JPH07944B2 - Curing material for concrete construction - Google Patents
Curing material for concrete constructionInfo
- Publication number
- JPH07944B2 JPH07944B2 JP9323089A JP9323089A JPH07944B2 JP H07944 B2 JPH07944 B2 JP H07944B2 JP 9323089 A JP9323089 A JP 9323089A JP 9323089 A JP9323089 A JP 9323089A JP H07944 B2 JPH07944 B2 JP H07944B2
- Authority
- JP
- Japan
- Prior art keywords
- concrete
- curing material
- curing
- alkali
- weight
- 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 - Lifetime
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/04—Preventing evaporation of the mixing water
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
- 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〕 本発明はコンクリート構造物のコンクリート等の打設お
よび脱型後に養生被膜を形成することのできる養生材に
関する。TECHNICAL FIELD The present invention relates to a curing material capable of forming a curing film after placing concrete on a concrete structure and removing the mold from the mold.
一般に、型枠を用いてコンクリート等を打設した後、コ
ンクリートを完全に養生させる前に脱型処理を行うと、
コンクリートから急速に水分が逃げてしまい、水和反応
不十分による強度不足や乾燥収縮によるひび割れ等が発
生することが知られてる。In general, after pouring concrete etc. using a formwork and performing demolding treatment before completely curing the concrete,
It is known that water rapidly escapes from concrete, resulting in insufficient strength due to insufficient hydration reaction and cracking due to drying shrinkage.
そこで上記のような欠点を解決するために、例えばコン
クリートの養生が完全になされるまで、型枠を外さない
方法、型枠を取り外した後に散水等を施す湿潤養生法、
シート等の遮へい材料を被せる遮へい養生法、コンクリ
ート表面に養生膜を形成させる方法等が提案されてい
る。Therefore, in order to solve the above-mentioned drawbacks, for example, until the concrete is completely cured, a method of not removing the formwork, a wet curing method of performing watering after removing the formwork,
Shielding curing methods for covering with a shielding material such as a sheet, and methods for forming a curing film on the surface of concrete have been proposed.
しかし、これらの方法では、不十分に養生効果と養生材
被膜の性能が得られないのが実情である。However, in these methods, the curing effect and the performance of the curing material coating are not sufficiently obtained under the present circumstances.
本発明の目的は上記のような従来のコンクリートの養生
材の不利な点を排除したコンクリート施工に於ける養生
材を提供することであって、本発明によれば、ひび割れ
の解消、更に外部からの侵食性物質を遮断し、エッチン
グ効果による付着強度を有する膜を備えた養生材被膜が
提供される。An object of the present invention is to provide a curing material in concrete construction in which the disadvantages of the conventional curing material for concrete described above are eliminated, and according to the present invention, elimination of cracks and further external There is provided a curing material coating film having a film which blocks the corrosive substances of (3) and has an adhesive strength due to an etching effect.
本発明の他の目的はコンクリートまたはモルタル構造物
の耐久性を増大し、しかも外装仕上材または外装下地材
等に利用可能な養生材被膜を提供することにある。Another object of the present invention is to provide a curing material coating which increases the durability of concrete or mortar structure and can be used as an exterior finishing material or an exterior base material.
本発明の上記目的は、酸性のアルカリ硬化型合成樹脂エ
マルジョンからなり、コンクリート施工における打設お
よび脱型後にコンクリート表面に養生材被膜を形成させ
ることを特徴とする養生材によって達成される。The above object of the present invention is achieved by a curing material comprising an acidic alkali-curable synthetic resin emulsion, which is characterized in that a curing material coating is formed on the concrete surface after casting and demolding in concrete construction.
本発明による酸性のカチオン性アルカリ硬化型合成樹脂
エマルジョンよりなる養生材はアルカリ硬化型アクリル
樹脂エマルジョン、アルカリ硬化型アクリル樹脂エマル
ジョンとエポキシ樹脂エマルジョンの混合物、アクリル
−エチレン−酢ビ共重合エマルジョンからなる。また酸
性のアルカリ硬化型合成樹脂エマルジョンの養生材はシ
リコンアクリル樹脂等からなる。The curing material comprising an acidic cationic alkali-curable synthetic resin emulsion according to the present invention comprises an alkali-curable acrylic resin emulsion, a mixture of an alkali-curable acrylic resin emulsion and an epoxy resin emulsion, and an acrylic-ethylene-vinyl acetate copolymer emulsion. The curing material for the acidic alkali-curable synthetic resin emulsion is made of silicon acrylic resin or the like.
