JPH02221140A - Efflorescence inhibitor for mortar or concrete and method for preventing efflorescence - Google Patents
Efflorescence inhibitor for mortar or concrete and method for preventing efflorescenceInfo
- Publication number
- JPH02221140A JPH02221140A JP3934089A JP3934089A JPH02221140A JP H02221140 A JPH02221140 A JP H02221140A JP 3934089 A JP3934089 A JP 3934089A JP 3934089 A JP3934089 A JP 3934089A JP H02221140 A JPH02221140 A JP H02221140A
- Authority
- JP
- Japan
- Prior art keywords
- efflorescence
- mortar
- concrete
- fluoride
- inhibitor
- 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
- 238000006253 efflorescence Methods 0.000 title claims abstract description 30
- 206010037844 rash Diseases 0.000 title claims abstract description 30
- 239000004567 concrete Substances 0.000 title claims abstract description 15
- 239000004570 mortar (masonry) Substances 0.000 title claims abstract description 15
- 239000003112 inhibitor Substances 0.000 title claims abstract description 8
- 238000000034 method Methods 0.000 title claims description 12
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 claims abstract description 13
- 239000004568 cement Substances 0.000 claims abstract description 8
- 239000000203 mixture Substances 0.000 claims abstract description 3
- XAEFZNCEHLXOMS-UHFFFAOYSA-M potassium benzoate Chemical compound [K+].[O-]C(=O)C1=CC=CC=C1 XAEFZNCEHLXOMS-UHFFFAOYSA-M 0.000 claims description 5
- 239000002994 raw material Substances 0.000 claims description 4
- KLZUFWVZNOTSEM-UHFFFAOYSA-K Aluminium flouride Chemical compound F[Al](F)F KLZUFWVZNOTSEM-UHFFFAOYSA-K 0.000 abstract description 5
- 150000003839 salts Chemical class 0.000 abstract description 3
- 229910020440 K2SiF6 Inorganic materials 0.000 abstract 1
- WPUINVXKIPAAHK-UHFFFAOYSA-N aluminum;potassium;oxygen(2-) Chemical compound [O-2].[O-2].[Al+3].[K+] WPUINVXKIPAAHK-UHFFFAOYSA-N 0.000 abstract 1
- 239000007858 starting material Substances 0.000 abstract 1
- 239000000126 substance Substances 0.000 description 8
- 238000012360 testing method Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 4
- IRPGOXJVTQTAAN-UHFFFAOYSA-N 2,2,3,3,3-pentafluoropropanal Chemical compound FC(F)(F)C(F)(F)C=O IRPGOXJVTQTAAN-UHFFFAOYSA-N 0.000 description 3
- 230000036571 hydration Effects 0.000 description 3
- 238000006703 hydration reaction Methods 0.000 description 3
- ABTOQLMXBSRXSM-UHFFFAOYSA-N silicon tetrafluoride Chemical compound F[Si](F)(F)F ABTOQLMXBSRXSM-UHFFFAOYSA-N 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 150000001447 alkali salts Chemical class 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 229910000027 potassium carbonate Inorganic materials 0.000 description 2
- NROKBHXJSPEDAR-UHFFFAOYSA-M potassium fluoride Chemical compound [F-].[K+] NROKBHXJSPEDAR-UHFFFAOYSA-M 0.000 description 2
- KVOIJEARBNBHHP-UHFFFAOYSA-N potassium;oxido(oxo)alumane Chemical compound [K+].[O-][Al]=O KVOIJEARBNBHHP-UHFFFAOYSA-N 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- ASZZHBXPMOVHCU-UHFFFAOYSA-N 3,9-diazaspiro[5.5]undecane-2,4-dione Chemical compound C1C(=O)NC(=O)CC11CCNCC1 ASZZHBXPMOVHCU-UHFFFAOYSA-N 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- -1 Lithium fluorosilicate Chemical compound 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 239000004111 Potassium silicate Substances 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- ANBBXQWFNXMHLD-UHFFFAOYSA-N aluminum;sodium;oxygen(2-) Chemical compound [O-2].[O-2].[Na+].[Al+3] ANBBXQWFNXMHLD-UHFFFAOYSA-N 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 239000011083 cement mortar Substances 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- IRXRGVFLQOSHOH-UHFFFAOYSA-L dipotassium;oxalate Chemical compound [K+].[K+].[O-]C(=O)C([O-])=O IRXRGVFLQOSHOH-UHFFFAOYSA-L 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011698 potassium fluoride Substances 0.000 description 1
- 235000003270 potassium fluoride Nutrition 0.000 description 1
- 159000000001 potassium salts Chemical class 0.000 description 1
