FR2525586A1 - Thermally:insulating lightweight concrete - contains not only expanded polymer beads, but also expanded clay or glass beads improving strength and mouldability of concrete - Google Patents
Thermally:insulating lightweight concrete - contains not only expanded polymer beads, but also expanded clay or glass beads improving strength and mouldability of concrete Download PDFInfo
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- FR2525586A1 FR2525586A1 FR8206957A FR8206957A FR2525586A1 FR 2525586 A1 FR2525586 A1 FR 2525586A1 FR 8206957 A FR8206957 A FR 8206957A FR 8206957 A FR8206957 A FR 8206957A FR 2525586 A1 FR2525586 A1 FR 2525586A1
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- concrete
- expanded
- beads
- balls
- lightweight concrete
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Porous Artificial Stone Or Porous Ceramic Products (AREA)
Abstract
Description
La présente invention concerne un béton allégé présentant de bonnes propriétés d'isolation thermique. The present invention relates to a lightweight concrete having good thermal insulation properties.
On connaît déjà différents types de béton allégé, notamment du béton renfermant des billes de polystyrène expansé. Ce béton allégé présente évidemment une densité inférieure à celles des bétons usuels, d'autant plus faible que la proportion de polystyrène expansé qu'il contient est plus importante ; un tel matériau permet donc de fabriquer par exemple des parpaings ou des entrevous qui, à dimensions égales, sont plus faciles à manipuler que des parpaings ou des entrevous en béton 'usuel, Mais surtout, le béton allégé de ce type offre l'important avantage de présenter de bonnes propriétés d'isolation thermique, qui peuvent être mises avantageusement à profit pour l'isolation des bâtiments. On a cependant constaté que ce type de béton allégé était d'un emploi assez malaisé, notamment dans les machines de moulage.D'autre -part, dans le cas notamment où il contient une forte proportion de polystyrène expansé, ce béton allégé présente des propriété mécaniques sensiblement inférieures à celles des bétons usuels. Various types of lightweight concrete are already known, in particular concrete containing expanded polystyrene beads. This lightened concrete obviously has a lower density than that of conventional concrete, the lower the proportion of expanded polystyrene it contains; such a material therefore makes it possible to manufacture, for example, breeze blocks or interjoists which, with equal dimensions, are easier to handle than breeze blocks or interjoists of ordinary concrete, but above all, light concrete of this type offers the important advantage. to present good thermal insulation properties, which can be advantageously used for the insulation of buildings. However, it has been found that this type of light concrete was difficult to use, especially in molding machines. On the other hand, especially if it contains a high proportion of expanded polystyrene, this light concrete has mechanical properties significantly lower than those of conventional concrete.
Le béton allégé selon la présente invention présente tous les avantages du béton renfermant des billes de polystyrène expansé, tout en atténuant sensiblement ses inconvénients, précédémment mentionnés. The lightened concrete according to the present invention has all the advantages of concrete containing expanded polystyrene beads, while substantially reducing its drawbacks, previously mentioned.
Le béton allégé selon la présente invention est caractérisé en ce qu'il renferme des corps expansés, notamment en forme de billes, constitués, pour les plus petits, par du polystyrène expansé, et, pour les plus gros, par une matière minérale expansée, par exemple du verre expansé ou de l'argile expansée. The lightened concrete according to the present invention is characterized in that it contains expanded bodies, in particular in the form of beads, constituted, for the smallest, by expanded polystyrene, and, for the largest, by an expanded mineral material, for example expanded glass or expanded clay.
Dans la mesure où il contient une proportion non négligeable de polystyrène expansé, le béton allégé selon la présente invention offre aussi de bonnes propriétés d'isolation thermique et une densité sensiblement inférieure à celles des bétons usuels, ce qui facilite la manipulons tion des produits fabriqués avec ce béton, et en permet avantageusement l'emploi pour l'isolation thermique des batimentsO rar ailleurs, lors du remplissage d'un moule avec le béton selon la présente invention, les corps de matière minérale expansée, notamment les billes de verre expansé, dont, suivant les cas, le diamètre peut atteinre et même dépasser le centimètre, ont un effet d'entrafnement, par gravité, pour les autres.ónstituants du mélange, dont la granulométrie, sinon la densité, est notablement inSY- rieure. On a constaté effectivement que la présence de billes de verre expansé facilite et accélère le remplissage des moules, et permet par suite d'accélérer la cadence de fabrication d'une machine à mouler ; les mimes avantages sont évidemment obtenus dans le cas du remplissage d'un coffrage.En outre, les corps en matière minérale expansée, notamment les billes de verre expansé, dans la mesure où ils présentent des dimensions notablement supérieures à celles des corps, notamment des billes, de polystyrène expansé, forment une sorte de matrice plus résistante à l'intérieur du béton selon la présente invention, ce qui améliore sensiblement ses propriétés mécaniques par rapport à celles du béton renfermant seulement du polystyrène expansé. On comprend en effet que, lorsqutun bloc de béton selon la présente invention est soumis à des contraintes de compression, celles-ci sont encaissées essentiellement par les billes de verre expansé et les matériaux minéraux qui les enrobent, ce qui évite notamment l'écrasement du polystyrène expansé par les forces de pression.On comprend qu'il nten serait pas de meme si les corps de polystyrène expansé étaient plus gros que les corps de matière minérale expansée, et que, dans ce dernier cas, au début de l'application de contraintes de compression, la résistance du béton suivant l'invention ne serait guère supérieure à celle du béton
