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WO2016173885A1 - Agent et procédé pour sceller des surfaces dans le cadre de travaux publics - Google Patents

Agent et procédé pour sceller des surfaces dans le cadre de travaux publics Download PDF

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Publication number
WO2016173885A1
WO2016173885A1 PCT/EP2016/058633 EP2016058633W WO2016173885A1 WO 2016173885 A1 WO2016173885 A1 WO 2016173885A1 EP 2016058633 W EP2016058633 W EP 2016058633W WO 2016173885 A1 WO2016173885 A1 WO 2016173885A1
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Prior art keywords
mixture
weight
component
composition
water
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Application number
PCT/EP2016/058633
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German (de)
English (en)
Inventor
Asendorf KNUT
Wolfgang Jarre
Original Assignee
Wormser Patentverwertungs Kg
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Publication date
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Publication of WO2016173885A1 publication Critical patent/WO2016173885A1/fr

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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
    • C04B28/001—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 unburned clay
    • 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
    • C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
    • C04B20/10—Coating or impregnating
    • C04B20/1018—Coating or impregnating with organic materials
    • C04B20/1022—Non-macromolecular compounds
    • C04B20/1025—Fats; Fatty oils; Ester type waxes; Higher fatty acids; Derivatives thereof
    • 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
    • C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
    • C04B20/10—Coating or impregnating
    • C04B20/1018—Coating or impregnating with organic materials
    • C04B20/1029—Macromolecular compounds
    • C04B20/1033—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
    • 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
    • C04B28/10—Lime cements or magnesium oxide 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
    • 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
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00034—Physico-chemical characteristics of the mixtures
    • C04B2111/00146—Sprayable or pumpable 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
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
    • C04B2111/00612—Uses not provided for elsewhere in C04B2111/00 as one or more layers of a layered structure
    • 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
    • C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials

Definitions

  • the present invention relates to various means and methods for sealing surfaces in civil engineering.
  • a mixture of substances for the formation of sealed surfaces in civil engineering is described, this mixture comprising a framework component A and a binder component B.
  • composition for the formation of sealed surfaces in civil engineering which has a proportion of the aforementioned mixture in admixture with water. Furthermore, a manufacturing method for the aforementioned composition is described, as well as a method for the formation of sealed surfaces in civil engineering using this mass.
  • German Utility Model DE 91 12 500 describes a sealing mat for insulating soil against liquids, wherein an aerofoil is provided between two outer layers of fiber material, in which a powder of mineral sealing material is introduced.
  • a sealing mat for insulating soil against liquids, wherein an aerofoil is provided between two outer layers of fiber material, in which a powder of mineral sealing material is introduced.
  • the production of such sealing mats is quite expensive, and in the sealing of surfaces, the sealing mat must still be cut suitable.
  • the covering layer proposed here must also be produced in advance in advance, by first producing a fiber mass into which a clay mineral is then incorporated, for which purpose the previously produced fiber mass must be stretched elaborately in order to produce openings into which the clay mineral can penetrate.
  • German Patent Application DE 3406617 which describes water-impermeable compositions which are produced by mixing at least 90% by weight of sand with up to 10% by weight of montmorillonite and up to a density of at least 1 , 6 g / cm 3 and then bringing the compressed mixture with salt water in contact until all exchangeable sites of montmorillonite are occupied by sodium ions. Then the product must then be washed with water until the wash water is substantially free of sodium. For the formation of watertight sealed surfaces by this method, therefore, a number of complex process steps are carried out and the execution of the method considerable amounts of salt water and pure wash water are required. In addition, both the salt water used and the wash water must ultimately be disposed of properly due to the significant amounts of sodium ions.
  • a further alternative solution is DE 199 32 909, in which a dry mixture is proposed for producing a watertight layer which comprises 60 to 90% by weight lignite fly ash, 10 to 40% by weight cement and a fraction of up to 1% by weight. contains powdered Methylcel- luloseitati. From this dry mixture can be e.g. Produce garden ponds by adding a dry mixture of water and a plastic mixture to be applied to the substrate.
