Journal
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
Volume 100, Issue 1, Pages 49-55Publisher
WILEY
DOI: 10.1111/jace.14542
Keywords
composites; fibers; geopolymers; kaolinite; potassium
Categories
Funding
- CNPq-Conselho Nacional de Desenvolvimento Cientifico e Tecnologico-Brazil
- Air Force Office of Scientific Research [FA 9550-06-1-0221]
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Bamboo is a fast-growing, readily available natural material with tensile specific strength equivalent to that of steel (250-625 MPa/g/cm(3)). In the pursuit of sustainable construction materials, a composite was made with potassium polysialate siloxo geopolymer as the matrix and randomly oriented chopped bamboo fibers (Guadua angustifolia) from the Amazon region as the reinforcement. Four-point flexural strength testing of the geopolymer composite reinforced with bamboo fibers was carried out according to ASTM standard C78/C78M-10(e1). Potassium-based metakaolin geopolymer reinforced with 5 wt% (8 vol%) untreated bamboo fibers yielded 7.5 MPa four-point flexural strength. Scanning electron microscopy and optical microscopy were used to investigate the microstructure. In addition, X-ray diffraction was used to confirm the formation of geopolymer.
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