contenant exclusivement du polystyrène, une meilleure résistance nlétant obtenue qu'après réduction, par écrasement, des dimensions des corps de polystyrène expansé, sensiblement jusqu.'aux dimensions des corps de matière minérale expansée, plus résistants.Insofar as it contains a non-negligible proportion of expanded polystyrene, the lightened concrete according to the present invention also offers good thermal insulation properties and a density substantially lower than that of conventional concretes, which facilitates the handling of the products produced. with this concrete, and advantageously allows the use thereof for the thermal insulation of buildings O rar elsewhere, when filling a mold with the concrete according to the present invention, the bodies of expanded mineral material, in particular beads of expanded glass, which, depending on the case, the diameter can reach and even exceed one centimeter, have an entanglement effect, by gravity, for the other constituents of the mixture, whose particle size, if not density, is notably lower. It has actually been observed that the presence of expanded glass beads facilitates and accelerates the filling of the molds, and consequently makes it possible to accelerate the rate of manufacture of a molding machine; the same advantages are obviously obtained in the case of filling a formwork. In addition, the bodies of expanded mineral material, in particular the beads of expanded glass, insofar as they have dimensions considerably greater than those of the bodies, in particular balls, of expanded polystyrene, form a kind of more resistant matrix inside the concrete according to the present invention, which appreciably improves its mechanical properties compared to those of concrete containing only expanded polystyrene. It is in fact understood that, when a concrete block according to the present invention is subjected to compression stresses, these are essentially collected by the expanded glass balls and the mineral materials which coat them, which in particular prevents the crushing of the polystyrene expanded by pressure forces. We understand that it would not be the same if the bodies of expanded polystyrene were larger than the bodies of expanded mineral matter, and that, in the latter case, at the start of the application of compressive stresses, the strength of the concrete according to the invention would hardly be greater than that of concrete
containing exclusively polystyrene, better resistance obtained than after reduction, by crushing, of the dimensions of the expanded polystyrene bodies, substantially up to the dimensions of the bodies of expanded mineral material, which are more resistant.
L'étudie de la structure du béton selon la présente invention a montré, d'autre part, que les petites billes de polystyrène expansé viennent s'agglomérer pour la plupart autour des grosses billes de matière minérale expansée, l'ensemble formant une sorte d'agrégat, qui assure une bonne cohésion du béton selon la présente invention. The study of the structure of the concrete according to the present invention has shown, on the other hand, that the small balls of expanded polystyrene come to agglomerate for the most part around the large balls of expanded mineral material, the whole forming a sort of 'aggregate, which ensures good cohesion of the concrete according to the present invention.
Dans une forme de réalisation préférée du béton selon la présente invention, les plus grosses billes ont un diamètre calibré, compris entre 8 et 25 mm. environ, et une masse volumique de par exemple 140 kg/m3, tandis que les plus petites billes ont un diamètre calibré inférieur à 2 mm. environ et une masse volumique par exemple de 3'ordre de 10 à 20 kg/m3. Ces valeurs ne sont cependant pas impératives ; par exemple, le diamètre des plus grosses billes doit autre toujours choisi en fonction de l'épaisseur de l'objet en béton à réaliser, par exemple une paroi, de manière que le diamètre calibré desdites grosses billes soit très inférieur à l'épaisseur minimale de 11 objet en béton. In a preferred embodiment of the concrete according to the present invention, the largest balls have a calibrated diameter, between 8 and 25 mm. approximately, and a density of for example 140 kg / m3, while the smallest balls have a calibrated diameter less than 2 mm. approximately and a density for example of the order of 10 to 20 kg / m3. These values are not, however, imperative; for example, the diameter of the largest balls must always be chosen according to the thickness of the concrete object to be produced, for example a wall, so that the calibrated diameter of said large balls is much less than the minimum thickness. of 11 concrete object.
D'autre part, les proportions de polystyrène expansé et de matière minérale expansée dans le béton selon la présente invention sont matières à option ; elles doivent être choisies évidemment en fonction des caractéristiques, notamment dé densité, d'isolation thermique, de résistance mécanique00 etc, que le béton doit présenter pour les applications auxquelles il est destiné. De même, la nature et les proportions des autres constituants du béton selon la présente invention sont matières à option, la présente invention pouvant etre appliquée pratiquement avec toutes les compositions connues de béton. On the other hand, the proportions of expanded polystyrene and of expanded mineral material in concrete according to the present invention are optional materials; they must obviously be chosen as a function of the characteristics, in particular density, thermal insulation, mechanical resistance, etc., that the concrete must have for the applications for which it is intended. Likewise, the nature and the proportions of the other constituents of the concrete according to the present invention are optional materials, the present invention being able to be applied practically with all known compositions of concrete.
