EP1404627A1 - Procede pour accelerer la prise et le durcissement de liants hydrauliques et de melanges contenant ces derniers - Google Patents

Procede pour accelerer la prise et le durcissement de liants hydrauliques et de melanges contenant ces derniers

Info

Publication number
EP1404627A1
EP1404627A1 EP02780848A EP02780848A EP1404627A1 EP 1404627 A1 EP1404627 A1 EP 1404627A1 EP 02780848 A EP02780848 A EP 02780848A EP 02780848 A EP02780848 A EP 02780848A EP 1404627 A1 EP1404627 A1 EP 1404627A1
Authority
EP
European Patent Office
Prior art keywords
setting
hardening accelerator
hardening
accelerator according
acids
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Withdrawn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
EP02780848A
Other languages
German (de)
English (en)
Inventor
Christian BÜRGE
Harald Bach
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 Schweiz AG
Original Assignee
Sika Schweiz 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 Schweiz AG filed Critical Sika Schweiz AG
Priority to EP02780848A priority Critical patent/EP1404627A1/fr
Publication of EP1404627A1 publication Critical patent/EP1404627A1/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Withdrawn legal-status Critical Current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
    • C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
    • C04B24/12—Nitrogen containing compounds organic derivatives of hydrazine
    • C04B24/122—Hydroxy amines
    • 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
    • C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
    • C04B2103/10—Accelerators; Activators

