WO2019086489A1 - Liqueur de macération du maïs en tant qu'additif pour suspensions minérales - Google Patents

Liqueur de macération du maïs en tant qu'additif pour suspensions minérales Download PDF

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Publication number
WO2019086489A1
WO2019086489A1 PCT/EP2018/079763 EP2018079763W WO2019086489A1 WO 2019086489 A1 WO2019086489 A1 WO 2019086489A1 EP 2018079763 W EP2018079763 W EP 2018079763W WO 2019086489 A1 WO2019086489 A1 WO 2019086489A1
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Prior art keywords
corn steep
steep liquor
mineral
plasticizer
composition
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PCT/EP2018/079763
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English (en)
Inventor
Shailesh SANGLE
Amarjeet Singh
Ulf Velten
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Sika Technology Ag
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Publication of WO2019086489A1 publication Critical patent/WO2019086489A1/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
    • C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
    • C04B24/10—Carbohydrates or 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
    • C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
    • C04B24/12—Nitrogen containing compounds organic derivatives of hydrazine
    • C04B24/123—Amino-carboxylic acids
    • 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
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
    • C04B40/0028—Aspects relating to the mixing step of the mortar preparation
    • C04B40/0039—Premixtures of ingredients
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
    • C04B2103/30—Water reducers, plasticisers, air-entrainers, flow improvers
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
    • C04B2103/30—Water reducers, plasticisers, air-entrainers, flow improvers
    • C04B2103/302—Water reducers
    • 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
    • C04B2103/40—Surface-active agents, dispersants
    • C04B2103/408—Dispersants

Definitions

  • the invention relates to the use of an admixture for mineral suspensions as well as a method for producing a mineral suspension.
  • a further aspect is concerned with a composition comprising an element selected from the group consisting of solid mineral particles, aggregates, mineral binders and/or further admixtures.
  • the invention deals with a molded body obtainable by hardening a mineral binder composition.
  • Admixtures are substances or mixtures of different substances, typically liquids or powders, which are added to mineral suspensions, e.g. mineral binder
  • compositions in small quantities to meet specific requirements.
  • admixtures can have a significant impact on the properties and behaviour of fresh as well as hardened mortar or concrete, respectively.
  • dispersants Widely used admixtures in construction industry are so called dispersants.
  • dispersants are used as plasticizers or water-reducing agents for hydraulically setting compositions, e.g. for mortars and concrete.
  • Water-reducing agents allow for reducing the amount of water which is used for preparing hydraulically setting compositions without negatively affecting rheological properties or workability of the hydraulically setting compositions.
  • a plasticizer is meant to be an agent which allows for improving the workability of hydraulically setting compositions at a given water content.
  • Most effective dispersants for hydraulic binders like cement or plaster are synthetically produced substances such as naphthalene sulfonic acid- formaldehyde condensates, sulfonated melamine-formaldehyde condensates and polycarboxylates or polycarboxylate ethers.
  • synthetically produced substances such as naphthalene sulfonic acid- formaldehyde condensates, sulfonated melamine-formaldehyde condensates and polycarboxylates or polycarboxylate ethers.
  • all these substances are based on fossil raw materials such as petroleum or natural gas.
  • Lignosulfonates are used as an alternative for the above mentioned synthetic dispersants. Lignosulfonates are natural waste products from the pulp and paper industry using a sulfite pulping process of wood. In contrast to the above mentioned synthetic dispersants. Lignosulfonates are natural waste products from the pulp and paper industry using a sulfite pulping process of wood. In contrast to the above mentioned synthetic dispersants. Lignosulfonates are natural waste products from the pulp and paper industry using a sulfite pulping process of wood. In contrast to the above
  • lignosulfonates are waste products which are based on renewable raw materials.
  • dispersants derived from modified renewable materials based on e.g. cellulose or starch, have been proposed as dispersants as well.
  • raw materials based on renewable materials may be added to dispersants which either give a certain water reduction or which are used to adjust the setting time or other properties.
  • Suitable materials to mention are products derived from hydrolyzed cellulose or starch like glucose/corn syrups (with varying amounts of glucose, oligo- and polysaccharides), glucose, gluconate,
  • beneficial admixtures based on renewable raw materials or by products of industrial processes shall be provided.