- NNHHDJVEYQHLHG-UHFFFAOYSA-N potassium silicate Chemical compound [K+].[K+].[O-][Si]([O-])=O NNHHDJVEYQHLHG-UHFFFAOYSA-N 0.000 description 1
- 229910052913 potassium silicate Inorganic materials 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 229910001388 sodium aluminate Inorganic materials 0.000 description 1
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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
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 an efflorescence inhibitor and a method for preventing efflorescence for mortar or concrete.
（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 mortar or hardened concrete. This efflorescence can significantly impair the aesthetics of architectural structures or colored concrete secondary products, and make paint finishing difficult.
Or it may make the coloring of the secondary product worse.
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、研究がなされてきた。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 methods for preventing the occurrence of efflorescence. For example, methods are known in which efflorescence is prevented by applying a coating agent containing fluoride or silicon fluoride to the surface of a cement product, or by treating the surface with silicon fluoride gas.
（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 time-consuming, and if cracks occur on the surface after coating, efflorescence will occur from the cracks, making it difficult to prevent efflorescence. The drawback is that it is ineffective.
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。One possible method to avoid these drawbacks is to mix fluoride or silicofluoride into mortar or concrete during mixing, but this method does not have a sufficient efflorescence prevention effect even if added in small amounts; If the amount added is increased in order to increase the hydration, the hydration of the cement will be significantly inhibited, so it 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 are problems 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 Therefore, the present inventors have researched a method of preventing efflorescence that does not have these drawbacks in a method of kneading an efflorescence preventive agent into mortar or concrete. If you use fluoride or fluorosilicide, which have drawbacks, and select a specific type of alkali salt that is said to easily cause efflorescence when added to cement, and use both in a specific ratio, fluoride In addition, the present invention has been developed based on the knowledge that the effect of preventing efflorescence is significant with a smaller amount of addition compared to the use of silicofluoride alone, and that the effect on cement hydration is of a level that causes no practical problems. It was completed.
すなわち、本発明の要旨は、第１にフン化物またはケイ
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 mortar or concrete efflorescence comprising a mixture of a fluoride or a silicofluoride and a potassium salt, the ratio of which is 1:5 to 20 by weight. inhibitor, secondly a fluoride or fluorosilicide and a potassium salt in a weight ratio of 1;
: 5 to 20, and the total amount of them is 0.
A method for preventing efflorescence in mortar or concrete, characterized by using a mortar or concrete raw material containing 5 to 5% by weight.
フッ化物としては、フッ化アルミニウム、フン化水素カ
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 includes a component that dissolves in water to produce F-, such as aluminum fluoride, potassium hydrogen fluoride, and potassium fluoride.
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Ｓｉｌ”６を生成する成分を有するも
のである。Examples of the silicofluoride include hydrofluorosilicic acid, magnesium fluorosilicide, lithium fluorosilicide, and potassium fluorosilicide, which have components that dissolve in water to produce Sil''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
”と反応して不溶性塩を生成するものである。Potassium salts include potassium aluminate, water-soluble potassium silicate, potassium oxalate, potassium carbonate, etc.
