Preliminary Distress and Performance Prediction Models for Concrete Pavements inTexas

摘要

The document presents the results of a study to develop and test distress andperformance prediction models for rigid pavements (continuously reinforced concrete, jointed reinforced concrete, and jointed plain concrete pavements) in Texas. These models were developed for the Texas Department of Transportation (TxDOT) for possible incorporation into their Texas Pavement Management Information System (PMIS). Data for testing the models were obtained from databases maintained by TxDOT and the Center for Transportation Research (CTR) at The University of Texas at Austin. The database maintained by TxDOT is part of the Department's Pavement Evaluation System (PES). Additional maintenance and rehabilitation (M&R) data were obtained from TxDOT district offices. The modeling process consisted of first identifying the prevalent distress manifestations for rigid pavements in Texas. The available data sources were then studied to determine whether data were available to test models for the prevalent distress manifestations identified. Condition data from the PES and CTR databases were analyzed using the statistical analysis software, SAS. Scatter charts of distress levels versus pavement age were plotted to identify any trends in distress level with pavement age. Distress data from the CTR database for non-overlaid CRCP sections displayed little variance and a reasonable trend with pavement age. Hence the prediction models developed using these data are reliable and robust. The data available for asphalt-overlaid CRCP and JCP sections, and for non-overlaid JCP sections from the CTR and PES database, were sparse and less detailed. Except for the non-overlaid JCP data, the remaining data showed no definite correlation between distress level and pavement age. Therefore, the models developed for overlaid CRCP and JCP sections, and for non-overlaid JCP sections, are less reliable.