本発明に使用する酸性のカチオン性アルカリ硬化型アク
リル樹脂エマルジョンは、アクリル樹脂を主成分とし、
セメントとの混和性に優れ、且つ酸性であれば特に限定
されないが、好ましくは樹脂固型分が20〜60重量％、粘
度（30℃）200〜1000cps、pH2〜４の水性エマルジョン
であることが望ましい。The acidic cationic alkali-curable acrylic resin emulsion used in the present invention has an acrylic resin as a main component,
It is not particularly limited as long as it has excellent miscibility with cement and is acidic, but it is preferably an aqueous emulsion having a resin solid content of 20 to 60% by weight, a viscosity (30 ° C) of 200 to 1000 cps, and a pH of 2 to 4. desirable.
この際樹脂固型分が20重量％未満では、コンクリート等
に対する所望の接着性が得られず、60重量％を超える場
合は、粘度が高くなり作業性に問題が生じるので好まし
くない。At this time, if the resin solid content is less than 20% by weight, the desired adhesiveness to concrete or the like cannot be obtained, and if it exceeds 60% by weight, the viscosity becomes high and a problem occurs in workability, which is not preferable.
また、pHが前記範囲外である場合には、コンクリート等
との接着性が弱い。一般にカチオン性ポリマーは電気的
な吸着のみにより接着性を得ているが、本発明に使用す
るカチオン性アルカリ硬化型アクリル樹脂エマルジョン
は電気的な接着性に加え、更にアクリル樹脂粒子表面の
アルカリ硬化反応基がセメントのアルカリ成分と架橋反
応を起こし、化学的にも強固に接着するものであり、し
かも耐候性、耐紫外線性、耐オゾン性、耐アルカリ性、
耐水性等を付与することが出来る成分である。Further, if the pH is out of the above range, the adhesion to concrete or the like is weak. In general, a cationic polymer obtains adhesiveness only by electrical adsorption, but the cationic alkali-curable acrylic resin emulsion used in the present invention has electrical adhesiveness, and further has an alkaline curing reaction on the acrylic resin particle surface. The base undergoes a cross-linking reaction with the alkali component of cement, and it adheres strongly chemically as well, and also has weather resistance, UV resistance, ozone resistance, alkali resistance,
It is a component that can impart water resistance and the like.
またカチオン性アルカリ硬化型アクリル樹脂エマルジョ
ンと混合するエポキシ樹脂エマルジョンは、公知のエポ
キシ樹脂を用いることが出来るが、好ましくはエポキシ
当量185〜1200、特に好ましくは300〜34、樹脂固型分が
50〜66重量％、粘度（30℃）200〜3500cpsのエマルジョ
ンであることが望ましい。The epoxy resin emulsion mixed with the cationic alkali-curable acrylic resin emulsion may be a known epoxy resin, but preferably has an epoxy equivalent of 185 to 1200, particularly preferably 300 to 34, and a resin solid component.
An emulsion having a viscosity of 50 to 66% by weight and a viscosity (30 ° C.) of 200 to 3500 cps is desirable.
この際、樹脂固型分が50重量％未満では優れた耐久性が
得られず、66重量％を超えると粘度が高くなり、作業性
に問題が生じるので好ましくない。また、エポキシ樹脂
エマルジョンの硬化剤は特に限定されないが、エポキシ
当量200〜300、特に好ましくは280〜300、樹脂固型分44
〜50重量％、粘度（30℃）30〜200cpsのエポキシ樹脂硬
化剤が望ましい。At this time, if the resin solid content is less than 50% by weight, excellent durability cannot be obtained, and if it exceeds 66% by weight, the viscosity becomes high, which causes a problem in workability, which is not preferable. The curing agent for the epoxy resin emulsion is not particularly limited, but the epoxy equivalent is 200 to 300, particularly preferably 280 to 300, and the resin solid component 44.
It is desirable to use an epoxy resin curing agent of -50% by weight and a viscosity (30 ° C) of 30-200 cps.
前記養生材被膜を構成する主材の配合割合は固形分換算
でカチオン性アルカリ硬化型アクリル樹脂アマルジョン
100重量部に対して、エポキシ樹脂エマルジョン4.0〜90
重量部、特に好ましくは4.0〜40重量部であるのが望ま
しい。The mixing ratio of the main material constituting the curing material coating is a cationic alkali-curable acrylic resin Amulsion in terms of solid content.
