JPH06100343A - Cement additive composition - Google Patents
Cement additive compositionInfo
- Publication number
- JPH06100343A JPH06100343A JP29064192A JP29064192A JPH06100343A JP H06100343 A JPH06100343 A JP H06100343A JP 29064192 A JP29064192 A JP 29064192A JP 29064192 A JP29064192 A JP 29064192A JP H06100343 A JPH06100343 A JP H06100343A
- Authority
- JP
- Japan
- Prior art keywords
- agent
- hexavalent chromium
- salts
- water
- reducing agent
- 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
- 239000004568 cement Substances 0.000 title claims abstract description 28
- 239000000654 additive Substances 0.000 title claims abstract description 16
- 230000000996 additive effect Effects 0.000 title claims abstract description 14
- 239000000203 mixture Substances 0.000 title claims abstract description 13
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 14
- 239000003795 chemical substances by application Substances 0.000 abstract description 18
- JOPOVCBBYLSVDA-UHFFFAOYSA-N chromium(6+) Chemical compound [Cr+6] JOPOVCBBYLSVDA-UHFFFAOYSA-N 0.000 abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 14
- 150000003839 salts Chemical class 0.000 abstract description 7
- 239000011790 ferrous sulphate Substances 0.000 abstract description 4
- 235000003891 ferrous sulphate Nutrition 0.000 abstract description 4
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 abstract description 4
- 229910000359 iron(II) sulfate Inorganic materials 0.000 abstract description 4
- 239000000126 substance Substances 0.000 abstract description 4
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical class [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 abstract description 2
- 238000006253 efflorescence Methods 0.000 abstract description 2
- -1 ferrous sulfate Chemical class 0.000 abstract description 2
- 239000004088 foaming agent Substances 0.000 abstract description 2
- 238000002347 injection Methods 0.000 abstract description 2
- 239000007924 injection Substances 0.000 abstract description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 abstract description 2
- 239000004014 plasticizer Substances 0.000 abstract description 2
- 206010037844 rash Diseases 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 9
- 239000000463 material Substances 0.000 description 4
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000003912 environmental pollution Methods 0.000 description 2
- 238000004898 kneading Methods 0.000 description 2
- 239000000395 magnesium oxide Substances 0.000 description 2
- 230000003449 preventive effect Effects 0.000 description 2
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000004996 alkyl benzenes Chemical class 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000002528 anti-freeze Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 150000003841 chloride salts Chemical class 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000011440 grout Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 150000002823 nitrates Chemical class 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000008030 superplasticizer Substances 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 238000004078 waterproofing Methods 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 or shrinkage compensating agents
- C04B22/08—Acids or salts thereof
- C04B22/14—Acids or salts thereof containing sulfur in the anion, e.g. sulfides
-
- 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
- C04B2111/10—Compositions or ingredients thereof characterised by the absence or the very low content of a specific material
- C04B2111/1075—Chromium-free or very low chromium-content materials
- C04B2111/1081—Chromium VI, e.g. for avoiding chromium eczema
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
【０００１】[0001]
【産業上の利用分野】本発明は、セメントの添加剤に関
する。FIELD OF THE INVENTION The present invention relates to cement additives.
【０００２】[0002]
【従来の技術】セメントは製造時に使用する焼成窯のク
ロム−マグネシア系の耐火材と原料間の種々の高温熱化
学反応を経て微量ではあるが、不可逆的な六価クロムを
含有している。この六価クロムはセメントと水が混練さ
れると、その水中に溶解し、その水が流出することなく
コンクリートとして固化する場合には六価クロムはコン
クリート中に固定され問題となることはないが、ブリー
ジング水として放出される場合および未固化の状態で洗
浄水と混合されて放出される場合は環境に放流されて環
境汚染の点から問題となっていた。2. Description of the Related Art Cement contains a small amount of irreversible hexavalent chromium through various high-temperature thermochemical reactions between a chrome-magnesia type refractory material of a firing kiln used in manufacturing and a raw material. This hexavalent chromium dissolves in water when cement and water are kneaded, and when the water solidifies as concrete without flowing out, hexavalent chromium is fixed in the concrete and does not pose a problem. When it is released as breathing water or when it is mixed with washing water in an unsolidified state, it is released into the environment and poses a problem in terms of environmental pollution.
