EP3596025A1 - Agent de cure pour formulation cimentaire - Google Patents
Agent de cure pour formulation cimentaireInfo
- Publication number
- EP3596025A1 EP3596025A1 EP18714574.3A EP18714574A EP3596025A1 EP 3596025 A1 EP3596025 A1 EP 3596025A1 EP 18714574 A EP18714574 A EP 18714574A EP 3596025 A1 EP3596025 A1 EP 3596025A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cementitious formulation
- mol
- water
- cement
- cementitious
- 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
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
- C04B28/02—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
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/0045—Polymers chosen for their physico-chemical characteristics
- C04B2103/0051—Water-absorbing polymers, hydrophilic polymers
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- 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
- C04B2103/46—Water-loss or fluid-loss reducers, hygroscopic or hydrophilic agents, water retention agents
Definitions
- the present invention finds application in the field of building and construction. More particularly, the invention relates to cementitious preparations incorporating a curing agent for reducing the water loss by evaporation of said preparations.
- US Patent 5143780 discloses a cement or concrete composite comprising a layer of cement or concrete and at least one outer layer consisting of a curing composition comprising cellulose fibers, water, a viscosity improving polymer and a hygroscopic swelling agent.
- US Patent 8404040 discloses a method for curing a cement or concrete which consists in applying to the surface of the cement or concrete an emulsion comprising, inter alia, a paraffin hydrocarbon wax and a saponifiable wax.
- FR-A-2726264 discloses a curing agent for a cementitious composition, essentially comprising a water-soluble polyalkylene oxide and a superabsorbent material.
- a curing agent comprising 0.56% by weight of polyethylene oxide of molecular weight 4 000 000 is incorporated in a cement at a rate of not more than 1.5% by weight of the cement, with a water / cement ratio equal to 0.5 or 0.54.
- the mass of polyethylene oxide relative to the mass of water present in the cement is therefore at most 0.017%.
- the patent application FR-A-2 975 096 describes a method for curing a concrete element, comprising at least partially covering the concrete element with a curing composition comprising from 40% to 99.9% by weight. mass of a solvent and from 0.1% to 5% by weight, expressed as solids, of a thickening agent (typically a gelling agent), which is insoluble in the solvent for a pH greater than 12 and which is soluble in the solvent for a pH range having an upper limit which is less than 11.
- a thickening agent typically a gelling agent
- the invention thus relates, in a first aspect, to the use of a polymer having a molar mass in the range of about 50,000 g / mol to about 6,000,000 g / mol, selected from polyethylene oxide, a cellulosic derivative, a polyvinyl alcohol or a mixture of these compounds, as a water evaporation reducing agent of a cementitious formulation comprising a hydraulic binder consisting of a cement and optionally one or more mineral additions, aggregates and water, said polymer being used in a proportion of about 0.1% to about 10% by weight relative to the water body of the cementitious formulation.
- the invention also relates, in another aspect, to a cementitious formulation comprising:
- the hydraulic binder used in the context of the present invention is a finely ground mineral material comprising a cement and optionally one or more mineral additions and which, mixed with water, hardens as a result of reactions and hydration processes.
- the hydraulic binder is advantageously in pulverulent form with a particle size such that at least 90% of the particles pass through a sieve of 200 ⁇ m (D 90 ⁇ 200 ⁇ m).
- the cementitious formulation comprises from about 100 kg to about 800 kg, preferably from about 100 kg to about 300 kg, more preferably from about 150 kg to about 300 kg of hydraulic binder per cubic meter of cementitious formulation.
- the cement is typically a cement based on Portland clinker such as those defined in the EN 197-1 standard, or a sulfo-aluminous cement.
- the mineral additions may be ground granulated blast furnace slags such as those defined in the EN 15167-1 standard, fly ash for concrete such as those defined in the EN 450-1 standard, silica fumes for concrete such as those defined in the EN 13263-1 standard, metakaolins for concrete such as those defined in the draft standard NF P 18-513, limestone additions such as those defined in standard NF P 18-508, siliceous additions such as those defined in NF P 18-509, any other finely divided mineral compound having binding properties in the cementitious formulation of the invention, or any mixture of the aforementioned constituents.
- the mineral additions are used in proportions such that their mass ratio to the cement is advantageously between about 0.1 / 1 and about 4/1, preferably between about 0.1 / 1 and about 3/1.
