Pavement Preservation Journal - Summer 2014 - (Page 19)
Small Aggregate, Polymer
Modifiers Key to New
Texas Thin Lift Mixes
Final mat of SMA thin asphalt overlay on SH 6 access road in Bryan, Tex.
f "thin is in," then the new
pavements being developed by
researchers at the Texas A&M
Transportation Institute (TTI)
and the Texas DOT are all that, and
Instead of the traditional 2-in.
overlays that are typical for road
rehabilitation, TTI researchers
have dared to go much thinner,
developing pavements that are 1 in.
in height and, in one case, a mere
Because these new pavements are
made with high quality stones and
polymer modified asphalt, they are
expected to last longer and require
less maintenance. As a result, state,
county and city officials are jumping
on the thin overlay bandwagon in
order to save taxpayers money and
inconvenience and, at the same time,
provide smoother rides.
In Brazos County, county engineer
Alan Munger is sold on TTI's new
mixes. In July 2013, he supervised the
paving of five roadways with a 1-in.
overlay covering a total of five miles.
This was Brazos County's first use of
the thin mix.
"I am confident that thin lift asphalt
will work," Munger said. "I visited test
sites [State Highway 6 access roads]
where the Bryan TxDOT District placed
TTI's thin lifts, and I was impressed that
the pavements are performing so well."
From now on, Munger says he
plans to incorporate the use of the thin
mixes on higher volume county roads
pavement preservation journal
Table of Contents for the Digital Edition of Pavement Preservation Journal - Summer 2014
FP²: ADA Technical Guidance Driven by Public Perception, Not Engineering Principles
NCAT Update: NCAT Anticipates Preservation in Sixth Test Cycle in 2015
Small Aggregate, Polymer Modifiers Key to New Texas Thin Lift Mixes
Bonded Wearing Courses Get Big Boost in Vermont
Join the World at PPRS Paris 2015!
Sustainability in the Sun: AEMA, ARRA and ISSA Meet in Florida
TPPC: Texas Center Evaluates HWTD Test Temps
Proactive Preservation Prevents Pavement Safety Hazards
Let Subsurface Conditions Help Determine Preservation Candidates
Index of Advertisers
Pavement Preservation Journal - Summer 2014