WO1980000811A1 - Procede et moyens pour la fabrication de beton leger - Google Patents

Procede et moyens pour la fabrication de beton leger Download PDF

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Publication number
WO1980000811A1
WO1980000811A1 PCT/DK1979/000044 DK7900044W WO8000811A1 WO 1980000811 A1 WO1980000811 A1 WO 1980000811A1 DK 7900044 W DK7900044 W DK 7900044W WO 8000811 A1 WO8000811 A1 WO 8000811A1
Authority
WO
WIPO (PCT)
Prior art keywords
concrete
tank
mixing
plant
circulation
Prior art date
Application number
PCT/DK1979/000044
Other languages
English (en)
Inventor
S Mortensen
Original Assignee
Saamoconsult Aps
S Mortensen
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 Saamoconsult Aps, S Mortensen filed Critical Saamoconsult Aps
Publication of WO1980000811A1 publication Critical patent/WO1980000811A1/fr

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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
    • B28C5/38—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions wherein the mixing is effected both by the action of a fluid and by directly-acting driven mechanical means, e.g. stirring means ; Producing cellular concrete
    • B28C5/381—Producing cellular concrete
    • B28C5/386—Plants; Systems; Methods

Definitions

  • the invention relates to a method and means for the manufacturing of light-weight concrete with innumerable small closed cavities on basis of usual ingredients, namely concrete, sand, water and gas generating means.
  • Lightweight-concrete which is concrete with a specific gravity of between 600 and 1200 kg/cubic metre is manufactured on basis of concrete with admixed gas generating chemicals, where gas blows occur by gas generation in the fresh concrete. After placing this concrete in forms, the concrete will swell on account of the gas generation. After the swelling in the form the surface can be scraped off, so that smooth lateral faces will occur all over the castings. Then the castings may be cut into suitable pieces, f.ex. by means of wires which are drawn through the castings, and the pieces are lead into an autoclave in order to harden in the steam chamber. After the treatment in the autoclave the lightweight-concrete elements are ready for use.
  • the size of the elements is limited by the chamber size of the autoclave, and the usual manufacturing is therefore restricted to building blocks and rather small elements. Further it is only possible to deposit the lightweight-concrete in a form in a way which requires a succeeding adjustment after the depositing in order to make the surface even and in order to fill the form totally. This means that the depositing must take place with a surplus of concrete which is later on scraped off, and it is not possible to use the scraped off material again. Furthermore the concrete is manufactured in such plants where the manufacturing cannot be regulated in dependence of the consumption and consequently it cannot be adjusted to the consumption in a suitable way.
  • the means for the performance of the method according to claim 3 are particularly advantageous, as they make it possible to harden the poured concrete at a normal temperature and pressure in atmospheric air, and thus it is possible to manufacture concrete elements without needing time in the autoclave for the hardening. This is another advantage by mobile plants which are to be as light and simple as possible. Further the highly energy requiring autoclaving is avoided.
  • the performance of the method is initiated by supplying to the first mixing tank 1 suitable quantities of concrete and water which will be explained later on.
  • the reaction means i.e. the parts of the gas generating means which do not by themselves generate gas, may be added together with concrete in the first mixing tank, whereby the mixture will be an optimum, as the concrete and the reaction means are mixed through the whole plant.
  • the mixing of the concrete parts in the tank takes place by means of a pump 10 which has to be a pump for strongly grinding mediums.
  • a preferred pump has a pump body with rotor bladewheels as well as centrally placed inlets and a pressure socket placed along the circumference. From the bottom of the tank the mixture slides into the pump 10 and from the pressure socket of this further on into a closed pipe 11 to a valve 30. From here the material can either be pumped through a circulation back to the tank 1 or, through blockading of this circulation and opening of the valve 30 for further transportation, it may be pumped to the next mixing tank 2. This agitator mixing of the materials in the tank is particularly efficient, as everything passes through the pump in which the dispersing takes place. At the same time the pump is utilized as the materials are either mixed or transported by means of the pump during the operation.
  • a suitable quantity of sand is added in the next mixing tank 2 . Then it is mixed by means of the pump 12 and the circulation via the pipe 13 and the valve 31. When the mixing is finished, the circulation is blockaded at the valve 31, and a pipe is opened to an intermediate tank 3.
  • the moisture content of the mixture is controlled by means of a meter 15 and ad justment is made, f.ex. by means of a water adding device 14. By this the proper consistency of the mixture is ensured.
  • an agitator mixing takes place by means of a pump 16 with circulation through a valve 32.
  • the mixture is pumped via the pipe 17 and a valve 18 to one or more measuring tanks 4 and 5.
  • a certain quantity of concrete has been pumped f.ex. into the tank 4, which is registered in the shown example by a weighing device 19, the supply of concrete is interrupted by the valve 18. Then the agitator mixing 6 is opened for draining off.
  • the gad generating means f.ex. aluminium powder
  • a weighing device 21 the gad generating means, f.ex. aluminium powder
  • the whole material is agitator mixed by means of a pump 23 which agitator circulates the concrete via a circulation 25 and blocking valve 33.
  • the pumping 11 to the place of concreting can take place through blockading the valve 33 and through opening of the valve 8 to the outlet pipe 9 .
  • the form 27 is shown to the right in a reduced scale and in vacant condition. In the middle the form is shown in filled condition and with a meter 28 placed in the form, so that exactly the quantity of concrete can be filled in which is necessary to fill the form totally after the swelling of the concrete. To the left the form is shown with swelled concrete, the surface of which centres exactly with the upper edge of the form.
  • reaction means can be used a mixture of f.ex. ferro-silicon, condensate of melamine and formaldehyde and sodium flouride.
  • the reaction means are without oxygen and other ingredients which give damage to concrete.
  • any generally existing kind of sand with a particle size of up to 1,5 mm can be used.
  • the mixture hardens chemically in air.
  • the ready mixture is easy flowing and distributes in the form like a fluid contrary to usual concrete which is to be vibrated. Within one hour the volume is increased by about 85% and after 24 hours the form may be emptied.
  • the specific weight is now about 800 kg/cubic metre and the surface is even all over.
  • the lightweight-concrete can be concreted together with general concrete elements, and can furthermore be reinforced in the usual way.
  • the specific weight may further be regulated within wide limits depending on the mixing proportion, and other materials can be added according to requirements such as perlite, vermiculite, dying means etc.
  • this method can also be used for manufacturing elements which are concreted in situ, f. ex. by concreting around reinforcing iron in f.ex. buildings, and the plant may also advantageously be used for manufacturing usual known mortar and concrete.
  • the method is economic in use as it mixes the ingre ⁇ dients efficiently together, which means that these are utilized to an optimum, and the finished product will be of an even quality.
  • the plant is simple and nonexpensive as well concerning the manufacturing as the operation, adn it has a high efficiency.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)

