JPH0264079A - Curing of concrete - Google Patents
Curing of concreteInfo
- Publication number
- JPH0264079A JPH0264079A JP21358788A JP21358788A JPH0264079A JP H0264079 A JPH0264079 A JP H0264079A JP 21358788 A JP21358788 A JP 21358788A JP 21358788 A JP21358788 A JP 21358788A JP H0264079 A JPH0264079 A JP H0264079A
- Authority
- JP
- Japan
- Prior art keywords
- water
- concrete
- top face
- agent
- cement
- 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 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000002270 dispersing agent Substances 0.000 claims abstract description 12
- 239000004568 cement Substances 0.000 claims abstract description 9
- 239000007864 aqueous solution Substances 0.000 claims abstract description 6
- 239000003513 alkali Substances 0.000 claims abstract description 5
- 239000000463 material Substances 0.000 claims abstract description 4
- 239000000839 emulsion Substances 0.000 claims abstract description 3
- 238000001723 curing Methods 0.000 claims description 8
- 238000009415 formwork Methods 0.000 claims description 4
- 239000000243 solution Substances 0.000 claims description 2
- 238000005507 spraying Methods 0.000 claims description 2
- 239000004033 plastic Substances 0.000 abstract description 6
- 229920003023 plastic Polymers 0.000 abstract description 6
- 239000003795 chemical substances by application Substances 0.000 abstract description 5
- 239000002245 particle Substances 0.000 abstract description 2
- 230000000740 bleeding effect Effects 0.000 abstract 2
- 238000005336 cracking Methods 0.000 abstract 1
- 238000004898 kneading Methods 0.000 abstract 1
- 238000007789 sealing Methods 0.000 abstract 1
- 229910021487 silica fume Inorganic materials 0.000 abstract 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 5
- 239000002344 surface layer Substances 0.000 description 5
- 206010016807 Fluid retention Diseases 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 2
- 229920001577 copolymer Polymers 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011372 high-strength concrete Substances 0.000 description 2
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- RGHNJXZEOKUKBD-SQOUGZDYSA-M D-gluconate Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C([O-])=O RGHNJXZEOKUKBD-SQOUGZDYSA-M 0.000 description 1
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- LDHQCZJRKDOVOX-NSCUHMNNSA-N crotonic acid Chemical compound C\C=C\C(O)=O LDHQCZJRKDOVOX-NSCUHMNNSA-N 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 239000004815 dispersion polymer Substances 0.000 description 1
- -1 ethylene, propylene Chemical group 0.000 description 1
- 229940050410 gluconate Drugs 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 description 1
- 239000011976 maleic acid Substances 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000011178 precast concrete Substances 0.000 description 1
- 239000011513 prestressed concrete Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 229920001059 synthetic polymer Polymers 0.000 description 1
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 1
- LDHQCZJRKDOVOX-UHFFFAOYSA-N trans-crotonic acid Natural products CC=CC(O)=O LDHQCZJRKDOVOX-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Aftertreatments Of Artificial And Natural Stones (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明はコンクリートの養生方法、特に高強度コンクリ
ートを打設したときの、ブリージング水の影響を排除で
きるようにしたコンクリートの養生方法に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a concrete curing method, and particularly to a concrete curing method that can eliminate the influence of breathing water when high-strength concrete is cast.
（従来の技術）
高強度コンクリートは高強度抗をはじめ、プレストレス
トコンクリートポール、プレキャストコンクリート版な
どに用いられ、最近では高層ＲＣ造建物の現場打ちにも
使用されている。(Prior Art) High-strength concrete is used for high-strength columns, prestressed concrete poles, precast concrete slabs, etc., and recently, it is also used for on-site casting of high-rise RC buildings.
そして、これらは一般に低水セメントであって硬練りで
あるところから、そのワーカビリチーを高めるために流
動化剤を添加混練している。Since these are generally low water cements and are hard kneaded, a fluidizing agent is added and kneaded to increase their workability.
