Creating a separating layer between a backfill concrete shell and a site-mixed concrete shell

摘要

To create a separating layer between a backfill concrete shell (2) and a site-mixed concrete shell, there is erected directly in front of the backfill mat (3) a light shuttering (1) which holds back as a separating layer the concrete slurry (5) passing through the backfill mat (3) from the backfill concrete. By selecting the mesh of the backfill mat, the grain size of the separating layer can be influenced. <IMAGE>