Comparison of frost resistance for the fiber reinforced geopolymer and cementitious composites

Öztürk, Oğuzhan

doi:10.1016/j.matpr.2022.04.493

Cited by 9 publications

(9 citation statements)

References 13 publications

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“…Öztürk [ 36 ] also noted in his study that cement mortars showed a decrease in compressive strength after freeze–thaw cycles. This reduction was more pronounced at an early age (after 7 days of curing).…”

Section: Resultsmentioning

confidence: 98%

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Properties of 3D Printed Concrete–Geopolymer Hybrids Reinforced with Aramid Roving

et al. 2022

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Three-dimensional concrete printing (3DCP) is an innovative technology that can lead to breakthrough modifications of production processes in the construction industry. The paper presents for the first time the possibility of 3D printing concrete–geopolymer hybrids reinforced with aramid roving. Reference concrete samples and concrete–geopolymer hybrids composed of 95% concrete and 5% geopolymer based on fly ash or metakaolin were produced. The properties of the samples without reinforcement and samples with 0.5% (wt.) aramid roving were compared. The frost resistance tests, UV radiation resistance, and thermal conductivity were evaluated for samples that were 3D-printed or produced by the conventional casting method. Compressive strength tests were carried out for each sample exposed to freeze–thaw cycles and UV radiation. It was observed that after the frost resistance test, the samples produced by the 3D printing technology had a minor decrease in strength properties compared to the samples made by casting. Moreover, the thermal conductivity coefficient was higher for concrete–geopolymer hybrids than concrete reinforced with aramid roving.

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Section: Resultsmentioning

confidence: 98%

“…This is due to the fact that immersion of samples in water is more harmful to geopolymers compared to cement mixtures. This is probably because the free sodium content is leached out during the freeze–thaw cycles [ 36 ].…”

Section: Resultsmentioning

confidence: 99%

Properties of 3D Printed Concrete–Geopolymer Hybrids Reinforced with Aramid Roving

et al. 2022

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“…The durability of rigid road pavements in the climatic conditions of European and many other countries is significantly affected by the frost resistance of concrete [ 20 , 21 , 25 , 59 ]. For concrete industrial floors, frost resistance is of lesser importance, except for the floors of open warehouses.…”

Section: Research Results and Analysismentioning

confidence: 99%

Strength, Frost Resistance, and Resistance to Acid Attacks on Fiber-Reinforced Concrete for Industrial Floors and Road Pavements with Steel and Polypropylene Fibers

et al. 2022

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A comparison of the effect of steel and polypropylene fibers on the strength, frost resistance, abrasion, and corrosion resistance in an acidic environment of fiber-reinforced concrete for industrial floors and road pavements was carried out. Steel fibers with a length of 50 mm and a diameter of 1 mm and polypropylene fibers with a length of 36 mm and a diameter of 0.68 mm were used. The amount of steel fiber varied from 15 to 25 kg/m3, and the amount of polypropylene fiber varied from 2 to 3 kg/m3. It has been established that steel fiber more significantly increases the concrete compressive strength, and both types of dispersed reinforcement increase the flexural strength equally by 27–34%. Also, dispersed reinforcement reduces the concrete abrasion resistance by 15–35% and increases its frost resistance by 50 cycles, which helps to improve the durability of industrial floors and road pavements. The use of steel fiber in an amount of 20 kg/m3 and polypropylene fiber in an amount of 2.5 kg/m3 also increases the concrete corrosion resistance in an acidic environment. In general, dispersed reinforcement with both fiber types has approximately the same technological effect concerning the mentioned applications. However, the use of polypropylene fibers is economically more profitable since an increase in the cost of 1 m3 of concrete with steel fiber reinforcement is from $22.5 to $37.5, and an increase in cost with polypropylene fiber is from $10 to $15.

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“…Reproduced from [18], with permission from [Publisher] The pure fly ash base polymer is destroyed after 50 freezing-thawing cycles, but the addition of 0.1% carbon nanotubes and 2% polyvinyl alcohol fiber withstands 175 freezing-thawing cycles [78]. Polyamide fiber can also improve the freeze-thaw cycle durability of fly ash base geopolymer [79]. Besides, the compressive strength of polypropylene fiber reinforced geopolymer increases during 56 freeze-thaw cycles, but decreases during 300 freeze-thaw cycles [80].…”

Section: Freezing-thaw Resistancementioning

confidence: 99%

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

Qin

Yan

Zhou

et al. 2022

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Geopolymer concrete shares similar mechanical properties with ordinary Portland cement (OPC) concrete, and is even provided with better performances in high temperature and high corrosion circumstances. However, geopolymer binder is still subject to 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 retains the high strength. Over the past 10 years, a significant advance has been made in the research of fiber reinforced geopolymers in terms of toughening efficiency and durability improvement. This paper, as a mini review, focuses on three types of fibers, i.e., inorganic fiber, natural fiber and synthetic fiber, in geopolymers, and their specific effects on compressive, flexural and tensile strengths, fractural toughness, shear strength and durability including shrinkage, chemical and freezing-thaw resistances. The recement understanding of bonding mechanism and fiber-geopolymer interface are also discussed, and knowledge gaps and future work challenges are correspondingly pointed out.

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Comparison of frost resistance for the fiber reinforced geopolymer and cementitious composites

Cited by 9 publications

References 13 publications

Properties of 3D Printed Concrete–Geopolymer Hybrids Reinforced with Aramid Roving

Properties of 3D Printed Concrete–Geopolymer Hybrids Reinforced with Aramid Roving

Strength, Frost Resistance, and Resistance to Acid Attacks on Fiber-Reinforced Concrete for Industrial Floors and Road Pavements with Steel and Polypropylene Fibers

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

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