  • the use of substantial amounts of cement, as proposed in this patent application is not entirely unproblematic in that cementitious systems such as these generally tend to be more prone to crack formation in the material, which increases significantly over the life of the surface seal.
  • framework component A consisting of quartz sand with a grain size in
  • binder component B consisting of a mixture of clay and a quartzitic mineral, the quartzitic mineral having a particle size in the range of 0.002 mm-0.063 mm, and the mixture having a proportion of 0.01-1, 0 wt .-% of a crosslinking agent, wherein the crosslinking agent of
  • surfactant component C 0.001-0.01% by weight of surfactant component C.
  • the substance mixture according to the invention is composed of the framework component A, the binder component B and the surfactant component C.
  • frame component in this context is to be understood as meaning that this component imparts structure and mechanical stability to the layer produced from the substance mixture according to the invention
  • binder component expresses that the component designated here is responsible, in particular, for the components of the framework component being held together and firmly connected to one another.
  • surfactant component is provided in the composition to reduce the surface tension of the water as soon as the composition comes into contact with water.
  • the advantage of the present invention is that with the mixture according to the invention with little effort, a mass can be produced with the permanently watertight sealed surfaces in civil engineering, especially in hydraulic engineering and underground mining, can be produced, which has a high mechanical strength and a particularly have long durability.
  • One of the essential advantages of the layers produced with the mixture according to the invention is that, in contrast to, for example, cement-bonded systems, they do not tend to crack, even with a long service life and strong weathering stresses.
  • the binder component B present in the substance mixture according to the invention leads to a change in the surface properties of the framework component A consisting of quartz sand.
  • the function of the crosslinking agent which on the one hand is the particulate one, is decisive here
  • Components of the binder component B interconnects, on the other hand, but in particular also the particulate constituents of the binder component B with the quartz grains of the framework component A connects and thus produces quartz grains with altered surface properties.
  • This effect is enhanced by the surfactant component C, which has the function to reduce the surface tension of water in contact with the substance mixture.
  • the framework component A consists according to the invention of quartz sand with a particle size in the range of 0.063 to 2 mm.
  • quartz sand here refers to sands having a SiO 2 content of at least 95% by weight.
  • the SiO 2 content is preferably at least 98% by weight, at least 99% by weight or even 100% by weight.
  • the quartz sand is dried quartz sand.
  • the drying of quartz sand for purposes of the present invention is effected by hot air at a temperature in the range of 400 to 500 ° C.
  • the quartz sands used in the invention are wet-processed quartz sands.
  • the quartz sand used according to the invention has a particle size (equivalent diameter) in the range from 0.063 to 2 mm, preferably the mean particle size is in the range from 0.25 to 1.75 mm In certain embodiments, the mean grain size is in the range of 0.5 to 1.5 mm.
  • grain size is understood to mean the “average grain size”, the term “average grain size” in the context of the present invention being understood to mean the statistical mean value of the volume-equivalent spherical diameter of the grains examined referred to as.
  • the binder component B shows the binding effect required according to the invention due to the special mixture of clay and quartzitic mineral, wherein the quartzitic mineral has a particle size of ⁇ 0.063 mm, and by the combination with a proportion (based on the total weight of the binder component B) of 0, 01 to 1, 0 wt .-% crosslinking agent, wherein at In certain embodiments, the binder component B contains from 0.01% to 0.1% by weight of crosslinking agent.
  • clay refers to a naturally occurring granular material having a mean grain size in the range of ⁇ 0.002 mm
  • AIPEA Association Internationale pour L'Etudes Des Argiles
  • CMS Clay Minerals Society
  • a clay consisting of at least 50% by weight of layered silicates is used.
  • clays are used according to the invention consisting of at least 60 wt .-%, at least 70 wt .-%, at least 80 wt .-%, at least 90 wt .-% or even at least 96 wt .-% of phyllosilicates.
  • sheet silicates refers to silicates whose silicate anions consist of layers of corner-sharing Si0 4 tetrahedra. These layers or bilayers are not linked to each other by further Si-O bonds to scaffolds. Examples of such phyllosilicates include, but are not limited to, the present invention in any form, nitro, montmorillonite or kaolinite.
