Mechanical properties of reactive powder concrete containing industrial and waste steel fibres at different ratios under compression

Al-Tikrite, Ahmed; Hadi, Muhammad N.S.

doi:10.1016/j.conbuildmat.2017.08.024

Cited by 70 publications

(38 citation statements)

References 36 publications

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“…The slabs of steel reinforcement ratio (ρ) of (0.0033) [3] were failed in tension mode, while the slabs of steel ratio (ρ) of (0.0066) were failed in a combined mode of tension and shear, highlighting that the slab of MRPCS2-0.8-70 was failed by tension mode due to inclusion higher steel fibers content. Adding the steel fibers to the concrete mixture of the [4] MRPC slabs improved the ultimate load capacity up to (45 and 66) %, for slabs with steel fibers of (0.4 and 0.8) %, respectively, as compared to non-fibrous slabs.…”

Section: Resultsmentioning

confidence: 99%

“…Thickness of slab (T=50 and T=70) mm. [3] Type of concrete [Normal Concrete (NC) and [4] Modified Reactive Powder Concrete (MRPC)].…”

Section: These Variables Arementioning

confidence: 99%

“…[2] Replacing part of the cementitious binder (cement + [3] silica fume) by 8 mm crushed aggregate. Replacing all fine sand and part of the cementitious [4] materials by 8 mm crushed aggregate.…”

Section: Introductionmentioning

confidence: 99%

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Flexural Strength of Modified Reactive Powder Concrete One Way Slabs

Abtan¹,

Hassan²

2019

TOCIEJ

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Background: Over the last three decades, the interest in using advanced high-performance materials in the construction industry has been increasing worldwide. Recently, a very high strength cement-based composite with high ductility called Reactive Powder Concrete (RPC) has been developed. The RPC concept is based on the principle that a material with a minimum of defects such as micro-cracks and voids will be able to achieve greater load-carrying capacity and durability. Methods: In the present paper, an experimental program of sixteen reinforced concrete one-way slabs was conducted to investigate their behavior under flexural loading. Four of these slabs were with Normal Concrete (NC) and the others of Modified Reactive Powder Concrete (MRPC). All slabs were identical in the dimension of its length and width (1000×500) mm, respectively, and its thickness was varied as one of the variables used in the present work. Other parameters for a one-way slab are concrete type, steel fibers content and flexural steel reinforcement ratio (0.33 and 0.66)%. Results: The results showed that the MRPC slabs with steel fibers failed in a ductile manner and had ultimate load capacity more than that of non-fibrous MRPC with an improvement percentage that reaches up to (66) %. This percentage became (212) % in comparison with normal concrete slabs. Conclusions: Moreover, the results showed that slabs, for both concrete types, reinforced with lower steel ratio failed by tension mode, otherwise, the slabs of higher reinforcement steel ratio failed by combined tension-shear mode. However, an improvement was observed in the ultimate load capacity up to (53 and 98) % when the ratio of steel reinforcement and slab thickness increased, respectively.

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Section: Resultsmentioning

confidence: 99%

“…Thickness of slab (T=50 and T=70) mm. [3] Type of concrete [Normal Concrete (NC) and [4] Modified Reactive Powder Concrete (MRPC)].…”

Section: These Variables Arementioning

confidence: 99%

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Flexural Strength of Modified Reactive Powder Concrete One Way Slabs

Abtan¹,

Hassan²

2019

TOCIEJ

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“…The interest in the utilization of Ultra-High Strength Concrete (UHSC) in construction is increasing with the continuous development in the construction industry. Specifically, the use of Reactive Powder Concrete (RPC), which is well known for its superior strength and durability [1][2][3][4][5], in structural members such as columns in lower stories is highly desirable.…”

Section: Introductionmentioning

confidence: 99%

Axial-flexural interaction diagram of RPC columns reinforced with steel fibres

Al-Tikrite

Hadi

2019

Structures

Self Cite

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This paper presents analytical modelling of the axial-flexural behaviour of Reactive Powder Concrete (RPC) columns reinforced with and without steel fibres of different types (industrial and waste) in individual and hybrid forms. An analytical stress-strain model for unconfined RPC was used for the analysis of the axial loads and bending moments of the fibrous RPC columns. The layer-by-layer numerical integration method was used to calculate the axial load and bending moments in this study. The analytically developed axial load-bending moment (P-M) interaction diagrams were validated by using experimental results from the literature. A para-metric study was carried out to investigate the influence of the properties of steel fibres on the axial-flexural behaviour of fibrous RPC columns. It was found that the analytical unconfined stress-strain model used in this study well estimates the maximum axial loads and the maximum bending moments of the RPC columns reinforced with and without different types of steel fibres. Also, the influence of the properties of steel fibres is more pronounced at eccentric and flexural loading

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“…Those models and their parameters were mainly developed based on the experimental results of beam-column joints with normal concrete (NC); however, the mechanical properties vary significantly between UHPFRC and NC. The compressive strength of UHPFRC ranges from 120 to 800 MPa; its fracture energy can reach 40,000 J/m 2 , its toughness index (TI) can reach 3.5, and its ultimate tensile strain can reach up to 0.0003 [11][12][13]. The improvement of UHPFRC in terms of strength, toughness, and deformation capacity will influence the failure characteristics of the structure, which may affect the load-carrying capacity.…”

Section: Introductionmentioning

confidence: 99%

Seismic Behavior and Shear Bearing Capacity of Ultra-High Performance Fiber-Reinforced Concrete (UHPFRC) Beam-Column Joints

Wang

Zheng

et al. 2018

Applied Sciences

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This work aims to investigate the seismic behavior and shear bearing capacity of Ultra-High Performance Fiber-Reinforced Concrete (UHPFRC) beam-column joints. Quasi-static tests were conducted on five exterior and four interior reinforced UHPFRC beam-column joints; the behavior of specimens was examined in terms of failure processes, shear deformation angle, load transfer, and loadbearing capacity. The influences of the joint types, axial compression load level, and stirrup ratio in joint cores on the failure modes and shear carrying capacity of joints were analyzed. The shear resistance mechanism of a reinforced UHPFRC beam-column joint consists of the diagonal strut and truss mechanisms. The role of steel fiber through cracks is similar to reinforcement bars in the truss mechanism; based on these mechanisms and the test results, a formula was proposed to predict the shear carrying capacity of reinforced UHPFRC joints. The formula can reflect the effects of axial compression load level, steel fiber content, and stirrup ratio in the joint core on the shear carrying capacity of the beam-column joint, which can be used not only for UHPFRC beam-column joint design, but also steel fiber high-strength concrete joints.

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Mechanical properties of reactive powder concrete containing industrial and waste steel fibres at different ratios under compression

Abstract: Mechanical properties of reactive powder concrete containing industrial and waste steel fibres at different ratios under compression" (2017). Faculty of Engineering and Information Sciences-Papers: Part B. 519.

Cited by 70 publications

References 36 publications

Flexural Strength of Modified Reactive Powder Concrete One Way Slabs

Flexural Strength of Modified Reactive Powder Concrete One Way Slabs

Axial-flexural interaction diagram of RPC columns reinforced with steel fibres

Seismic Behavior and Shear Bearing Capacity of Ultra-High Performance Fiber-Reinforced Concrete (UHPFRC) Beam-Column Joints

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