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 />
Static Bending Test on Rectangular<br />
Specimens Cut from Field Cores (BBR)<br />
Conclusions<br />
Caution: Limited data; tests only in 2006/2007<br />
A promising new test<br />
• Characterizes low temperature behavior where cracking<br />
from oxidation is most likely to occur<br />
<br />
<br />
Dense-graded surface studies showed:<br />
• Rejuvenators soften AC at low temperature, but may decrease<br />
m-value<br />
• <strong>Polymer</strong> modified sealers maintained slightly higher m-values<br />
than control<br />
• Chip seals appear to offer best protection from oxidation<br />
Asphalt/rubber sections on CA 78 had large voids in<br />
mix; BBR results highly variable; no conclusions<br />
Although promising for conventional dense HMA mixes, BBR data from the open,<br />
asphalt rubber surface course on the California Salton Sea project had extremely<br />
high coefficients of variation and could not be used to draw any statistically valid<br />
conclusions.<br />
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