Enhancing the shrinkage resistance and impermeability of cement-based materials using carbon fiber modified by in situ-grown nano-SiO2 and carbon nanotubes

Zhou, Feifei; Pan, Ganghua; Zhang, Lingling

doi:10.1016/j.jobe.2022.105542

Cited by 6 publications

(3 citation statements)

References 37 publications

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“…It is known as the "king of new materials" and it is widely used in various fields of national defense science and technology as well as national economy such as automobiles, aerospace, wind power generation, buildings, and bridges. It is also an ideal cement stone reinforcing material (Yang et al, 2022;Yu et al, 2022;Liu et al, 2023;Zhou et al, 2023). The CF reinforced cement and CF grid reinforced concrete have also been studied worldwide (Ibrahim et al, 2022).…”

Section: Open Access Edited Bymentioning

confidence: 99%

Preparation of SiO2 coated carbon fibers and its interfacial properties with cement paste matrix

Geng¹,

Ren

Yang

et al. 2023

Front. Mater.

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As a porous brittle material, oil well cement in oil and gas well cementing is difficult to bear complex loads, which can easily lead to the failure of the mechanical integrity of cement sheath. In this paper, SiO2 coating-CF toughening material was obtained by SiO2 modified carbon fibers (CFs) surface. In addition, the mechanical properties and mechanism of SiO2 coated-CF cement stone were discussed. The obtained results showed that the mechanical properties of SiO2 coated-CF cement paste are significantly improved. After 14 days of curing, the compressive strength can reach 32.98 MPa and the tensile strength is increased by 162%. The CF after adding SiO2 surface film improves the adhesion between the interface and the fiber by forming chemical bonds at the bonding surface with the cement paste, so as to improve the CF reinforced cement paste.

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Section: Open Access Edited Bymentioning

confidence: 99%

Preparation of SiO2 coated carbon fibers and its interfacial properties with cement paste matrix

Geng¹,

Ren

Yang

et al. 2023

Front. Mater.

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“…Furthermore, the utilization of fiber significantly prolongs the initial cracking time and substantially improved the concrete's resistance to cracking caused by drying. Furthermore, several researchers have posited that the incorporation of fibers into concrete can effectively mitigate shrinkage cracking and enhance its resistance to shrinkage (Choi et al, 2023;Zhou et al, 2023). Moreover, Chen et al (2022) conducted a study examining the impact of varying lengths of polypropylene fiber in concrete.…”

Section: Introductionmentioning

confidence: 99%

Increasing the Length of Concrete Pavement Slabs Using Shrinkage Reducing Admixture and Polypropylene Fiber

Gholami,

Moghadas Nejad,

Ramezanianpour

2024

Int J Concr Struct Mater

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Pavement engineers frequently employ concrete pavements because of their benefits such as extended lifetime, superior performance and durability, and so on. However, there are some disadvantages of these pavements such as shrinkage which may lead to cracking, warping, and limiting the length of the concrete pavement slabs. Shrinkage reducing admixture (SRA) and polypropylene fibers can be employed to prevent or control shrinkage cracking. In this study, increasing the length of concrete pavement slabs using shrinkage reducing admixture and polypropylene fiber was investigated. For mix compositions, two water–cement ratios of 0.35 and 0.4 were employed, and the percentages of SRA and polypropylene fiber utilized in mixes were 2% and 1% by weight of cement, respectively. Slump, compressive strength, third point flexural strength, electrical resistance, free and restrained shrinkage tests were carried out as the experimental programming to investigate the effect of these materials on concrete behavior and evaluate the amount of concrete pavement design parameters. Statistical analysis and RSM were used to determine the significance of each parameter and their interactions on concrete properties. It was observed that the use of SRA had no influence on workability; however, polypropylene fibers reduced the slump flow of concrete. Also, the use of SRA resulted in a decrease in mechanical properties. In addition, the use of polypropylene fibers considerably enhanced the energy absorption of concrete. Furthermore, on concrete containing SRA and polypropylene fiber, the magnitude of free and restrained shrinkage and crack width were reduced. Finally, the length and thickness of concrete pavement slabs were evaluated using the experimental results on the Tehran-Shomal freeway as a case study. The slab length could be increased by about 20% without any significant change in the slab thickness using SRA and polypropylene fiber in concrete mix composition. This can lead to an increase in construction speed, improve the durability of pavement and generally increase the quality of the concrete pavement.

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“…10 However, the concrete material tends to shrink and easily causes cracks under alkaline and low temperature conditions. 11 The coarse surface texture, poor gradation and agglomeration of manufactured sand always weaken the interfacial transition zones between the manufactured sand and other aggregates in concrete, which limits the reinforcing effect of manufactured sand on concrete material. 12,13 Consequently, the extensive application of manufactured sand in cement-based materials is restricted.…”

Section: Introductionmentioning

confidence: 99%

Chemically functionalized manufactured sand as the novel additive for enhancing the properties of cement-based composites

Wang

Zhang

et al. 2023

RSC Adv.

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Enhancing the shrinkage resistance and impermeability of cement-based materials using carbon fiber modified by in situ-grown nano-SiO2 and carbon nanotubes

Cited by 6 publications

References 37 publications

Preparation of SiO2 coated carbon fibers and its interfacial properties with cement paste matrix

Preparation of SiO2 coated carbon fibers and its interfacial properties with cement paste matrix

Increasing the Length of Concrete Pavement Slabs Using Shrinkage Reducing Admixture and Polypropylene Fiber

Chemically functionalized manufactured sand as the novel additive for enhancing the properties of cement-based composites

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