Question

A soil sample has passing 0.075 mm sieve = 60% liquid limit = 65% and plastic limit = 40%. The group index of the soil, is

Answer 1

Answer:

I think 40 is the answer

Answer 2

Answer:

GI = 0.2a + 0.005ac + 0.01bd.

a = P - 35 = 60 - 35 = 35.

b = P - 15 = 60 - 15 = 45.

c = LL - 40 = 65 - 40 = 25.

d = PL - 10 = 40 - 10 = 30.

GI = (0.2 * 35) + (0.05 * 35 * 25) + (0.01 * 45 * 30) = 24.875.