EP1713744A1 - Accelerateur de solidification et de rigidification a base d'eau destine a des liants hydrauliques et procede de fabrication - Google Patents

Accelerateur de solidification et de rigidification a base d'eau destine a des liants hydrauliques et procede de fabrication

Info

Publication number
EP1713744A1
EP1713744A1 EP05707950A EP05707950A EP1713744A1 EP 1713744 A1 EP1713744 A1 EP 1713744A1 EP 05707950 A EP05707950 A EP 05707950A EP 05707950 A EP05707950 A EP 05707950A EP 1713744 A1 EP1713744 A1 EP 1713744A1
Authority
EP
European Patent Office
Prior art keywords
hardening accelerator
water
aluminum
accelerator according
solidification
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Withdrawn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
EP05707950A
Other languages
German (de)
English (en)
Inventor
Benedikt Lindlar
Franz Wombacher
Heinz Schürch
Urs Mäder
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.)
Sika Technology AG
Original Assignee
Sika Technology AG
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 Sika Technology AG filed Critical Sika Technology AG
Priority to EP05707950A priority Critical patent/EP1713744A1/fr
Publication of EP1713744A1 publication Critical patent/EP1713744A1/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Withdrawn legal-status Critical Current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
    • 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
    • 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
    • C04B2103/10—Accelerators; Activators
    • 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
    • C04B2111/00034—Physico-chemical characteristics of the mixtures
    • C04B2111/00146—Sprayable or pumpable mixtures
    • C04B2111/00155—Sprayable, i.e. concrete-like, materials able to be shaped by spraying instead of by casting, e.g. gunite
    • 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
    • C04B2111/1025—Alkali-free or very low alkali-content materials

