EP3145891A1 - Accélérateur pour liants hydrauliques présentant une longue durée de maniabilité et une très grande résistance initiale - Google Patents

Accélérateur pour liants hydrauliques présentant une longue durée de maniabilité et une très grande résistance initiale

Info

Publication number
EP3145891A1
EP3145891A1 EP15724985.5A EP15724985A EP3145891A1 EP 3145891 A1 EP3145891 A1 EP 3145891A1 EP 15724985 A EP15724985 A EP 15724985A EP 3145891 A1 EP3145891 A1 EP 3145891A1
Authority
EP
European Patent Office
Prior art keywords
accelerator
phosphoric acid
binder
acid ester
calcium
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.)
Pending
Application number
EP15724985.5A
Other languages
German (de)
English (en)
Inventor
Emmanuel GALLUCCI
Patrick JUILLAND
Arnd Eberhardt
Lukas Frunz
Christian BÜRGE
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
Publication of EP3145891A1 publication Critical patent/EP3145891A1/fr
Pending 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
    • C04B24/02—Alcohols; Phenols; Ethers
    • 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
    • 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
    • C04B24/24—Macromolecular compounds
    • C04B24/28—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C04B24/32—Polyethers, e.g. alkylphenol polyglycolether
    • 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
    • C04B28/04—Portland cements
    • 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
    • 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
    • C04B40/0042—Powdery mixtures
    • 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
    • C04B2103/0027—Standardised cement types
    • 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
    • C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
    • C04B2103/10—Accelerators; Activators
    • C04B2103/12—Set accelerators
    • 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
    • C04B2103/14—Hardening accelerators
    • 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
    • C04B2103/30—Water reducers, plasticisers, air-entrainers, flow improvers
    • C04B2103/32—Superplasticisers

