Impact of the vase's addition on the mechanical characteristics and durability of concrete against H2SO4 attack: A numerical and experimental study

Dredging is an essential part of dam operation; the amount of silt that is removed and dumped downstream of the dam can pollute rural areas for a long time. The value of these vases following the dredging of dams, in this case the Chorfa dam, is of interest to this study. This study is a part of a larger research project that aims to help economically optimize and value formulations that are simple to implement and allow the use of dredged materials in the formulation of ordinary concretes by substituting 10%, 20%, and 30% of cement with dredged sediments after they have been calcined at 750 oC to make them active. To evaluate their properties, tests were conducted on vibrated concrete in both its fresh and hardened states (compressive strengths and durability of concrete exposed to sulfuric acid attack). According to the results, it is possible to create concretes that satisfy economic, ecological, and technological goals by incorporating up to 30% calcined silt. To better understand the deterioration mechanism of each concrete mix, scanning electron microscope (SEM) was used. The study's second component uses the finite element method to construct a numerical model for accuracy and efficacy. Additionally, manufacturing trials are planned using computer simulations that account for labor, materials, testing, and time. The nonlinear stress-strain relationship for time-dependent concrete deformations and tension cracks presents a challenge to concrete modeling.