Loresco type DW-1 is a sized carbon
backfill with particles ranging between 0.1 to 1 mm. DW-1 weighs
seventy-four pounds per cubic foot and sinks readily in water or light mud.
The fixed carbon content of DW-1 is over ninety-nine percent.
Being a sized and predominantly round material, DW-1 may be installed by
either pumping or pouring. Approximately seven gallons of water per one
hundred pounds of backfill should be utilized when pumping. DW-1 wets easily
and only minimum agitation is necessary before pumping.
Installation:
Loresco DW-1 may be poured freely into dry applications. Tamping is not
required. When it is applied by pumping, the recommended method is to pump
from the bottom of the bored hole upward. After the application pipe (a
one-inch steel pipe) is lowered down to the bottom of the bored hole, it is
coupled to a 20 GPM pump with a minimum capacity of 250 psi. Normally, the
application pipe does not have to be raised during pumping procedures.
Horizontal Installation Procedure:
