Rheological and tribological behaviors of polypropylene fiber reinforced concrete

Bentegri, Imane; Boukendakdji, Othmane; Kadri, El-Hadj; Ngo, Tien-Tung; Soualhi, Hamza

doi:10.1016/j.conbuildmat.2020.119962

Cited by 30 publications

(7 citation statements)

References 28 publications

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“…e permeability resistance of concrete can be improved by adding PPFs. Some investigations showed that PPF can effectively prevent the segregation of fresh concrete and improve the uniformity of concrete mixture [45,46]. At hardened stage, the concrete with PPFs has less cracks, and the creaks in concrete were smaller and finer than the concrete without PPF.…”

Section: Permeabilitymentioning

confidence: 99%

Review on the Durability of Polypropylene Fibre-Reinforced Concrete

Liu

Wang

Cao

et al. 2021

Advances in Civil Engineering

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Polypropylene fibre (PPF) is a kind of polymer material with light weight, high strength, and corrosion resistance. The crack resistance of concrete can be improved by adding PPFs. PPF can optimize the pore size distribution of concrete. As a result, the durability of concrete is significantly enhanced since PPF can block the penetration of water or harmful ions in concrete. This paper summarizes the influence of polypropylene fibre on the durability of concrete, including drying shrinkage, creep, water absorption, permeability resistance, chloride ion penetration resistance, sulfate corrosion resistance, freeze-thaw cycle resistance, carbonation resistance, and fire resistance. The authors analysed the effects of fibre content, fibre diameter, and fibre hybrid ratio on these durability indexes. The durability property of concrete can be further improved by combining PPFs and steel fibres. The drawbacks of PPF in application in concrete are the imperfect dispersion in concrete and weak bonding with cement matrix. The methods to overcome these drawbacks are to use fibre modified with nanoactive powder or chemical treatment. At last, the authors give the future research prospects of concrete made with PPFs.

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Section: Permeabilitymentioning

confidence: 99%

Review on the Durability of Polypropylene Fibre-Reinforced Concrete

Liu

Wang

Cao

et al. 2021

Advances in Civil Engineering

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“…The postcracking regime is mainly determined by the fiber amount 1 and fiber geometry. [2][3][4] An increase in the fiber amount and longer fibers 5,6 result in an improved crack bridging effect, which causes a better stress-strain relation. In the last decades, many design considerations were suggested for the tensile stress-strain behavior of fiber-reinforced concrete.…”

Section: Introductionmentioning

confidence: 99%

“…It must be highlighted that Equations (3) and ( 4) are used as a starting point of the new model in the future Eurocode 2 (EC2) and fib Model code 2020. In this new model, the characteristic strength values (f R1,k and f R3,k ) are directly incorporated to calculate the effective tensile strength at SLS (f Ft1,ef ) and CMOD 3 (f Ft3,ef ), as given in Equations ( 5) and (6).…”

Section: Introductionmentioning

confidence: 99%

Improved simplified constitutive tensile model for fiber‐reinforced concrete

Vandevyvere

2023

Structural Concrete

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Due to the low strain capacity and the weak crack resistance of concrete, fibers are commonly added to concrete to increase its tensile resistance. The most recent standardized constitutive tensile model is given in the fib Model code 2010, which is based on a simplified stress profile at serviceability limit state (SLS) and ultimate limit state (ULS). However, in current research, an improved stress profile at ULS is proposed. Consequently, three new constitutive tensile models, which are valued for a specific FRC class, are developed. Those models are constructed with the test data of fiber‐reinforced concrete with natural aggregates (FR‐NAC) and three types of recycled aggregates (FR‐RAC). In addition, macro glass fibers and macro polypropylene fibers are used. The test data indicate that the lower concrete Young's modulus of FR‐RAC, as well as the crack growth resistance due to plastic work of the recycled concrete mixtures, result in an increased residual tensile strength at SLS and ULS. The residual tensile strength at 2.5 mm CMOD () of the normal recycled aggregate concrete (nRAC) mixture with 0.75 V% glass fibers is 0.95 MPa, while the FR‐NAC mixture with the same fiber content only indicates a ‐value of 0.43 MPa. Consequently, higher linear postcracking stresses are observed for the FR‐RAC mixtures, especially for the FR‐RAC mixtures with 0.75 V% glass fibers and the lower quality of recycled aggregates.

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“…The application of fibers can effectively change the rheological properties of fluids . In fracturing fluids, Elgaddafi found that fiber-containing fluids had a stronger bearing capacity on the proppant than fiber-free fluids, which could hinder the settlement movement of the proppant − and improve the proppant transport efficiency during the fracturing process, further carrying the proppant into the fracture .…”

Section: Introductionmentioning

confidence: 99%

Effect of Fiber on Rheological Properties and Flow Behavior of Polymer Completion Fluids

et al. 2021

ACS Omega

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The application of fiber in the completion fluid can improve the rheological properties of the completion fluid and the plugging quality of the production layer by the completion fluid and reduce the damage of the filtrate to the reservoir formation. However, there are few studies on the influence of fibers on the rheological properties of completion fluids and the flow behavior in pores. In this paper, plant fiber, mineral fiber, and synthetic fiber are discussed. Carbon fiber, bamboo fiber, polypropylene fiber, and polyester fiber are selected as research objects. The dependence of the rheological property of polymer solution on fiber type, fiber concentration, temperature, and shear rate is evaluated. The evaluation is carried out by observing the microscopic state of the fiber through a microscope and a scanning electron microscope, testing the rheological property parameters of the fiber with an OFITE 900 rheological tester, and fitting with the Herschel−Bulkley model. The results show that polypropylene fiber and carbon fiber have the best dispersion in polymer solution. The higher the fiber content, the greater the influence of fiber on the rheological properties of the solution. Compared with the other three fibers, carbon fiber has the greatest influence on the rheological properties of polymer solution. When the temperature is lower than 70 °C, the influence of the fiber on the rheological properties of the solution is not affected by the temperature. When the temperature exceeds 70 °C, the carbon fiber and polypropylene fiber are affected by the temperature, and the viscosity of the polymer solution is increased. The flow behavior of fiber suspensions in pores varies with the flow factor n. Carbon fiber suspensions are most conducive to the transition of polymer solution to plate laminar flow, which can improve the bearing capacity of plugging materials.

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Rheological and tribological behaviors of polypropylene fiber reinforced concrete

Cited by 30 publications

References 28 publications

Review on the Durability of Polypropylene Fibre-Reinforced Concrete

Review on the Durability of Polypropylene Fibre-Reinforced Concrete

Improved simplified constitutive tensile model for fiber‐reinforced concrete

Effect of Fiber on Rheological Properties and Flow Behavior of Polymer Completion Fluids

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