LL (%) = 43.202 e-0.015HL (1)
The best relationship between plasticity index (PI) and used hydrated
lime content, as compared to the plastic limit (PL) and used hydrated
lime content can be seen in Figure 4 in the form of polynomial equations
with the coefficient of determination R2 equal to
0.8181 and 0.7204 respectively and the corresponding non-linear
equations as follows: