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Sustainable Cement Paste Development Using Wheat Straw Ash and Silica Fume Replacement Model

Author

Listed:
  • Bryan Bastías

    (Department of Engineering Construction and Management and UC Concrete Innovation Center (CIHUC), Pontificia Universidad Católica de Chile, Santiago 8320165, Chile
    Centro Nacional de Excelencia para la Industria de la Madera (CENAMAD), Pontificia Universidad Católica de Chile, Santiago 8320165, Chile)

  • Marcelo González

    (Department of Engineering Construction and Management and UC Concrete Innovation Center (CIHUC), Pontificia Universidad Católica de Chile, Santiago 8320165, Chile)

  • Juan Rey-Rey

    (Faculty of Architecture, Universidade da Coruña, 15001 A Coruña, Spain)

  • Guillermo Valerio

    (Department of Engineering Construction and Management and UC Concrete Innovation Center (CIHUC), Pontificia Universidad Católica de Chile, Santiago 8320165, Chile)

  • Pablo Guindos

    (Centro Nacional de Excelencia para la Industria de la Madera (CENAMAD), Pontificia Universidad Católica de Chile, Santiago 8320165, Chile
    Faculty of Architecture, Universidade da Coruña, 15001 A Coruña, Spain
    Centro de Innovación Tecnolóxica en Edificación e Enxeñería Civil (CITEEC), Universidade da Coruña, 15001 A Coruña, Spain)

Abstract

Conventional cement production is a major source of carbon dioxide emissions, which creates a significant environmental challenge. This research addresses the problem of how to reduce the carbon footprint of cement paste production using agricultural and industrial waste by-products, namely wheat straw ash (WSA) and silica fume (SF). Currently, accurate models that can predict the mechanical properties of cement pastes incorporating these waste materials are lacking. To fill this gap, our study proposes a model based on response surface methodology and Box-Behnken design, designed to predict the strength of cement pastes with partial substitutions of WSA and SF. Through mechanical and characterization tests, the model demonstrated high accuracy in predicting the strength of the pastes, validated with three mixes, which showed maximum errors of less than 6% at different ages (7, 28, and 56 days). Response surface analysis revealed that replacing cement with 0–20% WSA and more than 5% SF can effectively reduce the carbon footprint by maximizing waste incorporation. This model allows for the calculation of optimal cement substitution levels based on the required strength, thus promoting sustainability in the construction industry through the use of local waste/resources.

Suggested Citation

  • Bryan Bastías & Marcelo González & Juan Rey-Rey & Guillermo Valerio & Pablo Guindos, 2024. "Sustainable Cement Paste Development Using Wheat Straw Ash and Silica Fume Replacement Model," Sustainability, MDPI, vol. 16(24), pages 1-22, December.
    • Handle: RePEc:gam:jsusta:v:16:y:2024:i:24:p:11226-:d:1549196
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    References listed on IDEAS

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    1. Muhammad Nasir Amin & Tariq Murtaza & Khan Shahzada & Kaffayatullah Khan & Muhammad Adil, 2019. "Pozzolanic Potential and Mechanical Performance of Wheat Straw Ash Incorporated Sustainable Concrete," Sustainability, MDPI, vol. 11(2), pages 1-20, January.
    Full references (including those not matched with items on IDEAS)

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