- the aggregates used in the context of the present invention are natural, artificial or recycled granular materials of mineral origin, as defined in the standard (s) EN 12620 and / or EN 13055-1; these are typically sands or chippings, whose diameter of the largest granulate is less than 25 mm.
- the cementitious formulation comprises from about 500 kg to about 2000 kg, preferably from about 1000 kg to about 2000 kg, granules per cubic meter of cementitious formulation.
- the polymer used in the context of the present invention has a molar mass in the range of about 50,000 g / mol to about 6,000,000 g / mol, preferably in the range of about 100,000 g / mol to about 5,000,000 g / mol, of more preferably in the range of about 100,000 g / mol to about 4,000,000 g / mol, more preferably in the range of about 100,000 g / mol to about 3,000,000 g / mol, more preferably in the range of range from about 100,000 g / mol to about 1,000,000 g / mol.
- the cementitious formulation comprises from about 0.1% to about 10% by weight, preferably from about 0.1% to about 5% by weight, more preferably from about 0.5% to about 5% by weight.
- the polymer is a mixture of one or more of the above-mentioned compounds (polyethylene oxide, cellulose derivative, polyvinyl alcohol); in this embodiment, the total amount of polymers used should be in the above range (about 0.1% to about 10% by weight of the water body).
- the polymer is a polyvinyl alcohol.
- the cellulose derivative is hydroxypropyl methylcellulose.
- cementitious formulation means a fresh cementitious formulation, that is to say a formulation such as obtained after mixing the various constituents of the component, before drying and / or setting.
- the cementitious formulation may also comprise one or more additives, in particular fibers and / or organic compounds making it possible to modify the consistency of the formulation, such as viscosity agents (XP P 18-). 340), setting or hardening accelerators, setting retarders, plasticizers or superplasticizers. These can be defined in EN 934-2.
- Superplasticizers may especially be of the family of polycarboxylates, polynaphthalenesulphonates, melamine sulphonates or lignosulphonates. As examples of superplasticizer, mention may be made of those sold under the name GLENIU®, the name CHRYSOFLUID®, the name VISCOCRETE® or the name MAPEFLUID®.
- Viscosity agents are colloidal compounds consisting of long chains of polymers that adhere to the periphery of water molecules and adsorb some of this water.
- viscosity agent mention may be made of those sold under the name RHEOMAC®, the name CHRYSO®Plast V90, the name V-AR® 3 or the name VISCOSTAR 3K.
- the fibers that can be used in the context of the present invention are steel fibers or polymer fibers such as those defined in the standards EN 14889-1 and EN 14889-2.
- the mass proportion of additives, relative to the hydraulic binder is preferably at most about 10%, and is preferably in the range of about 1% to about 5%.
- the cementitious formulation according to the invention can be manufactured in a conventional manner by mixing the various constituents with the aid of a kneader provided for this purpose.
- the constituents necessary for making the cementitious formulation according to the invention may also be in the form of a dry premix to which water will be added on the site itself.
- the invention relates to a dry premix for cementitious formulation, composed of a hydraulic binder, granulates, a polymer having a molar mass in the range of about 50,000 g / mol at about 6,000,000 g / mol, and possibly additives.
- the various constituents of the premix are as defined above with reference to the cementitious formulation, and are used in the proportions necessary for the production of a cementitious formulation according to the invention after addition of water.
- a non-toxic / dangerous material (the polymer) is used
- the cementitious formulation especially concrete, can be applied on vertical surfaces (wall).
- the aqueous polymer solution was previously prepared by dispersing said polymer in water with stirring for about 24 hours.
- the reference mortar was prepared by mixing water, sand and cement in a mixer.
- the amounts indicated in Table 1 are percentages by weight (except of course the polymer / water ratio).
- the sand used is a sand of granulometry 1-4 mm (Sablière Palvadeau Les Douemes).
- the cement used is a Portland cement equivalent to a cement NF EN 197-1 type 1 (St Vigor-Le Havre).
- the polymers used are the following:
- PEO polyethylene oxide (with molar mass in g / mol) marketed by Sigma Aldrich
- HPMC hydroxypropyl methylcellulose (with molar mass in g / mol) marketed by Dow Chemical Company
- PVA polyvinyl alcohol (with molar mass in g / mol) marketed by Sigma Aldrich.
- the percentage of evaporation of water at 12h was calculated from the mortars prepared in Example 1 by measuring the water loss of these mortars according to the protocol below.
