Spray Applied Polymer Surface Seals - TSP2

Lessons Learned
IFI
(International Friction Index)
Friction of
Newly Treated MN TR 112
With & Without Sand
Sanding increases friction
0.35
0.3
0.25
0.2
0.15
0.1
0.05
0
Unsanded
Sanded
Control CRS 2P Pass QB LD7 Reclamite
Treatment
From Dynamic Friction Tester/ Circular Texture Meter immediately after application and curing.
Tested by North Central Superpave Center
Friction of Newly Treated MN TR 112 With and Without Sanding
Sanding strategies should depend upon the emulsion residue rheology. The
rejuvenator supplier recommended waiting twenty to forty minutes before sanding to
avoid leaving oil-saturated sand on the surface. With harder residue emulsions, the
sand was applied immediately after fogging, creating more surface texture. The
graph shows that sanding greatly improved the early friction for all sealed sections,
but did not quite achieve the pre-treatment level.
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