INVESTIGATION OF CBR-VALUES OF GRANULAR SUB BASE IN VARIOUS DEGREE OF SATURATION (DOS)

Authors

  • Md Tofail Miah School of Engineering and Built Environment, Griffith University, Australia
  • Erwin Oh School of Engineering and Built Environment, Griffith University, Australia

Keywords:

Granular Sub Base, California Bearing Ratio (CBR), , Degree of Saturation (DOS), Bearing Capacity, Moisture Damage

Abstract

The impact of the Degree of Saturation (DOS) on granular Sub Base material was investigated
in this study. Seven numbers of CBR (California Bearing Ratio) samples of granular Sub Base material were
fabricated at 95% compaction according to Standard Australian, AS 1289.6.1.1. These samples were
prepared against the targeted moisture variation between DOS 50% and 70%. In particular, the CBR samples
were prepared in the laboratory through proper gradation with optimum moisture content (OMC) and
appropriate mechanical compaction. Afterward, the samples were dried back and further soaked to achieve
the target DOS. CBR tests were executed to assess the variations in strength and interpret the effect of DOS.
The results demonstrated that the bearing capacity of granular Sub Base escalated gradually with the increase
of DOS until it reached DOS of 56%, which was corresponding to OMC. Conversely, the bearing capacity
declined substantially with the further increment of DOS. The study elaborated that the bearing capacity of
Sub Base material can be decreased with the increase of moisture content beyond the OMC level and could
also diminish pavement performance, including durability, and lead to moisture-related damage to the
flexible pavement.

Downloads

Published

2021-01-29

How to Cite

Md Tofail Miah, & Erwin Oh. (2021). INVESTIGATION OF CBR-VALUES OF GRANULAR SUB BASE IN VARIOUS DEGREE OF SATURATION (DOS). GEOMATE Journal, 20(77), 98–106. Retrieved from https://geomatejournal.com/geomate/article/view/332

Most read articles by the same author(s)

1 2 > >>