2) The results of a very comprehensive drained triaxial testing program performed in Sacramento River sands are summarized in the following figure. a) Briefly explain how the data points were obtained and how many tests were conducted. b) Given those results, plot the critical state line (CSL) of the soil. Plot it both in linear and semi-logarithmic scales. Hint: By definition, the critical void ratio is the void ratio at failure when the volumetric strain is zero. Relative density, D. (%) 80 60 100 40 20 00 0.1 02 0.3 0.6 O 1.0 Volumetric strain at failure, AVV. (%) -5 1.3 All specimens: Sacramento River sand 2.0 10 2.9 Sc (MPa) 3.9 -15 0.5 0.6 0.9 1.0 0.7 0.8 Void ratio at end of consolidation, ee 2) The results of a very comprehensive drained triaxial testing program performed in Sacramento River sands are summarized in the following figure. a) Briefly explain how the data points were obtained and how many tests were conducted. b) Given those results, plot the critical state line (CSL) of the soil. Plot it both in linear and semi-logarithmic scales. Hint: By definition, the critical void ratio is the void ratio at failure when the volumetric strain is zero. Relative density, D. (%) 80 60 100 40 20 00 0.1 02 0.3 0.6 O 1.0 Volumetric strain at failure, AVV. (%) -5 1.3 All specimens: Sacramento River sand 2.0 10 2.9 Sc (MPa) 3.9 -15 0.5 0.6 0.9 1.0 0.7 0.8 Void ratio at end of consolidation, ee