Definitions

  • the invention relates to additives for hydraulic binders and systems made therefrom, such as concrete and mortar.
  • the hydraulic binders and systems made therefrom such as concrete and mortar.
  • the present invention relates to an accelerator for hydraulic binders comprising at least one phosphoric acid ester of a polyvalent one
  • composition comprising at least one or consisting of at least one inventive
  • Formwork can be taken out, transported, stacked or prestressed or the roads or slopes can be driven or loaded.
  • efficient concrete recipes with e.g. low w / c values or high cement contents, often also used for heat or steam treatments. These treatments require a lot of energy and additional equipment, so because of rising energy prices, significant investment costs and durability as well as exposed concrete problems
  • alkali-free solidification accelerators for hydraulic binders are known which are intended to avoid these disadvantages.
  • an alkali-free solidification and hardening accelerator is added, this accelerator containing aluminum hydroxide and optionally aluminum salts and organic carboxylic acids.
  • Hydration control have the disadvantage that the cement mixtures after Tighten the accelerator very quickly. This is usually also desirable when used as shotcrete.
  • known systems are not suitable if the cement mixture has to be further processed after activation or if the processed concrete has to be loaded after a short time. In the known systems for the
  • Shotcrete application is not given further processability after activation.
  • Composition such as a cement, concrete or mortar mixture
  • Compared to non-activated concrete accelerator according to the invention causes massively increased early strengths, which allows early stripping or loading of the manufactured parts. At the same time, however, the processability of the accelerated mixture is maintained over a long period of time.
  • the setting and / or hardening accelerator for hydraulic binders according to the invention comprises at least one phosphoric acid ester of a polyhydric alcohol and at least one calcium compound.
  • polyhydric alcohol is a hydroxy-functional
  • Alcohol having more than one hydroxyl group understood, for example, with two, three, four or five hydroxyl groups.
  • Particularly preferred is an alcohol having three hydroxyl groups, that is, a trihydric alcohol.
  • Suitable alcohols are, for example, polyhydric alkyl alcohols such as propanediol, butanediol, glycerol, diglycerol, polyglycerol, trimethylolethane,
  • Trimethylolpropane 1, 3,5-pentanetriol, erythritol, pentaerythritol, dipentanerythritol, Sorbitol, sorbitan, glucose, fructose, sorbose or isosorbide. Particularly preferred is glycerin.
  • the above-mentioned ester is obtained by esterification from a polyhydric alcohol with phosphoric acid or its salts.
  • the ester is a partial ester or partial ester of a polyhydric alcohol, preferably a trihydric alcohol.
  • partial or partial ester of a polyhydric alcohol it is meant that the polyhydric alcohol has one or more free hydroxyl groups besides one or more ester bonds, the ester may be a mono, di-di triester, preferably a monoester, preferably a monoester Monoesters of a dihydric or trihydric alcohol, more preferably one
  • the phosphoric acid for the preparation of the ester can be present as free acid or else as salt or partial salt, where the term "salt" here and below refers to the product of a neutralization reaction of the phosphoric acid with a base and of the phosphates which form on drying. means that not all acid functions of the phosphoric acid have been neutralized.
  • Phosphorklareesters completely or partially neutralized, wherein the salt is a metal, alkali or alkaline earth metal salt, that is a salt of monovalent or polyvalent cations, preferably a sodium, potassium, calcium, magnesium, zinc or aluminum salt, preferably a sodium or Aluminum salt, is.
  • the free acid groups preferably a sodium, potassium, calcium, magnesium, zinc or aluminum salt, preferably a sodium or Aluminum salt, is.
  • the calcium compound is preferably an inorganic and / or organic salt, for example with the anions oxide, hydroxide, sulphate, sulphide, carbonate, bicarbonate, chloride, fluoride, bromide, iodide, carbide, nitrate, nitrite, bromate, iodate, phosphate, phosphite, Lactate, acetate, gluconate, Stearate, citrate, propionate and / or mixtures thereof and / or hydrates of these salts.
  • Particularly preferred are calcium oxide and calcium hydroxide, and / or the hydrates thereof, in particular calcium oxide.
  • Suitable phosphoric acid esters for the setting and / or hardening accelerators according to the invention are, for example, glycerol phosphates.
  • Glycerol monophosphate is preferred, glycerol-2-phosphate or glycerol-3-phosphate being particularly preferred, and / or hydrates thereof.
  • the setting and hardening accelerator according to the invention is used in various fields, in particular in concrete and cement technology.
  • the accelerator has very good
  • compositions that is, to accelerate the setting and / or hardening of hydraulic binders, in particular of
  • Quick cement, as well as mortar or concrete made therefrom can be used.
  • mortar or concrete can be produced with the accelerator according to the invention, which has a high early and final strength.
  • the setting and / or hardening accelerator according to the invention is therefore particularly suitable when the hydraulically setting
  • Composition very quickly after application must be resilient or walkable, for example, in road or bridge construction, in the prefabrication of concrete elements in concrete and reinforced concrete precast elements or in runway renovations, especially at runways, so that the finished parts already de-energized after a few hours, transported, stacked or can be biased or the roads or slopes can be traveled.
  • Hardening accelerator proved to be a particularly fast accelerator compared to conventional accelerators.
  • the accelerators proved to be a particularly fast accelerator compared to conventional accelerators.
  • hydraulic binders or compositions basically all hydraulically setting substances known to the concrete expert can be used. In particular, these are hydraulic
  • Binders such as cements, such as Portland cements or
  • Further hydraulically setting substances in the context of the present invention are burnt lime or calcined paper sludge from papermaking residues. Cement is preferred as the hydraulic binder.
