Pavement Preservation Journal - Spring 2018 - 19

between 24 to 48 hours on high-volume
roadways.
HFST SPEC, GUIDELINES
After discussions with FDOT and industry leaders, many of these recommendations have been incorporated into a
revised FDOT specification. In addition,
a user-ready booklet, titled High Friction
Surface Treatment Guidelines: Project
Selection, Materials, and Construction, was
developed to mirror the FDOT specification

and provide additional insight into many
requirements and recommendations.
The document can be obtained by
contacting Charles Holzschuher at the
FDOT State Materials Office (charles.holzschuher@dot.state.fl.us), or downloaded
at no charge at http://www.fdot.gov/materials/pavement/performance/ndt/documents/hfstguidelines.pdf.
Adapted by Pavement Preservation Journal
from the original report

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shot blasting to a texture level of concrete
surface profile (CSP).
Many problems associated with poor
mixing, uneven resin binder thickness,
and insufficient aggregate coverage could
be solved by using automated application
equipment. The researchers recommend
Florida DOT adopt this requirement into its
specification. This is expected to increase
the cost of HFST early on, especially since
very few companies have this capability.
With time, as more vendors enter to compete, the costs are expected to decrease.
Neither the gel time test nor the Fourier
transform infrared spectroscopy (FTIR) test
are recommended as quality control methods. The tests are not sensitive enough to
misproportioning except at extremes, and
therefore, the tests are not substitutes for
proper maintenance and calibration of the
application equipment.
Still, the simple gel time test does have a
place to ensure against major problems. The
required mil thickness in the current HFST
specification is adequate and the researchers recommend that contractors and inspectors check the actual mil thickness from time
to time with a thin film thickness gauge.
Currently the contractor is required to
sweep after the initial cure and do follow-up
sweeping after two weeks. The researchers recommend another follow-up sweep

Gilsonite Modified
Asphalt Seal Coat

LIF

SM

New guidance may be downloaded at
www.fdot.gov/materials/pavement/
performance/ndt/documents/hfstguidelines.pdf

E
E C YC L E A SS

S

www.asphaltsystemsinc.com * 801.972.2757

Spring 2018 | PAVEMENT PRESERVATION JOURNAL

19

7/31/17 8:01 PM


http://www.asphaltsystemsinc.com http://www.fdot.gov/ http://www.asphaltsystemsinc.com

Table of Contents for the Digital Edition of Pavement Preservation Journal - Spring 2018

President’s Message
New NCHRP Guidance Targets Pavement Preservation Performance
Florida Tackles Premature Failures of High Friction Surface Treatments
Oklahoma: High-Friction Surface Treatments Perform on Interstates
NCAT Track Conference Will Provide Look at Pavement Preservation Sections
FP2@TRB 2018
Bi-Partisan ‘problem Solvers Caucus’ Works to Move Infrastructure Reform
Research: Longitudinally Textured PCC Pavement Most Energy-Efficient Surface
Not Just Pavements: Micro Surfacing Right for New York’s Brooklyn Bridge
Profiles in Preservation: Crack Sealants
Index of Advertisers
Pavement Preservation Journal - Spring 2018 - Intro
Pavement Preservation Journal - Spring 2018 - cover1
Pavement Preservation Journal - Spring 2018 - cover2
Pavement Preservation Journal - Spring 2018 - 3
Pavement Preservation Journal - Spring 2018 - 4
Pavement Preservation Journal - Spring 2018 - 5
Pavement Preservation Journal - Spring 2018 - 6
Pavement Preservation Journal - Spring 2018 - 7
Pavement Preservation Journal - Spring 2018 - 8
Pavement Preservation Journal - Spring 2018 - President’s Message
Pavement Preservation Journal - Spring 2018 - 10
Pavement Preservation Journal - Spring 2018 - New NCHRP Guidance Targets Pavement Preservation Performance
Pavement Preservation Journal - Spring 2018 - 12
Pavement Preservation Journal - Spring 2018 - 13
Pavement Preservation Journal - Spring 2018 - 14
Pavement Preservation Journal - Spring 2018 - Florida Tackles Premature Failures of High Friction Surface Treatments
Pavement Preservation Journal - Spring 2018 - 16
Pavement Preservation Journal - Spring 2018 - 17
Pavement Preservation Journal - Spring 2018 - 18
Pavement Preservation Journal - Spring 2018 - 19
Pavement Preservation Journal - Spring 2018 - 20
Pavement Preservation Journal - Spring 2018 - Oklahoma: High-Friction Surface Treatments Perform on Interstates
Pavement Preservation Journal - Spring 2018 - 22
Pavement Preservation Journal - Spring 2018 - 23
Pavement Preservation Journal - Spring 2018 - 24
Pavement Preservation Journal - Spring 2018 - NCAT Track Conference Will Provide Look at Pavement Preservation Sections
Pavement Preservation Journal - Spring 2018 - FP2@TRB 2018
Pavement Preservation Journal - Spring 2018 - 27
Pavement Preservation Journal - Spring 2018 - 28
Pavement Preservation Journal - Spring 2018 - Bi-Partisan ‘problem Solvers Caucus’ Works to Move Infrastructure Reform
Pavement Preservation Journal - Spring 2018 - 30
Pavement Preservation Journal - Spring 2018 - Research: Longitudinally Textured PCC Pavement Most Energy-Efficient Surface
Pavement Preservation Journal - Spring 2018 - 32
Pavement Preservation Journal - Spring 2018 - 33
Pavement Preservation Journal - Spring 2018 - 34
Pavement Preservation Journal - Spring 2018 - 35
Pavement Preservation Journal - Spring 2018 - Not Just Pavements: Micro Surfacing Right for New York’s Brooklyn Bridge
Pavement Preservation Journal - Spring 2018 - 37
Pavement Preservation Journal - Spring 2018 - 38
Pavement Preservation Journal - Spring 2018 - Profiles in Preservation: Crack Sealants
Pavement Preservation Journal - Spring 2018 - 40
Pavement Preservation Journal - Spring 2018 - Index of Advertisers
Pavement Preservation Journal - Spring 2018 - 42
Pavement Preservation Journal - Spring 2018 - cover3
Pavement Preservation Journal - Spring 2018 - cover4
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