EP3464213A1 - Verwendung von pflaster zur herstellung einer selbstnivellierender unterlage für heisse länder - Google Patents

Verwendung von pflaster zur herstellung einer selbstnivellierender unterlage für heisse länder

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Publication number
EP3464213A1
EP3464213A1 EP17724382.1A EP17724382A EP3464213A1 EP 3464213 A1 EP3464213 A1 EP 3464213A1 EP 17724382 A EP17724382 A EP 17724382A EP 3464213 A1 EP3464213 A1 EP 3464213A1
Authority
EP
European Patent Office
Prior art keywords
plaster
weight
use according
superplasticizer
screed
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Withdrawn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
EP17724382.1A
Other languages
English (en)
French (fr)
Inventor
Alain Jacquet
Laurence Martin
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.)
Holcim Technology Ltd
Original Assignee
Holcim Technology Ltd
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 Holcim Technology Ltd filed Critical Holcim Technology Ltd
Publication of EP3464213A1 publication Critical patent/EP3464213A1/de
Withdrawn legal-status Critical Current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
    • 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
    • C04B28/14—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 calcium sulfate cements
    • C04B28/145—Calcium sulfate hemi-hydrate with a specific crystal form
    • 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
    • C04B2111/60—Flooring materials
    • C04B2111/62—Self-levelling compositions
    • 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
    • C04B2111/76—Use at unusual temperatures, e.g. sub-zero
    • C04B2111/763—High temperatures

