EP2364281A4 - ADDITIVES FOR Cr (VI) REDUCTION IN CEMENT, SLAGS, MORTARS, CONCRETE, WASTE WATER AND MINING INDUSTRY WASTE - Google Patents

ADDITIVES FOR Cr (VI) REDUCTION IN CEMENT, SLAGS, MORTARS, CONCRETE, WASTE WATER AND MINING INDUSTRY WASTE

Info

Publication number
EP2364281A4
EP2364281A4 EP09827001.0A EP09827001A EP2364281A4 EP 2364281 A4 EP2364281 A4 EP 2364281A4 EP 09827001 A EP09827001 A EP 09827001A EP 2364281 A4 EP2364281 A4 EP 2364281A4
Authority
EP
European Patent Office
Prior art keywords
mortars
slags
cement
additives
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.)
Withdrawn
Application number
EP09827001.0A
Other languages
German (de)
French (fr)
Other versions
EP2364281A2 (en
Inventor
Jean-Bosco Kazirukanyo
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.)
AFRISAM (SOUTH AFRICA) Pty Ltd
AFRISAM SOUTH AFRICA Pty Ltd
Original Assignee
AFRISAM (SOUTH AFRICA) Pty Ltd
AFRISAM SOUTH AFRICA Pty 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 AFRISAM (SOUTH AFRICA) Pty Ltd, AFRISAM SOUTH AFRICA Pty Ltd filed Critical AFRISAM (SOUTH AFRICA) Pty Ltd
Publication of EP2364281A2 publication Critical patent/EP2364281A2/en
Publication of EP2364281A4 publication Critical patent/EP2364281A4/en
Withdrawn legal-status Critical Current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
    • C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
    • C04B40/0028—Aspects relating to the mixing step of the mortar preparation
    • C04B40/0039—Premixtures of ingredients
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/5272—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using specific organic precipitants
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/70—Treatment of water, waste water, or sewage by reduction
    • C02F1/705—Reduction by metals
    • 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
    • C04B5/00—Treatment of  metallurgical  slag ; Artificial stone from molten  metallurgical  slag 
    • C04B5/06—Ingredients, other than water, added to the molten slag or to the granulating medium or before remelting; Treatment with gases or gas generating compounds, e.g. to obtain porous slag
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/20—Heavy metals or heavy metal compounds
    • C02F2101/22—Chromium or chromium compounds, e.g. chromates
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/06—Contaminated groundwater or leachate
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/10—Nature of the water, waste water, sewage or sludge to be treated from quarries or from mining activities
    • 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)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Hydrology & Water Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Inorganic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Processing Of Solid Wastes (AREA)
EP09827001.0A 2008-11-11 2009-10-28 ADDITIVES FOR Cr (VI) REDUCTION IN CEMENT, SLAGS, MORTARS, CONCRETE, WASTE WATER AND MINING INDUSTRY WASTE Withdrawn EP2364281A4 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ZA200809602 2008-11-11
PCT/ZA2009/000094 WO2010057225A2 (en) 2008-11-11 2009-10-28 ADDITIVES FOR Cr (VI) REDUCTION IN CEMENT, SLAGS, MORTARS, CONCRETE, WASTE WATER AND MINING INDUSTRY WASTE

Publications (2)

Publication Number Publication Date
EP2364281A2 EP2364281A2 (en) 2011-09-14
EP2364281A4 true EP2364281A4 (en) 2015-12-23

Family

ID=42170813

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09827001.0A Withdrawn EP2364281A4 (en) 2008-11-11 2009-10-28 ADDITIVES FOR Cr (VI) REDUCTION IN CEMENT, SLAGS, MORTARS, CONCRETE, WASTE WATER AND MINING INDUSTRY WASTE

Country Status (2)

