Mechanical Properties of Wood Fiber Reinforced Geopolymer Composites with Sand Addition

This article analyses the influence of a short basalt fibre admixture on the mechanical properties of geopolymers, especially compressive strength. This preliminary research is the first step towards the development of a composite for fire resistant applications in civil engineering. This study investigates the behaviour of a fly ash based geopolymer containing basalt fibres. Fly ash from the coal power plant ‘Skawina’ (located in: Skawina, Lesser Poland, Poland) was used as the raw material. The chemical composition of this fly ash is typical for class F. Three series of fly ash based geopolymers were cast. In the first, short basalt fibres were added as 1% by weight of fly ash, in the second short basalt fibres were added as 2% by weight of fly ash and the third functioned as a control series without any fibres. Each series of samples were tested on compressive strength after 28, 14 and 7 days, and specimen density was determined. Additionally, microstructural analysis was carried out after 28 days. The results show that the addition of basalt fibres can improve the mechanical properties of geopolymer composites. Keywords: geopolymer, basalt fibre, composites, fire resistance

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“…Moreover, the mechanical properties of mineral fibres tend to be greater than those offered by the use of natural fibres for reinforcement [4,5].…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties of Basalt Fiber Reinforced Fly Ash-Based Geopolymer Composites

Korniejenko

Mucsi

Halyag

et al. 2020

KEG

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“…The fibers additions also increase the flexural strength of composites. The fibers improve energy absorption and resistance to deformation [3,[7][8][9]. In particular, the introduction of short fibers due to their easy fiber dispersion and fiber shape factor; it is an effective way to strengthen geopolymer materials [3].…”

Section: Introductionmentioning

confidence: 99%

Impact of Flax Fiber Reinforcement on Mechanical Properties of Solid and Foamed Geopolymer Concrete

Korniejenko

Łach

Hebdowska-Krupa

et al. 2020

Adv. technol. innov.

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The main objective of this study is to develop the advanced composites for civil engineering applications as material for the building industry, especially for an insulation purpose. The research processes include several steps. Firstly, the prototype elements, such as bricks and elevation elements were performed from eco-friendly composite -flax fiber reinforced geopolymer. The elements were designed to take into consideration for environment. Geopolymers are environmentally friendly, sustainable, and resource efficient, including energy demand. Next, the wall was built from these elements and exposed during the three months in a relevant environment. The main conclusion of the research is that the kind of fibers is important for the mechanical properties of the composite, including the fact that for those different fibers could be more beneficial for different raw materials, giving higher strength properties. The significant influence on the mechanical properties of the composites has the adhesion between fiber and material used as a matrix. The adhesion depends among others on the previous treatment of the fibers.

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“…Natural fibres are environmentally friendly alternative to inorganic fibres, such as steel, carbon, glass or synthetic fibres [3,4] in many applications, including within the construction industry [5,6]. They have many advantages [1,[7][8][9], such as:…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2020

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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.

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Mechanical Properties of Wood Fiber Reinforced Geopolymer Composites with Sand Addition

Cited by 70 publications

References 29 publications

Mechanical Properties of Basalt Fiber Reinforced Fly Ash-Based Geopolymer Composites

Mechanical Properties of Basalt Fiber Reinforced Fly Ash-Based Geopolymer Composites

Impact of Flax Fiber Reinforcement on Mechanical Properties of Solid and Foamed Geopolymer Concrete

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

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