Full Depth Reclamation (FDR) involves sampling existing road materials, evaluating the materials in a lab mix design, and compacting an asphalt emulsion stabilized reclaimed mix to fully reconstruct the road. The document outlines the FDR mix design process including sampling, material evaluation, designing asphalt emulsion contents, specimen fabrication, curing, and performance testing to determine structural properties for reconstruction. Quality control during construction and several constructed FDR projects using this design process are also summarized.

1. Full Depth Reclamation (FDR) Engineered Mix Design with Asphalt Emulsion

12. FDR and GBS Tests Tests run on 150-mm SGC prepared specimens Thermal Cracking Resistance Indirect Tensile Test (IDT) AASHTO TP 9 Relative indicator of quality. Strain or deflection w/ applied load for structural design. Resilient Modulus ASTM D4123 Reliability Construction & QA/QC Requirements Moisture resistance Retained Strength ASTM D4867 Strength Indirect Tensile Strength (ITS) ASTM D4867 Curing Short-Term Strength Cohesiometer ASTM D1560 Performance Parameter Test

13. Basic Specifications* *To be adjusted based on region Project dependent Project dependent Thermal cracking 120,000 150,000 Res. Mod., psi 20 25 Retained ITS, psi 35 40 ITS, psi 150 175 Short-term strength, g/in. P200 > 8% P200 < 8%

14. Texas Emulsion FDR Specifications Report Seismic modulus, appendix Report Resilient modulus, T307 80% Retained UCS 150 UCS, Tex-117-E, psi Report Dielectric value, appendix 50 ITS, Tex-226-F, psi Required Test

23. STS by Cohesiometer Cohesiometer measures early strength; tested after 1 hour cure Load applied Stress on sample Shot in cylinder Great indicator of emulsion curing, in-place early strength, and ability to carry traffic.

31. FDR Mix Design SemMaterials, L.P.