Laboratory Investigation of Cement Treated Bases (CTB) and Full-Depth Reclamation (FDR) Mixes.

EasyChair Preprint 10574

Abstract

This study focuses on advancements in road construction technology that reduce aggregate usage, leading to cost savings and energy conservation. It proposes a new method for determining cement and fly ash percentages in stabilizing the base course. The use of Full Depth Reclamation (FDR) with chemical stabilizers enhances strength, reduces water permeability, and increases flexibility. The study examines compaction, durability, and unconfined compressive strength (UCS) with different cement percentages and stabilizers in FDR. UCS increases with varying cement percentages in CTB but decreases with higher fly ash content and stabilizers in FDR. Durability tests show 5.80% mass loss in wetting-drying cycles of CTB. Utilizing CTB as a base layer in flexible pavement construction improves cost-effectiveness, durability, and pavement strength. However, a thicker wearing course is required to prevent rutting and cracking. CTB implementation results in cost reductions of 24.48% for high-volume roads and 34.20% for low-volume roads, while incorporating FDR further reduces costs by 30.06% for low-volume roads as compared to conventional method. In summary, this study explores advancements in road construction technology and highlights the benefits of CTB in flexible pavement construction. The findings emphasize the importance of thickness and demonstrate cost savings through CTB implementation and FDR application.

Keyphrases: Cement treated bases (CTB), Durability, Flexible pavement, Full-depth Reclamation (FDR), Unconfined Compressive Strength (UCS)

@booklet{EasyChair:10574,
  author    = {Rohan Kumar and Tanuj Chopra and Rajesh Pathak},
  title     = {Laboratory Investigation of Cement Treated Bases (CTB) and Full-Depth Reclamation (FDR) Mixes.},
  howpublished = {EasyChair Preprint 10574},
  year      = {EasyChair, 2023}}