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WO1988005765A1 - Procede de production de beton leger - Google Patents

Procede de production de beton leger Download PDF

Info

Publication number
WO1988005765A1
WO1988005765A1 PCT/AT1988/000003 AT8800003W WO8805765A1 WO 1988005765 A1 WO1988005765 A1 WO 1988005765A1 AT 8800003 W AT8800003 W AT 8800003W WO 8805765 A1 WO8805765 A1 WO 8805765A1
Authority
WO
WIPO (PCT)
Prior art keywords
plastic
cement
particles
rock powder
concrete
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/AT1988/000003
Other languages
German (de)
English (en)
Inventor
Markus Stracke
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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
Publication date
Priority claimed from AT17087A external-priority patent/AT394185B/de
Priority claimed from AT36887A external-priority patent/AT394548B/de
Application filed by Individual filed Critical Individual
Publication of WO1988005765A1 publication Critical patent/WO1988005765A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B20/00—Use 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
    • C04B20/10—Coating or impregnating
    • C04B20/12—Multiple coating or impregnating

Definitions

  • the invention relates to a process for the production of lightweight concrete which contains granulated plastic as an additive, preferably polystyrene beads, which are introduced into a mixture of cement and water.
  • Lightweight concretes which consist essentially of polystyrene foam particles, cement, water and plasticizers, or are produced.
  • the difficulty in the production and processing of such concretes is that it is not possible to mix the foam particles with water and cement in an open free-fall mixer or forced mixer, as is possible in the production of heavy concrete, in the case of lightweight concrete.
  • these are those with a density in the range of 0.2 to 0.5 kg / dm 3 , the individual grain is not coated with the binder sufficiently uniformly, or they float at all and therefore no homogeneous lightweight concrete mixture can be achieved.
  • the aim of the invention is to avoid these disadvantages and to propose a method of the type mentioned at the outset which enables the production of largely homogeneous lightweight concrete mixtures in a simple manner.
  • the plastic granulate which preferably consists of polystyrene foam and has a grain size of 3 to 15 mm, can be used. Pre-invented by the Measures are achieved that the granules are made heavy enough before the concrete mix is actually prepared in order to safely avoid floating of the individual particles. This also enables the concrete mix to be produced in a free-fall mixer. In addition, the rock powder adhering to the individual plastic particles also leads to an improvement in the adhesion of the cement paste when preparing the concrete mixture.
  • the mixing of the plastic part with the cement paste is advantageously carried out in a compulsory mixer, thereby ensuring a very uniform coating of the plastic particles.
  • the mixing water content should be kept as low as possible so that only the lowest possible residual moisture is retained.
  • the rock powder added to the mixture consisting of cement paste and plastic granulate extracts water from this mixture, the total amount of mixing water being almost entirely chemically bound by the cement.
  • the rock powder used as a separating agent prevents e.g. Dolomite sand with the specified grain size, a caking of the plastic particles.
  • the plastic granulate is subjected to a heat treatment prior to mixing with the cement paste, which causes the surface of the particles to melt.
  • thermoplastic plastic particles encased with it are removed by a heat treatment in which the plastic particles melt.
  • polystyrene foam particles are used and that they are exposed to a temperature of more than 120 ° C., preferably one of approximately 240 ° C., during the heat treatment.
  • the extent of the reduction and compression of the plastic particles can also be controlled by selecting the appropriate temperature and duration of treatment. It is also possible to reduce the size of the individual plastic particles, especially if it is polystyrene foam, by up to 40%.
  • Plastic can also be used to produce such an additive, in particular polystyrene foam waste, such as is produced in packaging become. This enables simple and environmentally friendly recycling of waste material to a not inconsiderable extent.
  • the aggregate produced in this way could be conveyed in a pipeline by means of a blower, which is a significant advantage in use compared to the previous lightweight concrete, which can only be conveyed in containers or by means of screw conveyors or scraper conveyors.
  • Test pieces produced from this mixture had a bulk density of approx. 0.25 kg / dm 3 and a coefficient of thermal conductivity of 0.054 W / m ° K.
  • test specimen obtained in this example had a bulk density of 0.35 kg / dm 3 and a coefficient of thermal conductivity of 0.083 Wm ° K.
  • the cube compressive strength of this test specimen was 1/3 greater than that of the test specimen obtained according to Example 1.
  • the good thermal insulation properties of the lightweight concretes produced by the process according to the invention make them particularly suitable for the production of thermal insulation layers. At the same time, the waste problem is also relieved, since old material can be used for such concretes.
  • a lightweight concrete produced by the method according to the invention for the production of ceiling heat insulated stanchions, where loosened material is poured on and then removed.
  • Fig. 1 shows schematically a coated with rock flour
  • FIG. 2 schematically shows the plastic particle of Fig. 1 after heat treatment
  • Fig. 3 shows the bond of the particles in the finished lightweight concrete.
  • a comparison of the particles according to FIGS. 1 and 2 shows that the polysytrol foam particle 1, which is coated with a layer of rock powder particles 2, or is surrounded by it, after a heat treatment due to the melting of the particles which occurs, results in a much denser packing of the rock powder particles has its surface.
  • each individual coated particle 1 surrounds a thin layer of cement paste 3 that holds these particles together, pores 4 remain between the individual particles, as is customary in lightweight concrete.
  • the strength of the finished lightweight concrete can be adjusted within wide limits, as can the pre-mixing with the cement paste and / or after Coating the plastic particles with the rock flour heat treatment.

