Development and characterization of lightweight geopolymer composite reinforced with hybrid carbon and steel
Authors:
- Agnieszka Baziak,
- Kinga Pławecka,
- Izabela Hager,
- Arnaud Castel,
- Kinga Korniejenko
Abstract
The aim of this paper is to analyze the influence of hybrid fiber reinforcement on the properties of a lightweight fly ash-based geopolymer. The matrix includes the ratio of fly ash and microspheres at 1:1. Carbon and steel fibers have been chosen due to their high mechanical properties as reinforcement. Short steel fibers (SFs) and/or carbon fibers (CFs) were used as reinforcement in the following proportions: 2.0% wt. CFs, 1.5% wt. CFs and 0.5% wt. SFs, 1.0% wt. CFs and 1.0% wt. SFs, 0.5% wt. CFs and 1.5% wt. SFs and 2.0% wt. SFs. Hybrid reinforcement of geopolymer composites was used to obtain optimal strength properties, i.e., compressive strength due to steel fiber and bending strength due to carbon fibers. Additionally, reference samples consisting of the geopolymer matrix material itself. After the production of geopolymer composites, their density was examined, and the structure (using scanning electron microscopy) and mechanical properties (i.e., bending and compressive strength) in relation to the type and amount of reinforcement. In addition, to determine the thermal insulation properties of the geopolymer matrix, its thermal conductivity coefficient was determined. The results show that the addition of fiber improved compressive and bending strength. The best compressive strength is obtained for a steel fiber-reinforced composite (2.0% wt.). The best bending strength is obtained for the hybrid reinforced composite: 1.5% wt. CFs and 0.5% wt. SFs. The geopolymer composite is characterized by low thermal conductivity (0.18–0.22 W/m ∙ K) at low density (0.89–0.93 g/cm3).
- Record ID
- CUT2c619938f7a041ea9953d4ebd29d3fbc
- Publication categories
- ;
- Author
- Journal series
- Materials, ISSN , e-ISSN 1996-1944, Biweekly
- Issue year
- 2021
- Vol
- 14
- No
- 19
- Pages
- [1-16]
- Article number
- 5741
- Other elements of collation
- fot.; rys.; tab.; wykr.; Bibliografia (na s.) - 14-16; Bibliografia (liczba pozycji) - 53; Oznaczenie streszczenia - Abstr.; Numeracja w czasopiśmie - Vol. 14, Iss. 19
- Substantive notes
- This article belongs to the Topic: Multiple Application for Novel and Advanced Materials
- Keywords in English
- geopolymer composite, lightweight composite, hybrid reinforcement, cenosphere, microsphere, steel fiber, carbon fiber
- DOI
- DOI:10.3390/ma14195741 Opening in a new tab
- URL
- https://www.mdpi.com/1996-1944/14/19/5741/htm Opening in a new tab
- Related project
- E-mobilność oraz zrównoważone materiały i technologie. . Project leader at PK: , ,
- Pianki geopolimerowe o niskiej przewodności cieplnej wytwarzane na bazie odpadów przemysłowych jako innowacyjny materiał dla gospodarki o obiegu zamkniętym. . Project leader at PK: , ,
Projects financed by NCRD [Projekty finansowane przez NCBiR (NCBR (]
- E-mobilność oraz zrównoważone materiały i technologie. . Project leader at PK: , ,
- Language
- eng (en) English
- License
- Score (nominal)
- 140
- Publication indicators
- Additional fields
- Indeksowana w: Web of Science, Scopus
- Uniform Resource Identifier
- https://cris.pk.edu.pl/info/article/CUT2c619938f7a041ea9953d4ebd29d3fbc/
- URN
urn:pkr-prod:CUT2c619938f7a041ea9953d4ebd29d3fbc
* presented citation count is obtained through Internet information analysis, and it is close to the number calculated by the Publish or PerishOpening in a new tab system.