【０００３】このように六価クロムが流出すると、六価
クロムは酸化力が強く、そのため自然界へ流出した場合
は、健康上有害な物質として各種法令で厳しく規制され
ている。従来このような問題点を解決するために種々の
方法が提案されている。すなわち（１）六価クロムを含
有しないセメントを製造する方法（２）セメントと水と
を混合して出る余剰水あるいは未固化コンクリートから
放出される水を処理して六価クロムを除去する方法が考
えられている。[0006] When hexavalent chromium flows out in this way, hexavalent chromium has a strong oxidizing power. Therefore, when it flows into the natural world, it is strictly regulated by various laws as a harmful substance for health. Conventionally, various methods have been proposed to solve such problems. That is, (1) a method for producing cement containing no hexavalent chromium, and (2) a method for treating the excess water produced by mixing cement and water or the water released from unconsolidated concrete to remove hexavalent chromium. It is considered.
【０００４】しかしながら前記（１）の方法は、製造工
程を大幅に変更する必要があり、耐火材としてクロム−
マグネシア系に代る材質のものが現在明らかになってい
ないために該方法による解決は実質的に不可能である。
また前記（２）の方法は、従来からコンクリート二次製
品の工場等で実施されているが複雑な処理工程を必要と
し、経済的な負担が大きい欠点があった。However, in the method (1), it is necessary to drastically change the manufacturing process.
The solution by this method is practically impossible because no alternative material for magnesia is currently known.
The method (2) has been conventionally practiced in factories and the like for secondary concrete products, but has a drawback that it requires a complicated treatment process and is economically burdensome.
【０００５】[0005]
【発明が解決しようとする課題】本発明者は、前記方法
とは全く別異の方法で環境汚染のない六価クロムの除去
方法につき種々研究を重ねた結果本発明を完成するに至
った。The present inventor has completed various studies on a method for removing hexavalent chromium without environmental pollution by a method completely different from the above method, and as a result, completed the present invention.
【０００６】[0006]
【課題を解決するための手段】すなわち本発明者は、セ
メント中に還元剤を含有するセメント添加剤を混入させ
てセメントと水との混練時にセメント中に含まれる六価
クロムと反応させて六価クロムを不溶性物質となし、コ
ンクリート内に固定または水中から除去するものであ
る。Means for Solving the Problems That is, the present inventor mixed a cement additive containing a reducing agent into cement and reacted with hexavalent chromium contained in the cement during mixing of the cement and water. Chromium is an insoluble substance that is fixed in concrete or removed from water.
【０００７】本発明のセメント添加剤として使用される
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、塩化物等の種々の複塩
が挙げられるが、特に硫酸塩が好ましい。Examples of the reducing agent used as the cement additive of the present invention include salts composed of ions of ferrous iron, stannous, vanadium, cuprous and the like, and these salts include Various double salts such as sulfates, nitrates and chlorides can be mentioned, and sulfates are particularly preferable.
【０００８】これらのセメント添加剤は、マイクロカプ
セル化あるいはコーティングすることによって保存性等
が向上するので好ましい。[0008] These cement additives are preferable because their storage stability is improved by microencapsulation or coating.
【０００９】本発明のセメント添加組成物は、前記セメ
ント添加剤にＡＥ剤、減水剤、ＡＥ減水剤、高性能減水
剤、高性能ＡＥ減水剤、流動化剤、急結剤、凝結遅延
剤、硬化促進剤、防凍・防寒剤、粉じん低減剤、起泡
剤、防水剤、防錆剤、耐酸剤、可塑剤、注入グラウト用
混和剤、プレパックド用混和剤、水中不分離性混和剤、
エフロレッセンス防止剤、膨張材、無収縮材等のコンク
リート混和材料の一種以上を混合してなるものである。The cement additive composition of the present invention comprises an AE agent, a water-reducing agent, an AE water-reducing agent, a high-performance water-reducing agent, a high-performance AE water-reducing agent, a superplasticizer, a quick-setting agent, a setting retarder, Curing accelerator, antifreeze / antifreezing agent, dust reducer, foaming agent, waterproofing agent, rust preventive agent, acid resistance agent, plasticizer, admixture for injection grout, admixture for prepacked, inseparable admixture in water,
It is a mixture of one or more concrete admixture materials such as efflorescence preventive agents, expansive materials and non-shrinkable materials.
