Page 41 - HIGHWAY ENGINEERING LABORATORY_FLIP BUILDER

REFERENCE
WORK PROCESS
DOCUMENT
5. The crushed test sample and weight them. Determine the mass
of the crushed sample (M1).
6. Sieve the whole of the sample in the tray on the 2.36 mm BS test

sieve until no further significant amount passes in 3 minutes.
Weight the fractions passing (M2) and retained (M3) on the
sieve to an accuracy of 0.1 g. And if total mass M2 + M3 is less
than the initial mass (M1) by more than 1g, discard the result
and make a fresh test.

Penetration (mm)
Sample Mean
1 2 3 4 5 6 7

1

2

3

* Note : Unit PEN. = 0.1mm (80 PEN.=8 mm)

The difference of highest and lowest reading of penetration

Highest Lowest
Sample Penetration (mm) Penetration(mm) Difference (mm)

1

2
3

Higway Engineering Laboratory page 28