Durability and damage model of polyacrylonitrile fiber reinforced concrete under freeze–thaw and erosion

Duan, Minghan; Qin, Yuan; Li, Yang; Zhou, Heng

doi:10.1016/j.conbuildmat.2023.132238

Cited by 9 publications

(3 citation statements)

References 42 publications

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“…Regardless of whether the PVA fibers were provided alone or mixed with NS, the relative dynamic elastic modulus decayed slowly before 50 freeze–thaw cycles and accelerated thereafter, but all values were consistently smaller than that of the C0. Duan et al [ 5 ] also found in the course of their study that 50 cycles was the cut-off point using chloride and sulfate as the freeze–thaw cycling media. A comparison of the test results shows that NS incorporation can effectively mitigate freeze–thaw damage, but the overall trend is the same.…”

Section: Resultsmentioning

confidence: 99%

“…Deicing salts are often used in winter due to the need to quickly remove snow and ice from roads and bridges. However, common deicing salts, usually NaCl and Cl-, penetrate the cement matrix through cracks and accelerate material strength damage under the action of freeze–thaw cycles [ 4 , 5 ]. Therefore, the development of cementitious composites with high durability and excellent mechanical properties is necessary to address the challenges faced by concrete applications in regions with negative temperatures.…”

Section: Introductionmentioning

confidence: 99%

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Durability and Mechanical Properties of Nano-SiO2 and Polyvinyl Alcohol Fiber-Reinforced Cementitious Composites Subjected to Saline Freeze–Thaw Cycles

Wan,

Zhao,

et al. 2024

Materials

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To investigate the effects of nano-SiO2 (NS) and polyvinyl alcohol (PVA) fibers on the durability and mechanical properties of cementitious composites subjected to saline freeze–thaw cycling, a series of PVA fiber-reinforced cementitious composite (PFRCC) specimens were prepared using various fiber contents, and a series of NS and PVA fiber-reinforced cementitious composite (NPFRCC) specimens were prepared using various combinations of NS and fiber contents. Durability and fracture toughness tests were subsequently conducted on the specimens after different numbers of saline freeze–thaw cycles. The results indicate that the degradation of material properties can be divided into slow and accelerated damage stages before/after 50 freeze–thaw cycles. The durability and fracture toughness of the specimen series tended to increase, then decrease with increasing NS and PVA contents, suggesting optimum levels. When the PVA fiber content was 0.5%, PFRCC specimens had the best durability after saline freeze–thaw cycles; when the NS and PVA fiber contents were 1.0% and 0.5%, respectively, NPFRCC specimens had the best durability and fracture properties, and the initiation toughness, destabilization toughness, and fracture energy after 100 saline freeze–thaw cycles were 120.69%, 160.02%, and 451.31%, respectively. The results of this study may guide future exploration of the durability and mechanical properties of concrete subjected to freeze–thaw action.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Durability and Mechanical Properties of Nano-SiO2 and Polyvinyl Alcohol Fiber-Reinforced Cementitious Composites Subjected to Saline Freeze–Thaw Cycles

Wan,

Zhao,

et al. 2024

Materials

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“…Therefore, the mechanical properties of PAN fiber RC are also changed, and its freeze-thaw damage characteristics also differ greatly from ordinary RC. For example, Duan [27] analyzed the apparent characteristics and microscopic results of specimens after salt freezing cycle tests on PAN fiber reinforced concrete, explored the mechanism of salt freezing damage, and established a salt freezing damage model for PAN fiber reinforced concrete based on the damage mechanics theory of the classical Aas-Jakobsen equation. Ji et al [28] developed a model that can predict the degree of damage to RC under freeze-thaw cycles with different waste brick coarse aggregate replacement rates.…”

mentioning

confidence: 99%

Polyacrylonitrile Fiber Recycled Concrete Frost Durability Test And Damage Modeling Study

Wang,

Shen,

Deng

et al. 2024

Preprint

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The recycling of concrete is environment-friendly and contributes to the sustainable development strategy. Recycled concrete can achieve better compressive strength, but there are deficiencies in tensile and frost durability. Then, the polyacrylonitrile fiber can be used as a toughening component due to its good properties such as high tensile strength, high ultimate elongation, etc., which can endow the recycled concrete with higher toughness and maintain the properties of concrete under the high altitude and cold conditions. In this study, mechanical tests and frost durability tests were conducted on polyacrylonitrile fiber recycled concrete with polyacrylonitrile fiber mixing content of 0.7 kg/m3, 0.8 kg/m3, 0.9 kg/m3 and recycled coarse aggregate’s substitution rates of 30%, 40%, and 50%. The results showed that the concrete with the best frost durability is the one with 40% replacement of recycled coarse aggregate and 0.8 kg/cm3 of polyacrylonitrile fiber. Based on the experimental research, a freeze-thaw damage model of polyacrylonitrile fiber recycled concrete was developed, revealing the damage mechanism of polyacrylonitrile fiber recycled concrete. The results are of great significance in theory and engineering for the application of recycled concrete.

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Pore fractal characteristics and ANN model of polyacrylonitrile fiber reinforced concrete under the synergistic effects of freeze-thaw and erosion

Duan,

Qin,

Geng

et al. 2024

Composites Communications

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Durability and damage model of polyacrylonitrile fiber reinforced concrete under freeze–thaw and erosion

Cited by 9 publications

References 42 publications

Durability and Mechanical Properties of Nano-SiO2 and Polyvinyl Alcohol Fiber-Reinforced Cementitious Composites Subjected to Saline Freeze–Thaw Cycles

Durability and Mechanical Properties of Nano-SiO2 and Polyvinyl Alcohol Fiber-Reinforced Cementitious Composites Subjected to Saline Freeze–Thaw Cycles

Polyacrylonitrile Fiber Recycled Concrete Frost Durability Test And Damage Modeling Study

Pore fractal characteristics and ANN model of polyacrylonitrile fiber reinforced concrete under the synergistic effects of freeze-thaw and erosion

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