Improving The Engineering Properties of Expansive Clayey Soils by Adding Fly Ash Based-Geopolymer-A Review

Zahraa Mohammed Abdullah; Mohammed

doi:10.71229/4157ts64

Authors

Zahraa Mohammed Abdullah Department of Civil Engineering, College of Engineering, Mustansiriyah University, 10064 Baghdad, Iraq
Mohammed Hussein Al-Dahlaki Department of Civil Engineering, College of Engineering, Mustansiriyah University, 10064 Baghdad, Iraq

DOI:

https://doi.org/10.71229/4157ts64

Keywords:

Soil Stabilization, , Geopolymer, , Fly Ash, , Alkali Activator, Expansive Soil

Abstract

Expansive soils are among the most common causes of natural hazards worldwide due to their swell and shrink behaviour with changing of water conditions; the costs associated with their damages sometimes exceed the losses of floods and hurricanes. Therefore, engineers do their best to eliminate soil's risks as much as possible. Treatment methods are divided into mechanical and chemical. The most common method globally is chemical, for many reasons, including the availability of treatments in local markets and the satisfactory results they achieve. One of the most innovative materials widely used in civil engineering recently is geopolymer, which has proven to be very effective in reducing environmental pollution of traditional stabilizers. This research briefly discusses the usage of geopolymer as a stabilizing agent. The focus of this research is on reducing expansion potential using fly ash-based geopolymer. Previous studies have shown that increasing the percentage of fly ash in the geopolymer with any type of alkaline activator leads to a decrease in swelling potentials.

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