  • the admixtures shall be effective dispersants for mineral suspensions, in particular dispersants for mineral binder compositions, such as mortar or concrete compositions.
  • the admixtures should be obtainable as economic as possible and fulfill cost-benefit ratios.
  • corn steep liquor is used as an admixture for a mineral suspension.
  • corn steep liquor turned out to be a highly beneficial admixture for mineral suspensions, in particular for mineral binder compositions.
  • corn steep liquor is a readily available by-product of corn wet-milling and completely based on renewable sources.
  • corn steep liquor can be used to specifically tune properties and behavior of mineral suspensions.
  • Corn steep liquor can for example be used as an effective dispersant, in particular in mineral binder compositions such as mortar or concrete compositions.
  • corn steep liquor has proven to be highly compatible with conventional admixtures.
  • corn steep liquor can be used in combination with conventional mortar or concrete admixtures, such as conventional dispersants.
  • conventional dispersants such as conventional dispersants.
  • corn steep liquor can e.g. be used as partial replacement for
  • conventional admixtures e.g. lignosulfonates or other raw materials based on renewable materials, as dispersants, for influencing setting time and/or other properties.
  • corn steep liquor it is possible to use corn steep liquor in order to tune properties of conventional admixtures.
  • Corn steep liquor is also advantageous from economic and ecological standpoints since it can be used as an admixture for mineral suspensions as commercially available without need for any further processing step.
  • corn steep liquor fulfills cost-benefit ratios and performance requirements when used as an admixture for mineral suspensions.
  • a first aspect of the invention relates to the use of corn steep liquor as an admixture for a mineral suspension.
  • corn steep liquor is used in order to purposefully adjust and/or change physical and/or chemical properties of the mineral suspension.
  • Corn steep liquor stands in particular for a by-product of corn wet-milling in the form of a viscous concentrate of corn solubles and is based on vitamins, amino acids, minerals. Corn steep liquor is known per se and has Chemical Abstracts (CAS) number 66071 -94-1 . European Community number (EC number) of corn steep liquor is 266-1 13-4.
  • corn steep liquor may have a different content of insolubles. If the insolubles content is too high either the performance or the storage stability of the final "corn steep liquor” containing admixture may be negatively influenced. In this case it is recommended to remove the insolubles before using counselcorn steep liquor" in admixtures.
  • Corn steep liquor as obtained as byproducts from industrial processes may have a solid content of 4 - 8 wt.-% with respect to the total weight of the corn steep liquor.
  • corn steep liquor is concentrated, e.g. by removal or evaporation of water, to obtain a higher solid contents for use in the present invention. It can even be converted to a solid powder form.
  • the corn steep liquor used in the present invention may have for example a solid content of about 10 - 80 wt.%, especially 20 - 70 wt.%, in particular 40 - 60 wt.% or 40 - 50 wt.%, with respect to the total weight of the corn steep liquor. With such solid contents, the corn steep liquor is flowable and can easily be mixed into mineral suspensions.
  • mineral suspension stands in particular for a heterogeneous mixture containing solid mineral particles that are dispersed throughout a fluid phase, which is in particular a liquid, especially containing or consisting of water. A weight ratio of liquid phase to mineral particles lies
  • mineral suspensions are workable mineral binder compositions, for example mortar or concrete compositions, especially tempered with water.
  • Other examples of mineral suspensions are so-called tailings or dressing residues. These are fine-grained rock residues in the form of slurry which are left behind in ore mining after the valuable ore has been separated from the rock. Tailings are conveyed from the mines or ore processing sites to large storage facilities (for example artificially produced basins).
  • the mineral suspension is a fine-grained suspension.
  • the mineral suspension comprises mineral particles having a particle size ⁇ 1 mm, especially ⁇ 125 ⁇ or ⁇ 63 ⁇ .
  • mineral binder in particular a mineral based binder which reacts in the presence of water in a hydration reaction to form solid hydrates or hydrate phases.
  • This can be, for example, a hydraulic binder (such as cement or hydraulic lime), a latent hydraulic binder (such as slag), a pozzolanic binder (such as fly ash or natural pozzolans) or a nonhydraulic binder (plaster).
