Triaxial compression tests were run on specimens from a large undisturbed block sample of...

Triaxial compression tests were run on specimens from a large undisturbed block sample of clay. Data are given below. Tests 1 through 4 were run so slowly that complete drainage may be assumed. In tests 5 through 8, no drainage was permitted. Plot the Mohr failure envelopes for this soil. Determine the Mohr-Coulomb strength parameters in terms of both total and effective stresses. (After Taylor. 1948.)

What can you say about the probable in vim OPR and Kn of this clay? Is it possible to estimate the En and Tf of this soil?