Definitions

  • the present invention relates to the use of plaster for the manufacture of a fluid screed castable at temperatures greater than or equal to 30 ° C.
  • a screed is a layer of mortar made from hydraulic binder, sand, water and possibly adjuvant.
  • a screed is intended to level, level even uneven support and / or coat elements and then receive the floor covering.
  • a hydraulic binder is a material that picks up and hardens by hydration
  • Plaster usually used in the building industry, comes mainly from the calcination of gypsum, calcination which can lead to anhydrite if the temperature is high enough that the dehydration of the gypsum is total.
  • plasters and anhydrites calcium sulphate hemihydrate (plaster), calcium sulfate hemihydrate ⁇ (plaster), anhydrite I, anhydrite II and anhydrite III.
  • the type of compound formed depends on the calcination method used and the calcination temperature of the gypsum.
  • Calcium sulphate hemihydrate comes mainly from natural gypsum or sources of synthetic gypsum (phospho-gypsum, titano-gypsum, citro-gypsum, FGD (Flue Gas Desulphurization) gypsum or desulfogypsum).
  • Anhydrite can be obtained by calcination. It can be as natural (rock that must be ground before use) or synthetic (example: by-product during the manufacture of hydrofluoric acid). These compounds can be made with water by turning into gypsum.
  • Plaster or anhydrite is used in the building industry as a binder, particularly for the production of fluid screeds.
  • the anhydrite screed or calcium sulphate screed is well known to those skilled in the art. It is a mortar (mixture of sand, anhydride and adjuvant) fluid based on a binder based on calcium sulphate, whether or not fired, usually prepared in a production plant (concrete plants most often) for the realization of self-leveling screeds, and delivered on site by mixer truck or delivered directly on site by a transmix type distribution system.
  • Anhydrite screed materials are the subject of EN 13454-1 and EN 13813.
  • anhydrite is generally preferred, in particular type II anhydrite, so-called “non-so-so", in order to allow the rheological properties of the anhydrite-based self-sealing mortar to be preserved during its transport, from the site of manufacture at the emplacement site, and not water-soluble semi-hydrates or unstable type III anhydrites, rapidly transforming into semi-hydrates.
  • the screed must be fluid in the fresh state, which gives it a self-compacting character.
  • hot weather that is to say temperatures of 30 ° C or higher
  • the workability of cement-based screeds is difficult to manage in practice: the high temperature accelerates the hydration reactions. results in a reduction of setting times and a rapid degradation of the rheology of the screed.
  • Portland cement-based screeds often have problems with surface cracking and drying, exacerbated when the temperature is high.
  • the conventional anhydrite-based screeds are not usable when the temperature is higher than about 30 ° C because beyond this temperature, the kinetics of hydration (if the latter takes place) is so slow that the resistances reached at 28 days are very insufficient.
  • the object of the invention is to develop a screed which can be used at temperatures above 30 ° C. and which has the technical advantages of conventional anhydrite screeds:
  • plaster that is to say calcium sulfate hemihydrate, in its crystalline form ⁇ , as a hydraulic binder, allows the manufacture of screeds usable in time.
  • the characteristics of classic anhydrite screeds are expected to be warm: good workability, self-compacting, easy finishing and mechanical strength after hardening.
  • DE 20 2007 003 608 discloses a plaster based screed in its crystalline form which can be cast at a temperature of 0 ° C to 35 ° C.
  • a plaster based screed in its crystalline form which can be cast at a temperature of 0 ° C to 35 ° C.
  • the demand for admixtures, in particular for water reducing agents is less and thus the screed according to the invention is significantly more economical.
  • the invention thus relates to the use of plaster, in its crystalline form ⁇ , for the preparation of a floor screed composition, also comprising sand and a superplasticizer, intended to be cast at a temperature greater than or equal to 30 ° C.
  • the plaster-based screeds according to the invention can thus be used in hot countries, where the ambient temperature is greater than 30 ° C., possibly greater than 35 ° C., or even greater than 40 ° C.
  • adjuvant any compound that incorporated into a formulation allows to provide particular properties.
  • binder is meant according to the present invention any compound having the property of providing cohesion to the formulation in which it is incorporated, and makes it possible to provide mechanical characteristics to said formulation (for example compressive strength , in traction, adhesion).
  • This binder may also be intended to bind inert elements such as aggregates.
  • hydraulic binder is meant according to the present invention any compound having the property of hydrating in the presence of water and whose hydration makes it possible to obtain a solid having mechanical characteristics.
  • hydraulic binder also refers to water binders.
  • the hydraulic binder according to the invention is a binder based on plaster.
  • plaster also called calcium sulfate hemihydrate or hemi-hydrated calcium sulfate, of chemical formula CaSO 4 * 0.5 H 2 O, in which the crystalline form ⁇ is predominant in mass.
  • mass content is less than 5%, relative to the total weight of crystalline forms a and ⁇ , preferably less than 2%, preferably less than 1%.
  • the invention relates to the use of plaster, in its crystalline form ⁇ , for the preparation of a floor screed composition, also comprising sand and a superplasticizer, intended to be cast at a temperature greater than or equal to 30 ° C.
  • the floor screed according to the invention may be cast at a temperature greater than or equal to 30 ° C, at a temperature greater than or equal to 35 ° C, or even at a temperature greater than or equal to 40 ° C.
  • the invention is characterized by the use, as a hydraulic binder, of plaster in its crystalline form ⁇ .
