| Summary: | Huge amount of disposed ash can cause severe environmental pollutions especially in large coal fired electric powerplants. One of many methods for reducing its negative impacts is utilizing the waste to produce Artificial Leight Weight Aggregates (ALWA) which is required to make light concrete for building constructions. However thorough researches have to be conducted first to find out the proper process conditions for ALWA production from fly ash and bottom ash of indonesian coals. The investigated process conditions are the mixture composition of required raw materials and the sintering conditions (e.g. temperature, duration, etc.). Moreover an equipment to mix raw materials homogeneously and to produce other shapes of ALWA, which may be better than the existing shapes, must be built during the research. The last objective of the research is characterizing the physical and mechanical properties of the ALWA and some prototypes of light concrete made from the ALWA. It is expected that both the ALWA and the light concrete can satisfy the quality and specifications determined by existing standards.
Keywords: coal ash, biomassa, CO emission.
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