Epoxy resin emulsion 4.0 to 90 per 100 parts by weight
It is desirable that the amount is parts by weight, particularly preferably 4.0 to 40 parts by weight.
アクリル−エチレン酢酸ビニル共重合樹脂エマルジョン
は、アクリル樹脂を主成分とし、セメントとの混和性に
優れ、且つ酸性であれば、特に限定されないが、樹脂固
型分20〜50重量％、粘度（30℃）200〜4000cps、pH3〜
５の水性エマルジョンであることが望ましい。Acrylic-ethylene vinyl acetate copolymer resin emulsion, acrylic resin as a main component, excellent compatibility with cement, and if it is acidic, is not particularly limited, but the resin solid content 20 to 50 wt%, viscosity (30 ℃) 200 ~ 4000cps, pH 3 ~
5 is preferred.
この際樹脂固型分が20重量％未満では、コンクリート等
に対する所望の接着性が得られず、50重量％を超える場
合は、粘度が高くなり、作業性に問題点が生じるので好
ましくない。At this time, if the resin solid content is less than 20% by weight, desired adhesiveness to concrete or the like cannot be obtained, and if it exceeds 50% by weight, the viscosity becomes high and a problem occurs in workability, which is not preferable.
またpHが前記範囲外である場合には、コンクリートとの
接着性が弱い。一般にカチオン性ポリマーは電気的な吸
着のみにより接着性を得ているが、本発明に使用するカ
チオン性アクリル−エチレン−酢酸ビニル共重合樹脂エ
マルジョンは電気的な吸着性に加え、更に、アクリル樹
脂粒子表面のアルカリ硬化反応基がセメントのアルカリ
成分と架橋反応を起こし、化学的にも強固に接着するも
のであり、しかも耐候性、耐紫外線性、耐アルカリ性、
耐水性等を付与することが出来る成分である。If the pH is outside the above range, the adhesion to concrete is weak. Generally, a cationic polymer obtains adhesiveness only by electric adsorption, but the cationic acrylic-ethylene-vinyl acetate copolymer resin emulsion used in the present invention has electric adsorbability and further acrylic resin particles. The alkali-curing reactive group on the surface causes a cross-linking reaction with the alkali component of the cement and chemically and firmly adheres, and also has weather resistance, ultraviolet resistance, alkali resistance,
It is a component that can impart water resistance and the like.
酸性シリコンアクリル樹脂エマルジョンは、例えばビニ
ルシリコンとアクリルとの共重合体を主成分とするエマ
ルジョンであって、凝集力が強く、コンクリート等との
付着性及び耐候性に優れたエマルジョンである。具体的
には例えば固型分40〜55重量％、特に好ましくは43〜45
重量％、粘度（25℃）10〜600cps、特に好ましくは5.0
〜6.0のシリコンアクリル樹脂エマルジョンが好まし
い。The acidic silicone acrylic resin emulsion is an emulsion containing, for example, a copolymer of vinyl silicone and acrylic as a main component, has strong cohesive force, and is excellent in adhesion to concrete and the like and weather resistance. Specifically, for example, solid content 40 to 55% by weight, particularly preferably 43 to 45
% By weight, viscosity (25 ° C) 10 to 600 cps, particularly preferably 5.0
A silicone acrylic resin emulsion of ˜6.0 is preferred.
この際樹脂固型分が40重量％未満では、コンクリート等
に対する所望の接着性が得られず、55重量％を超える場
合は、粘度が高くなり、作業性に問題が生じるので好ま
しくない。At this time, if the resin solid content is less than 40% by weight, the desired adhesiveness to concrete or the like cannot be obtained, and if it exceeds 55% by weight, the viscosity becomes high and a problem occurs in workability, which is not preferable.
またpHが前記範囲外である場合にはコンクリートとの接
着性が劣る。その特性としては耐熱性に優れ、エラスト
マー的な性質を高温に至るまで保ち、加熱しても流動化
せずに分解し、更にガス、水蒸気の透過性、耐候性及び
付着性に優れた養生材被膜を形成することが出来る。If the pH is out of the above range, the adhesion to concrete will be poor. A curing material that has excellent heat resistance, maintains elastomeric properties up to high temperatures, decomposes without fluidization even when heated, and has excellent gas and water vapor permeability, weather resistance and adhesion. A coating can be formed.
養生材の塗布量は特に0.1〜0.3kg/m2であるのが望まし
い。The coating amount of the curing material is preferably 0.1 to 0.3 kg / m 2 .
以下の実施例および比較例によって本発明を更に具体的
に説明する。The present invention will be described more specifically with reference to the following examples and comparative examples.
