EFFECT OF PARTICULATE SIZE OF FLY ASH AND FLY-ASH WEIGHT FRACTION TO FLEXURAL PROPERTIES OF FLY ASH â??POLYESTER COMPOSITE
| Main Author: | , Kuncoro Diharjo, Jamasri, Feris Firdaus |
|---|---|
| Format: | Article NonPeerReviewed |
| Terbitan: |
[Yogyakarta] : Fak. MIPA Universitas Gadjah Mada
, 2007
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| Online Access: |
https://repository.ugm.ac.id/93961/ http://repository.ugm.ac.id/digitasi/index.php?module=cari_hasil_full&idbuku=1760 |
Daftar Isi:
- <p>In Indonesia, there is a big number of the fly ash powder waste resulted by industries producing batubara. The<br /> fly ash can be used as particulate reinforcement of composite material design. The objective of this research is to<br /> investigate the effect of particulate size and content of fly ash to flexural properties of the fly ash - polyester<br /> composite. The materials in this research are fly ash particulate, unsaturated polyester resin (UPRs) and MEKPO<br /> hardener. The MEKPO hardener content is 1% (v/v) of the polyester. The variables in this research are particulate<br /> grain size of fly ash and fly-ash weight fraction (Wf). The composites were made by using a press mold method. The<br /> specimens were produced according to ASTM D 790 standard, and they were tested by using a universal testing<br /> machine. According to the result, the fly ash powder can be used as reinforcement material to increases flexural<br /> properties of composite materials. The smaller particulate grain size of fly ash, the higher flexural stress and flexural<br /> strain of the fly ash - UPRs composite. However, the flexural modulus of the composite has the similar values for<br /> some size of fly ash. For 40% of fly ash content, the composite reinforced by 0.10 mm of particulate grain size of fly<br /> ash has 127.24 MPa in flexural strength and 4.11 GPa in flexural modulus. The increasing of fly-ash content can<br /> increase the flexural strength and modulus of the composite. The composite has the maximum flexural strength for<br /> 40% of fly-ash weight fraction, and the flexural modulus of the composite increases linearly with the increasing of Wf.<br /> In contrast, the flexural strain of the composite decreases when the fly ash content increases. The increasing of fly<br /> ash content decreases the elasticity of the composite and increases the brittleness.</p>