Abstract

Par les moyens connus pour la fabrication de beton leger de grosses unites melangeuses sont utilisees ainsi que des autoclaves dans lesquels durcissent les elements en beton. Ceci rend impossible le depot du beton sur les lieux meme de la construction et la taille des autoclaves limite la taille des elements. Cette necessite est respectee au moyen d'un procede dans lequel les cuves individuelles de melange sont des unites de melange independantes assurant un melange par agitation au moyen d'une pompe au travers de laquelle s'effectue la circulation vers la cuve, melangeant ainsi les materiaux. En prevoyant que l'avant derniere cuve soit une cuve de mesure (4, 5) et que la derniere (6, 7) soit un recipient de melange d'un appareillage dans lequel sont ajoutes, les moyens de generation de gaz une fabrication continue de beton est assuree laquelle peut etre ajustee selon les besoins. De plus, le nettoyage de l'appareillage est simple car il est possible de pomper l'eau au travers de l'appareillage et de le rincer. En utilisant partiellement des moyens de reaction et partiellement des moyens de generation de gaz, un beton leger peut etre fabrique qui durcit a temperature et pression normales a l'air atmospherique et par lequel le passage en autoclave peut etre totalement evite.
PCT/DK1979/000044 1978-10-27 1979-10-29 Procede et moyens pour la fabrication de beton leger WO1980000811A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DK4786/78 1978-10-27
DK478678A DK478678A (da) 1978-10-27 1978-10-27 Fremgangsmaade og middel til fremstilling af letbeton-elementer

Publications (1)

Publication Number Publication Date
WO1980000811A1 true WO1980000811A1 (fr) 1980-05-01

Family

ID=8136646

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DK1979/000044 WO1980000811A1 (fr) 1978-10-27 1979-10-29 Procede et moyens pour la fabrication de beton leger

Country Status (3)

