Flexural properties loss of unidirectional epoxy/fique composites immersed in water and alkaline medium for construction application |
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| Authors: | Catalina Gómez Hoyos Analía Vázquez |
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| Affiliation: | 1. Natural Composites Research Group Lab, Department of Materials and Production Engineering, The Sirindhorn International Thai-German Graduate School of Engineering (TGGS), King Mongkut’s University of Technology North Bangkok (KMUTNB), Bangsue, Bangkok, Thailand;2. Government Women’s Polytechnic College, Calicut, Kerala, India;3. Department of Chemistry, Dayananda Sagar College of Engineering, Bengaluru, India;4. Department of Science, Faculty of Science & Technology, Alliance University, Bengaluru, Karnataka, India |
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| Abstract: | Epoxy fique composites were evaluated for construction applications and compared with conventional wood used in construction. The composites studied were made with fique fibers treated using Na(OH) solution at 18 w/v%, untreated fique fibers were also used. The matrices were epoxy and epoxy with 5 wt.% of chemically modified C30B montmorillonite. Unidirectional composites of 90 mm × 20 mm × 4 mm were elaborated by pultrusion processing technique. The flexural properties loss occurred over 20 days of composites submitted to three types of environments: (i) water, (ii) saturated calcium hydroxide solution and (iii) mortar with w/c ratio of 0.45 and 540 kg/m3 of cement, cured in a saturated solution of lime stone at 50 °C. Results showed that fiber treatment and montmorillonite addition improved the flexural modulus and strength of composites in 40% and 34% respectively. Moreover the flexural properties of composites before and after ageing resulted comparable or even better than conventional wood used in construction. |
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