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Sustainable Soil-Compacted Blocks Containing Blast Furnace Slag (BFS) Activated with Olive Stone BIOMASS Ash (OBA)

Author

Listed:
  • Jordi Payá

    (Grupo de Investigación en Química de los Materiales (GIQUIMA), Instituto de Ciencia y Tecnología del Hormigón (ICITECH), Universitat Politècnica de València (UPV), 46022 Valencia, Spain)

  • José Monzó

    (Grupo de Investigación en Química de los Materiales (GIQUIMA), Instituto de Ciencia y Tecnología del Hormigón (ICITECH), Universitat Politècnica de València (UPV), 46022 Valencia, Spain)

  • Josefa Roselló

    (Departamento de Ecosistemas Agroforestales, Universitat Politècnica de Valéncia (UPV), 46022 Valencia, Spain)

  • María Victoria Borrachero

    (Grupo de Investigación en Química de los Materiales (GIQUIMA), Instituto de Ciencia y Tecnología del Hormigón (ICITECH), Universitat Politècnica de València (UPV), 46022 Valencia, Spain)

  • Alba Font

    (Grupo de Investigación en Química de los Materiales (GIQUIMA), Instituto de Ciencia y Tecnología del Hormigón (ICITECH), Universitat Politècnica de València (UPV), 46022 Valencia, Spain)

  • Lourdes Soriano

    (Grupo de Investigación en Química de los Materiales (GIQUIMA), Instituto de Ciencia y Tecnología del Hormigón (ICITECH), Universitat Politècnica de València (UPV), 46022 Valencia, Spain)

Abstract

Soil stabilization using cementing materials is a well-known procedure for earth-based building blocks preparation. For the selected binding materials, innovation usually focuses on low carbon systems, many of which are based on alkaline activation. In the present paper, blast furnace slag (BFS) is used as a mineral precursor, and the innovative alkali activator was olive stone biomass ash (OBA). This means that the most important component in CO 2 emissions terms, which is the alkali activator, has been replaced with a greener alternative: OBA. The OBA/BFS mixture was used to prepare compacted dolomitic soil blocks. These specimens were mechanically characterized by compression, and water strength coefficient and water absorption were assessed. The microstructure of blocks and the formation of cementing hydrates were analyzed by field emission scanning electron microscopy and thermogravimetry, respectively. The final compressive strength of the 120-day cured blocks was 27.8 MPa. It was concluded that OBA is a sustainable alkali activator alternative for producing BFS-stabilized soil-compacted blocks: CO 2 emissions were 3.3 kgCO 2 /ton of stabilized soil, which is 96% less than that for ordinary Portland cement (OPC) stabilization.

Suggested Citation

  • Jordi Payá & José Monzó & Josefa Roselló & María Victoria Borrachero & Alba Font & Lourdes Soriano, 2020. "Sustainable Soil-Compacted Blocks Containing Blast Furnace Slag (BFS) Activated with Olive Stone BIOMASS Ash (OBA)," Sustainability, MDPI, vol. 12(23), pages 1-14, November.
    • Handle: RePEc:gam:jsusta:v:12:y:2020:i:23:p:9824-:d:450349
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    References listed on IDEAS

    as
    1. Ramadhan W. Salim & Julius M. Ndambuki & David A. Adedokun, 2014. "Improving the Bearing Strength of Sandy Loam Soil Compressed Earth Block Bricks Using Sugercane Bagasse Ash," Sustainability, MDPI, vol. 6(6), pages 1-11, June.
    2. Martin Sisol & Dušan Kudelas & Michal Marcin & Tomáš Holub & Peter Varga, 2019. "Statistical Evaluation of Mechanical Properties of Slag Based Alkali-Activated Material," Sustainability, MDPI, vol. 11(21), pages 1-11, October.
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