COMB POLYMERS AS BLOCKING ADDITIVES FOR SWELLING CLAYS

A comb polymer, in particular for use as a clay-inerting agent, including: a) at least one poly(alkylene oxide) side chain-bearing monomer unit M1 without ionic groups, b) optionally at least one cationic monomer unit MC, c) optionally at least one anionic monomer unit MA, d) optionally, at least one non-ionic monomer unit M3, wherein the molar ratio of the cationic monomer units MC to the side chain-bearing monomer units M1 is equal to or less than 10, the molar ratio of the anionic monomer units MA to the side chain-bearing monomer units M1 is less than 1, preferably equal to or less than 0.5, and the molar ratio of the non-ionic monomer units M3 to the side chain-bearing monomer units M1 is less than 5. 6. A comb polymer according to claim 1 , wherein the comb polymer claim 1 , with respect to the total number of monomer units present in the comb polymer claim 1 , comprises:{'sup': '1', 'a) 95-100 mol-%, of the at least one poly(alkylene oxide) side chain-bearing monomer unit M,'}b) 0-1 mol-%, of the at least one cationic monomer unit MC,c) 0-1 mol-%, of the at least one anionic monomer unit MA,d) 0-1 mol-%, of the at least one non-ionic monomer unit M3.7. A comb polymer according to claim 1 , wherein the comb polymer claim 1 , with respect to the total number of monomer units present in the comb polymer claim 1 , comprises:{'sup': '1', 'a) 30-70 mol-%, of of the at least one poly(alkylene oxide) side chain-bearing monomer unit M, and b) 0-1 mol-%, of the at least one cationic monomer unit MC,'}c) 0-1 mol-%, of the at least one anionic monomer unit MA,d) 30-70%, of the at least one non-ionic monomer unit M3.8. A comb polymer according to claim 1 , wherein the comb polymer claim 1 , with respect to the total number of monomer units present in the comb polymer claim 1 , comprises:{'sup': '1', 'a) 10-99 mol-%, of the at least one poly(alkylene oxide) side chain-bearing monomer unit M, and'}b) 1-90 mol-%, of the at least one cationic monomer unit MC,c) 0-1 mol-%, of ...

Polymers for cement dispersing admixtures

Polymers for cement dispersing admixtures, which show different performing properties in concrete are described. All polymers are based on a composition of reactants, namely    a) a poly(acrylic acid), b) a polyalkyleneglycol-monoalkylether and, optionally c) a α-amino-polyalkyleneglycol-ω-alkylether and/or d) a primary or secondary amine. By keeping the composition of reactants constant and varying only the reaction time, polymers with different properties can easily be achieved. Such polymers are suitable for precast, readymix or for increasing workability over time, just depending on reaction time. Polymers of the invention can be used as single polymer or in polymer blends. For this, the kinetics of the used polymer analogous condensation reaction was intensively studied. Additionally, the benefit of amines as reactant regarding stability and hydrolysis velocity of cleavable side groups was investigated.

Polymers for cement dispersing admixtures

Multipurpose, cement dispersing polymers for high flow and high strength concrete

Polymers in solid changing state

Polymers in the form of solid aggregate are obtained by reacting polymers derived from unsaturated mono- or di-carboxylic acids with polymers having unreactive blocking groups at one end of the chain and hydroxy or amino groups at the other end. Polymers in the form of a solid aggregate (I), obtained by reaction of: (A) polymer(s) derived from (a) unsaturated mono- or di-carboxylic acid(s) or analogs thereof and optionally (b) other unsaturated monomer(s); (B) polymer(s) which are terminated with functional hydroxy or amino groups at one end and blocked at the other end with groups which are unreactive under normal reaction conditions; and optionally (C) amine(s). Independent claims are also included for: (1) aggregated polymers (IA) as above, obtained by reaction of monomers (a) with (c) unsaturated esters and/or amides of polymer (B) and optionally other monomers (b) in presence of a radical initiator; (2) a method (M1) for the production of (I) by cooling a polymer melt and optionally pulverizing it into a transportable form; (3) a method (M2) for the production of (IA) by copolymerization of monomers as in (1) above, optionally in a solvent which is subsequently removed; and (4) aqueous solutions obtained by dissolving these polymers in water

Polymers in a solid state

Cement admixture for improved slump life

Described are polymers and cement admixtures which reduce drop in fluidity with time. Said admixture comprises at least one polymer of the present invention and at least one polymer A. The polymer of the present invention comprises side chains of which at least 10 weight-% can be cleaved in alkaline medium. The polymer of the present invention is an acrylic polymer which comprises side chains connected to the backbone by ester linkages. These side chains may be alkyl, hydroxy alkyl, cycloalkyl or polyoxyalkylene groups. Polymer A is a cement dispersing agent. The combination of polymer A with the polymer of the present invention in a weight ratio of 0.1:10-10:1, and preferably 1:10-10:1 reduces the drop in fluidity with time of cementitious compositions.