Landscapes

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

Abstract

Un procédé permet de produire du béton léger contenant un aggrégat formé de matière plastique granulée, de préférence des globules de polystyrol, ajoutée à un mélange de ciment et d'eau. Pour que ce béton puisse être préparé dans des malaxeurs simples à gravité, la matière plastique granulée est mélangée à une petite quantité de pâte de ciment, puis de la poudre de roches ayant des particules d'une grosseur comprise entre 0,02 et 2 mm, de préférence entre 0,02 et 0,4 mm, est ajoutée à ce mélange. Le dosage de la pâte de ciment et de la poudre de roches est tel que cette dernière sépare les particules de matière plastique enrobées de poudre de roches. On mélange de la façon usuelle l'aggrégat ainsi obtenu avec du ciment et de l'eau, si nécessaire après une étape intermédiaire de stockage, afin de produire du béton.
PCT/AT1988/000003 1987-01-28 1988-01-28 Procede de production de beton leger Ceased WO1988005765A1 (fr)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
ATA170/87 1987-01-28
AT17087A AT394185B (de) 1987-01-28 1987-01-28 Verwendung eines polystyrolschaumstoffleichtbetons
ATA313/87 1987-02-13
AT31387 1987-02-13
AT36887A AT394548B (de) 1987-02-19 1987-02-19 Verfahren zur herstellung von zuschlagstoffen aus schaumstoffteilchen fuer die herstellung von leichtbeton
ATA368/87 1987-02-19

Publications (1)

Publication Number Publication Date
WO1988005765A1 true WO1988005765A1 (fr) 1988-08-11

Family

ID=27145931

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AT1988/000003 Ceased WO1988005765A1 (fr) 1987-01-28 1988-01-28 Procede de production de beton leger

Country Status (1)

Country Link
WO (1) WO1988005765A1 (fr)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992010534A1 (fr) * 1989-11-23 1992-06-25 Markus Stracke Procede et dispositif pour l'obtention et le traitement de charges
WO1993001142A3 (fr) * 1991-07-03 1993-07-08 Markus Stracke Procede de fabrication d'agregats legers de beton
WO1994011586A1 (fr) * 1992-11-09 1994-05-26 Markus Stracke Panneaux calorifuges pour façades
AT853U1 (de) * 1993-03-15 1996-06-25 Stracke Wolfgang Mag Verfahren zur bildung von fertigputzen
AT1458U1 (de) * 1996-06-26 1997-05-26 Prottelith Baustoffe Brandenbu Fussbodenkonstruktion
EP0816566A3 (fr) * 1996-06-26 1998-05-20 Prottelith Baustoffe Brandenburg GmbH Construction de plancher
RU2132316C1 (ru) * 1998-10-13 1999-06-27 Удачкин Игорь Борисович Способ приготовления бетонной смеси
WO2000035825A3 (fr) * 1998-12-11 2000-11-16 Fraunhofer Ges Forschung Procede de fabrication de beton leger, granulats pour ce beton et dispositif de criblage de la matiere granulee
WO2001031132A1 (fr) * 1999-10-27 2001-05-03 Walter Krassnitzer Materiau de construction et d'isolation
EP1457615A1 (fr) * 2003-03-10 2004-09-15 Kastell GmbH Elément de paroi avec des sphères de matière polystyrène
CN112723912A (zh) * 2021-02-06 2021-04-30 呼伦贝尔学院 用于高寒地区免烧火越冬大棚的装配式墙体

