A Laboratory Methodological Proposal for “Geotechnical Lime Stabilization of A-4 Soils”

Authors

  • Diego Barbero Geological, Geotechnical and Geophysical Office Dr. Diego Barbero
  • Leandro Serraiocco
  • Andrea Maroni
  • Sandra Peyrot

DOI:

https://doi.org/10.37591/joge.v8i1.4308

Keywords:

lime stabilization, soil stabilization, lime, lime-soil- mixture, HRB, soil treatment, Proctor compaction test, CBR penetration test

Abstract

This paper establish the beginning of a research process regarding the behavior of soils stabilized with lime. Generally, the geotechnical practice of soils stabilized with lime requires a first step conducted in the laboratory, to attest the features of “natural soils” in order to improve their behavior in term of geotechnical performance and, a second step, carried out onsite with experimental test fields, in order to verify the benefit obtained by the use of lime treatments.

The topic of this research focuses on the first step above described. In order to provide geotechnical laboratory tests useful to our purpose, A-4 soils (according to HRB classification) and CL-ML (according to USCS soils classification) were tested. These soils show a large distribution in the Piedmont Po Plain (NW Italy): they outcrop in correspondence to terraced alluvial fans linked to alpine watercourses and are generally applied for stabilization with lime for foundation structures and pavements. Additionally, these soils are mainly inorganic with a marked tendency towards sandy silt soils with the presence of gravel. The presence of gravel results on a greater strain hardening in the behavior of shear strength of soils.

Finally, in support of geotechnicians, who have to draw up specifications, a systematized laboratory methodology to follow for A-4 soils stabilization with lime is here reported and a detailed analyses of mechanical behavior obtained on “soil-lime-water mixtures” is described.  

References

Thomson MR (1969). Engineering properties of lime-soil mixtures. J Mater ASTM 4(4), 968–969

Broderick GP, Daniel DE (1990). Stabilizing

compacted clay against chemical attack. ASCE J Geotech Eng Div 116(10), 1549–1567

Thomson MR (1969). Engineering properties

of lime-soil mixtures. J Mater ASTM 4(4), 968–969

Barbero D. , Boano P., Colla M.T., Forno M.G. 2007. Pleistocene terraced fluvial succession, northern slope of Torino Hill. Quaternary International, 171-172, 64-71p.

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Published

2021-03-31

Issue

Vol. 8 No. 1 (2021)

Section

Articles

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