  • This plaster also called calcium sulphate hemihydrate or calcium sulphate hemihydrate, chemical formula CaSO 4 * 0.5H 2 O, can exist in two crystalline forms: the form a or the form ⁇ .
  • the two crystalline forms can be used for the preparation of screeds, the ⁇ form however giving better quality screeds and especially for a lower financial cost.
  • the composition may comprise as hydraulic binder only plaster or a mixture of plaster and filler.
  • the hydraulic binder comprises at least 52% by weight of plaster and from 0% to 48% by weight, the sum of these two percentages varying from 80% to 100%.
  • the sum of these two percentages advantageously varies from 85% to 100%, more preferably from 90% to 100%, even more preferably from 95% to 100%).
  • the plaster being most often of natural origin, it is difficult to obtain a raw material comprising exclusively calcium sulphate semi-hydrate.
  • the plaster may comprise impurities such as quartz (Si0 2 ), celestine (SrS0 4 ), carbonate phases such as calcite (CaCO 3 ), dolomite (CaMg (CO 3 ) 2 ), clay or feldspathic phases such as chlorite ((Mg, Al) 6 (Si, Al) 4 O 10 (OH) 8 ), microcline (K (Si 0 , 75 Al 0 , 25 ) 4 O 8 ), phlogopite (KMg 2 , 75 Si 3 , 5 A 10, 5 OioF 2), kaolinite (Al 2 Si 2 0 5 (OH) 4), albite (Na (AlSi 3 O), muscovite (KAl 3 Si 3 Oio (OH) 2).
  • impurities such as quartz (Si0 2 ), celestine (SrS0 4 ), carbonate phases such as calcite (CaCO 3 ), dolomite (CaMg (CO 3
  • the plaster comprises less 5%) by weight, more preferably less than 2% by weight, based on the total weight of the plaster, impurities.
  • the plaster may also include gypsum or anhydrite. A plaster with the smallest possible amounts of gypsum or anhydrite will be used.
  • the plaster comprises less than 5% by weight, more preferably less than 2% by weight, and even more advantageously less than 1% by weight, relative to the total weight of plaster, of gypsum.
  • the plaster comprises less than 5% by weight, more preferably less than 2% by weight, and even more advantageously less than 1% by weight, based on the total weight of the plaster, of anhydrite.
  • the plaster comprises less than 5% by weight, more preferably less than 2% by weight, and even more advantageously less than 1% by weight, based on the total weight of the plaster, of plaster in its crystalline form a.
  • the particle size and the specific surface area of the plaster is not critical in the invention.
  • Fillers (filler) of different kinds limestone, siliceous, fly ash, silica fume can be used in addition to plaster.
  • Replacing part of the plaster with a load reduces the cost of raw materials. Such a replacement also makes it possible to reduce the mechanical strengths when they are greater than the target. Such a replacement also makes it possible to reduce the quantities by superplasticizer.
  • the load will be inert or will have a low reactivity compared to that of plaster.
  • the filler may be, for example, limestone, ground natural calcium carbonate (eg chalk, calcite, marble or other natural calcium carbonate), precipitated calcium carbonate (also known as calcium carbonate). synthetic calcium), barium carbonate, dolomite, talc, crystalline silica, pyrogenic titanium dioxide, iron oxide, manganese oxide, titanium dioxide, kaolin, clays, mica, calcium sulphate, basalt, barium sulfate, aluminum hydroxide, bauxite, a low reactivity filler such as blast furnace slag, or a mixture thereof. Limestone, ground calcium carbonate and precipitated calcium carbonate are preferred.
  • the pH is adjusted by adding lime (CaO or Ca (OH) 2 ). It is thus possible to add from 0.1 to 0.2% by weight of CaO equivalent, relative to the weight of the plaster.
  • the screed composition according to the invention comprises adjuvants, the purpose of which is to modify the rheological properties of the mortar. Adjuvants will also influence setting time.
  • the adjuvants are added for example either in the mortar, preferably in a water-soluble sachet, or with part of the water, or in the binder, or in several vectors.
  • a superplasticizer is added.
  • a superplasticizing agent is an additive which, by its addition to an aqueous calcium sulphate composition, reduces the water demand and maintains the fluidity / rheology of the dough.
  • Superplasticizers were broadly classified into four groups: sulfonated condensates of naphthalene formaldehyde (SNF) (usually a sodium salt); sulphonated condensates of melamine formaldehyde (SMF); modified lignosulfonates (MLS); And the others. More recent superplasticizers include polycarboxylic compounds such as polycarboxylates, for example polyacrylates. Acrylic copolymer superplasticizers can also be used, preferably they are polymers comprising a chain with a possibly salified polycarboxylic function, to which another group (for example of the polycarboxylate or polyoxyethylene type) is attached.
  • SNF naphthalene formaldehyde
  • SMF sulphonated condensates of melamine formaldehyde
  • MLS modified lignosulfonates
  • More recent superplasticizers include polycarboxylic compounds such as polycarboxylates, for example polyacrylates. Acrylic copolymer
  • a superplasticizer is preferably a new generation superplasticizer, for example a copolymer containing a polyethylene glycol as a grafted chain and carboxylic functions in the main chain as a polycarboxylic ether.
  • Polycarboxylates such as polycarboxylate ether (PCE)
  • PCE polycarboxylate ether
  • the superplasticizer is a polycarboxylate, in particular an ether or a polycarboxylate ester.
  • the superplasticizers are polycarboxylates which have at least the following three units which are repeated: an acrylic unit, a methacrylic acid unit and a unit formed of a long chain of polyethers
  • High dispersion efficiency also makes it possible to reduce the amount of superplasticizer used and to have an economic benefit since the carboxylate product is relatively expensive.
  • Sodium polycarboxylate polysulfonates and sodium polyacrylates can also be used. Phosphonic acid derivatives and polycarboxylates having phosphate groups may also be used. Sodium polycarboxylate polysulfonates and sodium polyacrylates may also be used.
  • the amount of superplasticizer is highly dependent on the nature of the superplasticizer and its dilution; however, 100% solids content will be given.