  • a “mineral binder” or “mineral binder composition” can be a
  • cementitious binder or a “cementitious binder composition” meaning in the present case in particular a binder or a binder composition with a fraction of at least 5 wt.-%, especially at least 20 wt.-%, preferably at least 35 wt.-%, especially at least 65 wt.-% cement clinker.
  • the binder or a binder composition is at least 95 wt.-% made up of cement clinker.
  • a "cementitious binder” or a “cementitious binder composition” is based on cement which is defined e.g. in the standards EN 197-1 or ASTM C150 or ASTM C595.
  • a fraction of the cement clinker in the overall "cementitious binder” or a “cementitious binder composition” preferably amounts to at least 5 wt.-%, especially at least 20 wt.-%, preferably at least 35 wt.-%, especially at least 65 wt.- %.
  • the "cementitious binder” or a “cementitious binder composition” is at least 95 wt.-% made up of cement clinker.
  • the "mineral binder” or the “mineral binder composition” can also be advantageous for the "mineral binder” or the “mineral binder composition” to contain other binders in addition to or instead of a hydraulic binder.
  • binders in addition to or instead of a hydraulic binder.
  • These are, in particular, latent hydraulic binders and/or pozzolanic binders.
  • Suitable latent hydraulic and/or pozzolanic binders are, e.g., slag, fly ash, silica dust and/or natural pozzolans.
  • the binder composition can contain inert substances such as ground limestone, ground quartz, and/or pigments.
  • the mineral binder contains 5 to 95 wt.-%, especially 5 to 65 wt.-%, particularly 15 to 35 wt.-% of latent hydraulic and/or pozzolanic binders.
  • the mineral suspension is a mineral binder composition containing a mineral binder.
  • a mineral binder composition additionally contains solid aggregates, especially gravel, sand and/or aggregates.
  • compositions can be used, for example, as mortar mixtures or concrete mixtures.
  • the mineral binder composition contains in addition water, wherein a weight ratio of water to mineral binder lays preferably in the range of 0.25 to 0.8, especially 0.3 to 0.7, preferably 0.4 to 0.6.
  • a weight ratio of water to mineral binder lays preferably in the range of 0.25 to 0.8, especially 0.3 to 0.7, preferably 0.4 to 0.6.
  • Such binder compositions can be worked directly as mortar mixtures or concrete mixtures.
  • the mineral binder composition is a mortar or concrete composition comprising a mineral binder, aggregates and water.
  • the mineral binder composition comprises for example 5 - 30 wt.%, in particular 10 - 25 wt.%, especially 15 - 20 wt.%, of mineral binder, especially cement and 70 - 95 wt.%, in particular 75 - 90 wt.%, especially 80 - 85 wt.%, of aggregates, especially sand, gravel and/or rock material.
  • a density of the mineral binder composition, more particularly in the cured state, is more particularly > 1 .0 kg/dm 3 , preferably > 1 .5 kg/dm 3 , advantageously > 1 .8 kg/dm 3 , especially > 2.0 kg/dm 3 , more preferably 2.1 - 2.6 kg/dm 3 .
  • the mineral binder composition is not a lightweight concrete
  • composition or a mineral binder composition with a density ⁇ 1 .8 kg/dm 3 , especially ⁇ 1 .5 kg/dm 3 or ⁇ 1 .0 kg/dm 3 .
  • the corn steep liquor is used as a dispersant for the mineral suspension, whereby the mineral suspension preferably is a mineral binder composition, especially a mortar or concrete composition.
  • the corn steep liquor is used in order to disperse solid particles having particle sizes ⁇ 1 ⁇ 00 ⁇ , especially ⁇ 125 ⁇ .
  • corn steep liquor is used as a plasticizer and/or water reducer in a mineral binder composition.
  • corn steep liquor has shown a
  • corn steep liquor can also be used for other purposes, e.g. as a retarder for mineral binder compositions.
  • the corn steep liquor is preferably used in a proportion of 0.001 - 10 wt.-%, particularly 0.01 - 5 wt.%, especially 0.01 - 2 wt.%, preferably 0.1 - 2 wt.-%, in particular 0.1 - 1 .5 wt.%, especially preferred 0.1 - 0.9 wt.% or 0.2 - 0.7 wt.%, with respect to the mineral material, especially with respect to the mineral binder, present in the mineral suspension.
