Flexural toughness and calculation model of super-fine stainless wire reinforced reactive powder concrete

Dong, Sufen; Zhou, Desheng; Ashour, Ashraf; Han, Baoguo; Ou, Jinping

doi:10.1016/j.cemconcomp.2019.103367

Cited by 43 publications

(8 citation statements)

References 27 publications

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“…12(b). This result was consistent with the observation of Dong et al [26]. It could be clarified that the FGC samples with an h/H ratio of 0.50 were stable and effective.…”

Section: Flexural Strength and Flexural Toughnesssupporting

confidence: 93%

“…Similarly, point L/600 and L/150 could be determined as the intersection points of the horizontal axis and residual load P 600 and P 150 , respectively. Referring to a previous study [26], the flexural toughness (in J/m 2 ) was calculated by the integral area of load-deflection under first peak load (P 1 ) defined as first crack -flexural toughness, while that was calculated by the integral area of load-deflection under peak load (P max ) defined as peak flexural toughness, and that was determined by the total integral area of load-deflection referred to limit flexural toughness, see Fig. 6.…”

Section: Test Methodsmentioning

confidence: 99%

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Effect of the height of reinforced concrete layer on the mechanical properties of functionally graded concrete incorporating fly ash and polypropylene fiber

Luan

Trinh

Viet

et al. 2021

STCE

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The present research aims to investigate the influence of the ratio of reinforced concrete layer height to total height (h/H) on the mechanical properties of functionally graded concrete (FGC) containing fly ash (Fa) and polypropylene (PP) fiber. All FGC samples were prepared with a constant water-to-cementitious materials ratio of 0.36 and ordinary Portland cement was replaced with Fa at 20% by mass. The reinforcement layer of FGC was enhanced with PP fiber inclusion (0.3% by volume of concrete). The effect of various h/H ratios of 0.25, 0.50, and 0.75 on the mechanical properties of the FGC samples was evaluated. The results show that flexural strength, flexural toughness, and compressive strength values of the FGC with PP fiber were higher than those of FGC without PP fiber at the age of 28 days regardless of Fa replacement. The experimental results also pointed out that the FGC samples prepared using an h/H ratio of 0.50 were beneficial in terms of mechanical properties.

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“…12(b). This result was consistent with the observation of Dong et al [26]. It could be clarified that the FGC samples with an h/H ratio of 0.50 were stable and effective.…”

Section: Flexural Strength and Flexural Toughnesssupporting

confidence: 93%

Section: Test Methodsmentioning

confidence: 99%

Effect of the height of reinforced concrete layer on the mechanical properties of functionally graded concrete incorporating fly ash and polypropylene fiber

Luan

Trinh

Viet

et al. 2021

STCE

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“…1 Several studies have been carried out on the properties of carbon fibre reinforcement in cement-based materials, reinforcement effect, and flexural toughness in concrete. [2][3][4] Moreover, some researchers have helped the construction field by enlightening the world with chopped fibres for attaining high-strength concrete. 5,6 Several researchers have benefited the construction industry by raising public awareness of incorporating chopped fibres to generate highstrength concrete.…”

Section: Introductionmentioning

confidence: 99%

“…1 Several studies have been carried out on the properties of carbon fibre reinforcement in cement-based materials, reinforcement effect, and flexural toughness in concrete. 2–4…”

Section: Introductionmentioning

confidence: 99%

Chopped carbon fibre reinforcement in high-strength concrete: Flexural characteristics

Lamba,

Raj,

Singh

2024

Materials Science and Technology

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In this study, the flexural behaviour of high-strength concrete was tested with chopped carbon fibres that were 30 mm long and added in amounts of 0.2%, 0.4%, 0.6%, 0.8%, and 1%. Thirty-six prisms were evaluated experimentally for flexural strength at 28 days using an ultrasonic pulse velocity test and a flexural testing machine. X-ray diffraction and linear regression analysis were carried out to characterise crystalline material and linear correlation amongst different mixes. Increasing the number of carbon fibres in high-strength concrete led to unexpected and innovative findings, such as lower pulse velocities and improved flexural characteristics up to an optimum dosage point. In SEM images of chopped carbon fibres, debonding was the most prevalent cause of failure.

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“…Smarzewski [7] conducted three-point bending tests on notched beams and unnotched specimens, and calculated and compared the toughness using evaluation methods such as ASTM and RILEM. Dong et al [8] investigated the flexural toughness of ultrafine steel fiber reinforced concrete and established a flexural toughness model based on composite material theory.…”

Section: Introductionmentioning

confidence: 99%

Numerical Analysis of Bending Toughness of Steel Fiber Reinforced Cement Based Materials

Yun-guo¹,

Li²,

Zhu³

et al. 2023

HSET

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Steel fibers have a significant toughening effect on cement-based materials. In order to address the issue of relying solely on experimental evaluation of their bending toughness, a numerical analysis method based on the steel fiber bridging theory has been proposed. By establishing a crack extension criterion for fiber-reinforced cement-based composite materials based on the balance between the stress intensity factor generated by external loads, steel fibers, and matrix cohesion at the crack tip and the fracture toughness of the composite material, the toughness of the composite material is evaluated. Through steel fiber-matrix pull-out tests, the bonding characteristics of four types of steel fibers, namely shear, milling, short hook, and long hook, with the matrix are analyzed. A program is then developed using Ansys software APDL language for numerical simulation of the bending and cracking process of the notched beam of the steel fiber-reinforced cement-based composite material. The obtained load-deflection curve and bending toughness index are compared with the results of the notched beam bending test, thereby validating the correctness of the numerical analysis method. The results show that the bending toughness of steel fiber-reinforced cement-based composite materials is closely related to the volume fraction of steel fibers and their bonding characteristics. The balance relationship of the stress intensity factor at the crack tip is the key factor determining crack propagation, and the proposed numerical analysis method can effectively assist in the analysis of the bending toughness of steel fiber-reinforced cement-based composite materials.

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Flexural toughness and calculation model of super-fine stainless wire reinforced reactive powder concrete

Cited by 43 publications

References 27 publications

Effect of the height of reinforced concrete layer on the mechanical properties of functionally graded concrete incorporating fly ash and polypropylene fiber

Effect of the height of reinforced concrete layer on the mechanical properties of functionally graded concrete incorporating fly ash and polypropylene fiber

Chopped carbon fibre reinforcement in high-strength concrete: Flexural characteristics

Numerical Analysis of Bending Toughness of Steel Fiber Reinforced Cement Based Materials

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