Country Link
EP (1) EP2364281A4 (en)
WO (1) WO2010057225A2 (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104496251B (en) * 2014-11-25 2017-03-22 中国建筑材料科学研究总院 Liquid hexavalent chromium reducing agent and preparation method thereof, cement and preparation method thereof
CN104876318B (en) * 2015-05-29 2017-06-13 华中师范大学 A kind of method for treating water of manganese dioxide/oxalic acid material reduction removal Cr VI
RU2641040C1 (en) * 2016-09-20 2018-01-15 Общество с ограниченной ответственностью "ПКФ" Plasticiser for ready-mixed concrete mixtures
CN107056124B (en) * 2017-01-24 2019-07-05 福州大学 A kind of preparation method of cement grinding aid
CN108355659A (en) * 2018-03-14 2018-08-03 兰州交通大学 A kind of metal carrier material and preparation method thereof based on the catalysis of iron aluminium
CN108911101B (en) * 2018-06-25 2021-06-04 华中师范大学 Method for efficiently removing heavy metal ions based on ball milling oxalic acid zero-valent iron
CN109384299B (en) * 2018-08-10 2022-02-01 华中师范大学 Method for removing hexavalent chromium in water body by using sodium oxalate modified zero-valent iron
CN112456831B (en) * 2020-10-13 2023-10-03 唐山冀东水泥外加剂有限责任公司 High-temperature-resistant cement hexavalent chromium reducing agent
CN114163163B (en) * 2021-12-22 2022-11-29 湖南润攸科技发展有限公司 Concrete chromium reducing agent

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1229434B (en) * 1960-09-27 1966-11-24 Mobil Oil Corp Sulphate-calcium aluminate cement
DE1232861B (en) * 1964-08-24 1967-01-19 Grace W R & Co Non-corrosive setting accelerator for hydraulic cement
US3429724A (en) * 1965-10-21 1969-02-25 Grace W R & Co Cement set retarding composition
EP0070482A2 (en) * 1981-07-20 1983-01-26 Sika AG, vorm. Kaspar Winkler & Co. Process for corrosion-protection of reinforcing iron elements or tension cables in building parts
US4424074A (en) * 1982-08-24 1984-01-03 Diamond Shamrock Corporation Additives for cementitious compositions
JPH06183800A (en) * 1992-12-14 1994-07-05 Denki Kagaku Kogyo Kk Chlorine ion capturing material
US5380441A (en) * 1993-09-15 1995-01-10 General Electric Company Removal of chromium from solution using mechanically agitated iron particles
JPH10236856A (en) * 1997-02-26 1998-09-08 Nippon Solid Co Ltd Cement additive composition, and cement solidifying method using the cement additive composition
WO1999057076A1 (en) * 1998-05-01 1999-11-11 Mbt Holding Ag Integrated retroreflective marking materials
DE20311049U1 (en) * 2003-07-17 2003-09-18 Ferro Duo GmbH, 47053 Duisburg Hydraulic binder

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3819051A (en) * 1972-08-31 1974-06-25 Amchem Prod Process for treating wastes containing chromates and/or complex iron cyanides
US4268486A (en) * 1979-07-02 1981-05-19 Olin Corporation Selective chromate removal from a chlorate solution
KR20080044246A (en) * 2005-08-12 2008-05-20 더블유.알. 그레이스 앤드 캄파니-콘. Dosage efficient, storage stable compositions for reducing chromium(vi) in cement
ES2284371B2 (en) * 2006-01-27 2009-07-02 Sociedad Anonima Tudela Veguin AN ADDITIVE PRODUCT FOR CHROME REDUCTION (VI) IN THE CEMENTS.
PL1886979T3 (en) * 2006-08-11 2013-02-28 Gcp Applied Tech Inc Coordinated Metal Compounds for reducing chromium

