Foamed concrete

A foamed concrete having a density from 100 to 800 kg/m 3 including by mass relative to the total mass of the concrete: a cement; water; from 0.01 to 5% of a water-reducing agent, plasticizer or superplasticizer; from 0.45 to 5% of a foaming agent relative to the amount of water; from 0.01 to 5% of a water-soluble calcium salt; inorganic particles from 0.1 to 300 μm in size; the ratio of foaming agent to calcium salt being from 0.3 to 0.8; the foamed concrete including 10% or more by mass of slag.

FOAMED CONCRETE

concreto espumado, a invenção proporciona um concreto espumado tendo uma densidade de 100 a 800kg / m³ que compreende, em massa em relação à massa total do concreto: - um cimento; - água; - a partir de 0,01 a 5% de um agente redutor de água, plastificante ou superplastificante ; de 0,45 a 5% de um sal de cálcio solúvel em água; - partículas inorgâ de 0,1 a 300 um em tamanho, a proporção de agente formador de espuma de sal de cálcio sendo 0,3 a 0,8; excluindo concreto espumado que compreende 10% ou mais em massa de escória; elementos formados compreendendo o concreto espumado, um processo para a preparação do concreto espumado. foamed concrete, the invention provides a foamed concrete having a density of from 100 to 800kg / m³ comprising, by mass in relation to the total mass of the concrete: - a cement; - Water; from 0.01 to 5% of a water reducing, plasticizing or superplasticising agent; from 0.45 to 5% of a water soluble calcium salt; inorganic particles from 0.1 to 300 µm in size, the proportion of calcium salt foaming agent being 0.3 to 0.8; excluding foamed concrete comprising 10% or more by mass of slag; elements formed comprising foamed concrete, a process for the preparation of foamed concrete.

Method for preparing silver halide photographic tabular grains emulsions

The invention relates to a method for preparing photographic silver halide tabular grains emulsions. The method of the invention comprises a first single nucleation step wherein stable tabular seeds of silver halide are formed, and a second step wherein different batches of seeds obtained in the first step are grown to yield identical or different emulsions. This combination of steps represent a robust process for preparing tabular grain emulsions at different scales.

Foamed concrete

A foamed concrete having a density from 100 to 800 kg/m3 including by mass relative to the total mass of the concrete: a cement; water; from 0.01 to 5% of a water-reducing agent, plasticizer or superplasticizer; from 0.45 to 5% of a foaming agent relative to the amount of water; from 0.01 to 5% of a water-soluble calcium salt; inorganic particles from 0.1 to 300 μm in size; the ratio of foaming agent to calcium salt being from 0.3 to 0.8; excluding foamed concretes including 10% or more by mass of slag.

Method of preparing a silver halide photographic emulsion

A method for the preparation of silver haloiodide photographic emulsions, in particular the preparation of tabular grains haloiodide photographic emulsions. The method comprises the steps of adding pulsed jets of iodide salt and silver salt to a host emulsion.

Method for preparing silver halide photographic tabular grains emulsions

The invention relates to a method for preparing photographic silver halide tabular grains emulsions. The method of the invention comprises a first single nucleation step wherein stable tabular seeds of silver halide are formed, and a second step wherein different batches of seeds obtained in the first step are grown to yield identical or different emulsions. This combination of steps represent a robust process for preparing tabular grain emulsions at different scales.