Emulsifying polymers and their use

The present invention relates to emulsifying polymers, in particular to the use of these polymers for the stable emulsification of hydrophobic additives in aqueous concrete plasticizers.

Cement admixture for improved slump life

Described are polymers and cement admixtures which reduce drop in fluidity with time. Said admixture comprises at least one polymer of the present invention and at least one polymer A. The polymer of the present invention comprises side chains of which at least 10 weight-% can be cleaved in alkaline medium. The polymer of the present invention is an acrylic polymer which comprises side chains connected to the backbone by ester linkages. These side chains may be alkyl, hydroxy alkyl, cycloalkyl or polyoxyalkylene groups. Polymer A is a cement dispersing agent. The combination of polymer A with the polymer of the present invention in a weight ratio of 0.1:10-10:1, and preferably 1:10-10:1 reduces the drop in fluidity with time of cementitious compositions.

Cement dispersing polymers for high flow, high strength and selfcompacting concrete

A multipurpose cement dispersing, shrinkage compensating and anticorrosive polymer and an admixture comprising said polymer, which improve the workability and the early strength development of fresh concrete, are described. Said polymer is an ester- and amid group-modified acrylic polymer, obtainable by aqueous solution radical copolymerization of (1) acrylic or methacrylic acid with (2) an acrylic or methacrylic methoxy-polyalkyleneglycolester monomer having 2 to 300 moles of an oxyalkylene group each having 2 to 3 carbon atoms, (3) optionally an acrylic or methacrylic methoxy-polyalkyleneglycolamide monomer having 2 to 300 moles of an oxyalkylene group each having 2 to 3 carbon atoms, (4) an acrylic or methacrylic ester of a tertiary aminoalkanol and (5) optionally an acrylic amide of a primary or secondary aliphatic, cycloaliphatic or aromatic amine.

Polymers for cement dispersing admixtures

Polymers for cement dispersing admixtures, which show different performing properties in concrete are de-scribed. All polymers are based on a composition of reac-tants, namely a) a poly(acrylic acid), b) a polyalkyleneglycol-monoalkylether and, optionally c) a .alpha.-amino-polyalkylene-glycol-.omega.-alkylether and/or d) a primary or secondary amine. By keeping the composition of reactants constant and varying only the reaction time, polymers with different properties can easily be achieved. Such polymers are suitable for pre-cast, readymix or for increasing workability over time, just depending on reaction time. Polymers of the invention can be used as single polymer or in polymer blends. For this, the kinetics of the used polymer analogous condensation reaction was intensively studied. Additionally, the benefit of amines as reactant regarding stability and hydrolysis velocity of cleavable side groups was investigated.

Polymers for cement dispersing mixtures

Beton içerisinde farkli çalisma özellikleri gösteren çimento dagitma karisimlarina yönelik polimerler tarif edilmektedir. tüm polimerler, bir reaktan kompozisyonuna, yani a)bir poli(akrilik asit),b) bir polialkilenglikolmonoalkileter ve istege göre c) bir a-mino-poli-alkilenglikol-alkileter ve/veya d) birincil veya ikincil bir amine dayanir. reaktan kompozisyonunu sabit tutup sadece reaksiyon süresini degistirerek farkli özelliklere sahip polimerler kolayca elde edilebilir. bu gibi polimerler, sadece reaksiyon süresine baagli olarak önceden dökme, hazir karisim veya zamanla artan islenebirlilik için uygundurlar. Bulusa ait polimerler, tekli polimer veya polimer karisimlari halinde kullanilabilir. bunun için, kullanilan polimer benzeri yogusturma reaksiyonunun kinetikleri üzerinde yogun çalismalar yapilmistir. Ayrica yarilabilir yan gruplarin kararliligi ve hidroliz velositesi konusunda reaktan olarak aminlerin faydasi da arastirildi. Polymers for cement dispersing mixtures having different working properties in concrete are described. all polymers are based on a reactant composition, i.e. a) a poly (acrylic acid), b) a polyalkyleneglycolmonoalkylether and optionally c) an α-mino-poly-alkyleneglycol-alkylether and / or d) a primary or secondary amine. polymers having different properties can be easily obtained by keeping the reactant composition constant and simply changing the reaction time. such polymers are only suitable for pre-pouring, ready-mix or increasing processability depending on the reaction time. The polymers of the invention may be used as single polymers or as polymer mixtures. for this, intensive studies have been made on the kinetics of the polymer-like condensation reaction used. The utility of amines as a reactant for stability and hydrolysis velocity of cleavable side groups was also investigated.

