Application of Alkali-Activated Palm Oil Fuel Ash Reinforced with Glass Fibers in Soil Stabilization

Lokmane Abdeldjouad, Afshin Asadi, Richard Ball, Haslinda Nahazanan, Bujang Huat

Research output: Contribution to journalArticle

Abstract

The feasibility of using palm oil fuel ash (POFA) as a
precursor for alkali activation reactions in combination with glass
fibers as a discrete reinforcement has been investigated. Experimental
work has focused on shear strength (using unconfined compression tests)
and the tensile strength (using indirect tensile tests and flexural
tests). According to the results, it was found that the peak stress
increased and the post-peak behavior was modified from a brittle to a
more ductile response depending on the amount of fiber reinforcement in
the alkali-activated mixtures. Analysis of the microstructures revealed
that the most significant factor contributing to the enhanced behavior of
the reinforced mixtures was the interaction between the geo-polymeric
matrix and fiber surface. This work brings new insights to the soil
stabilization industry providing an effective method of enhancing the
properties of soil treated by alkali activation of POFA (a low-value
agro-waste by-product) through the inclusion of glass fiber additions.
This brings advantages over the traditional calcium-based binders (i.e.
lime and cement) as their production involves the emission of carbon
dioxide, a contributing factor to the significant global warming.
Original languageEnglish
Number of pages35
JournalSoils and Foundations
Publication statusAccepted/In press - 1 Aug 2019

Cite this

Application of Alkali-Activated Palm Oil Fuel Ash Reinforced with Glass Fibers in Soil Stabilization. / Abdeldjouad, Lokmane; Asadi, Afshin; Ball, Richard; Nahazanan, Haslinda; Huat, Bujang.

In: Soils and Foundations, 01.08.2019.

Research output: Contribution to journalArticle

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AU - Ball, Richard

AU - Nahazanan, Haslinda

AU - Huat, Bujang

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