Correlation of the Na2SiO3 to NaOH Ratios and Solid to Liquid Ratios to the Kedah's Soil Strength

Geopolymer was used for the soil stabilization of Kedah’s soil at different ratios of solid to liquid and Na 2 SiO 3 to NaOH in order to achieve the desired compressive strength. The geopolymerization process which produces an aluminosilicate gel was occurred due to the mixing of Kedah’s soil and fly ash with Na 2 SiO 3 and NaOH. Soil stabilization by geopolymer was synthesized by the activation of fly ash and Kedah’s soil with Na 2 SiO 3 and NaOH at different ratios of solid to liquid (1.5, 2.0, 2.5 and 3.0) and Na 2 SiO 3 to NaOH (0.5, 1.0, 1.5, 2.0, 2.5 and 3.0) at a specific constant concentration of NaOH solution of 6M. The compressive strength up to 5.12 MPa was obtained at 3.0 of solid to liquid ratio and 2.5 of Na 2 SiO 3 to NaOH ratio in 7 days curing at room temperature.