Pumice Typical Screen Analysis of Grades
More than 15 grades available.

100 gram samples are split and screened dry, on Rotap Shaker for 10 minutes, with sieves meeting ASTM E11-61T.
(Procedure similar to ASTM D392, Method A.)

U.S. Standard Mesh
Percentages on Each Mesh Grade (T=TRACE less than .05 grams)
Size No.
Inches Opening
Microns
FFFF
FFF
FF
F
0
01/2
03/4
1/2
1
11/2
3
4
5
10
.0780
2000
14
.0550
1410
1-40
1-40
20
.0328
840
25-55
35-60
30
.0232
595
T-5
5-30
10-40
40
.0164
420
T-10
20-40
5-30
1-15
50
.0116
297
T-10
T-10
15-35
40-60
1-20
60
.0097
250
T-10
15-35
35-55
10-30
T-5
80
.0069
177
T-5
T-10
T-10
30-55
35-55
15-30
1-10
100
.0058
149
T-5
1-10
1-10
20-35
15-30
T-15
T-5
120
.0049
125
1-10
1-10
1-15
10-25
1-10
140
.0041
105
T-10
1-15
10-30
10-30
1-10
170
.0035
88
T-10
T-10
1-15
10-30
10-25
200
.0029
74
T
T
5-10
5-15
1-15
10-25
10-20
325
.0017
44
10-20
15-25
10-25
15-30
10-25
20-40
20-35
PAN
80-90
75-85
70-80
50-75
40-70
1-10
1-10
T-10
T-5
T-5
T-5
T-10
T-5
Totals
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
APPARENT BULK DENSITY- LBS/CU. FT. Poured loose and leveled per ASTM C29
48
47
45
45
44
37
36
34
32
31
29
28
26
OIL ABSORBTION, in lbs. per 100 lbs. of pumice
ASTM D1483
53
53
53
58
67
110
97
97
97
92
92
85
85
Grade
FFFF
FFF
FF
F
0
01/2
03/4
1/2
1
11/2
3
4
5

Note:
A trace is allowable on the next coarser test sieve for each grade other than FFFF, FFF, FF, and F.
The allowable tolerance as to the amount shown on the coarsest and finest sieve (or pan) for each grade is plus or minus 5% of total.
The percentages shown on sieves intermediate may vary somewhat beyond this tolerance.

Test samples available on request.

Pumice Typical Chemical Analysis
More than 15 grades available.
SILICON DIOXIDE (Si02)
74.200%
IRON OXIDE (Fe203)
1.620%
ALUMINUM OXIDE (A1203)
12.520%
MAGNESIUM OXIDE (Mg0)
.170%
PHOSPHOROUS (P)
.003%
ALKALIES NOT TESTED FOR:
SODIUM OXIDE (Na0)
POTASSIUM OXIDE (K20)
MOISTURE



11.047%
---------
100.000%
pH (IN 10% AQUEOUS SOLUTION)
8.2
COLOR
"NEAR WHITE"
Pumice General Physical Properties
More than 15 grades available.
THERMAL CONDUCTIVITY
(K factor) in BTU/hr/sq. ft. & 1°F/in.
.630 to .438
Fines to Coarse
HARDNESS on Mohs scale
5.5 to 6
SPECIFIC GRAVITY at 24°C
2.25
INDEX OF REFRACTION
1.5
FUSION TEMPERATURE
2730°F
CRUSHING STRENGTH
(typical) in lbs/sq. in.
one inch compaction
two inch compaction
990
2940