Polymer Comprising Amide And Ester Groups, Method For Production And Use Thereof

The invention relates to a method for the production of a polymer (P) comprising amide and ester groups, whereby, in a first step, a homo- or co-polymer (P1) of (meth)acrylic acid is reacted with a monohydroxy compound (E) at a temperature of up to 200° C., such that, in addition to ester groups, anhydride groups are formed and, in a second step, the anhydride groups formed in the first step are reacted with a monoamine compound (A) at temperatures significantly below 100° C. The invention further relates to polymers produced by the above method, the use thereof in hydraulic-setting compositions and said hydraulic-setting compositions before and after hardening by addition of water.

Emulsifying polymers and their use

The present invention relates to emulsifying polymers, in particular to the use of these polymers for the stable emulsification of hydrophobic additives in aqueous concrete plasticizers.

production of dispersants for solid suspensions from vinasse-type materials

um método para produção de um dispersante para suspensões minerais compreendendo as etapas de: a) fornecer um material do tipo vinhaça como insumo; b) passar o insumo através de pelo menos uma etapa de nanofiltração de modo a separar o insumo em uma fase de retentado e pelo menos uma fase de filtrado; c) coletar a fase de retentado previamente obtida e fornecê-la como dispersante.

Process for producing polymers having amide and ester groups in the solid state

The present invention relates to a process for producing a polymer P having amide and ester groups in the solid state, wherein, in the first step, (a) a homo- or copolymer P1 of (meth)acrylic acid, itaconic acid or crotonic acid is reacted with at least one monohydroxyl compound E at a temperature up to 200°C to give a polymer P2, so as to form anhydride groups as well as ester groups, wherein, in the second step, (b) the polymer P2 prepared in step (a) is cooled to below 60°C, such that the polymer P2 is present in the solid state or as a cooled melt, and wherein, in the third step, (c) the polymer P2 which has anhydride groups and is present in the solid state or as a cooled melt is amidated with at least one amine compound A at temperatures below 60°C, wherein the amine compound A used in the third step (c) is present in the solid state or on or in a solid carrier material.

Clay blocking additives for gypsum compositions

A comb polymer is used as an inerting agent for swelling clays and/or non-swelling clays in gypsum compositions, said comb polymer comprises: a) at least one poly(alkylene oxide) side chain-bearing monomer unit M1 without ionic groups, b) optionally at least one cationic monomer unit MC, wherein the molar ratio of the cationic monomer units MC to the side chain-bearing monomer units M1 is equal to or less than (10), c) optionally at least one anionic monomer unit MA, wherein the molar ratio of the anionic monomer units MA to the side chain-bearing monomer units M1 is less than 1, preferably equal to or less than 0.5, c) optionally, at least one non-ionic monomer unit M3, wherein the molar ratio of the non-ionic monomer units M3 to the side chain-bearing monomer units M1 is less than 5.

Polymers in a solid state

The invention relates to polymers in a solid state which may be obtained by reaction of at least one polymer (A), produced from at least one monomer (a) , selected from unsaturated mono- or di-carboxylic acids, or analogues of unsaturated mono- or di-carboxylic acids and optionally at least one ethylenically-unsaturated monomer (b) with at least one polymer (B) which is terminated at one end by terminal groups which are non-reactive under normal reaction conditions and hydroxy- or amino-functionalised at the other end thereof and, optionally, at least one amine (C). The invention further relat es to polymers in a solid sate which may be obtained by the reaction of at leas t one monomer (a), selected from unsaturated mono- or di-carboxylic acids or analogues of unsaturated mono- or di-carboxylic acids in the presence of a radical initiating agent with at least one monomer (c), selected from the group of unsaturated esters or amides of a polymer (B), terminated at one en d by terminal groups which are non-reactive under normal reaction conditions a nd hydroxy- or amino-functionalised at the other end thereof, with optionally a t least one ethylenically unsaturated monomer (b). The production and use of solid polymers as dispersants and fluidising agents in cement systems is als o disclosed.

