Stabilization of Algerian Clayey Soils with Natural Pozzolana and Lime

  • Khelifa Harichane Chlef Hassiba Benbouali University
  • Mohamed Ghrici Chlef Hassiba Benbouali University
  • Said Kenai Blida Saad Dahleb University

Abstract

Cohesive soils with a high plasticity index present difficulties in construction operations because they usually contain expansive clay minerals. However, the engineering properties of soils can be improved by different techniques. The aim of this paper is to study the effect of using lime, natural pozzolana or a combination of both lime and natural pozzolana on plasticity, compaction and shear strength of two clayey soils classified as CH and CL according to the unified soil classification system (USCS). The obtained results indicated that for CH class clay soil, the plasticity index decreased significantly for samples stabilized with lime. On the other hand, for the soil classified as CL class clay, a high decrease in the plasticity index value was observed for samples stabilized with natural pozzolana compared to those stabilized with lime. Also, both the cohesion and internal friction angle in lime added samples were demonstrated to increase with time. The combination of lime and natural pozzolana exhibits a significant effect on the enhancement of both the cohesion and  internal friction angle at later stages. The lime-natural pozzolana combination appears to produce higher shear strength parameters than lime or natural pozzolana used alone.

Keywords

lime, natural pozzolana, soil stabilization, Atterberg’s limits, shear strength
Published
01-06-2017
How to Cite
HARICHANE, Khelifa; GHRICI, Mohamed; KENAI, Said. Stabilization of Algerian Clayey Soils with Natural Pozzolana and Lime. Periodica Polytechnica Civil Engineering, [S.l.], june 2017. ISSN 1587-3773. Available at: <https://pp.bme.hu/ci/article/view/9229>. Date accessed: 23 sep. 2017. doi: https://doi.org/10.3311/PPci.9229.
Section
Research Article