Table 7.

Responses of clay samples treated with various sand parameters and their optimal solutions.

Number	Clay	Sand	MDD	Cc	Cs	Cohesion	Phi	Desirability
1	71.482	30.000	1.730	0.136	0.027	43.774	9.000	0.967	Selected
2	72.039	30.000	1.728	0.137	0.027	43.221	9.237	0.956
3	71.506	28.533	1.733	0.136	0.027	43.443	9.000	0.954
4	74.771	30.000	1.717	0.139	0.030	40.505	10.402	0.898