STABILIZATION OF EXPANSIVE SOIL USING MULTI-ADDITIVES
Abstract
ABSTRACT
Expansive soils characterized by their significant volume changes with moisture
fluctuations, pose considerable challenges in civil engineering, particularly in construction
and pavement integrity, the stabilization of these soils is crucial to mitigate risks
associated with their swelling and shrinkage behavior. This study reviews various
admixtures used for stabilizing expansive soil, focusing on palm oil fuel ash and calcium
carbide residue as effective agents. Laboratory tests were conducted to evaluate the
geotechnical properties of treated soils, including Sieve analysis, Atterberg limit test,
Compaction test, X-Ray Diffraction (XRD), Spectrum Electron Microscopy (SEM), X
Ray Fluorescence (XRF) and Fourier Transform Infrared (FTIR). Different proportion of
palm oil fuel ash-calcium carbide residue mixtures were tested to determine optimal ratios
for enhancing soil stability. The use of palm oil fuel ash-calcium carbide residue
admixtures presents a sustainable and cost effective solution for stabilizing expansive
soils. This method not only improves the engineering properties of the soil but also
contributes to environmental sustainability by utilizing industrial waste materials. The
research underscores the importance of employing such stabilization techniques in
construction to enhance durability and reduce maintenance cost.
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