BICO Hand Driven Rotarex User Manual
Page 2
TEST
PROCEDURE
1.
Weigh out desired quantity of sample and distribute evenly and uniformly around the
bowl to avoid off
balance loading. This even distribution and a slow start will allow the material to disperse properly and minimize
excessive vibration from an unbalanced load.
2.
The filter ring should be placed between the bowl cover and bowl. The cover is clamped tightly to the
bowl by tightening the filler screw. A measured quantity of solvent is added
through the filler screw. Small
holes in the cover prevent the receptacle from becoming
air bound.
3.
START SLOWLY: In addition to reasons previously stated, this allows the solvent time to dissolve the
sample before maximum speed is attained and extraction occurs.
4.
MAINTAIN SPEED: For 15 seconds. This forces the solvent through the filter paper ring between the
bowl and cover.
5.
EXTRACTED SOLVENT: Is drained from the receptacle by gravity through the drain spout and into a
beaker or other container.
6.
REPEAT: For the prescribed number of solvent additions specified in the following
referenced
methods.
7.
CAUTION ON SOLVENTS: Although benzene is approved in the manual of test
methods, the use
of Triclor-ethylene is recommended.
REFERENCES
ASTM Test Method for Quantitative Extractions of Bitumen from Bituminous Paving Mixtures - Designation
D2171-72.
A.A.S.H.O. Part 2 - Tests for Highway Materials Designation
T164-70.
These official test methods should be consulted for detailed methods of procedure. Instructions pertain only to
specific operation of Rotarex.