Join 60,000+ competitive exam aspirants
or with email
Your Cart
SubtotalтВ╣0
TotalтВ╣0
Examoogle тАв User тАв info@examoogle.com тАв EE-2024-8821
Chapter 1 of 12 тАв Page 1 of 248ЁЯФТ Protected PDF тАв Watermarked
Join 60,000+ competitive exam aspirants
When soil is at liquid limit, liquidity index =...........
0
1
infinity
none of these
1
The Liquidity Index (ILтАЛ) is a consistency index used to define the state of cohesive soil relative to its liquid limit (LL) and plastic limit (PL). When the natural water content (wnтАЛ) of the soil is equal to its liquid limit (LL), the liquidity index becomes exactly 1.
The Liquidity Index (ILтАЛ) is a consistency index used to define the state of cohesive soil relative to its liquid limit (LL) and plastic limit (PL). When the natural water content (wnтАЛ) of the soil is equal to its liquid limit (LL), the liquidity index becomes exactly 1.
ILтАЛ=LLтИТPLwnтАЛтИТPLтАЛ тАФ Definition of Liquidity Index
ILтАЛ=1 when wnтАЛ=LL тАФ Condition at Liquid Limit
The liquidity index is defined as ILтАЛ=IPwnтАЛтИТPLтАЛ, where IP is the plasticity index (LLтИТPL). By substituting wnтАЛ=LL into the equation, we get ILтАЛ=LLтИТPLLLтИТPLтАЛ=1. This signifies that the soil is in a liquid state, possessing high sensitivity and low shear strength.
If ILтАЛ<0, soil is in a semi-solid or solid state.
If 0<ILтАЛ<1, soil is in a plastic state.
If ILтАЛ>1, soil behaves as a liquid (viscous fluid).
Liquidity index helps in assessing the consistency and sensitivity of fine-grained soils.
Provides a quantitative measure of soil consistency.
Essential for evaluating the shear strength characteristics of clayey soils.
Foundation engineering for settlement prediction.
Assessment of soil sensitivity and remolding potential.
At the plastic limit (wnтАЛ=PL), the liquidity index ILтАЛ is 0.
Option A (0) corresponds to the Plastic Limit.
Option B (1) correctly corresponds to the Liquid Limit.
B is correct тАФ At the liquid limit, the water content equals the liquid limit, which mathematically results in a liquidity index of 1.
Always remember that ILтАЛ=0 at the Plastic Limit and ILтАЛ=1 at the Liquid Limit; these are standard benchmarks for soil consistency evaluation.