Physical and Geotechnical Long-Term Properties of Lignosulfonate-Stabilized Clay: An Experimental Investigation

This research investigates the effect of Lignosulfonate (LS), timber and paper industries by-product, in improving physical and geotechnical properties of high plasticity clay from the Amol city in the Mazandaran province, Iran. Long-term behavior of unstabilized and LS-stabilized clay by using direct shear tests were evaluated. In addition, the effect of wetting and drying cycles on the results of direct shear and unconsolidated-undrained (UU) triaxial tests was investigated and compared together. Addition of LS by aggregation of clay particles, enhanced the physical and strength properties of the clay. The effect of LS-stabilization on the internal friction angle of the soil was negligible (only one degree increase). The major part of the improvement in long-term strength of the soil, was due to increased cohesion between soil particles (from 1 to 7 kPa). Also, test results revealed that wetting and drying cycles has no considerable effect on the UU triaxial test results (up to 1.86% decrease in maximum deviatoric stress). However, in the direct shear tests, the samples are more affected by wetting and drying cycles (up to 37% decrease in peak shear strength). Scanning electron microscopy (SEM) micrographs revealed that due to the stabilization, the structure of clay was changed from a particle base to an aggregated form. In fact, in this case, the pores in the soil structure have been reduced, which has led to strength increase.

• Record URL:
  • https://doi.org/10.1016/j.trgeo.2018.09.001
• Record URL:
  • http://www.sciencedirect.com/science/article/pii/S2214391218300382
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/22143912
• Supplemental Notes:
  • © 2018 Elsevier Ltd. All rights reserved. Abstract reprinted with permission of Elsevier.
• Authors:
  • Ta'negonbadi, Bahram
  • Noorzad, Reza
• Publication Date: 2018

Language

• English

Media Info

• Media Type: Web
• Features: References;
• Pagination: pp 41-50
• Serial:
  • Transportation Geotechnics
  • Volume: 17
  • Issue Number: 0
  • Publisher: Elsevier
  • ISSN: 2214-3912
  • Serial URL: http://www.sciencedirect.com/science/journal/22143912

Subject/Index Terms

• TRT Terms: Clay soils; Lignosulfonate; Moisture content; Pores; Shear strength; Soil stabilization; Triaxial shear tests; Wetting and drying tests
• Geographic Terms: Amol (Iran)
• Subject Areas: Geotechnology; Transportation (General);

Filing Info

• Accession Number: 01681682
• Record Type: Publication
• Files: TRIS
• Created Date: Sep 24 2018 10:05AM