Fully reacted high strength geopolymer made with diatomite as a fumed silica alternative

Bağcı, Cengiz; Kutyla, Gregory P.; Kriven, Waltraud M.

doi:10.1016/j.ceramint.2017.07.222

Cited by 58 publications

(38 citation statements)

References 43 publications

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“…As regards other mineral additives, work was carried out on fibres based on silica, aluminium oxide and zirconium [21]. Other mineral additives used in geopolymer composites include diatomaceous earth [22], however, this additive was not introduced in the form of fibres, but grains with a diameter of 1.2 µm and wollastonite, also introduced in the form of micro-additives [23,24].…”

Section: Ricon19 -Remine International Conferencementioning

confidence: 99%

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

Korniejenko

Mucsi

Halyag

et al. 2020

KEG

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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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Section: Ricon19 -Remine International Conferencementioning

confidence: 99%

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

Korniejenko

Mucsi

Halyag

et al. 2020

KEG

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“…These fibres were introduced into a geopolymer matrix based on metakaolin with the addition of particles after grinding bricks (so-called refractory bricks) in amounts: 0.5 and 1% by weight. [75]. The highest compressive strength values were obtained for a matrix with the addition of 15% ground refractory brick about 56 MPa and for the same matrix reinforced with 1% fibres.…”

Section: Mineral Fibresmentioning

confidence: 86%

“…Another tested mineral additives in geopolymers were composition: silica, alumina and zirconium (diameter about 3.5 μm and length 20 -35 mm) [75]. These fibres were introduced into a geopolymer matrix based on metakaolin with the addition of particles after grinding bricks (so-called refractory bricks) in amounts: 0.5 and 1% by weight.…”

Section: Mineral Fibresmentioning

confidence: 99%

“…For bending strength, the values obtained for reinforced composite are significantly better. In this case, the crack modulus was compared, which was 8.4 MPa for the matrix material, and 14.4 MPa for the composite with 1% fibres [75]. Other mineral additives used in geopolymer composites include diatomaceous earth [76], however, this additive was not introduced in the form of fibres, but grains with a diameter of 1.2 µm and wollastonite, also introduced in the form of micro-additives [77,78].…”

Section: Mineral Fibresmentioning

confidence: 99%

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The overview of mechanical properties of short natural fiber reinforced geopolymer composites

Korniejenko

Łach

Sağlamtimur

et al. 2020

Environmental Research and Technology

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In the EU there is a pressing need for the change of the current economy into a so-called circular economy in recent years. The rational management of natural resources and the use of waste materials are becoming more and more important. It is also supported by the growing ecological awareness of society, including the consciousness of sustainable development. Nowadays, it is the construction industry that has the most significant impact on pollution. Therefore, numerous attempts are made to reduce energy consumption and the amount of waste generated by it. These are the main issues stimulating the research on new innovative materials such as geopolymer composites. They have a significantly lower carbon footprint than traditional construction materials. Moreover, the synthesis of geopolymers requires 2-3 times less energy than traditional Portland cement, not to mention the fact that 4-8 times less CO2 is generated. In addition, the above process has another environmental benefit i.e. the possibility of using anthropogenic raw materials (minerals) such as slags and fly ashes for the production. One of the limitations for the wide use of such materials is their relatively low brittle fracture behaviour. Nowadays, one of the most important research areas is the improvement of their mechanical properties. To improve the mechanical properties it is possible to reinforce the matrix by fibres addition, especially natural fibres that are renewable resources. The main objective of the article is to analyse the mechanical properties of new composites and assessment the possibility to replace traditional building materials within eco-friendly alternatives.

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“…To solve this problem, fillers, such as carbon black and silica, were used to improve the mechanical properties of fluorine rubber [1], but the carbon black causes industrial pollution during the production process and the reinforced effect of silica was not ideal. In view of this problem, attempts were made to find a natural non-polluting material [2] to improve the properties of fluorine rubber. At present, some scholars have filled pure natural diatomite in various kinds of rubbers and the effect of modification is not significant [3].…”

Section: Introductionmentioning

confidence: 99%

Silica- and diatomite-modified fluorine rubber nanocomposites

Cong

2019

Bull Mater Sci

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To find the most suitable filler system for fluorine rubber, a simple and green method to introduce a limited content of silanol groups on the surfaces of silica and fluorine rubber was studied. Fluorine rubber nano-composites were prepared by using nano-silica, diatomite and carbon black as the reinforcement and filler and the coupling agents KH550, KH590 or Si69 as the compatibilizer between the filler and fluorine rubber. The structure and morphology of the composites were investigated by Fourier transform infrared (FTIR) spectroscopy and scanning electron microscopy (SEM). The results showed that the most suitable filler system for fluorine rubber was the diatomite and silica compound (8:12 mass ratio), the best coupling agent was KH550 at 2 parts per hundred rubber (phr). The modified compound filler was silanized with the coupling agent KH550 for fluorine rubber by FTIR analysis, the compatibility between the filler and fluorine rubber was improved by SEM analysis and further confirmed by thermogravimetric analysis to improve the thermal properties of fluorine rubber with the filler compound system.

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Fully reacted high strength geopolymer made with diatomite as a fumed silica alternative

Cited by 58 publications

References 43 publications

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

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

The overview of mechanical properties of short natural fiber reinforced geopolymer composites

Silica- and diatomite-modified fluorine rubber nanocomposites

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