Chloride-Stabilized Roads Versus Thin Bituminous Surface: A Comparative Analysis

Given the increasing use of chloride stabilizers to improve the level of service and structural capacity of low-volume roads (LVRs), and the alternative to use thin bituminous surface (TBS) for these roads, this paper addresses a comparative analysis between both alternatives. The objective was to perform a comparative analysis of the characteristics of chloride-stabilized roads (CSR) and TBS roads in terms of serviceability and structural performance. To achieve this goal, road sections built with both alternatives were analyzed in the field and laboratory. In the field, CSR presented higher values and variability of international roughness index than TBS during the analyzed period. Overall surface performance presented values slightly lower for CSR than TBS, but with similar variability. In the laboratory, California bearing ratio (CBR) for unbound materials and CSR samples presented similar behavior. Costs per kilometer for TBS roads are 2.3 to 4.2 times higher than those for CSR, considering different alternatives of TBS with CSR structures built with magnesium chloride and sodium chloride. Given the outcomes of the study, the decision between CSR and TBS roads should be made considering the service conditions in terms of climate and traffic demand and expected level of service, considering that CSR could present more variability over time, but also a more cost-effective alternative compared to TBS for LVRs.

Language

  • English

Media Info

  • Media Type: Digital/other
  • Features: Figures; References; Tables;
  • Pagination: pp 17-29
  • Monograph Title: 12th International Conference on Low-Volume Roads
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 01732253
  • Record Type: Publication
  • Files: TRIS, TRB, ATRI
  • Created Date: Feb 27 2020 5:48PM