NEW FOAMED CONCRETE

A foamed concrete having a density from 100 to 800 kg/mincluding by mass relative to the total mass of the concrete: a cement; water; from 0.01 to 5% of a water-reducing agent, plasticizer or superplasticizer; from 0.45 to 5% of a foaming agent relative to the amount of water; from 0.01 to 5% of a water-soluble calcium salt; inorganic particles from 0.1 to 300 μm in size; the ratio of foaming agent to calcium salt being from 0.3 to 0.8; the foamed concrete including 10% or more by mass of slag. 1. A foamed concrete having a density from 200 to 800 kg/mcomprising by mass relative to the total mass of the concretea cement;water;from 0.01 to 5% of a water-reducing agent, plasticizer or superplasticizer;from 0.45 to 5% of a foaming agent relative to the amount of water;a water-soluble calcium salt having a solubility in water at 20° C. greater than 2 g/100 ml;inorganic particles from 0.1 to 300 μm in size;a ratio of foaming agent to calcium salt being from 0.3 to 0.8; the foamed concrete comprising 10% or more by mass of slag particles.2. The foamed concrete according to claim 1 , wherein the inorganic particles comprise calcium carbonate claim 1 , silica fume claim 1 , slag claim 1 , fly ash claim 1 , pozzolan claim 1 , glass claim 1 , siliceous filler or a mixture thereof.3. The foamed concrete according to having a density from 300 to 700 kg/m.4. The foamed concrete according to claim 1 , wherein the foaming agent is selected from an alkyl sulfonate claim 1 , an alkyl ether sulfonate claim 1 , a hydroxyalkyl ether sulfonate claim 1 , an alpha olefin sulfonate claim 1 , an alkyl benzene sulfonate claim 1 , an alkyl sulphate claim 1 , an alkyl ether sulphate claim 1 , a hydroxyalkyl ether sulphate claim 1 , an alpha olefin sulphate and an alkyl benzene sulphate and mixtures thereof.6. The foamed concrete according to claim 5 , wherein the foaming agent is a linear or branched alkyl ether sulphate of said formula in which n is from 10 to 12 and m is from 1 to 6.7. The ...

Method of preparing a silver halide photographic emulsion

A method for the preparation of silver haloiodide photographic emulsions, in particular the preparation of tabular grains haloiodide photographic emulsions. The method comprises the steps of adding pulsed jets of iodide salt and silver salt to a host emulsion.

FOAMED CONCRETE

Process for preparing a photographic emulsion comprising silver halide grains with high silver chloride content

A process for the preparation of a high chloride silver halide grain emulsion in which at least 50% of the projected area of the emulsion grains is accounted for by cubic grains, said process comprising:i) precipitating an intermediate emulsion containing high chloride cubic nuclei having an average edge length less than or equal to 0.07 mum, by adding to an external continuous reactor at least one silver salt aqueous solution, a chloride salt aqueous solution and a hydrophilic colloid aqueous solution, in conditions so that (Qgel*Tgel)/(Qag*CAg) is more than 100, wherein Qgel is the flow rate of the hydrophilic colloid aqueous solution, Tgel is the hydrophilic colloid content of the hydrophilic colloid solution (g/l), QAg is the flow rate of the silver salt aqueous solution, CAg is the silver concentration of the silver salt aqueous solution (mole/l) and is comprised between 0.01 and 5 moles/l, the average pCl in the external reactor being between 1.7 and 3.5,ii) continuously transferring ...

Method for the continuous production of a low-density mineral foam

A method for the continuous production of a mineral foam of which the density in the dry state (d) is from 40 to 600 kg/m3, includes (i) mixing cement; a water reducing agent; 0.5 to 10%, % by weight with respect to the total weight of cement, of ultrafine particles having a liquid-solid contact angle comprised from 30° to 140°, and of which the D50 is from 10 to 600 nm; water, with a water/cement weight ratio from 0.3 to 2.5; (ii) adding to the mixture from 0.5 to 10% of a pore-forming agent, % by weight with respect to the weight of cement; (iii) applying the mixture obtained at step (ii) on a support; (iv) leaving the mixture to expand on the support.

FOAMED CONCRETE

A foamed concrete having a density from 100 to 800 kg/m 3 including by mass relative to the total mass of the concrete: a cement; water; from 0.01 to 5% of a water-reducing agent, plasticizer or superplasticizer; from 0.45 to 5% of a foaming agent relative to the amount of water; from 0.01 to 5% of a water-soluble calcium salt; inorganic particles from 0.1 to 300 μm in size; the ratio of foaming agent to calcium salt being from 0.3 to 0.8; excluding foamed concretes including 10% or more by mass of slag.

SOUND-ABSORBING, RESISTANT PANELS AND PROCESS FOR MAKING SAME

A composition includes a set hydraulic binder; and a foaming agent and has a porosity 0.55; a flow resistivity between 10000 and 200000 N.s.m-4; a tortuosity between 1.2 and 3.4; a viscous characteristic length between 10 m and 60 m; a thermal characteristic length between 60 m and 1000 m; and a compressive strength of at least 0.30 MPa as measured by modified ASTM C472.

