EP1390318A1 - Compositions a base de ciment impermeable et procede de fabrication associe - Google Patents

Compositions a base de ciment impermeable et procede de fabrication associe

Info

Publication number
EP1390318A1
EP1390318A1 EP02724306A EP02724306A EP1390318A1 EP 1390318 A1 EP1390318 A1 EP 1390318A1 EP 02724306 A EP02724306 A EP 02724306A EP 02724306 A EP02724306 A EP 02724306A EP 1390318 A1 EP1390318 A1 EP 1390318A1
Authority
EP
European Patent Office
Prior art keywords
weight
group
general formula
carbon atoms
emulsion
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Withdrawn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
EP02724306A
Other languages
German (de)
English (en)
Inventor
Michael Langdon
Rowland Arthur Jones
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.)
Construction Research and Technology GmbH
Original Assignee
Construction Research and Technology GmbH
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 Construction Research and Technology GmbH filed Critical Construction Research and Technology GmbH
Publication of EP1390318A1 publication Critical patent/EP1390318A1/fr
Withdrawn legal-status Critical Current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
    • C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
    • C04B24/40—Compounds containing silicon, titanium or zirconium or other organo-metallic compounds; Organo-clays; Organo-inorganic complexes
    • C04B24/42—Organo-silicon compounds
    • 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

Definitions

  • This invention relates to the waterproofing of porous cementitious materials and to admixtures for waterproofing.
  • cementitious materials such as cement and concrete and various artificial building stones based on these are frequently made into walls, floors, roofs and the like, where they will be exposed to water. As such materials are always inherently porous, water can penetrate them. Although appropriate formulation can do much to reduce this inherent porosity, it can never completely get rid of it. There is therefore a substantial industry that seeks to provide waterproofing to such cementitious surfaces.
  • the internal methods involved adding a waterproofing substance to a fluid cementitious mix before hardening.
  • the materials that have been most commercially successful in this regard have been known water-repellent, fatty acid-based materials, typically stearates and oleates. However, relatively large quantities of such materials are needed.
  • the external treatments have involved coating the surface of the hardened cementitious material with a waterproofing substance.
  • a waterproofing substance contain materials that are highly water repellent and are of low viscosity, to allow them to penetrate into the cementitious material.
  • Particularly successful types of waterproofing materials are those based on organosilicon materials. Aqueous emulsions are most frequently encountered, but solvent- based preparations and even organosilicon materials that are inherently sufficiently fluid have also been used. Multiple applications are needed for best effect, and the cost of applying such treatment to large structures can be very high.
  • organosilicon materials as admixtures to cementitious mixes, in an attempt to utilise the good waterproofing properties of the surface- applied materials to the convenience of use of the stearates and oleates.
  • the materials used have been aqueous hydroly sable silane emulsions.
  • the invention therefore provides a method of conferring water impermeability on a hardened cementitious composition which is formed from a fluid cementitious mix, by the addition to the mix of an aqueous emulsion of organosilicon material, which material comprises from 0.25-4.5% by weight of the emulsion of an alkoxysilane and from 0.1-2.0% of an alkoxysiloxane.
  • the invention also provides a waterproof hardened cementitious composition comprising internally an alkoxysilane and an alkoxysiloxane, which had been added as an admixture to a cementitious mix from which the hardened composition was formed.
  • the emulsion is one that contains
  • R ⁇ is an alkyl group with 3 to 12 carbon atoms; and R 2 is a methyl or ethyl group;
  • R 3 is an alkyl group with 1 to 6 carbon atoms, a is 0.8 to 1.2 and b is 0.2 to 1.2;
  • some of the water may be replaced by from 0.001-0.5% by weight of an emulsifier, 0.001% by weight of filler with an effective surface area of at least 40M 2 /g.
  • the emulsion contains
  • R 1 is an alkyl group with 1 to 16 carbon atoms
  • R 2 is an alkyl group with 1 to 4 carbon atoms
  • R 2 has the meaning already given, and R 3 is an aminoalkyl group with 1 to 6 carbon atoms or a group of the general formula
  • n is a whole number from 1 to 5
  • the ratio of bl to b2 being such that more than 1 and up to 3 OR 2 groups of compound bl correspond to one SiOH group of compound b2,
  • materials suitable for preparing aqueous emulsions for use in this invention include products such as RHEOMIX® 790 ex Feb MBT. Such materials typically have solids contents of 30% or more and have to be diluted to make a composition for use in this invention.
  • the emulsions are added to a cementitious mix at a rate of from 0.1 - 2.0%, preferably from 0.5 - 1.5% by weight emulsion by weight of cement.
  • the hardened cementitious product containing the emulsion as admixture has a waterproofing performance that is noticeably superior to anything currently available.
  • a B C dosage (% by weight 1.8 NA 1.1 on cement) capillary 0.13 4.0 0.1 absorption (mg/mm 2 )
  • the stone according to the invention was superior to the stones which used stearate and sprayed siloxane.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Aftertreatments Of Artificial And Natural Stones (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Materials Applied To Surfaces To Minimize Adherence Of Mist Or Water (AREA)

