Squeeze the pieces together, knead between the thumb and first finger of each hand, reform into an ellipsoidal mass, and re-roll.
During this rolling process, the end the soil thread shall not contact the side rail. Simultaneously apply a slight downward force and back and forth motion to the top plate so that the top plate comes into contact with the side rails within 2 min. Place the soil mass on the bottom plate at the midpoint between the slide rails.Place the top plate in contact with the soil mass. Fig.5:performing plastic limit test on soil sample Rolling Device Method: attach smooth unglazed paper to both the top and bottom plates of the plastic limit-rolling device.
