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WO1988001609A1 - Emploi de phosphonates d'alkyle substitues dans des melanges de beton et de mortier, bouillies de ciment ainsi que peintures au latex - Google Patents

Emploi de phosphonates d'alkyle substitues dans des melanges de beton et de mortier, bouillies de ciment ainsi que peintures au latex Download PDF

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Publication number
WO1988001609A1
WO1988001609A1 PCT/EP1987/000449 EP8700449W WO8801609A1 WO 1988001609 A1 WO1988001609 A1 WO 1988001609A1 EP 8700449 W EP8700449 W EP 8700449W WO 8801609 A1 WO8801609 A1 WO 8801609A1
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WO
WIPO (PCT)
Prior art keywords
concrete
substituted alkyl
cement
alkyl phosphonates
weight
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.)
Ceased
Application number
PCT/EP1987/000449
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German (de)
English (en)
Inventor
Eberhard Christ
Uwe Schubert
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Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of WO1988001609A1 publication Critical patent/WO1988001609A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
    • C04B41/46—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 organic 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
    • C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
    • C04B24/003—Phosphorus-containing compounds
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
    • C07F9/00—Compounds containing elements of Groups 5 or 15 of the Periodic Table
    • C07F9/02—Phosphorus compounds
    • C07F9/28—Phosphorus compounds with one or more P—C bonds
    • C07F9/38—Phosphonic acids [RP(=O)(OH)2]; Thiophosphonic acids ; [RP(=X1)(X2H)2(X1, X2 are each independently O, S or Se)]
    • C07F9/3804—Phosphonic acids [RP(=O)(OH)2]; Thiophosphonic acids ; [RP(=X1)(X2H)2(X1, X2 are each independently O, S or Se)] not used, see subgroups
    • C07F9/3808—Acyclic saturated acids which can have further substituents on alkyl
    • 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
    • C04B2111/22—Carbonation resistance

