BITUMEN CONTENT

Updated: Jul 16, 2020

AIM

To determine the bitumen content as per ASTM 2172.

APPARATUS



CENTRIFUGE EXTRACTOR

i) Centrifuge extractor

ii) Miscellaneous - bowl, filter paper, balance and commercial

benzene

SAMPLE

Take 500 g sample.

PROCEDURE

i) If the mixture is not soft enough to separate with a trowel,

place 1000 g of it in a large pan and warm upto 100 °C to

separate the particles of the mixture uniformly.

ii) Place the sample (Weight ‘A’) in the centrifuge extractor.

Cover the sample with benzene, put the filter paper on it with

the cover plate tightly fitted on the bowl.

iii) Start the centrifuge extractor, revolving slowly and gradually

increase the speed until the solvent ceases to flow from the

outlet.

iv) Allow the centrifuge extractor to stop. Add 200 ml benzene

and repeat the procedure.

v) Repeat the procedure at least thrice, so that the extract is

clear and not darker than the light straw colour and record

the volume of total extract in the graduated vessel.

vi) Remove the filter paper from the bowl and dry in the oven at

110 + 5 °C. After 24 hrs., take the weight of the extracted

sample (Weight ‘B’).

REPORTING OF RESULTS




6 views0 comments

Recent Posts

See All