1. Significant Work. Extraordinary People. SRA. CC6 Distress Mapping Pavement Working Group 2012 SRA International Federal Aviation Administration April 24 – 26, 2012 By: Josh Davis

2. 2 Significant Work. Extraordinary People. SRA. Outline CC6 Pavement Design SOW Objectives Trafficking Plan Distress Mapping SCI Evaluation NDT Imaging Survey Conclusions Questions

3. 3 Significant Work. Extraordinary People. SRA. CC6 Pavement Design P-403 Base Course P-154 Subbase Course Reworked Subgrade P-306 Econocrete Base P-501 Concrete Pavement

4. 4 Significant Work. Extraordinary People. SRA. SOW Objectives Primary – Effect of flexural strength on structural life Secondary –Effect of modulus of elasticity on structural life –Compare econocrete and HMA stabilized base –Compare thickened edge and reinforced isolation joint –Grooving research –PSPA standard for rigid pavements –GPR Assessment –Compaction requirements under rigid pavements

5. 5 Significant Work. Extraordinary People. SRA. Test Plan

7. 8-15-2011 8-25-20119-08-20119-21-20119-26-2011 10-07-201110-25-2011 11-01-2011

8. 8 Significant Work. Extraordinary People. SRA. SCI Evaluation Structural Condition Index (SCI) is a numerical value assigned to a pavement based on the structural distresses observed through visual surveys. The SCI scale is 0 – 100. For CC6, SCI values were calculated for each test item. End of design life is valued at 80. Testing parameters dictate testing well beyond the end of design life.

9. 9 Significant Work. Extraordinary People. SRA. NDT Imaging Survey Capable of fast documentation of visible distresses Reduces time needed on runways/taxiways System cost and maintenance cost Massive data storage requirements Max. 1mm resolution

10. 10 Significant Work. Extraordinary People. SRA. Conclusions CC6 was designed to research the effects of flexural strength and modulus strength of concrete pavements for airport design Four of the SOW objectives could be partially achieved by visual survey Documentation of the visual survey provides a time history of distresses in relation to passes Visual distress surveys can be used for SCI evaluation Technology is allowing visual surveys to be conducted at “high speed” reducing down time of runways/taxiways

11. 11 Significant Work. Extraordinary People. SRA. Acknowledgements FAA Dr. Satish Agrawal Dr. Gordon Hayhoe Jeff Gagnon Al Larkin SRA Chuck Teubert Jerry Connelly Dr. Injun Song Jimmy Zargan Reni Aponte Henry Fermin

12. 12 Significant Work. Extraordinary People. SRA. Questions???