Test item low-strength flexible conventional LFC1 was 20 feet
shorter than the other test items, and only one trench was opened in it to
characterize the strength of the subgrade. Test item LFC2 failed uniformly
along its length and within each traffic path. The CBR of each traffic path of
test item LFC2 was therefore characterized by opening two trenches: west and
were not opened in LFC3.
Post-traffic trench measurements were made in
the traffic paths at the surface of the subgrade, and at depths of 12 and 24
inches from the top of the subgrade. Each CBR value was calculated as the
average of at least 3 measurements, with three penetrations per measurement.
following table summarized the CBR values measured during Post Traffic Testing.
More detailed data can be found in the report listed at the end.