| Liquid,
Plastic, Shrinkage, Limits |
| The
behavior of soil is related to the amount of water in its structure. The
boundaries in a soil's condition are called limits. The liquid limit is
the water content at which the soil flows to close a standard groove when
jarred in a liquid limit device. The plastic limit is the water content
at which the soil begins to crumble when rolled into threads of 3mm diameter.
The shrinkage limit is the water content just sufficient to fill the pores
when the soil is at minimum dried volume. |
| Liquid
Limit Device |
| In
order to provide details for preparation stratiographical profiles from
bore log data and for classification purposes Liquid Limits of representative
soil samples are determined. As an inferential tests, the liquid limit data
of soils enables soil engineers to correlate with mechanical properties
of soils such as lower limit of shear strength and compressibility index
of soils. |
| Model
No. |
Description
(Sizes) |
Display |
| I
30 |
LIQUID
LIMIT DEVICE (Hand Operated):IS 2720 (V) & 9259
The Liquid limit device consists of a hard rubber base carrying a sliding
carriage assembly to which a brass cup is hinged The cup is raised and
allowed to fall through a height of 1 cm by the help of a lead screw provided
at the back of the sliding carriage. For ease of operation, the handle
for rotating the cam has been provided on the right hand.
Complete with casagranda grooving tool and gauge block
|
|
| I
30.1 |
LIQUID
LIMIT DEVICE WITH COUNTER
Same as above but provided with a revolution counter which helps eliminate
error in counting the number of blows and permits better attention to
the observation of closing of the groove.
|
|
| I
30.2 |
LIQUID
LIMIT DEVICE WITH COUNTER AND MOTOR
Same as above but operated by a motor geared down to give approximately
120 r.p.m. suitable for operation on 220volts.
Single phase. Complete with casagranda grooving tool and gauge block.
|
|
| I
30.3 |
CONE
PENTROMETER
For determining the liquid limit of soils, this
is specially useful for obtaining reliable and accurate results for those
soils which have low plasticity index. The percentage moisture contents
determined when a cone with half angle of 10 deg.30 deg. under a total
sliding weight of 148gm penetrates 25mm give the liquid limit. As an inferential
test empirical correlations have been developed to asses the shear strength
of soils at liquid limit.
It consists of:
A stand over which a bracket carrying a moveable bearing rod with arrangement
to clamp the bracket and the moveable rod at any desired position. A scale
is provided to indicate the depth of penetration.
1.Cone; 2. Trough 50mm internal dia X 50mm high.
|
|
| Shrinkage
and Plastic Limit |
| This
apparatus is intended for obtaining the data from which the following soil
characteristics may be calculated : Shrinkage ratio; Shrinkage limit (removable
soil) Shrinkage limit (Undisturbed soil);Shrinkage ratio; Shrink-age index
and volumetric shrinkage of soils. |
| Model
No. |
Description
(Sizes) |
| I
31 |
SHRINKAGE
LIMIT SET :IS 2720 (VII); BS 1377; ASTM D427
It consists of Porcelain Evaporating dish, spatula,
shrink- age dish, steel straight edge, glass cup, Perspex plate with three
metal prongs, Graduated glass cylinder of 25ml capacity X 0.5ml, Mercury
500 gms |
|
| I
31.1 |
PLASTIC
LIMIT TEST APPARATUS:IS 2720 (V)
It consists of a porcelain dish 12 cm dia., spatula
8cm longX2cm long 2 no.
Ground glass plate 20 X 15cm X 6 mm , Containers 6 nos., Brass rod 3mmX10
cm Long.
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