Improving Concrete Properties With Fibers Addition

Mello, Elson Braga de; Ribellato, C.; Mohamedelhassan, Eltayeb

doi:10.5281/zenodo.1091168

Cited by 5 publications

(5 citation statements)

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“…Additionally, the AC-CF specimen exhibited the highest compressive strength, followed by the BC-CF and the control specimens. Considering that the experimental conditions for AC-CF and BC-CF were fixed at 3 g, these findings aligned with previous studies that demonstrated improved compressive strength of cement composites when the fibre percentage was below 0.75% [6,7,9]. Denser cement composites typically develop smaller void amounts, leading to higher compressive strength [27].…”

Section: Compressive Strengths Of the Cement Compositessupporting

confidence: 87%

“…This outcome occurred due to the fresh concrete movement obstruction from the fibre interaction with other concrete constituents [9]. Previous studies also demonstrated a positive correlation between the higher fibre percentage and fibre length in improving the compressive and flexural strength of concrete [6][7][8][9][10][11][12]. These improved concentre properties were attributed to the fibres, serving as a bridge to maintain the proximity of concrete particles [13].…”

Section: Introductionmentioning

confidence: 95%

“…Numerous studies demonstrated that gradually adding carbon fibre into concrete reduced workability [5][6][7][8]. This outcome occurred due to the fresh concrete movement obstruction from the fibre interaction with other concrete constituents [9]. Previous studies also demonstrated a positive correlation between the higher fibre percentage and fibre length in improving the compressive and flexural strength of concrete [6][7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

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Mixing Sequence Effect of Cement Composites With Carbon Fibres

Rizalman,

Anthony,

Thurairajah

et al. 2024

IIUMEJ

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Carbon fibres are widely recognised as reinforcement materials that effectively control cracks in concrete structures. Nonetheless, these fibres do not disperse uniformly inside the cement matrix, disrupting the mixture homogeneity. To address this concern, this study investigated two distinct mixing sequences of cement composites with carbon fibres. Two mixing sequences were investigated including the addition of fibres after cement (AC-CF) and the addition of fibres before cement (BC-CF). The surface topography of carbon fibres and the engineering properties of the cement paste were also examined. Consequently, carbon fibres in cement composite produced lower flowability due to the surface roughness. The AC-CF specimen demonstrated the highest hardened density at 28 days with 2679.22 kg/m3 followed by BC-CF and the control specimen with 2386.08 kg/m3 and 2278.36 kg/3, respectively. The AC-CF specimen also had the highest compressive strength at 28 days with 69.91 MPa, followed by BC-CF and the control specimen with 65.92 MPa and 63.20 MPa, respectively. Further, the flexural strength of the AC-CF specimen exhibited the highest strength with 10.86 MPa, followed by BC-CF and the control specimen with 9.35 MPa and 9.17, respectively. The fibre dispersion in AC-CF was also superior to BC-CF. Therefore, it can be concluded that the best mixing sequence is the addition of fibre after cement (AC-CF) because it had better fibre dispersion and engineering properties compared to the addition of fibre before cement (BC-CF). ABSTRAK: Gentian karbon lebih dikenali sebagai bahan bantuan yang berkesan dalam mengawal keretakan pada struktur konkrit. Walau bagaimanapun, gentian ini tidak tersebar secara seragam di dalam matrik simen dan akan mengganggu kehomogenan campuran. Bagi mengatasi masalah ini, kajian ini mengkaji tentang dua susunan campuran berbeza simen komposit dengan gentian karbon. Dua susunan campuran ini adalah melalui penambahan gentian selepas simen (AC-CF) dan penambahan gentian sebelum simen (BC-CF). Permukaan topografi gentian karbon dan sifat kejuruteraan pes simen turut diperiksa. Kajian mendapati bahawa gentian karbon dalam komposit simen mengurangkan kebolehaliran pes simen disebabkan oleh kekasaran pada permukaan gentian. Spesimen AC-CF menunjukkan ketumpatan pengerasan tertinggi pada hari ke-28 dengan 2679.22 kg/m3 diikuti spesimen BC-CF dan spesimen kawalan sebanyak 2386.08 kg/m3 dan 2278.36 kg/m3, masing-masing. Spesimen AC-CF juga mempunyai kekuatan mampatan tertinggi pada hari ke-28 dengan 69.91 MPa, diikuti oleh spesimen BC-CF dan spesimen kawalan sebanyak 65.92 MPa dan 63.20 MPa, masing-masing. Seterusnya, kekuatan lenturan spesimen AC-CF menunjukkan kekuatan tertinggi dengan 10.86 MPa, diikuti spesimen BC-CF and spesimen kawalan dengan 9.35 MPa dan 9.17 MPa, masing-masing. Penyebaran gentian dalam AC-CF juga lebih baik daripada BC-CF. Oleh itu, kajian ini merumuskan bahawa susunan campuran terbaik adalah dengan penambahan gentian selepas simen (AC-CF) kerana ia mempunyai kekuatan lenturan gentian terbaik dan sifat kejuruteraan berbanding penambahan gentian sebelum simen (BC-CF).

