Recent drive by Indonesian government to increase domestic ferronickel production implies that the amount of ferronickel slag as primary form of solid waste also increases. Conversion of high-magnesium ferronickel slag (HMFNS) into geopolymer, a cementitious polymeric alkal aluminosilicate material (Figure 1), has been studied by using HMFNS and coal fly ash (FA) produced by a smelter in Northern Maluku province. HMFNS was ground in a ball mill to median particle size. Geopolymer mortar specimens were prepared by activating HMFNS-FA blends using mixture of sodium hydroxide and sodium silicate as activator solution. Variables in this research consist of mass ratio of sodium silicate to sodium hydroxide in the activator and mass ratio of HMFNS to FA in the reacting mixture.
Figure 1. Macromolecular structure of geopolymer
Contact Person:
Tjokorde Walmiki Samadhi, Ph.D. (twsamadhi@che.itb.ac.id)
