Comparative strain and deflection hardening behaviour of polyethylene fibre reinforced ambient air and heat cured geopolymer composites

Shaikh, Faiz Uddin Ahmed; Fairchild, Anthony; Ronnie, Zammar

doi:10.1016/j.conbuildmat.2017.12.175

Cited by 69 publications

(13 citation statements)

References 21 publications

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“…Nematollahi et al [12] investigated the FA-GGBS based SHGC cured at ambient temperature, which had tensile strength and strain capacity of 4.6 MPa and 4.2%, respectively. Shaikh et al [19] compared the mechanical properties of FA-GGBS based SHGC reinforced with PE fibre and the counterpart OPC based composites and found that SHGC exhibited better performance than SHCC and the highest ultimate tensile strain along with maximum crack number was achieved when 0.75%-1.0% PE fibre was incorporated.…”

Section: Introductionmentioning

confidence: 99%

Engineering properties of strain hardening geopolymer composites with hybrid polyvinyl alcohol and recycled steel fibres

Wang

Chan

Leong

et al. 2020

Construction and Building Materials

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Strain hardening geopolymer composite (SHGC) is an alkali-activated material reinforced with randomly dispersed short fibres, which exhibits high ductility and strain hardening and multiple cracking behaviour. This paper presents an experimental study on the effect of hybrid polyvinyl alcohol (PVA) and recycled tyre steel (RTS) fibres on engineering properties of fly ash-slag based SHGC cured at ambient temperature, including flowability, setting time, drying shrinkage, compressive strength and flexural behaviour in terms of stress-deflection response, first-crack strength and flexural strength, flexural toughness and toughening mechanisms. Four mix proportions of specimens with various volume fractions of hybrid PVA and RTS fibres including 1.5% PVA, 2% PVA, 1.75% PVA + 0.25% RTS and 1.5% PVA + 0.5% RTS were considered. The results indicated that the hybridisation of PVA fibre with RTS fibre led to a significant reduction in flowability, setting time and flexural strength of SHGC. However, the resistance to drying shrinkage and compressive strength of SHGC were greatly improved. Moreover, all specimens exhibited the expected deflection hardening behaviour with multiple stable microcracks formed over the tensile face of specimens under four-point bending. The addition of RTS fibre resulted in reduced crack widths in specimens where over 90% of cracks had a width of smaller than 60 μm. The mixture containing 2.0 vol% PVA fibre can be regarded as the optimal mixture for SHGC considering the strengths and deflection (or strain) hardening behaviour.

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Section: Introductionmentioning

confidence: 99%

Engineering properties of strain hardening geopolymer composites with hybrid polyvinyl alcohol and recycled steel fibres

Wang

Chan

Leong

et al. 2020

Construction and Building Materials

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“…The PVA fibers and PE fibers were used to enhance fly ash-slag-based EGC in recent years. [26][27][28][29][30][31][32][33][34] Nematollahi et al 26 compared ambient cured fly ash-slag-based EGC reinforced with 2% PE fibers or 2% PVA fibers by volume. It was found that the EGC reinforced with 2% PE fibers achieved the tensile strain capacity and tensile strength of 5.5% and 3.3 MPa, respectively.…”

Section: Introductionmentioning

confidence: 99%

Mechanical properties of ambient cured fly ash‐slag‐based engineered geopolymer composites with different types of fibers

Sheikh

Feng

et al. 2023

Structural Concrete

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In this paper, low-strength polyvinyl alcohol (L-PVA) fibers, high-strength polyvinyl alcohol (H-PVA) fibers, and polyethylene (PE) fibers were used to prepare ambient cured fly ash-slag-based engineered geopolymer composites (EGC). The effects of fiber types and fiber volume fractions (1.5%, 1.75%, 2.0%, 2.25%, and 2.5%) on the compressive strength and tensile performance of EGC were evaluated. It was found that by increasing the fiber volume fraction from 1.5% to 2.5%, L-PVA fibers had the lowest influence, whereas PE fibers had the highest influence on the compressive strength of EGC. The optimum fiber volume fractions of L-PVA, H-PVA, and PE fibers were 1.75%, 2.25%, and 1.5%, respectively, for EGC to achieve the best tensile performance. Scanning electron microscope (SEM) investigations showed that the bonding performance of PE fibers to the EGC matrix was higher than those of L-PVA and H-PVA fibers to the EGC matrix.

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“…PE can be used as the coating material to produce PE coated bars in concrete [11] and composite rods as steel bars [12]. PE fibers were adopted in the geopolymer composites as the reinforced material [13]. It can act as the matrix to repair structures together with basalt fibers, which have a high paste strength [14].…”

Section: Introductionmentioning

confidence: 99%

Review of Cementitious Composites Containing Polyethylene Fibers as Repairing Materials

et al. 2020

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Polyethylene (PE) is an important polymeric material which is widely used in civil engineering. Recently, engineered cementitious composites (ECCs) have adopted PE fibers in structural repairing. ECC with polyethylene fibers (PE-ECC) has excellent tensile properties, ductility, strain-hardening behavior, thermal performance and durability. In this paper, a systematic review of the cementitious composites with PE fibers is summarized to facilitate the application of PE-ECC. The influence of PE fibers on the properties of ECC, such as compressive strength, flexural behavior, shear properties, impact resistance and tensile properties, is presented. Meanwhile, the properties of PE-ECC repaired structures, such as beams, walls and columns, are described. Further, the self-repairing properties of PE-ECC are presented. Finally, some suggestions for future research are provided in order to apply PE-ECC to practical repairing cases. The review exhibits that PE-ECC is of notable significance to the repairing of structures and clarifies its application scope.

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Comparative strain and deflection hardening behaviour of polyethylene fibre reinforced ambient air and heat cured geopolymer composites

Cited by 69 publications

References 21 publications

Engineering properties of strain hardening geopolymer composites with hybrid polyvinyl alcohol and recycled steel fibres

Engineering properties of strain hardening geopolymer composites with hybrid polyvinyl alcohol and recycled steel fibres

Mechanical properties of ambient cured fly ash‐slag‐based engineered geopolymer composites with different types of fibers

Review of Cementitious Composites Containing Polyethylene Fibers as Repairing Materials

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