Online control of rheology of building material for 3d printing

A method of placing a flowable construction material including a hydraulic binder for building structural components layer-by-layer, such as for 3D concrete printing, the method including preparing a fresh flowable construction material made of Portland cement, fine limestone filler materials, fine sands, water, and water reducing admixture and possibly a set or hardening accelerating admixture, conveying the flowable construction material to a deposition head, placing the construction material through an outlet of the deposition head in order to form a layer of construction material, before placing the construction material, adding a rheology-modifying agent to the construction material so that the placed material has an increased yield stress when compared to the material during the conveying step.

SOUND-ABSORBING, RESISTANT PANELS AND PROCESS FOR MAKING SAME

A process of making a sound-absorbing panel, including a. pre-mixing gypsum plaster with water; b. adding a glycoside compound; c. injecting air into the obtained slurry of step b) and mixing; d. casting the aerated slurry; e. setting the cast slurry. 129-. (canceled)30. A process of making a sound-absorbing panel , comprising:a. pre-mixing gypsum plaster with water;b. adding a glycoside compound;c. injecting air into the obtained slurry of step b) and mixing;d. casting the aerated slurry, ande. setting the cast slurry.31. The process of claim 30 , wherein the glycoside compound is the sole foaming agent.32. The process of claim 30 , wherein fibers represent less than 0.01% by weight of the set gypsum plaster.33. The process as claimed in claim 30 , wherein the glycoside compound is an alkylpolyglycoside or alkylpolyglucoside.34. The process of claim 33 , wherein the glycoside compound is a C4-C16 alkylpolyglycoside or a C4-C16 alkylpolyglucoside.35. The process of claim 30 , wherein step a) comprises pre-mixing the gypsum plaster with water and a blocking agent.36. The process of claim 30 , further comprising introducing an unblocking agent into the aerated slurry.37. The process of claim 30 , wherein step a) comprises pre-mixing the gypsum plaster with water and a retarding agent.38. The process of claim 30 , wherein the casting of the aerated slurry comprises depositing the aerated slurry onto a facer claim 30 , said process further comprising:covering the deposited slurry with another facer,forming a ribbon from the deposited slurry, andcutting the ribbon into panels.39. The process as claimed in claim 30 , further comprising depositing the aerated slurry into moulds. This application is a continuation of U.S. application Ser. No. 12/747,057, filed on Jun. 9, 2010, which is the U.S. National Stage of PCT/IB2008/003757, filed Dec. 9, 2008, which in turn claims priority to European Patent Application No. 07356174.8, filed Dec. 10, 2007, the entire contents of all ...

METHOD FOR THE CONTINUOUS PRODUCTION OF A LOW-DENSITY MINERAL FOAM

A method for the continuous production of a mineral foam of which the density in the dry state (d) is from 40 to 600 kg/m, includes (i) mixing cement; a water reducing agent; 0.5 to 10%, % by weight with respect to the total weight of cement, of ultrafine particles having a liquid-solid contact angle comprised from 30° to 140°, and of which the D50 is from 10 to 600 nm; water, with a water/cement weight ratio from 0.3 to 2.5; (ii) adding to the mixture from 0.5 to 10% of a pore-forming agent, % by weight with respect to the weight of cement; (iii) applying the mixture obtained at step (ii) on a support; (iv) leaving the mixture to expand on the support. 113-. (canceled)14- A method for the continuous production of a mineral foam of which the density in the dry state (d) is comprised from 40 to 600 kg/m , comprising the following steps: cement;', 'a water reducing agent;', '0.5 to 10%, % by weight with respect to the total weight of cement, of ultrafine particles having a liquid-solid contact angle comprised from 30° to 140°, and of which the D50 is comprised from 10 to 600 nm;', 'water, with a water/cement weight ratio comprised from 0.3 to 2.5;, '(i) mixing'}(ii) adding to the mixture from 0.5 to 10% of a pore-forming agent, % by weight with respect to the weight of cement;(iii) applying the mixture obtained at step (ii) on a support;(iv) leaving the mixture to expand on the support.15- The method according to claim 14 , wherein the cement of the mixture of step (i) is a cement of which the Blaine specific surface area is comprised from 5000 to 9000 cm/g.16- The method according to claim 14 , wherein there is no foaming agent in the mixture of step (i) or (ii).17- The method according to claim 14 , wherein the mixture of step (i) or step (ii) further comprises a transition metal salt.18- The method according to claim 17 , wherein the transition metal salt is a manganese salt or an iron salt.19- The method according to claim 14 , wherein the mixture of step (i) ...

