RO90804B - PROCEDEU DE REDUCERE A CONTINUTULUI DE CROM HEXAVALENT SOLUBIL îN APA, DIN CIMENT - Google Patents

PROCEDEU DE REDUCERE A CONTINUTULUI DE CROM HEXAVALENT SOLUBIL îN APA, DIN CIMENT

Info

Publication number
RO90804B
RO90804B RO115758A RO11575884A RO90804B RO 90804 B RO90804 B RO 90804B RO 115758 A RO115758 A RO 115758A RO 11575884 A RO11575884 A RO 11575884A RO 90804 B RO90804 B RO 90804B
Authority
RO
Romania
Prior art keywords
cement
reducing
chromium content
soluble chromium
hexavalent
Prior art date
Application number
RO115758A
Other languages
English (en)
Other versions
RO90804A (ro
Inventor
Per Norelius
Original Assignee
Cementa Ab
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 Cementa Ab filed Critical Cementa Ab
Publication of RO90804A publication Critical patent/RO90804A/ro
Publication of RO90804B publication Critical patent/RO90804B/ro

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
    • C04B22/0006—Waste inorganic materials
    • 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
    • C04B11/00—Calcium sulfate cements
    • 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
    • C04B22/14—Acids or salts thereof containing sulfur in the anion, e.g. sulfides
    • C04B22/142—Sulfates
    • C04B22/149—Iron-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
    • C04B7/00—Hydraulic cements
    • C04B7/22—Iron ore cements ; Iron rich cements, e.g. Ferrari cements, Kühl cements
    • 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)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Environmental & Geological Engineering (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

Inventia se refera la un procedeu de reducere a continutului de Cr la puterea 6+ solubil în apa din ciment, prin adaugare în timpul macinarii ingredientelor a 10-100 kg/t, ciment ferogips, ce cuprinde un amestec de sulfat de calciu dihidrat.
RO115758A 1983-01-20 1984-09-20 PROCEDEU DE REDUCERE A CONTINUTULUI DE CROM HEXAVALENT SOLUBIL îN APA, DIN CIMENT RO90804B (ro)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE8300283 1983-01-20

Publications (2)

Publication Number Publication Date
RO90804A RO90804A (ro) 1987-01-30
RO90804B true RO90804B (ro) 1987-01-31

Family

ID=20349686

Family Applications (1)

Application Number Title Priority Date Filing Date
RO115758A RO90804B (ro) 1983-01-20 1984-09-20 PROCEDEU DE REDUCERE A CONTINUTULUI DE CROM HEXAVALENT SOLUBIL îN APA, DIN CIMENT

Country Status (10)

Country Link
EP (1) EP0133434A1 (ro)
KR (1) KR840007392A (ro)
AU (1) AU2434284A (ro)
DD (1) DD217503A5 (ro)
GR (1) GR79711B (ro)
IT (1) IT1173095B (ro)
PL (1) PL245835A1 (ro)
RO (1) RO90804B (ro)
WO (1) WO1984002900A1 (ro)
YU (1) YU9684A (ro)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4321077A1 (de) 1993-06-24 1995-01-05 Dyckerhoff Ag Verfahren zur Depression der Allergien verursachenden Wirkung von wasserlöslichem Cr·V··I· in Zementen und/oder zementhaltigen Zubereitungen
SK282086B6 (sk) 1999-10-12 2001-10-08 Pova�Sk� Cement�Re�, A. S. Spôsob výroby cementu so zníženým obsahom chrómu
EP1440954B1 (de) * 2003-01-25 2005-04-27 Alexander Kehrmann Chromatreduziertes hydraulisches Bindemittel
DE10332530A1 (de) † 2003-07-17 2005-02-10 Kerr-Mcgee Pigments Gmbh Verfahren zur Reduktion des löslichen Chromatgehaltes in Zement sowie eine Zubereitung aus Zement und wasserlöslichen Metallsulfaten
JP4712719B2 (ja) * 2003-11-21 2011-06-29 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 硫酸塩分散クロム酸塩還元剤
ES2266711T5 (es) * 2003-12-12 2016-07-14 Alexander Kehrmann Aglutinante hidráulico
JP2007520416A (ja) * 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 相互粉砕セメントに対する液体添加物
CZ300050B6 (cs) * 2005-09-30 2009-01-21 Peringer@František Zpusob úpravy manipulacních vlastností heptahydratovaného síranu železnatého, zejména snížení jeho hygroskopických vlastností
ES2316283B1 (es) * 2007-05-31 2010-02-05 Fertisac, S.L. Procedimiento de fabricacion de sulfato ferroso granulado como aditivo para cementeras.
US8076175B2 (en) 2008-02-25 2011-12-13 Suniva, Inc. Method for making solar cell having crystalline silicon P-N homojunction and amorphous silicon heterojunctions for surface passivation
US7717999B1 (en) 2008-12-24 2010-05-18 The National Titanium Dioxide, Co., Ltd. (Cristal) Titanium production waste byproduct as partial cement replacement
CN111099849A (zh) * 2019-12-26 2020-05-05 安徽迪诺环保新材料科技有限公司 一种钛石膏建筑水泥砂浆及其制备方法
CN111807749B (zh) * 2020-06-11 2022-04-12 内蒙古同佳技术发展有限公司 一种六价铬还原剂及其制备方法
CN113060948A (zh) * 2021-04-01 2021-07-02 重庆康尼睿能商贸有限公司 一种水泥生料及水泥的制备方法
CN113072318B (zh) * 2021-04-25 2023-04-07 湖北新洋丰新型建材科技有限公司 一种球状磷石膏及其制备方法和应用

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2307270A (en) * 1940-08-04 1943-01-05 Mellon Inst Of Ind Res Building material
US3425892A (en) * 1965-10-22 1969-02-04 Grace W R & Co Cement set retarder
IS1443B6 (is) * 1980-12-17 1990-12-14 Aalborg Portland A/S thurr sementsblanda
JPS59501825A (ja) * 1982-11-17 1984-11-01 アクテイ−ゼルスカベツト　アアルボルグ　ポ−トランド−セメント−フアブリク 紛末特性の改良方法

Also Published As

Publication number Publication date
YU9684A (en) 1986-08-31
IT1173095B (it) 1987-06-18
KR840007392A (ko) 1984-12-07
WO1984002900A1 (en) 1984-08-02
IT8419258A0 (it) 1984-01-20
AU2434284A (en) 1984-08-15
EP0133434A1 (en) 1985-02-27
DD217503A5 (de) 1985-01-16
PL245835A1 (en) 1985-01-30
RO90804A (ro) 1987-01-30
GR79711B (ro) 1984-10-31

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