Surrogate models to predict maximum dry unit weight, optimum moisture content and California bearing ratio form grain size distribution curve

Saif Alzabeebee *, Safaa A. Mohamad, Rwayda Kh.S. Al Hamd

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

This study evaluates the applicability of using a robust, novel, data-driven method in proposing surrogate models to predict the maximum dry unit weight, optimum moisture content, and California bearing ratio of coarse-grained soils using only the results of the grain size distribution analysis. The data-driven analysis has been conducted using evolutionary polynomial regression analysis (MOGA-EPR), employing a comprehensive database. The database included the particle diameter corresponding to a percentage of the passing of 10%, 30%, 50%, and 60%, coefficient of uniformity, coefficient of curvature, dry unit weight, optimum moisture content, and California bearing ratio. The statistical assessment results illustrated that the MOGA-EPR provides robust models to predict the maximum dry unit weight, optimum moisture content, and California bearing ratio. The new models’ performance has also been compared with the empirical models proposed by different researchers. It was found from the comparisons that the new models provide enhanced accuracy in predictions as these models scored lower mean absolute error and root mean square error, mean values closer to one, and higher a20−index and coefficient of correlation. Therefore, the new models can be used to ensure more optimised and robust design calculations.
Original languageEnglish
Number of pages18
JournalRoad Materials and Pavement Design
Early online date5 Nov 2021
DOIs
Publication statusE-pub ahead of print - 5 Nov 2021

Keywords

  • Maximum dry unit weight
  • Optimum moisture content
  • California bearing ratio
  • Evolutionary computing
  • Gain size distribution

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