Pavement Preservation Journal - Spring 2014 - (Page 32)
Under Tight Deadline,
Deep Injection Process
Stabilizes Missouri U.S. 65
On U.S. 65, grid pattern provides guidance during UDI injection process
MoDOT completed falling weight deflectometer (FWD) testing while Uretek finished DCP testing on
the problem area of concern
ust weeks before Memorial Day
2011, the Missouri Department
of Transportation, District 2, was
faced with a roadway which
began to rapidly deteriorate under
traffic loads. With little time to spare
in advance of the holiday weekend,
an innovative process involving deep
injection of expansive, high density
polymer material into the highway's
sub-base was used to quickly and
economically stabilize the highway's
base and sub-base.
U.S. Highway 65 is a two-lane
asphalt highway with gravel shoulders.
This area of Missouri is mostly farm
land, amid rolling prairie and small
stream crossings. Near the intersection
of U.S. 65 and State Road WW-about
70 miles east of Kansas City-MoDOT
had begun a project to lower the crest
of a troublesome hill by 5 ft. in order to
enhance driver visibility. To expedite
the repair, MoDOT had completely
closed this roadway section and
detoured all traffic.
On Wednesday, May 18, an empty
18-wheeler had caused wide cracks in
the exposed base course of the road.
Later the same day a MoDOT coring
rig created a 2-in. rut in the base as it
backed away from the coring spot. The
base course material was 10 to 12 in.
of reclaimed asphalt pavement (RAP)
mixed into crushed stone. The sub-base
soil was comprised of "in-situ" materials
taken from a nearby hillside cut.
MoDOT project personnel surmised
that the problem was likely this
composite subgrade material. The
localized area of concern for stabilization
of the sub-base was a 541 ft. long X 24 ft.
wide section totaling 12,984 sq. ft. where
the vehicle transit damage had occurred.
View past issues of the Pavement Preservation Journal online at www.naylornetwork.com/fpp-nxt
Table of Contents for the Digital Edition of Pavement Preservation Journal - Spring 2014
Late Season, Long Haul Means WMA for Grand Canyon Surfacing
It’s Easy to Educate Legislators with Congressional Field Visits
NCAT Update: Benefit Curves for Pavement Preservation
N.H. Pavement Preservation Wins 2013 Sorenson Award
Report: Pavement Albedo Inadequate to Mitigate Urban Heat Island Effect
IGGA: Illinois Execs Honored with IGGA’s Promotion Award
Under Tight Deadline, Deep Injection Process Stabilizes Missouri U.S. 65
TPPC: Sustainable Pavement Preservation
Surface Retexturing, Rejuvenation Boost N.C. Interstate Performance
Breakaway Sign Posts, Color Make for Safer Roadways
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Pavement Preservation Journal - Spring 2014