EP0138106A1 - Procédé pour la production de béton léger - Google Patents

Procédé pour la production de béton léger Download PDF

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Publication number
EP0138106A1
EP0138106A1 EP84111379A EP84111379A EP0138106A1 EP 0138106 A1 EP0138106 A1 EP 0138106A1 EP 84111379 A EP84111379 A EP 84111379A EP 84111379 A EP84111379 A EP 84111379A EP 0138106 A1 EP0138106 A1 EP 0138106A1
Authority
EP
European Patent Office
Prior art keywords
concrete
mixing
polystyrene
added
cement
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.)
Withdrawn
Application number
EP84111379A
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.)
RASTRA AG
Original Assignee
RASTRA AG
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
Application filed by RASTRA AG filed Critical RASTRA AG
Publication of EP0138106A1 publication Critical patent/EP0138106A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
    • B28C5/003—Methods for mixing
    • B28C5/006—Methods for mixing involving mechanical aspects

Definitions

  • the invention relates to a method for producing lightweight concrete using at least water, cement and a lightweight aggregate with a bulk density of less than 1000 kg / m3, in particular polystyrene foam in a concrete mixer provided with a mixing shaft.
  • Lightweight concrete within the meaning of the invention is also to be understood, for example, as pumice concrete or any other concrete whose aggregate has the relatively low spec specified above. Has weight.
  • the procedure is usually that a cement paste of cement and water e.g. is produced in a weight ratio of 2: 1, then this cement paste is mixed with a polystyrene foam or with pumice in a reduced form; the second mixing phase takes place in a separate mixer, whereby in both cases the mixers are set in rotation at the usual speeds of concrete mixers.
  • water is first mixed with polystyrene foam in one and the same concrete mixer and then cement is added in the usual amount.
  • the polystyrene concrete obtained by both processes has lumps, so that the lump formation removes cement from the usual mix.
  • the consequence of this is an impairment of the overall strength of the set or hardened lightweight concrete or polystyrene concrete; there is also a worse possibility of machining because any machining tools under the hard lumps of cement are damaged.
  • the invention has for its object to provide a method for the production of lightweight concrete, in particular polystyrene concrete, by which clumping is effectively prevented.
  • the object is achieved in that, according to the invention, water is poured into the concrete mixer designed as a mixing trough and cement is poured in, the mixing shaft is rotated at a speed which is approximately twice as high as the usual speed of the concrete mixer, and then with the usual addition of the light aggregate Speed is worked.
  • the fresh concrete according to the invention fills the concrete mixer with approx. 3/4.
  • the finished parts can be processed relatively easily using conventional tools.
  • lightweight concrete bodies in particular polystyrene concrete bodies
  • waste products which can be used according to the invention, since in the first mixing phase these waste products from hardened polystyrene concrete bodies can be added in ground form;
  • waste products from polystyrene products are preferably added in comminuted form.
  • eluents can be added in the first mixing phase.
  • the waste products of polystyrene concrete mentioned are preferably added in a ratio of 1: 5 to the total volume of fresh concrete; the grain size of these waste products should preferably be below 7 mm, preferably between 2-6 mm.
  • the polystyrene foam is expediently added in a volume fraction of approximately 70-95%, based on the total volume of the mixed concrete.
  • a polystyrene concrete can be produced, which has a density of 0.3 - 0.35 and still has sufficient strength; cement can also be saved by using the waste products made from shredded polystyrene concrete.
  • a mixing trough 1 with a mixing volume of at least approximately 500 liters and a horizontal axis 2 has a funnel-shaped large opening 3 for feeding in the individual components of the mixture.
  • tapes 4 and 5 of the same width are attached in screw form, which are firmly connected to one another at point 6.
  • the belts 4 and 5 are designed so that sections slide longitudinally in the vicinity of the mixing trough wall and the twisting of the belts ensures intensive mixing.
  • the two bands 4 and 5 are mirror-like in relation to a central cut. As a result, the mix or fresh concrete is conveyed towards the center.
  • the underside 7 of the mixing trough 1 is provided with a slide or a flap 8 through which the fresh concrete is a funnel or a filling device is fed.
  • the flap 8 extends to about 3/4 of the mixing tub length and to a sector of 1/8 to 1/4 of the round circumference.
  • the shaft of the mixer is turned at a speed of 50 - 60 U / min. - So a normal speed for concrete mixers - operated; however, it can also be operated at double speed, i.e. so be rotated at 100 - 120 rpm; it is absolutely necessary to use these different speeds in both mixing phases in order to ensure that the fresh concrete and the end product are free of lumps.
  • 100 kg of water and 200 kg of cement are introduced into the mixing trough 1.
  • 50 kg of polystyrene concrete waste products e.g. Milling chips, each with a grain size of 2 - 6 mm added.
  • a superplasticizer with a weight of 0.012 kg can also be added during the first mixing phase.
  • the concrete mixer is operated at a high speed of 120 rpm for 2 minutes.
  • the cement paste obtained in this way is largely homogenized; then 800 liters of polystyrene foam beads with a density of 10 - 20 kg per m 3 are added .
  • the second mixing phase is rotated at a speed of 60 rpm; the mixing time is 20 seconds
  • the fresh concrete obtained is free of lumps and can be easily worked after hardening.
  • the fresh concrete obtained is free of lumps and can be removed.
  • the mixing trough is washed out after each batch by adding the water for the next batch before the cement is introduced.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
EP84111379A 1983-09-30 1984-09-24 Procédé pour la production de béton léger Withdrawn EP0138106A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3335561 1983-09-30
DE19833335561 DE3335561A1 (de) 1983-09-30 1983-09-30 Verfahren zur herstellung von leichtbeton