Definitions

  • the invention relates to the use of substituted alkyl phosphonates in concrete and mortar mixtures, slurries (cement paste) and emulsion paints to reduce the diffusion of carbon dioxide in concrete parts and to increase the compressive strength of concrete parts.
  • the hydration of the di- and tricalcium silicates, which deliver the lower-calc, fibrous calcium silicate hydrate, is primarily responsible for the strength development of a Portland cement.
  • calcium hydroxide is released, which initially only plays a subordinate role for the strength of the concrete.
  • the calcium hydroxide absorbs carbon dioxide from the outside to form calcium carbonate. This natural hardening process, which progresses from the outside inwards, takes decades or centuries with thick masonry or strong concrete parts, which results in the extraordinary strength of old buildings.
  • the reinforcement steels laid in the concrete have lost all or part of their corrosion protection in the form of the alkaline environment initially present.
  • the corrosion on the surface of the reinforcement steels which initially appears as discoloration of the Exposing exposed concrete and the associated volume expansion of the corrosion products loosen the concrete ceiling, as a result of which all or part of the rusted reinforcing steel is exposed and the original surface profile of the component is disturbed.
  • DE-PS 23 48 081 describes the use of sparingly soluble barium silicate hydrates as an additive to concrete and mortar mixtures which contain gypsum, gypsum stone or anhydride in order to bind sulfate ions and to slow the carbonation.
  • the object of the present invention is to provide additives for concrete and mortar mixtures, slurries and for emulsion paints, which not only reduce the diffusion of carbon dioxide in concrete parts and thus have a retarding influence on the carbonation in concrete parts, so that they are able to protect the underlying reinforcing steel from corrosion, but also, if possible, the mechanical properties improve the above-mentioned mixtures, in particular increase the compressive strength of the finished concrete parts.
  • the solution to this problem is the use of at least one substituted alkylphosphonate or a mixture of substituted alkylphosphonates in concrete and mortar mixtures and slurries in quantities of 0.001 to 1.0% by weight, based on the weight fraction of cement, and in emulsion paints in quantities from 0.1 to 0.32% by weight, based on the solids content of the dispersion.
  • substituted alkylphosphonates and their free acids are known, for example, as sequestering agents, such as l-hydroxyethane-l, l-diphosphonic acid (R ⁇ mpp, Chemische lexicon, 8th edition, p. 1804), and as surfactants in detergents (see for example EP- A-26529).
  • sequestering agents such as l-hydroxyethane-l, l-diphosphonic acid (R ⁇ mpp, Chemische lexicon, 8th edition, p. 1804)
  • surfactants in detergents see for example EP- A-26529.
  • the substituted alkylphosphonates when used, in addition to the use of their surfactant properties which cause the cement-old mixtures to liquefy, in particular a delay or reduction in the carbon dioxide diffusion in concrete parts is caused (delay in carbonation).
  • the cement-containing mixtures when the cement-containing mixtures are hardened, the compressive strength and bending tensile strength and the acid resistance of the hardened parts are increased if the substituted alkylphosphonates are used in concrete and mortar mixtures and slurries.
  • plasticizers of the prior art normally have to be added in amounts of not less than 2% by weight, based on the proportion of cement.
  • DE-PS 27 55 551 describes the use of 2,2,2-tris (hydroxymethyl) ethylphosphonic acid to retard the setting or hardening of cement.
  • the aqueous solution of the phosphonic acid is added in a concentration of 0.75% to the cement mixture without reference.
  • DE-AS 1 154 028 relates to a process for the liquefaction of inorganic sludges to which salts of acylation products of phosphorous acid are added.
  • WO 85/01043 includes the use of substituted phosphonates for retarding the setting of cement stillages, while EP-Al 0 166 798 describes a delaying additive for cement mixtures.
  • At least one is used in concrete and mortar mixtures and stillage to reduce the diffusion of carbon dioxide in concrete parts from 0.001 to 1.0% by weight, preferably 0.01 to 0.5% by weight, based on cement
  • the same amounts of the substituted alkylphosphonates used according to the invention are used, i. H.
  • a total of 0.001 to 1.0% by weight, preferably 0.01 to 0.5% by weight, based on the cement of at least one substituted alkyl phosphonate or a mixture of substituted alkyl phosphonates in addition to reducing the diffusion an increase in the compressive strength of the concrete parts of the carbon dioxide can also be observed.
  • the sodium salt of diethylene-triamine-pentamethylene-phosphonic acid is preferably used in the context of the present invention.
  • the substituted alkylphosphonic acids or the salts of these acids used according to the invention are able to largely seal the concrete against carbon dioxide which penetrates from the outside, or to bind carbon dioxide, in order to counteract a change in pH value by carbonation .
  • the reinforcement steels lying in the concrete are better protected against corrosion, since the carbonation process is significantly slowed down. An increase in the compressive strength of the concrete parts can also be observed.
  • crete and mortar mixtures in which the abovementioned substituted alkylphosphonates can be used in the amounts mentioned is to be understood in the broadest sense and includes in particular screed mortar, masonry mortar, stuffing mortar and others made of cement, sand, gravel, tress, Expanded clay, foam lava, pumice, foamed polystyrene, cork, polyurethane foam and other, organic or inorganic-chemical additives with the addition of water, hydraulically solidifying mixtures.
  • concrete and mortar mixtures can also contain a wide variety of concrete additives and mortar additives, such as can be found in the book "Additives, Paints, Auxiliaries for Concrete and Mortar” by Albrecht and Mannherz, Bauverlag GmbH, 1968, without claiming to be complete.
  • cement constituents of the cement-containing mixtures in particular the concrete and mortar mixtures, the following should preferably be mentioned: Portland cements, iron Portland cements, blast furnace cements, tress cements and puzzolements, to which known additives such as raw meal and / or fly ash are of course known can be added.
  • test specimens were produced starting from a standard mortar with Portland cement 35F according to DIN 1164 with a water-cement value of 0.5 and tested as follows:
  • the CO_ diffusion resistance numbers illustrate the excellent effect of the additives used according to the invention. Multiplying by the layer thickness gives the diffusion-equivalent air layer thickness, which offers sufficient protection against carbon dioxide at values above 50 m. A layer of concrete only 0.06 m thick (according to the example) is already able to exceed the required diffusion-equivalent air layer thickness of more than 50 m. Pretreatment of the exposed reinforcement steel with corrosion-inhibiting agents, such as red lead, is therefore no longer necessary according to the invention.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Molecular Biology (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