Definitions

  • the invention is based on a setting and hardening accelerator for hydraulic binders according to the preamble of the first claim.
  • the invention is also based on a method for producing a setting and hardening accelerator for hydraulic binders according to the preamble of the independent method claim.
  • the mixture containing the binder mentioned is added from 0.5 to 10% by weight, based on the weight of this binder , an alkali-free setting and hardening accelerator, which accelerator contains aluminum hydroxide.
  • an alkali-free setting and hardening accelerator which accelerator contains aluminum hydroxide.
  • Solidification and hardening accelerators in dissolved form for hydraulic binders are known from EP 0 946451 B1, which can be more easily admixed to the concrete when the concrete is sprayed.
  • Such a solidification and hardening accelerator consists among other things of aluminum hydroxide, aluminum salts and organic carboxylic acids.
  • Such known accelerators contain a relatively large amount of aluminum salts and amorphous aluminum hydroxide is required for the production, which is very expensive. To enable the production of such accelerators, the water must be heated to approx. 60 - 70 ° C for the reaction. Further disadvantages of such solidification and hardening accelerators are also a relatively low early strength in the first hours and days and the insufficient stability of the solution.
  • the invention is based on the object in the case of a water-based setting and hardening accelerator for hydraulic binders to achieve the highest possible strength with the longest possible stability of the accelerator.
  • the advantages of the invention can be seen, inter alia, in the fact that the accelerators according to the invention provide high stability, i.e. Stabilization of the accelerator solution is achieved and that high strengths are achieved in the first hours and days.
  • Water-based setting and hardening accelerators for hydraulic binders according to the invention can be produced in various ways, a molar ratio of aluminum to organic acid being less than 0.65.
  • Water-based accelerator refers to an accelerator that can appear as a solution, with partially finely dispersed particles or as a dispersion.
  • Such a water-based setting and hardening accelerator according to the invention advantageously comprises (in% by weight): 14.4 to 24.9% sulfate,
  • Al 2 O 3 is preferably chosen to be less than 14%, particularly preferably less than 13% and in particular less than 12% Al 2 O 3 .
  • the aforementioned substances can advantageously be found as ions in solution, but can also occur in complex form or undissolved in the accelerator. This is particularly the case if the accelerator occurs as a solution with partially finely dispersed particles or as a dispersion.
  • a water-based solidification and hardening accelerator for hydraulic binders according to the invention can be produced, for example, from Al 2 (SO 4 ) 3 aluminum sulfate, Al (OH) 3 aluminum hydroxide and organic acid in aqueous solution, a molar ratio of aluminum to organic acid being less than 0.65.
  • An aluminum sulfate with approximately 17% Al 2 O 3 is preferably used, but other contents can also be used, in which case the amounts to be added must then be adjusted accordingly.
  • the aluminum sulfate can also be produced by a reaction of aluminum hydroxide with sulfuric acid in the production of the accelerator, with sulfate ions correspondingly forming in the aqueous solution.
  • aluminum sulfate can be produced by reacting a basic aluminum compound with sulfuric acid.
  • Amorphous aluminum hydroxide is advantageously used as the aluminum hydroxide.
  • the aluminum hydroxide can also be used in the form of aluminum hydroxide carbonate, aluminum hydroxysulfate or the like.
  • a carboxylic acid particularly preferably a formic acid, is preferably used as the organic acid, but other organic acids having the same effect, such as, for example, acetic acid, can also be used. In general, however, all mono- or polyprotonic carboxylic acids can be used.
  • magnesium hydroxide Mg (OH) 2 is preferably used as the alkaline earth hydroxide.
  • Diethanolamine DEA is advantageously used as the alkanolamine.
  • Polycarboxylates and particularly advantageously Sika ViscoCrete® are advantageously used as flow agents.
  • Silicasol is advantageously used as a stabilizer.
  • the following are essentially used (in% by weight): - 30 - 50% Al 2 (S ⁇ 4) 3 aluminum sulfate, preferably 35 - 45%, in particular 35 - 38%, and / or
  • Al (OH) 3 aluminum hydroxide in particular 7 - 15%, and / or
  • a molar ratio of aluminum to organic acid being less than 0.65, preferably less than 0.60, particularly preferably less than 0.55 and in particular less than 0.50.
  • the molar ratio of aluminum to organic acid is preferably in a range from 0.38 to 0.65, particularly preferably in a range from 0.38 to 0.60, in particular between 0.50 and 0.60. Below a value of 0.38, the pH value becomes relatively low and a very high proportion of acid must be used, and in some cases stability is no longer guaranteed.
  • both the amount of aluminum sulfate used in the production and, in particular, the aluminum hydroxide is reduced by up to 10% and 38%, respectively.
  • Up to 10% magnesium hydroxide and / or a corresponding amount of magnesium oxide are preferably used in the production of the accelerator.
  • the pure amount of Mg, based on the total amount of accelerator, is 0 to 4.2%, preferably 0.8 to 2.9%, particularly preferably 1.3 to 2.1%.
  • the ratio of aluminum to organic acid is adjusted to a value of less than 0.65, preferably less than 0.60, by the increased organic acid content compared to known accelerators, and the pH is adjusted to pH 3-4 by up to 5% alkanolamine.
  • the sulfate resistance is promoted by the amount of aluminum used in the production, which is reduced by up to 25%. This is an advantage over conventional accelerators, in which the accelerator drastically deteriorates the sulfate resistance.
  • the reduction in the sulfate resistance due to aluminum input is caused in particular by the fact that the aluminate phases have a special affinity for sulfate.
  • the additional aluminum increases the proportion of aluminate phases in the concrete, which then cause a not insignificant crystallization pressure by ettringite formation on the hardened concrete when exposed to external sulfate and thus lead to damage.
  • the aluminum content stated as Al 2 O 3 is therefore preferably less than 14%, more preferably less than 13% and in particular less than 12% Al 2 O 3 .
  • magnesium hydroxide and / or oxide is used in the production of the accelerator, the strong reaction of the magnesium hydroxide and / or oxide with the organic acid increases the temperature of the mixture so much that the water does not have to be heated for these batches. The other components are then added to this heated mixture. The components can also be added in any other order. This simplifies the process and less energy is required.
  • An additional advantage of using magnesium is the significantly higher storage stability of the accelerators caused by the magnesium ions. Good storage stability is achieved even with a content of 1% by weight of magnesium hydroxide during manufacture. At higher levels, the shelf life is at least four months. By using magnesium hydride and / or oxide, the accelerator can also be manufactured significantly cheaper, since expensive aluminum hydroxide can be replaced.
  • the stability of the accelerators is positively influenced by the reduced amount of aluminum.
  • the reduced amount of aluminum also increases the sulfate resistance.
  • the development of the compressive strength of the shotcrete in the first hours and days is also influenced very positively and is better than with conventionally used accelerators.
  • Table 2 shows the molar ratios of aluminum to sulfate and from aluminum to organic acid, here formic acid, of the samples measured.
  • the molar ratio of aluminum to organic acid is below 0.67, preferably below 0.60.
  • the aluminum content of the various examples is also given.
  • Molar ratios Hydraulic binders can be added 0.1 to 10 wt .-% of the accelerator according to the invention.
  • 6% of the accelerator based on the content of the hydraulic binder, was added to a conventional concrete mixture for use as shotcrete.
  • Portland cement was used as the hydraulic binder.
  • the admixture took place in the area of the spray nozzle when processing the shotcrete.
  • the strength of the sprayed concrete was determined. For this purpose, cores measuring 5x5 cm are removed. The compressive strength of the drill cores is then determined using a hydraulic press.
  • Example A5 also shows a relatively high strength after one day, but with significantly higher aluminum contents than the examples A6 to A8. Versions according to Examples A4 and A6 to A7 are therefore particularly preferred, since the lower Al content also improves the sulfate resistance.
  • the accelerators according to the invention can also be used for hydraulic binders other than cement such as mixed cements, lime, hydraulic lime and gypsum and mortar and concrete made therefrom.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
  • Adhesives Or Adhesive Processes (AREA)

