Strength Performance of Soft Clayey soil Solidified by Slag- Fly Ash – Metakaolin Based Geopolymer

Abstract The objective of this study was to evaluate the suitability of geopolymer materials as an additive to the engineering properties of weak clay soils. Various geotechnical laboratory tests were performed on both stabilized and natural soils. Geopolymer components (slag, fly ash, and metakoline) were added at varying rates, and two molarity activation solutions (8 and 10) were used for all mixtures with three ages: 24 hours, 7 days, and 14 days. The unconfined shear test findings revealed that when adding geopolymer with a molarity of 8 to soil with a water content of 22%, within 24 hours, 7 days, and 14 days, the indirect shear strength rises, correspondingly 322.30, 681.60, and 768.94 kPa. The unconfined shear test findings revealed that mixtures with a molarity of 10 and soil with a water content of 22% increased the strength within 24 hours, 7 days, and 14 days, respectively. 417.76, 1044.73, and 1290 kPa. The mixtures with a molarity of 8 and soil with a water content of 24% enhance the strength within 24 hours, 7 days, and 14 days, in that order. 157.23 kPa, 382.73 kpa, and 398.72 kPa. UCS test findings revealed that applying geopolymer with a molarity of 10 to soil with a water content of 24% increased the indirect shear strength within 24 hours, 7 days, and 14 days, respectively. 316.41, 470.17, and 1150.53 kPa. As a result, geopolymer materials have been shown to enhance the characteristics of clay soils in geotechnical applications.