Tensile Strain Hardening Behavior of PVA Fiber-Reinforced Engineered Geopolymer Composite

Nematollahi, Behzad; Sanjayan, Jay; Shaikh, Faiz Uddin Ahmed

doi:10.1061/(asce)mt.1943-5533.0001242

Cited by 144 publications

(67 citation statements)

References 49 publications

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“…By comparing with present composite containing 1% PE fibre, it can be seen that, similar level of strain capacity was achieved in PVA fibre reinforced geopolymer composite at 2% volume fractions in a PVA fibre reinforced geopolymer composite [2]. However, the ultimate tensile strength in present PE-FRGC containing 1% PE fibre is slightly lower than that of PVA fibre reinforced geopolymer composite at 2% volume fractions.…”

Section: Resultsmentioning

confidence: 82%

“…[1][2][3]. The resulting strain hardening geopolymer composite and deflection hardening geopolymer composite exhibited superior ductility in terms of high tensile strain capacity and deflection at peak load in uni-axial tension and flexure, respectively [2][3]. Steel and polyvinyl alcohol (PVA) fibres are used to reinforced the above ductile geopolymer composites.…”

Section: Introductionmentioning

confidence: 99%

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Ductile behavior of polyethylene fibre reinforced geopolymer composite

Shaikh

Ronnie

2017

MATEC Web Conf.

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Abstract. This paper presents the effects of various volume fractions of polyethylene (PE) fibres of 0.5%, 1%, 1.5% and 2% on tensile, flexure and compressive behavior of PE fibres reinforced geopolymer composites (PE-FRGC). Results show that the 1% PE fibre by volume is the optimum fibre volume fraction for fly ash geopolymer composite, which exhibit superior strain and deflection hardening behavior in uni-axial tension and threepoint bending, respectively. Results also show that the compressive strength of the composites decreases with increase in volume fractions of PE fibre. The fibre surface examination of PE fibre in the gopolymer matrix using scanning electron microscope (SEM) and energy dispersive spectroscopy (EDS) revealed no significant damage of PE fibre in the alkaline geopolymer matrix.

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Section: Resultsmentioning

confidence: 82%

Section: Introductionmentioning

confidence: 99%

Ductile behavior of polyethylene fibre reinforced geopolymer composite

Shaikh

Ronnie

2017

MATEC Web Conf.

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“…The tensile behavior including post-peak strength and strain capacity of cementitious composites can be drastically improved by fibrous reinforcement [15][16][17]. Furthermore, the addition of micro fibers offers a favorable effect on both strain hardening and multiple cracking behavior [14,18].…”

Section: Introductionmentioning

confidence: 98%

“…As detailed in the overview of Sakulich [28], the lack of information about high performance reinforced AAM was highlighted. Some studies have been conducted to attain a strain hardening behavior of fly ash-based geopolymer composites [17,29,30]. Indeed a brittle geopolymer matrix could have a ductile behavior with an appropriate fiber reinforcement [29].…”

Section: Introductionmentioning

confidence: 99%

High performance cementitious composite from alkali-activated ladle slag reinforced with polypropylene fibers

Nguyen

Carvelli

Adesanya

et al. 2018

Cement and Concrete Composites

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A B S T R A C TAlkali-activated ladle slag (AALS) is a promising cementitious material with environmental benefits. However, the brittleness of material has been limiting the use in construction. Therefore, in this experimental investigation, different polypropylene (PP) fibers were employed as a short randomly reinforcement in cementitious matrix in order to improve mechanical performance of the AALS composites.The study reveals that the AALS composite could gain very high ductility with an appropriate fibrous reinforcement. Fracture energy and fracture toughness of PP fiber reinforced AALS mortars increased by approximately 150 and 7.6 times, respectively, compared to the unreinforced material. Additionally, the flexural strength of the composite increased by roughly 300%. Pseudo strain hardening (PSH) behavior was observed along with multiple cracks under uniaxial tensile test. Scanning electron microscope (SEM) images confirmed the local fiber bridging effect, which resulted in the high mechanical performance of the PP-reinforced AALS.

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“…Recent studies have proved that PVA fibers also present good bond to AAM [12] and may be used to develop composites with improved impact toughness [13] and excellent resistance to freezethaw cycling [14]. Short PVA fibers as a single reinforcement or in hybrid systems may be effective to provide deflectionhardening under flexion or strain-hardening behavior of AAM under direct tension [15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%