Journal ArticleDOI
Effects of Fibre Geometry and Volume Fraction on the Flexural Behaviour of Steel‐Fibre Reinforced Concrete
TLDR
In this article, the authors studied the mechanical behaviour of concrete reinforced with steel fibres of different geometry and volume fraction and found improvement in the mechanical properties, in particular the toughness, was observed with the increase of the volume fraction of steel-fibres in the concrete.Abstract:
This work aims in studying the mechanical behaviour of concrete, reinforced with steel fibres of different geometry and volume fraction. Experiments include compression tests and fourpoint bending tests. Slump and air content tests were performed on fresh concrete. The flexural toughness, flexural strength and residual strength factors of the beam specimens were evaluated in accordance with ASTM C1609/C1609M-05 standard. Improvement in the mechanical properties, in particular the toughness, was observed with the increase of the volume fraction of steel-fibres in the concrete. The fibre geometry was found to be a key factor affecting the mechanical performance of the material.read more
Citations
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Journal ArticleDOI
Classification of cracking mode in concrete by acoustic emission parameters
TL;DR: In this paper, a number of acoustic emission indices are proposed to classify the cracks according to their mode, which can provide a warning against the final failure of a concrete structure during bending.
Journal ArticleDOI
Mechanisms of interfacial bond in steel and polypropylene fiber reinforced geopolymer composites
Navid Ranjbar,Sepehr Talebian,Mehdi Mehrali,Carsten Kuenzel,Hendrik Simon Cornelis Metselaar,Mohd Zamin Jumaat +5 more
TL;DR: In this paper, the effects of wettability, chemical characterization and nanometric roughness of two different fibers, polypropylene (PPF) and micro steel fibers (MSF), superposed by shrinkage of fly ash based geopolymer binder on fiber-matrix interaction and the consequent mechanical properties of the corresponding composites.
Journal ArticleDOI
Acoustic emission characterization of the fracture process in fibre reinforced concrete
Dimitrios G. Aggelis,D. V. Soulioti,N. Sapouridis,Nektaria-Marianthi Barkoula,Alkiviadis S. Paipetis,Theodore E. Matikas +5 more
TL;DR: In this article, different acoustic emission indices are correlated with the accumulation of damage and the type of source, and the amplitude distribution of acquired signals is very sensitive to micro-cracking, while individual mechanisms like matrix cracking and fibre pull-out can be distinguished by the average frequency of the corresponding signals which exhibits a severe decrease at the moment of main.
Journal ArticleDOI
Effect of polyvinyl alcohol (PVA) fibre on dynamic and material properties of fibre reinforced concrete
TL;DR: In this paper, the effect of uncoated polyvinyl alcohol (PVA) fiber addition on dynamic properties of fiber reinforced concrete (FRC) has been investigated in the current study.
Journal ArticleDOI
Machine learning-based prediction for compressive and flexural strengths of steel fiber-reinforced concrete
TL;DR: The water-to-cement ratio and silica fume content were the most influential factors in the prediction of compressive strength of SFRC, whereas the silicafume and fiber volume fraction most strongly influenced the flexural strength.
References
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Journal ArticleDOI
Mechanical properties of high-strength steel fiber-reinforced concrete
TL;DR: In this paper, the authors investigated the mechanical properties of high-strength steel fiber-reinforced concrete, including compressive and splitting tensile strength, modulus of rupture, and toughness index.
Journal ArticleDOI
Effect of aspect ratio and volume fraction of steel fiber on the mechanical properties of SFRC
TL;DR: In this paper, the effects of aspect ratio (l/d) and volume fraction (Vf) on the compressive strength, split tensile strength, flexural strength and ultrasonic pulse velocity of steel fiber reinforced concrete (SFRC) were investigated.
Journal ArticleDOI
Engineered Steel Fibers with Optimal Properties for Reinforcement of Cement Composites
TL;DR: In this paper, the authors describe the rationale and technical background behind the development and design of a new generation of steel fibers for use in cement, ceramic and polymeric matrices.
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Effects of steel fiber addition on mechanical properties of concrete and RC beams
TL;DR: In this paper, the performance of reinforced concrete (RC) beams with Dramix RC-80/0.60-BN type of steel fibers (SFs) at dosages of 0, 30, 60, 60 kg/m3 and their compressive strengths, split tensile strength, moduli of elasticity and toughnesses are measured.
Journal ArticleDOI
On the characterization of flexural toughness in fiber reinforced concretes
TL;DR: In this article, a review of the available methods of characterizing the flexural toughness of fiber reinforced concretes (FRCs) is presented, along with guidelines from standards institutions and other professional agencies in North America, Europe and Japan.