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Section: Compressive Strengths Of the Cement Compositessupporting

confidence: 87%

Section: Introductionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

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Mixing Sequence Effect of Cement Composites With Carbon Fibres

Rizalman,

Anthony,

Thurairajah

et al. 2024

IIUMEJ

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“…When the concrete underwent a tensile test, the pressure was transferred through the pressure was transferred by the interaction at the fiber-matrix interface and continued until the fiber reached its ultimate tensile strength and eventually fractured. E. Mello (Mello et al, 2014) also reached similar conclusions.…”

Section: Flexural Strengthsupporting

confidence: 62%

Study on mechanical properties and self-sensing properties of sprayed high-performance concrete containing glass aggregate

Wang,

Zhang

et al. 2024

Front. Mater.

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Using glass sand as a substitute for sand in high-performance concrete not only conserves resources but also helps protect the environment. This study replaced manufactured sand with glass sand and added carbon fiber to prepare high-performance shotcrete. Its mechanical and self-sensing properties were then tested separately. The findings suggest that with an increase in glass sand content, the compressive strength of high-performance shotcrete initially rises and subsequently declines. When the replacement ratio of glass sand is 75%, the compressive strength exhibits its maximum value, whereas an increase in the glass sand content leads to a reduction in both splitting tensile strength and flexural strength. Although increasing carbon fiber content does not significantly contribute to compressive strength, it significantly improves flexural strength and splitting tensile strength. In addition, when testing the self-sensing performance of the material, it was found that its self-sensing performance increased significantly with increasing carbon fiber content but decreased with increasing glass sand content. Finally, an Ansys APDL simulation using the relevant parameters of the optimal group of mechanical properties was performed to model a tunnel and verify its feasibility and validity. This study provides a theoretical and practical reference for future engineering applications.

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“…The utilization of CF waste in civil engineering applications, particularly in cement composites, has also gained considerable attention. The application of CF to cement composites has already shown significant improvements in the properties of cement composites; RCF has excellent potential for use in cement composites instead of virgin carbon fibers (VCF) because it retains its strength even after recycling [11][12][13]. Multiple studies have reported that RCF can retain its mechanical strength up to a range of 90-98% compared to that of the VCF [14][15][16]; this further validates RCF as an eco-friendly and economical alternative to VCF.…”

Section: Introductionmentioning

confidence: 99%

A Critical Review on the Application of Recycled Carbon Fiber to Concrete and Cement Composites

Bhandari,

Nam

2024

Recycling

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Carbon fiber (CF) exhibit extraordinary properties, such as high specific and tensile strength, high elastic modulus, light weight, and weather resistance, which has led to a rapid increase in the use of CF in sectors such as aerospace, sports equipment, energy storage, automotive, construction, and wind energy applications. However, the increase in CF applications has led to a massive production of CF waste. As CF is non-biodegradable, it results in CF accumulation in landfills. CF waste is a rapidly growing ecological hazard because of its high energy consumption and expensive production methods. The properties of carbon fibers can be preserved even after recycling given the development of recycling technology; therefore, multiple studies have been conducted to demonstrate the effect of recycled carbon fiber (RCF) in different composites such as cement-based composites. This review presents the results of studies conducted on the application of RCF to cement composites and analyzes those results to investigate the effect of RCF on the properties of cement composites such as mechanical properties (compressive strength, flexural strength, and tensile strength), fracture characteristics (fracture toughness and fracture energy), electrical properties, and workability. Overall, the studies demonstrated a positive trend in the application of RCF to cement composites.

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Improving Concrete Properties With Fibers Addition

Cited by 5 publications

References 0 publications

Mixing Sequence Effect of Cement Composites With Carbon Fibres

Mixing Sequence Effect of Cement Composites With Carbon Fibres

Study on mechanical properties and self-sensing properties of sprayed high-performance concrete containing glass aggregate

A Critical Review on the Application of Recycled Carbon Fiber to Concrete and Cement Composites

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