EP1991510A2 - Mélanges de matériaux de construction additifs contenant des structures polymères gonflables - Google Patents

Mélanges de matériaux de construction additifs contenant des structures polymères gonflables

Info

Publication number
EP1991510A2
EP1991510A2 EP07704237A EP07704237A EP1991510A2 EP 1991510 A2 EP1991510 A2 EP 1991510A2 EP 07704237 A EP07704237 A EP 07704237A EP 07704237 A EP07704237 A EP 07704237A EP 1991510 A2 EP1991510 A2 EP 1991510A2
Authority
EP
European Patent Office
Prior art keywords
polymer structures
structures according
concrete
acid
building material
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Withdrawn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
EP07704237A
Other languages
German (de)
English (en)
Inventor
Holger Kautz
Jan Hendrik Schattka
Gerd LÖHDEN
Joachim Venzmer
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.)
Construction Research and Technology GmbH
Roehm GmbH Darmstadt
Original Assignee
Evonik Roehm GmbH
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 Evonik Roehm GmbH filed Critical Evonik Roehm GmbH
Publication of EP1991510A2 publication Critical patent/EP1991510A2/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Withdrawn legal-status Critical Current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
    • C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
    • C04B24/24—Macromolecular compounds
    • C04B24/26—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • 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
    • C04B16/00—Use of organic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of organic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B16/04—Macromolecular 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
    • C04B16/00—Use of organic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of organic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B16/04—Macromolecular compounds
    • C04B16/08—Macromolecular compounds porous, e.g. expanded polystyrene beads or microballoons
    • C04B16/085—Macromolecular compounds porous, e.g. expanded polystyrene beads or microballoons expanded in situ, i.e. during or after mixing the mortar, concrete or artificial stone ingredients
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
    • C04B2103/0045—Polymers chosen for their physico-chemical characteristics
    • C04B2103/0051—Water-absorbing polymers, hydrophilic polymers
    • 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
    • C04B2111/20—Resistance against chemical, physical or biological attack
    • C04B2111/29—Frost-thaw resistance

