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<p>This feasibility study assesses the performance of compound eco-cement produced using cement CEMI (C) partially substituted by slag (S), from the recycled metal scraps, up to 25%. Recycling slag in cement would reduce the resource and energy consumption in the cement manufacturing process and optimize cement costs in the local context. Although, the slag tends to reduce the compressive strength of ordinary Portland cement (CEMI); by 17%, 19%, and 27% respectively for substitution rates of 15%, 20%, and 25% at 28&#xa0;days, it can still be used to produce compound cement; eventually at 90&#xa0;days. These cements would have improved workability due to the reduced water demand to normal consistency (water/binder ratio reduced by 8%) and increased slump of the mortar (18%). The present study shows that it is possible to produce compound cement using up to 15–20% slag; with lower carbon footprint in the context of Burkina Faso.</p> Graphical abstract <p></p>

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Towards the development of eco-cement containing furnace slag from the recycling of metal scraps into steel in Burkina Faso

  • 期刊论文

  • 发表日期：

    2025年6月26日

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  • Philbert Nshimiyimana,
  • Yawo Daniel Adufu,
  • Nafissatou Savadogo,
  • Kassoum Kanazoe,
  • Moumini Kindo,
  • Adamah Messan

摘要

This feasibility study assesses the performance of compound eco-cement produced using cement CEMI (C) partially substituted by slag (S), from the recycled metal scraps, up to 25%. Recycling slag in cement would reduce the resource and energy consumption in the cement manufacturing process and optimize cement costs in the local context. Although, the slag tends to reduce the compressive strength of ordinary Portland cement (CEMI); by 17%, 19%, and 27% respectively for substitution rates of 15%, 20%, and 25% at 28 days, it can still be used to produce compound cement; eventually at 90 days. These cements would have improved workability due to the reduced water demand to normal consistency (water/binder ratio reduced by 8%) and increased slump of the mortar (18%). The present study shows that it is possible to produce compound cement using up to 15–20% slag; with lower carbon footprint in the context of Burkina Faso.

Graphical abstract