  • corn steep liquor is highly effective in selectively adjusting properties of mineral suspensions. Especially, these concentrations give rise to a pronounced dispersing effect in mineral binder compositions. However, for special applications and purposes, lower or higher concentrations can be used as well.
  • the corn steep liquor is used in combination with at least one further admixture.
  • the corn steep liquor and the at least one further admixture can be used in the form of a one-component admixture or in the form of a two-, three- or multi-component admixture.
  • the at least one further admixture comprises at least one plasticizer, especially a plasticizer selected from the group consisting of polycarboxylates, polycarboxylate ethers, vinyl copolymers, lignosulfonates, naphthalene sulfonic acid-formaldehyde condensates, sulfonated melamine- formaldehyde condensates and/or carbohydrates.
  • a plasticizer selected from the group consisting of polycarboxylates, polycarboxylate ethers, vinyl copolymers, lignosulfonates, naphthalene sulfonic acid-formaldehyde condensates, sulfonated melamine- formaldehyde condensates and/or carbohydrates.
  • the plasticizer is selected from lignosulfonates, naphthalene sulfonic acid-formaldehyde condensates, sulfonated melamine-formaldehyde condensates and/or carbohydrates.
  • the plasticizer comprises or consists of lignosulfonates.
  • Lignosulfonates or sulfonated lignin, respectively, are water- soluble anionic polyelectrolyte polymers which are in particular by-products from the production of wood pulp using sulfite pulping.
  • plasticizers especially lignosulfonates.
  • the plasticizing effect can be tuned to specific purposes. Also, it is for example possible to at least partly replace less economic and/or less ecological plasticizers with corn steep liquor which helps to improve the cost-benefit ratio. In some cases, it is even possible to significantly improve the overall plasticizing effect when using combinations of corn steep liquor with other plasticizer. This is in particular true if the plasticizer is selected from lignosulfonates.
  • corn steep liquor is used for partly replacing another plasticizer, especially a plasticizer as mentioned above, preferably lignosulfonates.
  • corn steep liquor is used together with another plasticizer in order to reduce the proportion of the other plasticizer.
  • the plasticizer is replaced by corn steep liquor in a proportion such that a plasticizing effect of the
  • combination of the plasticizer and the corn steep liquor is essentially the same or better.
  • the flow table spread of the mineral binder composition is taken as a measure of the plasticizing effect.
  • the term "essentially the same” in particular means that the plasticizing effect or the flow table spread does not change more than 10%, especially not more than 5%, particularly not more than 1 %.
  • corn steep liquor is used to replace from 0.1 - 75 wt.%, especially 1 - 50 wt.%, preferably 5 - 40 wt.%, in particular 10 - 35 wt.%, especially preferred 10 - 20 wt.%, of the other plasticizer, especially lignosulfonates.
  • the at least one further admixture in addition or instead of the at least one plasticizer, can comprise one or more substances selected from the group comprising defoamers, colorants, preservatives, retarders, accelerators, air pore forming agents, shrinkage reducers, viscosity modifiers, stabilizers, biocides and/or a corrosion inhibitors.
  • a setting retarder can for example be derived from hydrolyzed cellulose and/or starch.
  • the set retarder is for example a glucose/corn syrup (with varying amounts of glucose, oligo- and polysaccharides), glucose, gluconate, hydrogenated glucose products and/or or waste products like vinasse type materials or molasses (sugar production) as well as other sugar or sugar acid types.
  • Such kinds of retarders are also available from renewable sources.
  • a weight ratio of the corn steep liquor to the at least one further admixture, especially the plasticizer is from 0.1 :99.9 - 75:25, especially 1 :99 - 50:50, preferably 5:95- 40:60, in particular 10:90 - 35:65, especially preferred 10:90 - 20:80.
  • corn steep liquor and at least one further admixture can be present in the form of a one-component admixture or in the form of a two-, three- or multi-component admixture or as a kit of parts.
  • corn steep liquor can for example be present in a first component whereas the at least one further element is present in a second component.
  • the composition is a one-component composition. This simplifies the use of the composition for the user. However, for example in order to have a composition which can be flexibly adapted to different needs, two-, three- or multi- component admixtures or kit of parts may be beneficial as well.