Definitions

  • the present invention relates to the use of polymeric microparticles in hydraulically setting building material mixtures to improve their Frostg. Freeze-thaw resistance.
  • the concrete has two time-dependent properties. First, it experiences a decrease in volume due to dehydration, which is called shrinkage. However, most of the water is bound as water of crystallization. Concrete does not dry, it binds, that is, the initially low-viscosity cement paste (cement and water) stiffens, solidifies and finally solidifies, depending on the timing and sequence of the chemical-mineralogical reaction of the cement with the water, the hydration. Due to the water-binding capacity of the cement, the concrete, in contrast to calcined lime, can also harden under water and remain firm. Second, concrete deforms under load, the so-called creep.
  • the frost-thaw cycle refers to the climatic change of temperatures around the freezing point of water.
  • the frost-thaw cycle is a damaging mechanism. These materials have a porous, capillary structure and are not waterproof. Will one, soaked in water Structure exposed to temperatures below 0 C, so the water freezes in the pores. Due to the density anomaly of the water, the ice now expands. This leads to damage to the building material. In the very fine pores due to surface effects, the freezing point is lowered. In micro pores, water only freezes below -M 0 C. Since the material itself also expands and contracts due to freeze-thaw cycles, there is an additional capillary pumping effect that further increases water absorption and thus indirectly the damage. The number of freeze-thaw cycles is therefore decisive for the damage.
  • the structure of a cement-bound concrete is traversed by capillary pores (radius: 2 ⁇ m - 2 mm) or gel pores (radius: 2 - 50 nm). Pore water contained therein differs in its state form depending on the pore diameter.
  • a prerequisite for an improved resistance of the concrete during frost and thaw changes is that the distance of each point in the cement stone from the next artificial air pore does not exceed a certain value. This distance is also referred to as the "distance factor” or “powers spacing factor” [TCPowers, The air requirement of frost-resistant concrete, "Proceedings of the Highway Research Board” 29 (1949) 184-202]. Laboratory tests have shown that exceeding the critical "Power spacing factor" of 500 ⁇ m leads to damage to the concrete during frost and thaw cycles. In order to achieve this with a restricted air-pore content, the diameter of the artificially introduced air pores must therefore be less than 200-300 ⁇ m [K.Snyder, K. Natesaiyer & K.Hover, The stereological and Statistical properties of entrained air voids in concrete: A mathematical basis for air void system characterization) "Materials Science of Concrete” VI (2001) 129-214].
  • an artificial air pore system depends largely on the composition and grain size of the aggregates, the type and amount of cement, the concrete consistency, the mixer used, the mixing time, the temperature, but also on the type and amount of the air entraining agent. Under consideration of the appropriate manufacturing rules, their effects can indeed be mastered, however, there may be a large number of undesired impairments, which ultimately leads to the desired air content in the concrete can be exceeded or fallen below and thus adversely affected the strength or frost resistance of the concrete ,
  • Such artificial air pores can not be metered directly, but by the addition of so-called air-entraining agents, the air introduced by mixing is stabilized [L. Du & K.J. Folliard, Mechanism of air entrainment in concrete "Cement & Concrete Research” 35 (2005) 1463-71].
  • Conventional air entraining agents are mostly of a surfactant-like structure and break the air introduced by the mixing into small air bubbles with a diameter as small as possible of 300 ⁇ m and stabilize them in the moist concrete structure. One distinguishes between two types.
  • These hydrophobic salts reduce the surface tension of the water and accumulate at the interface between cement grain, air and water. They stabilize the microbubbles and therefore find themselves in the hardening concrete on the surfaces of these air pores again.
  • the other type - eg sodium lauryl sulfate (SDS) or sodium dodecyl phenylsulfonate - forms with calcium hydroxide soluble calcium salts, but which show an abnormal solution behavior.
  • the content of fine substances in the concrete also affects the air entrainment. Also, interactions with defoaming agents can occur, which thus expel air voids, but also can introduce uncontrolled.
  • a relatively new way to improve the frost and freeze-thaw resistance is to achieve the air content by blending or metering polymeric microparticles (hollow microspheres) [H.Summer, A new method of making concrete resistant to frost and de-icing salts, "Concrete Plant & Precast Technology" 9 (1978) 476-84].
  • microparticles usually have particle sizes smaller than 100 ⁇ m, they can also be distributed finer and more uniformly than artificially introduced air pores in the concrete structure. As a result, even small amounts are sufficient for a sufficient resistance of the concrete against freezing and thawing.
