7 METHODS
3.1 Flowchart of Research
Finish Conclusion
Writing test result data Discussion
Testing absorptive sound ANSI S1.13
The impact test ASTM D 256-00
Bending test ASTM D 790-02
Method of making a composite with a press mold
Making sound absorption test specimens according to standard
Manufacture of test specimens and impact bending test according to standard
Moisture content testing and testing density
Coconut shell charcoal V
f 40, 50, 60
Sponge and plywood
Manufacture molds according to
standard PVAC Glue
Coconut shell charcoal
Start Field Survey and Study Library
Preparation of materials and equipment
8 3.2 Preparation
Material of
Composite Manufacturing Materials used in this study are
as follows: a. Coconut shell charcoal powder
Coconut shell charcoal in the first drying until water content is known
to be
8-10. Coconut shell
charcoal is used to create a composite thickness of 20mm.
By using a microscope, it is known
diameter of coconut shell charcoal powder. Of the test results, the
average diameter of the powder obtained by
11.98
.
Figure 4. Coconut Shell Charcoal b. Fox glue PVAc
The type of fox glue PVAc that used is D 1505 and this matrix is white.
Figure 5. Fox Glue c. Sponge and plywood
Sponge and plywood used is a sheet with size 50cm x 30cm.
Figure 6. Sponge and Plywood
3.3 Tools Preparation
The tools used in this study are: a. Water Content Test Device
Water content test device used to measure the moisture content of
coconut shell charcoal.
Figure 7. Water Content Test b. Digital Scales
Digital scales are the scales used to weigh the powder of coconut
shell charcoal and fox glue matrix PVAC.
Figure 8. Digital Scales c. Specimen dies
1. Sound Absorption dies Dies are
used for sound absorption tests are made of
sheet plate with a length of 1000 mm, width 500 mm,
thickness 3 mm and in the bulkhead into 3 sections with 33
mm size of the plate length.
Figure 9. Sound Absorption Dies 2. Mechanical Test Dies
The dies made from teak wood. The size of 150x40x60 mm
used for impact test, whereas for bending test is 150x60x60
mm.
9 Figure 10. Mechanical Test Dies
d. Tool presses of dies This press mold is used to help the
manufacturing process
of composite. The press tool made of
metal with diagonal of 40x40 mm.
Figure 11. Tool Pres of Dies e. Other Tolls
These tools are used to assist the process
of composites
manufacturing. These tools consist of bucket, stirrer, scissors, knives,
cater, brushes, spoons, rulers, markers and kits pasta.
Figure 12. Other Tool f. Bending Test Tool
The tools used to perform the bending test of composites are
Universal Testing Machine. Figure 13. bending test Tool
g. Impact Test Tool Charpy impact test tool. This tool is
used to perform impact test of composites.
Figure 14. Impact Test Tool
h. Sound Level Meter Sound level meter is a device used
to test the sound absorption.
Figure 15. Sound Level Meter
RESULTS AND DISCUSSION 4.1 Impact Test
The composite impact test use charpy method that is done by making
the specimen in accordance with the standard
ASTM D 256-00.
Figure 16. Impact test Result
10 Table 1. Impact Test
From the table above can be created
histogram from
average energy absorption and the average
impact value composite coconut shell charcoal powder with various volume
fractions of 40, 50 and 60 with PVAC glue matrix.
Diagram 1. average energy absorption and the average impact value
composite coconut shell charcoal powder
In the histogram above shows that the highest average at impact
number is 40 volume fraction of 0.0100 J mm ² and the lowest
average impact number is 60 volume fraction of 0.0063 J mm ²
4.2 Bending Test
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