Field Evaluation of Tack Coat Quality Measurement Equipments

Texas Department of Transportation has recently experienced a number of pavement failures due to poor quality of tack coat. Various laboratory test setups have been developed to identify the quality of tack coat; however, there are no field test systems currently available to determine the quality of the tack coat. Hence, a field test set up is needed to determine the quality of the tack coat before beginning of paving operations and the objective of this study. In this study, three field test set ups that have potential to be applicable in the field were identified and evaluated. Two of the test set ups measured torque to estimate shear strength while the third used direct shear. The equipments were evaluated in the parking lot a two different times at three different set times, and at three dilution levels. Two emulsion types and one asphalt binder were used for the evaluation purposes. The preliminary parking lot test results and statistical analysis indicate that the two equipments are repeatable and are suitable for field applications. However, magnitude of the estimated strength is highly dependent on the equipment used. Therefore, further research is needed to identify the suitability of the devices for field applications. The selection of equipment, test results, and conclusions drawn are presented.

  • Availability:
  • Authors:
    • Tandon, Vivek
    • Deysarkar, Indranil
  • Publication Date: 2005-5

Language

  • English

Media Info

  • Media Type: Print
  • Features: Figures; References; Tables;
  • Pagination: pp 25-37
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 01006607
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Oct 24 2005 9:39AM