The Investigation of the Scale Effect on the Swelling Potentials of Expansive Soil Treated with Lignosulphonate Lime Columns

Date

2022-06-23

Author

Özkan, İlyas
Çokça, Erdal

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Lime diffusion into the expansive soil is a substantial parameter thatinfluences the success of the lime column stabilization method. However, thediffusion velocity of lime particles into the expansive soil is very slow as theexpansive soils have low permeable properties. In this study, two different types oflignosulphonate, which are sodium and calcium, were added to lime columns toaccelerate the diffusion velocity of lime particles into the expansive soil. The sixdifferent diameters of treated specimens were selected ranging between 5 cm to30 cm and these treated specimens have 37 pieces of lime columns. The diametersof these lime columns are ranging between 3.5 mm to 21 mm with respect to thediameter of treated specimens prepared in this study. All treated specimens withlignosulphonate lime columns have lower swelling potentials than untreatedspecimens. The specimens located between the columns were tested to determinecation exchange capacity (CEC) and specific surface area (SSA) of treatedspecimens. The values of CEC and SSA of treated specimens with lignosulphonatelime columns decreased. Finally, the lignosulphonate lime columns stabilized theswelling potential, CEC and SSA of untreated specimens. However, when thedistance between the columns increases, the achievement of this stabilizationmethod decreases.

URI

https://hdl.handle.net/11511/107007

Collections

Department of Civil Engineering, Conference / Seminar