Abstract

L'invention concerne un accélérateur de solidification et de rigidification à base d'eau destiné à des liants hydrauliques, contenant du sulfate, de l'aluminium et un acide organique, le rapport molaire de l'aluminium sur l'acide organique étant inférieur à 0,65. Le rapport molaire de l'aluminium sur l'acide carboxylique est de préférence inférieur à 0,60 et supérieur 0,38.
EP05707950A 2004-02-06 2005-02-04 Accelerateur de solidification et de rigidification a base d'eau destine a des liants hydrauliques et procede de fabrication Withdrawn EP1713744A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP05707950A EP1713744A1 (fr) 2004-02-06 2005-02-04 Accelerateur de solidification et de rigidification a base d'eau destine a des liants hydrauliques et procede de fabrication

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP04002676 2004-02-06
EP05707950A EP1713744A1 (fr) 2004-02-06 2005-02-04 Accelerateur de solidification et de rigidification a base d'eau destine a des liants hydrauliques et procede de fabrication
PCT/EP2005/050497 WO2005075381A1 (fr) 2004-02-06 2005-02-04 Accelerateur de solidification et de rigidification a base d'eau destine a des liants hydrauliques et procede de fabrication

Publications (1)

Publication Number Publication Date
EP1713744A1 true EP1713744A1 (fr) 2006-10-25

Family

ID=34673682

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05707950A Withdrawn EP1713744A1 (fr) 2004-02-06 2005-02-04 Accelerateur de solidification et de rigidification a base d'eau destine a des liants hydrauliques et procede de fabrication

Country Status (5)

Country Link
US (2) US20100071595A1 (fr)
EP (1) EP1713744A1 (fr)
JP (2) JP2007520413A (fr)
NO (1) NO20063950L (fr)
WO (1) WO2005075381A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2248780A1 (fr) 2009-05-06 2010-11-10 BK Giulini GmbH Accélérateur de prise et de durcissement
CN112110703A (zh) * 2020-08-17 2020-12-22 济南大学 一种防水抗渗修补砂浆及施工方法与应用

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2006224732B2 (en) * 2005-03-16 2011-10-27 Sika Technology Ag Hardening and setting accelerator additive, use of the latter and method for producing said additive
DE102005054190B3 (de) * 2005-11-14 2007-10-04 Rombold & Gfröhrer GmbH & Co. KG Erhärtungs- und Erstarrungsbeschleuniger und dessen Verwendung
EP1964824A1 (fr) 2007-02-13 2008-09-03 Sika Technology AG Accélérateur de prise et de durcissement pour liant hydraulique et son procédé de fabrication
EP2072479A1 (fr) * 2007-12-20 2009-06-24 Sika Technology AG Réactivation de systèmes cimenteux retardés
NZ598647A (en) * 2009-09-02 2013-05-31 Constr Res & Tech Gmbh Sprayable hydraulic binder composition and method of use
CA2811769A1 (fr) * 2010-09-27 2012-04-05 Sika Technology Ag Agent de prise rapide pour liant hydraulique, et procede pour prise rapide d'un liant hydraulique
JP5800487B2 (ja) * 2010-10-08 2015-10-28 太平洋セメント株式会社 グラウトの製造方法
JP2013544224A (ja) 2010-11-30 2013-12-12 コンストラクション リサーチ アンド テクノロジー ゲーエムベーハー 吹付けコンクリート用のセメント水和生成物
EP3819279A1 (fr) 2019-11-07 2021-05-12 Sika Technology Ag Suspensions de sulfate d'aluminium à viscosité réduite
ES2974457T3 (es) 2021-04-30 2024-06-27 Sika Tech Ag Reducción de la viscosidad de suspensiones de sulfato de aluminio con compuestos de metales alcalinos

