Evaluation of Portland Cement for Full Depth Reclamation (FDR) in Terms of Structural Capacity and Opening Time to Traffic

Cement Council of Texas – funded project 2025

Full Depth Reclamation (FDR) is a proven, cost-effective, and environmentally sound process that recycles the existing asphalt and base material to rebuild roads. Cement stabilization of FDR significantly improves the strength and longevity of the pulverized layers. In Texas, however, the generally accepted practice requires a 7-day cure time before opening the stabilized base to construction or traffic. While effective, the wait time generally means delays in project delivery and increased construction costs.

This research project explores laboratory-produced specimens of cement-stabilized FDR subjected to different curing periods to reduce the waiting period while maintaining high performance. With the X-Ray Diffraction (XRD) analysis incorporated, the study contrasts the chemical and mineralogical phases of hydration of the given curing time. The study develops an understanding of the effect of shortened curing periods on pavement structure strength and endurance of pavement layers. The outcome of this project is intended to enable expedited and economical construction practices, without compromising roadway safety or long-term pavement performance. This research promotes the development of new, sustainable strategies for enhancing infrastructure delivery and cost-effectiveness in Texas and beyond.