PROCESS FOR PREPARING A PHOTOGRAPHIC EMULSION AND APPARATUS FOR IMPLEMENTING THE PROCESS

PROCESS FOR THE PREPARATION OF A PHOTOGRAPHIC EMULSION COMPRISING GRAINS OF SILVER HALIDES WITH HIGH SILVER CHLORIDE RATES

Online control of rheology of building material for 3d printing

Online control of rheology of building material for 3D printing A method of placing a flowable construction material comprising a hydraulic binder for building structural components layer-by-layer, such as for 3D concrete printing, said method comprising: preparing a fresh flowable construction material made of Portland cement, fine limestone filler materials, fine sands, water, and water reducing admixture and possibly a set or hardening accelerating admixture, conveying the flowable construction material to a deposition head (10), placing the construction material through an outlet of the deposition head (10) in order to form a layer of construction material, before placing the construction material, adding a rheology-modifying agent to the construction material so that the placed material has an increased yield stress when compared to the material during the conveying step.

Method for the continuous production of a low-density mineral foam

The invention relates to a method for producing a low-density mineral foam. The invention also relates to the use of said mineral foam as an insulating material.

PROCESS FOR THE PREPARATION OF A PHOTOGRAPHIC EMULSION COMPRISING GRAINS OF SILVER HALIDES WITH HIGH SILVER CHLORIDE RATES

La présente invention concerne un nouveau procédé de préparation d'une émulsion photographique aux halogénures d'argent à haut taux de chlorure et à grains cubiques.Ce procédé présente une reproductibilité et une robustesse améliorées par rapport aux procédés existants. The present invention relates to a new process for the preparation of a photographic emulsion with silver halides with a high chloride content and with cubic grains. This process has improved reproducibility and robustness compared to existing processes.

New foamed concrete

The invention provides a foamed concrete having a density from 100 to 800kg/m3 comprising by mass relative to the total mass of the concrete: a cement; - water; from 0.01 to 5% of a water-reducing agent, plasticizer or superplasticizer; - from 0.45 to 5% of a foaming agent relative to the amount of water; from 0.01 to 5% of a water-soluble calcium salt; inorganic particles from 0.1 to 300µm in size; the ratio of foaming agent to calcium salt being from 0.3 to 0.8; the foamed concrete comprising 10% or more by mass of slag; shaped elements comprising the foamed concrete; and a process for the preparation of the foamed concrete.

EMULSION WITH TABULAR SILVER HALIDES AND PHOTOGRAPHIC PRODUCT CONTAINING THE SAME

La présente invention concerne une émulsion photosensible aux halogénures d'argent. L'émulsion selon l'invention est constituée essentiellement de grains tabulaires de bromure d'argent à faces principales (100). Application à l'amélioration des propriétés sensitométriques des émulsions photographiques. The present invention relates to a photosensitive silver halide emulsion. The emulsion according to the invention consists essentially of tabular grains of silver bromide with main faces (100). Application to the improvement of the sensitometric properties of photographic emulsions.

METHOD FOR PREPARING PHOTOGRAPHIC EMULSIONS WITH TABULAR GRAINS OF SILVER BROMIDE WITH FACE (100)

Sound-absorbing, resistant panels and process for making same

The present invention relates to sound- absorbing panels and to a process for making the same, as well as to a composition useful for making the abovementioned sound-absorbing panels.

Method for the continuous production of a low-density mineral foam

METHOD FOR PREPARING PHOTOGRAPHIC EMULSIONS WITH TABULAR GRAINS OF SILVER HALIDES

Process for Making A Sound-Absorbing Panel

Adjuvant, useful for hydraulic binder for the manufacture of elements for the construction field, comprises e.g. alkyl sulfonate, alphaolefinsulfate and/or alkylbenzenesulfate; and calcium salt soluble in water

Adjuvant (I) comprises: an alkyl sulfonate, an alkylethersulfonate, a hydroxyalkylethersulfonate, an alphaolefinsulfonate, an alkyl benzene sulfonate, an alkyl sulfate, an alkyl ethersulfate, a hydroxyalkylethersulfate, an alphaolefinsulfate and/or alkylbenzenesulfate; and a calcium salt soluble in water. Independent claims are included for: (1) hydraulic binder comprising the adjuvant; (2) hydraulic composition comprising the hydraulic binder; (3) lightweight concrete comprising the composition; (4) manufacturing a hydraulic composition comprises contacting the adjuvant, water and the hydraulic binder; (5) manufacturing a lightweight concrete comprising introducing gas into the hydraulic composition; and (6) element for construction field, made of the hydraulic binder, hydraulic composition or lightweight concrete.

