| 主权项 |
1. A production process, comprising:
introducing a concrete into a mould, the mould comprising a bottom shell and a top shell on the bottom shell closing the mould, the concrete being confined in the mould; placing the mould in an envelope comprising a vacuum port; creating a low pressure in the envelope formed by a gas flow passing through the vacuum port; deforming the mould by a deforming member located beneath the mould, the mould lying horizontally when the deforming member is not deforming the mould; stopping the gas flow; and applying pressure, by a pressure module different from the envelope and the deforming member, on at least a portion of the mould, optionally with interposition of the envelope, at least after the gas flow has stopped. |