【００１０】本発明のセメント添加組成物の使用量は、
セメント添加剤としてはセメント中に含有される六価ク
ロムの理論量の約１．５倍量以上の還元剤量で充分であ
る。またコンクリート混和材料は、それぞれの用途によ
って公知の使用量で用いられる。The amount of the cement additive composition of the present invention used is
As the cement additive, a reducing agent amount of about 1.5 times the theoretical amount of hexavalent chromium contained in the cement or more is sufficient. In addition, the concrete admixture is used in a known amount according to each application.
【００１１】本発明のセメント添加組成物はセメント製
造時に添加するか、あるいは工事等の使用の際にセメン
トと水を混練するときに添加して使用することもでき
る。The cement additive composition of the present invention can be added at the time of producing cement, or can be added at the time of kneading cement and water at the time of use such as construction.
【００１２】実施例１ 硫酸第一鉄とアルキルベンゼンスルフォン酸（ＡＥ剤）
とを混合してセメント添加組成物を調製した。Example 1 Ferrous sulfate and alkylbenzene sulfonic acid (AE agent)
And were mixed to prepare a cement additive composition.
【００１３】実施例２ 硫酸第一鉄とポリエチレンオキサイド（流動化剤）とを
混合してセメント添加組成物を調製した。Example 2 Ferrous sulfate and polyethylene oxide (fluidizing agent) were mixed to prepare a cement additive composition.
【００１４】実施例３ 硫酸第一鉄とアルミナ系鉱物（ベルデンＳ；昭和鉱業
（株）製）（硬化促進剤）とを混合してセメント添加組
成物を調製した。Example 3 A ferrous sulfate and an alumina-based mineral (Belden S; manufactured by Showa Mining Co., Ltd.) (hardening accelerator) were mixed to prepare a cement additive composition.
【００１５】[0015]
【発明の効果】本発明の組成物は、セメントと水との混
練時に添加されていることによって六価クロムを不溶性
物質としてコンクリート中に固定することができると共
に、各コンクリート混和材料の効果が期待できると共に
作業の省力化ができる。The composition of the present invention can fix hexavalent chromium as an insoluble substance in concrete by adding it at the time of kneading cement and water, and expect the effect of each concrete admixture. It is possible and labor saving can be done.
Claims (1)
するセメント添加組成物。1. A cement additive composition containing a reducing agent and a concrete admixture.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29064192A JPH06100343A (en) | 1992-09-18 | 1992-09-18 | Cement additive composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29064192A JPH06100343A (en) | 1992-09-18 | 1992-09-18 | Cement additive composition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06100343A true JPH06100343A (en) | 1994-04-12 |
Family
ID=17758600
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29064192A Pending JPH06100343A (en) | 1992-09-18 | 1992-09-18 | Cement additive composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06100343A (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999016722A1 (en) * | 1997-09-26 | 1999-04-08 | Taiheiyo Cement Corporation | Method of production of cement |
| WO1999037593A1 (en) * | 1998-01-27 | 1999-07-29 | Chemische Werke Zell-Wildshausen Gmbh | Medium for reducing chromium (vi) ions in a water-curing mass |
| EP0960865A1 (en) * | 1998-05-25 | 1999-12-01 | Chemische Werke Zell-Wildshausen GMBH | Agent for the reduction of chromium (VI) ions in cement |
| JP2002327432A (en) * | 2001-05-02 | 2002-11-15 | Hasui Kensetsu Kk | Wet ground improvement method |
| JP2003165758A (en) * | 2001-11-29 | 2003-06-10 | Denki Kagaku Kogyo Kk | Backfill injection material |
| FR2858612A1 (en) * | 2003-08-08 | 2005-02-11 | Chryso Sas | Stable aqueous tin hydroxide suspensions, used for reducing hexavalent chromium content of cement, stabilized mechanically and/or by water-soluble stabilizers, e.g. polyoxyalkylene polycarboxylates |
| EP1533287A1 (en) * | 2003-11-21 | 2005-05-25 | W.R. Grace & Co.-Conn. | Dispersion comprising tin sulfate or ferrous sulfate for reducing chromate in cement |
| WO2005076858A3 (en) * | 2004-02-04 | 2005-12-29 | Grace W R & Co | Liquid additive for intergrinding cement |
