Performance of Preventive Maintenance Treatments for Flexible Pavements in Texas

This report documents the work performed in the first year of the Texas Department of Transportation (TxDOT) Project 0-6878. The main objective of this project is to quantify the effectiveness of various popular preventive maintenance (PM) treatments under varying conditions toward optimizing their design and application. The work conducted in the first year is divided into two main parts. The first part consists of an evaluation of the effectiveness of different PM treatments through a model-based approach using pavement sections included in the Specific Pavement Study (SPS)-3 experiment of the Federal Highway Administration (FHWA) Long-Term Pavement Performance (LTPP) program. For this analysis, the effectiveness of the different PM treatments was assessed and ranked using statistical analysis and modelling of the performance response of a set of treated and non-treated (control) pavement sections. The proposed model aimed to explain the relationship between the loss in serviceability rate as a function of treatment type along with pavement, traffic, climate conditions, and their interaction with the PM treatment effectiveness. The second part estimates the effective life of PM treatments of in-service flexible pavements located throughout Texas through the statistical analysis and modelling of TxDOT databases that include more than twenty years of relevant design, construction, and performance data of maintenance and rehabilitation (M&R) works. The preliminary analysis focused on the three most popular PM treatment types: chip seals, microsurfacing, and thin overlays. The effective life of these treatments is estimated using survival analysis techniques as a function of the underlying pavement characteristics and external influences with regard to traffic and climate.


  • English

Media Info

  • Media Type: Digital/other
  • Edition: Technical Report
  • Features: Figures; Maps; Photos; References; Tables;
  • Pagination: 40p

Subject/Index Terms

Filing Info

  • Accession Number: 01634921
  • Record Type: Publication
  • Report/Paper Numbers: FHWA/TX-16/0-6878-2, Report No. 0-6878-2
  • Contract Numbers: 0-6878
  • Created Date: May 17 2017 5:37PM