EquipmentWorld.com | August 2015
59
good complement to
traditional construc-
tion methods," says
Mark Stahl, Dunn
Company vice presi-
dent of operations.
"As an intermediate
layer, CIR provides
the structural strength
and fl exibility that
make the wearing
courses more durable
and make the pave-
ment last longer. And
by re-using materi-
als in-place for the
intermediate layer,
we help the wear-
ing courses perform
better while reducing
the time, cost and
environmental impact
of projects. That
benefi ts agencies as
well as the taxpaying
public."
Untitled-16 1 5/18/15 3:19 PM
The time for fresh, extracted liquid foamed asphalt to subside by
half – its 'half life' – is measured in bucket; Caltrans recommends
binder half-life of at least 12 seconds and expansion ratio of 10 to
be desirable for adequate dispersion and foaming consistency.
Photo:
Tom
Kuennen