  • the clay used according to the invention has a mean grain size (equivalent diameter) of at most 0.002 mm.
  • the mean grain size of the clay used in the invention in the range of 0.1 to 0.5 ⁇ . More preferably, the mean grain size is in the range of 0.15 to 0.45 ⁇ m.
  • the clay employed is dried clay.
  • the clay content of the binder component B can - depending on the specific application - at least 20 wt .-%, at least 30 wt .-%, at least 40 wt .-%, at least 50 wt .-%, at least 80 wt .-% , at least 90% by weight, at least 95% by weight or even up to 99% by weight.
  • the proportion of quartzitic mineral on the binder component B can - depending on the specific application - at most 80 wt .-%, at most 70 wt .-%, at most 60 wt .-%, at most 50 wt .-%, at most 20 wt. %, at most 10 wt .-%, at most 5 wt .-% or even only 1 wt .-% are.
  • quartzite mineral refers to minerals having a quartzite content of at least 50% by weight. at least 80 wt .-%, at least 90 wt .-% or even at least 96 wt .-% consist of quartzite.
  • quartzite is understood to mean fine to medium-grained metamorphic rock particles having a particle size of 0.002 mm to 0.063 mm (equivalent diameter) and having a SiO 2 content of at least 95% by weight.
  • the SiO 2 content of the quartzite particles is preferably at least 98% by weight, at least 99% by weight or even 100% by weight.
  • the quartzitic mineral used according to the invention is in particulate form and comprises at least 95% by weight of components having a particle size in the range from 0.002 mm to 0.063 mm (equivalent diameter).
  • the mean grain size of the quartzitic mineral used in the invention is in the range of 0.01 to 0.05 mm.
  • the quartzitic mineral is dried quartzitic mineral.
  • dried quartzitic minerals having a residual water content of less than 1.0% by weight or less than 0.5% by weight, more preferably less than 0.2% by weight.
  • the drying of the quartzitic mineral for purposes of the present invention is carried out by hot air at a temperature in the range of 400 to 500 ° C.
  • the crosslinking agent according to the invention contained in the binder component B consists of 85 to 98 wt .-% Cs to Cis fatty acid derivatives with terminal amino or sulfate group, 1 to 5 wt .-% of non-ionic polyacrylamide and 1 to 5 wt .-% cationic polyacrylamide.
  • the term "crosslinking agent” is to be understood here as meaning that the compounds contained in this agent are suitable for crosslinking the clay and quartzitic mineral particles contained in the binder component B and for combining them with displacement of excess water and, at the same time, binding to form the particles of the framework component A. This connection takes place partly via chemical (eg hydrogen bonding) and partly via physical (eg van der Waals forces) bonds at the molecular level.
  • the fatty acid amines and / or sulfates used according to the invention are to be understood as meaning aliphatic amines and / or sulfates derived from fatty acids having 8 to 18 carbon atoms in the carbon chain.
  • the fatty acid amines have a terminal primary amino group and thus the general formula Cs-is-alkyl-Nh or Cs-is-alkenyl-Nh, while the fatty acid sulfates a terminal sulfate group and thus the general formula Cs-is-alkyl-O-SOs " or C8-i8 alkenyl-0-S03 " exhibit.
  • the fatty acid amines and / or sulfates that can be used in the present invention include all of the corresponding amine and / or sulfate derivatives of the conventional saturated and mono- or polyunsaturated fatty acids having 8 to 18 carbon atoms in the carbon chain.
  • the proportion of the fatty acid amines and / or sulfates in the crosslinking agent is 85 to 98% by weight.
  • the proportion of fatty acid amines and / or sulfates 85 to 95 wt .-%.
  • the crosslinking agent contains from 1 to 5% by weight of nonionic polyacrylamide and from 1 to 5% by weight of cationic polyacrylamide.
  • the proportion of nonionic polyacrylamide or cationic polyacrylamide is preferably from 2 to 4% by weight. Particularly preferably, the sum of the proportions of nonionic and cationic polyacrylamide is 4 to 6 wt .-%.
