Soil Improvement of Petobo Silty Sand using Ferronickel Slag and Alkaline Activators

This study aims to provide an alternative soil improvement that can be applied in the Petobo area, which experienced liquefaction on September 29, 2018. Ferronickel slag is utilized as a binding agent. Furthermore, large concentrations of alkaline solutions (potassium hydroxide and sodium hydroxide) are activators activate kaolin initiate geopolymer production process. From test results, it concluded potassium effective solution. The maximum unconfined compressive strength sample about 530 kPa with concentration 10% ferronickel 10M activator. value twice larger than if we cement same amount concentration. Hence, effect admixture activator more dominant only. Scanning Electron Microscope X-Ray Fluorescence Spectrometer tests were also carried out investigate chemical bonds occurred samples. It revealed matrix envelops particles resulting from reaction. composition SiO2 Al2O3 treated silty sand decreased. might due reaction occurs so content compounds reduced. Because uses form KOH NaOH solution, there increase levels MgO compared untreated sand.