Abstract

This study focused on effects of intrinsic sulfate in gypseous soil on its collapsibility potential when stabilized with fly ash geopolymer binder. Accordingly, compression and collapsibility tests were performed on the binder and the stabilized soil, respectively. XRD, TGA, and SEM/EDX tests were also conducted to trace changes due to geopolymerization and sulfate attack before and after exposure at different ages of up to 90days. The results showed the formation of geopolymer gel (A-S-H) with higher strength and more sulfate resistance than Portland cement paste in binder. Furthermore, incorporation of KOH (12M) activated fly ash in gypseous soil recorded the lowest collapsible potential and coefficient of permeability at 90days of exposure.

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call

Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.