Polymers in a solid state

Polymer Zementdispergierzusammensetzungen

Multipurpose, polymer cement dispersant for concrete with high flowability and strength

Polymers in a solid state

Slag-containing polymer concrete and grouting mortar

A curable binder composition includes: a) at least one organic binder selected from the group made of a1) epoxy resins and curing agents for epoxy resins and a2) polyisocyanates and polyols, and b) at least 50% by weight of slag based on 100% by weight of the binder composition.

Use of comb polymers as inerting agents for non-swelling layer-silicates

Use of a comb polymer as an inerting agent for non-swelling layer-silicates, said comb polymer comprising: a) at least one poly(alkylene oxide) side chain-bearing monomer unit M1 without ionic groups, b) optionally at least one cationic monomer unit MC, wherein the molar ratio of the cationic monomer units MC to the side chain-bearing monomer units M1 is equal to or less than 0.1, preferably less than 0.05, c) optionally at least one anionic monomer unit MA, wherein the molar ratio of the anionic monomer units MA to the side chain-bearing monomer units M1 is less than 1, preferably equal to or less than 0.5, and c) optionally at least one non-ionic monomer unit M3, wherein the molar ratio of the non-ionic monomer units M3 to the side chain-bearing monomer units M1 is less than 7, preferably equal to or less than 3.

Polymers in a solid state

The invention relates to polymers in a sold state which may be obtained by reaction of at least one polymer (A) , produced from at least one monomer (a) selected from unsaturated mono- or di-carboxylic acids, or analogues of unsaturated mono- or di-carboxylic acids and optionally at least one ethylenically-unsaturated monomer (b) with at least one polymer (B) which is terminated at one end by terminal groups which are non-reactive under normal reaction conditions and hydroxy- or amino-functionalised at the other end thereof and, optionally, at least one amine (C). The invention further relates to polymers in a solid state which may be obtained by the reaction of at least one monomer (a), selected from unsaturated mono- or di-carboxylic acids or analogues of unsaturated mono- or di-carboxylic acids in the presence of a radical initiating agent with at least one monomer (c) , selected from the group of unsaturated esters or amides of a polymer (B), terminated at one end by terminal groups which are non-reactive under normal reaction conditions and hydroxy- or amino-functionalised at the other end thereof, with optionally at least one ethylenically unsaturated monomer (b). The production and use of solid polymers as dispersants and fluidising agents in cement systems is also disclosed.

Polymers in a solid state

Die vorliegende Erfindung betrifft Polymere in festem Aggregatzustand, welche erhältlich sind durch die Reaktion von mindestens einem Monomer a, welches ausgewählt ist aus ungesättigten Mono- oder Dicarbonsäuren, oder Analoga von ungesättigten Mono- oder Dicarbonsäuren, in Gegenwart eines Radikalbildners mit mindestens einem Monomer c, ausgewählt aus der Gruppe der ungesättigten Estern oder Amiden eines Polymeren B, welches mit unter üblichen Reaktionsbedingungen nicht reaktiven Endgruppen einseitig abgeschlossen ist und am anderen Ende Hydroxy- oder Amin-funktionalisiert ist, mit gegebenenfalls mindestens einem ethylenisch ungesättigten Monomer b . The present invention relates to solid state polymers which are obtainable by the reaction of at least one monomer a which is selected from unsaturated mono- or dicarboxylic acids, or analogs of unsaturated mono- or dicarboxylic acids, in the presence of a radical generator with at least one monomer c, selected from the group of unsaturated esters or amides of a polymer B, which is unilaterally terminated with end groups which are not reactive under customary reaction conditions and is hydroxy- or amine-functionalized at the other end, with optionally at least one ethylenically unsaturated monomer b . Weiterhin sind beschrieben die Herstellung sowie die Verwendung des festen Polymers als Dispergiermittel und Verflüssiger in zementösen Systemen. Also described are the preparation and use of the solid polymer as a dispersant and condenser in cementitious systems.

Slag-containing polymer concrete and grouting mortar

The invention relates to a curable binder composition comprising : a) at least one organic binder, selected from the group consisting of a1) epoxy resins and a2) polyisocyanates and polyols, and b) at least 50 wt.% slag, in relation to 100 wt.% binder composition.

Emulsifying polymers and their use

The present invention relates to emulsifying polymers, in particular to the use of these polymers for the stable emulsification of hydrophobic additives in aqueous concrete plasticizers.

