S.test#8 : Classification Of Soil

S.Test#8 : Classification of soils AASHTO M 145-91

This recommended practice describes a procedure  for classifying soils into seven groups based on lab determination of particle-size distribution. Liquid limit,plastic limit , and plasticity index evaluation of soils within each group index , should be useful in determining relative  quality of soil material for use in earthwork structure , subbase , subgrade or others .

S.test #5#6#7 Atterberg Limit : Liquid Limit - Plastic Limit - Plasticity Index

Atterberg limit contains 3 tests ( liquid limit , plastic limit , plasticity limit)

S.test #5 Determination of the Liquid limit of soil AASHTO T-89 (Atterberg limit)

This procedure covers the determination of the liquid limit of soil .It covers the change of soil from elasticity position to liquid position .

S.test#6: Plastic Limit AASHTO T - 90 (Atterberg Limit)

The plastic limit of a soil is the lowest water content at which soil remains plastic 

S.test#7 Plasticity index AASHTO T-91 (Atterberg limit)

The plasticity index of a soil is the numerical difference between the liquid limit and the plastic limit.It's the moisture content at which the soil is in a plastic state