UPM Institutional Repository

The effect of olivine content and curing time on the strength of treated soil in presence of potassium hydroxide


Citation

Fasihnikoutalab, Mohammad Hamed and Pourakbar, Shahram and Ball, Richard J. and Kim Huat, Bujang (2017) The effect of olivine content and curing time on the strength of treated soil in presence of potassium hydroxide. International Journal of Geosynthetics and Ground Engineering, 3 (12). pp. 1-10. ISSN 2199-9260; ESSN: 2199-9279

Abstract

When olivine (Mg2SiO4) is activated with potassium hydroxide (KOH), it acquires the ability to improve the unconfined compressive strength of soil. This paper investigates the use of olivine for soil stabilisation through alkaline activation by focusing on the role of different alkali activated olivine contents (5–20 wt%) in stabilising native soil at different curing durations. The strength results were supported by a detailed microstructural and compositional analysis including scanning electron microscopy, energy-dispersive X-ray spectroscopy and X-ray diffraction. Use of olivine in the presence of KOH increased the shear strength of soil up to 7.4 MPa in 90 days as a result of the formation of brucite, quartz and mullite in the structure of treated soil. This achievement implies a tremendous effect of olivine on the strength behaviour of treated soil. These results provide essential information which is significant from an environmental perspective as it offers a low energy alternative to existing technologies, for soil stabilisation.


Download File

[img]
Preview
Text (Abstract)
The effect of olivine content and curing time on the strength.pdf

Download (105kB) | Preview

Additional Metadata

Item Type: Article
Divisions: Faculty of Engineering
DOI Number: https://doi.org/10.1007/s40891-017-0089-3
Publisher: Springer Verlag
Keywords: Olivine; Alkaline activation; Soil stabilization; Microstructure analysis
Depositing User: Mas Norain Hashim
Date Deposited: 27 Aug 2018 04:14
Last Modified: 27 Aug 2018 04:14
Altmetrics: http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.1007/s40891-017-0089-3
URI: http://psasir.upm.edu.my/id/eprint/63433
Statistic Details: View Download Statistic

Actions (login required)

View Item View Item