  • the use of such polymeric microparticles to improve the frost and freeze-thaw resistance of concrete is already known according to the prior art [cf. DE 2229094 A1, US Pat. No. 4,057,526 B1, US Pat. No. 4,082,562 B1, DE 3026719 A1].
  • microparticles described therein are characterized in particular by the fact that they have a cavity which is smaller than 200 microns (diameter) and this hollow core consists of air (or a gaseous substance). This also includes porous microparticles of the 100 ⁇ m scale, which can have a multiple of smaller cavities and / or pores.
  • Sogennate superabsorbents have already been used occasionally in construction mixtures.
  • superabsorbents include hydrogel, polyelectrolyte gel, water-swellable polymer, water Absorbent polymer, superabsorbent material (SAM) or superabsorbent polymer (SAP) are understood as substances which can spontaneously and rapidly absorb large quantities of aqueous liquids.
  • SAM superabsorbent material
  • SAP superabsorbent polymer
  • the present invention was therefore based on the object to provide a means for improving the frost or freeze-thaw resistance for hydraulically setting building material mixtures, which unfolds its full effectiveness even at relatively low dosages and also easy and cheap to produce. Another object was to not or not significantly affect the mechanical strength of the building material by this means.
  • polymer structures are very inexpensive to produce compared to known microparticle systems. Their smaller size results in better dispersibility in the construction mix. This in turn leads to a much more homogeneous distribution of the polymer structures in the construction mixture, which automatically leads to a more favorable "Powers spacing factor.”
  • the polymer structures according to the invention also function as small water-retaining sponges which counteract the self-drying of the construction mixture. However, the associated significantly larger specific surface area, they release the bound water significantly faster to the surrounding construction mixture and their effectiveness in terms of frost or thaw-thawing resistance is therefore much faster available, resulting in a much better Weathering factor shows.
  • the swollen polymer structures are initially in the construction mixture as initially water-filled chambers distributed homogeneously.
  • the water is removed from the polymer structures by the surrounding matrix, leaving behind small air-filled chambers with the unswollen polymer structure.
  • the advantage according to the invention is manifested above all in the weathering factor, which represents a qualitative assessment of the optically visible frost damage on the surface of a sample.
  • the polymer structures according to the invention are microparticles, which are preferably prepared by emulsion polymerization and may contain further constituents. Without intending to limit the invention, these components may serve for stabilization and / or compatibilization.
  • the polymer structure includes at least one polymer based on at least one monoethylenically unsaturated monomer having an acid group.
  • the acid groups of the monomer used may be partially or completely, preferably partially neutralized.
  • DE 195 29 348 the disclosure of which is hereby incorporated by reference and is part of the disclosure.
  • Preferred monoethylenically unsaturated monomers having an acid group are acrylic acid, methacrylic acid, ethacrylic acid, ⁇ -chloroacrylic acid, ⁇ -cyanoacrylic acid, p-methylacrylic acid (crotonic acid), ⁇ -phenylacrylic acid, p-acryloxypropionic acid, sorbic acid, ⁇ -chlorosorbic acid, 2'-methylisocrotonic acid, cinnamic acid, p-chlorocinnamic acid, p-stearic acid, Itaconic acid, citraconic acid, mesaconic acid, glutaconic acid, aconitic acid, maleic acid, fumaric acid, tricarboxyethylene and maleic anhydride, hydroxyl- or amino-containing esters of the above acids, preferably of acrylic or methacrylic acid, such as.
  • this polymer can also be based on other comonomers other than the monoethylenically unsaturated monomer having an acid group.
  • Preferred comonomers are ethylenically unsaturated sulfonic acid monomers, ethylenically unsaturated phosphonic acid monomers and acrylamides.
  • Ethylenically unsaturated sulfonic acid monomers are preferably aliphatic or aromatic vinylsulfonic acids or acrylic or methacrylic sulfonic acids.
  • aliphatic or aromatic vinylsulfonic acids vinylsulfonic acid, allylsulfonic acid, 4-vinylbenzylsulfonic acid, vinyltoluenesulfonic acid and styrenesulfonic acid are preferred.
  • acrylic or methacrylic sulfonic acids preference is given to sulfoethyl acrylate, sulfoethyl methacrylate, sulfopropyl acrylate, sulfopropyl methacrylate, 2-hydroxy-3-methacryloxypropylsulfonic acid and 2-acrylamide-2-methylpropanesulfonic acid.
  • Ethylenically unsaturated phosphonic acid monomers such as vinylphosphonic acid, allylphosphonic acid, vinylbenzylphosphonic acid, acrylamidoalkylphosphonic acids, acrylamidoalkyldiphosphonic acids. Phonomonomethylated vinylamines, (meth) acrylicphosphonic acid derivatives.
