WO2011029979A2 - Method for producing strong, lightweight materials - Google Patents

Method for producing strong, lightweight materials Download PDF

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Publication number
WO2011029979A2
WO2011029979A2 PCT/ES2010/070589 ES2010070589W WO2011029979A2 WO 2011029979 A2 WO2011029979 A2 WO 2011029979A2 ES 2010070589 W ES2010070589 W ES 2010070589W WO 2011029979 A2 WO2011029979 A2 WO 2011029979A2
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WO
WIPO (PCT)
Prior art keywords
microspheres
manufacture
resistant
materials
lighted
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Application number
PCT/ES2010/070589
Other languages
Spanish (es)
French (fr)
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WO2011029979A3 (en
Inventor
José Antonio NAVIA GARCIA
Original Assignee
Ibercal Morteros, S.L.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
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Application filed by Ibercal Morteros, S.L. filed Critical Ibercal Morteros, S.L.
Publication of WO2011029979A2 publication Critical patent/WO2011029979A2/en
Publication of WO2011029979A3 publication Critical patent/WO2011029979A3/en

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Classifications

    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02Compositions 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
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B20/00Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
    • C04B20/0016Granular materials, e.g. microballoons
    • C04B20/002Hollow or porous granular materials
    • C04B20/0036Microsized or nanosized
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/40Porous or lightweight materials

Definitions

  • the invention refers to a process for the manufacture of lightened resistant materials, contributing to the function to which notable advantages and novelty characteristics are intended, which will be described in detail below, which represent a remarkable improvement over other systems currently known in the state of the art for the same purpose.
  • the invention develops a process that aims to manufacture lightened materials by incorporating in them microspheres that, hollow or containing different substances, achieve such lightening while maintaining a high degree of resistance of the material itself, being applicable to any type of material, but especially to building materials.
  • microspheres previously manufactured for this purpose which can be hollow or contain various substances inside.
  • said microspheres are first manufactured from a spherical matrix, formed by any element, material or substance, which is covered with another material, so that a sphere is obtained whose walls are of a material other than the one inside, preferably the inner material being a material or substance of lower density than the outer material.
  • This coating can be carried out, for example, by incorporating the matrix spheres into a rotating bowl or drum in which a polymer additive is incorporated to form a sticky substance to which the outer material adheres.
  • both the polymer additive and said interior material can be extinguished by incorporation into an oven, thus obtaining hollow micro spheres.
  • Said micro spheres may be incorporated into the material that is intended to be lightened during its normal manufacturing process.
  • the degree of lightening and resistance of said material will depend on the size and number of micro spheres that it incorporates, but it will always be more resistant than other material of the same type obtained through the conventional air incorporation system, since, unlike of these, The material obtained by means of the described procedure will contain microspheres that may have the desired resistance in each case, and therefore, much greater.
  • this lightened material if poured into a mold, allows to obtain pieces with their smooth and homogeneous faces, without appreciating the multiple gaps of their inner mass.
  • Figures 1 and 2 show two sectional views of the microspheres that are incorporated in the material for lightening, according to the process object of the invention, in its manufacturing phases and elimination of its internal content, respectively.
  • Figure number 3.- Shows a schematic and sectional view of an example of lightened resistant material, already finished according to the process of the invention.
  • microspheres are manufactured (1) , which may be hollow or contain any substance or material.
  • a spherical matrix (2) formed by any element, material or substance, for example expanded polystyrene, which is covered with a different external material (3), for example cement, so that a sphere whose walls are of a different material than the one inside (figure 1).
  • a rotating bowl or drum is used in which a polymer additive is incorporated to form a sticky substance (4) on the polystyrene balls, which constitute the said matrix (2) of the microspheres.
  • the external material (3) is added, in this case cement powder so that it adheres to said balls and completely covers them to form the external material (3) of the microspheres.
  • the result obtained are microspheres (1) formed by an inner material that is the spherical matrix (2) and by a different outer material (3).
  • microspheres (1) if the material permits, as in the aforementioned example, are introduced into an oven until the polymer and the polystyrene of its interior are extinguished, that is, the internal spherical matrix (2), obtaining a microsphere ( 1) hollow (figure 2).
  • microspheres (1) whether they are hollow or not and that may have the desired resistance, are incorporated into the material (5) that is intended to be lightened during its normal manufacturing process.
  • the mentioned cement microspheres if they are incorporated as aggregate into a mass with water and cement, allow to obtain a very resistant and lightened concrete, but made only of cement.

