Sustainable green concrete: investigating the influence of recycled aggregates, polypropylene fibres, and nano clay additives on physical and mechanical properties

Pouria Baghaee Asadabadee, Babak Rouhi Broujeni and Amir Gholampour

International Journal of Environmental Technology and Management, 2024, vol. 27, issue 4/5/6, 265-278

Abstract: In this study, the eco-friendly concrete has been prepared by utilising construction and demolition (C&D) waste as aggregates. The effect of polypropylene fibre (PolyF) and nano clay (NC) were employed as additives. Subsequently, both were combined (PolyF-NC) to optimise the physical and mechanical properties of the green concrete (GC). Fourier transform infra-Red (FTIR), and scanning electron microscopy (SEM), were employed to analyse the morphology of the GC. At the optimised point, PolyF and NC revealed 76.7% and 82.5% increases in compressive strength, respectively. Additionally, PolyF improved the tensile strength 1.5 times compared to the reference sample. Lastly, the PolyF-NC increased the compressive and tensile strength by 12% and 2.1 times, respectively. Consequently, the mechanical properties enhanced by adding 1.8 kg/m³ NC and 9.45 kg/m³ PolyF to the GC. Based on results, using PolyF and NC additives enhances green concrete's physical properties with C&D waste aggregates.

Keywords: green concrete; recycled aggregates; additives; polypropylene fibres; nano clay. (search for similar items in EconPapers)
Date: 2024
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