Definitions

  • the present invention relates to an additive and a method for accelerating the setting and hardening of hydraulic binders, in particular for the production of prefabricated elements and for accelerating the strength development of concrete produced on the construction site, particularly preferably of self-compacting concrete (Seif Compacting Concrete, SCC ).
  • Chlorine-containing setting accelerators are generally undesirable on a construction site because they can cause corrosion both on the reinforcing bars in the concrete and on construction site equipment. It is also known that chloride-containing
  • Setting accelerator greatly reduce the chemical resistance, especially the sulfate resistance of the cement and the long-term strength.
  • Nitrates have long been known as an "antifreeze", i.e. they accelerate setting at low temperatures. In contrast, the effect of the nitrates is insignificant at room temperatures (see, for example, US 4,337,094 (Tokan)).
  • Calcium formate is already described in DE 2 611 419 as a hardening accelerator for Portland cement, but its effect is significantly lower than that of CaCl 2 . In addition, it has insufficient solubility in water.
  • a very good setting accelerator is Ca [N0 2 ] 2 (see SU 563 392), but its use in Europe in the necessary concentrations is unthinkable due to its high toxicity.
  • Organic setting accelerators have been described in various ways, but only a few are important on the market.
  • Mono-, di- and triethanolamine in combination with nitrates accelerate the setting of cement at low temperatures.
  • a combination of triethanolamine with aluminum sulfate increases the early strength of building materials according to US Pat. No. 3,782,991 (Bürgen).
  • the corrosion-inhibiting effect of alkanolamines on steel is e.g. known from US 4,726,914.
  • the common and / or the accelerators described above all have one or more disadvantages. They only work at low temperatures, but not at room temperature, they increase the early strength, but reduce the final strength compared to a corresponding sample without additives, they shorten the processing time or they are toxic or corrosive.
  • EP 0 554 046 A1 describes the use of low molecular weight glycols together with calcium nitrate and calcium nitrite as setting accelerators. An indication of an effect as a hardening accelerator, i.e. accelerated strength development, EP 0 554 046 AI is not apparent.
  • the aim of the present invention was therefore to provide a setting and hardening accelerator which, especially in combination with super liquefier, gives high initial and final strengths of hydraulic binders or of mixtures containing hydraulic binders, in particular of concrete and mortar, without shorten the processing time.
  • accelerators manufactured that meet the above requirements. Further technical advantages of the accelerators according to the invention are their freedom from chloride and nitrite, and the fact that the mixtures, not least thanks to the addition of an alkanolamine, do not have a corrosive effect on reinforcing steel.
  • the accelerator according to the invention also as
  • Designated additive is particularly suitable for accelerating the setting and hardening of hydraulic binders, in particular for the manufacture of prefabricated elements and for accelerating the strength development of concrete made on site, particularly preferably of self-compacting concrete (Seif Compacting Concrete, SCC).
  • SCC self-compacting concrete
  • the usual hardening acceleration by heat electric or oil heating or steam
  • the shuttering times for the concrete can be shortened or concrete can be poured on even at low temperatures.
  • Applications also arise in the production of quick-setting cement and mortar mixtures, especially for fixing prefabricated parts or for casting molded parts.
  • One object of the present invention is therefore a setting and hardening accelerator for hy draulic binders consisting of or containing an accelerating composition consisting of the following components and / or acid / base reaction products of these components: (1) at least one inorganic nitrate,
  • Another object of the present invention is a method for accelerating the setting and hardening of a hydraulic binder, such as cement, in pure form or as a mixture with latent hydraulic binders, by adding usually 0.2 to 5.0% by weight of the accelerator according to the invention, based on the weight of the binder.
  • the accelerators according to the invention can be used as powders, dispersed or dissolved in water and / or in combination with one or more other concrete admixtures such as water-reducing admixtures, super plasticizers, plasticizers, silica slurries and / or dispersants.
  • the setting and hardening accelerators for hydraulic binders according to the invention consist of or contain at least one inorganic nitrate, which is preferably an alkali metal, alkaline earth metal or aluminum nitrate or mixtures thereof.
  • a preferred alkanolamine component consists of propanol and / or ethanol amines, in particular mono-, di- or trialkanol amines, and also alkyl alkanol amines, preferably alkyl alkanol amines with Cl-C3-alkylene.
  • alkanolamines are monoethanolamine, diethanolamine, triethanolamine, N-methyl diethanolamine, triisopropanolamine and mixtures thereof.
  • a preferably used carboxylic acid component consists of carboxylic acids which are selected from the group of unsubstituted carboxylic acids, in particular C1-C6 carboxylic acids, OC-hydroxycarboxylic acids, polyhydroxycarboxylic acids, oc-aminocarboxylic acids and mixtures thereof.
  • ⁇ -Hydroxycarboxylic acids, polyhydroxycarboxylic acids and ⁇ -aminocarboxylic acids with 1 to 6 C atoms, and optionally aryl-substituted Cl-C6 ⁇ -hydroxymonocarboxylic acids are particularly preferred.
  • suitable and preferred acids are ⁇ -hydroxymonocarboxylic acids, such as lactic acid and mandelic acid.
  • the alkanolamine is used as a salt of an organic carboxylic acid, the carboxylic acid preferably being one of the abovementioned carboxylic acids.
  • An alkanolamine as salt of an acid or an alkanolamine as salt of different acids, or different alkanolamines as salt of the same acid or different alkanolamines as salts of different acids can be used for the production of the accelerator.
  • the at least one polyol is preferably a C2-C6 polyol.
  • a particularly preferred polyol is 1, 2, 3-propanetriol.
  • the accelerator usually contains the nitrate component in amounts of 10-58% by weight, the alkanolamine component in amounts of 1-20% by weight, the carboxylic acid component in amounts of 1-15% by weight and the polyol component in Amounts of 2-20% by weight.
  • the accelerator preferably contains the nitrate component in amounts of 15-50% by weight, the alkanolamine component in amounts of 5-20% by weight, the carboxylic acid component in amounts of 2-12% by weight and the polyol component in amounts of 2- 15% by weight
  • the accelerator is usually in a hydraulic binder, especially cement Amount of 0.2-5.0 wt .-% based on the weight of the hydraulic binder added, preferably in an amount of 0.2-3.5 wt .-%.
  • Another object of the present invention is a method for accelerating the setting and hardening of a hydraulic binding agent, such as cement, in pure form or as a mixture with latent hydraulic binding agents such as fly ash, blast furnace slag, puzzolane, oil slate burn-up or silica fume, and from it Mortar and concrete, by adding 0.2 to 5.0% by weight of the accelerator according to the invention, based on the weight of the binder.
  • a hydraulic binding agent such as cement
  • latent hydraulic binding agents such as fly ash, blast furnace slag, puzzolane, oil slate burn-up or silica fume
  • the accelerators according to the invention can be used as powder, dispersed or dissolved in water and / or in combination with one or more other concrete admixtures such as water-reducing admixtures, super-liquefiers, liquefiers, silica slurries and / or dispersants.
  • a powdered setting and hardening accelerator can also be used premixed in hydraulic binders or in dry mortar and concrete, and it can be mixed with the binder, for example, when it is manufactured in the factory.
  • the accelerator is added to the dry or water-mixed binder, mortar or concrete in the factory, on the construction site, in the mixer, in the feed pump or via a static mixer with a powder metering device or a liquid metering device directly into the mixture.
  • test mixture for Examples 1 to 4 is composed as follows:
  • Example 7 This example shows the difference between an accelerator according to the invention and a commercially available accelerator based on calcium nitrate and calcium chloride. The tests were carried out at 10 ° C. The concrete was plasticized with 1% polycarboxylate super plasticizer.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

L'invention concerne un accélérateur de prise et de durcissement ainsi qu'un procédé pour accélérer la prise et le durcissement de liants hydrauliques au moyen d'un tel accélérateur. Les constituants de cet accélérateur qui sont essentiels pour l'accélération sont le nitrate, l'alcanolamine, l'acide hydroxycarboxylique et le polyol. L'accélération du durcissement ne s'accompagne pas d'une perte rapide d'aptitude à la mise en oeuvre, à la différence des systèmes accélérés connus.
EP02780848A 2001-06-22 2002-05-23 Procede pour accelerer la prise et le durcissement de liants hydrauliques et de melanges contenant ces derniers Withdrawn EP1404627A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP02780848A EP1404627A1 (fr) 2001-06-22 2002-05-23 Procede pour accelerer la prise et le durcissement de liants hydrauliques et de melanges contenant ces derniers

