Co-Relationship between California Bearing Ratio and Index Properties of Jamshoro Soil

  • Faisal Iqbal Department of Civil Engineering, Mehran University of Engineering and Technology, Jamshoro
  • Aneel Kumar Department of Civil Engineering, Mehran University of Engineering and Technology, Jamshoro
  • Ali Murtaza Department of Civil Engineering, Mehran University of Engineering and Technology, Jamshoro

Abstract

Subgrade is a most important part of a pavement structure, which should have a reasonable stiffness modulus and shear strength. CBR (California Bearing Ratio) test is performed to evaluate stiffness modulus and shear strength of subgrade soils. However, CBR test is laborious and time consuming, particularly when soil is highly plastic like Jamshoro soil. In order to overcome this limitation, it may be appropriate to correlate CBR value of soil with its index properties like grain size analysis, Atterberg limits, and compaction characteristics such as MDD (Maximum Dry Density) and OMC (Optimum Moisture Content). This paper expresses the correlations between CBR value of Jamshoro soil and its index properties. SLRA (Single Linear Regression Analysis) and MLRA(Multiple Linear Regression) based Models were utilized. It is seen that MLRA gave better correlations up to R2 of about 0.984. It is observed that the Soaked CBR value can be predicted with confidence from LL (Liquid Limit), PI (Plasticity Index) and percent finer while the un-soaked CBR value can be obtained from LL, plasticity index and MDD.

Published
Jan 1, 2018
How to Cite
IQBAL, Faisal; KUMAR, Aneel; MURTAZA, Ali. Co-Relationship between California Bearing Ratio and Index Properties of Jamshoro Soil. Mehran University Research Journal of Engineering and Technology, [S.l.], v. 37, n. 1, p. 14, jan. 2018. ISSN 2413-7219. Available at: <http://www.publications.muet.edu.pk/index.php/muetrj/article/view/121>. Date accessed: 20 aug. 2018. doi: http://dx.doi.org/10.22581/muet1982.1801.16.
This is an open Access Article published by Mehran University of Engineering and Technolgy, Jamshoro under CCBY 4.0 International License