Mechanical Properties of Short Polymer Fiber-Reinforced Geopolymer Composites

Korniejenko, Kinga; Lin, Wei‐Ting; Šimonová, Hana

doi:10.3390/jcs4030128

Cited by 59 publications

(69 citation statements)

References 99 publications

(320 reference statements)

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“…A limitation to the wide application of geopolymer materials is their relatively low brittle behavior (crack resistance) [ 22 , 23 ]. Currently, one of the most important research areas concerns the improvement of these mechanical properties [ 24 , 25 ]. A well-known solution is the production of fiber-reinforced composite materials.…”

Section: Introductionmentioning

confidence: 99%

“…Polymer fibers are the most frequently used group of fibers as reinforcing additives [ 25 ]. The main objective of the addition of these types of fibers is improving mechanical properties, in particular bending strength [ 24 , 27 ], and reducing the propagation of microcracks in materials [ 23 , 28 ].…”

Section: Introductionmentioning

confidence: 99%

“…Other benefits that can be achieved as a result of introducing chemical fibers into geopolymers, depending on their type, may include an increase in fire resistance [ 24 , 27 ] or a decrease in the thermal conductivity coefficient. The main advantages of chemical, polymer fibers are their higher strength properties and repeatability compared to natural fibers [ 25 , 29 ]. Additional features desirable for particular applications may include decreasing the weight of geopolymer composites with the addition of polymer fibers [ 24 , 25 ].…”

Section: Introductionmentioning

confidence: 99%

“…The main advantages of chemical, polymer fibers are their higher strength properties and repeatability compared to natural fibers [ 25 , 29 ]. Additional features desirable for particular applications may include decreasing the weight of geopolymer composites with the addition of polymer fibers [ 24 , 25 ].…”

Section: Introductionmentioning

confidence: 99%

“…The background for this work was literature research showing the novelty aspects of the planned research. The available literature does not present research using as many possible fillers as reinforcement for geopolymer matrices, such as melamine fibers [ 25 , 29 ]. Research using melamine has been conducted with organic polymers.…”

Section: Introductionmentioning

confidence: 99%

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Fly-Ash-Based Geopolymers Reinforced by Melamine Fibers

et al. 2021

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This paper presents the results of research on geopolymer composites based on fly ash with the addition of melamine fibers in amounts of 0.5%, 1% and 2% by weight and, for comparison, without the addition of fibers. The melamine fibers used in the tests retain their melamine resin properties by 100% and are characterized by excellent acoustic and thermal insulation as well as excellent filtration. In addition, these fibers are nonflammable, resistant to chemicals, resistant to UV radiation, characterized by high temperature resistance and, most importantly, do not show thermal-related shrinking, melting and dripping. This paper presents the results of density measurements, compressive and flexural strength as well as the results of the measurement of thermal radiation changes in samples subjected to a temperature of 600 °C. The results indicate that melamine fibers can be used as geopolymer reinforcement. The best result was achieved for 0.5% by weight amount of reinforcement, approximately 53 MPa, compared to 41 MPa for a pure matrix. In the case of flexural strength, the best results were obtained for the samples made of unreinforced geopolymer and samples with the addition of 0.5% by weight of melamine fibers, which were characterized by bending strength values above 9 MPa, amounting to 10.7 MPa and 9.3 MPa, respectively. The thermal radiation measurements and fire-jet test did not confirm the increasing thermal and fire resistance of the composites reinforced by melamine fiber.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Fly-Ash-Based Geopolymers Reinforced by Melamine Fibers

et al. 2021

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Environmental degradation of foamed geopolymers

Korniejenko

Figiela

Kozub

et al. 2022

Continuum Mech. Thermodyn.

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Modern materials used in civil engineering should fulfill the numerous of requirements connected building standards, but not only. They should also be ecological and durable. Geopolymers are characterized by very good mechanical properties, high resistance against acids, chlorides and sulfates, high thermal resistance, and other properties confirmed by previous research. There is still a few amount of research connected with resistance, this materials for different environmental conditions, especially a lack of investigation connected with foamed geopolymers in this area. The main objective of the article is to analyze the possibilities of the development of new foamed geopolymer composites to increase durability, especially against degradation in corrosive water environments. This paper presents the influence on the mechanical properties of foamed geopolymer composites on the water environment. As raw materials, fly ash from the coal power plant ‘Skawina’ (located in: Skawina, Lesser Poland, Poland) and metakaolin (Czech Republic) were used. The chemical composition of the fly ash is typical for class F. Additionally, the composites were reinforced by flax fiber. Solid and foam samples were prepared. As a foaming agent, hydrogen peroxide (H$$_{2}$$ 2 O$$_{2})$$ 2 ) was applied. The following research methods were applied: compressive strength, flexural strength, porosity measurements, water absorption in fresh and salt water. The results show that, however, environmental conditions have a significant influence on the mechanical properties of geopolymer composites; the geopolymer composites can be successfully produced with the addition of natural fibers and have good strength parameters even after long-term use (materials were tested after 360 days).

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