JP2681296B2 - Mortar or concrete anti-whitening agent and whitening prevention method - Google Patents
Mortar or concrete anti-whitening agent and whitening prevention methodInfo
- Publication number
- JP2681296B2 JP2681296B2 JP3934089A JP3934089A JP2681296B2 JP 2681296 B2 JP2681296 B2 JP 2681296B2 JP 3934089 A JP3934089 A JP 3934089A JP 3934089 A JP3934089 A JP 3934089A JP 2681296 B2 JP2681296 B2 JP 2681296B2
- Authority
- JP
- Japan
- Prior art keywords
- mortar
- whitening
- fluoride
- silicofluoride
- concrete
- 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
- C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
- C04B22/08—Acids or salts thereof
- C04B22/12—Acids or salts thereof containing halogen in the anion
- C04B22/126—Fluorine compounds, e.g. silico-fluorine compounds
Description
【発明の詳細な説明】 （イ）産業上の利用分野 本発明は、モルタルまたはコンクリート用の白華防止
剤および白華防止方法に関する。DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a bleaching inhibitor for mortar or concrete and a method for preventing bleaching.
（ロ）従来の技術 モルタルまたはコンクリート硬化体の表面に白華が発
生することは、よく知られている。この白華は、硬化体
が建築構造物や着色コンクリート二次製品である場合、
著しく美観を損ねたり、塗料仕上げ作業を困難にした
り、あるいは二次製品の着色を悪くする。(B) Prior art It is well known that efflorescence occurs on the surface of a mortar or hardened concrete. If the hardened material is a building structure or colored concrete secondary product,
It significantly impairs the aesthetic appearance, makes the paint finishing operation difficult, or deteriorates the coloring of the secondary product.
上記の欠点を解消するため、古くから白華の発生防止
方法について、研究がなされたきた。例えば、フッ化物
またはケイフッ化物を含む塗布剤をセメント製品の表面
に塗布したり、フッ化ケイ素ガスで表面処理して、白華
を防止する方法が知られている。In order to eliminate the above-mentioned drawbacks, research has been conducted for a long time on a method for preventing the occurrence of white sinter. For example, a method is known in which a coating agent containing a fluoride or a silicofluoride is applied to the surface of a cement product or the surface is treated with a silicon fluoride gas to prevent white sinter.
（ハ）発明が解決しようとする問題点 しかしながら、前者のような塗布による方法では手間
がかかるし、また、塗布後表面にクラックが発生した場
合、そのクラックから白華が発生し、白華防止効果がな
くなるという欠点がある。(C) Problems to be Solved by the Invention However, the former coating method is troublesome, and if cracks occur on the surface after coating, white cracks are generated from the cracks to prevent white blooms. It has the drawback of not being effective.
これらの欠点が生じない方法として、このフッ化物ま
たはケイフッ化物をモルタルまたはコンクリートの混練
時に練り込む方法が考えられるが、この方法では少量の
添加では十分な白華防止効果はなく、白華防止効果を高
めるために添加量を増すと、セメントの水和が著しく阻
害されるので、実用的でない。As a method that does not cause these defects, a method of kneading this fluoride or silicofluoride at the time of kneading mortar or concrete can be considered, but in this method, addition of a small amount does not have a sufficient effect of preventing white flower and an effect of preventing white flower. If the addition amount is increased to increase the cement content, the hydration of cement is significantly impaired, which is not practical.
後者の方法では、フッ化ケイ素ガス自身が危険物であ
り、その取扱いの問題がある。In the latter method, the silicon fluoride gas itself is a dangerous substance and there is a problem in its handling.
