Physicochemical behavior of tropical laterite soil stabilized with non-traditional additive View Full Text


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Article Info

DATE

2015-03-03

AUTHORS

Nima Latifi, Aminaton Marto, Amin Eisazadeh

ABSTRACT

Non-traditional soil stabilizers are widely used for treating weak materials. These additives are cost- and time-effective alternatives to more traditional materials such as lime and cement. It has been well established that the treatment of natural soil with chemical additives will gradually affect the size, shape, and arrangement of soil particles. Furthermore, the degree of improvement is dependent on the quantity and the pattern of new products formed on and around the soil particles. In this paper, unconfined compressive strength (UCS) test was performed as an index of soil improvement on mix designs treated with calcium-based powder stabilizer (SH-85). The time-dependent changes in shear strength parameter and compressibility behavior of treated soil were also studied using standard direct shear and one-dimensional consolidation tests. In order to better understand the shape and surface area of treated particles, FESEM, N2-BET, and particle size distribution analysis were performed on soil-stabilizer matrix. From engineering standpoint, the UCS results showed that the degree of improvement for SH-85-stabilized laterite soil was roughly five times stronger than the untreated soil at the early stages of curing (7-day period). Also, a significant increase in the compressibility resistance of treated samples with curing time was observed. Based on the results, less porous and denser soil fabric was seen on the surface of clay particles. FESEM images of the treated mix designs showed the formation of white lumps in the soil fabric with the cementitious gel filling the pores in the soil structure. More... »

PAGES

433-443

References to SciGraph publications

  • 2010-10-17. Characterization of phosphoric acid- and lime-stabilized tropical lateritic clay in ENVIRONMENTAL EARTH SCIENCES
  • 2005-06. Compressibility behaviour of lime-stabilized clay in GEOTECHNICAL AND GEOLOGICAL ENGINEERING
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    http://scigraph.springernature.com/pub.10.1007/s11440-015-0370-3

    DOI

    http://dx.doi.org/10.1007/s11440-015-0370-3

    DIMENSIONS

    https://app.dimensions.ai/details/publication/pub.1036020202


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