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Imerys Technology Centre- Lyon, jennifer.astoveza@imerys

Imerys Technology Centre- Lyon, jennifer.astoveza@imerys.com. Jennifer ASTOVEZA. Industrial By-Products as Non-Conventional Supplementary Cementitious Material. Background. KU Leuven. ULorraine. Manila. ITC-Lyon. The SOCRATES Project. Project duration: 2016-2020

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Imerys Technology Centre- Lyon, jennifer.astoveza@imerys

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  1. Imerys Technology Centre- Lyon, jennifer.astoveza@imerys.com Jennifer ASTOVEZA Industrial By-Products as Non-Conventional Supplementary Cementitious Material

  2. Background KU Leuven ULorraine Manila ITC-Lyon

  3. The SOCRATES Project • Project duration: 2016-2020 • Partners: 7 universities, 7 companies • 15 early stage researchers (ESR) • 30 M jobs in Europe depends on supply of raw materials • Avoiding landfilling gives a high economic and environmental benefit

  4. The SOCRATES Project Calcium Aluminate Cements (CAC) Calcium Aluminate Cement (CAC) + Calcium Sulphate Hemihydrate (HH) + SOCRATES residues • High alumina cement (typically 32-45% Al2O3) • Main phase: CA • Special applications: • Self-levelling underlayment • Refractory • Aggressive enviroment • Properties: • Rapid strength development • Resistance to high temperature • Resistance to chemically aggressive conditions

  5. Why valorise in cements? Environmental Impact High volume valorisation with cement and concrete applications Future Projection Worrell, 2017 • Production of 1 tonne of clinker emits 0.9 tonne of CO2 • 60% from decarbonation of limestone, 40% from the process CaCO3 → CaO + CO2 Van Deventer, 2017

  6. The SOCRATES residues As non-conventional supplementary cementitious materials (SCM) • Challenges: • Most conventional SCM are fully used • Changes in energy sector and increased steel recyclying will further reduce available volumes of conventional SCM • Possibilities: • In the raw meal • As aggregate in concrete • As SCM in the dry mix

  7. Status of the Research Screening Test Compressive Strength Image Analysis Ex-situ Isothermal Calorimetry 30 wt.% granulated Fe-residue slag (GFS) 30 wt.% incorporation of SCM Then, same volume substitution for all other SCM Hydration Mechanism X-Ray Computed Tomography TEM SEM

  8. Exergy and Life Cycle Assessment Case Study Exergy*→ thermodynamic property measuring the entropy generated by a process or a material in a flowsheet 2nd law of thermodynamics: every real process implies an entropy creation All resources of the system are measured with the same units, kJ or kW. • *Abadías Llamas A, Valero Delgado A, Valero Capilla A, Torres Cuadra C, Hultgren M, Peltomäki M, Roine A, Stelter M and Reuter M A 2019 Simulation-based exergy, thermo-economic and environmental footprint analysis of primary copper production Min. Eng. 131 51–65

  9. Exergy and Life Cycle Assessment Exergy Cost Breakdown LCA Positive environmental and thermo-economic contribution of slag as SCM in cement production • Global Warming Potential (GWP) • Photochemical Ozone Formation (POCP) • Acidification Potential (AP) • Eutrophication Potential (EP)

  10. jennifer.astoveza@imerys.com Jennifer ASTOVEZA

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