Betonbloc - Sedpa

MANUFACTURE
Manufacturing the blocks
The raw materials are stored in different silos.
The sand has previously been finely ground either
after drying or by humidification (adding water).
The raw materials are pumped from the silos
and are accurately proportioned before being mixed,
with water, in a mixer.
After mixing, the mixture is poured into moulds,
filling them half full.
The lime/aluminium powder chemical reaction releases
hydrogen, which creates a large number of cells and
greatly increases the density.
The miniscule hydrogen bubbles (cells) are quickly
replaced by air. All the cells, totally independent
from one another (closed cells) are encased in
the concrete, hence the name aerated concrete.
Raw materials
Only mineral matter:
- Pure white sand
- Lime
- Cement
- Aluminium powder
Once the lime/aluminium powder reaction has
finished, the concrete mixture has enough
consistency to be removed without losing
its shape.
The concrete mass, at the start of the hardening process,
is cut to the required dimensions with a steel wire.
BETONBLOC® SEDPA is then processed in an autoclave
at 180 C. During this process, mainly calcium hydrosilicates
are released, giving the product its final stability.
Following the autoclaving, of between 8 to 12 hours,
the concrete items have acquired their resistance, their final
properties, and are ready to be used.
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