B - Operations – Transporting – 28 – B
Patent
B - Operations, Transporting
28
B
B28B 21/18 (2006.01) B28B 7/30 (2006.01) B28B 7/46 (2006.01) B28B 21/38 (2006.01)
Patent
CA 2483452
A method of moulding long concrete articles in a vertical mould which incorporates a mould liner (17) with drainage tubes (5) used to dewater the concrete when the mould is filled. The improvement is to close off the drainage tubes (5) during the filling of the mould to inhibit water loss in the concrete during filling. The drainage tubes (5) may incorporate one way valves or include inner tubes (15) that may be pressurized to inhibit water entering the drainage tube (5).
L'invention concerne un procédé de moulage d'articles en béton allongés dans un moule vertical comprenant une enveloppe de moule (17) pourvue de tubes de drainage (5) utilisés pour déshydrater le béton lorsque le moule est rempli. L'amélioration consiste à fermer les tubes de drainage (5) pendant le remplissage du moule en vue d'empêcher la perte d'eau dans le béton pendant le remplissage. Les tubes de drainage (5) peuvent comprendre des valves de retenue ou des tubes intérieurs (15) pouvant être mis sous pression afin d'empêcher l'eau d'entrer dans les tubes de drainage.
Osler Hoskin & Harcourt Llp
Vertech Hume Pty Ltd
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