International Commission on Irrigation & Drainage Commission Interationale des Irrigation et du Drainage
5941. Vacuum liner : A special form liner made of two layers of screen or wire mesh covered by a layer of cloth. The liner is sealed with rubber or caulking material around the edges of the form panel or unit. A series of openings in the form panel backing is connected to vacuum pump, so a vacuum can be created on the surface of freshly poured concrete. See `Formwork with vacuum chambers` | ||
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