Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Optimization of Ternary Binders Based on Flash-Calcined Sediments and Ground Granulated Blast Furnace slag Using a Mixture Design

Version 1 : Received: 14 September 2021 / Approved: 15 September 2021 / Online: 15 September 2021 (15:25:47 CEST)

How to cite: Zeraoui, A.; Maherzi, W.; Benzerzour, M.; Abriak, N. Optimization of Ternary Binders Based on Flash-Calcined Sediments and Ground Granulated Blast Furnace slag Using a Mixture Design. Preprints 2021, 2021090270 (doi: 10.20944/preprints202109.0270.v1). Zeraoui, A.; Maherzi, W.; Benzerzour, M.; Abriak, N. Optimization of Ternary Binders Based on Flash-Calcined Sediments and Ground Granulated Blast Furnace slag Using a Mixture Design. Preprints 2021, 2021090270 (doi: 10.20944/preprints202109.0270.v1).

Abstract

CO2 emissions resulting from the production of cement is a major issue, but can be limited by the partial substitution of cement by low-carbon-impact additions. The aim of this study was the formulation of a ternary binder based on ordinary Portland cement (OPC), ground granulated blast-furnace slag (GGBS) and flash-calcined sediment (FCS), a dredged waste which was valorized after applying a new heat treatment: flash calcination. The used materials were physically, chemically and mineralogically characterized. The composition of the formulations was optimized using mixture designs. Five formulations, one reference formulation RM (100% OPC), one binary formulation (50% OPC/50% GGBS), and three ternary formulations with a variable FCS rate (10%, 15%, 20%), were selected and characterized fresh and hardened. Results showed that the incorporation of FCS reduced the workability and increased the density. In addition, a decrease in the initial setting time and the heat of hydration peak were observed. In the hardened state, the formulation containing 10% FCS showed 90-day mechanical strengths superior to that of RM. The use of FCS in ternary binders could reduce the environmental impact by reducing greenhouse gas emissions.

Keywords

sediments; circular economy; cement; ternary eco-binders; flash calcination method; mixture design

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