Hemp Fiber Reinforced Red Mud/Fly Ash Geopolymer Composite Materials: Effect of Fiber Content on Mechanical Strength

Taye E, Roether J, Schubert DW, Redda DT, Boccaccini AR (2021)

Publication Language: English

Publication Type: Journal article, Review article

Publication year: 2021

Journal

Materials MDPI

Book Volume: 14

Article Number: 511

Journal Issue: 3

URI: https://www.mdpi.com/1996-1944/14/3/511

DOI: 10.3390/ma14030511

Open Access Link: https://www.mdpi.com/1996-1944/14/3/511

Abstract

Novel hemp fiber reinforced geopolymer composites were fabricated. The matrix was a new geopolymer based on a mixture of red mud and fly ash. Chopped, randomly oriented hemp fibers were used as reinforcement. The mechanical properties of the geopolymer composite, such as diametral tensile (DTS) (or Brazilian tensile) strength and compressive strength (CS), were measured. The geopolymer composites reinforced with 9 vol.% and 3 vol.% hemp fiber yielded average DTS values of 5.5 MPa and average CS values of 40 MPa. Scanning electron microscopy (SEM) studies were carried out to evaluate the microstructure and fracture surfaces of the composites. The results indicated that the addition of hemp fiber is a promising approach to improve the mechanical strength as well as to modify the failure mechanism of the geopolymer, which changed from brittle to “pseudo-ductile.

Authors with CRIS profile

Eyerusalem Taye Lehrstuhl für Werkstoffwissenschaften (Biomaterialien) Judith Roether Lehrstuhl für Werkstoffwissenschaften (Polymerwerkstoffe) (LSP) Dirk Schubert Lehrstuhl für Werkstoffwissenschaften (Polymerwerkstoffe) (LSP) Aldo Boccaccini Lehrstuhl für Werkstoffwissenschaften (Biomaterialien)

Involved external institutions

Addis Ababa University (AAU) ET Ethiopia (ET)

How to cite

APA:

Taye, E., Roether, J., Schubert, D.W., Redda, D.T., & Boccaccini, A.R. (2021). Hemp Fiber Reinforced Red Mud/Fly Ash Geopolymer Composite Materials: Effect of Fiber Content on Mechanical Strength. Materials, 14(3). https://doi.org/10.3390/ma14030511

MLA:

Taye, Eyerusalem, et al. "Hemp Fiber Reinforced Red Mud/Fly Ash Geopolymer Composite Materials: Effect of Fiber Content on Mechanical Strength." Materials 14.3 (2021).

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