Page 56 - HIGHWAY ENGINEERING LABORATORY_FLIP BUILDER

3.0 EQUIPMENT :

Ductility apparatus Briquette mold- 3 in no Thermometer Water Bath

Other accessory apparatus include: Knife, Heating oven and Beaker

4.0 MATERIALS:

1. Bitumen of known grade
2. Glycerine

3. Dextrin

3. 0 DETAILED PROCEDURE :

REFERENCE
WORK PROCESS DOCUMENT

The ductility test of bitumen is carried out in two steps:

Sample Preparation: In this step, the bitumen sample is filled in the
briquette mold after melting it.

Testing of the Specimen: In this step, the bitumen sample taken in the
mold is tested for its ductility in the ductility testing machine.

A. Sample Preparation:

1. Take the bitumen sample in a beaker and heat it to a temperature
of 75-100°C- above its approximate softening point. Allow the

bitumen to melt until it is converted completely into a liquid state.

2. Prepare a mixture of glycerine and dextrin in equal proportions. Mix
it well. Then coat the surface of the brass plate and the interior of
the sides of the briquette mold. This prevents the bitumen from

sticking to the mold.

Higway Engineering Laboratory page 43