Atterberg Limits

Question 1

The moisture content at the point of transition from plastic to liquid state

Answer 1

Liquid Limit

Question 2

ASTM D 4318

Answer 2

Standard Test Methods for Liquid Limit, Plastic Limit, and Plasticity Index of Soils

Question 3

The moisture content in percent, the soil crumbles when rolled into threads 3.2 mm or 1/8 in diameter

Answer 3

Plastic Limit

Question 4

The moisture content in percent, at which the volume of the soil mass ceases to change

Answer 4

Shrinkage Limir

Question 5

the difference between the liquid limit and the plastic limit of soil

Answer 5

Plasticity Index

Question 6

defines the relative consistency of a cohesive soil in the natural state

Answer 6

Liquidity Index

Question 7

the numerical difference between the plastic limit and shrinkage limit of the remolded soil

Answer 7

Shrinkage Index

Question 8

a valuable parameter for classifying the predominant minerals in the sediment

Answer 8

Activity of Clay

Question 9

the ratio of a given volume change expressed as a percentage of dry volume to the corresponding charge
in water content above the shrinkage limit expressed as a percentage of the weight of the oven-dried soil.

Answer 9

Shrinkage Ratio

Question 10

an indicator of the relative shear strength. As CI increases, the firmness, or shear strength of the soil
also increases

Answer 10

Consistency Index

Question 11

the slope of the water content versus log10 of the blows number plot for the Casagrande cup method, is the
measure of the rate at which soil mass loses its shear strength with increased water content.

Answer 11

Flow Index