The flume supporting columns are
frequently concrete as is the paving
material used under the piles. Concrete
is, however, subject to corrosion by the
organic acids created by the fermentation
of the residual sugars and other water
solubles in the bagasse. A protective
coating, such as epoxy resin, should he
used to prevent corrosion of the wet bulk
storage slabs and the concrete columns if
used to support a fume. Asphalt is not
very suitable, as pieces are usually
picked up when the bagasse is reclaimed.
Asphalt is difficult to remove before or
after digesters and can cause many
problems throughout the pulp and paper
mill.