The performance of Cement Treated Permeable Base (CTPB) material under full-scale aircraft traffic will be investigated on a dedicated test item during Construction Cycle 9 (CC9) at the FAA’s National Airport Pavement Test Facility. Laboratory and field characterization of the CTPB material were performed during CC9 construction. In addition to testing for compressive and flexural strength, the feasibility of measuring resilient modulus on 28-day cured CTPB cylindrical specimens was investigated as part of the laboratory characterization. Producing specimens of flat and smooth end surfaces was one of the major challenges in measuring reliable vertical deformations during laboratory triaxial testing. The stress-dependency of CTPB material was captured in the resilient modulus test results. The Light Weight Deflectometer (LWD) test was identified as a feasible alternative for field characterization on the finished CTPB surface. The CTPB modulus measured in the laboratory was 2 to 3 times the field modulus from LWD testing. This paper discusses laboratory and field characterization results, and provides an overall evaluation of CTPB material properties and anticipated performance under full-scale traffic. The implications of test results for future CTPB material FAA specifications are addressed.

Access the Conference Proceedings Paper on ASCE Library 

The performance of Cement Treated Permeable Base (CTPB) material under full-scale aircraft traffic will be investigated on a dedicated test item during Construction Cycle 9 (CC9) at the FAA’s National Airport Pavement Test Facility. Laboratory and field characterization of the CTPB material were performed during CC9 construction. In addition to testing for compressive and flexural strength, the feasibility of measuring resilient modulus on 28-day cured CTPB cylindrical specimens was investigated as part of the laboratory characterization. Producing specimens of flat and smooth end surfaces was one of the major challenges in measuring reliable vertical deformations during laboratory triaxial testing. The stress-dependency of CTPB material was captured in the resilient modulus test results. The Light Weight Deflectometer (LWD) test was identified as a feasible alternative for field characterization on the finished CTPB surface. The CTPB modulus measured in the laboratory was 2 to 3 times the field modulus from LWD testing. This paper discusses laboratory and field characterization results, and provides an overall evaluation of CTPB material properties and anticipated performance under full-scale traffic. The implications of test results for future CTPB material FAA specifications are addressed.

**[Access the Conference Proceedings Paper on ASCE Library](https://ascelibrary.org/doi/10.1061/9780784483527.010)** 

Field and Laboratory Characterization of Cement Treated Permeable Base for Flexible Airport Pavement at the FAA’s National Airport Pavement Test Facility

Welcome to the International Airfield and Highway Pavements Conference of the Transportation & Development Institute (T&DI) of ASCE. This international conference will provide an unrivaled chance to interact and exchange information with worldwide leaders in the fields of highway and airport pavements, as well as airport safety technologies.

This conference will bring together designers, project/construction managers, academics, and contractors from around the world to discuss the state-of-the-art implementation, construction, design, in airfield and highway pavements.

Paper Proceedings: https://doi.org/10.1061/9780784483527 | https://doi.org/10.1061/9780784483503 | https://doi.org/10.1061/9780784483510

Conference DOI: https://doi.org/10.26226/m.63284d15cb3e8e0012755dd4