EquipmentWorld.com | November 2015
59
road science
|
by Tom Kuennen
I
nterest is expanding from
preservation of low- and
medium-volume roads to that
of high-volume, interstate-
type pavements.
"Preservation of high-traffi c vol-
ume roadways is just as important
as for low traffi c volume roadways,"
says Jim Moulthrop, executive
director of FP
2
, formerly the Foun-
dation for Pavement Preservation.
"States have limited resources, and
preservation makes those resources
go farther."
Pavement preservation methods
prolong pavement life, avoiding
high future costs of reconstruction
or rehabilitation by spending less
money at critical points in a pave-
ment's life.
There are a variety of methods in
the pavement preservation arsenal,
including slurry surfacings, crack
sealing, chip sealing, micro surfac-
ing, rejuvenation, hot and cold in-
place recycling and thin-lift hot-mix
asphalt paving; and preservation
techniques used in concrete pave-
ment restoration (CPR).
According to the National Cen-
ter for Pavement Preservation at
Michigan State University, spending
a dollar on pavement preservation
can eliminate or delay spending $6
to $10 on future rehabilitation or
reconstruction costs.
PRESERVATION TAKES
AIM AT INTERSTATES
Photo:
Ergon
Asphalt
&
Emulsions,
Inc.
Preservation of interstate: on Georgia's busy I-475 south of
Atlanta, center lane open graded friction courses receive a
rejuvenating fog seal while traffi c continues in adjacent lane.
