InstroTek
25
CoreLok™ Max/Apparent Gravity Data Collection Table
Sample #
A
Bag
Weight
(grams)
B
Weight of
Rubber
Sheets
(grams)
(put in 0 if
not used)
C
Weight of
Sample in
air
(grams)
D
Weight of
Bags and
Sample in
Water
(grams)
E
(A+B+C)
D
Total
Volume
F
A/Vc
+B/Rc
Bag and
rubber
sheet
Volume
G
E-F
Sample
Volume
H
C/G
Density
R
C
=
_____ g/cm3 (value written on rubber sheets)
V
C
= 0.903 g/cm
3
Do not squeeze down on the bags, when
spreading the sample.
Before using the large bag, inspect the bag
for holes or stress points. Do not use
damaged bags.
Use a large water tank for conducting this
test.
Use all three white filler plates.
Remove the sliding plate.
Place rough side of the channeled bag
down inside the external bag.
Immediately place the sealed sample in the
water tank
.
To stop the possibility of air from getting into
the bag, cut 1” (25mm) of the bag while at
least 2" (50mm) under the water.
Hold the bags open for 15 seconds to allow
water to get in
If you see a massive amount of bubbles (Like
boiling water) coming out of the bag, repeat
the test.
While under water, place the sample in the
weighing basket
Use the alligator clip to keep the cut portion
of the bag from floating out of water.
Make sure the bag is not floating out of the
water or touching the sides and bottom of
the water tank.
Use the rubber sheet if the material
consistently punctures bags.
Important
