Evaluation of mechanical properties of steel fiber reinforced concrete with different strengths of concrete

Abbass, Wasim; Khan, M. Iqbal; Mourad, Shehab

doi:10.1016/j.conbuildmat.2018.02.164

Cited by 328 publications

(137 citation statements)

References 27 publications

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“…In particular, the reinforcement of recycled aggregate concrete using fibers leads to reduced micro-cracks in the cement matrix as well as to an increase in material density. There have been numerous studies on the applications of steel fiber [17][18][19][20][21][22][23] and polypropylene (PP) fibers [24][25][26] in concrete. Moreover, the PP fiber also enjoys popularity in the domain of recycled aggregate concrete [4,27].…”

Section: Introductionmentioning

confidence: 99%

Effect of Nylon Fiber Addition on the Performance of Recycled Aggregate Concrete

Lee

2019

Applied Sciences

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The adhered mortars in recycled aggregates (RA) may lower the performance of the concrete, by for instance reducing its strength and durability, and by cracking. In the present study, the effect of nylon fiber (NF) on the permeability as well as on the mechanical properties of concrete incorporating 100% RA was experimentally investigated. Concrete was produced by adding 0, 0.6 and 1.2 kg/m3 of NF and then cured in water for a predetermined period. Measurements of compressive and split tensile strengths, ultrasonic pulse velocity and total charge passed through concrete were carried out, and the corresponding test results were compared to those of concrete incorporating crushed stone aggregate (CA). In addition, the microstructures of 28-day concretes were examined by using the FE-SEM technique. The test results indicated that recycled coarse aggregate concrete (RAC) showed a lower performance than crushed stone aggregate concrete (CAC) because of the adhered mortars in RA. However, it was obvious that the addition of NF in RAC mixes was much more effective in enhancing the performance of the concretes due to the crack bridging effect from NF. In particular, a high content of NF (1.2 kg/m3) led to a beneficial effect on concrete properties compared to a low content of NF (0.6 kg/m3) with respect to mechanical properties and permeability, especially for RAC mixes.

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Section: Introductionmentioning

confidence: 99%

Effect of Nylon Fiber Addition on the Performance of Recycled Aggregate Concrete

Lee

2019

Applied Sciences

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“…The following should be considered to be the most important parameters of dispersed reinforcement structure, which can inhibit cracking in the cement matrix: volume of fibres in the composite (V f ) [3], slenderness of fibres (λ) [4,5], fibre material characteristics, spatial distribution of fibres in concrete [6], as well as adhesion of fibres to cement matrix, resulting from mechanical anchorage, adhesion, and friction [7]. The addition of steel fibres to concrete might improve some of its mechanical parameters, including compressive strength (f c ) [8,9] and the modulus of elasticity (E c ) [3,8,10]. The use of steel fibres in concrete also significantly increases its flexural tensile strength (f ct,fl ) [3,4,9,11].…”

Section: Introductionmentioning

confidence: 99%

Material Analysis of Steel Fibre Reinforced High-Strength Concrete in Terms of Flexural Behaviour. Experimental and Numerical Investigation

et al. 2020

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The paper presents the results of tests for flexural tensile strength (fct,fl) and fracture energy (Gf) in a three-point bending test of prismatic beams with notches, which were made of steel fibre reinforced high-strength concrete (SFRHSC). The registration of the conventional force–displacement (F–δ) relationship and unconventional force-crack tip opening displacement (CTOD) relationship was made. On the basis of the obtained test results, estimations of parameters fct,fl and Gf in the function of fibre reinforcement ratio were carried out. The obtained results were applied to building and validating a numerical model with the use of the finite element method (FEM). A non-linear concrete damaged plasticity model CDP was used for the description of the concrete. The obtained FEM results were compared with the experimental ones that were based on the assumed criteria. The usefulness of the flexural tensile strength and fracture energy parameters for defining the linear form of weakening of the SFRHSC material under tension, was confirmed. Own equations for estimating the flexural tensile strength and fracture energy of SFRHSC, as well as for approximating deflections (δ) of SFRHSC beams as the function of crack tip opening displacement (CTOD) instead of crack mouth opening displacement (CMOD), were proposed.

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“…Steel fiber was a commonly used fiber type to enhance the basic mechanical properties of concrete. Pan et al found that appropriate addition of steel fiber reduced the fragility of the concrete, improved the shape of the major crack, and increased the toughness and ductility of the concrete matrix [11][12][13]. However, addition of steel fiber raises the weight of concrete itself, which can result in difficulty of construction and differential settlement in terms of mass concrete panels.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Performance and Numerical Simulation of Basalt Fiber Reinforced Concrete (BFRC) Using Double‐K Fracture Model and Virtual Crack Closure Technique (VCCT)

Yong

Sun

Cao

et al. 2019

Advances in Civil Engineering

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This paper mainly investigates the fracture parameters of Basalt Fiber Reinforced Concrete (BFRC) with various fiber lengths and dosages using Double-K fracture model. The model was developed by fracture criterion using ABAQUS Virtual Crack Closure Technique (VCCT), and the results of the model and experiments were compared. The basalt fiber with length of 6 mm and 12 mm was added into concrete in the dosage of 0.0%, 0.1%, 0.2%, 0.3%, 0.4%, and 0.5% by volume of concrete, respectively. Concrete specimens were cast into three dimensions, i.e., 60 mm × 180 mm × 480 mm, 80 mm × 240 mm × 640 mm, and 100 mm × 300 mm × 800 mm. Then, three-point bending test was conducted on precast-notched beams. The load versus cracking mouth opening displacement (P-CMOD curve) was developed in order to evaluate cracking and breaking load. The initial fracture toughness and unstable fracture toughness were derived from the Double-K fracture model aimed to optimize the fiber length and dosage. The results showed that the initial fracture toughness and unstable fracture toughness increased first and then decreased with the increase in fiber dosage, and basalt fiber with length of 6 mm and dosage of 0.2% performed the best toughening effect on concrete. The comparison results showed that numerical simulation can better simulate the initiation and propagation of BFRC fractures and achieve the dynamic propagation process of fractures.

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Evaluation of mechanical properties of steel fiber reinforced concrete with different strengths of concrete

Cited by 328 publications

References 27 publications

Effect of Nylon Fiber Addition on the Performance of Recycled Aggregate Concrete

Effect of Nylon Fiber Addition on the Performance of Recycled Aggregate Concrete

Material Analysis of Steel Fibre Reinforced High-Strength Concrete in Terms of Flexural Behaviour. Experimental and Numerical Investigation

Mechanical Performance and Numerical Simulation of Basalt Fiber Reinforced Concrete (BFRC) Using Double‐K Fracture Model and Virtual Crack Closure Technique (VCCT)

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