Clayey soil stabilization using alkali-activated cementitious materials




Soil stabilization, Clayey soil, Alkali-activated cement, Fly ash, Blast furnace slag


In this study, a clayey soil classified as A-7-5 according ASTM D3282, was stabilized using alkali-activated cementitious materials (AAC) added to the soil dry in percentages of 20 and 30%. Fly ash (F1, F2) with high unburned carbon content (up to 38.76%), hydrated lime (L) and granulated blast furnace slag were used. Unconfined compressive strength and flexural strength at 28 days of curing and the durability after 12 wetting-drying cycles were evaluated. The results were compared with a soil-cement reference mixture. The soil treated with AAC-F1L showed a volume expansion of 0.51% and volume contraction of -0.57% compared with the 0.59% expansion and -0.68% contraction of the soil-cement reference mixture. Additionally, the mass loss after the wetting and drying cycles is only 3.74% which is slightly lower than the mass loss of the soil stabilized with ordinary Portland cement (OPC) (3.86%) and well below the value specified in Colombian regulations (7%).


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How to Cite

Rivera, J. F., Orobio, A., Mejía de Gutiérrez, R., & Cristelo, N. (2020). Clayey soil stabilization using alkali-activated cementitious materials. Materiales De Construcción, 70(337), e211.



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