  • Possible acrylamides are alkyl-substituted acrylamides or aminoalkyl-substituted derivatives of acrylamide or of methacrylamide, such as N-vinylamides, N-vinylformamides, N-vinylacetamides, N-vinyl-N-methylacetamides, N-vinyl-N-methylformamides, N-methylol (meth) acrylamide, vinylpyrrolidone, N, N-dimethylpropylacrylamide, dimethylacrylamide or diethylacrylamide and the corresponding methacrylamide derivatives and acrylamide and methacrylamide, with acrylamide being preferred.
  • ethylenically unsaturated monomers include, among others, nitriles of (meth) acrylic acid and other nitrogen-containing methacrylates, such as methacryloylamidoacetonitrile, 2-methacryloyloxyethylmethylcyanamide, cyanomethylmethacrylate; carbonyl-containing methacrylates, such as oxazolidinylethyl methacrylate, N- (methacryloyloxy) formamide, acetonyl methacrylate, N-methacryloylmorpholine, N-methacryloyl-2-pyrrolidinone; Glycol dimethacrylates such as 1,4-butanediol methacrylate, 2-butoxyethyl methacrylate, 2-ethoxyethoxymethyl methacrylate, 2-ethoxyethyl methacrylate, methacrylates of ether alcohols such as tetrahydrofurfury
  • Vinyl esters such as vinyl acetate
  • Styrene substituted styrenes having an alkyl substituent in the side chain, such as.
  • Heterocyclic vinyl compounds such as 2-vinylpyridine, 3-vinylpyridine, 2-methyl-5-vinylpyridine, 3-ethyl-4-vinylpyridine, 2,3-dimethyl-5-vinylpyridine, vinylpyrimidine, vinylpiperidine, 9-vinylcarbazole, 3-vinylcarbazole, 4-vinylcarbazole, 1-vinylimidazole, 2 methyl-1-vinylimidazole, INI vinylpyrrolidone, 2-vinylpyrrolidone, N-vinylpyrrolidine, 3-vinylpyrrolidine, N-vinylcaprolactam, N-vinylbutyrolactam, vinyloxolane, vinylfuran, vinylthiophene, vinylthiolane, vinylthiazoles and hydrogenated vinylthiazoles, vinyloxazoles and hydrogenated vinyloxazoles;
  • Maleic acid derivatives such as diesters of maleic acid, wherein the alcohol radicals have 1 to 9 carbon atoms, maleic anhydride, methylmaleic anhydride, maleimide, methylmaleimide;
  • Fumaric acid derivatives such as diesters of fumaric acid, wherein the alcohol radicals have 1 to 9 carbon atoms; ⁇ -olefins such as ethene, propene, n-butene, i-butene, n-pentene, i-pentene, n-hexene, i-hexene; Cyclohexene.
  • the steric repulsion of the polymer structures can be realized by appropriate monomers. This leads to an additional stabilization of the polymer structures in the dispersion and the construction mixture.
  • Radically polymerizable monomers having a molecular weight greater than 200 g / mol and carrying a hydrophilic radical can therefore also be used according to the invention. be used. Particularly preferred are monomers which carry a polyethylene oxide block having two or more units of ethylene oxide.
  • the crosslinking can take place both during the preparation of the polymer structures and afterwards.
  • the first crosslinking is carried out by a chemical crosslinker or by thermal crosslinking or radiation crosslinking or mixtures thereof, wherein the treatment by a chemical crosslinker is preferred. It serves to stabilize the microparticles and is the basic requirement for swellability.
  • the chemical crosslinking is achieved by crosslinking agents well known to those skilled in the art.
  • crosslinkers are preferably used in an amount of less than 20, more preferably less than 10, and most preferably less than 5 weight percent, based on the total weight of the monomers employed.
  • Crosslinkers preferred according to the invention are polyacrylic or polymethacrylic acid esters which are obtained, for example, by the reaction of a polyol or ethoxylated polyol such as ethylene glycol, propylene glycol, trimethylolpropane, 1,6-hexanediolglycerol, pentaerythritol, polyethylene glycol or polypropylene glycol with acrylic acid or methacrylic acid. It is also possible to use polyols, amino alcohols and theirs mono (meth) acrylic esters and monoallyl ethers. Furthermore, acrylic acid esters of the monoallyl compounds of the polyols and amino alcohols are also suitable.
  • crosslinkers are obtained by the reaction of polyalkylene polyamines such as diethylene triamine and triethylene tetraamine methacrylic acid or methacrylic acid.
  • Suitable crosslinkers are 1, 4-butanediol diacrylate, 1,4-butanediol dimethacrylate, 1,3-butylene glycol diacrylate, 1,3-butylene glycol dimethacrylate, diethylene glycol diacrylate, diethylene glycol dimethacrylate, ethoxylated bisphenol A diacrylate, ethoxylated bisphenol A dimethacrylate, ethylene glycol dimethacrylate, 1 , 6-hexanediol diacrylate, 1, 6-hexanediol dimethacrylate, neopentyl glycol dimethacrylate, polyethylene glycol diacrylate, polyethylene glycol dimethacrylate, triethylene glycol diacrylate, triethylene glycol dimethacrylate, tripropylene glycol diacrylate, tetraethylene glycol diacrylate, tetraethylene glycol diacrylate, tetraethylene glycol dimethacrylate, dipentaerythritol
  • crosslinking agents are N, N'-methylenebisacrylamide, N, N'-methylenebismethacrylamide 1 of polyethylene glycol diacrylate, polyethylene glycol dimethacrylate and triallyl amine.
