ASTM E 965 Modified Sand Test

Treated pavement

Untreated area with loss of surface fines

ASTM E 965 Modified Sand Test of treated (43" above left) and untreated (36" above right) pavement. Test measures the ravel and loss of fines from the pavement surface. These are the first signs of the oxidation occurring at the surface. This shows approx 14% change in surface material loss in 2 years.

"The oxidative aging of pavements begins at the time of construction and continues throughout a pavement's life. However, most aging occurs within the first two to four years of service life. This results in the top half-inch or so of environment. This can result in raveling and/or premature cracking, which begins at the pavement surface." Foundation for Pavement Preservation.

Untreated                0.03 gal/SY         0.015gal/SY

Biorestor is clear and does not affect stripping - this state route was treated within 60 days of paving and line markings were not effected by the Biorestor treatment applied. Construction joint was applied at 0.03 gal/sy 2' wide and balance of right side of road at 0.015gal/sy.

Many states are looking for a preservation treatment for the construction joint. In the last 3 years Tennessee DOT has been aggressive in proactive construction joint treatment.

"Premature longitudinal joint failures provide pavements with the ability to ravel, propagate cracks throughout the mainline, and ultimately destroy the pavement prior to reaching its desired design life." Tennessee Department of Transportation