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ASBUTON
PROPERTIES AND PHYSICAL
CHARACTERISTICS
Asbuton
natural asphalt consists of a mixture of bitumen and
minerals. Bitumen properties contained in Asbuton is described in the Table 1. below.
Table 1. Properties of
Bitumen in Asbuton natural asphalt.
|
Type |
Kabungka
Asbuton |
Lawele Asbuton |
|
Item |
A |
B |
C |
D |
– |
rich |
|
Color |
|
black |
black |
dark
brown |
|
surface |
: gray |
|
core |
: light |
|
|
:
brown |
|
brown |
black |
|
Fracture |
|
|
|
|
|
|
|
|
Luster |
|
present |
absent |
absent |
absent |
absent |
present |
|
Properties
of
bitumen |
Specific Gravity, 25ºC |
1.077 |
1.062 |
1.089 |
1.080 |
1.083 |
1.043 |
|
Penetration,
25ºC |
10 |
25 |
5 |
4 |
3 |
158 |
|
Softening Point,
ºC |
66.0 |
57.0 |
75.0 |
72.0 |
78.5 |
41.5 |
|
Asphaltenes,
% |
25.6 |
26.9 |
33.8 |
33.2 |
42.4 |
21.1 |
|
Resins & Aromatic
Components,
% |
67.5 |
64.4 |
63.5 |
61.7 |
49.9 |
67.5 |
|
Oils (saturated), % |
6.9 |
8.6 |
2.7 |
5.1 |
7.6 |
11.4 |
Mineral Properties
contained in Asbuton is described in Table 2. below.
Table 2. Properties of Minerals in Asbuton natural asphalt.
|
Minerals |
Percent of Weight |
|
CaCO3 |
81.62
–
85.27 |
|
MgCO3 |
1.98
–
2.25 |
|
CaSO4 |
1.25
–
1.70 |
|
CaS |
1.17
–
0.33 |
|
H2O
(crystal water) |
1.30
–
2.16 |
|
SiO2 |
1.95
–
8.25 |
|
Al2O3
+ Fe2O3 |
1.15
–
2.84 |
|
others |
1.83
–
1.12 |
The
Asbuton
mineral component is made up of
particles of
various grades. Table. 3. below shows Sieve Analysis of mineral filler for various number of
sieve size .
Table 3. Sieve Analysis of mineral filler
use in asphalt paving mixtures.
|
No. of
Sieve Size |
Particle Sizing (μ) |
Percent Paving |
|
Lawele |
Kabungka |
| 4 |
4,750 |
100 |
100 |
| 8 |
2,360 |
100 |
92 |
| 16 |
1,180 |
100 |
92 |
| 30 |
600 |
100 |
84 |
| 50 |
300 |
99 |
69 |
| 100 |
150 |
67 |
48 |
|
200 |
74 |
52 |
38 |
| |
37 |
38 |
|
| |
30 |
33 |
|
| |
10 |
23 |
|
| |
3 |
22 |
|
CHARACTERISTICS OF ASBUTON KABUNGKA SITE A & B
|
Characteristic |
Site A |
Site B |
|
Penetration, 100 gram, 5 s, 25ºC,
0.10 mm |
19 |
24 |
|
Softening Point, Ring & Ball,
ºC |
61.5 |
60 |
|
Flash Point (Cleveland Open Cup)
ºC |
272 |
260 |
|
Weight Loss (5 hour, 163
ºC), % |
14.70 |
13.25. |
|
Solubility in CCl4, % |
100 |
100 |
|
Ductility (5 cm/minute, 77 ºF) |
10 |
6 |
|
Penetration after Weight Loss |
5.3 |
4.2 |
|
Specific Gravity, 25
ºC |
1.1269 |
1.0826 |
These properties
collectively provide high mix stability, resistance to cracking,
excellent durability, and unparalleled demonstrated performance in the
construction of cost effective, long life pavements.
END
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