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1229434B (en) * 1960-09-27 1966-11-24 Mobil Oil Corp Sulphate-calcium aluminate cement
DE1232861B (en) * 1964-08-24 1967-01-19 Grace W R & Co Non-corrosive setting accelerator for hydraulic cement
US3429724A (en) * 1965-10-21 1969-02-25 Grace W R & Co Cement set retarding composition
EP0070482A2 (en) * 1981-07-20 1983-01-26 Sika AG, vorm. Kaspar Winkler & Co. Process for corrosion-protection of reinforcing iron elements or tension cables in building parts
US4424074A (en) * 1982-08-24 1984-01-03 Diamond Shamrock Corporation Additives for cementitious compositions
JPH06183800A (en) * 1992-12-14 1994-07-05 Denki Kagaku Kogyo Kk Chlorine ion capturing material
US5380441A (en) * 1993-09-15 1995-01-10 General Electric Company Removal of chromium from solution using mechanically agitated iron particles
JPH10236856A (en) * 1997-02-26 1998-09-08 Nippon Solid Co Ltd Cement additive composition, and cement solidifying method using the cement additive composition
WO1999057076A1 (en) * 1998-05-01 1999-11-11 Mbt Holding Ag Integrated retroreflective marking materials
DE20311049U1 (en) * 2003-07-17 2003-09-18 Ferro Duo GmbH, 47053 Duisburg Hydraulic binder

Also Published As

Publication number Publication date
EP2364281A2 (en) 2011-09-14
WO2010057225A3 (en) 2011-04-21
WO2010057225A2 (en) 2010-05-20

Similar Documents

Publication Publication Date Title
EP2364281A4 (en) ADDITIVES FOR Cr (VI) REDUCTION IN CEMENT, SLAGS, MORTARS, CONCRETE, WASTE WATER AND MINING INDUSTRY WASTE
HRP20181852T1 (en) Portland limestone calcined clay cement
EG25870A (en) Low cement concrete
ZA201104428B (en) Hydraulic binder based on sulfoaluminous clinker and on portland clinker
AP2940A (en) High strength cement, mortar and concrete including industrial by-products
HRP20120875T4 (en) Additives and methods for reducing hexavalent chromium in cement
EP2086754A4 (en) Method for wet mixing cementitious slurry for fiber-reinforced structural cement panels
GB2451792B (en) A method for continuously batch mixing a cement slurry
EP2086735A4 (en) Apparatus and method for wet mixing cementitious slurry for fiber-reinforced structural cement panels
PL2562149T3 (en) Concrete with low clinker content
EP2246315A4 (en) Cement admixture, and cement composition and concrete containing the cement admixture
GB2445285B (en) Rheology modifier for cement slurries
PL2516344T3 (en) Superplasticizers for concrete and cement materials and process for producing the same
BRPI0817617A2 (en) Method for the production of portland slag cement and blast furnace portland cement
EP2418185A4 (en) Crack-resistant admixture for cement mortar, and cement mortar comprising same
EG26666A (en) Cement composition for self-levelling concrete
FR2942223B1 (en) RAPID HYDRAULIC BINDER FOR CONCRETE PARTS AND WORKS CONTAINING CALCIUM SALT
GB0711798D0 (en) Improvements to concrete blocks and block laying
PL2066595T3 (en) Binder comprising portland cement and lime hydrate
PT2401238E (en) Composition used for preparing concrete without adding water
EP1976807A4 (en) Compounds and methods for reducing water content in cementitious mixtures
UA34906U (en) Building mortar
GB0908213D0 (en) Concrete batching system and method
UA51965U (en) Concrete for marine structures
HU0800619D0 (en) Technological procedure for with admixture for increasing the water-tightning of cement, cementous concrete and mortar

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20110510

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR

AX Request for extension of the european patent

Extension state: AL BA RS

A4 Supplementary search report drawn up and despatched

Effective date: 20151119

RIC1 Information provided on ipc code assigned before grant

Ipc: C04B 22/04 20060101AFI20151113BHEP

Ipc: C02F 1/70 20060101ALI20151113BHEP

Ipc: C04B 22/08 20060101ALI20151113BHEP

Ipc: C04B 24/04 20060101ALI20151113BHEP

Ipc: C04B 22/06 20060101ALI20151113BHEP

Ipc: C04B 5/06 20060101ALI20151113BHEP

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20160621