Civil and Project

Laboratory Investigation of the Effects of Catalytic Waste on the Engineering Properties of Gypseous Soils

https://doi.org/10.22034/cpj.2025.545716.1399
Volume 7, Issue 9 - Serial Number 89
December 2025
Civil and Project

Document Type : Research Article

Authors

farhad yavari 1
ebrahim nohani 2
hamidreza Holakoei 3

1 M.Sc. in Civil Engineering – Geotechnical Engineerin, Jahad University Khuzestan, Ahvaz, Iran.

2 Department of Civil Engineering, Materials and Energy Research Center, Dez.C., Islamic Azad University, Dezful, Iran.

3 Assistant Professor, Department of Civil Engineering, ACECR Khouzestan Institute of Higher Education, Ahvaz, Iran.

Abstract
The objective of the present study is to investigate the effect of catalyst waste on the engineering parameters of gypseous soil. To achieve this goal, standard geotechnical laboratory tests—namely unconfined compression, direct shear, and consolidation tests—were conducted and interpreted. After analyzing the results obtained from testing gypseous soil (containing 20% gypsum powder) treated with catalyst waste, it was observed that the use of catalyst waste is not particularly suitable in cases where improvement of shear behavior is desired. In fact, it may lead to a reduction of more than 60% in shear strength parameters and negatively affect failure characteristics. However, in scenarios where the confined behavior of soil (such as settlement issues) is of primary concern, the use of catalyst waste proved to be effective, resulting in a reduction of over 50% in the soil's volumetric compressibility coefficient. Therefore, it can be concluded that catalyst waste—at least in this specific context—cannot be regarded as a comprehensive solution for the improvement of gypseous soils, although its localized beneficial effects are undeniable.

Keywords

Gypseous soil
Catalyst waste
Soil
Strength parameters
Subjects
  • Receive Date 07 August 2025
  • Revise Date 05 September 2025
  • Accept Date 13 September 2025
  • First Publish Date 13 September 2025
  • Publish Date 22 November 2025

Home

Submit

Contact Us