(19) |
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(11) |
EP 0 440 591 A3 |
(12) |
EUROPEAN PATENT APPLICATION |
(88) |
Date of publication A3: |
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20.05.1992 Bulletin 1992/21 |
(43) |
Date of publication A2: |
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07.08.1991 Bulletin 1991/32 |
(22) |
Date of filing: 30.01.1991 |
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(84) |
Designated Contracting States: |
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AT BE CH DE DK ES FR GB GR IT LI LU NL SE |
(30) |
Priority: |
02.02.1990 FI 900548
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(71) |
Applicant: LOHJA BETONILA OY |
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SF-03100 Nummela (FI) |
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(72) |
Inventor: |
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- Virtanen, Olli
SF-21600 Parainen (FI)
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(74) |
Representative: Roth, Ernst Adolf Michael et al |
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GÖTEBORGS PATENTBYRA AB
Box 5005 S-402 21 Göteborg S-402 21 Göteborg (SE) |
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(54) |
Method for producing a concrete pillar |
(57) The invention concerns a method for producing a concrete pillar, said method being
based on the shotcreting of an appropriately shaped frame structure of the concrete
pillar with concrete, and said frame structure is simultaneously rotated on a rotating
shaft (2) attached to the frame structure while being shotcreted with concrete, and
said shotcreted concrete surface is shaped after shotcreting with the help of, e.g.,
a collar (4) having a desired shape. The concrete pillar is allowed to harden while
being attached to the rotating shaft (2), and after hardening, the surface of the
concrete pillar is ground with a grinding apparatus (5), and the concrete pillar is
rotated on its rotating shaft either in the same rotating equipment in which the concrete
pillars are shotcreted, or alternatively, in a separate grinding apparatus.