The effects of steel, polypropylene, and high-performance macro polypropylene fibers on mechanical properties and durability of high-strength concrete

Hosseinzadeh, Haniyeh; Salehi, Amir; Mehraein, Mojtaba; Asadollahfardi, Gholamreza

doi:10.1016/j.conbuildmat.2023.131589

Cited by 42 publications

(6 citation statements)

References 34 publications

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“…Another study reported that using waste macro PP fibers of 30 mm length by 1% v/f improves the compressive strength loss reduction by 28.47% against acid attack [54]. Similarly, another study reported that PP fibers in SCC incorporated at 0.10% exhibit 16.5% strength loss reduction at 90 days of immersion in 3% dilute sulfuric acid [67]. In the current study, similar to the test results for freezing and thawing, the compressive strength loss with 1.5% fiber content at 92 days is similar to that for concrete containing 0.5% fibers.…”

Section: Acid Attackmentioning

confidence: 92%

“…Beyond this value, the strength loss starts to increase again. When exposed to 5% sodium sulfate solution, there is a reduction in compressive strength loss from 20% to 11% with the addition of 0.3% of PP fibers by weight of the cement into SCC [67]. Similarly, another study reported that PP fibers in SCC incorporated at 0.10% along with 20% of granite powder exhibit 25.4% improved strength at 90 days of exposure to sulfate solution [29].…”

Section: Sulfate Attackmentioning

confidence: 94%

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Durability Properties of Macro-Polypropylene Fiber Reinforced Self-Compacting Concrete

Chen,

Waheed,

Iqbal

et al. 2024

Materials

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Concrete is one of the most commonly used construction materials; however, its durability plays a pivotal role in areas where the concrete is exposed to severe environmental conditions, which initiate cracks inside and disintegrate it. Randomly distributed short fibers arrest the initiation and propagation of micro-cracks in the concrete and maintain its integrity. Traditional polypropylene fibers are thin and encounter the problem of balling effects during concrete mixing, leading to uneven fiber distribution. Thus, a new polypropylene fiber is developed by gluing thin ones together, forming macro-polypropylene fibers. Thus, different amounts of fibers, 0–1.5% v/f with an increment of 0.5% v/f, are used in different grades of concrete to study their impact on durability properties, including resistance to freezing and thawing cycles, sulfate, and acid attacks. A total of 432 cube samples were tested at 28, 56, and 92 days. The results reveal that the maximum durability, in terms of compressive strength loss, is noted with a fiber content of 1% with improved resistance of 72%, 54%, and 24% against freeze–thaw cycles, sulfate attack, and hydrochloric acid attack, respectively, at 92 days. Thus, the resulting fiber-reinforced concrete may be effective in areas where these extreme exposure conditions are expected.

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Section: Acid Attackmentioning

confidence: 92%

Section: Sulfate Attackmentioning

confidence: 94%

Durability Properties of Macro-Polypropylene Fiber Reinforced Self-Compacting Concrete

Chen,

Waheed,

Iqbal

et al. 2024

Materials

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“…Elevated permeability can amplify corrosion by external agents, thus reducing the service life of concrete structures [ 1 , 2 ]. Current research suggests that the addition of polypropylene fiber (PF) as reinforcement can improve the permeability resistance of concrete [ 1 , 2 , 3 , 4 ].…”

Section: Introductionmentioning

confidence: 99%

Influence of Polypropylene Fiber on Concrete Permeability under Freeze-Thaw Conditions and Mechanical Loading

Zeng,

Wang,

Wang

et al. 2024

Materials

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Polypropylene fiber reinforcement is an effective method to enhance the durability of concrete structures. With the increasing public interest in the widespread use of polypropylene fiber reinforced concrete (PFRC), the necessity of evaluating the mechanism of polypropylene fiber (PF) on the permeability of concrete has become prominent. This paper describes the influence of PF on the concrete permeability exposed to freeze-thaw cycles under compressive and tensile stress. The permeability of PFRC under compressive and tensile loads is accurately measured by a specialized permeability setup. The permeability of PFRC under compressive and tensile loads, the volume change of PFRC under compressive load, and the relationship between compressive stress levels at minimum permeability and minimum volume points of PFRC are discussed. The results indicate that the addition of PF adversely affects the permeability of concrete without freeze-thaw damage and cracks. However, it decreases the permeability of concrete specimens exposed to freeze-thaw cycles and cracking. Under compressive load, the permeability of PFRC initially decreases slowly and follows by a significant increase as the compressive stress level increases. This phenomenon correlates with the volume change of the specimen. The compressive stress level of the minimum permeability point and compressive stress level of the minimum volume point of PFRC exhibit a linear correlation, with a fitted proportional function parameter γ ≈ 0.98872. Under tensile load, the permeability of PFRC increases gradually with radial deformation and follows by a significant increase. The strain-permeability curves of PFRC under loading are studied and consist of two stages. In stage I, the permeability of PFRC gradually decreases with the increase of strain under compressive load, while the permeability increases with the increase of strain under tensile load. In stage II, under compressive load, the permeability of PFRC increases with the increase of freeze-thaw cycles, whereas under tensile load, the permeability gradually decreases with the increase of freeze-thaw cycles. The reduction of PF on the permeability of PFRC under tensile load is greater than that under compressive load. In future research, the relationship between strain and permeability of PFRC can be integrated with its constitutive relationship between stress and strain to provide a reference for the application of PF in the waterproofing of concrete structures.

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“…The use of fiberreinforced concrete in the construction industry has become very important [3]. The application of PP fibers in construction as reinforcement in concrete already has a long history [4][5][6][7]. However, ways to overcome the disadvantages, such as the low affinity between the fibers and the cement matrix, are still being sought.…”

Section: Introductionmentioning

confidence: 99%

Sorption Capabilities of Polypropylene/Modified Polypropylene Fibers

Petková,

Ujhelyiová,

Ryba

et al. 2023

Fibers

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The aim of this paper is to present the influence of the modification of polypropylene (PP) fibers on the sorption capabilities of the fibers. The physical modification of the PP fibers was made with inorganic nanoadditives in the mass, with a view to improving the properties of silicate composites used in the construction industry. The compositions of the modified PP fibers using two different nanoadditives were based on previous work, as well as the work presented in this paper. The prepared modified PP fibers were compared with pure PP fibers, and their mechanical and thermomechanical properties were evaluated. Another task of this work was to evaluate and compare the sorption capabilities of these fibers without the preparation of concrete blocks. Therefore, the Washburn method was used. However, the obtained results led us to the conclusion that the given method points to the excellent transport properties of PP fibers if such properties are used to evaluate the sorption of the fibers. However, the sorption of the prepared modified fibers could be associated with the nanoadditives used, which have a higher water sorption capacity compared to pure PP fibers, and this could also ensure the higher adhesion of the modified PP fibers with inorganic additives to the cement matrix compared to the adhesion of the hydrophobic PP fibers.

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The effects of steel, polypropylene, and high-performance macro polypropylene fibers on mechanical properties and durability of high-strength concrete

Cited by 42 publications

References 34 publications

Durability Properties of Macro-Polypropylene Fiber Reinforced Self-Compacting Concrete

Durability Properties of Macro-Polypropylene Fiber Reinforced Self-Compacting Concrete

Influence of Polypropylene Fiber on Concrete Permeability under Freeze-Thaw Conditions and Mechanical Loading

Sorption Capabilities of Polypropylene/Modified Polypropylene Fibers

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