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH648272A5 (de) 1981-10-12 1985-03-15 Sika Ag Alkalifreier abbinde- und erhaertungsbeschleuniger sowie verfahren zur beschleunigung des abbindens und erhaertens eines hydraulischen bindemittels.
GB9513116D0 (en) * 1995-06-28 1995-08-30 Sandoz Ltd Improvements in or relating to organic compounds
DK0946451T4 (da) * 1996-10-25 2005-12-27 Bk Giulini Gmbh Störknings- og hærdningsaccelerator for hydrauliske bindemidler
WO2000078688A1 (fr) 1999-06-18 2000-12-28 Mbt Holding Ag Accelerateur de prise destine au beton
GB9928977D0 (en) * 1999-12-08 2000-02-02 Mbt Holding Ag Process
JP3328258B2 (ja) * 2000-01-27 2002-09-24 ニチハ株式会社 セメント硬化促進方法
DE50007784D1 (de) * 2000-06-21 2004-10-21 Sika Ag, Vorm. Kaspar Winkler & Co Sulfat- und alkalifreier Abbinde- und Erhärtungsbeschleuniger
GB0123364D0 (en) * 2001-09-28 2001-11-21 Mbt Holding Ag Composition
GB0128438D0 (en) * 2001-11-28 2002-01-16 Mbt Holding Ag Method
JP3967279B2 (ja) 2002-06-17 2007-08-29 コンストラクション リサーチ アンド テクノロジー ゲーエムベーハー 混和剤

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
None *
See also references of WO2005075381A1 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2248780A1 (fr) 2009-05-06 2010-11-10 BK Giulini GmbH Accélérateur de prise et de durcissement
CN112110703A (zh) * 2020-08-17 2020-12-22 济南大学 一种防水抗渗修补砂浆及施工方法与应用

Also Published As

Publication number Publication date
JP2007520413A (ja) 2007-07-26
US20110017100A1 (en) 2011-01-27
JP2011001266A (ja) 2011-01-06
WO2005075381A1 (fr) 2005-08-18
NO20063950L (no) 2006-09-05
US20100071595A1 (en) 2010-03-25

Similar Documents

Publication Publication Date Title
WO2005075381A1 (fr) Accelerateur de solidification et de rigidification a base d'eau destine a des liants hydrauliques et procede de fabrication
EP0946451B2 (fr) Accelerateur de solidification et de prise pour liants hydrauliques
EP1878713B1 (fr) Dispersion stable d'accélérateur de prise pour l'application de béton projeté ayant une haute teneur en matière active
EP1964824A1 (fr) Accélérateur de prise et de durcissement pour liant hydraulique et son procédé de fabrication
CH658854A5 (de) Zusatzmittel fuer zement, beton oder moertel, verfahren zu dessen herstellung und dessen verwendung.
EP1167317A1 (fr) Accelerateur de prise et de durcissement exempt de métaux alcalins
DE3121814A1 (de) "zusatzmischung fuer zement"
DE60213624T2 (de) Beschleunigerzusammensetzung
WO2008098962A2 (fr) Accélérateur de prise et de durcissement contenant de l'acide silicique, destiné à des liants hydrauliques et procédé de fabrication
DE102007040349B4 (de) Mineralisches Bindemittel sowie ein Verfahren zu seiner Herstellung
EP1575869B1 (fr) Accelerateur de solidification et de durcissement pour des liants hydrauliques et procede pour sa production
EP2607329A1 (fr) Accélérateur
WO2006097316A1 (fr) Accelerateur de prise et de durcissement pour liants hydrauliques, son utilisation et procede de realisation associe
WO2004087606A1 (fr) Composition de materiau de construction pulverulente
EP2746237A1 (fr) Activateur pour ciment
EP3142989B1 (fr) Accélérateur de prise et de durcissement stabilisé pour liant hydraulique
EP2066595B1 (fr) Ciment portland contenant du liant, et hydrate de calcium
DE102005054190B3 (de) Erhärtungs- und Erstarrungsbeschleuniger und dessen Verwendung
EP1095922B2 (fr) Accélérateurs de prise et de durcissement stabilisés à faible viscosité
DE2914215A1 (de) Verfahren zur herstellung von moerteln und betonen und mittel hierfuer
DE3932908C2 (de) Glasfaserverstärkter Zement oder Beton
DE102016114340B3 (de) Verfahren zur Herstellung eines Erstarrungsbeschleunigers für hydraulische Bindemittel
EP4082995B1 (fr) Réduction de la viscosité des suspensions de sulfate d'aluminium avec des composés de métal alcalin
EP3819279A1 (fr) Suspensions de sulfate d'aluminium à viscosité réduite
DE102019214460A1 (de) Zement, Verfahren zur Herstellung von Zement und Verfahren zur Herstellung von Beton

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: 20060906

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU MC NL PL PT RO SE SI SK TR

17Q First examination report despatched

Effective date: 20070221

DAX Request for extension of the european patent (deleted)
18D Application deemed to be withdrawn

Effective date: 20070704

D18D Application deemed to be withdrawn (deleted)
17Q First examination report despatched

Effective date: 20100817

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: 20140902