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
EP01114736A EP1270529A1 (fr) 2001-06-22 2001-06-22 Procédé d'accélération de la prise et du durcissement des liants hydraulic et compositions utilisées pour ceci
EP01114736 2001-06-22
EP02780848A EP1404627A1 (fr) 2001-06-22 2002-05-23 Procede pour accelerer la prise et le durcissement de liants hydrauliques et de melanges contenant ces derniers
PCT/IB2002/001798 WO2003000617A1 (fr) 2001-06-22 2002-05-23 Procede pour accelerer la prise et le durcissement de liants hydrauliques et de melanges contenant ces derniers

Publications (1)

Publication Number Publication Date
EP1404627A1 true EP1404627A1 (fr) 2004-04-07

Family

ID=8177753

Family Applications (2)

Application Number Title Priority Date Filing Date
EP01114736A Withdrawn EP1270529A1 (fr) 2001-06-22 2001-06-22 Procédé d'accélération de la prise et du durcissement des liants hydraulic et compositions utilisées pour ceci
EP02780848A Withdrawn EP1404627A1 (fr) 2001-06-22 2002-05-23 Procede pour accelerer la prise et le durcissement de liants hydrauliques et de melanges contenant ces derniers

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP01114736A Withdrawn EP1270529A1 (fr) 2001-06-22 2001-06-22 Procédé d'accélération de la prise et du durcissement des liants hydraulic et compositions utilisées pour ceci

Country Status (3)

Country Link
US (2) US20040244655A1 (fr)
EP (2) EP1270529A1 (fr)
WO (1) WO2003000617A1 (fr)

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US7247201B2 (en) * 2004-10-07 2007-07-24 Ronald Barbour Pre-blend cement compositions containing non-chloride accelerators
EP2072479A1 (fr) * 2007-12-20 2009-06-24 Sika Technology AG Réactivation de systèmes cimenteux retardés
EP2105419A1 (fr) * 2008-03-28 2009-09-30 Lafarge Additifs pour ciment
US20100286312A1 (en) 2009-05-06 2010-11-11 Boral Material Technologies Inc. Amine Sacrificial Agents and Methods and Products Using Same
JP5798395B2 (ja) 2010-07-16 2015-10-21 花王株式会社 水硬性粉体の製造方法
JP5848633B2 (ja) 2011-03-15 2016-01-27 花王株式会社 水硬性組成物用分散剤
DE102011101448A1 (de) * 2011-05-13 2012-11-15 Dyckerhoff Ag Verbundwerkstoff sowie Verfahren zu dessen Herstellung, Verbundbauteil aus einem derartigen Verbundwerkstoff, sowie Schwimmkörper, impaktresistente Schichtbetonkonstruktion und Bauelement daraus
EP2527308A1 (fr) 2011-05-26 2012-11-28 Sika Technology AG Accélérateur de durcissement pour liant minéral
EP2527310A1 (fr) 2011-05-26 2012-11-28 Sika Technology AG Accélérateur de durcissement pour compositions de liant minérales
EP2527307A1 (fr) 2011-05-26 2012-11-28 Sika Technology AG Dialkanolamine comme additif pour le broyage de matières solides
NO20111524A1 (no) 2011-11-04 2013-05-06 Mapei As Herdningsakselerator og en fremgangsmate for a akselerere herdningen av hydrauliske bindemidler og blandinger derav
WO2014003972A1 (fr) * 2012-06-25 2014-01-03 Dow Global Technologies Llc Composition d'agent de mouture pour le broyage de ciment
JP6001357B2 (ja) 2012-06-29 2016-10-05 花王株式会社 水硬性組成物
NO20121086A1 (no) * 2012-09-25 2014-03-26 Yara Int Asa Antifrysesammensetning for produksjon av bestandig betong under kalde temperaturforhold
WO2014118051A1 (fr) 2013-01-30 2014-08-07 Sika Technology Ag Accélérateur de durcissement pour liants minéraux
NO20131392A1 (fr) * 2013-10-21 2015-04-22 Yara Int Asa
KR101713828B1 (ko) * 2014-11-04 2017-03-10 (주)에스엠테크 무시멘트 촉진형 혼화제 및 이를 포함하는 무시멘트 조성물
EP3221103B1 (fr) * 2014-11-21 2022-05-11 GCP Applied Technologies Inc. Procédé de fabrication de dalles de béton pressées á l'état humide
EP3109216B1 (fr) 2015-06-22 2020-09-16 HeidelbergCement AG Accélérateur de solidification et de durcissement pour liants hydrauliques
EP3222599A1 (fr) 2016-03-22 2017-09-27 Sika Technology AG Accelerateur
RU2740696C2 (ru) 2016-03-22 2021-01-19 Сикэ Текнолоджи Аг Композиция на основе оксида кальция
EP3438073A1 (fr) 2017-07-31 2019-02-06 Chryso Additif pour liant hydraulique utiles pour empêcher la formation de taches rust-coloredauxniveau de la surface de compositions hydrauliques
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Also Published As

Publication number Publication date
US20040244655A1 (en) 2004-12-09
WO2003000617A1 (fr) 2003-01-03
EP1270529A1 (fr) 2003-01-02
US20090050023A1 (en) 2009-02-26

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