Abstract

Method for producing strong, lightweight materials, characterized in that it comprises the following steps: first, microspheres (1), which may be hollow or contain any substance or material, and the walls of which are made from a material different from that contained within, are produced; said microspheres (1) are incorporated into the material (5) to be lightened during the normal production process thereof.

Description

PROCESO PARA LA FABRICACIÓN DE MATERIALES ALIGERADOS PROCESS FOR THE MANUFACTURE OF LIGHTENED MATERIALS
RESISTENTES RESISTANT
D E S C R I P C I O N D E S C R I P C I O N
OBJETO DE LA INVENCIÓN OBJECT OF THE INVENTION
La invención, tal como expresa el enunciado de la presente memoria descriptiva, se refiere a un proceso para la fabricación de materiales aligerados resistentes, aportando a la función a que se destina notables ventajas y características de novedad, que se describirán en detalle más adelante, que suponen una destacable mejora frente a otros sistemas actualmente conocidos en el estado de la técnica para el mismo fin. The invention, as stated in the present specification, refers to a process for the manufacture of lightened resistant materials, contributing to the function to which notable advantages and novelty characteristics are intended, which will be described in detail below, which represent a remarkable improvement over other systems currently known in the state of the art for the same purpose.
Más en particular, la invención desarrolla un procedimiento que tiene como finalidad fabricar materiales aligerados mediante la incorporación en ellos de microesferas que, huecas o conteniendo distintas sustancias, consiguen dicho aligeramiento manteniendo un alto grado de resistencia del propio material, siendo aplicable a cualquier tipo de material, pero especialmente a los materiales de construcción . More particularly, the invention develops a process that aims to manufacture lightened materials by incorporating in them microspheres that, hollow or containing different substances, achieve such lightening while maintaining a high degree of resistance of the material itself, being applicable to any type of material, but especially to building materials.
ANTECEDENTES DE LA INVENCIÓN BACKGROUND OF THE INVENTION
Como es sabido, la única forma conocida hasta ahora para aligerar un material determinado, es mediante la incorporación de aire a su masa durante el proceso de fabricación del mismo. As is known, the only way known so far to lighten a certain material, is by incorporating air into its mass during its manufacturing process.
La fabricación de material poroso mediante la incorporación de aire tiene como ventaja la reducción de su densidad, pero el principal inconveniente es que pierde resistencia mecánica. Es pues, el objetivo de la presente invención aportar al estado de la técnica un innovador sistema para proporcionar a los materiales las ventajas de un material poroso pero evitando los inconvenientes de la pérdida de resistencia mecánica que éstos presentan, debiendo señalarse que, por parte del solicitante, se desconoce la existencia de ninguna otra invención que presente unas características técnicas semejantes a las que presenta el proceso aquí preconizado. The manufacture of porous material through The incorporation of air has the advantage of reducing its density, but the main drawback is that it loses mechanical resistance. It is therefore the objective of the present invention to provide the state of the art with an innovative system to provide the materials with the advantages of a porous material but avoiding the disadvantages of the loss of mechanical resistance that these present, it should be noted that, by the applicant, it is unknown the existence of any other invention that has similar technical characteristics to those presented in the process described here.
EXPLICACIÓN DE LA INVENCIÓN EXPLANATION OF THE INVENTION
