Shear behavior of polypropylene fiber-reinforced concrete beams containing recycled aggregate and crumb rubber

Hossain, Fahim; Pal, Avijit; Ahmed, Khondaker Sakil; Bediwy, Ahmed; Alam, M. Shahria

doi:10.1016/j.jclepro.2023.137370

Cited by 15 publications

(2 citation statements)

References 48 publications

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“…Previous researches have shown that addition of fibers can reduce plastic shrinkage cracking [30][31][32]. This Study also shows that polypropylene fibers can be used to reduce plastic shrinkage cracking.…”

Section: Plastic Shrinkage Crackingsupporting

confidence: 61%

Evaluation of strength parameters of plain and reinforced concrete with the addition of polypropylene fibers

Ajwad,

Ilyas,

Muzammal

et al. 2024

Mehran Univ. res. j. eng. technol.

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This research investigates the influence of incorporating small-diameter polypropylene fibers on the mechanical properties of concrete. The studied concrete properties include compressive strength, tensile strength, flexural strength (both plain and reinforced), shear strength, and the mitigation of shrinkage cracks. A total of 92 specimens were meticulously fabricated in the laboratory, comprising cylinders (12 inches in length and 6 inches in diameter), beams (20 x 4 x 4 inches), larger beams (60 x 9 x 9 inches), and slab panels (48 x 48 x 4 inches). During the specimen casting process, a consistent mix with a ratio of 1:2:4 and a water-cement ratio of 0.60 was consistently applied. The polypropylene fiber content varied at 0%, 0.2%, 0.4%, and 0.6% for each property examination. Results indicate a positive impact on all concrete properties studied upon the addition of polypropylene fibers. However, the optimal percentage of polypropylene fibers exhibited variability for each variable and property under investigation. This research contributes insights into the nuanced effects of polypropylene fibers on concrete properties, providing a basis for further exploration and practical application in optimizing concrete performance and durability.

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Section: Plastic Shrinkage Crackingsupporting

confidence: 61%

Evaluation of strength parameters of plain and reinforced concrete with the addition of polypropylene fibers

Ajwad,

Ilyas,

Muzammal

et al. 2024

Mehran Univ. res. j. eng. technol.

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“…The fiber combination (BF: 6 mm; PANF: 12 mm) more easily forms a network structure inside the mortar specimens. Additionally, with increasing fiber content, the specific surface area of the mortar increases and more cement paste is wrapped around the fiber surface [50]. The densities of the fresh and hardened mortar specimens are also presented in Table 5.…”

Section: Fluidity and Densitymentioning

confidence: 99%

Hybrid Effect of Basalt and Polyacrylonitrile Fibers on Physico-Mechanical Properties of Tailing Mortar

Xu,

Pi,

Huang

et al. 2024

Buildings

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In this study, 50% iron ore tailings (IOTs) were used to prepare the cemented mortar at low economic costs and with great environmental benefits. Basalt fiber (BF) and polyacrylonitrile fiber (PANF) were added to the tailing mortar to improve the comprehensive performance of tailing mortars, including BF (0~0.5%), PANF (0~0.05%) and the combination of them. The results show that the addition of BF and PANF can significantly improve the ultrasonic velocity, uniaxial compressive strength (UCS), split-tensile strength (STS), flexural strength (FS) and toughness of the tailing mortar. A novel finding is that the enhancement of hybrid fibers is much better than single fiber, and the best hybrid fiber combination is B0.25P0.05 (0.25 wt% BF and 0.05 wt% PANF), because this combination not only causes the most considerable increase in strength but also possesses great cost-effectiveness. Compared to the B0P0 group without fibers, the maximum increments of B0.25P0.05 in UCS, STS and FS are 45.74%, 52.33% and 15.65%, respectively. It is evidenced that the improvement in STS is the largest because the fibers have good cracking resistance and bridging effect in the tailing mortar. The scanning electron microscope (SEM) further confirms that too many hybrid fibers will agglomerate and produce more voids, which is harmful to the development of the internal structure. Beyond B0.25P0.05, the hydration products are also reduced due to the decrease in nucleation sites, observed by combining X-ray diffraction (XRD) tests. Therefore, it is suggested that the hybrid fibers containing 0.25% BF and 0.05% PANF should be used in this tailing mortar.

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Fiber-reinforced recycled aggregate concrete with crumb rubber: A state-of-the-art review

Shahjalal,

Islam,

Batool

et al. 2023

Construction and Building Materials

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Shear behavior of polypropylene fiber-reinforced concrete beams containing recycled aggregate and crumb rubber

Cited by 15 publications

References 48 publications

Evaluation of strength parameters of plain and reinforced concrete with the addition of polypropylene fibers

Evaluation of strength parameters of plain and reinforced concrete with the addition of polypropylene fibers

Hybrid Effect of Basalt and Polyacrylonitrile Fibers on Physico-Mechanical Properties of Tailing Mortar

Fiber-reinforced recycled aggregate concrete with crumb rubber: A state-of-the-art review

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