  • the composition is a mineral suspension, in particular as described above.
  • composition comprises corn steep liquor and at least one further admixture for concrete mortar and/or grouts, especially conforming to EN 934- 2:2009+A1 :2012.
  • the at least one further admixture comprises at least one plasticizer, especially a plasticizer selected from the group consisting of polycarboxylates, polycarboxylate ethers, vinyl copolymers, lignosulfonates, naphthalene sulfonic acid-formaldehyde condensates, sulfonated melamine- formaldehyde condensates and/or carbohydrates.
  • a plasticizer selected from the group consisting of polycarboxylates, polycarboxylate ethers, vinyl copolymers, lignosulfonates, naphthalene sulfonic acid-formaldehyde condensates, sulfonated melamine- formaldehyde condensates and/or carbohydrates.
  • the plasticizer is selected from lignosulfonates, naphthalene sulfonic acid-formaldehyde condensates, sulfonated melamine-formaldehyde condensates and/or carbohydrates.
  • the plasticizer comprises or consists of lignosulfonates.
  • compositions comprising corn steep liquor and other admixtures can be beneficial as well.
  • these are for example admixtures as described above in connection with the first aspect of the present invention.
  • a weight ratio of the corn steep liquor to the at least one further admixture, especially the plasticizer, in the composition is from 0.1 :99.9 - 75:25, especially 1 :99 - 50:50, preferably 5:95- 40:60, in particular 10:90 - 35:65, especially preferred 10:90 - 20:80.
  • a highly preferred composition comprises: a) the corn steep liquor, with respect to the solid content of the corn steep liquor, with a proportion of from 0.1 - 75 wt.-%, especially 1 - 50 wt.-%, preferably 5 - 40 wt.-%; b) the plasticizer with a proportion of from 25 - 99.9 wt.-%, especially 50 - 99 wt.-%, in particular 60 - 95 wt.-%; wherein the wt.-% are with respect to the solid content of the composition.
  • the amount of plasticizer is given with respect to plasticizing substance as such.
  • the weight of solvents or other excipients possibly present in a plasticizer should not be taken into account in this regard.
  • the composition can comprise water, preferably with a proportion of 5 - 80 wt.%, especially 20 -70 wt.%, in particular 30 - 65 wt.% or 40 - 60 wt.%, with respect to the overall weight of the composition.
  • compositions can directly be used as admixtures for mineral suspensions, in particular for mineral binder compositions.
  • the composition is present as a mineral binder composition, comprising corn steep liquor and at least one mineral binder.
  • the mineral binder and the corn steep liquor are in particular defined as described above in connection with the first aspect of the present invention.
  • the binder composition can be present for example in dry form or as a fluid or stiffened binder composition, in particular made with added water.
  • a fraction of the corn steep liquor in relation to the mineral binder amounts in particular to 0.01 to 10 wt.-%, preferably 0.1 to 5 wt.-% or 0.5 - 2 wt.-%. The fraction here pertains especially to the solid content of the corn steep liquor.
  • the binder composition additionally contains solid aggregates, especially gravel, sand and/or aggregates.
  • solid aggregates especially gravel, sand and/or aggregates.
  • Corresponding compositions can be used, for example, as mortar mixtures or concrete mixtures.
  • the binder composition contains in addition water, wherein a weight ratio of water to mineral binder lays preferably in the range of 0.25 to 0.8, especially 0.3 to 0.7, preferably 0.4 to 0.6.
  • a weight ratio of water to mineral binder lays preferably in the range of 0.25 to 0.8, especially 0.3 to 0.7, preferably 0.4 to 0.6.
  • Such binder compositions can be worked directly as mortar mixtures or concrete mixtures.
  • the invention is also related to a molded body, which is obtainable by hardening of a binder composition as described above after adding water.
  • the molded body so produced can have practically any desired shape and it can be, for example, part of a construction project, such as a building, a wall or a bridge.
  • Another aspect concerns a method for preparing a mineral suspension, in particular a mineral binder composition as described above, wherein corn steep liquor is combined with solid mineral particles in a fluid, especially in water.
  • the mineral particles are selected from mineral binder, especially hydraulic mineral binder.
