The Investigation of the Addition of Sodium Lignosulfonate to Lime Column Used For Improving the Expansive Soils

Download

index.pdf

Date

2023-1-01

Author

Ozkan, Ilyas
Çokça, Erdal

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

111
views

30
downloads

The lime column (LC) technique has been commonly used for the improvement of expansive soils. The achievement of this technique depends on the lime diffusion into the expansive soils, but lime diffusion into the expansive soil is generally a slow process due to the low permeability of these soils. In this study, sodium lignosulfonate, which is used as a superplasticizer in the concrete industry, was added to lime columns to accelerate the diffusion of lime particles. First, treated expansive clay specimens with thirty-seven 4.5 mm diameter columns were prepared in an oedometer ring. These columns were filled with two different mixtures: water-lime and water-lime-sodium lignosulphonate to investigate the effect of the addition of sodium lignosulphonate. Free swell tests were done on these treated expansive clay specimens that were subjected to different curing periods, it was observed that the treated specimens with sodium lignosulphonate lime columns (NaLS-LC) are more effective than the treated specimens with lime columns (LC). A treated expansive clay specimen (in a 30cmx30cm mold) with seven pieces of 45 mm diameter sodium lignosulphonate lime columns were prepared to observe the alteration of engineering properties of untreated expansive clay specimen (US) located between the columns. Free swell and unconfined compressive strength tests were done on the undisturbed expansive clay specimens taken from the mold between the columns. SEM-EDX analyses were made to investigate whether the ettringite mineral, which leads to swelling of the expansive soil during lime stabilization, forms or not. While the ettringite mineral formed during the curing period in the lime column stabilization method, the addition of sodium lignosulphonate to lime columns blocked the formation of the ettringite mineral. It can be stated that sodium lignosulphonate lime columns (NaLS-LC) show better performance than lime columns (LC), in the treatment of expansive clays.

Subject Keywords

Sodium lignosulphonate, expansive soil, lime column, stabilization, swelling potential, CLAY SOILS, STABILIZATION

URI

https://hdl.handle.net/11511/102484

Journal

TURKISH JOURNAL OF CIVIL ENGINEERING

DOI

https://doi.org/10.18400/tjce.1209185

Collections

Department of Civil Engineering, Article

Suggestions

OpenMETU
Core

A laboratory study on the use of lime columns to improve expansive soils Özkan, İlyas; Çokça, Erdal; Department of Civil Engineering (2021-9-09) Expansive soils are well-known for their cyclic shrink-swell behavior due to seasonal moisture changes. These cyclic movements of expansive soils are due to physicochemical changes at the particle level that are dependent on mineralogical composition of these soils. The soil depths susceptible to moisture changes are known as active depths and based on previous studies vary from shallow to deep depths. Movements from these depths reflect to the surface leading to considerable deformation to overlying infras...
The study of disorder and nanocrystallinity in C-S-H, supplementary cementitious materials and geopolymers using pair distribution function analysis Akgül, Çağla; Monteiro, Paulo JM (2011-07-01) Significant progress was achieved with the application of Rietveld method to characterize the crystalline phases in portland cement paste. However, to obtain detailed information on the amorphous or poorly crystalline phases, it is necessary to analyze the total scattering data. The pair distribution function (PDF) method has been successfully used in the study of liquids and amorphous solids. The method takes the Sine Fourier transform of the measured structure factor over a wide momentum transfer range, p...
A laboratory study of anisotropy in engineering properties of Ankara clay İspir, Mustafa Erdem; Ergun, Mehmet Ufuk; Department of Civil Engineering (2011) Anisotropy in engineering properties of soils occurs due to the depositional process forming the soil fabric and/or different directional stresses in soil history. This study investigates the anisotropy in undrained shear strength and drained compressibility of preconsolidated, stiff and fissured Ankara Clay. The compressibility behavior is determined using standard oedometer testing while the shear strength anisotropy is investigated through large diameter unconsolidated-undrained triaxial testing on undis...
Exploring Stabilization Alternatives for a Lime-Softening Sludge with a High Organic Content Dilek, Filiz Bengü; Yetiş, Ülkü (null; 2014-06-14) Stabilization of the sludge originating from a water treatment plant, where a lime‐soda softening of the creek water containing a high organic matter is employed, was investigated. Several stabilization alternatives, namely, aerobic stabilization, acid stabilization, base stabilization, lime stabilization and thermal stabilization were tested. Thermal stabilization outperformed among the others. It was observed that exposing the sludge to at least 375°C would render the sludge disposable into non‐ hazardous...
A WASHING THEORY FOR UNSATURATED FILTER CAKES USING THE CAPILLARY MODEL BATIGüN, AYSEGüL; Tosun, İsmail (Informa UK Limited, 1987-11) A rigorous washing theory is developed using the area averaging technique for unsaturated filter cakes. Limiting cases of the resulting equations are investigated. The assumptions used in the modelling are verified. The mass transfer parameters, which are evaluated by the application of the moment analysis, are shown to be directly proportional with the volumetric flow rate of the wash liquor. Experimental results also indicate that, for a given wash liquor volumetric flow rate, the increase in the cake ...

Citation Formats

I. Ozkan and E. Çokça, “The Investigation of the Addition of Sodium Lignosulfonate to Lime Column Used For Improving the Expansive Soils,” TURKISH JOURNAL OF CIVIL ENGINEERING, vol. 34, no. 1, pp. 135–152, 2023, Accessed: 00, 2023. [Online]. Available: https://hdl.handle.net/11511/102484.