” 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。If the ratio of potassium salt to fluoride or silicofluoride is less than 5, the disadvantages of fluoride or silicofluoride cannot be overcome.
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。Moreover, if the ratio exceeds 20, rapid setting or efflorescence is likely to occur.
（ホ）実施例
フン化アルミニウム（関東化学■製純薬）、ケイフッ化
リチウム（関東化学■製純薬）、アルミン酸カリウム（
住友化学工業■製）炭酸カリウム（関東化学■製純薬）
、アルミン酸ナトリウム（昭和電工ｕｌｌ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) Examples Aluminum fluoride (Kanto Kagaku ■ Pure Chemical), Lithium fluorosilicate (Kanto Chemical ■ Pure Chemical), Potassium aluminate (Kanto Chemical ■ Pure Chemical)
Potassium carbonate (manufactured by Sumitomo Chemical) (pure drug manufactured by Kanto Chemical)
and sodium aluminate (manufactured by Showa Denko Ull) were added to the cement mortar raw material in the proportions shown in Table 1 so that the total amount was 3% by weight based on 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 ”Ｃ１４０％Ｒ，Ｈ，とした。その
結果を表−１に示す。Regarding the efflorescence test, the commonly used
The test was carried out in accordance with the Building Materials Testing Center method, and the specimen was cured at 7°C in order to examine the efflorescence of water-soluble alkali salts.
, 50% R,H, and 40''C140%R,H to examine the efflorescence of calcium carbonate.The results are shown in Table-1.
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０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。Next, regarding the zero strength test in which the efflorescence generation test and the strength test were conducted when the addition amount was changed for the anti-efflorescence agent and aluminum fluoride in the compounding ratio shown in Example 2, JISR-5201 was used. The compressive strength after 3 days of age was determined and expressed as a ratio to the strength of plain mortar without an efflorescence inhibitor as 100.
それらの結果を表−２に示す。The results are shown in Table-2.
（へ）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) Effects of the invention The efflorescence inhibitor of the present invention is contained in an amount of 0.5 to 5% by weight based on cement.
By adding it to mortar or concrete raw materials, it is possible to prevent the occurrence of efflorescence without significantly reducing the strength of the cured product.
Claims (1)
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。（２）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。(1) An efflorescence inhibitor for mortar or concrete consisting of a mixture of a fluoride or a fluorosilicide and a potassium salt, the ratio of which is 1:5 to 20 by weight. (2) Use mortar or concrete raw materials in which the weight ratio of fluoride or fluorosilicide and potassium salt is 1:5 to 20, and the total amount of these is 0.5 to 5% by weight relative to cement. A method for preventing efflorescence of mortar or concrete, characterized by:
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 true JPH02221140A (en) | 1990-09-04 |
| JP2681296B2 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) |
Cited By (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 |
| US5717379A (en) * | 1995-04-10 | 1998-02-10 | Alcatel N.V. | Remote monitoring system |
| US6740423B2 (en) | 2000-01-31 | 2004-05-25 | Nichiha Corporation | Colored building boards, manufacturing methods thereof |
| WO2012067304A1 (en) * | 2010-11-18 | 2012-05-24 | 주식회사 포스코건설 | Silicate-formate-based organic/inorganic composite composition and concrete composition containing same |
-
1989
- 1989-02-21 JP JP3934089A patent/JP2681296B2/en not_active Expired - Lifetime
Cited By (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 |
| US5717379A (en) * | 1995-04-10 | 1998-02-10 | Alcatel N.V. | Remote monitoring system |
| US6740423B2 (en) | 2000-01-31 | 2004-05-25 | Nichiha Corporation | Colored building boards, manufacturing methods thereof |
| WO2012067304A1 (en) * | 2010-11-18 | 2012-05-24 | 주식회사 포스코건설 | Silicate-formate-based organic/inorganic composite composition and concrete composition containing same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2681296B2 (en) | 1997-11-26 |
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