In recent years, an emerging technology termed, “High-Performance Fiber-Reinforced Concrete (HPFRC)” has become popular in the construction industry. The materials used in HPFRC depend on the desired characteristics and the availability of suitable local economic alternative materials. Concrete is a common building material, generally weak in tension, often ridden with cracks due to plastic and drying shrinkage. The introduction of short discrete fibers into the concrete can be used to counteract and prevent the propagation of cracks. Despite an increase in interest to use HPFRC in concrete structures, some doubts still remain regarding the effect of fibers on the properties of concrete. This paper presents the most comprehensive review to date on the mechanical, physical, and durability-related features of concrete. Specifically, this literature review aims to provide a comprehensive review of the mechanism of crack formation and propagation, compressive strength, modulus of elasticity, stress–strain behavior, tensile strength (TS), flexural strength, drying shrinkage, creep, electrical resistance, and chloride migration resistance of HPFRC. In general, the addition of fibers in high-performance concrete has been proven to improve the mechanical properties of concrete, particularly the TS, flexural strength, and ductility performance. Furthermore, incorporation of fibers in concrete results in reductions in the shrinkage and creep deformations of concrete. However, it has been shown that fibers may also have negative effects on some properties of concrete, such as the workability, which get reduced with the addition of steel fibers. The addition of fibers, particularly steel fibers, due to their conductivity leads to a significant reduction in the electrical resistivity of the concrete, and it also results in some reduction in the chloride penetration resistance of the concrete.

High-performance fiber-reinforced concrete: a review

A review of X-ray computed tomography of concrete and asphalt construction materials

Mechanical and fracture properties of concrete reinforced with recycled and industrial steel fibers using Digital Image Correlation technique and X-ray micro computed tomography

https://hal-enpc.archives-ouvertes.fr/hal-02384580/document

Multiscale X-ray tomography of cementitious materials: A review

Steel fibres reinforced 3D printed concrete: Influence of fibre sizes on mechanical performance

Determination of steel fibres distribution in self-compacting concrete beams using X-ray computed tomography

Determination of 3D porosity in steel fibre reinforced SCC beams using X-ray computed tomography

X-ray computed tomography harnessed to determine 3D spacing of steel fibres in self compacting concrete (SCC) slabs

Spatial and dynamical handwriting analysis in mild cognitive impairment

In the paper, a research programme focused on determination of steel fibre dispersion in self-compacting concrete using the X-ray computed tomography method is presented. Large scale specimens were cast (in the form of walls 1.2 m × 1.2 m × 0.15 m), containing different types of steel fibre. The tests were conducted on beam specimens cut from each wall. Both traditional destructive tests (compressive strength, three point bending) and non-destructive tests (X-ray computed tomography imaging followed by image analysis) were performed. The X-ray computed tomography method allowed to precisely determine fibre dispersion in the whole volume of the walls. These results were compared with mechanical properties of cut beams and their original location in the walls. Differences in fibre volume and dispersion between top and bottom parts of the walls were observed. The influence of the fibre type and the casting point location was also significant. Longer fibres became more effectively orientated in parallel to the bending loading direction, resulting in enhancement of the mechanical properties of the concrete. Tests on 16 beams (cut from each wall), through load–deflection relations, provided a thorough picture of mechanical uniformity of the material properties inside the walls. The X-ray computed tomography imaging proved to be intuitive and accurate in the assessment of steel fibre dispersion.

https://link.springer.com/content/pdf/10.1617%2Fs11527-014-0444-y.pdf

Monika N. Bugdol

Papers

Determination of steel fibres distribution in self-compacting concrete beams using X-ray computed tomography

Determination of 3D porosity in steel fibre reinforced SCC beams using X-ray computed tomography

X-ray computed tomography harnessed to determine 3D spacing of steel fibres in self compacting concrete (SCC) slabs

Spatial and dynamical handwriting analysis in mild cognitive impairment

Steel fibre spacing in self-compacting concrete precast walls by X-ray computed tomography