Emploi de phosphonates d'alkyle substitués connus en soi dans des mélanges de béton et de mortier, bouillies de ciment (pâte de ciment) ainsi que dans des peintures aqueuses au latex, et ce dans des quantités, comprises entre 0,001 et 1,0 % en poids, rapporté au ciment, dans les mélanges de béton et de mortier et les boues de ciment, ou entre 0,1 et 0,32 % en poids, rapporté à la teneur en substances solides de la dispersion, dans les peintures au latex, afin de réduire la diffusion du gaz carbonique dans les parties en béton et éventuellement d'accroître leur résistance à la compression.
PCT/EP1987/000449 1986-08-28 1987-08-15 Emploi de phosphonates d'alkyle substitues dans des melanges de beton et de mortier, bouillies de ciment ainsi que peintures au latex Ceased WO1988001609A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863629234 DE3629234C1 (de) 1986-08-28 1986-08-28 Verwendung von substituierten Alkylphosphonaten in Beton- und Moertelmischungen,Schlempen sowie Dispersionsfarben
DEP3629234.6 1986-08-28

Publications (1)

Publication Number Publication Date
WO1988001609A1 true WO1988001609A1 (fr) 1988-03-10

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1987/000449 Ceased WO1988001609A1 (fr) 1986-08-28 1987-08-15 Emploi de phosphonates d'alkyle substitues dans des melanges de beton et de mortier, bouillies de ciment ainsi que peintures au latex

Country Status (3)

Country Link
AU (1) AU7851887A (fr)
DE (1) DE3629234C1 (fr)
WO (1) WO1988001609A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7686884B2 (en) 2003-05-05 2010-03-30 Sika Technology Ag Use of phosphorus-oxygen acid esters containing alkoxy groups as corrosion inhibitors for reinforced concrete
EP4428139A1 (fr) 2023-03-08 2024-09-11 Giovanni Bozzetto S.p.A. Derives de phosphonate de polyaminomethylene a faible teneur en phosphore et a proprietes sequestrantes et dispersantes, utilisations et procedes associes pour leur preparation

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3232998A1 (de) * 1982-09-04 1984-03-08 Henkel KGaA, 4000 Düsseldorf Diphosphonsaeuren

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1154028B (de) * 1960-01-23 1963-09-05 Henkel & Cie Gmbh Verfahren zur Verfluessigung von anorganischen Schlaemmen
US3794506A (en) * 1972-10-02 1974-02-26 Dow Chemical Co Cementitious compositions containing phosphonic acid
US4089893A (en) * 1976-12-13 1978-05-16 Borg-Warner Corporation 2,2,2-Tris(hydroxymethyl)ethylphosponic acid and method for its preparation
US4466836A (en) * 1983-04-28 1984-08-21 The Dow Chemical Company Set retarding compounds for use in cement slurries
US4472200A (en) * 1983-09-02 1984-09-18 The Dow Chemical Company New additives for retarding setting of cement from methylenephosphonated aminohydrocarbylpiperazine-urea adducts

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3232998A1 (de) * 1982-09-04 1984-03-08 Henkel KGaA, 4000 Düsseldorf Diphosphonsaeuren

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
CHEMICAL ABSTRACTS, Band 95, Nr. 1, Juli 1981, (Columbus, Ohio, US), G.D. DIBROV et al.: "Effect of a Triethanolamine Salt of Alkyl Phosphates on the Durability of Concrete", siehe seite 280, Zusammenfassung 11567c, & Izv. Sev.-Kauk. Nauchn. Tsentra Vyssh. Shk., Tekh. Nauki 1980, (3), 77-9 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7686884B2 (en) 2003-05-05 2010-03-30 Sika Technology Ag Use of phosphorus-oxygen acid esters containing alkoxy groups as corrosion inhibitors for reinforced concrete
EP4428139A1 (fr) 2023-03-08 2024-09-11 Giovanni Bozzetto S.p.A. Derives de phosphonate de polyaminomethylene a faible teneur en phosphore et a proprietes sequestrantes et dispersantes, utilisations et procedes associes pour leur preparation
EP4428140A1 (fr) 2023-03-08 2024-09-11 Giovanni Bozzetto S.p.A. Derives de phosphonate de polyaminomethylene a faible teneur en phosphore et a proprietes sequestrantes et dispersantes, utilisations et procedes associes pour leur preparation

Also Published As

Publication number Publication date
AU7851887A (en) 1988-03-24
DE3629234C1 (de) 1987-10-01

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