  • a subsequent networking can take place. This is done via the acid groups and allows a functionalization of the surface of the polymer structure (intramolecular reaction) or leads to covalent linkage of individual polymer structures (intermolecular reaction). The former leads to a compaction of the surface and reduces the number of free acid groups on the surface. This is advantageous in order to be able to set an optimal interaction with the matrix of the construction mixture.
  • crosslinkers are preferably used in an amount of less than 30, more preferably less than 15, and most preferably less than 10 weight percent, based on the total weight of the monomers employed.
  • postcrosslinkers are organic carbonates, polyquaternary amines, polyvalent metal compounds and compounds which have at least two functional groups which can react with carboxyl groups of the polymer structure.
  • polyols and amino alcohols such as ethylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, polyethylene glycol, glycerol, polyglycerol, propylene glycol, ethanolamine, diethanolamine, triethanolamine, propanolamine, polyoxypropylene, oxyethylene-oxypropylene block polymers, sorbitan fatty acid esters, polyoxyethylene sorbitan fatty acid esters, trimethylolpropane terephthalite, polyvinyl alcohol and sorbitol, polyglycidyl ether compounds such as ethylene glycol diglycidyl ether, polyethylene glycol diglycidyl ether, glycerol diglycidyl ether, g
  • polyvalent metal compounds such as salts, polyquaternary amines such as condensation products of dimethylamines and epichlorohydrin, homo- and copolymers of Diallyldimethylamoniumchlorid and homopolymers and copolymers of
  • Diethylallylamino (meth) acrylatmethylchloridamoniumsalzen are preferably diethylene glycol, triethylene glycol, polyethylene glycol, glycerin, polyglycerol, propylene glycol, diethanolamine, triethanolamine, polyoxypropylene, oxyethylene-oxypropylene block copolymer, sorbitan fatty acid esters, polyoxyethylene sorbitan fatty acid esters, trimethylolpropane, petereritrite, polyvinyl alcohol, sorbitol, alkylene carbonates such as 1,3-dioxolan-2-one, 1, 3-dioxolan-2-one, 4-methyl-1,3-dioxolan-2-one, 4,5,5-dimethyl-1,3-dioxolan-2-one, 4,4-dimethyl-1, 3-dioxolan-2-one, 4-ethyl-1,3-dioxolan-2-one, hydroxymethyl-1
  • Polyoxazolines such as 1, 2-Ethylenbisoxazoline, crosslinkers with silane groups such as ⁇ -glycidoxypropyltrimethoxysilane and ⁇ -aminopropyltrimethoxysilane, oxazolidinones such as 2-oxazolidinone, bis and poly-2-oxazolidinone, diglycol silicates.
  • silane groups such as ⁇ -glycidoxypropyltrimethoxysilane and ⁇ -aminopropyltrimethoxysilane
  • oxazolidinones such as 2-oxazolidinone, bis and poly-2-oxazolidinone
  • diglycol silicates ethylene carbonate is particularly preferred.
  • water-soluble polymers can be used for additional stabilization.
  • water-soluble homopolymers or copolymers of the abovementioned monomers such as polyacrylic acid, partially saponified polyvinyl acetate, polyvinyl alcohol, polyalkylene glycol, starch, starch derivatives, graft-polymerized starch, cellulose and cellulose derivatives such as caboxymethylcellulose, hydroxymethylcellulose and galactomannans and its alkoxylated derivatives.
  • the swelling of the polymer structures is carried out by bases.
  • the swelling is synonymous with a deprotonation of the acid groups in the polymer structure.
  • the swelling can take place during the emulsion polymerization, then in the dispersion and / or the builder mixture known to the person skilled in the art as basic.
  • Suitable bases are in addition to the construction mixture, the alkali metal hydroxides, ammonia and the aliphatic primary and secondary amines and alkali metal carbonates and alkali metal bicarbonates.
  • the alkali hydroxides are preferably sodium hydroxide and potassium hydroxide and also NH 3 , NH 4 OH and soda.
  • the polymer structures according to the invention can preferably be prepared by emulsion polymerization and preferably have an average particle size of 10 to 10,000 nm; particularly preferred is an average particle size of 50 to 5,000 nm. Most preferred are average particle sizes of 80 to 1,000 nm.
  • any ionic or nonionic emulsifier can be used during or after the dispersion is prepared.
  • the microparticles are obtained in the form of an aqueous dispersion. Accordingly, the addition of the microparticles to the building material mixture preferably also takes place in this form.
  • the first property is mainly determined by large, especially by the prior art known polymer structure, the latter caused by the polymer structures of the invention.
  • a preferred system is achieved by mixtures of polymer structures having a diameter between 10 nm and 500 ⁇ m, wherein at least one of the types of polymer structures contained in the mixture has a diameter of less than 1000 nm.
  • the mean particle size is determined, for example, by counting a statistically significant amount of particles on the basis of transmission electron micrographs.
  • the polymer structures are added to the building material mixture in a preferred amount of 0.01 to 5% by volume, in particular 0.1 to 0.5% by volume.
  • the building material mixture - for example in the form of concrete or mortar - can here the usual hydraulically setting binder such.
  • cement lime, gypsum or anhydrite.
  • the air can be kept extremely low in the building material mixture.

