PENGARUH UKURAN BUTIR SERBUK FLY ASH TERHADAP KEKUATAN IMPACT BAHAN KOMPOSIT BERMATRIKS EPOXY
Abstract: Mixing types of
epoxy polymers with fly ash (fly ash) coal into composite materials is expected
to be one of the ways to look for an alternative to metal materials. Mixing two
different materials is intended to improve the mechanical properties of
composites by utilizing waste coal as a reinforcing material. Making specimens
was based on differences in particle size of the fly ash powder. Fly ash sifted
with a sieve to obtain a variation of the size of the fly ash particles with a
size of 40 mesh, 80 mesh and 120 mesh. While the epoxy resin used was a general
purpose type (Bisphenol Aepichlorohydrin) Bakelite EPR 174 with a ratio between
the epoxy resin and hardener 1:1. After getting the fly ash according to the desired
size, made by mixing epoxy resin through the calculation of the mass fraction.
The process of mixing epoxy resin with coal fly ash waste is done with matrix
mixing ratio by 60% and 40% fly ash. Then do the impact test for pure epoxy
resin and for composites. Fracture area photo by scanning electron microscope
(SEM) was used to analyze the causes of failure in composites. Testing was
conducted ann accordance with the standard impact test ASTM D 6110. The test
results showed the addition of fly ash particles with increasing particle size
of 40 mesh, 80 mesh and 120 mesh can improve the impact strength of the
composite. Highest impact strength of the composite obtained at 120 mesh
particle size of 3.967 x 10-3 J/mm2. With the decrease in the size of particles,
extensive contact between the surface of fly ash with resin will be many more.
So, to the improve impact strength. In the SEM image results look excellent
interface bonding between the matrix with fly ash particles. In the composite
looks much voids or porosity.
PENULIS: Agus Setiawan, Shirley
Savetlana, Gusri Akhyar Ibrahim
Kode Jurnal: jptmesindd130532