Así, el proceso para la fabricación de materiales aligerados resistentes que la presente invención propone se configura como una destacable novedad dentro de su campo de aplicación, ya que, a tenor de su implementación y de forma taxativa, se alcanzan satisfactoriamente los objetivos anteriormente señalados como idóneos, estando los detalles caracterizadores que lo hacen posible y lo distinguen de lo ya conocido en el mercado, desarrollados a continuación y recogidos en las reivindicaciones finales que acompañan a la presente memoria descriptiva . Thus, the process for the manufacture of resistant lightened materials that the present invention proposes is configured as a remarkable novelty within its field of application, since, according to its implementation and in a restrictive manner, the aforementioned objectives are satisfactorily achieved as suitable, being the characterizing details that make it possible and distinguish it from what is already known in the market, developed below and included in the final claims that accompany this specification.
De manera concreta lo que la invención preconiza es un proceso para la fabricación de materiales aligerados resistentes, es decir, que al ser aligerados no pierdan sus características de resistencia mecánica, mediante la incorporación en los mismos, durante su fabricación, de unas microesferas previamente fabricadas para tal fin, las cuales pueden ser huecas o contener en su interior diversas sustancias . Para ello, tal como se ha dicho, en primer lugar se fabrican dichas microesferas a partir de una matriz esférica, formada por cualquier elemento, material o sustancia, que se cubre con otro material distinto, de forma que se obtiene una esfera cuyas paredes son de un material distinto al que contiene en su interior, siendo, preferentemente, el material interior un material o sustancia de menor densidad que el material exterior. Este recubrimiento se puede realizar, por ejemplo, mediante la incorporación de las esferas matriz en una cuba o bombo giratorio en el que se incorpora un aditivo polímero para que forme una sustancia pegajosa a la que se adhiera el material exterior. Specifically, what the invention advocates is a process for the manufacture of lightened resistant materials, that is, when lightened they do not lose their characteristics of mechanical resistance, by incorporating in them, during their manufacture, microspheres previously manufactured for this purpose, which can be hollow or contain various substances inside. To do this, as stated above, said microspheres are first manufactured from a spherical matrix, formed by any element, material or substance, which is covered with another material, so that a sphere is obtained whose walls are of a material other than the one inside, preferably the inner material being a material or substance of lower density than the outer material. This coating can be carried out, for example, by incorporating the matrix spheres into a rotating bowl or drum in which a polymer additive is incorporated to form a sticky substance to which the outer material adheres.
Una vez obtenidas las micro esferas, y en función del tipo de material interior utilizado, se puede extinguir tanto el aditivo polímero como dicho material interior mediante su incorporación en un horno, obteniéndose así micro esferas huecas. Once the micro spheres are obtained, and depending on the type of interior material used, both the polymer additive and said interior material can be extinguished by incorporation into an oven, thus obtaining hollow micro spheres.
Dichas micro esferas, tanto si son huecas como si no, se podrán incorporar al material que se pretende aligerar durante su proceso de fabricación normal. Lógicamente, el grado de aligeramiento y resistencia de dicho material irá en función del tamaño y número de micro esferas que incorpore, pero siempre será más resistente que otro material del mismo tipo obtenido mediante el sistema convencional de incorporación de aire, ya que, a diferencia de estos, el material obtenido mediante el descrito procedimiento contendrá microesferas que podrán tener la resistencia que se desee en cada caso, y por tanto, mucho mayor. Además, dependiendo de su consistencia, este material aligerado, si se vierte en un molde, permite obtener piezas con sus caras lisas y homogéneas, sin que se aprecien los múltiples huecos de su masa interior . Said micro spheres, whether they are hollow or not, may be incorporated into the material that is intended to be lightened during its normal