Title : Preparation and characterization of eco-friendly composite based on geopolymer and reinforced with Washingtonia Filifera palm fibers
Abstract:
The development of sustainable materials has become a pivotal focus in addressing environmental concerns and advancing green construction technologies. Geopolymers present a promising eco-friendly alternative to traditional cementitious materials, primarily due to their reduced CO2 footprint, low-temperature processing, and the use of by-products as precursors, which prevents waste accumulation in landfills. However, geopolymers display a quasi-brittle behavior, meaning they tend to fracture suddenly under tensile stress, posing challenges and limitations for structural design. This weakness can be mitigated by using natural fibers as reinforcements in composites. Natural fibers have gained importance due to their abundant availability, low cost, recyclability, and low density. The purpose of this study is to investigate the potential of developing novel geopolymer composite (GPC) materials utilizing brick waste (BW) as an aluminosilicate precursor for the geopolymer matrix and reinforcing it with abundant Washingtonia Filifera palm fibers (WFFs). Specifically, the study examines the effect of different chemical treatments (alkaline and combined alkaline-silane) on the morphology, structure and tensile strength of WFFs, with the aim of optimizing interfacial adhesion between the fibers and geopolymer matrix. The optimum treated WFFs was then added to the mixture at 0, 1, 2, and 3% by weight of matrix. Pull-out test and compressive strength were conducted to investigate the influence of fibers on mechanical properties. The bulk density, apparent porosity, water absorption, and thermal conductivity were studied to examine the physical properties of geopolymer composites. Additionally, X-Ray Diffraction (XRD) and Scanning Electron Microscopy (SEM) analyses were performed. The structural analysis revealed that the addition of WFFs does not influence the mineralogy of geopolymer composites. Furthermore, the results show that the addition of fibers improved the strength characteristics of geopolymer composites. It is also found that the porosity and water absorption increase with the increase in fiber content, while the bulk density and thermal conductivity are reduced. Overall, to address the demand for eco-friendly and sustainable materials, it can be stated that Washingtonia Filifera fibers-reinforced geopolymers offer a promising solution with improved mechanical and thermal insulation properties for construction purposes.
Keywords: Washingtonia Filifera fibers, Natural fibers, Alkali-silane treatments, Reinforcement, Geopolymer composites;
Audience Take Away Notes:
- The audience will learn about the potential of abundant Washingtonia Filifera palm fibers as a sustainable reinforcement material in composites and the effect of the various chemical treatments used to enhance the properties of natural fibers for improved composite performance
- If the public is working to develop sustainable materials, the research findings will enable them to benefit from natural fiber reinforcements to enhance the properties of geopolymers leading to more sustainable and efficient building materials
- The research can be used to explore new natural fibers and composite formulations, enhancing both research and teaching
- The study offers an alternative material that simplifies design processes through enhanced properties, potentially reducing the need for additional structural supports
- The other benefits of this research include: - Contribution to sustainability: By utilizing geopolymer and recyclable natural fibers, the study promotes eco-friendly materials and reduces the reliance on traditional cementitious materials - Industry advancement: The research can drive innovation in the field of geopolymer processing and composite materials, contributing to advancements in manufacturing techniques and product development - Economic impact: With the potential for a more efficient and sustainable material, industries can benefit from cost savings and reduced environmental impact, leading to a positive economic outcome
