Sands
Click on specimen tube


Specimen Tube
Click on green sand to pour into the specimen tube


Green Sand
Click on sand rammer


Sand Rammer
Click on sand filled specimen tube to place it at the sand rammer


Sand filled specimen Tube
Click on ramming cam to perform ramming operation 3 times


Ramming Cam
Click on prepared specimen for parameters


Prepared Specimen
Click on permeability meter


Permeability Meter
Click on OPD valve to set at 'D' position


OPD Valve
Click on water to pour in the tank


Water
Click on OPD valve to set at 'O' position


OPD Valve
Click on manometer to get initial reading


Manometer
Click on standard specimen tube to place it in the inverted position on the rubber boss


Standard Specimen Tube
Click on OPD valve to set at 'P' position


OPD Valve
Click on stop watch to record the time for the air tank to reach at 0 mark


Stop Watch
Click on manometer to get final reading


Manometer
Click on permeability meter


Permeability Meter
Click on Result to get the Observations and Calculation

Observations and Calculation

Type of specimen

Manometer reading (in g/cm2)

Time in minutes

Permeability Number
Sand

Initial reading, Pi

Final reading, Pf

Difference, P

Time, T

Indicated

Calculated

Green sand

0.6

6.9

6.3

0.917

93

86.77



Volume of air passed, V = 2000 cm3
Height, h = 50.8 mm = 5.08 cm
Diameter, d = 50.8 mm = 5.08 cm
Area of specimen tube, A = πd2/4

Specimen Tube

Sand

Sand Rammer

Permeability Meter