Cementitious Composites Containing Multifunctional Sugarcane Fibres

Viviane Guilarduci (Núcleo de Ambiente, Saúde e Segurança, IF Sudeste MG, São João del-Rei, Brazil.)
Patrícia Martelli (Department of Natural Sciences – DCNAT, Federal University of São João Del-Rei - UFSJ, Brazil)
Honória Gorgulho (Department of Natural Sciences – DCNAT, Federal University of São João Del-Rei - UFSJ, Brazil.)
Pablo Oliveira (Centre for Innovation and Technology in Composite Materials – CITeC, Department of Mechanical Engineering, Federal University of São João Del-Rei - UFSJ, Brazil.)
Tulio Hallak Panzera (Centre for Innovation & Technology in Composites, Department of Mechanical Engineering, Federal University of São João del Rei - UFSJ)

Abstract


This work investigates the reuse of natural (SCB) and aminopropyltriethoxysilane-modified (MSCB) sugarcane bagasse fibres in cementitious composites. Sugarcane bagasse fibres are pre-used in the treatment of motor oil contaminated effluents. A full factorial design is used to identify the effects of fibre type (SCB and MSCB), fibre length (0.6 and 1.2 mm), fibre amount (1 and 2 wt%) and fibre condition (before and after oil filtration) on apparent density, water absorption, apparent porosity, ultra-pulse velocity, dynamic modulus, flexural strength and modulus. SCB fibres lead to increased apparent density compared to MSCB fibre reinforced composites. MSCB fibres contribute to reduce composite porosity, leading to higher mechanical properties. The smaller area of MSCB fibres promotes a larger amount of cementitious phase per unit volume, thus increasing the strength of the sample. Longer sugarcane fibres (1.2 mm) have a larger surface area, leading to a higher fibre concentration per unit volume, which increases water absorption. The amount of fibre has no significant effect on mechanical and physical responses. Composites made with 2 wt% 0.6 mm long MSCB fibres achieve promising results for non-structural civil engineering applications.


Keywords


Sugarcane bagasse; Treatment of effluents; Chemical treatment, Cementitious composites; Mechanical properties; Non-destructive test; Design of experiment

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References


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DOI: https://doi.org/10.30564/jbms.v1i2.1216

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