Dispergiermittel für hydraulisch abbindende systeme

Dispergiermittel für hydraulisch abbindende systeme

Polymere in festem aggregatzustand

Zementdispergierende polymere für selbstkompaktierenden beton mit hoher fliessfähigkeit und hoher festigkeit

Clay blocking additives for gypsum compositions

A comb polymer is used as an inerting agent for swelling clays and/or non-swelling clays in gypsum compositions, the comb polymer includes: a) at least one poly(alkylene oxide) side chain-bearing monomer unit M1 without ionic groups, b) optionally at least one cationic monomer unit MC, wherein the molar ratio of the cationic monomer units MC to the side chain-bearing monomer units M1 is equal to or less than 10, c) optionally at least one anionic monomer unit MA, wherein the molar ratio of the anionic monomer units MA to the side chain-bearing monomer units M1 is less than 1, preferably equal to or less than 0.5, d) optionally, at least one non-ionic monomer unit M3, wherein the molar ratio of the non-ionic monomer units M3 to the side chain-bearing monomer units M1 is less than 5.

Mehrzweck-, polymer-zementdispergiermittel für beton mit hoher fliessfähigkeit und festigkeit

水硬性凝結系用分散剤

【課題】第１にコンクリート組成物においても、せっこう組成物においても十分な流動化効果を示し、かつ第２に水硬性凝結系中に少量の空気空隙を導入する分散剤を提供する。つまり、多すぎる空気を導入せずに水硬性凝結組成物の十分な流動効果を達成するのに適している分散剤を提供する。 【解決手段】少なくとも１つの酸単位、少なくとも１つのエステル単位、少なくとも１つの、式(V)の化合物を含有する単位、および場合によって少なくとも１つのアミド単位を含むポリマーPを分散剤とする。 【選択図】なし

Hormigón polimérico que contiene escoria y mortero de colada

La invención se refiere a una composición aglutinante curable que comprende: a) al menos un aglutinante orgánico, seleccionado del grupo que consiste en a1) resinas epoxi y a2) poliisocianatos y polioles, y b) al menos 50% en peso de escoria, en relación con 100 % en peso de composición del aglutinante. (Traducción automática con Google Translate, sin valor legal)

Method for testing effects of sand quality on plasticizing additives in mineral binder compositions

A method for characterizing sands with regard to adsorption of plasticizing additives includes: providing an aqueous mixture of the plasticizing additive with a defined concentration of the plasticizing additive; determination of a characteristic of the aqueous mixture whereby the characteristic is related to the proportion of the plasticizing additive in the aqueous mixture; contacting a sample of sand to be analyzed with the aqueous mixture or a sample thereof, so that the sand sample is completely immersed in the aqueous mixture or the sample thereof; taking a sample of supernatant liquid from the mixture of step; determination of the same characteristic as in step b) of the sample of supernatant liquid; and comparing the characteristic obtained in step b) with the characteristic of step e) in order to decide whether the characteristics differ from each other by more than a predefined threshold or not.

Verfahren zur herstellung von amid- und estergruppen aufweisenden polymeren im festen aggregatzustand

Dispersantes para sistemas de fraguado hidraulico.

La presente invención se refiere a polímeros P como dispersantes, en particular como licuefactores, para sistemas de fraguado hidráulico, y sistemas de fraguado hidráulico que comprenden el polímero P. El polímero P comprende al menos una unidad ácido, al menos una unidad éster, y al menos una unidad que contiene tereftalato o naftalato.

Análisis de partículas digitales

Un método implementado por computadora para caracterizar partículas sólidas, especialmente, partículas de arena, que comprende las etapas de: a) proporcionar una muestra de partículas sólidas para analizar en un área de muestra predefinida; b) obtener al menos una imagen digital de la muestra de partículas sólidas con una cámara de un dispositivo informático móvil; c) realizar un análisis de imágenes de partículas de al menos una imagen digital para extraer al menos un parámetro de tamaño de partícula y/o al menos un parámetro de forma de partícula de la población de partículas en al menos una imagen digital; d) poner a disposición el al menos un parámetro de tamaño de partícula y/o el al menos un parámetro de forma de partícula a través de una interfaz de usuario, a través de una interfaz de máquina y/o en un medio de almacenamiento de datos.