A titre d'exemple, on a décrit ci-dessous un mode d'exécution de l'invention. By way of example, an embodiment of the invention has been described below.
Dans le mélangeur à trains valseurs d'une presse à blocs, on introduit les constituants suivants, pour 1m3 de béton billes de polystyrène expansé : 900 à 500 litres, billes de verre expansé : 200 à 1000 litres, ciment CÂ ou CPJ : 150 à 400 kg, chaux : 15 à 40 kg, eau : 65 à 240 litres, adjuvant : 1 à 7 kg. The following components are introduced into the valving train mixer of a block press, for 1m3 of concrete expanded polystyrene beads: 900 to 500 liters, expanded glass beads: 200 to 1000 liters, CÂ or CPJ cement: 150 to 400 kg, lime: 15 to 40 kg, water: 65 to 240 liters, adjuvant: 1 to 7 kg.
L'adjuvant peut être constitué de la façon suivante :
collolde : 20 à 45 % en poids,
tensio-actif : 20 à 45 % " 11
charge inerte : 10 à 60 % " n
On laisse le mélange se faire pendant 3 à 4 minutes 3 en cas de besoin, on ajuste la quantité d'eau,afin d'obtenir.The adjuvant can be made up as follows:
collold: 20 to 45% by weight,
surfactant: 20 to 45% "11
inert load: 10 to 60% "n
The mixture is allowed to take place for 3 to 4 minutes 3 if necessary, the amount of water is adjusted in order to obtain.
un mélange ayant la plasticité voulue, puis on vidange la trémie d'alimentation. a mixture having the desired plasticity, then the feed hopper is emptied.
Le remplissage du moule s'effectue de façon traditionnelle, avec vibrations et va et vient du tiroir d1alimen- tation à une cadence d'environ deux planches par minute. The mold is filled in the traditional way, with vibrations and back and forth from the feed drawer at a rate of about two boards per minute.
.La figure unique du dessin annexé représente une coupe d'un morceau de béton allégé selon la présente invention. .The single figure of the accompanying drawing shows a section of a piece of lightened concrete according to the present invention.
Claims (5)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8206957A FR2525586B1 (en) | 1982-04-22 | 1982-04-22 | LIGHTWEIGHT CONCRETE |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8206957A FR2525586B1 (en) | 1982-04-22 | 1982-04-22 | LIGHTWEIGHT CONCRETE |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2525586A1 true FR2525586A1 (en) | 1983-10-28 |
FR2525586B1 FR2525586B1 (en) | 1986-06-27 |
Family
ID=9273272
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR8206957A Expired FR2525586B1 (en) | 1982-04-22 | 1982-04-22 | LIGHTWEIGHT CONCRETE |
Country Status (1)
Country | Link |
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FR (1) | FR2525586B1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1026132A1 (en) * | 1999-02-03 | 2000-08-09 | Dieter Lind | Sound-proof, anti-slip heat insulation flooring |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1195738A (en) * | 1957-05-15 | 1959-11-19 | Improvements to lightweight construction materials | |
DE2351469A1 (en) * | 1973-10-13 | 1975-04-17 | Dyckerhoff & Widmann Ag | Light concrete contg. foamed polystyrene pellets - pref. added to light aggregates before making-up water and cement |
FR2329608A1 (en) * | 1975-10-27 | 1977-05-27 | Finucci Mansueto | Insulating compsn. for use in building - comprising expanded glass beads, straw, synthetic foam chips, mineral binder, resin and adhesive |
FR2454491A1 (en) * | 1979-04-18 | 1980-11-14 | Saunier Jean Pierre | Boards of glass and expanded polystyrene beads - consolidated by heat and phenolic resin to produce fire resistant structural insulation panels |
-
1982
- 1982-04-22 FR FR8206957A patent/FR2525586B1/en not_active Expired
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1195738A (en) * | 1957-05-15 | 1959-11-19 | Improvements to lightweight construction materials | |
DE2351469A1 (en) * | 1973-10-13 | 1975-04-17 | Dyckerhoff & Widmann Ag | Light concrete contg. foamed polystyrene pellets - pref. added to light aggregates before making-up water and cement |
FR2329608A1 (en) * | 1975-10-27 | 1977-05-27 | Finucci Mansueto | Insulating compsn. for use in building - comprising expanded glass beads, straw, synthetic foam chips, mineral binder, resin and adhesive |
FR2454491A1 (en) * | 1979-04-18 | 1980-11-14 | Saunier Jean Pierre | Boards of glass and expanded polystyrene beads - consolidated by heat and phenolic resin to produce fire resistant structural insulation panels |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1026132A1 (en) * | 1999-02-03 | 2000-08-09 | Dieter Lind | Sound-proof, anti-slip heat insulation flooring |
Also Published As
Publication number | Publication date |
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FR2525586B1 (en) | 1986-06-27 |
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