  • the C 8 to C 18 fatty acid derivatives consist proportionally of i) 43 to 63% by weight of coconut fatty acid amines,
  • coconut fatty acid amines are understood as meaning fatty acid intermixtures which can be derived from the coconut oil and which contain at least 40% by weight of laurylamine and at least 10% by weight of myristylamine.
  • the coconut fatty acid amines consist of a mixture of laurylamine and myristylamine in a ratio in the range of 5: 1 to 4: 3.
  • the coconut fatty acid amine contains about 40 to 55 weight percent lauryl amine and about 10 to 25 weight percent myristyl amine.
  • the coconut oil fatty acid mixture also comprises about 8 to 10 weight percent palmitylamine and about 6 to 12 weight percent oleylamine.
  • the coconut oil fatty acid mixture additionally comprises up to 1% by weight of hexylamine, up to 8% by weight of octylamine, up to 9% by weight of decylamine, up to 3% by weight of stearylamine and / or up to 1% % By weight of linolamine.
  • the proportion of constituent i) relative to the total weight of the fatty acid amines and / or sulfates fraction is from 50 to 55% by weight.
  • Component ii) of the proportion of fatty acid amines and / or sulfates in the embodiments described herein consists of laurylamine.
  • This proportion of laurylamine is in addition to the possible proportion of laurylamine already contained in the proportion of fatty acid amines and / or sulfates via the component i).
  • the proportion of fatty acid amines and / or sulfates in addition to the laurylamine contained in the Kokosfettchureaminen (component i)) additionally comprises 8 to 18 wt .-% laurylamine based on the total weight of the proportion of fatty acid amines and / or sulfates.
  • Component iii) of the proportion of fatty acid amines and / or sulfates may alternatively be triethanolamine lauryl sulfate or sodium lauryl sulfate or tallow amine. Furthermore, this ingredient can also be composed of triethanolamine lauryl sulfate, sodium lauryl sulfate and / or tallow amine. In any case, the sum of the proportions of triethanolamine lauryl sulfate, sodium lauryl sulfate and / or tallow amine is always in the range of 25 to 39 wt .-% based on the total weight of the proportion of fatty acid amines and / or sulfates. In a preferred embodiment of the invention, the proportion of component iii) based on the total weight of the fatty acid amines and / or sulfates fraction ranges from 30 to 35% by weight.
  • tallow amine is understood as meaning a mixture of fatty acid amines which have 14 to 18 carbon atoms.
  • this mixture consists of at least 95% by weight of fatty acid amines having an even number of carbon atoms in the carbon chain.
  • this mixture has a content of 20 to 30 wt .-% palmitic acid, a content of 15 to 25 wt .-% stearic acid and / or a proportion of 35 to 45 wt .-% oleic acid.
  • the proportion of fatty acid amines and / or sulfates is characterized in that it consists of fully hydrogenated fatty acid amines or sulfates.
  • the hydrogenation leads to a saturation of the fatty acid amine or sulfate and thus to an increase in the melting point.
  • the result is a waxy substance, the binding effect of which probably has a particularly stabilizing and strengthening effect when the additive is used.
  • triethanolamine lauryl sulfate or sodium lauryl sulfate is contained as part of the proportion of fatty acid amines and / or sulfates, this preferably consists of dry triethanolamine lauryl sulfate or sodium lauryl sulfate.
  • the substance mixture according to the invention additionally contains, in addition to the proportions of framework component A and binder component B contained therein, the surfactant component C.
  • the surfactant component C consists of surfactants.
  • surfactants refers to chemicals that lower the surface tension of water once dissolved in it
  • Surfactants are organic compounds composed of a nonpolar and a polar portion, the nonpolar portion is usually an alkyl group or an alkylbenzene group and the polar part is usually selected from an alcohol, ether, alcohol, ether, carboxyl, sulfonyl, sulfato or quaternary ammonium group
  • the surfactants used according to the invention can be nonionic, anionic, cationic or amphoteric surfactants or mixtures thereof.
  • the proportion of surfactant component C based on the sum of components A, B and C is 0.001-0.01% by weight. In certain embodiments of the invention, the proportion of surfactant component C based on the sum of components A, B and C is in the range of 0.005-0.01% by weight.
