Page 55 - HIGHWAY ENGINEERING LABORATORY_FLIP BUILDER

Page :
WORK INSTRUCTION
Edition :
Checking No.
DUCTILITY TEST OF BITUMEN
(Reference Standard: Effective Date:
CIVIL ENGINEERING BS EN 13589)
JKA/ DCC30112/ 2021 Amendment Date:

1.0 OBJECTIVE OF EXPERIMENT :

1. To measure the ductility of a given sample of bitumen

2. To determine the suitability of bitumen for its use in road construction

2.0 SUMMARY OF THEORY :
The Ductility Test of Bitumen is one of the important tests of bitumen which is essential

before using it in road construction. The Ductility Test of Bitumen used to measure the
adhesive and elastic properties of any bitumen sample.

The bituminous binder used in the pavement should be ductile enough to take up the
deformations acting upon it without exceeding the deflection limit. Ductile bitumen can

form a thin ductile film around the aggregate particles. Thus, it does not crack at low
temperatures. However, the films of brittle bitumen are not ductile and crack may easily
develop in lower temperatures.

Ductility: It is the property of a material by virtue of which a material is able to undergo

plastic deformation when pull force is applied without rupture or breaking.

Ductility of Bitumen: The amount in centimeter by which the bitumen can stretch before
breaking is called ductility of bitumen.

.

Ductility Test of Bitumen

Grade of Bitumen: There are five grades of bitumen on the basis of penetration value.
They are demonstrated as S-35, S-45, S-55, S-65, S-90, and S-200.

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