JP2001302303A - Chromium-proofing sealant - Google Patents

Chromium-proofing sealant

Info

Publication number
JP2001302303A
JP2001302303A JP2000163688A JP2000163688A JP2001302303A JP 2001302303 A JP2001302303 A JP 2001302303A JP 2000163688 A JP2000163688 A JP 2000163688A JP 2000163688 A JP2000163688 A JP 2000163688A JP 2001302303 A JP2001302303 A JP 2001302303A
Authority
JP
Japan
Prior art keywords
chromium
cement
weight
sealant
proofing sealant
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
Application number
JP2000163688A
Other languages
Japanese (ja)
Inventor
Hitoshi Hatano
倫 波多野
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nihon Solid Co Ltd
Original Assignee
Nihon Solid Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nihon Solid Co Ltd filed Critical Nihon Solid Co Ltd
Priority to JP2000163688A priority Critical patent/JP2001302303A/en
Publication of JP2001302303A publication Critical patent/JP2001302303A/en
Pending legal-status Critical Current

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
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
    • 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
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
    • 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
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
    • C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
    • C04B41/5007—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with salts or salty compositions, e.g. for salt glazing
    • 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
    • C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
    • C04B2103/0004—Compounds chosen for the nature of their cations
    • C04B2103/0013—Iron group metal compounds
    • C04B2103/0014—Fe
    • 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
    • C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
    • C04B2103/0068—Ingredients with a function or property not provided for elsewhere in C04B2103/00
    • C04B2103/0096—Reducing agents
    • 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
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
    • C04B2111/00767—Uses not provided for elsewhere in C04B2111/00 for waste stabilisation purposes
    • C04B2111/00775—Uses not provided for elsewhere in C04B2111/00 for waste stabilisation purposes the composition being used as waste barriers or the like, e.g. compositions used for waste disposal purposes only, but not containing the waste itself
    • 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
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/20—Resistance against chemical, physical or biological attack
    • C04B2111/2092—Resistance against biological degradation
    • 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
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/74—Underwater applications

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a chromium-proofing sealant capable of preventing chromium from leaking out of a cement structure and also preventing algae from adhering to an underwater cement structure. SOLUTION: This chromium-proofing sealant contains a reducing agent and titanium oxide.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】本発明は、セメントに添加し
たり、コンクリート構造物等に塗布してクロム化合物の
漏出を防止する為のクロム封止剤に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chromium sealant which is added to cement or applied to concrete structures to prevent leakage of chromium compounds.

【０００２】[0002]

【従来の技術】従来セメント製品等からクロムの流出を
防止する方法としては、（１）生コンクリート製造また
はセメント製品製造においてセメント、骨材及び水の練
り混ぜに際し、使用水に所要の第一鉄塩溶液を添加する
ことを特徴とする廃水中にクロムイオンを生じないセメ
ント製品の製造方法（特開昭５０−４３１２３号公報参
照）、（２）クロム酸鉛を含む汚泥等に硫酸第一鉄とセ
メントとを添加混合して固化する事を特徴とするクロム
酸鉛を含む汚泥等の安定無害化処理方法（特開昭５３−
１５２６４号公報参照）、（３）還元剤を含有すること
を特徴とするセメント添加剤（特開平３−２０５３３１
号公報参照）等が挙げられる。2. Description of the Related Art Conventionally, methods for preventing the outflow of chromium from cement products and the like are as follows: (1) When mixing cement, aggregate and water in the production of ready-mixed concrete or cement products, ferrous iron required for use in water is used. A method for producing a cement product that does not generate chromium ions in wastewater, characterized by adding a salt solution (see JP-A-50-43123); (2) ferrous sulfate in sludge containing lead chromate And stabilization of sludge and the like containing lead chromate, characterized by adding and mixing the cement and cement (Japanese Patent Application Laid-Open No.
No. 15264), and (3) a cement additive containing a reducing agent (JP-A-3-205331).
Reference).

【０００３】[0003]

【発明が解決しようとする課題】本発明は、前記の従来
技術より更に優れた技術を開発すべく種々研究を重ねた
結果本発明を完成するに至った。SUMMARY OF THE INVENTION The present invention has been completed by conducting various studies in order to develop a technique superior to the above-mentioned prior art.

【０００４】[0004]

【課題を解決するための手段】すなわち、本発明は、酸
化チタン及び還元剤を含有するクロム封止剤及びこのク
ロム封止剤に銀を添加してなるクロム封止剤に関する。That is, the present invention relates to a chromium sealant containing titanium oxide and a reducing agent, and a chromium sealant obtained by adding silver to the chromium sealant.

【０００５】[0005]

【発明の実施の形態】本発明に使用する還元剤としては
第一鉄、第一錫、第一バナジウム、第一銅等のイオンか
ら構成される塩類が挙げられ、これらの塩類としては硫
酸塩、硝酸塩、塩化物等種々の塩類が挙げられるが、な
かでも特に硫酸塩が好ましい。DESCRIPTION OF THE PREFERRED EMBODIMENTS The reducing agent used in the present invention includes salts composed of ions such as ferrous, stannous, vanadium and cuprous, and these salts include sulfates. , Nitrates, chlorides and the like, and among them, sulfate is particularly preferable.

【０００６】一方還元剤と併用する酸化チタンとしては
平方晶系で高温型のルチル型、低温型のアナターゼ型、
斜方晶系のブルックカイト型のいずれの物でも使用し得
るがなかでもアナターゼ型のものが好ましい。On the other hand, titanium oxide used in combination with a reducing agent is a square-crystal type high-temperature type rutile type, a low-temperature type anatase type,
Although any of the orthorhombic Brookite kits can be used, the anatase type is preferred.

