Restrained Shrinkage Cracking of Fiber-Reinforced High-Strength Concrete

Saradar, Ashkan; Tahmouresi, Behzad; Mohseni, Ehsan; Shadmani, Ali

doi:10.3390/fib6010012

Cited by 74 publications

(34 citation statements)

References 33 publications

(32 reference statements)

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“…So, when tensile cracking dominates concrete behaviour, it is required to use appropriate additions with a strain-hardening response under tensile loading [31,32]. Fibres are known for their tensile strength capacity and they have been widely used to improve the resistance to tensile stress and concrete spalling [33][34][35][36]. So, the tensile and flexural strength of concrete materials can be remarkably improved by adding a low volume of fibres, while a moderate increase can occur in the compressive strength of fibre reinforced concrete due to a high strain-hardening response of fibres under tensile loading.…”

Section: Concrete Is One Of Most Popular Construction Materials and Imentioning

confidence: 99%

Effect of the curing type on the mechanical properties of lightweight concrete with polypropylene and steel fibres

Madandoust

Kazemi

Talebi

et al. 2019

Construction and Building Materials

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This study assessed the effect of steel and polypropylene fibres at various volume contents on concrete incorporating lightweight expanded clay aggregate (LECA) and water/binder (W/B) ratios of 0.37 and 0.42. The concrete specimens were cured under six curing conditions: wet, 3-day wet, 14-day wet, air-dry controlled, air-dry uncontrolled, and 90 °C vapour. The use of lightweight aggregates in the construction industry has drawn the attention of researchers and, on the other hand, fibres with a high strain-hardening response can be used as an appropriate addition in concrete materials. In this study, the mechanical properties of lightweight concrete containing steel or polypropylene fibres were evaluated by means of compressive strength, splitting tensile strength and modulus of elasticity tests at 3, 7, 28 and 60 days. According to the results, fibre reinforced concrete mixes containing LECA, cured under 90 °C vapour curing, achieved the highest mechanical strength. In addition, the optimum contents of steel fibres to obtain the highest compressive and splitting tensile strengths of lightweight concrete were 1% and 3%, respectively.

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Section: Concrete Is One Of Most Popular Construction Materials and Imentioning

confidence: 99%

Effect of the curing type on the mechanical properties of lightweight concrete with polypropylene and steel fibres

Madandoust

Kazemi

Talebi

et al. 2019

Construction and Building Materials

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“…Furthermore, Jiang et al [ 103 ] found that longer fibers outperform shorter ones in improving splitting tensile and flexural strengths. Saradar et al [ 159 ] investigated the flexural strength of 12 mm long basalt, steel, glass, PP, and PO fibers with 0.1% of volume fraction. The study reported that all the fibers increased the flexural strength of concrete, however, basalt and steel fibers made the highest contribution followed by PO, glass, and PP fibers.…”

Section: Pre-peak Mechanical Propertiesmentioning

confidence: 99%

State-of-the-Art Review of Capabilities and Limitations of Polymer and Glass Fibers Used for Fiber-Reinforced Concrete

et al. 2021

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The concrete industry has long been adding discrete fibers to cementitious materials to compensate for their (relatively) low tensile strengths and control possible cracks. Extensive past studies have identified effective strategies to mix and utilize the discrete fibers, but as the fiber material properties advance, so do the properties of the cementitious composites made with them. Thus, it is critical to have a state-of-the-art understanding of not only the effects of individual fiber types on various properties of concrete, but also how those properties are influenced by changing the fiber type. For this purpose, the current study provides a detailed review of the relevant literature pertaining to different fiber types considered for fiber-reinforced concrete (FRC) applications with a focus on their capabilities, limitations, common uses, and most recent advances. To achieve this goal, the main fiber properties that are influential on the characteristics of cementitious composites in the fresh and hardened states are first investigated. The study is then extended to the stability of the identified fibers in alkaline environments and how they bond with cementitious matrices. The effects of fiber type on the workability, pre- and post-peak mechanical properties, shrinkage, and extreme temperature resistance of the FRC are explored as well. In offering holistic comparisons, the outcome of this study provides a comprehensive guide to properly choose and utilize the benefits of fibers in concrete, facilitating an informed design of various FRC products.

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“…Once exposed, cracking would make the retrofitting unreliable if the beam was still exposed to the environment. Luckily, if the metal content and length are increased, shrinkage crack surfaces are considerably reduced, up to 86% compared to non-fiber specimens [24]. With timely crack detection, these cracks can be identified and repaired before significant damage to the inner fibers occurs.…”

Section: Uhpcmentioning

confidence: 99%

RFID-Based Crack Detection of Ultra High-Performance Concrete Retrofitted Beams

Bruciati

Jang

Fils

2019

Sensors

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Ultra-high-performance concrete (UHPC) is a novel material with multiple known uses and many still yet to be discovered. Recently, the use of encasing welded shear studs in UHPC on the web of corroded steel beams was developed. This creates a bearing force transfer mechanism to bypass the corroded web plate. This new material and its uses come with many uncertainties in the short and long term. Structural health monitoring (SHM) can be a tool to observe the development. Specifically, radio frequency technology (RFID) can be used. RFID has existed commercially since the 1960s and has been used as a crack sensor before, but never with UHPC. RFID-based crack sensing is being used to monitor the UHPC retrofit. A crack is simulated on the UHPC specimen and then a commercial, low cost tag is secured. Using backscatter power, the tag reads the crack existence and its increasing volume with every new damage stage. Using a damage index, comparing the uncracked and each cracked stage, this method is not restricted to the raw received signal strength indicator (RSSI), which could be different at each tag. With this sensor, the small cracks that occur in UHPC during its creation can be monitored to ensure the capacity of the retrofitting is maintained. The tested RFID-based crack sensor can be used on various other forms of UHPC.

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Restrained Shrinkage Cracking of Fiber-Reinforced High-Strength Concrete

Cited by 74 publications

References 33 publications

Effect of the curing type on the mechanical properties of lightweight concrete with polypropylene and steel fibres

Effect of the curing type on the mechanical properties of lightweight concrete with polypropylene and steel fibres

State-of-the-Art Review of Capabilities and Limitations of Polymer and Glass Fibers Used for Fiber-Reinforced Concrete

RFID-Based Crack Detection of Ultra High-Performance Concrete Retrofitted Beams

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