Sustainable green concrete: investigating the influence of recycled aggregates, polypropylene fibres, and nano clay additives on physical and mechanical properties
by Pouria Baghaee Asadabadee; Babak Rouhi Broujeni; Amir Gholampour
International Journal of Environmental Technology and Management (IJETM), Vol. 27, No. 4/5/6, 2024

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.

Online publication date: Mon, 15-Jul-2024

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