Country Link
EP (1) EP0020575A1 (fr)
DK (1) DK478678A (fr)
WO (1) WO1980000811A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1986000881A1 (fr) * 1984-07-27 1986-02-13 Ludovic Hunkeler Element de construction agglomere au ciment ainsi que procede et dispositif pour sa fabrication
FR2659594A1 (fr) * 1990-03-15 1991-09-20 Lemasson Paul Procede de realisation d'un element a partir d'un melange de pouzzolane et de ciment, l'installation de mise en óoeuvre et les produits obtenus.
WO1994004331A1 (fr) * 1992-08-24 1994-03-03 Stephens Patrick J Procede et appareil de melange et d'injection continus de coulis de ciment expanse
US5419632A (en) * 1991-04-02 1995-05-30 Stephens; Patrick J. Method and apparatus for continuous mixing and injection of foamed cement grout
US7942658B1 (en) 1999-09-15 2011-05-17 Advanced Building Systems, Inc. Systems for forming lightweight concrete block

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107520963B (zh) * 2017-08-01 2020-06-16 南宁兴典混凝土有限责任公司 一种混凝土制备用减水剂料桶

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK40438C (da) * 1928-05-03 1929-07-08 Bygnings Georg O Richter & Sch Fremgangsmaade til Fremstilling af et porøst Bygningsmateriale.
US2513012A (en) * 1947-08-14 1950-06-27 Higgins Ind Inc Mixing machine
US2664277A (en) * 1950-09-11 1953-12-29 Colcrete Ltd Cement mixer
DE1942783A1 (de) * 1968-08-23 1970-09-03 Laing & Son Ltd John Plastisches Beton- oder Moertelgemisch und Verfahren zu dessen Herstellung
DE2036842A1 (de) * 1969-10-21 1971-05-13 Southwest Research Institute San Antonio, Tex (V St A) Geschäumtes Produkt aus Alkalimetall Silikaten und Verfahren zur Herstellung desselben
SE338533B (fr) * 1970-03-24 1971-09-06 Ytong Ab
DE2227640A1 (de) * 1972-06-07 1973-12-20 Bayer Ag Verfahren zur verschaeumung von waessrigen silicatloesungen
SE390296B (sv) * 1972-05-03 1976-12-13 Intong Ab Isolermaterial, serskilt isolerbetong samt forfarande for framstellning av materialet

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK40438C (da) * 1928-05-03 1929-07-08 Bygnings Georg O Richter & Sch Fremgangsmaade til Fremstilling af et porøst Bygningsmateriale.
US2513012A (en) * 1947-08-14 1950-06-27 Higgins Ind Inc Mixing machine
US2664277A (en) * 1950-09-11 1953-12-29 Colcrete Ltd Cement mixer
DE1942783A1 (de) * 1968-08-23 1970-09-03 Laing & Son Ltd John Plastisches Beton- oder Moertelgemisch und Verfahren zu dessen Herstellung
DE2036842A1 (de) * 1969-10-21 1971-05-13 Southwest Research Institute San Antonio, Tex (V St A) Geschäumtes Produkt aus Alkalimetall Silikaten und Verfahren zur Herstellung desselben
SE338533B (fr) * 1970-03-24 1971-09-06 Ytong Ab
SE390296B (sv) * 1972-05-03 1976-12-13 Intong Ab Isolermaterial, serskilt isolerbetong samt forfarande for framstellning av materialet
DE2227640A1 (de) * 1972-06-07 1973-12-20 Bayer Ag Verfahren zur verschaeumung von waessrigen silicatloesungen

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1986000881A1 (fr) * 1984-07-27 1986-02-13 Ludovic Hunkeler Element de construction agglomere au ciment ainsi que procede et dispositif pour sa fabrication
FR2659594A1 (fr) * 1990-03-15 1991-09-20 Lemasson Paul Procede de realisation d'un element a partir d'un melange de pouzzolane et de ciment, l'installation de mise en óoeuvre et les produits obtenus.
US5419632A (en) * 1991-04-02 1995-05-30 Stephens; Patrick J. Method and apparatus for continuous mixing and injection of foamed cement grout
WO1994004331A1 (fr) * 1992-08-24 1994-03-03 Stephens Patrick J Procede et appareil de melange et d'injection continus de coulis de ciment expanse
US7942658B1 (en) 1999-09-15 2011-05-17 Advanced Building Systems, Inc. Systems for forming lightweight concrete block

Also Published As

Publication number Publication date
EP0020575A1 (fr) 1981-01-07
DK478678A (da) 1980-04-28

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