Mixing
The base must be undamaged, clean, and damp enough to be darker in colour. If necessary, remove the weak-strength cement paste layer. Best adhesion can be achieved to a rough base. The mould must be tight, because the grouting concrete is very pliable and flows easily. Normal casting can be carried out from one side. Thus, build that side's mould higher than usual and, if necessary, also wider, so that the grouting concrete can fill the casting space under its own weight. When using galvanised steels, you must make absolutely sure that the coating has become passive.
Work instructions
We recommend casting as soon as possible after mixing the mass, as this allows the full utilisation of the expansion of the fresh mass. The mass is so pliable that compacting is not usually necessary. The flow can be enhanced by ramming or light vibrating. When doing thick casting layers (over 50 mm), you should do the casting in several layers. Each layer must be allowed to harden for at least one day before the next casting. Do not allow the freshly cast concrete to freeze. The lowest usage temperature is +5°C.
After treatment
You must care for the cast surface by spraying with water and/or protect it with a plastic film. The need for aftercare depends on the conditions. It should continue for at least one to three days.
Storage and handling of waste
See the separate storage and disposal instructions https://www.fescon.fi/en/material-bank