Influence of calcined sediment inputs on the mechanical behavior of fiber-reinforced concrete in an aggressive environment

Abstract

Dredged sediments and granite waste seriously threaten the environment and the oceans. In this work, we evaluated the Fergoug dam deposits as mineral materials for partially replacing Portland cement. The sediments were fired in a convection kiln at 450 degrees Celsius. This study aims to discover a sustainable cementitious material extracted from recycling residual sediments and granite, which can be an alternative to metakaolin (MK), usually used to reinforce cement compositions. Three concrete formations partially replaced Portland cement (CEM I 42.5 N). The first content was applied at 10% calcined sediment (CS), the second was 10% granite powder (GP), and the third was a mixture of 5% CS and 5% GP. Formations are detected and compared to vibrating concrete by placing them in aggressive media such as sulfuric acid and seawater solutions and evaluating their compressive strength and weight loss properties. SCCCSGP showed similar durability performance to the CV reference mix, including weight loss and electrical resistance. At the same time, using 10% CS gave good results regarding compressive strength and mass loss compared with using 10% GP alone. As for aggressive media, the results presented for the seawater solution were less aggressive than those of the sulfuric acid solution.