Spray Applied Polymer Surface Seals - TSP2
Spray Applied Polymer Surface Seals - TSP2
Spray Applied Polymer Surface Seals - TSP2
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Lessons Learned<br />
Fog Seal<br />
Permeability<br />
AZ 87 – high permeability (>100x10 -4 cm)<br />
• Will rejuvenator work if emulsified oil<br />
can infiltrate into the aged asphalt?<br />
These results seemed puzzling until lab permeability results for this pavement were<br />
found to be essentially zero. Clearly, rejuvenator oils could not infiltrate to soften<br />
oxidized asphalt near the surface. Only direct mixture testing could accurately<br />
characterize the mixture in the zone where block crack initiation is likely to occur.<br />
Fortunately, results for rejuvenator seals applied to the more permeable Arizona<br />
dense mix were much more in line with expectations that rejuvenator seals can<br />
soften aged asphalt. Here, the Reclamite rejuvenator emulsion did soften the<br />
pavement surface layer as would have been predicted by the binder extraction. In<br />
fact, the rejuvenated binder was even softer than the second thin pavement layer in<br />
both cases. As expected, the harder emulsion residues in the sealer products had<br />
much less impact on the rheology of the surface layer, although they do appear to<br />
help retard oxidation when applied to the right pavements at the right time.<br />
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