【０００７】前記酸化チタンの添加量は特に制限されな
いが一般的には環元剤に対し１０〜５０００重量％、好
ましくは１００〜２０００重量％、更に好ましくは２０
０〜１０００重量％添加することが望ましい。The amount of the titanium oxide to be added is not particularly limited, but is generally 10 to 5000% by weight, preferably 100 to 2000% by weight, more preferably 20% by weight, based on the reducing agent.
It is desirable to add 0 to 1000% by weight.

【０００８】また 本発明のクロム封止剤に添加する銀
の添加量は酸化チタンに対し１〜３０重量％の範囲が好
ましい。The amount of silver added to the chromium sealant of the present invention is preferably in the range of 1 to 30% by weight based on titanium oxide.

【０００９】本発明に係るクロム封止剤をセメント中に
添加してセメント構造物を構築すると、セメント構造物
中にクロムイオンを封止することができると共に、セメ
ント構造物の表面においては酸化チタンの光触媒作用に
より無害化することができる。[0009] When the cement structure is constructed by adding the chromium sealant according to the present invention to cement, chromium ions can be sealed in the cement structure, and titanium oxide is provided on the surface of the cement structure. Can be rendered harmless by the photocatalytic action of

【００１０】さらに前記クロム封止剤に銀を添加すると
相乗効果により一層効果が高められる。さらに水中のセ
メント構造物にあっては藻類の付着も防止することがで
きる。Further, when silver is added to the chromium sealant, the effect is further enhanced by a synergistic effect. Further, in the case of a submerged cement structure, adhesion of algae can also be prevented.

【００１１】本発明のクロム封止剤はセメントに対し
０．０１〜７．５重量％、好ましくは０．１〜３重量
％、更に好ましくは０．３〜１．５重量％添加すること
が望ましい。また他の態様として本発明のクロム封止剤
を皮膜形成剤と混合してセメント構造物表面に塗布して
も同様な効果が得られる。The chromium sealant of the present invention may be added in an amount of 0.01 to 7.5% by weight, preferably 0.1 to 3% by weight, more preferably 0.3 to 1.5% by weight, based on cement. desirable. In another embodiment, the same effect can be obtained by mixing the chromium sealant of the present invention with a film forming agent and applying the mixture to the surface of a cement structure.

【００１２】[0012]

【実施例】ポルトランドセメント１００重量部、砂２８
０重量部、砂利３９０重量部、クロム封止剤０．４６重
量部に水５８重量部を加えて混練しコンクリートブロッ
クを製造した。このコンクリートブロックを養生後コン
クリートブロックの１０倍の水に浸漬して１ヶ月間放置
し水中の全クロムを測定した結果０．５ｐｐｍであっ
た。また同じコンクリートブロックを海に懸吊して６ヶ
月間放置したが藻の付着はまったく認められなかった。EXAMPLE 100 parts by weight of Portland cement, sand 28
58 parts by weight of water was added to 0 parts by weight, 390 parts by weight of gravel, and 0.46 parts by weight of a chrome sealant, and kneaded to produce a concrete block. After the concrete block was cured, it was immersed in 10 times the water of the concrete block and left for one month, and the total chromium in the water was measured. As a result, it was 0.5 ppm. Further, the same concrete block was suspended in the sea and left for 6 months, but no adhesion of algae was observed at all.

【００１３】[0013]

【発明の効果】本発明のクロム封止剤を使用してコンク
リート構造物を構築することによってクロムの漏出を防
止することができ、また水中セメント構造物においては
藻類の付着もまったくない。According to the present invention, the construction of a concrete structure using the chromium sealant of the present invention can prevent the leakage of chromium, and there is no adhesion of algae in the underwater cement structure.

───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｃ０４Ｂ 28/02 Ｃ０４Ｂ 28/02 // Ｅ０２Ｂ 1/00 ３０１ Ｅ０２Ｂ 1/00 ３０１Ｚ Ｃ０４Ｂ 103:60 Ｃ０４Ｂ 103:60 111:20 111:20 ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat ゛ (Reference) C04B 28/02 C04B 28/02 // E02B 1/00 301 E02B 1/00 301Z C04B 103: 60 C04B 103: 60 111: 20 111: 20

Claims (2)

【特許請求の範囲】[Claims] 【請求項１】還元剤、酸化チタン及び銀を含有すること
を特徴とするクロム封止剤。1. A chromium sealant comprising a reducing agent, titanium oxide and silver. 【請求項２】還元剤及び酸化チタンを含有することを特
徴とするセメント添加剤。2. A cement additive comprising a reducing agent and titanium oxide.
JP2000163688A 2000-04-25 2000-04-25 Chromium-proofing sealant Pending JP2001302303A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2000163688A JP2001302303A (en) 2000-04-25 2000-04-25 Chromium-proofing sealant

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2000163688A JP2001302303A (en) 2000-04-25 2000-04-25 Chromium-proofing sealant

Publications (1)

Publication Number Publication Date
JP2001302303A true JP2001302303A (en) 2001-10-31

Family

ID=18667409

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2000163688A Pending JP2001302303A (en) 2000-04-25 2000-04-25 Chromium-proofing sealant

Country Status (1)

Country Link
JP (1) JP2001302303A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4750029B2 (en) * 2003-08-08 2011-08-17 クリソ Aqueous colloidal suspensions of hydroxides of at least one transition element for reducing chromium in cement

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4750029B2 (en) * 2003-08-08 2011-08-17 クリソ Aqueous colloidal suspensions of hydroxides of at least one transition element for reducing chromium in cement

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