A feasibility study of strain hardening fiber reinforced fly ash-based geopolymer composites

Ohno, Motohiro; Li, Victor C.

doi:10.1016/j.conbuildmat.2014.02.005

Cited by 230 publications

(96 citation statements)

References 10 publications

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“…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]. Pseudo strain hardening (PSH) behavior (i.e., strain hardening behavior of brittle matrix attained by fiber reinforcement) was reported with deformation over 4% during tensile test [29,30].…”

Section: Introductionmentioning

confidence: 99%

“…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%

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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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Section: Introductionmentioning

confidence: 99%

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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“…The alkaline activators consisted of sodium hydroxide and sodium silicate solutions (Na 2 O = 14.7%, SiO 2 = 29.4%; H 2 O = 55.9% wt.). A very fine natural river sand was used (sieved to pass 600 µm), which is a common grading for fiber reinforced PVA composites [17][18]. The short PVA fibers were supplied by Kuraray Japan; its geometry and properties are shown in Table 2.…”

Section: Methodsmentioning

confidence: 99%

“…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%

The effect of the alkaline solution content on the mechanical properties of MK-based PVA fiber-reinforced geopolymers

Borges¹,

Bhutta²,

Bavuzo³

et al. 2017

Epitoanyag - JSBCM

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“…The reinforcement of AABs by different fibers have not been widely reported. OHNO and LI studied the tensile and the compressive strength of randomly oriented short Poly-Vinyl-Alcohol (PVA) fiberreinforced AABs [18]. PUERTAS et al reported that incorporation of polypropylene fibers leads to an improvement of the compressive strength [19].…”

Section: Introductionmentioning

confidence: 99%

The Durability and Performance of Short Fibers for a Newly Developed Alkali-Activated Binder

Funke¹,

Gelbrich²,

Kroll³

2016

Fibers

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This study reports the development of a fiber-reinforced alkali-activated binder (FRAAB) with an emphasis on the performance and the durability of the fibers in the alkaline alkali-activated binder (AAB)-matrix. For the development of the matrix, the reactive components granulated slag and coal fly ash were used, which were alkali-activated with a mixture of sodium hydroxide (2-10 mol/L) and an aqueous sodium silicate solution (SiO2/Na2O molar ratio: 2.1) at ambient temperature. For the reinforcement of the matrix integral fibers of alkali-resistant glass (AR-glass), E-glass, basalt, and carbon with a fiber volume content of 0.5% were used. By the integration of these short fibers, the three-point bending tensile strength of the AAB increased strikingly from 4.6 MPa (no fibers) up to 5.7 MPa (carbon) after one day. As a result of the investigations of the alkali resistance, the ARglass and the carbon fibers showed the highest durability of all fibers in the FRAAB-matrix. In contrast to that, the weight loss of E-glass and basalt fibers was significant under the alkaline condition. According to these results, only the AR-glass and the carbon fibers reveal sufficient durability in the alkaline AAB-matrix.

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A feasibility study of strain hardening fiber reinforced fly ash-based geopolymer composites

Cited by 230 publications

References 10 publications

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

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

The effect of the alkaline solution content on the mechanical properties of MK-based PVA fiber-reinforced geopolymers

The Durability and Performance of Short Fibers for a Newly Developed Alkali-Activated Binder

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