Effect of mix design methods on the mechanical properties of steel fibre-reinforced concrete prepared with recycled aggregates from precast waste

Anike, Emmanuel Ejiofor; Saïdani, Messaoud; Olubanwo, Adegoke; Tyrer, Mark; Ganjian, Eshmaiel

doi:10.1016/j.istruc.2020.05.038

Cited by 22 publications

(5 citation statements)

References 48 publications

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“…Mx3 mixture had the lowest water absorption and apparent porosity values. It was observed by Anike et al [20] that metal fiber-reinforced recycled aggregate concrete and metal fiber-reinforced blended aggregate concrete had 49% and 8.8% higher absorptions, respectively, compared to control concrete. Void content, which explains entrapped macroporosity, was reported to increase with the addition of fibers [21,22].…”

Section: Physical Propertiesmentioning

confidence: 90%

Reuse of Industrial Metal Wastes as Partial Replacement of Aggregates in Mortar Production

Gülmez¹

2021

DÜMF Mühendislik Dergisi

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Sustainable waste management is becoming more and more important in the construction industry due to increasing waste costs as well as environmental effects. As a result of increasing level of wastes and environmental damage, the use of these wastes has become the focus for beneficial construction activities and sustainable industrial applications. This study presents experimental results on the effect of industrial wastes on the performance of cementitious mixtures. The scope of this study, therefore, was to assess the effect of waste aluminium on physical and mechanical properties of cement based mixtures prepared in different compositions. Consistency, bulk density, porosity, absorption, flexural and compressive strength tests were carried out on mixtures produced by using waste aluminium aggregates in different percentages instead of fine aggregate. Results showed that mixtures prepared with 4% aluminium aggregates had the highest water absorption and porosity. With the addition of %1 lathe waste, it was observed that the flexural behavior of mortar was maximum and the optimum percentage for flexural strength was noted. In addition, when mixtures produced with the same percentage of aluminium were compared, the amount of binder played a significant role on both compressive and flexural strength. Results have shown that to incorporate aluminium into mixtures can be a suitable solution for recycling in industrial applications.

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Section: Physical Propertiesmentioning

confidence: 90%

Reuse of Industrial Metal Wastes as Partial Replacement of Aggregates in Mortar Production

Gülmez¹

2021

DÜMF Mühendislik Dergisi

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“…The strength of SFRC showed a certain downward trend as the steel fiber percentage reached 2.0%. This is because excessive steel fiber causes a small amount of agglomeration, resulting in a 'balling effect' in concrete [43]. Additionally, the concrete slurry becomes insufficient, which thus reduces the filling and wrapping effect.…”

Section: Triaxial Compressive Strengthmentioning

confidence: 99%

“…However, the reinforcement of the specimens containing 2.0% steel fibers was less effective than that of the specimens containing 1.0%. This phenomenon might be brought on by the overuse of steel fiber in concrete mixing, which makes it not easy to disperse evenly and agglomerate easily [43]. The influence of steel fiber content on the stress-strain behavior of concrete specimens is shown in Figure 13.…”

Section: Axial Stress-strain Behaviormentioning

confidence: 99%

Experimental Investigation on the Dynamic Mechanical Properties and Microstructure Deterioration of Steel Fiber Reinforced Concrete Subjected to Freeze–Thaw Cycles

Wang

Xiong

et al. 2022

Buildings

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In this study, the dynamic mechanical properties of steel fiber reinforced concrete under the influence of freeze–thaw cycles were studied. The studied parameters include steel fiber content (0%, 1% and 2%), confining pressures (0, 5 and 10 MPa) and strain rates (10−5/s, 10−4/s, 10−3/s and 10−2/s). Performance was also evaluated, including triaxial compressive strength, peak strain, the relationship between stress and strain, failure mode and microstructure. The results show that with the increase in F–T cycles, the compressive strength and energy absorption capacity of concrete gradually decrease. The mechanical properties of concrete increased with the addition of steel fibers during F–T cycles, and the optimum amount of steel fiber to enhance resistance to F–T cycles is 1% within the evaluation range. In this study, the effects of strain rate and confining pressure on the strength and failure mode of concrete after fiber addition are studied. Both the dynamic increase factor and the concrete strength increase linearly with the increase of strain rate, the dynamic increase factor is characterized by an increase in intensity caused by strain rate. When there is no confining, the crack direction of the concrete specimen is parallel to the stress loading direction, and when there is confining, it is manifested as oblique shear failure. The results of scanning electron microscopy analysis of the microstructure demonstrate the performance results at the macroscopic level (compressive strength and peak strain).

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“…In this context, various techniques, including pre-soaking in acid, mechanical grinding, presoaking in water, pozzolan slurry, heat grinding, polymer emulsion, carbonation, and calcium carbonate bio deposition, were used to enhance the performance of RAC [37][38][39][40][41][42]. A variety of fibres were also used to improve the deformation, bending, compressive, ductility, toughness, impact, and fatigue performance of RAC [43][44][45][46][47][48]. Steel fibre-reinforced RAC with 25% coarse natural aggregates (CNA) replaced with coarse recycled aggregates (CRA) showed a 13% rise in compressive strength for a 0.75% steel fibre dosage [45].…”

Section: Introductionmentioning

confidence: 99%

Axial Stress-Strain Performance of Recycled Aggregate Concrete Reinforced with Macro-Polypropylene Fibres

Munir

Kazmi

et al. 2021

Sustainability

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The addition of macro-polypropylene fibres improves the stress-strain performance of natural aggregate concrete (NAC). However, limited studies focus on the stress-strain performance of macro-polypropylene fibre-reinforced recycled aggregate concrete (RAC). Considering the variability of coarse recycled aggregates (CRA), more studies are needed to investigate the stress-strain performance of macro-polypropylene fibre-reinforced RAC. In this study, a new type of 48 mm long BarChip macro-polypropylene fibre with a continuously embossed surface texture is used to produce BarChip fibre-reinforced NAC (BFNAC) and RAC (BFRAC). The stress-strain performance of BFNAC and BFRAC is studied for varying dosages of BarChip fibres. Results show that the increase in energy dissipation capacity (i.e., area under the curve), peak stress, and peak strain of samples is observed with an increase in fibre dosage, indicating the positive effect of fibre addition on the stress-strain performance of concrete. The strength enhancement due to the addition of fibres is higher for BFRAC samples than BFNAC samples. The reduction in peak stress, ultimate strain, toughness and specific toughness of concrete samples due to the utilisation of CRA also reduces with the addition of fibres. Hence, the negative effect of CRA on the properties of concrete samples can be minimised by adding BarChip macro-polypropylene fibres. The applicability of the stress-strain model previously developed for macro-synthetic and steel fibre-reinforced NAC and RAC to BFNAC and BFRAC is also examined.

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Effect of mix design methods on the mechanical properties of steel fibre-reinforced concrete prepared with recycled aggregates from precast waste

Cited by 22 publications

References 48 publications

Reuse of Industrial Metal Wastes as Partial Replacement of Aggregates in Mortar Production

Reuse of Industrial Metal Wastes as Partial Replacement of Aggregates in Mortar Production

Experimental Investigation on the Dynamic Mechanical Properties and Microstructure Deterioration of Steel Fiber Reinforced Concrete Subjected to Freeze–Thaw Cycles

Axial Stress-Strain Performance of Recycled Aggregate Concrete Reinforced with Macro-Polypropylene Fibres

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