manufacturing process. Logically, the degree of lightening and resistance of said material will depend on the size and number of micro spheres that it incorporates, but it will always be more resistant than other material of the same type obtained through the conventional air incorporation system, since, unlike of these, The material obtained by means of the described procedure will contain microspheres that may have the desired resistance in each case, and therefore, much greater. In addition, depending on its consistency, this lightened material, if poured into a mold, allows to obtain pieces with their smooth and homogeneous faces, without appreciating the multiple gaps of their inner mass.
El descrito proceso para la fabricación de materiales aligerados resistentes representa, pues, una estructura innovadora de características estructurales y constitutivas desconocidas hasta ahora para tal fin, razones que unidas a su utilidad práctica, la dotan de fundamento suficiente para obtener el privilegio de exclusividad que se solicita. The described process for the manufacture of lightened resistant materials thus represents an innovative structure with structural and constitutive characteristics unknown until now for this purpose, reasons that, together with its practical utility, provide it with sufficient grounds to obtain the privilege of exclusivity that is request.
DESCRIPCIÓN DE LOS DIBUJOS DESCRIPTION OF THE DRAWINGS
Para complementar la descripción que se está realizando y con objeto de ayudar a una mejor comprensión de las características de la invención, se acompaña a la presente memoria descriptiva, como parte integrante de la misma, de un juego de planos, en los que con carácter ilustrativo y no limitativo se ha representado lo siguiente: Las figuras número 1 y 2.- Muestran sendas vistas en sección de las micro esferas que se incorporan en el material para su aligeramiento, según el proceso objeto de la invención, en sus fases de fabricación y eliminación de su contenido interno, respectivamente. La figura número 3.- Muestra una vista esquematizada y en sección de un ejemplo de material aligerado resistente, ya terminado según el proceso de la invención. To complement the description that is being made and in order to help a better understanding of the characteristics of the invention, this descriptive report is attached, as an integral part thereof, of a set of drawings, in which with character Illustrative and non-limiting, the following has been represented: Figures 1 and 2 show two sectional views of the microspheres that are incorporated in the material for lightening, according to the process object of the invention, in its manufacturing phases and elimination of its internal content, respectively. Figure number 3.- Shows a schematic and sectional view of an example of lightened resistant material, already finished according to the process of the invention.
REALIZACIÓN PREFERENTE DE LA INVENCIÓN PREFERRED EMBODIMENT OF THE INVENTION
A la vista de las mencionadas figuras, y de acuerdo con la numeración adoptada, se puede observar como el proceso para la fabricación de materiales aligerados resistentes que la invención propone comprende en las siguientes fases: En primer lugar, se fabrican unas microesferas (1), las cuales pueden ser huecas o contener cualquier sustancia o material. In view of the aforementioned figures, and in accordance with the numbering adopted, it can be seen how the process for the manufacture of lightened resistant materials that the invention proposes comprises in the following phases: First, microspheres are manufactured (1) , which may be hollow or contain any substance or material.
Para ello, se parte de una matriz esférica (2), formada por cualquier elemento, material o sustancia, por ejemplo poliestireno expandido, el cual se cubre con un material externo (3) distinto, por ejemplo cemento, de forma que se obtiene una esfera cuyas paredes son de un material distinto al que contiene en su interior (figura 1) . For this, it is based on a spherical matrix (2), formed by any element, material or substance, for example expanded polystyrene, which is covered with a different external material (3), for example cement, so that a sphere whose walls are of a different material than the one inside (figure 1).