  • the corn steep liquor can for example be mixed in with the add water for the mineral binder composition, which is then used to stir the binder composition. It is also possible to add corn steep liquor or the composition containing same directly to the mineral material or binder and to mix in the add water before and/or later on, if necessary. Even it is possible that only one part of the corn steep liquor is mixed with the add water and the other part is added before, with and/or after the addition of the add water to the binder composition.
  • the corn steep liquor can even be added during the cement production, alone or in combination with commercially available cement additives to influence grindability of cement and/or cement properties of ground cements.
  • Exemplary embodiments 1 Corn steep liquor based compositions
  • Corn steep liquor (CSL) compositions S1 and S2 have been produced by mixing commercially available corn steep liquor (solid content: 42.28 wt.%) with lignosulfonate (Borrespherse CaSA DF; available from Borregaard LignoTech, Norway; solid content: 95 wt.%), triisobutyl phosphate (defoamer; solid content: 100 wt.%) and water.
  • lignosulfonate Borosulfonate
  • Triisobutyl phosphate defoamer
  • solid content 100 wt.%
  • the corn steep based compositions as well as the reference composition were tested in mortar mixtures.
  • the mortar mixtures used have dry compositions as described in table 2: Table 2: Mortar mixtures
  • the sands, the fillers and the cement were mixed dry for 1 minute in a Hobart mixer.
  • the entire wet mixing time was 3 minutes.
  • the water/cement value (w/c value) was 0.39.
  • compositions S1 , S2 and R were used with a fraction of 0.5 wt.% or 1 wt.% of the cement content (cf. table 3).
  • the flow table spread (FTS) of fresh mortar mixtures was measured in each case at various times.
  • the compressive strength of the mortar mixtures was determined 1 day (1 d), 7 days (7d) and 28 days (28d). Also, the setting time of the mortar mixtures was measured.
  • the test to determine the compressive strength (in N/mm 2 ) was carried out on prisms (40 x 40 x 1 60mm) according to standard EN 12390-1 to 12390-4.
  • the flow table spread (FTS) of the mortar compositions was determined according to EN 1015-3.
  • the setting time was determined via semi-adiabatic calorimetry, a method which is well known to the skilled person.
  • Table 3 gives a summary of the results obtained. Table 3: Effects of CSL compositions in mortar mixtures
  • compositions S1 and S2 both comprising corn step liquor, clearly show a plasticizing effect in mortar compositions which is at least as good as with pure lignosulfonates.
  • FTS after 0 minutes is even higher than in experiment A1 where the reference composition without corn steep liquor was used.
  • corn steep liquor can be used as admixtures for mineral suspensions.
  • corn steep liquor is an effective dispersant and plasticizer for mineral binder compositions which is furthermore compatible with existing mid-range water reducers.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
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  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

La présente invention concerne une liqueur de macération du maïs qui est utilisée comme additif pour une suspension minérale, en particulier une composition de liant minéral.
PCT/EP2018/079763 2017-11-06 2018-10-30 Liqueur de macération du maïs en tant qu'additif pour suspensions minérales WO2019086489A1 (fr)

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EP17200211 2017-11-06
EP17200211.5 2017-11-06

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022221659A1 (fr) * 2021-04-15 2022-10-20 Saudi Arabian Oil Company Additif retardateur à base de lignosulfonate et d'hydrate de carbone hydrolysé pour mélange de ciment

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2701705A1 (fr) * 1993-02-19 1994-08-26 Roquette Freres Adjuvant et composition pour la préparation de liants hydrauliques, liants hydrauliques ainsi obtenus et procédé pour les préparer.
US20110290148A1 (en) * 2010-05-25 2011-12-01 Bill Major Novel binder for pelletizing mineral rock fines

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Publication number Priority date Publication date Assignee Title
WO2022221659A1 (fr) * 2021-04-15 2022-10-20 Saudi Arabian Oil Company Additif retardateur à base de lignosulfonate et d'hydrate de carbone hydrolysé pour mélange de ciment
US11535557B2 (en) 2021-04-15 2022-12-27 Saudi Arabian Oil Company Lignosulfonate and hydrolyzed carbohydrate retarder additive for cement mixture

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