Field Evaluation of Full-Depth Reclamation Base Stabilization Using Proprietary Additives

Abstract: Base stabilization plays an important role for enhancing the structural integrity of road foundations by improving essential engineering properties such as shear strength, durability, fatigue resistance, and the stiffness or modulus of the base aggregate layer. By addressing challenges associated with weak or problematic soils, base stabilization significantly extends the lifespan and performance of road foundations, ensuring they can withstand the dynamic forces from vehicular traffic and environmental stresses. A field investigation and construction project were conducted on CSAH-14 in Wright County, Minnesota, to demonstrate the effectiveness of using various proprietary additives with a Full-Depth Reclamation (FDR) base layer. Five test sections were constructed in 2021, four of which were stabilized using additives, while one served as a control. The proprietary additives used in the research included Base One, Claycrete, EMC SQUARED, and Roadbond EN1. The Falling Weight Deflectometer (FWD) tests were conducted on the test sections at different times to capture the long-term performance of the stabilized FDR base. The objective of this study is to evaluate and compare the structural performance of the test sections constructed with proprietary additives. FWD tests were conducted in June 2021, November 2021, April 2022, June 2022, and June 2023 and October 2024. Falling Weight Deflectometer Deflection basin parameters (i.e., Maximum Deflection, Surface Curvature Index, Base Curvature Index, Area Under Pavement Profile and Deflection of the sensor at 60-in. offset) and Granular Equivalency (GE) number will be used for the pavement structural condition assessment.