Investigating the effect of sludge cake and wastewater treatment plants on the parameters of clay soils by numerical method

Document Type : Research Article

Authors

1 Department of Civil Engineering, Tafresh University, Tafresh 39518 79611, Iran

2 Civil Eng.Department- Tafresh uni. Tafresh-Iran

10.22060/ceej.2026.23194.8126

Abstract

With the expansion of urbanization and the increase in population, water consumption also increases, which leads to an increase in sewage production and the production of waste materials in the form of sludge cake. The purpose of this study is to investigate the effect of sludge cake and wastewater treatment plants on the parameters of clay soils. To accurately evaluate the effect of using sludge cake on the bearing capacity of the foundation, as well as the effect of the curing period on the composition of the sludge cake and clay of the foundation bed, sixteen different conditions were investigated. According to the presented results, it can be seen that in both processing periods, with the increase in the amount of sludge cake in the soil, the bearing capacity of the foundation has also increased, in other words, the parameter of the percentage of sludge cake in the clay bed of the foundation compared to the processing period. It has a much greater impact on the bearing capacity of the foundation. On the other hand, increasing the processing time did not have a significant effect on the examined parameters. Also, the evaluation of the results shows that the combination of 14% of sludge with the clay of the foundation bed has led to the greatest increase in the bearing capacity of the foundation among other percentages of combinations, which can be introduced as the optimal percentage.

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Amirkabir Journal of Civil Engineering
Volume 57, Issue 9
in progress
December 2025

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