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Potassium‐Based Geopolymer Composites Reinforced with Chopped Bamboo Fibers
Author(s) -
Sankar Kaushik,
Sá Ribeiro Ruy A.,
Sá Ribeiro Marilene G.,
Kriven Waltraud M.
Publication year - 2017
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.14542
Subject(s) - metakaolin , geopolymer , bamboo , materials science , composite material , flexural strength , ultimate tensile strength , microstructure , scanning electron microscope , composite number , compressive strength
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.