PROCESS FOR PREPARING PHOTOGRAPHIC EMULSION AND APPARATUS FOR IMPLEMENTING THE METHOD

L'invention concerne un procédé et un dispositif pour la préparation d'une émulsion photographique. Dans le dispositif du type à boucle de circulation externe selon l'invention, une solution d'un premier sel d'halogénure X1-- est introduite en un point 31 de la boucle située en dehors de la zone de réaction R à l'intérieur de laquelle un sel d'argent (Ag**+) ajouté dans la boucle précipite dans sa quasi-totalité pour générer ou faire croître des grains d'halogénure d'argent, la solution d'Ag**+ étant introduite dans le réacteur 12 sous forme d'un jet "centré" à l'intérieur dudit réacteur, le nombre de Reynolds Re au niveau du point d'introduction (30) du sel d'Ag**+ étant compris entre environ 5 000 et environ 50 000. Application à la préparation d'émulsions photographiques aux halogénures d'argent. The invention relates to a method and a device for the preparation of a photographic emulsion. In the device of the type with an external circulation loop according to the invention, a solution of a first halide salt X1-- is introduced at a point 31 of the loop situated outside the reaction zone R inside of which a silver salt (Ag ** +) added in the loop precipitates almost entirely to generate or grow silver halide grains, the Ag ** + solution being introduced into the reactor 12 in the form of a jet "centered" inside said reactor, the Reynolds number Re at the point of introduction (30) of the Ag ** + salt being between approximately 5,000 and approximately 50,000 Application to the preparation of photographic emulsions with silver halides.

Process for making a sound-absorbing panel

High chloride (100) tabular grain emulsions: improved emulsions and improved precipitation processes.

Prepn. of photographic emulsion having predetermined grain size - using first reactor to receive silver salt and halide solutions and second reactor to receive emulsion

A first reactor (1) contains a soln. of gelatine which is stirred by an agitator (5). Pumps (2,3) introduce silver salt and halide solns. into the reactor (1) which form grains of a silver halogen cpd. The grains then continue to grow at a controlled speed. During this period a peristaltic pump (4) propels the mono-dispersed emulsion into a second reactor (2) with agitator (7). The operation of the three pumps (2,3,4) is computer (8) controlled to ensure the desired pptn. characteristics in the first reactor and the required distribution of grain size in the second reactor. ADVANTAGE - Photographic emulsion having predetermined distribution of grain size may be produced.

Method for the continuous production of a low-density mineral foam

La présente invention se rapporte à un procédé de fabrication d'une mousse minérale à basse densité. L'invention a aussi pour objet l'utilisation de cette mousse minérale comme matériau isolant.

PROCESS FOR PREPARING A PHOTOGRAPHIC EMULSION WITH SILVER HALIDES

Silver halide emulsion with large tabular grains with a high bromide

The present invention concerns a novel silver halide emulsion containing fine tabular grains having a high aspect ratio as well as a method of preparing this emulsion. It also concerns a novel photographic product containing such an emulsion. The emulsion of the present invention is particularly advantageous for high-sensitivity photographic products.

BUILDING ELEMENT IN INSULATING LIGHT CONCRETE

LARGE SIZE HIGH BROMIDE TABULAR GRAIN SILVER HALIDE EMULSION

La présente invention concerne une nouvelle émulsion aux halogénures d'argent contenant des grains tabulaires fins ayant un indice de forme élevé ainsi qu'un procédé de préparation de cette émulsion.Elle concerne aussi un nouveau produit photographique contenant une telle émulsion.L'émulsion de la présente invention est particulièrement intéressante pour les produits photographiques à grande sensibilité. The present invention relates to a new silver halide emulsion containing fine tabular grains having a high shape index as well as to a process for preparing this emulsion. It also relates to a new photographic product containing such an emulsion. the present invention is particularly advantageous for photographic products with high sensitivity.