Digital particle analysis

A computer-implemented method for characterization of solid particles, especially sand particles, comprises the steps of: a) Providing a sample of solid particles to be analyzed in a predefined sample area; b) Taking at least one digital image of the sample of solid particles with a camera of a mobile computer device; c) Performing an imaging particle analysis of the at least one digital image for extracting at least one particle size parameter and/or at least one particle shape parameter of the population of particles identified in the at least one digital image; d) Making available the at least one particle size parameter and/or the at least one particle shape parameter via a user interface, via a machine interface and/or on a data storage medium.

Análise digital de partículas

análise digital de partículas. um método implementado por computador para caracterização de partículas sólidas, especialmente partículas de areia, compreende as etapas de: a) fornecer uma amostra de partículas sólidas a serem analisadas em uma área de amostra predefinida; b) capturar pelo menos uma imagem digital da amostra de partículas sólidas com uma câmera de um dispositivo de computador móvel; c) realizar uma análise de partículas por imageamento da pelo menos uma imagem digital para extrair pelo menos um parâmetro de tamanho de partícula e/ou pelo menos um parâmetro de formato de partícula da população de partículas identificadas na pelo menos uma imagem digital; d) disponibilizar o pelo menos um parâmetro de tamanho de partícula e/ou o pelo menos um parâmetro de formato de partícula através de uma interface de usuário, através de uma interface de máquina e/ou em um meio de armazenamento de dados.

Digital particle analysis

A computer-implemented method for characterization of solid particles, especially sand particles, comprises the steps of: a) Providing a sample of solid particles to be analyzed in a predefined sample area; b) Taking at least one digital image of the sample of solid particles with a camera of a mobile computer device; c) Performing an imaging particle analysis of the at least one digital image for extracting at least one particle size parameter and/or at least one particle shape parameter of the population of particles identified in the at least one digital image; d) Making available the at least one particle size parameter and/or the at least one particle shape parameter via a user interface, via a machine interface and/or on a data storage medium.

Digital particle analysis

A computer-implemented method for characterization of solid particles, especially sand particles, comprises the steps of: a) Providing a sample of solid particles to be analyzed in a predefined sample area; b) Taking at least one digital image of the sample of solid particles with a camera of a mobile computer device; c) Performing an imaging particle analysis of the at least one digital image for extracting at least one particle size parameter and/or at least one particle shape parameter of the population of particles identified in the at least one digital image; d) Making available the at least one particle size parameter and/or the at least one particle shape parameter via a user interface, via a machine interface and/or on a data storage medium.

Method for testing effects of sand quality on plasticizing additives in mineral binder compositions

A method for characterizing sands with regard to adsorption of plasticizing additives comprising the steps of: a) Providing an aqueous mixture of the plasticizing additive with a defined concentration of the plasticizing additive; b) Determination of a characteristic of the aqueous mixture whereby the characteristic is related to the proportion of the plasticizing additive in the aqueous mixture; c) Contacting a sample of sand to be analyzed with the aqueous mixture or a sample thereof, so that the sand sample is completely immersed in the aqueous mixture or the sample thereof; d) Taking a sample of supernatant liquid from the mixture of step; e) Determination of the same characteristic as in step b) of the sample of supernatant liquid; f) Comparing the characteristic of the aqueous mixture or the sample thereof obtained in step b) with the characteristic of the sample of supernatant liquid of step e) in order to decide whether the characteristics differ from each other by more than a predefined threshold or not.

Metodo para evaluar los efectos de la calidad de la arena sobre los aditivos plastificantes en composiciones de aglutinantes minerales.

Un método para caracterizar arenas con respecto a la adsorción de aditivos plastificantes que comprende las etapas de: a) proporcionar una mezcla acuosa del aditivo plastificante con una concentración definida del aditivo plastificante; b) determinar una característica de la mezcla acuosa en la que la característica está relacionada con la proporción del aditivo plastificante en la mezcla acuosa; c) poner en contacto una muestra de arena a analizar con la mezcla acuosa o una muestra de esta, de modo que la muestra de arena se sumerja completamente en la mezcla acuosa o la muestra de esta; d) tomar una muestra de líquido sobrenadante de la mezcla de la etapa; e) determinar la misma característica que en la etapa b) de la muestra de líquido sobrenadante; f) comparar la característica de la mezcla acuosa o de la muestra de esta obtenida en la etapa b) con la característica de la muestra de líquido sobrenadante de la etapa e) para decidir si las características difieren entre sí por más de un umbral predefinido o no.

