Recycling of steel fibres and spent equilibrium catalyst in ultra-high performance concrete: Literature review, research gaps, and future development

Abdolpour, Hassan; Niewiadomski, Paweł; Sadowski, Łukasz

doi:10.1016/j.conbuildmat.2021.125147

Cited by 21 publications

(9 citation statements)

References 110 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…When the concrete specimen is loaded, the micro cracks converge, expand, and penetrate the matrix, eventually causing overall cracking damage of the specimen. After the incorporation of BCSFs into UHPC, the expansion of cracks in the UHPC will be hindered by the expansion from the BCSFs; the size of the hindering force is related to the amount of BCSFs incorporated [ 32 ], and with the matrix cracking, BCSFs can still play a bridging role, making it a larger slow crack expansion before the damage [ 19 ]. The displacement of the open end of the crack decreases with the increase in BCSFs.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Comparison of the Mechanical Properties and Crack Expansion Mechanism of Different Content and Shapes of Brass-Coated Steel Fiber-Reinforced Ultra-High-Performance Concrete

Jiang

et al. 2023

Materials

View full text Add to dashboard Cite

Steel fiber-reinforced ultra-high-performance concrete (UHPC) is becoming an important type of concrete reinforcement. After mixing with the reinforced steel fibers, the UHPC has perfect flex resistance, shear strength, crack resistance, shock resistance, and anti-seepage. In this study, the influence of straight, corrugated, and hooked brass-coated steel fibers (BCSFs) on the microstructure, mechanical properties, and crack expansion mechanism of ultra-high-performance concrete (UHPC) with varying content of 1–6 wt.% under different curing times were investigated. Field emission scanning electron microscopy and energy dispersive X-ray spectrometry were employed to characterize the microstructure of the BCSF-reinforced UHPC mix specimens. X-ray computed tomography was employed to determine the porosity of the BCSF-reinforced UHPC mix specimens. The obtained results indicate the flexural strength and compressive strength of BCSF-reinforced UHPC mix specimens are enhanced, along with increasing the content of BCSFs reinforcement with different shapes (straight, corrugated, and hooked). The embedded BCSFs play a major role in the adhesive property and stress transfer of the BCSFs–UHPC matrix interface. Different from many studies, the flexural strength of mix UHPC with straight BCSFs is higher than those with corrugated and hooked BCSFs. However, the compressive strength of UHPC with corrugated BCSFs is higher than those with straight and hooked BCSFs. The flexural strength of mix UHPC with 6 wt.% straight BCSFs at 28 days reaches the maximum value of 26.2 MPa, and the compressive strength of UHPC with 6 wt.% corrugated BCSFs at 28 days reaches the maximum value of 142.3 MPa. With the increase in straight BCSF content from 1 wt.% to 6 wt.%, the porosity in mix UHPC reduces gradually from 18.4% to 8.3%. The length of average crack spacing is dependent on the straight BCSF content. With the increase in straight BCSF content from 1 wt.% to 6 wt.%, the average crack length reduces gradually from 34.2 mm to 12.1 mm, and the average crack width reduces gradually from 0.78 mm to less than 0.1 mm. During crack extension, part of the energy in the UHPC mixture specimen with the 6 wt.% BCSF content flows into the crack tip region converted into the work dissipated during the bridging process. The crack propagation resistance of the UHPC mixture with straight BCSFs was improved compared with those with corrugated and hooked BCSFs. The bond strength between the BCSFs and UHPC matrix was enhanced by using vibrational mixing, and the brass film coated on the BCSFs contributes to increase the flexural and compressive strength of the UHPC mixture.

show abstract

Section: Resultsmentioning

confidence: 99%

“…Ravichandran reviewed the influence of fibers on the fresh and hardened properties of UHPC [ 31 ]. Abdolpour reviewed the recycling of steel fibers and spent equilibrium catalysts in ultra-high-performance concrete [ 32 ]. Wang reviewed the fresh and rheological characteristics of fiber-reinforced concrete [ 33 ].…”

Section: Introductionmentioning

confidence: 99%

Comparison of the Mechanical Properties and Crack Expansion Mechanism of Different Content and Shapes of Brass-Coated Steel Fiber-Reinforced Ultra-High-Performance Concrete

Jiang

et al. 2023

Materials

View full text Add to dashboard Cite

show abstract

“…However, these materials are widely available in waste, and reusing these waste materials could solve the problem encountered in the preparation of electrode materials in supercapacitors. 209 Therefore, the following section describes the reuse of waste to electrode materials for supercapacitors.…”

Section: Waste To Wealth In Energy Storagementioning

confidence: 99%

Waste to wealth: direct utilization of spent materials for electrocatalysis and energy storage

Yan

Jiang

et al. 2023

Green Chem.

View full text Add to dashboard Cite

show abstract

“…Among the most effective solutions for improving the performance of high-performance concrete is the incorporation of steel fibers, which have been extensively proven to deliver remarkable improvements in various properties, such as compressive and flexural strength, toughness, ductility, and crack resistance [1][2][3]. Furthermore, steel fibers can be utilized to prevent reinforcement congestion, reduce implementation costs, and contribute to the sustainable use of resources [4,5].…”

Section: Introductionmentioning

confidence: 99%

Physicomechanical Behavior of High-Performance Concrete Reinforced with Recycled Steel Fibers from Twisted Cables in the Brittle State—Experimentation and Statistics

Chetbani,

Zaitri,

Tayeh

et al. 2023

Buildings

View full text Add to dashboard Cite

This research studied the effect of recycled steel fibers extracted from twisted cable waste on the fresh and hardened states of high-performance concretes. Accordingly, slump, water absorption (WA), compressive strength (CS), flexural strength (FS), and split tensile strength (STS) were measured in the laboratory using mixtures generated by the response surface methodology (RSM). The RSM-based central composite design (CCD) was used to assess the influence of water-to-binder (W/B) ratios from 0.27 to 0.31, length-to-diameter (L/d = 46 to 80) and steel fiber content (SFC) in the range of 19 to 29 kg/m3 on the behavior of high-performance fiber-reinforced concrete (HPFRC). The accuracy and validation of the generated models were evaluated by employing analysis of variance (ANOVA) and optimal parameters. The experimental findings revealed that the use of an L/d ratio of 63, a W/B ratio of approximately 0.28, and an SFC of around 22 kg/m3 resulted in high workability in terms of slump. While a notable increase in compressive strength was observed when employing an L/d ratio of approximately 70, a W/B ratio of around 0.28, and the maximum SFC of 29 kg/m3, as confirmed by scanning electron microscopy (SEM) and X-ray diffraction (XRD) analysis.

show abstract

Recycling of steel fibres and spent equilibrium catalyst in ultra-high performance concrete: Literature review, research gaps, and future development

Cited by 21 publications

References 110 publications

Comparison of the Mechanical Properties and Crack Expansion Mechanism of Different Content and Shapes of Brass-Coated Steel Fiber-Reinforced Ultra-High-Performance Concrete

Comparison of the Mechanical Properties and Crack Expansion Mechanism of Different Content and Shapes of Brass-Coated Steel Fiber-Reinforced Ultra-High-Performance Concrete

Waste to wealth: direct utilization of spent materials for electrocatalysis and energy storage

Physicomechanical Behavior of High-Performance Concrete Reinforced with Recycled Steel Fibers from Twisted Cables in the Brittle State—Experimentation and Statistics

Contact Info

Product

Resources

About