  • additives such as sand, gravel, stones, quartz, crayon and as additives usual ingredients such as
  • plasticizers such as lignosulfonates, sulfonated naphthalene-formaldehyde condensates, sulfonated melamine-formaldehyde condensates or polycarboxylate ethers, other accelerators, corrosion inhibitors, retarders, Schwlashduzierer, defoamers or pore formers possible.
  • the accelerator according to the invention can be used according to the invention
  • the invention therefore additionally relates to an additive in liquid or solid form comprising at least one accelerator according to the invention.
  • the two essential components of the invention, the phosphoric acid ester of a polyhydric alcohol and the calcium compound, for the technical effect of the invention are not added at the same time, but can be added in temporally and spatially separate process steps of the mixture to be accelerated or already present.
  • Accelerator premixed preferably without hydraulic binder.
  • the additive preferably contains a condenser in addition to the accelerator.
  • a condenser for example
  • Polycarboxylatvercrever considerablyer as are known for example in concrete chemistry as Hoch antiquesvercreer, or mixtures thereof, in question.
  • polycarboxylate liquefiers as described, for example, in EP 0056627 B1, EP 0840712 B1, EP 1 136508 A1, EP 1 138697 B1 or EP 1348729 A1.
  • liquefiers which have been prepared after the polymer-analogous reaction as described, for example, in EP 1 138697 B1 or EP 1348729 A1.
  • the accelerator or additive containing the accelerator may also contain other ingredients.
  • other ingredients are solvents, especially water, or additives, such as others
  • accelerating substances such as thiocyanates, nitrates or aluminum salts, acids or their salts or amine-containing substances such as alkanolamines, retarders, shrinkage reducers, defoamers or
  • Foaming agent If the accelerator according to the invention or the additive containing the accelerator is used in liquid form, is for the
  • Solvents are, for example, hexane, toluene, xylene, methylcyclohexane, Cyclohexane or dioxane and alcohols, especially ethanol or
  • Solvent is.
  • the accelerator according to the invention or the additive containing the accelerator can also be present in a solid state of matter,
  • the inventive accelerator can, for example, in the solid
  • the inventive accelerator can also be mixed with a liquid condenser and used as a liquid additive.
  • the liquid additive may also subsequently be returned to the solid state, for example in powder form, e.g. by spray drying, with the aid of protective colloids or other drying auxiliaries.
  • the accelerator according to the invention or the additive containing the accelerator in the solid state of aggregation may also be part of a cement composition, a so-called dry mixture, which is storable for a long time and is typically packed in sacks or stored in silos and used.
  • the accelerator according to the invention or the additive containing the accelerator can also be added to a customary concrete composition with or shortly before or shortly after the addition of the water. Has shown to be particularly suitable in this case the addition of
  • Accelerator according to the invention in the form of an aqueous solution or dispersion, in particular as mixing water or as part of the
  • the accelerator or additive according to the invention can also be sprayed in liquid form before or after the grinding of the hydraulic or latently hydraulic binder onto the binder, the concrete, mortar, and non-hydraulic additives.
  • the hydraulic binder can partially with the accelerator or the
  • Admixture containing the accelerator can be coated. This allows the production of a hydraulic binder, in particular cement or latent hydraulic slag, which already contains the accelerator or the additive containing the accelerator and so as
  • Ready mix for example, as so-called quick cement
  • this cement After addition of the mixing water, this cement has the desired properties of fast setting and high early strength, without the need to add another additive in addition to the mixing water at the construction site.
  • the present invention relates to a binder-containing mixture comprising at least one hydraulically setting binder and at least one inventive setting and
  • Suitable binders are, for example, cement, in particular Portland cements or high-alumina cements and mixtures thereof with fly ash, silica fume, slag, blast furnace slag, gypsum and limestone filament or calcined lime, a latently hydraulic powder or inert microscopic powder. Containing as a binder
  • Mixtures are preferably concrete compositions in question.
  • the mixture can further additives such as sand, gravel, stones, quartz powder, crayons and additives such as conventional ingredients
  • Betonver hypothalene-formaldehyde condensates for example, lignosulfonates, sulfonated naphthalene-formaldehyde condensates, sulfonated melamine-formaldehyde condensates or polycarboxylate (PCE), accelerators, corrosion inhibitors, retarders, Schwlashduzierer, defoamers or foaming agents included.
  • the binder-containing mixture contains in addition to the accelerator at least one condenser, preferably a polycarboxylate ether-based condenser (PCE).
  • the accelerator of the present invention is preferably used in an amount of 0.001 to 2% by weight of phosphoric acid ester based on the weight of the binder and 0.001 to 10% by weight of calcium based on the weight of the binder to achieve the desired effect.
  • Several accelerators can also be used mixed to achieve the desired effect.
  • the calcium compound is as
  • Solid used It is advantageous, as described above, to use a solid having a high specific surface area. A high specific surface leads to an improvement of the accelerator effect. In order to achieve the same accelerating effect, less of a calcium compound having a high specific surface area can be used proportionally as compared with a calcium compound having a small specific surface area. It is therefore preferable for the present invention to meter the calcium compound such that a ratio of the total surface area of the
  • Calcium compound to the amount of hydraulic binder of about 50 to 70 m 2 / kg of binder preferably about 55 to 65 m 2 / kg of binder, more preferably about 57 to 63 m 2 / kg of binder results.
  • the amount of the phosphoric acid ester to the amount of the calcium compound is preferably adjusted in this embodiment, that 0.001 to 0.05, preferably 0.005 to 0.04, particularly preferably 0.008 to 0.02 g