Abstract

L'invention concerne un procédé permettant de conférer une imperméabilité à l'eau à une composition à base de ciment durcie, constituée à partir d'un mélange à base de ciment fluide. Ce procédé consiste à ajouter au mélange une émulsion aqueuse de matériau organosilicé comprenant entre 0,25 et 4,5 % en poids de l'émulsion d'un alcoxysilane et entre 0,1 et 2,0 % d'un alcoxysiloxane.
EP02724306A 2001-05-08 2002-05-03 Compositions a base de ciment impermeable et procede de fabrication associe Withdrawn EP1390318A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB0111145 2001-05-08
GBGB0111145.9A GB0111145D0 (en) 2001-05-08 2001-05-08 Admixture
PCT/EP2002/004940 WO2002090287A1 (fr) 2001-05-08 2002-05-03 Compositions a base de ciment impermeable et procede de fabrication associe

Publications (1)

Publication Number Publication Date
EP1390318A1 true EP1390318A1 (fr) 2004-02-25

Family

ID=9914166

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02724306A Withdrawn EP1390318A1 (fr) 2001-05-08 2002-05-03 Compositions a base de ciment impermeable et procede de fabrication associe

Country Status (7)

Country Link
EP (1) EP1390318A1 (fr)
GB (1) GB0111145D0 (fr)
IL (1) IL153588A (fr)
NO (1) NO20030070L (fr)
WO (1) WO2002090287A1 (fr)
YU (1) YU703A (fr)
ZA (1) ZA200300162B (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5498697B2 (ja) * 2005-07-15 2014-05-21 ダウ コーニング コーポレーション 疎水化鉱物及び充填剤物質
DE102008063965C5 (de) 2008-12-19 2019-02-21 Evonik Degussa Gmbh Hydrophobierte zementhaltige Zusammensetzungen
DE202008018525U1 (de) 2008-12-19 2016-02-01 Evonik Degussa Gmbh Hydrophobierte zementhaltige Zusammensetzungen

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0796826A1 (fr) * 1996-03-19 1997-09-24 Dow Corning Limited Procédé pour rendre hydrophobe le gypse
EP0819663A1 (fr) * 1996-07-17 1998-01-21 Dow Corning Limited Mélange de gypse contenant un additive hydrophobe et procédé pour rendre hydrophobe le gypse
WO2002000570A1 (fr) * 2000-06-27 2002-01-03 Mbt Holding Ag Traitement de substrats mineraux

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0570203A (ja) * 1991-09-10 1993-03-23 Shin Etsu Chem Co Ltd アルコキシシラン類含有押し出し成形用セメント組成物
JPH0742180B2 (ja) * 1991-12-20 1995-05-10 東洋インキ製造株式会社 水性有機珪素系組成物
US5702509A (en) * 1995-12-22 1997-12-30 Minnesota Mining And Manufacturing Company Masonry treatment composition

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0796826A1 (fr) * 1996-03-19 1997-09-24 Dow Corning Limited Procédé pour rendre hydrophobe le gypse
EP0819663A1 (fr) * 1996-07-17 1998-01-21 Dow Corning Limited Mélange de gypse contenant un additive hydrophobe et procédé pour rendre hydrophobe le gypse
WO2002000570A1 (fr) * 2000-06-27 2002-01-03 Mbt Holding Ag Traitement de substrats mineraux

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO02090287A1 *

Also Published As

Publication number Publication date
WO2002090287A1 (fr) 2002-11-14
IL153588A0 (en) 2003-07-06
NO20030070L (no) 2003-03-10
ZA200300162B (en) 2004-03-10
GB0111145D0 (en) 2001-06-27
NO20030070D0 (no) 2003-01-07
IL153588A (en) 2009-09-22
YU703A (sh) 2005-11-28

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