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Khaerudini, Deni S
Pusat Penelitian dan Pengembangan Kualitas dan Laboratorium Lingkungan (P3KLL)

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ASPEK LINGKUNGAN DAN PEREKAYASAAN PROSES DAUR ULANG KALENG MINUMAN DAN ABU SEKAM PADI SEBAGAI MATERIAL KOMPOSIT MELALUI METODE METALURGI SERBUK Khaerudini, Deni S; Tetuko, Anggito P; Sebayang, P; Muljadi, Muljadi
Jurnal Ecolab Vol 3, No 2 (2009): Ecolab : Jurnal Pemantauan Kualitas Lingkungan
Publisher : Pusat Penelitian dan Pengembangan Kualitas dan Laboratorium Lingkungan (P3KLL)

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Abstract

The use of recycling aluminum from beverage can and rice-hull ash (RHA) offers an alternative material is presentedin this work. The aluminum cans are cut in little flakes in 5 – 10 mm size with a shears, and then were milled to obtainfine powders. Milling process was conducted in vibratory disc mill with milling variation for 10 and 20 minute. RHAwas obtained by calcinations of the rice-hulls at 900oC during 2 h in electrical furnace under oxidizing atmosphere.While, SiC as another silica source was utilized. After obtained aluminium fine powder from beverage can as matrixand silica powder from rice-hull and SiC as reinforce, then the raw material were milled by powder metallurgy methodfor production of Al/SiCp composites. The reinforcement composition of SiC to RHA was 30:20% vol., while thevolume ratio of matrix to reinforce was 80 to 20. The specimen test was obtained by cold compaction at 300 MPa andsintering at 600oC under high purity nitrogen atmosphere with holding time for 1 h. The composites sample weresubmitted at mechanical tests and samples microstructures were analyzed by optical microscope. Experimentalresults obtained shows that the use of RHA was beneficial to avoid corrosion through the formation and subsequenthydration of the Al4C3 phase and this recycle composite sample have significant potential as alternative material forautomotive or mechanical tools application. For ecological and economic routes, it reduces the use of city landfillsas consequently of abundant of aluminium beverage can and rice-hull, and the technique utilized in this work is veryimportant for economized routes and consequently, less expensive, compared to conventional methods.
PREPARASI BETON POLIMER BERBASIS SLUDGE – ABU TERBANG DAN KARAKTERISASINYA Sebayang, Perdamean; Muljadi, Muljadi; Khaerudini, Deni S; Tetuko1, Anggito P
Jurnal Ecolab Vol 3, No 2 (2009): Ecolab : Jurnal Pemantauan Kualitas Lingkungan
Publisher : Pusat Penelitian dan Pengembangan Kualitas dan Laboratorium Lingkungan (P3KLL)

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Abstract

Polymer concrete has been made using fly ash and sludge waste for raw material bases, and epoxy resin was used asbinder material. The sludge raw material was dried and crushed until fine powder morphology, then the fly ash wascrushed again until through out 100 mesh and it blended until became homogeneous mixing materials. The rawmaterial compositions where added with epoxy resin, that is: 10 and 15 % from the total weight of raw material. Thesample testing was made by hand press method with dimension: 4 x 4 x 16 cm3. The testing of samples included:density, water absorption, fire resistance, compressive, and bending strength. Microstructure analysis was usedScanning Electron Microscope (SEM) method. The results show that polymer concrete based on fly ash - sludge andepoxy resin binder is properly moderate, if it is compared to conventional concrete. The best result has the compositionof 60 % fly ash, 40 % sludge, and 15 % epoxy resin (% weight) composition, with its characteristics: density= 1.93 g/cm3, water absorption = 0.74 %, compressive strength = 28 MPa, and bending strength = 12.8 MPa. Thepolymer concrete that has been made is suitable for building material application, especially in the water or submergedarea, and it also has light weight concrete specification.