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A Study on Strength Properties of Concrete with Replacement of Low C₃A Cement by Fly Ash



Author(s)

Kaoutar Bazzar and Adil Hafidi Alaoui

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DOI:10.17265/2161-6221/2021.1-3.002

Laboratory of Mechanical and Civil Engineering, Research Team in Materials and Structural Mechanics, Faculty of Sciences and Technology, Abdelmalek Essaadi University, Tangier 90000, Morocco

The chemical composition of cement has a crucial impact on the performance of concrete. Different brands of Portland cement are used for various construction works without prior knowledge of their performance. For economic and environmental reasons, the valorization of fly ash in concrete production has been increasingly studied. The aim of this study is to determine the mechanical performance of the cement in which hydrated cement has been injected, and to assess the environmental benefit of using the waste as a partial replacement. The experimental study consists of replacing cement, with high tricalcium aluminate (C₃A) content, with cement with low C₃A content. The obtained result shows that it is very feasible to valorize this material and to manufacture eco-environmental cement which has rheological and mechanical characteristics almost similar to or better than that of ordinary cement, where a resistance of 30 MPa has been obtained, after a substitution rate of 50%. The valorization by using cement with low C₃A content makes it possible to strengthen the material at a young age and leads to obtain more economical and less polluting cement.

Concrete, fly ash, Expansion, Portland cement, mechanical properties, C₃A.