  • the present invention relates to a process for the preparation of a binder-containing mixture wherein the at least one accelerator according to the invention is added separately or premixed as admixture in solid or liquid form to the binder.
  • the present invention relates to a process for accelerating the setting and hardening of hydraulic binders and mortar or concrete made therefrom, wherein a mixture containing hydraulic binders, a setting and hardening accelerator according to the invention in an amount of phosphoric acid ester from 0.001 to 10 Wt .-%, preferably 0.01 to 1 wt .-%, particularly preferably 0.01 to 0.1 wt .-%, based on the weight of the cement and an amount of calcium from 0.001 to 10 wt .-%, preferably 0.01 to 1 wt. -%, particularly preferably 0.01 to 0.1 wt .-%, based on the weight of the cement added.
  • a mixture containing hydraulic binders, a setting and hardening accelerator according to the invention in an amount of phosphoric acid ester from 0.001 to 10 Wt .-%, preferably 0.01 to 1 wt .-%, particularly preferably 0.01 to 0.1 wt .-%, based
  • accelerator and preferably additionally added at least one condenser to a hydraulic binder, the added amount of the total additive 0.01 to 10 wt .-%, preferably 0.1 to 10 wt .-%, more preferably 1 to 5 wt .-%, based on the weight of the hydraulic binder.
  • Binder provided, which accelerates the setting and hardening process of the hydraulic binder without adversely affecting the
  • the additive according to the invention and in particular the setting and hardening accelerator according to the invention is thus particularly suitable if the hydraulically setting composition has to be loadable or passable again very quickly after application, for example in road construction or bridge construction, in the prefabrication of concrete elements in precast concrete and reinforced concrete components or at runway renovations, especially at
  • Airstrips This allows the finished parts already after a few hours be disassembled, transported, stacked or prestressed or the
  • Hardening accelerator proved to be a particularly fast accelerator compared to conventional accelerators.
  • the accelerators proved to be a particularly fast accelerator compared to conventional accelerators.
  • Accelerator according to the invention has neither a negative influence on the processing time nor on the final strength of the mortar or concrete produced therewith.
  • the early strength after a few hours has proved to be significantly higher than in all comparable systems.
  • glycerol-2-monophosphate glycerol phosphate disodium salt pentahydrate, available for example from Sigma Aldrich
  • the polycarboxylate ether condenser used for Z1 (Sika® Viscocrete® 20 U, available from Sika Buch AG) was used as additive. Of this between 1 and 1 .6 wt .-%, based on the cement, was added together with the mixing water to the mortar mixture.
  • Another polycarboxylate ether condenser (Glenium® ACE30, available from BASF Admixtures GmbH) was used as additive. Of this, between 1 and 1 .6 wt .-%, based on the cement, together with the mixing water added to the mortar mixture.
  • the sand used (large grain 8 mm), the cement and in the case of MM2 also 3 wt .-% (based on the weight of the cement used)
  • Calcium oxide (Nekafin ® 2 Netstal of Kalkfabrik AG, Switzerland, with a specific surface area (BET) of 1 .9 m 2 / g) were dry blended in a Hobart mixer for 1 minute. Within 30 seconds, the mixing water in which the respective additive was dissolved was added and mixing was continued for 2.5 minutes.
  • BET specific surface area
  • Example B1 with additive Z1 represents an example according to the invention, while examples C2 to V6 represent comparative examples.
  • V2 Z2 (1.09 weight-MM2 (with 3 21 1 197 136 1 1 1
  • V3 Z3 (1.10 weight MM2 (with 3 197 187 153 131
  • V4 Z1 (1.60 parts by weight MM1 250 247 251 213
  • V5 Z2 (1.60 weight MM1 263 245 237 231
  • V6 Z3 (1.60 weight MM1 257 235 213 210
  • Table 1 Slump size (in mm) after 0, 20, 40, and 60 minutes (min).
  • ABSM spreading dimension
  • Table 2 shows compressive strength values (in N / mm 2 ) of the inventive accelerated mortar composition B1
  • Table 2 Compressive strengths in N / mm after 4 and 6 hours (h).
  • Table 2 clearly shows the effect of the accelerator according to the invention in Example B1.
  • V2, V3 or V4 when the accelerator according to the invention is used, practically doubling occurs after 6 h, after 4 h almost a tripling of the strength values.
  • compositions (V5 and V6) are expected to be even greater.
  • the effect of the accelerator according to the invention containing a phosphoric acid ester of a polyhydric alcohol and a calcium compound, is not merely a linear combination of the effects of the individually already accelerating components
  • Mortar mixtures MM3, MM4, MM7, MM8, MM9, MM1 1, MM12, MM13 and MM14 additionally contained calcium oxide (CaO), available under the
  • Mortar mixtures MM3, MM8, MM9, MM1 1, MM12, MM13 and MM14 additionally contained glycerol-2-monophosphate (glycerol phosphate
  • GPD Disodium salt
  • Disodium salt pentahydrate CaO (calcium oxide) and PCE (polycarboxylate ether condenser). The percentages are by weight based on the weight of the hydraulic binder used.
  • Hydraulic binder, sand and (in the case of MM3, MM4, MM7, MM8, MM9, MM1 1, MM12, MM13 and MM14) calcium oxide and (in the case of MM3, MM8, MM9, MM1 1, MM12, MM13 and MM14) GPD were dry blended in a Hobart mixer for 30 seconds.
  • the slump (ABM) and on the other hand the compressive strength (Tables 4 and 5) were determined.
  • the spreading dimension (ABM) of the mortar was determined according to EN 1015-3.
  • the compressive strength was measured with a needle penetrometer (Mecmesin BFG500 on prisms (40 x 40 x 160 mm) according to the standard EN 196-1.
  • Table 4 Slump size (ABM) in mm after 0 and 30 minutes (min) and compressive strengths in N / mm 2 after 4, 6, 8 and 24 hours (h) of the example mixtures MM3-MM5. Also the invention admixed as individual components
  • accelerated mortar mixtures MM8 (Example B12) and MM9 (Example B13) after 48 hours are at least as high as those of non-inventive mixtures MM6 (Example V10) and MM7 (Example V1 1).
  • inventive examples B14 to B17 clearly show that there is an optimum range for the synergistic effect of the inventive
  • the accelerator according to the invention and an additive in solid or liquid form containing the accelerator according to the invention can be used in any compositions containing hydraulically setting binders.

