Humboldt H-3493A Organic Impurties Test Set - Manual

product manual
07.12
H-3492A/H-3493A
Organic Impurties Test Set
Directions: For use in the determination of organic impurties
in sand used for making concrete (ASTM C40-04 and
AASHTO T21-05)
Set Components:
Description
Model Qt.
Organic Color Plate— H-3492A 1
Bottle, 12oz. Flint Glass with Cap— H-3490A 6
Sodium Hydroxide 3%, 16oz— H-3491 1
Directions 1
Procedure:
1. Collect a representative test sample of sand, weighing about
one pound, by quartering or by the use of a sample splitter.
2. Fill one H-3490A (12oz.) bottle with a 4.5oz. volume of the
sand sample to be treated.
3. Add the H-3491 (3% Sodium Hydroxide) to the bottle until
the volume of the sand and liquid after shaking is 7 liquid
ounces.
4. Cap the bottle, shake vigorously, and allow to stand for
24 hours.
5. Compare the color of the supernatant liquid above the
sand with the H-3492 (Organic Color Plate). Make the color
comparison by holding the Color Plate and the bottle close
together and looking through them against a background
that is substantially equal in color to the northern sky.
NOTE: This test method covers the procedure for and
approximate determination of the presence of injurious
organic compounds in natural sands, which are to be
used in cement, mortar or concrete. The principal value
for the test is to furnish a warning that further tests of
the sand are necessary before they can be approved
for use.