Engineering and Technology Journal

Improvement of Soft Clayey Soil by Bio-polymer

Document Type : Research Paper

Authors

Civil Engineering Department, University of Technology, Baghdad, Iraq.

Abstract

This examination explains the utilization of bio-polymer powder for clayey soil enhancement. The article concentrates around examining the strength attitude of the clayey soils built up with homogenous bio-polymer. Carboxy methyl cellulose was determined as bio-polymer material to build up the normal soft clayey soil. The biopolymer has been added to the soil with two separated rates (0.5 and 3%) by total weight of soil. Different tests were carried out to consider the impact of utilizing this polymer as a balancing out specialist on the geotechnical properties of soil. It was estimated that as the bio-polymer content expands in the soil, the specific gravity decreases, while the optimum water content (OMC) is expanded. The results showed different effects on Atterberg’s limits; by increasing the liquid limit(L.L) and plasticity index(P.I) while the plastic limit decrease. The tests additionally mirrored a huge improvement in the unconfined compressive strength (UCS) of the treated soils. With the increment in biopolymer content, the consolidation index (Compression index Cc and recompression index Cr) decrease.

Highlights

  • Carboxy methyl cellulose was added to soft clay with two separated rates (0.5 and 3%) by total weight.
  • Different tests were conducted to consider the impact of polymer on soil geotechnical properties.
  • As the bio-polymer content increases, liquid limit and plasticity index increase.
  • A huge improvement in unconfined compressive strength of treated soils was gained.
  • With the increment in biopolymer content, the soil compressibility decrease.

Keywords

References
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Engineering and Technology Journal
Volume 39, Issue 8
Civil Engineering
August 2021
Page 1301-1306
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