Alkaline activation of clayey soil using Potassium hydroxide & Fly ash

  • Ahmed Giuma Elkhebu University Tun Hussein Malaysia, Department of Infrastructure and Geomatic Engineering, Barit Raaja, Johor, Malaysia
  • Adnan Zainorabidin University Tun Hussein Malaysia, Department of Infrastructure and Geomatic Engineering, Barit Raaja, Johor, Malaysia
  • Huat B. K Bujang Department of Civil Engineering, Faculty of Engineering, University Putra Malaysia, Serdang, Selangor, Malaysia
  • Ismail Hj. Bakar University Tun Hussein Malaysia, Department of Infrastructure and Geomatic Engineering, Barit Raaja, Johor, Malaysia
  • Lokman Abdeljouad Abdeljouad Department of Civil Engineering, Faculty of Engineering, University Putra Malaysia, Serdang, Selangor, Malaysia
  • Wisam khalef Dheyab Department of Civil Engineering, Faculty of Engineering, University Putra Malaysia, Serdang, Selangor, Malaysia
Keywords: Soil stabilization, Alkaline activation, Fly ash, Potassium hydroxide

Abstract

In this paper the potential of introducing alkali activated fly ash to a clayey soil as stabilizing agent was investigated. As alkaline activator Potassium hydroxide of 12 M was introduced to the soil fly ash mixtures. Unconfined compressive strength tests were carried out. Four different fly ash/solid ratios were proposed to be 10 %, 20 %, 30 % and 40 % at two curing regimes of 7 & 28 days. The greatest unconfined compressive strength was of 40 % mixture recorded at 3.68 Mpa after 28 days. Microstructural analyses including SEM, EDS and FTIR were conducted to detect and confirm gel formation. Alkaline activation of clayey soil using KOH solution as an activator proved to be a feasible alternative for soft soil stabilization.

Author Biographies

Ahmed Giuma Elkhebu, University Tun Hussein Malaysia, Department of Infrastructure and Geomatic Engineering, Barit Raaja, Johor, Malaysia
University Tun Hussein Malaysia, Faculty of civil & environmental Engineering, Depatrment of Infrastructure and Geomatic Engineering
Adnan Zainorabidin, University Tun Hussein Malaysia, Department of Infrastructure and Geomatic Engineering, Barit Raaja, Johor, Malaysia
University Tun Hussein Malaysia, Faculty of civil & environmental Engineering, Depatrment of Infrastructure and Geomatic Engineering
Huat B. K Bujang, Department of Civil Engineering, Faculty of Engineering, University Putra Malaysia, Serdang, Selangor, Malaysia
Department of Civil Engineering, Faculty of Engineering, University Putra Malaysia
Ismail Hj. Bakar, University Tun Hussein Malaysia, Department of Infrastructure and Geomatic Engineering, Barit Raaja, Johor, Malaysia
University Tun Hussein Malaysia, Faculty of civil & environmental Engineering, Depatrment of Infrastructure and Geomatic Engineering
Lokman Abdeljouad Abdeljouad, Department of Civil Engineering, Faculty of Engineering, University Putra Malaysia, Serdang, Selangor, Malaysia
Department of Civil Engineering, Faculty of Engineering, University Putra Malaysia
Wisam khalef Dheyab, Department of Civil Engineering, Faculty of Engineering, University Putra Malaysia, Serdang, Selangor, Malaysia
Department of Civil Engineering, Faculty of Engineering, University Putra Malaysia
Published
2019-01-01
How to Cite
Elkhebu, A. G., Zainorabidin, A., Bujang, H. B. K., Bakar, I. H., Abdeljouad, L. A., & Dheyab, W. khalef. (2019). Alkaline activation of clayey soil using Potassium hydroxide & Fly ash. International Journal of Integrated Engineering, 10(9). Retrieved from https://publisher.uthm.edu.my/ojs/index.php/ijie/article/view/2477