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  • 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)
  • Dispersion Chemistry (AREA)
  • Nanotechnology (AREA)

Abstract

La présente invention concerne un accélérateur pour liants hydrauliques comprenant au moins un ester phosphorique d'un alcool polyvalent et au moins un composé de calcium. L'accélérateur selon l'invention permet de fabriquer une composition de mortier ou de béton à durcissement très rapide qui présente une grande résistance initiale et néanmoins des propriétés de maniabilité très avantageuses et qui permet ainsi un décoffrage précoce ou une mise en charge précoce sans affecter la résistance finale.
EP15724985.5A 2014-05-21 2015-05-20 Accélérateur pour liants hydrauliques présentant une longue durée de maniabilité et une très grande résistance initiale Pending EP3145891A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP14169313 2014-05-21
PCT/EP2015/061152 WO2015177232A1 (fr) 2014-05-21 2015-05-20 Accélérateur pour liants hydrauliques présentant une longue durée de maniabilité et une très grande résistance initiale

Publications (1)

Publication Number Publication Date
EP3145891A1 true EP3145891A1 (fr) 2017-03-29

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP15724985.5A Pending EP3145891A1 (fr) 2014-05-21 2015-05-20 Accélérateur pour liants hydrauliques présentant une longue durée de maniabilité et une très grande résistance initiale

Country Status (3)

Country Link
US (1) US9919967B2 (fr)
EP (1) EP3145891A1 (fr)
WO (1) WO2015177232A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6948955B2 (ja) 2015-06-26 2021-10-13 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Ｃｏｎｓｔｒｕｃｔｉｏｎ Ｒｅｓｅａｒｃｈ ＆ Ｔｅｃｈｎｏｌｏｇｙ ＧｍｂＨ 水硬性組成物用添加剤
RU2740696C2 (ru) * 2016-03-22 2021-01-19 Сикэ Текнолоджи Аг Композиция на основе оксида кальция
EP3222599A1 (fr) * 2016-03-22 2017-09-27 Sika Technology AG Accelerateur
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US9919967B2 (en) 2018-03-20
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