実施例１〜４および比較例１〜３ 第１表に示した組成の養生材を調整し、コンクリート表
面に0.1kg/m2の塗布量で養生材の被膜を形成し、塗膜の
評価を行った。なお、比較例１は被膜のないコンクリー
ト面である。Examples 1 to 4 and Comparative Examples 1 to 3 A curing material having the composition shown in Table 1 was prepared, a coating film of the curing material was formed on the concrete surface at a coating amount of 0.1 kg / m 2 , and the coating film was evaluated. went. Comparative Example 1 is a concrete surface without a coating.
塗布評価の方法は次の通りである。The coating evaluation method is as follows.
1.養生材被膜の状態試験： 養生材被膜は24時間乾燥させ、養生材被膜の状態を目視
で観察した。1. Curing material coating state test: The curing material coating was dried for 24 hours, and the state of the curing material coating was visually observed.
2.透水性試験： JIS A 6909透水性試験方法（24時間後）により測定。2. Water permeability test: Measured by JIS A 6909 water permeability test method (after 24 hours).
3.付着強度試験： JIS A 6910複層仕上塗材の付着強度試験による。3. Adhesive strength test: Based on the adhesive strength test of JIS A 6910 multi-layer finish coating material.
4.養生材の付着性試験： JIS A 5400一般塗料試験方法によりコンクリート養生材
との付着性を調べた。4. Adhesion test of curing material: The adhesion with concrete curing material was examined by JIS A 5400 general paint test method.
〔発明の効果〕 コンクリート構造物のコンクリート等の打設および脱型
後にコンクリート表面に設けられた本発明による養生材
の被膜は、付着性、耐透水性、耐候性に優れた酸性のカ
チオン性アルカリ硬化型アクリルエルマジョン、カチオ
ン性アルカリ硬化型アクリルエルマジョンとエポキシ樹
脂エルマジョンとの混合物、カチオン性アクリル−エチ
レン−酢酸ビニル共重合樹脂エルマジョン、酸性のアル
カリ硬化型シリコンアクリル樹脂等からなる主材を用い
ているので、コンクリート等の養生によるひび割れ、強
度、劣化を防止し、更に外部からの侵食性物質のコンク
リート内への侵入を遮断することができる。また、本発
明の養生材は、養生後、コンクリート等の構造物の耐久
性を増大させる外装仕上材または外装下地材として利用
することもできる。 [Effects of the Invention] The coating film of the curing material according to the present invention provided on the concrete surface after casting and demolding of concrete of concrete structure is an acidic cationic alkali excellent in adhesion, water permeability, and weather resistance. A main material composed of a curable acrylic ermajon, a mixture of a cationic alkali-curable acrylic ermajon and an epoxy resin ermajon, a cationic acrylic-ethylene-vinyl acetate copolymer resin ermajon, an acidic alkali-curable silicone acrylic resin, etc. Therefore, it is possible to prevent cracking, strength, and deterioration due to curing of concrete or the like, and to block invasion of erosive substances from the outside into the concrete. Further, the curing material of the present invention can also be used as an exterior finishing material or an exterior base material that increases the durability of a structure such as concrete after curing.
Claims (1)
ンからなり、コンクリート施工における打設および脱型
後にコンクリート表面に養生材被膜を形成させることを
特徴とする養生材。1. A curing material comprising an acidic alkali-curable synthetic resin emulsion, which forms a curing material coating on the concrete surface after placing and demolding in concrete construction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9323089A JPH07944B2 (en) | 1989-04-14 | 1989-04-14 | Curing material for concrete construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9323089A JPH07944B2 (en) | 1989-04-14 | 1989-04-14 | Curing material for concrete construction |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02272166A JPH02272166A (en) | 1990-11-06 |
| JPH07944B2 true JPH07944B2 (en) | 1995-01-11 |
Family
ID=14076743
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9323089A Expired - Lifetime JPH07944B2 (en) | 1989-04-14 | 1989-04-14 | Curing material for concrete construction |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07944B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100365126B1 (en) * | 2000-03-16 | 2002-12-18 | 주식회사 엘지화학 | Single Component Type Crack Patching Agent Using Modified Acryl Prepolymer Emulsion |
| JP7050418B2 (en) * | 2017-02-01 | 2022-04-08 | 大成建設株式会社 | Construction method of concrete members |
-
1989
- 1989-04-14 JP JP9323089A patent/JPH07944B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02272166A (en) | 1990-11-06 |
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