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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)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

L'invention concerne l'utilisation de structures polymères pouvant être gonflées avec des bases, dans des mélanges de matériaux de construction à prise hydraulique, afin d'améliorer la résistance au gel ou au gel/dégel desdits matériaux.
EP07704237A 2006-03-01 2007-01-30 Mélanges de matériaux de construction additifs contenant des structures polymères gonflables Withdrawn EP1991510A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006009841A DE102006009841A1 (de) 2006-03-01 2006-03-01 Additive Baustoffmischungen mit quellbaren Polymergebilden
PCT/EP2007/050885 WO2007099006A2 (fr) 2006-03-01 2007-01-30 Mélanges de matériaux de construction additifs contenant des structures polymères gonflables

Publications (1)

Publication Number Publication Date
EP1991510A2 true EP1991510A2 (fr) 2008-11-19

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EP07704237A Withdrawn EP1991510A2 (fr) 2006-03-01 2007-01-30 Mélanges de matériaux de construction additifs contenant des structures polymères gonflables

Country Status (11)

Country Link
US (1) US20070208109A1 (fr)
EP (1) EP1991510A2 (fr)
JP (1) JP2009528243A (fr)
KR (1) KR20080102143A (fr)
CN (1) CN101028971A (fr)
BR (1) BRPI0708309A2 (fr)
CA (1) CA2643941A1 (fr)
DE (1) DE102006009841A1 (fr)
MX (1) MX2008011031A (fr)
RU (1) RU2008138642A (fr)
WO (1) WO2007099006A2 (fr)

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BRPI0708309A2 (pt) 2011-05-24
MX2008011031A (es) 2008-09-08
CA2643941A1 (fr) 2007-09-07
JP2009528243A (ja) 2009-08-06
DE102006009841A1 (de) 2007-09-06
KR20080102143A (ko) 2008-11-24
RU2008138642A (ru) 2010-04-10
US20070208109A1 (en) 2007-09-06
WO2007099006A3 (fr) 2007-11-01
CN101028971A (zh) 2007-09-05

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