Abstract
The chemical treatment process ensures an improvement in mechanical properties of the soil such as shear strength, permeability and bearing capacity. However, sometimes this technique has several negative effects on the environment depending on the chemical agent used. Remediation technology by biopolymers is one of the new promising ecological and environmentally friendly solutions. Therefore, this experimental work is carried out to investigate the effect of kaolin clay contents on the shear strength of sand treated with xanthan gum (XG). Direct shear tests were performed on Sand-Kaolin mixtures with Kaolin proportions of 0; 10; 20 and 30%, treated with xanthan gum content of 0.25% and 0.5%. The treated samples were cured for 7, 14 and 28 days before testing. Results have shown that the xanthan gum improved significantly the shear strength of sand-Kaolin mixtures compared to the clean sand. Furthermore, a considerable enhancement of cohesion and friction angle of soil was observed particularly for sand-Kaolin mixtures.
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Abbreviations
- PH:
-
Potential of hydrogen
- Fc:
-
Fines content
- G S :
-
Specific density
- D 50 :
-
Medium size
- C U :
-
Uniformity coefficient
- C C :
-
Coefficient of curvature
- emin :
-
Void ratio
- emax :
-
Maximum void ratio
- Ip:
-
Plasticity index
- W:
-
Water content
- Kc:
-
Kaolin content
- Sc:
-
Sand content
- W i :
-
Initial water content
- X G :
-
Xanthan gum content
- γ d :
-
Dry density
- W7 days :
-
Water content of specimen at 7 days
- W14 days :
-
Water content of specimen at 14 days
- W28 days :
-
Water content of specimen at 28 days
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Acknowledgements
All tests were carried out in the laboratory of Material Sciences & Environment at Hassiba Benbouali of Chlef, Algeria. The writers acknowledge the technicians who contributed to this experimental program.
Funding
The authors are grateful for the financial support received from the Directorate General for Scientific Research and Technological Development, Algeria.
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H.A.B., N.D., M.M.B., S.D., A.B.E. and H.F. contributed equally to this work H.A.B., N.D., M.M.B., S.D., A.B.E. and H.F. wrote the whole manuscript. H.A.B. and M.M.B. drew all the figures and tables. N.D., M.M.B. and S.D. reviewed and edited the paper. M.M.B., S.D., A.B.E. and H.F. conceptualized the work. All authors read and approved the final paper.
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Berkane, H.A., Della, N., Benziane, M.M. et al. Laboratory investigation on the effect of a combination of xanthan gum and clay on the behavior of sandy soil. Innov. Infrastruct. Solut. 7, 269 (2022). https://doi.org/10.1007/s41062-022-00867-z
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DOI: https://doi.org/10.1007/s41062-022-00867-z