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8/18/2019 2015 - M-37 High Friction Surface Treatment (HFST)
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M-37 High Friction SuTreatment (H
Presented by: Tr
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Background and Project Details
• HFST is a new procedure for MDOT and its roads. This will be the firsNorth Region to use the HFST treatment.
• The Polymer Resin Binder was spread on the existing surface at 30 sq
• The Bauxite aggregate had to be laid within 5 minutes of the resin be
order to ensure proper adhesion.
• The surface was not to be disturbed until the resin has had ample timapproximately 3 hours.
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Surface Preparation• The entire surface of the pavement required grinding in order to provide a adequa
the resin to adhere. This was done with a self contained small machine equipped wto collect debris.
•This machine also removed the existing pavement markings. Anything that was nby the machine was removed afterwards using a hand grinder.
• After the pavement was prepared all remaining debris was removed using backpa
Surface BeforeGrinding
Surface AfterGrinding
Surface BeforeGrinding
Surface AfterGrinding
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Prepared cleaned su
Hand Grinding toremove PavementMarkings
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Grinding Off Surface of Existing Pavem
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Epoxy Application
• The polymer resin binder was hand mixed for 3 minutes prior to being place
• The binder was placed at a rate of 30 sqft per gallon of mix. Each tub of mix gallons of resin.
• The resin was spread over the area using a squeegee until it was evenly distr
Special shoes with 1” spi
to avoid disturbing the b
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Application of thePolymer Resin Binder
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Bauxite Aggregate Application• Bauxite is a very hard aggregate that is heated in kilns to remove moisture.
• When crushed Bauxite retains sharp edges which makes it ideal for skid resistance.
• The Bauxite aggregate was loaded into the pressurized sand spreader using a sky track load
• Within 5 minutes of the resin being placed, the bauxite was sprayed over the applied area.
• The aggregate was applied excessively(2-3 inches thick) to ensure total coverage of the ent
BauxiteAggregate
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Bauxite Aggregate
Application
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Recycle Excess Bauxite• After approximately 3 hours to cure, the excess bauxite was swept up into a loader bucket
• The used bauxite was poured into a funnel with a sieve in order to filter out any foreign mate
excess bauxite can be reused for further applications
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Finished Product
High FrictionSurface
OrSu
High Friction
Surface
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Project Information
•Job number: 126551A
• Contract ID: 28051-126551
• Item Number: 1507 058
• Special provision for High Friction Surface Treatment
• 12SP800(A)
• FHWA:APPR: 04-21-14