Synthesis of Cardava Banana (Musa acuminata x balbisiana) Pseudostem Fiber - Silica Reinforced Composite as Concrete Additive

Abstract:

Cardava banana pseudostem fibers (BPFs) are recently explored as a composite reinforcement. This is due to its improved thermal and mechanical stability effects for concrete applications. Silica, derived from sodium silicate and a modification additive, was explored as potential matrix in the self-healing applications. Herein, BPFs were prepared to produce BPF – silica composite (BPFSC) as concrete additive. The investigation focused on the interfacial adhesion of BPFs in the silica matrix to self-heal the concrete when subjected to cracks. The synthesized BPFSC has a sheet-like and a rough surface morphology based on the SEM micrographs. BPFs (100 mesh) were used to reinforce silica, and the synthesized composite (BPFSC) was mixed in a cementitious matrix (5% w/w) to test its potential self-healing properties. Results showed that the addition of the silica (SiO₂) improved the mechanical properties of concrete in both the pristine condition and healed samples. Notably, the BPFSC showed better mechanical performance than SiO₂ alone. This explained the good interfacial adhesion of BPF in the BPF – silica matrix. Hence, the prepared composite embedded in concrete showed significant healing potential concerning compressive and tensile strengths after damage, surpassing control specimens. Finally, a synthesis procedure was developed to prepare cardava banana pseudostem fiber – silica composite, showing a potential upcycling route of waste pseudostems for construction materials.

• Periodical: Construction Technologies and Architecture (Volume 5)
• Pages: 11-18
• DOI: https://doi.org/10.4028/p-66yc8h
• Online since: April 2023
• Authors: Crijamaica l. Oceña*, Chosel P. Lawagon
• Keywords: Cardava Banana, Natural Fiber-Silica Composite, Self-Healing Concrete, Silica, Sodium Silicate

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