  • the superplasticizing agent (expressed as dry extract) is generally present in an amount of between 0.01% and 3%, preferably between 0.1% and 2.5%, relative to the weight of the plaster.
  • the superplasticizer is usually added as a powder, but an addition in liquid form is also possible.
  • the addition in liquid form generally allows an automated dosage of additives.
  • the composition also includes a retarder.
  • a retarder One or more set retarders may be used.
  • Such retarders are, for example, carboxylic acids such as citric acid, sugars and their derivatives, polyoxymethylene amino acid calcium salt, degraded polyamides.
  • Delayers are used to obtain a setting time (between the beginning and the end of the shot) that is compatible with the desired application. Viscosifiers and thickeners may also be used, in particular to avoid segregation and / or bleeding.
  • biopolymers such as gums: diutane gum, guar gum, xanthan gum
  • precipitated silica or cellulose derivatives such as methylcellulose, methylhydroxypropylcellulose, hydroxyethylcellulose, carboxymethylcellulose
  • a dye pigment in the mortar for screed, especially at the level of the additive in its bag.
  • the amount of retarder is very dependent on the nature of the retarder and its dilution; however, 100% solids content will be given.
  • the retarding agent (expressed as dry extract) is generally present in an amount of between 0.01% and 3%, preferably between 0.05% and 2%, relative to the weight of plaster.
  • the amount of retarder will also be adjusted according to the ambient temperature: quantity to decrease when the ambient temperature increases.
  • the amount of retarder can be increased with respect to a formula comprising siliceous sand.
  • a formula comprising siliceous sand For example, at 40 ° C., 0.30%> retarder, based on the weight of plaster, with calcareous sand and 0.20%) retarder, based on the weight of plaster, with a siliceous sand can be used. .
  • the retarder is usually added as a powder, but addition in liquid form is also possible.
  • the addition in liquid form generally allows an automated dosage of additives.
  • the composition also comprises an antifoaming agent.
  • antifoaming agent is varied. It may especially be based on silicone, fatty alcohols, esters, polypropylene glycol.
  • the anti-foam agent may be chosen in the following classes:
  • Antifoam based on oil which has an oil as a vehicle.
  • This oil can be mineral, vegetable (except silicone).
  • the antifoam also comprises a wax and / or a hydrophobic silica.
  • waxes are ethylene bis stearamide (EBS), paraffin waxes, ester waxes and waxes based on fatty alcohols. Surfactants may also be present;
  • Antifoam powder These agents correspond to these oil-based agents but on a particulate support such as silica;
  • oils or waxes dispersed in an aqueous base.
  • the oils are white oils or vegetable oils and the waxes are fatty alcohols, fatty acids, esters or soaps thereof;
  • the agent antifoam may be a polydimethylsiloxane. Particularly suitable are silicones comprising (RSiOo, s) and (R 2 SiO) groups. In these formulas, the R radicals, which may be the same or different, are preferably a hydrogen atom or an alkyl group of 1 to 8 carbon atoms, the methyl group being preferred. The number of units is preferably from 30 to 120;
  • Anti-foam glycol type include polyethylene glycol and polypropylene glycol copolymers. They are available on oily or aqueous base or emulsions;
  • the amount of this agent is typically between 0.01% and 5%, preferably 0.11% and 5%, calculated with respect to the solids content of the superplasticizer.
  • the defoamer is usually added as a powder, but addition in liquid form is also possible.
  • the addition in liquid form generally allows an automated dosage of additives.
  • the composition further comprises an adjuvant chosen from setting accelerators, thickening agents, viscosity agents and / or water retenters, air entraining agents, anti-film agents, tracers, hydrophobing agents and coloring agents. and mixtures thereof, in particular viscosifiers and / or thickeners.
  • an adjuvant chosen from setting accelerators, thickening agents, viscosity agents and / or water retenters, air entraining agents, anti-film agents, tracers, hydrophobing agents and coloring agents. and mixtures thereof, in particular viscosifiers and / or thickeners.
  • the amount of water is adjusted to obtain the consistency and the mechanical strengths required for the application of the composition on site.
  • the amount of water is generally capable of being expressed relative to the binder, and the water / binder ratio is generally between 0.27 and 0.70, preferably between 0.35 and 0.70, advantageously between 0, 40 and 0.70.
  • the spreading values of the compositions according to the invention are conventional. In particular, they have a spread of at least 22 cm, preferably at least 24 cm, advantageously at least 25 cm.
  • the screed according to the invention generally meets the requirements of the European standards EN 13454-1 of February 2005 (binder), EN 13813 of June 2003 (mortar), and according to the test methods described in standard NF EN 13454-2 + A1 of September 2007 relating to binders and mortars based on calcium sulphate for fluid screeds.
  • the amount of binder, especially calcium sulphate, in the screed advantageously varies from 400 to 700 kg / m 3 , typically of the order of 650 kg / m 3 .
  • the binder is present in a customary amount, in particular to achieve and maintain the minimum qualities specified in the standards above.
  • the sands which are used in the formulation according to the invention are conventional aggregates in accordance with EN 12620 (sands for concrete).
  • the Dmax is less than 4 mm, and in general the sand has particle sizes substantially between 0 and 4 mm (which are generally referred to as 0-4 sands).
  • Sands include calcareous, siliceous and silico-calcareous materials.
  • the sand can be of different origins, alluvial washed (rolled, semi-crushed or crushed), sands of marine origin, crushed calcareous sand (dry or washed), sands of magmatic origin (porphyry, granite), aggregates of recycling resulting crushing concrete or other building materials