（ニ）問題点を解決するための手段 そこで、本発明者らは、白華防止剤をモルタルまたは
コンクリートに練り込む方法において、これらの欠点の
ない白華防止方法について研究した結果、このような欠
点のあるフッ化物またはケイフッ化物を用い、しかもセ
メントに添加すれば白華の原因となりやすいといわれる
アルカリ塩のうち、特定の種類を選択し、その両者を特
定の割合で併用すれば、フッ化物またはケイフッ化物の
単独使用に比べて、より少量の添加量で白華防止効果が
顕著となり、しかもセメントの水和に対する影響は実用
上問題がない程度であるとの知見を得て、本発明を完成
するにいたった。(D) Means for Solving the Problems Then, the inventors of the present invention have studied on a whitening prevention method which does not have these defects in the method of kneading the whitening prevention agent into mortar or concrete, and as a result, If you use a defective fluoride or silicofluoride, and if you add it to the cement, it is easy to cause white sinter. Or, compared with the use of silicofluoride alone, the effect of preventing white sinter becomes significant with a smaller addition amount, and the effect on cement hydration was found to be practically unproblematic, and the present invention was achieved. It came to completion.
すなわち、本発明の要旨は、第１にフッ化物またはケ
イフッ化物とカリウム塩との混合物からなり、それらの
割合が重量比で1:5〜20であることを特徴とするモルタ
ルまたはコンクリートの白華防止剤、第２にフッ化物ま
たはケイフッ化物とカリウム塩との割合が重量比で1:5
〜20であり、それらが合量でセメントに対し0.5〜５重
量％添加されたモルタルまたはコンクリート原料を用い
ることを特徴とするモルタルまたはコンクリートの白華
防止方法にある。That is, the gist of the present invention is, firstly, a mixture of a fluoride or silicofluoride and a potassium salt, the ratio of which is 1: 5 to 20 in weight ratio. Inhibitor, secondly the weight ratio of fluoride or silicofluoride to potassium salt is 1: 5.
-20, and the use of a mortar or concrete raw material added in a total amount of 0.5 to 5% by weight with respect to cement is a method for preventing whitening of mortar or concrete.
フッ化物としては、フッ化アルミニウム、フッ化水素
カリウム、フッ化カリウムなど水に溶けてF-を生成する
成分を有するものである。The fluoride has a component such as aluminum fluoride, potassium hydrogen fluoride, or potassium fluoride that dissolves in water to produce F − .
ケイフッ化物としては、ケイフッ化水素酸、ケイフッ
化マグネシウム、ケイフッ化リチウム、ケイフッ化カリ
ウムなど水に溶けてSiF- 6を生成する成分を有するもの
である。The silicofluoride is one that has a component such as hydrosilicofluoric acid, magnesium silicofluoride, lithium silicofluoride, and potassium silicofluoride that dissolves in water to produce SiF - 6 .
カリウム塩としては、アルミン酸カリウム、水溶性ケ
イ酸カリウム、シュウ酸カリウム、炭酸カリウムなどCa
2+と反応して不溶性塩を生成するものである。As potassium salts, potassium aluminate, water-soluble potassium silicate, potassium oxalate, potassium carbonate, etc.
It reacts with 2+ to form an insoluble salt.
フッ化物またはケイフッ化物に対するカリウム塩の割
合が５より小さいと、フッ化物またはケイフッ化物が有
する欠点を解消することができない。また、その割合が
20を越えると急結したり、白華が発生しやすくなる。If the ratio of potassium salt to fluoride or silicofluoride is less than 5, the drawbacks of fluoride or silicofluoride cannot be eliminated. Moreover, the ratio is
If it exceeds 20, it is likely to be quickly settled and white liquor is likely to occur.
（ホ）実施例 フッ化アルミニウム（関東化学（株）製純薬）、ケイ
フッ化リチウム（関東化学（株）製純薬）、アルミン酸
カリウム（住友化学工業（株）製）炭酸カリウム（関東
化学（株）製純薬）、アルミン酸ナトリウム（昭和電工
（株）製）をそれぞれ表−１に示す割合で、それらの合
量がセメントに対し３重量％となるようにセメントモル
タル原料に添加した。(E) Example Aluminum Fluoride (Kanto Chemical Co., Inc. Pure Chemical), Lithium Silicate Fluoride (Kanto Chemical Co., Inc. Pure Chemical), Potassium Aluminate (Sumitomo Chemical Co., Ltd.) Potassium Carbonate (Kanto Chemical) Pure medicine manufactured by Co., Ltd. and sodium aluminate (manufactured by Showa Denko KK) were added to the cement mortar raw material at the ratios shown in Table 1 so that the total amount thereof was 3% by weight with respect to the cement. .