Para conseguir dicho recubrimiento, se utiliza, una cuba o bombo giratorio en el que se incorpora un aditivo polímero para que forme una sustancia pegajosa (4) sobre las bolas de poliestireno, que constituyen la antedicha matriz (2) de las microesferas. Después se añade el material externo (3), en este caso cemento en polvo de forma que este se va adhiriendo a dichas bolas y las recubre en su totalidad para formar el material externo (3) de las microesferas . El resultado obtenido son unas microesferas (1) formadas por un material interior que es la matriz esférica (2) y por un material exterior (3) distinto. Dichas microesferas (1), si el material lo permite, tal como en el ejemplo citado, se introducen en un horno hasta extinguir el polímero y el poliestireno de su interior, es decir, la matriz esférica (2) interior, obteniéndose una microesfera (1) hueca (figura 2) . To achieve said coating, a rotating bowl or drum is used in which a polymer additive is incorporated to form a sticky substance (4) on the polystyrene balls, which constitute the said matrix (2) of the microspheres. Then the external material (3) is added, in this case cement powder so that it adheres to said balls and completely covers them to form the external material (3) of the microspheres. The result obtained are microspheres (1) formed by an inner material that is the spherical matrix (2) and by a different outer material (3). Said microspheres (1), if the material permits, as in the aforementioned example, are introduced into an oven until the polymer and the polystyrene of its interior are extinguished, that is, the internal spherical matrix (2), obtaining a microsphere ( 1) hollow (figure 2).
Finalmente, dichas microesferas (1), tanto si son huecas como si no y que pueden tener la resistencia que se desee, se incorporan al material (5) que se pretende aligerar durante su proceso de fabricación normal . Finally, said microspheres (1), whether they are hollow or not and that may have the desired resistance, are incorporated into the material (5) that is intended to be lightened during its normal manufacturing process.
Así, por ejemplo, las citadas microesferas de cemento, si se incorporan como árido a una masa con agua y cemento, permiten obtener un hormigón muy resistente y aligerado, pero hecho solamente de cemento . Thus, for example, the mentioned cement microspheres, if they are incorporated as aggregate into a mass with water and cement, allow to obtain a very resistant and lightened concrete, but made only of cement.
Además, dependiendo de su consistencia, si se vierte en un molde el material aligerado (5) , se pueden obtener piezas con caras (6) lisas y homogéneas, sin que se aprecien los múltiples huecos formados por las microesferas (1) contenidas en su masa interior (figura 3) . In addition, depending on its consistency, if the lightened material (5) is poured into a mold, pieces with smooth and homogeneous faces (6) can be obtained, without appreciating the multiple gaps formed by the microspheres (1) contained in its inner mass (figure 3).
Descrita suficientemente la naturaleza de la presente invención, así como la manera de ponerla en práctica, no se considera necesario hacer más extensa su explicación para que cualquier experto en la materia comprenda su alcance y las ventajas que de ella se derivan, haciendo constar que, dentro de su esencialidad, podrá ser llevada a la práctica en otras formas de realización que difieran en detalle de la indicada a titulo de ejemplo, y a las cuales alcanzará igualmente la protección que se recaba siempre que no se altere, cambie o modifique su principio fundamental. Describing sufficiently the nature of the present invention, as well as the way of putting it into practice, it is not considered necessary to extend its explanation so that any expert in the field understands its scope and the advantages that derive from it, stating that, inside of Essentially, it may be carried out in other embodiments that differ in detail from that indicated by way of example, and to which it will also achieve the protection that is sought as long as it does not alter, change or modify its fundamental principle.

