Question

A sample of soil has liquid limit is 45% plastic limit is %25 shrinkage limit is 17% and natural moisture content is 30% the consistancy index of soil is

Answer 1

Answer:

15/20

Explanation:

plasticity index= liquid limit - plastic limit

IP = 45-25 = 20

consistency index

= liquid limit - natural water content / IP

= 45-30/20

=15/20.

Answer 2

The consistency index of soil is $\frac{3}{4}$

Given:

Liquid limit of soil = 45%

Plastic limit of soil = 25%

Shrinkage limit of soil = 17%

Natural moisture content = 30%

To find:

consistency index of soil

Explanation:

plasticity index = (liquid limit - plastic limit)

IP = 45 - 25

   = 20

consistency index

= liquid limit - (natural water content / IP)

= 45 - $\frac{30}{20}$

= $\frac{15}{20}$

= $\frac{3}{4}$