（発明が解決しようとする課題）
しかし、普通コンクリートでも同じであるが、特に叙述
したような高流動化剤を使用した低水セメント比のコン
クリートは、型枠内に打設後、養生している間にその天
端面にプラスチックひび割れ（初期収縮ひび割れ、沈み
ひび割れ）が発生し易く、その解消が望まれていた。(Problem to be solved by the invention) However, although the same is true for ordinary concrete, concrete with a low water-to-cement ratio using a high fluidizing agent as described above requires curing after pouring into the formwork. During this time, plastic cracks (initial shrinkage cracks, sinking cracks) tend to occur on the top surface, and there has been a desire to eliminate this problem.
すなわち、高流動化コンクリートは混純水量が極めて少
なく、打設養成中の天端面が高温や乾燥などの影響によ
ってひび割れし易いのである。In other words, highly fluidized concrete has an extremely small amount of mixed pure water, and the top surface during pouring and curing tends to crack due to the effects of high temperature and dryness.
本発明は上記事情に鑑みてなされたものであって、その
目的はコンクリート打設後の表層に発生し易いプラスチ
ックひび割れを有効に防止することのできるコンクリー
トの養生方法を提供するこにある。The present invention has been made in view of the above circumstances, and its object is to provide a concrete curing method that can effectively prevent plastic cracks that are likely to occur in the surface layer after concrete is placed.
（課題を解決するための手段）
本発明は上記目的を達成するために、型枠内にコンクリ
ートを打設した後、天端の開放面にセメントアルカリの
水溶液に可溶で、水には不溶である有機高分子材料のフ
ルカリ水溶液または乳濁液から成る分散剤を散布して養
生するのである。(Means for Solving the Problems) In order to achieve the above-mentioned object, the present invention provides, after pouring concrete in a formwork, a cement that is soluble in an aqueous alkali solution and insoluble in water. The material is cured by spraying a dispersant consisting of a fluoric aqueous solution or emulsion of an organic polymeric material.
（作 用）
空気中に開放された天端部、すなわち打設コンクリート
の表層上において、分散剤の作用によってセメント粒子
が分散され、水との接触面櫃が増すとともに表面を閉塞
して保水性をよくする。(Function) Cement particles are dispersed by the action of the dispersant at the top end open to the air, that is, on the surface layer of the poured concrete, increasing the contact surface with water and blocking the surface to improve water retention. make things better.
（実 施 例）
以下、本発明の好適な実施例について図面を参照にして
詳細に説明する。(Embodiments) Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.
第１図に本発明の方法による施工手順を同図（ａ）から
（Ｃ）の順序に従って示す。Fig. 1 shows the construction procedure according to the method of the present invention according to the order of Fig. 1 (a) to (C).
先ず同図（ａ）の如く型枠内に高流動化コンクリート１
を打設する。打設した高流動化コンクリート１の天端面
２には、打設直後から暫くするとブリージング水３が溜
まる（第１図（ｂ））。First, as shown in the same figure (a), highly fluidized concrete 1 is placed in the formwork.
to be poured. Immediately after pouring, breathing water 3 accumulates on the top surface 2 of the highly fluidized concrete 1 placed (FIG. 1(b)).
シリカフニーム及び高流動化剤を使用した低水セメント
比の高流動化コンクリート１は、混練水量が極めて少な
いので、天端面２にプラスチックひび割れが生じ易い。Highly fluidized concrete 1 with a low water-to-cement ratio using silica hneem and a high fluidizing agent has a very small amount of mixing water, so plastic cracks are likely to occur on the top surface 2.
それ故に、天端面２の保水性を確保する目的でブリージ
ング水３になじむように、天端面２に分散剤４を散布す
る。Therefore, for the purpose of ensuring the water retention property of the top surface 2, the dispersant 4 is sprinkled on the top surface 2 so as to be compatible with the breathing water 3.
この分散剤４は水に不溶で、アルカリに可溶な有機合成
高分子ポリマーディスバージョンあるいは水溶液として
はメチルメタクツレート、酢酸ビニル、塩化ビニル、エ
チレン、プロピレン、スチレン等の不飽和基を含有する
有機化合物がある。This dispersant 4 is an organic synthetic polymer dispersion that is insoluble in water and soluble in alkali, or as an aqueous solution contains unsaturated groups such as methyl methacturate, vinyl acetate, vinyl chloride, ethylene, propylene, and styrene. There are organic compounds.
またアルカリに可溶なアクリル酸、クロメン酸。Acrylic acid and chromenic acid are also soluble in alkali.
マレイン酸に代表される不飽和基を含有する有機酸との
共重合体又はそれに相当する重合体であって、ペーパー
（ｐｈ）１０〜１３の範囲内でアルカリ水溶液に可溶と
なるカルボキシル基の含有量を調整した固形分２７％の
酢酸ビニル−クロトン酸（９７： ３）の共重合体であ
るアンモニア水溶液がある。A copolymer with an organic acid containing an unsaturated group, such as maleic acid, or a corresponding polymer containing a carboxyl group that is soluble in an aqueous alkaline solution with a pH of 10 to 13. There is an ammonia aqueous solution that is a copolymer of vinyl acetate and crotonic acid (97:3) with an adjusted solid content of 27%.
すると、第１図（ｃ）の如く、分散剤４が混合されたブ
リージング水３は打設したコンクリート１の表層中に分
散浸透され、また速かに表層を硬化してコンクリート天
端面２の保水性は著しく向上される。Then, as shown in FIG. 1(c), the breathing water 3 mixed with the dispersant 4 is dispersed and permeated into the surface layer of the poured concrete 1, and quickly hardens the surface layer to improve the water retention of the concrete top surface 2. performance is significantly improved.
なお、必要に応じてグルコン酸ソーグーなどの凝結遅緩
剤（リターダ−）を分散剤４に混合することにより、コ
ンクリートの天端表層の硬化を任意に遅延させ、コール
ドジヨイント発生の防止に効かずこともできる。If necessary, by mixing a setting retardant (retarder) such as gluconate sogo into the dispersant 4, the hardening of the top surface layer of the concrete can be arbitrarily delayed and the occurrence of cold joints can be effectively prevented. Zuko can too.
（効 果）
以上詳しく述べたように、本発明の養生方法はコンクリ
ートを打設したときの天端面に分散剤を散布するので、
天端面に保水性を有する層が形成され、コンクリート中
の水分が蒸発しにくく、プラスチックひび割れの防止に
有効な効果を奏する。(Effects) As described in detail above, the curing method of the present invention sprays a dispersant on the top surface of concrete when it is poured.
A water-retaining layer is formed on the top surface, making it difficult for water in the concrete to evaporate, which is effective in preventing plastic cracks.
第１図（ａ）乃至（ｃ）は何れも本発明の詳細な説明す
るため、その手順に従って打設コンクリ−１・の断面を
示した縦断面図である。
３・・・・・・ブリージング水
４・・・・・・分散剤1(a) to 1(c) are longitudinal cross-sectional views showing a cross section of a poured concrete 1 according to the procedure for explaining the present invention in detail. 3...Breathing water 4...Dispersant
Claims (1)
面にセメントアルカリの水溶液に可溶で、水には不溶で
ある有機高分子材料のアルカリ水溶液または乳濁液から
成る分散剤を散布して養生することを特徴とするコンク
リート養生方法。(1) After concrete is poured into the formwork, a dispersant consisting of an alkaline aqueous solution or emulsion of an organic polymeric material that is soluble in an aqueous cement alkali solution and insoluble in water is applied to the open surface of the top of the form. A concrete curing method characterized by curing by spraying.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21358788A JPH0264079A (en) | 1988-08-30 | 1988-08-30 | Curing of concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21358788A JPH0264079A (en) | 1988-08-30 | 1988-08-30 | Curing of concrete |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0264079A true JPH0264079A (en) | 1990-03-05 |
Family
ID=16641671
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21358788A Pending JPH0264079A (en) | 1988-08-30 | 1988-08-30 | Curing of concrete |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0264079A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006327867A (en) * | 2005-05-26 | 2006-12-07 | Denki Kagaku Kogyo Kk | Method of treating high fluidity mortar or high fluidity concrete and cement hardened body |
-
1988
- 1988-08-30 JP JP21358788A patent/JPH0264079A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006327867A (en) * | 2005-05-26 | 2006-12-07 | Denki Kagaku Kogyo Kk | Method of treating high fluidity mortar or high fluidity concrete and cement hardened body |
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