Sound-absorbing, resistant panels and process for making same

Process for preparing a photographic emulsion comprising silver halide grains with high silver chloride content

A process for the preparation of a high chloride silver halide grain emulsion in which at least 50% of the projected area of the emulsion grains is accounted for by cubic grains, said process comprising : i) precipitating an intermediate emulsion containing high chloride cubic nuclei having an average edge length less than or equal to 0.07 µm, by adding to an external continuous reactor at least one silver salt aqueous solution, a chloride salt aqueous solution and a hydrophilic colloid aqueous solution, in conditions so that (Qgel*Tgel)/(Qag*CAg) is more than 100, wherein Qgel is the flow rate of the hydrophilic colloid aqueous solution, Tgel is the hydrophilic colloid content of the hydrophilic colloid solution (g/l), QAg is the flow rate of the silver salt aqueous solution, CAg is the silver concentration of the silver salt aqueous solution (mole/l) and is comprised between 0.01 and 5 moles/l, the average pCl in the external reactor being between 1.7 and 3.5, ii) continuously transferring the intermediate emulsion containing the cubic nuclei from the external continuous reactor to a storage vessel, iii) stabilizating the nuclei by the addition of a growth inhibitor in an amount such as the nuclei coverage by the growth inhibitor is at least 20%, and iv) growing the nuclei of the intermediate emulsion to obtain a high chloride emulsion comprising cubic grains by adding a silver salt aqueous solution and a halide salt aqueous solution provided that the silver salt solution is added with a flow rate that does not lead the formation of new stable nuclei.

Sound-absorbing, resistant panels and process for making same

The present invention relates to sound- absorbing panels and to a process for making the same, as well as to a composition useful for making the abovementioned sound- absorbing panels.

Method for obtaining monodispersed tabular grains

A method for preparing a photographic emulsion incorporating tabular silver halide grains is described. It is characterized in that twinned silver halide nuclei are precipitated either in an external static nucleator operating under laminar conditions with a Reynolds number of less than 2100, or in a recipient with a very low agitation speed compared with that normally used, and characterized also in that the concentration of the Ag+ ion solution is between 0.04 and 0.3 M. Tabular silver halide grains are obtained with a diameter distribution lower than 15 %.

Process and device for the preparation of polydispersed photographic emulsions with predefined particle size characteristics.

Method for the continuous production of a low-density mineral foam

Method of production of a mineral foam obtained from a foaming slurry of high yield stress

Method of production of a mineral foam obtained from a foaming slurry of high yield stress

Method of production of a mineral foam obtained from a foaming slurry of high yield stress

The invention relates to a method for the continuous production of a low density mineral foam comprising the following steps (i) preparing a cement slurry comprising -cement, ultrafine particles of which the D50 is comprised from 10 to 600 nm, -a water reducing agent, a manganese salt, and water; (n) adding to the cement slurry obtained after step (i) a gas-forming liquid comprising a gas-forming agent, and a viscosity-modifying agent which is a polymer chosen among anionic bio- based polymer, amphiphilic bio-based polymer, alkali swellable acrylic polymer and mixture thereof, to obtain a foaming slurry, (in) applying the foaming slurry obtained at step (n) on a support, (iv) leaving the foaming slurry to expand on the support.

Verfahren zur Herstellung von Silberhalogenidemulsionen unter Verwendung von Reaktoren mit Mikroreaktionszone

Online control of rheology of building material for 3D printing

A method of placing a flowable construction material including a hydraulic binder for building structural components layer-by-layer, such as for 3D concrete printing, the method including preparing a fresh flowable construction material made of Portland cement, fine limestone filler materials, fine sands, water, and water reducing admixture and possibly a set or hardening accelerating admixture, conveying the flowable construction material to a deposition head, placing the construction material through an outlet of the deposition head in order to form a layer of construction material, before placing the construction material, adding a rheology-modifying agent to the construction material so that the placed material has an increased yield stress when compared to the material during the conveying step.

Verfahren zur Herstellung von Silberhalogenidemulsionen unter Verwendung von Reaktoren mit Mikroreaktionszone

Verfahren zur herstellung monodisperser tafelförmiger körner.

Verfahren zur herstellung monodisperser tafelförmiger körner.