| US7232483B2 (en) | 2005-02-01 | 2007-06-19 | W. R. Grace & Co.-Conn. | Cement composition having chromium reducer |
| US7927418B2 (en) | 2006-08-11 | 2011-04-19 | W. R. Grace & Co.-Conn. | Coordinated metal compounds for reducing chromium |
| CN113368741A (en) * | 2021-07-22 | 2021-09-10 | 青海新雨田化工有限公司 | Preparation device and preparation method of water-soluble hexavalent chromium reducing agent in cement |
-
1992
- 1992-09-18 JP JP29064192A patent/JPH06100343A/en active Pending
Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999016722A1 (en) * | 1997-09-26 | 1999-04-08 | Taiheiyo Cement Corporation | Method of production of cement |
| WO1999037593A1 (en) * | 1998-01-27 | 1999-07-29 | Chemische Werke Zell-Wildshausen Gmbh | Medium for reducing chromium (vi) ions in a water-curing mass |
| EP0960865A1 (en) * | 1998-05-25 | 1999-12-01 | Chemische Werke Zell-Wildshausen GMBH | Agent for the reduction of chromium (VI) ions in cement |
| JP2002327432A (en) * | 2001-05-02 | 2002-11-15 | Hasui Kensetsu Kk | Wet ground improvement method |
| JP2003165758A (en) * | 2001-11-29 | 2003-06-10 | Denki Kagaku Kogyo Kk | Backfill injection material |
| FR2858612A1 (en) * | 2003-08-08 | 2005-02-11 | Chryso Sas | Stable aqueous tin hydroxide suspensions, used for reducing hexavalent chromium content of cement, stabilized mechanically and/or by water-soluble stabilizers, e.g. polyoxyalkylene polycarboxylates |
| US7601328B2 (en) | 2003-08-08 | 2009-10-13 | Chryso | Colloidal hydroxide aqueous suspension of at least one transition element serving to reduce chrome in cement |
| WO2005016843A3 (en) * | 2003-08-08 | 2005-07-07 | Chryso Sas | Colloidal hydroxide aqueous suspension of at least one transition element serving to reduce chrome in cement |
| EP1533287A1 (en) * | 2003-11-21 | 2005-05-25 | W.R. Grace & Co.-Conn. | Dispersion comprising tin sulfate or ferrous sulfate for reducing chromate in cement |
| EP2143698A1 (en) * | 2003-11-21 | 2010-01-13 | W.R. Grace & Co.-Conn. | Dispersion comprising tin sulfate or ferrous sulfate for reducing chromate in cement |
| WO2005056860A3 (en) * | 2003-11-21 | 2005-08-11 | Grace W R & Co | Sulfate dispersion chromate reducer |
| US7128782B2 (en) | 2003-11-21 | 2006-10-31 | W.R. Grace & Co.-Conn. | Sulfate dispersion chromate reducer |
| JP2007522061A (en) * | 2003-11-21 | 2007-08-09 | ダブリュー・アール・グレイス・アンド・カンパニー−コネチカット | Sulfate-dispersed chromate reducing agent |
| US7087110B2 (en) | 2004-02-04 | 2006-08-08 | W. R. Grace & Co.-Conn. | Liquid additive for intergrinding cement |
| JP2007520416A (en) * | 2004-02-04 | 2007-07-26 | ダブリュー・アール・グレイス・アンド・カンパニー−コネチカット | Liquid additives for mutual ground cement |
| CN100441533C (en) * | 2004-02-04 | 2008-12-10 | 格雷斯公司 | A method for reducing hexavalent chromium in cement composition |
| WO2005076858A3 (en) * | 2004-02-04 | 2005-12-29 | Grace W R & Co | Liquid additive for intergrinding cement |
| US7232483B2 (en) | 2005-02-01 | 2007-06-19 | W. R. Grace & Co.-Conn. | Cement composition having chromium reducer |
| US7927418B2 (en) | 2006-08-11 | 2011-04-19 | W. R. Grace & Co.-Conn. | Coordinated metal compounds for reducing chromium |
| CN113368741A (en) * | 2021-07-22 | 2021-09-10 | 青海新雨田化工有限公司 | Preparation device and preparation method of water-soluble hexavalent chromium reducing agent in cement |
| CN113368741B (en) * | 2021-07-22 | 2023-09-05 | 青海新雨田化工有限公司 | Preparation device and preparation method of water-soluble hexavalent chromium reducer in cement |
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