Sustainable geopolymer composites reinforced with flax tows

Lazorenko, Georgy; Kasprzhitskii, Anton; Kruglikov, Alexander; Mischinenko, Vasilii; Yavna, V. A.

doi:10.1016/j.ceramint.2020.01.184

Cited by 42 publications

(23 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…All this studies confirmed that the addition of flax fibres between 4 and 10% by mass increased the mechanical properties of the composites. Other research shows that a lower amount of reinforcement (0.25-1.0% by mass) also positively influences the mechanical properties, especially the flexural strength of the geopolymer fly ash-based composites [25]. The mechanism of reinforcement could be related to the kind of flax fibres used [18,26].…”

Section: Discussionmentioning

confidence: 99%

The influence of fibre pre-treatment on the mechanical properties of the geopolymer composites

et al. 2020

View full text Add to dashboard Cite

This article aims to analyse the long-term influence of the pre- treatment method on mechanical properties such as the compressive strength of geopolymer composites reinforced with short natural fibres (length of around 5 mm). This paper presents the behaviour of sodium activator-synthesised fly ash geopolymer containing natural fibres at ambient temperatures. Fly ash from the Skawina coal power plant (located in: Skawina, Lesser Poland, Poland) was used as a raw material. The chemical composition of the fly ash was typical for class F. The article evaluated the methods of pre-treatment of the fibres on the mechanical properties of the geopolymer composites. It compares the plain specimens and composites with fibres pre-treated in water and alkali solutions as well as with fibres without any pre-treatment. The fibres were added at the amount of 1% by weight. The investigation was made by visual analysis and the testing of mechanical properties (compressive and flexural strength at ambient temperature) after 6 months. The achieved results do not confirm the positive influence of the fibre pre-treatment on the mechanical properties of the composites.

show abstract

Section: Discussionmentioning

confidence: 99%

The influence of fibre pre-treatment on the mechanical properties of the geopolymer composites

et al. 2020

View full text Add to dashboard Cite

show abstract

“…They are most effective when the load applied to the material is parallel to the interface, that is, the shear strength must be considered [ 63 ]. On the other hand, when the interface is subjected to tensional forces that act perpendicularly, the material strength is very likely to be low, unless there are many angled recesses [ 64 ]. Due to these factors, composite materials are considered anisotropic.…”

Section: Interface Between Fiber-matrixmentioning

confidence: 99%

“…When electrostatic adhesion between matrix and reinforcement occurs, one surface is positively charged while the other is negatively charged ( Figure 2 b). This generates an electrostatic attraction between the composite components that will depend on the difference in charges on their surfaces [ 64 ]. Electrostatic interactions are short-range and therefore only effective over small distances, on the order of atomic dimensions [ 65 ].…”

Section: Interface Between Fiber-matrixmentioning

confidence: 99%

“…Lazorenko et al [ 64 ] studied the effects of incorporating untreated flax fibers into fly ash-based geopolymer matrices. For this, samples were produced containing 0.25%, 0.50%, 0.75%, and 1% of waste.…”

Section: Surface Treatment Of Natural Fibersmentioning

confidence: 99%

“…However, the compressive strength test showed the negative effect that the insertion of the fiber produced in the composite, given the drop in strength from 44MPa in the reference sample to 32.5MPa in the sample with 1% fiber. The authors associated this behavior with the possible low fiber–matrix adhesion of the composite, or even the low fiber resistance to loading [ 64 , 85 ].…”

Section: Surface Treatment Of Natural Fibersmentioning

confidence: 99%

See 2 more Smart Citations

Natural Fibers as an Alternative to Synthetic Fibers in Reinforcement of Geopolymer Matrices: A Comparative Review

Azevedo¹,

Cruz²,

Marvila³

et al. 2021

Polymers

103

View full text Add to dashboard Cite

Geopolymer materials have been gaining ground in the civil construction sector not only for having superior physical properties when compared to conventional cement, but also for being less harmful to the environment, since the synthesis of the geopolymer does not release toxic gases or require high energy costs. On the other hand, geopolymer materials like cementitious matrices have low flexural strength and have fragile breakage. To overcome these deficiencies, the insertion of fibers in geopolymeric matrices has been evaluated as a solution. Although most research on this practice focuses on the use of synthetic fibers, the use of natural fibers has been growing and brings as an advantage the possibility of producing an even more ecological material, satisfying the need to create eco-friendly materials that exists today in society. Thus, this paper aimed to, through the evaluation of research available in the literature, understand the behavior of fibers in geopolymer matrices, identify similarities and differences between the performance of geopolymer composites reinforced with natural and synthetic fibers and, understanding that it is possible, point out ways to optimize the performance of these composites.

show abstract

Mechanical properties and durability of fiber reinforced geopolymer composites: A review on recent progress

Qin,

Yan,

Zhou

et al. 2023

Engineering Reports

View full text Add to dashboard Cite

Geopolymer concrete has similar mechanical properties to ordinary Portland cement (OPC) concrete, and even better properties in high temperature, high corrosion environment. However, geopolymer still has the disadvantages of large shrinkage and high brittleness, which greatly limit its application. Fiber reinforcement is widely used in various geopolymer systems to overcome the brittleness issue, but still retains the high strength. Over the past 10 years, great progress has been made in the research of fiber reinforced geopolymers in the aspect of toughening efficiency and durability improvement. Many studies have been conducted on fiber reinforced geopolymers, but there are still few systematic summaries on the addition of inorganic fibers and organic fibers to geopolymers. What is more there are many novel studies such as the application of geopolymers to 3D printing and the new concept of fiber factor have not been reviewed. In this paper, inorganic fibers, natural fibers and synthetic fibers in geopolymers are briefly reviewed, and their specific effects on geopolymers' compressive, flexural, tensile strength, fracture toughness, shear strength and durability such as shrinkage, chemical resistance, freeze–thaw resistance are reviewed. The current understanding of bonding mechanism and fiber‐geopolymer interface are also discussed, and related knowledge gaps and future work challenges are correspondingly pointed out.

show abstract

Sustainable geopolymer composites reinforced with flax tows

Cited by 42 publications

References 24 publications

The influence of fibre pre-treatment on the mechanical properties of the geopolymer composites

The influence of fibre pre-treatment on the mechanical properties of the geopolymer composites

Natural Fibers as an Alternative to Synthetic Fibers in Reinforcement of Geopolymer Matrices: A Comparative Review

Mechanical properties and durability of fiber reinforced geopolymer composites: A review on recent progress

Contact Info

Product

Resources

About