  • surfactant component C is added to the remaining components A and / or B just prior to preparation of the composition to produce the sealed surface. This preferably takes place in the form of an aqueous surfactant solution having a surfactant content of from 5 to 40% by weight.
  • the surfactant component C is provided in the form of a surfactant-containing water-dispersible mineral granule.
  • the mineral surfactants in the water-dispersible mineral granules are preferably in the range from 5 to 40% by weight. %.
  • the mass fraction of the water-dispersible mineral granules is preferably in the range from 0.01 to 0.1% by weight, based on the total weight of the substance mixture according to the invention.
  • the proportion of the framework component A in the mixture of substances is 60 to 80% by weight. In certain embodiments, the proportion of the framework component A is in any case> 60% by weight. In further embodiments, the proportion of the framework component A is even greater than 65 wt .-%, greater than 70 wt .-% or greater than 75 wt .-%.
  • the proportion of binder component B in the mixture according to the invention is 20 to 40 wt .-% by default. In certain embodiments, the proportion of the binder component is in any case less than 40 wt .-% or even less than 35 wt .-%, less than 30 wt .-% or less than 25 wt .-%.
  • the stability and water resistance of the surface seal produced from the substance mixture according to the invention changes.
  • components A and B can be varied accordingly.
  • the substance mixture according to the invention may contain further additives which, however, are only present in small amounts.
  • the mixture according to the invention will consist of at least 90% by weight of the inventive combination of the framework component A, the binder component B and the surfactant component C.
  • the composition is at least 95% by weight of the combination of the backbone component A, the binder component B, and the surfactant component C.
  • the composition of this invention is at least 98% by weight, at least 99% by weight, or even 100% by weight of the combination of the framework component A, the binder component B and the surfactant component C.
  • An additive which may be present in the mixture of substances according to the invention in addition to the framework component A, the binder component B and the surfactant component C, are small amounts of cement or lime or other minerals to which the crosslinking agent contained in the binder component B may be applied.
  • the cement or lime or the other mineral is present in proportions in the range from 0.5 to at most 10% by weight. In certain embodiments, the proportion is only 0.5 to 6 wt .-% or even only 0.5 to 1 wt .-%. It should be expressly pointed out at this point that the proportion of cement and / or lime contained in the mixture of substances in some embodiments of the invention does not make any appreciable contribution to the bond per se.
  • the proportions of cement or lime only assume a distribution function. If the crosslinking agent is in fact applied to cement or lime, it can be better distributed in the dry mixture of the binder component B and thus ultimately also in the mixture of the binder component B with the framework component A and the surfactant component C.
  • the crosslinking agent is in fact applied to cement or lime, it can be better distributed in the dry mixture of the binder component B and thus ultimately also in the mixture of the binder component B with the framework component A and the surfactant component C.
  • the substance mixture according to the invention is, for the most part, a mixture of dry substances which, for further processing in the production of sealed surfaces, must still be converted into an injectable or sprayable mass.
  • a mixture of dry substances which, for further processing in the production of sealed surfaces, must still be converted into an injectable or sprayable mass.
  • the exact ratio between dry mix and water used depends on the further processing method and the specific requirements on site.
  • the Spritzg. Spraying ability can be increased by higher water content. However, the resulting more liquid consistency of the mass may be less desirable, especially when surfaces are to be processed, which have an excessive slope.
  • the proportion of water in the mass is 25 to 35 wt .-%. Even more preferred are water levels in the range of 26 to 32 weight percent.
  • the surfactant component C is not added in process step C in the form of an aqueous Tensidlosung but in process step a) in the form of a surfactant-containing water-dispersible mineral granules. In a further alternative embodiment of the invention, the surfactant component C is added to the binder components B before the process step a).
  • the composition of the invention is applied by wet spraying or by means of a paver with subsequent compaction on the area to be sealed.
  • a layer thickness of 5 to 30 cm applied to the area to be sealed surface.
  • the composition of the invention undergoes a pressure due to the process, which effects a compression of the mass and promotes binding between the particles of the components.
  • the pressure is in the range> 0.2 N / mm 2 pressure or more than 95% of Proctor density.
