Variability Of As-constructed Properties Of HMA And Their Relation To Pay Factors And Rutting Resistance: A Case Study

Abstract

During the last decade, Texas has under gone a huge reconstruction of its major and strategic highways in order to improve transportation and prepare for future population and traffic growth. The population is estimated to increase by 50% for 2035 for the North Texas Area.Some of those highway reconstruction projects have asphalt pavements, and they utilize significant quantities of asphalt concrete. This study compiles the test results of As-Constructed properties for asphalt mixes for four different projects built in Texas. This data was statistically analyzed to obtain information on the variability of As-Constructed properties and study the effect of the current TxDOT specification requirement related payment factor. In addition, the analysis of the relation between rutting and As-Constructed HMA properties was studied.