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Effect of high temperature on the microstructural evolution of fiber reinforced geopolymer composite
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SYSNO ASEP 0512072 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Effect of high temperature on the microstructural evolution of fiber reinforced geopolymer composite Author(s) Samal, Sneha Manjaree (FZU-D) ORCID, RID Number of authors 1 Article number e01779 Source Title Heliyon. - : Elsevier - ISSN 2405-8440
Roč. 5, č. 5 (2019), s. 1-10Number of pages 10 s. Language eng - English Country GB - United Kingdom Keywords materials science ; cvil engineering ; mechanical engineering ; structural engineering Subject RIV JI - Composite Materials OECD category Composites (including laminates, reinforced plastics, cermets, combined natural and synthetic fibre fabrics Method of publishing Open access Institutional support FZU-D - RVO:68378271 UT WOS 000473561400204 EID SCOPUS 85066148420 DOI 10.1016/j.heliyon.2019.e01779 Annotation Physical evolution of geopolymeric minerals derived from metakaolin and synthesized with sodium, mixed-alkali and potassium activating solutions (Na- K) during thermal exposure. The geopolymer composites were prepared with 40 V% of fiber reinforcement such as carbon, E-glass, and basalt at the direction of in plain. Fiber reinforced geopolymer composites were exposed to the room and elevated temperatures inside the oven at air medium for a period of 30 min. The durability of the composites and internal structures with surface microstructures were examined after high temperature exposures. According to the results, geopolymer implied a prominent influence on the thermal shrinkage with the increasing of Si/Al ratios. This was attributed to the densification caused by reduction in porosity during dehydroxylation and sintering. In the case of carbon fiber reinforced composite shows transition in strength after 600 °C due to the oxide protective layer that increases the flexural strength and toughness of the composite. The flexural strength of the carbon reinforced composite increases from 17.8 to 55.8 MPa at 1000 °C. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2020 Electronic address http://hdl.handle.net/11104/0302282
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