An experimental study on strength and toughness of steel fiber reinforced expanded-shale lightweight concrete

Zhao, Minglei; Chen, Meihua; Li, Jie; Law, David W.

doi:10.1016/j.conbuildmat.2018.06.178

Cited by 68 publications

(34 citation statements)

References 24 publications

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“…Existing researches showed that the influences of steel fiber on the strength and toughness of concrete were mainly related to the length-diameter ratio ( l f / d f ) and volume content of steel fiber ( V f ) [ 20 , 38 , 39 , 40 ]. In this study, parameter λ f was introduced to investigate the effect of steel fiber on the properties of SFRCAC, which could be calculated by Equation (8).…”

Section: Test Results and Analysismentioning

confidence: 99%

Effects of Groove and Steel Fiber on Shear Properties of Concrete with Recycled Coarse Aggregate

et al. 2020

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In this paper, a series of shear specimens with or without groove were manufactured to mainly analyze the effects of grooves (or shear section height) and steel fibers on the shear properties of concrete with recycled coarse aggregate through double-side direct shear test. In addition, the relationship between the shear strength and the compressive strength and splitting tensile strength of steel fiber reinforced concrete with recycled coarse aggregate (SFRCAC) was also discussed. The experimental results showed that the peak load, deformation corresponding to the peak load and calculated shear strength of the specimens with grooves were lower than those of the specimens without grooves. The steel fiber and recycled coarse aggregate (RCA) had a significant effect on the shear properties of SFRCAC. As the volume content of steel fibers increased, the shear strength of SFRCAC and the corresponding deformation increased gradually. With the replacement ratio of RCA increasing, the shear strength of SFRCAC decreased but the corresponding deformation increased gradually. Finally, the formula for calculating the shear strength of SFRCAC was proposed by analyzing and fitting the test results and the data of related literature.

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Section: Test Results and Analysismentioning

confidence: 99%

Effects of Groove and Steel Fiber on Shear Properties of Concrete with Recycled Coarse Aggregate

et al. 2020

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“…Other materials include the polycarboxylic acid super-plasticizer and tap-water. The mix proportion of SFRELC was calculated first in accordance with the absolute volume method specified in China cords [41,42], and adjusted reasonably based on previous studies [7,8,9,10]. The saturated dry surface condition of expanded shale and lightweight sand were adopted for the preparation of a fresh mixture of SFRELC, while their 1 h water absorptions were considered to compute the dosage of presoaking water.…”

Section: Experimental Workmentioning

confidence: 99%

“…With the development of modern concrete technology, lightweight concrete reinforced by steel fibers or synthetic fibers has become a popular issue in the research and application of civil engineering [1,2,3,4]. Due to its reliable mechanical properties [5,6,7,8,9], steady volume [10], enhanced durability [8,11], and rational bond performance to rebars [12], steel fiber reinforced expanded-shale lightweight concrete (SFRELC) can be applied as a structural material. One of these attempts is applying SFRELC to the prefabricated structural members in tensile zone under loadings.…”

Section: Introductionmentioning

confidence: 99%

Testing and Prediction of Shear Performance for Steel Fiber Reinforced Expanded-Shale Lightweight Concrete Beams without Web Reinforcements

Zhao

et al. 2019

Materials

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In this paper, for a wide application of high-performance steel fiber reinforced expanded-shale lightweight concrete (SFRELC) in structures, the shear behavior of reinforced SFRELC beams without web reinforcements was experimentally investigated under a four-point bending test. Twenty-six beams were fabricated considering the influencing parameters of SFRELC strength, shear-span to depth ratio, longitudinal reinforcement ratio and the volume fraction of the steel fiber. The statistical analyses based on the foundational design principles and the experimental results are made based on the shear cracking resistance, the shear crack distribution and width, the mid-span deflection, the patterns of shear failure, and the shear capacity of the specimens. This confirms the effective strengthening of steel fibers on the shear performance of reinforced SFRELC beams without web reinforcements. Based on the modifications to the formulas of reinforced conventional concrete, lightweight-aggregate concrete or steel fiber reinforced concrete (SFRC) beams, and the validation against the experimental findings, formulas are proposed for the prediction of shear cracking resistance and shear capacity of reinforced SFRELC beams without web reinforcements. Finally, formulas are discussed for the reliable design of the shear capacity of reinforced SFRELC beams without web reinforcements.

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“…The extensive plastic deformation of fibers during protrusion contributes considerably to the energy dissipation of cementitious composites under impact loading [19]. Zhao et al [20] reported that fibers in the matrix improve the energy consumption of concrete and change the failure mode from brittle to ductile. Compared with other fibers such as polypropylene fiber and polyethylene fiber, polyvinyl alcohol (PVA) fiber has high strength and elastic modulus, and it has good durability and interfacial bonding strength with cement matrix [21].…”

Section: Introductionmentioning

confidence: 99%

Dynamic Mechanical Behavior of Fiber-Reinforced Seawater Coral Mortars

Long

Tang

et al. 2019

Materials

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Coral aggregate has been widely used for island construction because of its local availability. However, the addition of coral aggregate exaggerates the brittle nature of cement-based materials under dynamic loading. In this study, polyvinyl alcohol (PVA) fiber was used to improve dynamic mechanical behavior of seawater coral mortars (SCMs). The effects of coral aggregate and PVA fiber on the workability, static mechanical strengths, and dynamic mechanical behavior of fiber-reinforced SCMs were investigated. Results showed that the workability of the SCM decreased with increasing coral aggregate replacement rate and PVA fiber content. Mechanical strengths of the SCM increased with increasing PVA fiber content, but decreased with increasing coral aggregate replacement rate. Dynamic mechanical behavior at varying coral aggregate replacement rates was analyzed by combining dynamic mechanical analysis and micro-scale elastic modulus experiment. With increasing coral aggregate replacement rate, the storage modulus, loss factor, and elastic modulus of the interfacial transition zone in the SCM decreased. Nevertheless, with the incorporation of PVA fibers (1 vol.%), the storage modulus and loss factor were improved dramatically by 151.9 and 73.3%, respectively, compared with the reference group. Therefore, fiber-reinforced coral mortars have a great potential for use in island construction, owing to the excellent anti-vibrational performance.

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An experimental study on strength and toughness of steel fiber reinforced expanded-shale lightweight concrete

Cited by 68 publications

References 24 publications

Effects of Groove and Steel Fiber on Shear Properties of Concrete with Recycled Coarse Aggregate

Effects of Groove and Steel Fiber on Shear Properties of Concrete with Recycled Coarse Aggregate

Testing and Prediction of Shear Performance for Steel Fiber Reinforced Expanded-Shale Lightweight Concrete Beams without Web Reinforcements

Dynamic Mechanical Behavior of Fiber-Reinforced Seawater Coral Mortars

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