Abstract:
No matter what kind of building activity is
planned, be it houses, factories, roads, bridges,
silos or just walls - gravel and sandworks are
needed everywhere.
In most cases desposits of raw gravel and sand
contain impurities, and the extracted material
must be processed to meet the quality requirements
for building materials. Such impurities are
mostly clay, loam, wood or coal. They can be removed
by washing processes. It depends on the
extent of pollution and the kind of pollution material,
which process and which machine are to
be applied.
