LAPS | Cancellation because of no payment of annual fees |