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Evaluation of Mechanical Characteristics of Cement Mortar with Fine Recycled Concrete Aggregates (FRCA)

Author

Listed:
  • Rebeca Martínez-García

    (Department of Mining Technology, Topography and Structures, University of León, Campus de Vegazana s/n, 24071 León, Spain)

  • María Isabel Sánchez de Rojas

    (Eduardo Torroja Institute for Construction Science, UEX-CSIC Partnering Unit, C/ Serrano Galvache, 28033 Madrid, Spain)

  • Julia Mª. Morán-del Pozo

    (Department of Agricultural Engineering and Sciences, University of León, 24071 Léon, Spain)

  • Fernando J. Fraile-Fernández

    (Department of Mining Technology, Topography and Structures, University of León, Campus de Vegazana s/n, 24071 León, Spain)

  • Andrés Juan-Valdés

    (Department of Agricultural Engineering and Sciences, University of León, 24071 Léon, Spain)

Abstract

One of the growing demands in concrete manufacture is the availability of natural fine aggregates, which account for 35% to 45% of the total concrete. An alternative method of disposal of fine recycled concrete aggregates (FRCA) generated from demolition and construction waste (C&DW) is their usage in mortar and the development of recycled mortar. The main aim of this research work is to evaluate the viability of incorporating FRCA from urban C&DW for the manufacture of cement-based mortars. Simple processing techniques like washing and sieving are adopted to improve the FRCA quality. Physical and chemical characterization of ingredients is carried out. In total four mixes of 1:3 (cement: sand) mortar with partial replacement of normalized sand with FRCA (0%, 25%, 50%, and 100%) are evaluated for mechanical properties. Water to cement ratio for all four mortar mixes are determined by fixed consistency. Mechanical and physical properties like density, compressive strength, and flexural strength are studied for various curing periods, and the result is that the optimum usage of FRCA is 25% based on a 90-day curing period.

Suggested Citation

  • Rebeca Martínez-García & María Isabel Sánchez de Rojas & Julia Mª. Morán-del Pozo & Fernando J. Fraile-Fernández & Andrés Juan-Valdés, 2021. "Evaluation of Mechanical Characteristics of Cement Mortar with Fine Recycled Concrete Aggregates (FRCA)," Sustainability, MDPI, vol. 13(1), pages 1-23, January.
    • Handle: RePEc:gam:jsusta:v:13:y:2021:i:1:p:414-:d:474847
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    References listed on IDEAS

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    1. Pacheco-Torgal, F., 2017. "High tech startup creation for energy efficient built environment," Renewable and Sustainable Energy Reviews, Elsevier, vol. 71(C), pages 618-629.
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