Publications (1)

Publication Number Publication Date
EP0138106A1 true EP0138106A1 (fr) 1985-04-24

Family

ID=6210605

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84111379A Withdrawn EP0138106A1 (fr) 1983-09-30 1984-09-24 Procédé pour la production de béton léger

Country Status (3)

Country Link
EP (1) EP0138106A1 (fr)
AU (1) AU3363484A (fr)
DE (1) DE3335561A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT391862B (de) * 1986-11-10 1990-12-10 Stracke Ing Markus Verfahren zur herstellung eines leichtbetones mit polystyrolschaumstoffabfaellen
AT394184B (de) * 1986-05-23 1992-02-10 Stracke Marica Verfahren zur herstellung von leichtbeton
AT394185B (de) * 1987-01-28 1992-02-10 Stracke Ing Markus Verwendung eines polystyrolschaumstoffleichtbetons
CN108656357A (zh) * 2018-05-11 2018-10-16 侯小芳 一种环状射流式多级落料砂浆搅拌装置

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016008203A1 (de) 2016-07-07 2018-01-11 Herrenknecht Ag Vorrichtung und Verfahren zum Einbringen von Trassenband in den Boden
CN108437218B (zh) * 2018-05-11 2020-07-07 山东利鑫新材料集团有限公司 一种气动震动式多级落料砂浆搅拌装置
CN112847786A (zh) * 2021-01-28 2021-05-28 王坚 一种建筑砂浆搅拌设备
CN113276278A (zh) * 2021-06-21 2021-08-20 山东交通学院 一种利用建筑固废制作混凝土的方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH453997A (de) * 1965-08-21 1968-03-31 Richter Adam Vorrichtung zur Herstellung kolloidaler Baustoffmischungen
DE1584519A1 (de) * 1966-06-15 1970-03-19 Rudolf Kalich Vorrichtung zur Durchfuehrung eines Verfahrens zum Herstellen von Zementleim
DE1811033A1 (de) * 1968-11-26 1970-06-11 Karl Stoehr Kg Bauunternehmung Zuschlagstoff fuer Leichtbeton
DE2163526B2 (de) * 1970-12-23 1980-12-18 Societa Italiana Resine S.I.R. S.P.A., Mailand (Italien) Verfahren zur Herstellung von Leichtbauteilen

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1232862B (de) * 1960-02-12 1967-01-19 Eirich Gustav Verfahren zur Herstellung von Frischbeton
LU82862A1 (de) * 1980-10-17 1982-05-10 Arbed Verfahren zum herstellen von bearbeitbarem,leichtem kolloidbeton und gemaess diesem verfahren gewonnenes produkt

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH453997A (de) * 1965-08-21 1968-03-31 Richter Adam Vorrichtung zur Herstellung kolloidaler Baustoffmischungen
DE1584519A1 (de) * 1966-06-15 1970-03-19 Rudolf Kalich Vorrichtung zur Durchfuehrung eines Verfahrens zum Herstellen von Zementleim
DE1811033A1 (de) * 1968-11-26 1970-06-11 Karl Stoehr Kg Bauunternehmung Zuschlagstoff fuer Leichtbeton
DE2163526B2 (de) * 1970-12-23 1980-12-18 Societa Italiana Resine S.I.R. S.P.A., Mailand (Italien) Verfahren zur Herstellung von Leichtbauteilen

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT394184B (de) * 1986-05-23 1992-02-10 Stracke Marica Verfahren zur herstellung von leichtbeton
AT391862B (de) * 1986-11-10 1990-12-10 Stracke Ing Markus Verfahren zur herstellung eines leichtbetones mit polystyrolschaumstoffabfaellen
AT394185B (de) * 1987-01-28 1992-02-10 Stracke Ing Markus Verwendung eines polystyrolschaumstoffleichtbetons
CN108656357A (zh) * 2018-05-11 2018-10-16 侯小芳 一种环状射流式多级落料砂浆搅拌装置

Also Published As

Publication number Publication date
DE3335561A1 (de) 1985-05-02
AU3363484A (en) 1985-04-18

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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AK Designated contracting states

Designated state(s): AT BE CH FR GB IT LI LU NL SE

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18D Application deemed to be withdrawn

Effective date: 19861017

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Inventor name: STRACKE, MARKUS