Depressed transverse cracks in asphalt pavements in Oklahoma phase I interim report (FHWA-OK-89-02) 2159
Abstract
Thi s report describes the results of a preliminary evaluati on of the
nature and extent of depressed transversed cracking of asphalt pavements
in Oklahoma. The primary purpose of the Phase I study was to develop and
evaluate procedures for collecting field data on a larger scale in Phase II.
Four sites were selected using input from Division Maintenance Engineers
for detailed evalua tion. Data such as crack occurrence and distribution,
crack crosssection, pavement crosssection, general topography, general
soils were collected and evaluated. The results of the Phase I evaluation
indicate that:
1. Transverse cracking of asphalt pavements is a prevalent problem
in North Central Oklahoma.
2. The depressionsassociated with transverse cracks occur because of
a combination of factors, including, at a minimum; the type of
subgrade, the stiffness of the asphalt, and the size and number of
vehicles.
3. The field procedure is used to collect test section data, although
time consuming, worked very well .