Observations of the resulting seal coat are the basis for adjusting TVAR percentages or for going back to uniformly applied asphalt. The same inspection techniques appropriate for determining if uniformly applied asphalt rates are proper are used when inspecting TVAR seal coats.�

Primarily, inspection is by observation of embedment depth both inside and outside of the wheel paths. The inspector should observe embedment depths immediately after rolling and then later after the pavement has been exposed to traffic for a day or two. Normally, approximately 30 percent embedment is desired in the wheel paths after rolling. Slightly higher embedment percentages outside of the wheel paths are satisfactory immediately after rolling. Wheel path aggregate embedment should ideally be seen to increase to 35 to 40 percent within several days under traffic.�

Figure 4-12 may be helpful in making this determination as it shows a maximum desirable embedment percentage after several days of traffic.