AZA 0853 LIQUID LIMIT DEVICE WITH COUNTER

Category:

Description

IS 2720 (PART V), BS 1377-2 , ASTM D 4318
Specification:
Casagrande method in mechanical form is known as liquid limit method and has been in use for soil mechanics for a
number of decades. The liquid limit data of soils is useful to correlate mechanical properties of soil, such as
compressibility and lower shear strength. Liquid limit is the water content at which soil passes from zero strength to an
infinite strength, hence the true value of liquid limit cannot be determined.
For determination purpose liquid limit is that water content at which a part
of soil, cut by a groove of standard dimensions, will flow together for a
distance of 1.25cm under an impact of 25 blows in a standard liquid limit
apparatus. The soil at the water content has some strength which is about
0.17N/cm. sq. (17gms/sq.cm.) . At this water content soil just passes
from liquid state to plastic state.
It consists on a brass cup held on an adjustable bracket.
The cup can be adjusted for a fall of 1 cm and can be raised an dropped
on a rubber base of standard hardness by cam action. Complete with one
Casagrande grooving tool, one ASTM grooving tool and a height gauge
block. A counter to register the number of blows.