Método para evaluar los efectos de la calidad de la arena sobre los aditivos plastificantes en composiciones de aglutinantes minerales

Un método para caracterizar arenas con respecto a la adsorción de aditivos plastificantes que comprende las etapas de: a) proporcionar una mezcla acuosa del aditivo plastificante con una concentración definida del aditivo plastificante; b) determinar una característica de la mezcla acuosa en la que la característica está relacionada con la proporción del aditivo plastificante en la mezcla acuosa; c) poner en contacto una muestra de arena a analizar con la mezcla acuosa o una muestra de esta, de modo que la muestra de arena se sumerja completamente en la mezcla acuosa o la muestra de esta; d) tomar una muestra de líquido sobrenadante de la mezcla de la etapa; e) determinar la misma característica que en la etapa b) de la muestra de líquido sobrenadante; f) comparar la característica de la mezcla acuosa o de la muestra de esta obtenida en la etapa b) con la característica de la muestra de líquido sobrenadante de la etapa e) para decidir si las características difieren entre sí por más de un umbral predefinido o no.

Method for testing effects of sand quality on plasticizing additives in mineral binder compositions

A method for characterizing sands with regard to adsorption of plasticizing additives comprising the steps of: a) Providing an aqueous mixture of the plasticizing additive with a defined concentration of the plasticizing additive; b) Determination of a characteristic of the aqueous mixture whereby the characteristic is related to the proportion of the plasticizing additive in the aqueous mixture; c) Contacting a sample of sand to be analyzed with the aqueous mixture or a sample thereof, so that the sand sample is completely immersed in the aqueous mixture or the sample thereof; d) Taking a sample of supernatant liquid from the mixture of step; e) Determination of the same characteristic as in step b) of the sample of supernatant liquid; f) Comparing the characteristic of the aqueous mixture or the sample thereof obtained in step b) with the characteristic of the sample of supernatant liquid of step e) in order to decide whether the characteristics differ from each other by more than a predefined threshold or not.

Method for testing effects of sand quality on plasticizing additives in mineral binder compositions

A method for characterizing sands with regard to adsorption of plasticizing additives comprising the steps of: a) Providing an aqueous mixture of the plasticizing additive with a defined concentration of the plasticizing additive; b) Determination of a characteristic of the aqueous mixture whereby the characteristic is related to the proportion of the plasticizing additive in the aqueous mixture; c) Contacting a sample of sand to be analyzed with the aqueous mixture or a sample thereof, so that the sand sample is completely immersed in the aqueous mixture or the sample thereof; d) Taking a sample of supernatant liquid from the mixture of step; e) Determination of the same characteristic as in step b) of the sample of supernatant liquid; f) Comparing the characteristic of the aqueous mixture or the sample thereof obtained in step b) with the characteristic of the sample of supernatant liquid of step e) in order to decide whether the characteristics differ from each other by more than a predefined threshold or not.

Digital analysis of heterogeneous materials

A computer-implemented method for characterization of a heterogeneous material comprising distributed constituents, especially particle-shaped constituents, dispersed within a continuous phase of condensed matter, comprises the steps of: a) Providing or selecting a sample of the heterogeneous material to be analyzed; b) Taking at least one digital image of the sample with a camera of a computer device, especially a mobile computer device, or a camera connected to a computer device, especially a mobile device and/or with the computer device read in at least one digital image that was pre-recorded with a standalone camera; c) Performing an image analysis, especially an imaging particle analysis, of the at least one digital image for extracting one or more of the following properties: a size parameter, especially a particle size parameter, a shape parameter, especially a particle shape parameter, a spatial distribution, an orientation parameter, especially a particle orientation parameter, a surface parameter, especially a particle surface parameter, a roughness parameter, especially a particle roughness parameter, a packing density, a segregation parameter, a color, and/or an area share of the constituents, especially of the particle-shaped constituents, identified by the image analysis in the at least one digital image; and/or an area share of the continuous phase identified by the image analysis in the at least one digital image; d) Making available the one or more of the properties extracted in step c) via a user interface, via a machine interface and/or on a data storage medium.

Digital particle analysis

A computer-implemented method for characterization of solid particles, especially sand particles, comprises the steps of: a) Providing a sample of solid particles to be analyzed in a predefined sample area; b) Taking at least one digital image of the sample of solid particles with a camera of a mobile computer device; c) Performing an imaging particle analysis of the at least one digital image for extracting at least one particle size parameter and/or at least one particle shape parameter of the population of particles identified in the at least one digital image; d) Making available the at least one particle size parameter and/or the at least one particle shape parameter via a user interface, via a machine interface and/or on a data storage medium.