- a cylinder 7 cm high and 4 cm in diameter was filled manually with the various prepared mortars. Light manual shocks were enough to make to go up the bubbles.
- the cylinder has been placed on a weigh scale which records the mass every minute.
- the assembly was placed in a 50x70cm section channel fed by a dry air face at a fixed flow rate of 40 liters / minute. The loss of water was noted at 12h. The results are collated in Table 2.
- the evaporation of water is significantly reduced with the mortars of the invention compared to the reference mortar and comparative mortar, the latter comprising 0.05% by weight of polymer relative to the mass of water.
- the amounts shown in Table 3 are percentages by weight (except of course the polymer / water ratio).
- the sand used is a sand of granulometry 1-4 mm (Sablière Palvadeau Les Douemes).
- the cement used is a sulfo-aluminous cement marketed by Vicat under the name Schleat TM.
- the polymer used is a polyvinyl alcohol (PVA), with molar mass in g / mol, marketed by Sigma Aldrich.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1752101A FR3064000B1 (fr) | 2017-03-15 | 2017-03-15 | Agent de cure pour formulation cimentaire |
PCT/FR2018/050605 WO2018167425A1 (fr) | 2017-03-15 | 2018-03-14 | Agent de cure pour formulation cimentaire |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3596025A1 true EP3596025A1 (fr) | 2020-01-22 |
Family
ID=59253642
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP18714574.3A Pending EP3596025A1 (fr) | 2017-03-15 | 2018-03-14 | Agent de cure pour formulation cimentaire |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3596025A1 (fr) |
FR (1) | FR3064000B1 (fr) |
WO (1) | WO2018167425A1 (fr) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113620652B (zh) * | 2021-09-02 | 2022-12-09 | 龙岩市龙岩学院科技有限公司 | 一种改性防水混凝土及其制备方法 |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5143780A (en) | 1985-06-12 | 1992-09-01 | Balassa Leslie L | Hydrated fibrous mats for use in curing cement and concrete |
CH686780A5 (de) * | 1992-07-22 | 1996-06-28 | Sandoz Ag | Fliessfaehige Zementmischungen. |
DE69431645T2 (de) * | 1993-09-08 | 2003-07-10 | Mbt Holding Ag, Zuerich | Zementzusammensetzungen zum schichtförmigen Aufbringen |
GB9421984D0 (en) * | 1994-11-01 | 1994-12-21 | Sandoz Ltd | Improvements in or relating to organic compounds |
US7815731B2 (en) * | 2006-06-13 | 2010-10-19 | Sekisui Specialty Chemicals America, Llc | Polyvinyl alcohol fluid loss additive with improved rheological properties |
FR2919602B1 (fr) * | 2007-07-30 | 2010-09-17 | Francais Ciments | "melange d'adjuvants modificateurs de rheologie pour beton autoplacant et beton autoplacant renfermant un tel melange" |
FR2938532B1 (fr) * | 2008-11-14 | 2011-08-12 | Lafarge Sa | Utilisation d'au moins un ether de cellulose pour reduire le retrait et/ou la fissuration plastique dans le beton |
US8404040B2 (en) | 2009-07-07 | 2013-03-26 | Momentive Specialty Chemicals Inc. | Curing or sealing compositions for concrete and cement formulations and processes for using the same |
FR2975096B1 (fr) | 2011-05-10 | 2014-07-04 | Lafarge Sa | Procede de cure d'un beton permeable |
FR2980790B1 (fr) * | 2011-10-04 | 2014-01-31 | Lafarge Sa | Sac et son utilisation pour adjuvanter une composition hydraulique |
EP3106446A1 (fr) * | 2015-06-18 | 2016-12-21 | Eidgenössische Materialprüfungs- und Forschungsanstalt EMPA | Éléments en béton armé auto-précontraint |
-
2017
- 2017-03-15 FR FR1752101A patent/FR3064000B1/fr active Active
-
2018
- 2018-03-14 EP EP18714574.3A patent/EP3596025A1/fr active Pending
- 2018-03-14 WO PCT/FR2018/050605 patent/WO2018167425A1/fr unknown
Also Published As
Publication number | Publication date |
---|---|
WO2018167425A1 (fr) | 2018-09-20 |
FR3064000B1 (fr) | 2022-09-09 |
FR3064000A1 (fr) | 2018-09-21 |
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