Test set-up to determine quality of tack coat
Based on the lessons learned, a device that measures only the quality of tack and is independent of the surface tested was developed. The developed device “UTEP Pull-off Device” measures quality of tack coat in tension mode rather than shear mode; therefore, is independent of tested surface. The developed device is simple, reliable, economical, and could determine the quality of the tack coat in less than 15 minutes. The evaluation of the device in the parking lot as well as in the laboratory identified that the device can consistently identify the quality of tested tack coat. Since the strength of the tack coat is dependent on the set time and test temperature, a test system is proposed that can be used to develop relationship in the laboratory. The developed relationship can then be used in the field to identify adequacy of the tack coat. Preliminary field evaluations indicated that the device has the capability of identifying the quality of the tack coat. The developed device is simple, reliable, economical, and could determine the quality of the tack coat in less than 45 minutes. The major outcome of this project is the UTEP Pull-off Device that can be used for evaluation of tack coat in the field. The new setup not only will improve the quality of bond between the two layers, it will also assist TxDOT in extending the life of the rehabilitated pavement. (Abstract shortened by UMI.)
Deysarkar, Indranil, "Test set-up to determine quality of tack coat" (2004). ETD Collection for University of Texas, El Paso. AAI1423697.