  • inertants are compounds that reduce or prevent the harmful effects of clays on the properties of hydraulic binders. Inerting clays include those described in FR 2 948 1 18, WO 2006/032785 and WO 2006/032786.
  • the sands are sands of calcareous or silico-calcareous nature, more preferably of limestone nature.
  • the screed composition comprises, per cubic meter of composition in the fresh state:
  • the screed composition advantageously comprises from 0.5 to 2.5% of superplasticizer, percentages expressed by weight of dry extract of superplasticizer relative to the weight of the plaster.
  • the screed composition advantageously comprises from 0.05 to 0.2% of retarder, percentages expressed by weight of dry extract of retarder relative to the weight of the plaster.
  • the screed composition advantageously comprises from 0.1 to 0.2% of CaO, percentages expressed by weight of retarder solids relative to the weight of the plaster.
  • the screed composition advantageously comprises from 0.01% to 0.5%, based on the dry extract of the superplasticizer, of an antifoaming agent.
  • the floor screed composition according to the invention has the advantage of being self-placing. It can easily be poured by means of a pump, for example a screw pump or a piston pump.
  • the compressive strengths are measured on cubic test pieces 15 ⁇ 15 ⁇ 15 cm after curing for two days at 20 ° C. and then after drying for several days at 45 ° C. maximum. Drying at 90 ° C in the long term would lead to dehydration of the gypsum and therefore a decrease in mechanical strength, so drying should be recommended at 40-45 ° C until the mass of the test piece is constant.
  • the force applied to the sample is increased at a rate of 3.85 kN / s during the test;
  • the principle of the spreading measurement consists in filling a truncated cone of spreading measurement with the hydraulic composition to be tested and then in releasing said composition from said truncated cone of spreading measurement so as to to determine the disc surface obtained when the hydraulic composition has finished spreading.
  • Viscosity measurement method (flow): The measurement of the viscosity consists in measuring the flow time of the hydraulic composition to be tested through a viscosity measurement truncated cone.
  • the viscosity measuring truncated cone has the following dimensions:
  • the viscosity measurement truncated cone further comprises first and second indicia which may be parallel marks provided on the wall of the truncated cone and defining planes perpendicular to the truncated cone axis.
  • the first mark is closer to the base of larger diameter than the second mark.
  • the distance between the two marks is 60 mm, the first mark being 12 mm from the larger diameter base.
  • the hydration reaction of the semi-hydrates is an exothermic reaction which will cause an increase in the temperature of the screeds. This increase in temperature will be recorded thanks to a TESTO temperature recorder.
  • the graph of the evolution of temperature as a function of time is plotted and the setting time is read at the abscissa where the peak of the curve is maximum.
  • Effective water is the water required for the hydration of a hydraulic binder and the fluidity of a hydraulic composition in the fresh state.
  • Total water represents all of the water present in the mixture (at the time of mixing) and includes the effective water and the water absorbed by the aggregates. Efficient water and its method of calculation are discussed in the EN 206-1 standard of October 2005, page 17, paragraph 3.1.30.
  • the amount of absorbable water is deduced from the absorption coefficient of the aggregates which is measured according to standard NF EN 1097-6 of June 2001 page 6 paragraph 3.6 and the associated appendix B.
  • the water absorption coefficient is the ratio of the mass increase of a sample of aggregates to its dry mass, the sample being initially dry and then immersed for 24 hours in water. The increase in mass is due to the penetration of water into the pores of the aggregates accessible to water.
  • Vinapor antifoam Vinapor ® DF9010, manufactured by BASF
  • PCE239 superplasticizer Melflux PCE239L, manufactured by
  • compositions based on calcareous sand are more economical.
  • the amount of admixture is less important (about 40% decrease) than with siliceous sand.
  • the mechanical strengths are also more important with the calcareous sand.
  • Example 3 Impact of the amount of binder The effect of varying the amount of binder was analyzed by not modifying the amount of water. The results are reported in the following table: 30 ° C
  • PCE 239 (% / plaster) 0.63 0.60 0.57 0.58
  • the sand is a cut 73/27 of sand 0 / 1.6 Cassis and sand 1.6 / 3 Cassis.
  • Plaster is a French plaster, Prestia 2500, crystalline form ⁇ .
  • the decrease in the amount of binder does not change the amount of water increases the ratio Eff / plaster and allows to make screeds that fall within the specifications at the level of rheology while reducing the amount of adjuvant.
  • the reduction in the amount of plaster reduces the mechanical resistance.
  • the formulator may vary the amount of binder by increasing it to increase the mechanical properties or by decreasing it to reduce the mechanical properties.
  • Example 4 Replacement of a part of the plaster with a load
  • the sand is a cut 73/27 of sand 0 / 1.6 Cassis and sand 1.6 / 3 Cassis.
  • Plaster is a French plaster, Prestia 2500, crystalline form ⁇ .
  • pH regulator CaO powder
  • a homogeneous product A self-placing product. Product appearance very correct after pouring. A nice finish after the passage of the "bar”.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
EP17724382.1A 2016-05-23 2017-05-23 Verwendung von pflaster zur herstellung einer selbstnivellierender unterlage für heisse länder Withdrawn EP3464213A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1654591A FR3051462A1 (fr) 2016-05-23 2016-05-23 Utilisation de platre pour la fabrication d'une chape fluide destinee aux pays chauds
PCT/EP2017/062326 WO2017202801A1 (fr) 2016-05-23 2017-05-23 Utilisation de platre pour la fabrication d'une chape fluide destinee aux pays chauds

