Use of recycled fibers in concrete composites: A systematic comprehensive review

Ahmed, Hemn Unis; Faraj, Rabar H.; Hilal, Nahla; Mohammed, Azad A.; Sherwani, Aryan Far H.

doi:10.1016/j.compositesb.2021.108769

Cited by 136 publications

(53 citation statements)

References 153 publications

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“…The Young modulus is considered one of the significant material characteristics employed in the design of structural concrete elements since it offers valuable indications about the deformation capacity of concrete in the elastic limit [53,54]. Figure 6 showed the 28 days static elastic modulus of UHPFRC via two curing types and various binder contents.…”

Section: Modulus Of Elasticitymentioning

confidence: 99%

Mechanical and Fracture Parameters of Ultra-High Performance Fiber Reinforcement Concrete Cured via Steam and Water: Optimization of Binder Content

et al. 2021

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An investigational study is conducted to examine the effects of different amounts of binders and curing methods on the mechanical behavior and ductility of Ultra-High Performance Fiber Reinforced Concretes (UHPFRCs) that contain 2% of Micro Steel Fiber (MSF). The aim is to find an optimum binder content for the UHPFRC mixes. The same water-to-binder ratio (w/b) of 0.12 was used for both water curing (WC) and steam curing (SC). Based on the curing methods, two series of eight mixes of UHPFRCs containing different binder contents ranging from 850 to 1200 kg/m3 with an increment of 50 kg/m3 were produced. Mechanical properties such as compressive strength, splitting tensile strength, static elastic module, flexural tensile strength and the ductility behavior were investigated. This study revealed that the mixture of 1150 kg/m3 binder content exhibited the highest values of the experimental results such as a compressive strength greater than 190 MPa, a splitting tensile strength greater than 12.5 MPa, and a modulus of elasticity higher than 45 GPa. The results also show that all of the improvements began to slightly decrease at 1200 kg/m3 of the binder content. On the other hand, it was concluded that SC resulted in higher mechanical performance and ductility behavior than WC.

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Section: Modulus Of Elasticitymentioning

confidence: 99%

Mechanical and Fracture Parameters of Ultra-High Performance Fiber Reinforcement Concrete Cured via Steam and Water: Optimization of Binder Content

et al. 2021

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“…As it is well known, the morphology and properties of polymeric fibers vary notably with the nature and source of the fibers [ 44 , 83 ]. The most used RPF in R-FRC are PP and PET, due to their high availability in municipal wastes.…”

Section: Recycled Fiber Reinforced Composites (R-frc)mentioning

confidence: 99%

“…Recycling the waste to produce new materials, like concrete or mortar, has been raised as one of the best solutions, due to economic and ecological advantages as well as energy saving in their disposal [ 34 , 35 ]. Therefore, the interest of using recycled fibers (mainly steel and polymeric fibers) in FRC is increasing, as shown in recent reviews [ 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 , 45 ]. The most promising approach to improve reinforced concrete composites is hybridization [ 7 ] and although many studies have been carried out using recycled fibers, the generated knowledge is fragmented.…”

Section: Introductionmentioning

confidence: 99%

Recycled Fibers for Sustainable Hybrid Fiber Cement Based Material: A Review

et al. 2021

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Reinforcing fibers have been widely used to improve physical and mechanical properties of cement-based materials. Most fiber reinforced composites (FRC) involve the use of a single type of fiber to improve cement properties, such as strength or ductility. To additionally improve other parameters, hybridization is required. Another key challenge, in the construction industry, is the implementation of green and sustainable strategies based on reducing raw materials consumption, designing novel structures with enhanced properties and low weight, and developing low environmental impact processes. Different recycled fibers have been used as raw materials to promote circular economy processes and new business opportunities in the cement-based sector. The valuable use of recycled fibers in hybrid FRC has already been proven and they improve both product quality and sustainability, but the generated knowledge is fragmented. This is the first review analyzing the use of recycled fibers in hybrid FRC and the hybridization effect on mechanical properties and workability of FRC. The paper compiles the best results and the optimal combinations of recycled fibers for hybrid FRC to identify key insights and gaps that may define future research to open new application fields for recycled hybrid FRC.

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“…The inertia of fibers further makes them easily aggregate in the cement matrix, leading to the poor dispersion that is detrimental to the mechanical properties of FRCC. In addition, the inclusion of microfibers tends to induce extra air voids in concrete during the casting process and results in a reduction in compressive strength [13,14]. In this context, the advancements of nanotechnology and nanomaterials have brought tremendous opportunities to enhance the overall performance of concrete and FRCC.…”

Section: Introductionmentioning

confidence: 99%

Application of Graphene in Fiber-Reinforced Cementitious Composites: A Review

Qureshi

Wang

2021

Energies

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Graphene with fascinating properties has been deemed as an excellent reinforcement for cementitious composites, enabling construction materials to be smarter, stronger, and more durable. However, some challenges such as dispersion issues and high costs, hinder the direct incorporation of graphene-based reinforcement fillers into cementitious composites for industrial production. The combination of graphene with conventional fibers to reinforce cement hence appears as a more promising pathway especially towards the commercialization of graphene for cementitious materials. In this review paper, a critical and synthetical overview on recent research findings of the implementation of graphene in fiber-reinforced cementitious composites was conducted. The preparation and characterization methods of hybrid graphene-fiber fillers are first introduced. Mechanical reinforcing mechanisms are subsequently summarized, highlighting the main contribution of nucleation effect, filling effect, interfacial bonding effect, and toughening effect. The review further presents in detail the enhancements of multifunctional properties of graphene-fiber reinforced cementitious composites, involving the interfacial properties, mechanical properties, durability, electrical conductivity, and electromagnetic interference shielding. The main challenges and future prospects are finally discussed to provide constructive ideas and guidance to assist with relevant studies in future.

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Use of recycled fibers in concrete composites: A systematic comprehensive review

Cited by 136 publications

References 153 publications

Mechanical and Fracture Parameters of Ultra-High Performance Fiber Reinforcement Concrete Cured via Steam and Water: Optimization of Binder Content

Mechanical and Fracture Parameters of Ultra-High Performance Fiber Reinforcement Concrete Cured via Steam and Water: Optimization of Binder Content

Recycled Fibers for Sustainable Hybrid Fiber Cement Based Material: A Review

Application of Graphene in Fiber-Reinforced Cementitious Composites: A Review

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