  • a reliable complete seal of the area to be sealed can hardly be guaranteed, and a layer thickness of more than 30 cm is not necessary and would only entail a higher material consumption.
  • already layer thicknesses in the range of 5 to 20 cm are sufficient to seal a surface watertight.
  • a reliable, waterproof seal is reliably achieved even with a layer thickness in the range of 8 to 15 cm.
  • composition of the invention applied to the surface to be sealed is completely cured, it is completely load-bearing and can either be left in this form or preferably still be covered with a layer of earth at least 30 cm thick.
  • geotextiles are first laid out on the area to be sealed before the composition according to the invention is applied.
  • Geotextiles are textiles of natural (eg reed, jute and coconut) or artificial (eg polypropylene, polyamide, polyester and polyethylene) fabrics, which are used in the form of fabrics, nonwovens and composites.
  • first the layer of the composition according to the invention is applied to which then geotextiles are laid out.
  • first a thin layer of the composition according to the invention is applied to which then geotextiles are laid out, whereupon a further layer of the composition according to the invention is then applied.
  • the crosslinking agent used in this formulation consists of 50% by weight of coconut fatty acid amines, 15% by weight of laurylamine and 35% by weight of lauryl sulfate.
  • an aqueous surfactant solution with a proportion of 15% by weight of surfactants is added at a level of 1 cm 3 / kg, based on the binder component B.
  • the dry mixture described above is stirred in the ratio of water to solid of 0.4 to a sprayable or sprayable mass.
  • the mass produced in this way is applied by means of a paver with subsequent compaction on the surface to be sealed under pressure of> 0.2 N / mm 2 pressure or at least 95% of the Proctor density with a layer thickness of at least about 10 cm and then allowed to dry ,
  • the waterproof surface sealed in this way can be filled with water after complete drying out of the layer, without the water can penetrate into the underlying soil.

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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)
  • Dispersion Chemistry (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

Pour fournir un système avec lequel il est possible d'obtenir des surfaces scellées dans le cadre de travaux publics, en particulier l'ingénierie hydraulique et l'industrie minière souterraine, de manière rentable et avec relativement peu d'efforts techniques et de traitement, ces surfaces présentant une haute résistance mécanique et une stabilité particulièrement longue, la présente invention concerne un mélange ayant la composition suivante, à savoir : 60 à 80 % en poids de composant structural A, composé de sable siliceux dont la granulométrie se situe dans la plage de 0,063 à 2 mm, 20 à 40 % en poids de composant liant B, constitué d'un mélange d'argile et de minéral quartzitique, ce minéral quartzitique présentant une granulométrie située dans la plage de 0,002 mm à 0,063 mm et le mélange contenant une fraction d'agent de réticulation de 0,01 à 1,0 % en poids, l'agent de réticulation étant constitué de 85 à 98 % en poids de dérivés d'acides gras C8 à C18 ayant un groupe terminal amino ou sulfate, de 1 à 5 % en poids de polyacrylamide non ionique et de 1 à 5 % en poids de polyacrylamide cationique, de même que de 0,001 % à 0,01 % en poids d'un composant tensioactif C.
PCT/EP2016/058633 2015-04-27 2016-04-19 Agent et procédé pour sceller des surfaces dans le cadre de travaux publics WO2016173885A1 (fr)

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CN113548821A (zh) * 2021-08-02 2021-10-26 中能建西北城市建设有限公司 砂层地质钻孔灌注桩中含化学泥浆的砂再利用方法及含有该砂的混凝土组合物

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DE3406617A1 (de) 1983-02-25 1984-08-30 Yeda Research And Development Co., Ltd., Rehovot Eine wasserundurchlaessige zusammensetzung und ein verfahren zu ihrer herstellung
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113548821A (zh) * 2021-08-02 2021-10-26 中能建西北城市建设有限公司 砂层地质钻孔灌注桩中含化学泥浆的砂再利用方法及含有该砂的混凝土组合物
CN113548821B (zh) * 2021-08-02 2022-07-29 中能建西北城市建设有限公司 砂层地质钻孔灌注桩中含化学泥浆的砂再利用方法及含有该砂的混凝土组合物

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