白華発生試験については、一般に用いられている
（財）建材試験センター法に準じて行ない、供試体の養
生条件として、水溶性アルカリ塩の白華を調べるため
に、７℃、50％R.H.で、また、炭酸カルシウムの白華を
調べるために、40℃、40％R.H.とした。その結果を表−
１に示す。The white flower development test was conducted in accordance with the generally used Building Material Testing Center method, and at 7 ° C and 50% RH as the curing conditions of the test sample, in order to investigate the white water of the water-soluble alkali salt. Moreover, in order to examine the white sinter of calcium carbonate, it was set to 40 ° C. and 40% RH. Table-
It is shown in FIG.
つぎに、実施例２に示した配合割合の白華防止剤とフ
ッ化アルミニウムについて、その添加量を変えた場合の
白華発生試験および強度試験を行なった。強度試験につ
いては、JISR−5201に準じて行ない、材令３日の圧縮強
度を求め、白華防止剤の入らないプレーンのモルタルの
強度を100としてそれに対する比で表示した。それらの
結果を表−２に示す。 Next, with respect to the anti-white flower inhibitor and aluminum fluoride having the compounding ratios shown in Example 2, a white flower generation test and a strength test were performed when the addition amounts were changed. The strength test was carried out in accordance with JIS R-5201, and the compressive strength on the 3rd day of age was calculated. The strength of plain mortar containing no anti-whitening agent was taken as 100 and expressed as a ratio to that. Table 2 shows the results.
（ヘ）発明の効果 本発明の白華防止剤をセメントに対し0.5〜５重量％
モルタルまたはコンクリート原料に添加することによ
り、その硬化体の強度をあまり低下させることなく、白
華の発生を防止することができる。 (F) Effect of the invention The anti-white flower agent of the present invention is 0.5 to 5% by weight with respect to the cement.
By adding it to the mortar or concrete raw material, it is possible to prevent the occurrence of white sinter without significantly lowering the strength of the cured product.
Claims (2)
との混合物からなり、それらの割合が重量比で1:5〜20
であることを特徴とするモルタルまたはコンクリートの
白華防止剤。1. A mixture of fluoride or silicofluoride and potassium salt, the ratio of which is 1: 5 to 20 by weight.
An anti-whitening agent for mortar or concrete.
との割合が重量比で1:5〜20であり、それらが合量でセ
メントに対し0.5〜５重量％添加されたモルタルまたは
コンクリート原料を用いることを特徴とするモルタルま
たはコンクリートの白華防止方法。2. A mortar or concrete raw material in which the weight ratio of the fluoride or silicofluoride to the potassium salt is 1: 5 to 20 and the total amount of them is 0.5 to 5% by weight relative to the cement. A method for preventing white sinter of mortar or concrete, which is characterized in that
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3934089A JP2681296B2 (en) | 1989-02-21 | 1989-02-21 | Mortar or concrete anti-whitening agent and whitening prevention method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3934089A JP2681296B2 (en) | 1989-02-21 | 1989-02-21 | Mortar or concrete anti-whitening agent and whitening prevention method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02221140A JPH02221140A (en) | 1990-09-04 |
| JP2681296B2 true JP2681296B2 (en) | 1997-11-26 |
Family
ID=12550360
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3934089A Expired - Lifetime JP2681296B2 (en) | 1989-02-21 | 1989-02-21 | Mortar or concrete anti-whitening agent and whitening prevention method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2681296B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09263432A (en) * | 1989-09-27 | 1997-10-07 | Kazuo Ito | Method for preventing efflorescence of concrete structure |
| DE19512959A1 (en) * | 1995-04-10 | 1996-10-17 | Sel Alcatel Ag | Remote monitoring device |
| JP2001207584A (en) | 2000-01-31 | 2001-08-03 | Nichiha Corp | Colored building board and method for manufacturing |
| KR101083012B1 (en) * | 2010-11-18 | 2011-11-15 | 주식회사트라이포드 | Silicate-formate complex composition and concrete composition containing the same |
-
1989
- 1989-02-21 JP JP3934089A patent/JP2681296B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02221140A (en) | 1990-09-04 |
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