Claims

R E I V I N D I C A C I O N E S
1. - PROCESO PARA LA FABRICACIÓN DE MATERIALES ALIGERADOS RESISTENTES, caracterizado por el hecho de comprender las siguientes fases: 1. - PROCESS FOR THE MANUFACTURE OF RESISTANT LIGHTED MATERIALS, characterized by understanding the following phases:
- En primer lugar, se fabrican unas microesferas (1), que pueden ser huecas o contener cualquier sustancia o material, y cuyas paredes son de un material distinto al que contiene en su interior. - In the first place, microspheres (1) are manufactured, which can be hollow or contain any substance or material, and whose walls are made of a different material than the one inside.
- Dichas microesferas (1) se incorporan al material (5) que se pretende aligerar durante su proceso de fabricación normal. - Said microspheres (1) are incorporated into the material (5) that is intended to lighten during its normal manufacturing process.
2. - PROCESO PARA LA FABRICACIÓN DE MATERIALES ALIGERADOS RESISTENTES, según la reivindicación, caracterizado por el hecho de que para la fabricación de las microesferas (1) se parte de una matriz esférica (2), formada por cualquier elemento, material o sustancia, por ejemplo poliestireno expandido, el cual se cubre con un material externo (3) distinto, por ejemplo cemento, de forma que se obtiene una esfera cuyas paredes son de un material distinto al que contiene en su interior. 2. - PROCESS FOR THE MANUFACTURE OF RESISTANT LIGHTED MATERIALS, according to the claim, characterized by the fact that for the manufacture of the microspheres (1) it is part of a spherical matrix (2), formed by any element, material or substance, for example expanded polystyrene, which is covered with a different external material (3), for example cement, so that a sphere is obtained whose walls are of a different material than the one contained inside.
3. - PROCESO PARA LA FABRICACIÓN DE MATERIALES ALIGERADOS RESISTENTES, según las reivindicaciones 1 y 2, caracterizado por el hecho de que para conseguir el recubrimiento de la matriz esférica (2), se utiliza una cuba o bombo giratorio en el que se incorpora un aditivo, por ejemplo un polímero para que forme una sustancia pegajosa (4) sobre la matriz esférica (2) de las microesferas. Después se añade el material externo (3) en polvo de forma que este se va adhiriendo a dicha matriz y las recubre en su totalidad. 3. - PROCESS FOR THE MANUFACTURE OF RESISTANT LIGHTED MATERIALS, according to claims 1 and 2, characterized in that to achieve the coating of the spherical matrix (2), a rotating bowl or drum is used in which a additive, for example a polymer to form a sticky substance (4) on the spherical matrix (2) of the microspheres. Then the external material (3) is added in powder form so that it adheres to said matrix and completely covers them.
4.- PROCESO PARA LA FABRICACIÓN DE MATERIALES ALIGERADOS RESISTENTES, según las reivindicaciones 1 a 3, caracterizado por el hecho de que, si el material lo permite, las microesferas (1) se introducen en un horno hasta extinguir la matriz esférica (2) de su interior, obteniéndose una microesfera (1) hueca. 4. PROCESS FOR THE MANUFACTURE OF RESISTANT LIGHTED MATERIALS, according to claims 1 to 3, characterized in that, if the material permits, the microspheres (1) are introduced into an oven until the spherical matrix is extinguished (2) inside, obtaining a hollow microsphere (1).
5.- PROCESO PARA LA FABRICACIÓN DE MATERIALES ALIGERADOS RESISTENTES, según la reivindicación 1, caracterizado por el hecho de que, dependiendo de su consistencia, si se vierte en un molde el material aligerado (5), se obtienen piezas con caras (6) lisas y homogéneas, sin que se aprecien los múltiples huecos formados por las microesferas (1) contenidas en su masa interior. 5. PROCESS FOR THE MANUFACTURE OF RESISTANT LIGHTED MATERIALS, according to claim 1, characterized in that, depending on its consistency, if the lightened material (5) is poured into a mold, parts with faces (6) are obtained smooth and homogeneous, without appreciating the multiple holes formed by the microspheres (1) contained in its inner mass.
PCT/ES2010/070589 2009-09-11 2010-09-09 Method for producing strong, lightweight materials WO2011029979A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ESP200930677 2009-09-11
ES200930677A ES2361870B1 (en) 2009-09-11 2009-09-11 PROCESS FOR THE MANUFACTURE OF RESISTANT LIGHTED MATERIALS

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WO2011029979A3 WO2011029979A3 (en) 2011-07-14

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3902911A (en) * 1972-05-01 1975-09-02 Mobil Oil Corp Lightweight cement
US20020004111A1 (en) * 2000-05-31 2002-01-10 Asahi Glass Company, Limited Hollow glass microspheres and process for their production
US20070056476A1 (en) * 2005-09-09 2007-03-15 Halliburton Energy Services, Inc. Lightweight settable compositions comprising cement kiln dust

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3902911A (en) * 1972-05-01 1975-09-02 Mobil Oil Corp Lightweight cement
US20020004111A1 (en) * 2000-05-31 2002-01-10 Asahi Glass Company, Limited Hollow glass microspheres and process for their production
US20070056476A1 (en) * 2005-09-09 2007-03-15 Halliburton Energy Services, Inc. Lightweight settable compositions comprising cement kiln dust

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ES2361870A1 (en) 2011-06-24
WO2011029979A3 (en) 2011-07-14
ES2361870B1 (en) 2012-05-25

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