Publications (1)

Publication Number Publication Date
EP3464213A1 true EP3464213A1 (de) 2019-04-10

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EP17724382.1A Withdrawn EP3464213A1 (de) 2016-05-23 2017-05-23 Verwendung von pflaster zur herstellung einer selbstnivellierender unterlage für heisse länder

Country Status (5)

Country Link
EP (1) EP3464213A1 (de)
CA (1) CA3025254A1 (de)
FR (1) FR3051462A1 (de)
MA (1) MA45085A (de)
WO (1) WO2017202801A1 (de)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3937431A1 (de) * 1989-11-10 1991-05-16 Knauf Westdeutsche Gips Verschleissschicht fuer nutzboeden
RU2388711C2 (ru) 2004-09-21 2010-05-10 Лафарж Способ нейтрализации примесей
PL1838643T3 (pl) 2004-09-21 2012-04-30 Lafarge Sa Mieszanki do zobojętniania zanieczyszczeń
DE202007003608U1 (de) * 2007-03-10 2008-07-24 Knauf Gips Kg Werktrockenmörtel zur Herstellung eines Schnellestrichs
FR2948118A1 (fr) 2009-07-17 2011-01-21 Coatex Sas Additif d'inertage des impuretes pour les suspensions aqueuses de sulfate de calcium hemihydrate contenant un polymere peigne et un polymere cationique
FR2995604B1 (fr) * 2012-09-17 2017-04-21 La Chape Liquide Nouvelle chape a base de liant hydraulique avec une conductivite thermique amelioree

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Publication number Publication date
FR3051462A1 (fr) 2017-11-24
WO2017202801A1 (fr) 2017-11-30
MA45085A (fr) 2019-04-10
CA3025254A1 (fr) 2017-11-30

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