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1823343A (en) * 1930-02-26 1931-09-15 Aerocrete Corp Of America Method of producing porous concrete
FR1457584A (fr) * 1964-09-28 1966-01-24 Synfibrit Gmbh Agrégat léger pour masses telles que le béton
DE2001696A1 (de) * 1970-01-15 1971-07-22 Suedbau Sueddeutsche Bautechni Verfahren fuer die Herstellung eines lagerfaehigen,leichten Zuschlagstoffes fuer Leichtbeton
FR2324589A1 (fr) * 1975-09-18 1977-04-15 Francois Leca Procede d'enrobage de billes isolantes et realisation du procede
GB1535132A (en) * 1977-02-07 1978-12-06 Asano Pole Kk Porous inorganic member and method of producing same
DE3000047A1 (de) * 1980-01-03 1981-07-09 Horst Dieter 4100 Duisburg Fischer Granulat zum abdecken einer schmelzoberflaeche

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1823343A (en) * 1930-02-26 1931-09-15 Aerocrete Corp Of America Method of producing porous concrete
FR1457584A (fr) * 1964-09-28 1966-01-24 Synfibrit Gmbh Agrégat léger pour masses telles que le béton
DE2001696A1 (de) * 1970-01-15 1971-07-22 Suedbau Sueddeutsche Bautechni Verfahren fuer die Herstellung eines lagerfaehigen,leichten Zuschlagstoffes fuer Leichtbeton
FR2324589A1 (fr) * 1975-09-18 1977-04-15 Francois Leca Procede d'enrobage de billes isolantes et realisation du procede
GB1535132A (en) * 1977-02-07 1978-12-06 Asano Pole Kk Porous inorganic member and method of producing same
DE3000047A1 (de) * 1980-01-03 1981-07-09 Horst Dieter 4100 Duisburg Fischer Granulat zum abdecken einer schmelzoberflaeche

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992010534A1 (fr) * 1989-11-23 1992-06-25 Markus Stracke Procede et dispositif pour l'obtention et le traitement de charges
AT401774B (de) * 1989-11-23 1996-11-25 Markus Ing Stracke Verfahren zur herstellung von zuschlagstoffen für leichtbetone
WO1993001142A3 (fr) * 1991-07-03 1993-07-08 Markus Stracke Procede de fabrication d'agregats legers de beton
WO1994011586A1 (fr) * 1992-11-09 1994-05-26 Markus Stracke Panneaux calorifuges pour façades
AT853U1 (de) * 1993-03-15 1996-06-25 Stracke Wolfgang Mag Verfahren zur bildung von fertigputzen
AT1458U1 (de) * 1996-06-26 1997-05-26 Prottelith Baustoffe Brandenbu Fussbodenkonstruktion
EP0816566A3 (fr) * 1996-06-26 1998-05-20 Prottelith Baustoffe Brandenburg GmbH Construction de plancher
RU2132316C1 (ru) * 1998-10-13 1999-06-27 Удачкин Игорь Борисович Способ приготовления бетонной смеси
WO2000035825A3 (fr) * 1998-12-11 2000-11-16 Fraunhofer Ges Forschung Procede de fabrication de beton leger, granulats pour ce beton et dispositif de criblage de la matiere granulee
WO2001031132A1 (fr) * 1999-10-27 2001-05-03 Walter Krassnitzer Materiau de construction et d'isolation
EP1457615A1 (fr) * 2003-03-10 2004-09-15 Kastell GmbH Elément de paroi avec des sphères de matière polystyrène
CN112723912A (zh) * 2021-02-06 2021-04-30 呼伦贝尔学院 用于高寒地区免烧火越冬大棚的装配式墙体

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