Digital particle analysis

A computer-implemented method for characterization of solid particles, especially sand particles, includes the steps of: providing a sample of solid particles to be analyzed in a predefined sample area; taking at least one digital image of the sample of solid particles with a camera of a mobile computer device; performing an imaging particle analysis of the at least one digital image for extracting at least one particle size parameter and/or at least one particle shape parameter of the population of particles identified in the at least one digital image; making available the at least one particle size parameter and/or the at least one particle shape parameter via a user interface, via a machine interface and/or on a data storage medium.

Analisis de particulas digitales.

Un método implementado por computadora para caracterizar partículas sólidas, especialmente, partículas de arena, que comprende las etapas de: a) proporcionar una muestra de partículas sólidas para analizar en un área de muestra predefinida; b) obtener al menos una imagen digital de la muestra de partículas sólidas con una cámara de un dispositivo informático móvil; c) realizar un análisis de imágenes de partículas de al menos una imagen digital para extraer al menos un parámetro de tamaño de partícula y/o al menos un parámetro de forma de partícula de la población de partículas en al menos una imagen digital; d) poner a disposición el al menos un parámetro de tamaño de partícula y/o el al menos un parámetro de forma de partícula a través de una interfaz de usuario, a través de una interfaz de máquina y/o en un medio de almacenamiento de datos.

Comb polymers as blocking additives for swelling clays

A method for inerting a swellable clay and/or for reducing or inhibiting adverse effects of swellable clays on the effectiveness of dispersants in mineral binder compositions, includes adding a comb polymer to a mineral binder composition. The comb polymer includes: at least one poly(alkylene oxide) side chain-bearing monomer unit without ionic groups, optionally at least one cationic monomer unit, optionally at least one anionic monomer unit, and optionally, at least one non-ionic monomer unit.

Polímeros en forma de peine como aditivos bloqueadores para arcillas expansivas

Un polímero en forma de peine, en particular para su uso como agente inertizante de arcilla, comprende:a) al menos una unidad monomérica portadora de cadenas laterales de poli (óxido de alquileno) M1 sin grupos iónicos, b) opcionalmente al menos una unidad monomérica catiónica MC,c) opcionalmente al menos una unidad monomérica aniónica MA,c) opcionalmente, al menos una unidad monomérica no iónica M3, en donde la relación molar de las unidades monoméricas catiónicas MC respecto a las unidades monoméricas portadoras de cadenas laterales M1 es igual o menor que 10, la relación molar de las unidades monoméricas aniónicas MA respecto a las unidades monoméricas portadoras de cadenas laterales M1 es menor que 1, preferiblemente igual o menor que 0,5, y la relación molar de las unidades monoméricas no iónicas M3 respecto a las unidades monoméricas portadoras de cadenas laterales M1 es menor que 5.

Comb polymers as blocking additives for swelling clays

A comb polymer, in particular for use as a clay-inerting agent, comprises: a) at least one poly(alkylene oxide) side chain-bearing monomer unit M1 without ionic groups, b) optionally at least one cationic monomer unit MC, c) optionally at least one anionic monomer unit MA, c) optionally, at least one non-ionic monomer unit M3, wherein the molar ratio of the cationic monomer units MC to the side chain-bearing monomer units M1 is equal to or less than 10, the molar ratio of the anionic monomer units MA to the side chain-bearing monomer units M1 is less than 1, preferably equal to or less than 0.5, and the molar ratio of the non-ionic monomer units M3 to the side chain-bearing monomer units M1 is less than 5.

Comb polymers as blocking additives for swelling clays

A method includes adding (i) a comb polymer and (ii) a plasticizer to a mineral binder composition comprising swellable clays. The comb polymer includes: at least one poly(alkylene oxide) side chain-bearing monomer unit without ionic groups, optionally at least one cationic monomer unit, optionally at least one anionic monomer unit, and optionally, at least one non-ionic monomer unit, wherein a molar ratio of the cationic monomer units to the side chain-bearing monomer units is equal to or less than 10, a molar ratio of the anionic monomer units to the side chain-bearing monomer units is less than 1, and a molar ratio of the non-ionic monomer units to the side chain-bearing monomer units is less than 5.

Slag-containing polymer concrete and grouting mortar

A curable binder composition includes: a) at least one organic binder selected from the group made of a1) epoxy resins and curing agents for epoxy resins and a2) polyisocyanates and polyols, and b) at least 50% by weight of slag based on 100% by weight of the binder composition.