Study on fiber hybridization effect of engineered cementitious composites with low- and high-modulus polymeric fibers

Pakravan, Hamid Reza; Jamshidi, Masoud; Latifi, Masoud

doi:10.1016/j.conbuildmat.2016.02.112

Cited by 87 publications

(41 citation statements)

References 20 publications

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“…After the first crack onset, the 2PP-MF and 2PP-SF exhibited PSH behavior under fiber bridging effect with an increase in peak load of 18% and 27%, respectively, in comparison to the initial crack load. Similar results in literature were reported on PP fibers [16,67] or hybrid PP-PVA fibers [35] reinforced Portland cement based ECC. Interestingly, the 2PP-SF absorbed more energy under uniaxial tensile load than the 2PP-MF, while the latter had a smaller softening post-peak branch with a lower strain at failure (see Fig.…”

Section: Uniaxial Tensionsupporting

confidence: 80%

“…In terms of HPFRCC and ECC, PP fiber is usually used along with polyvinyl alcohol (PVA) fiber in order to take advanced of different mechanical and chemical properties [34,35]. The disadvantages of using PVA fibers in cementitious materials are high bonding to the cementitious matrix leading to the fiber breakage during the pull-out process, and comparatively high cost [34].…”

Section: Fibersmentioning

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: Uniaxial Tensionsupporting

confidence: 80%

Section: Fibersmentioning

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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“…6 results, it can be observed that the presence of steel by hybridation process does not offer any extra compressive strength. However, ECC mixes are ductile under compressive load, without losing any fragments around the cubes and this is due to the fiber bridging effect of fibers in the ECC mixes [36]. Fig.…”

Section: Results and Discussion 51 Uniaxial Compression And Young's mentioning

confidence: 99%

Flexural Performance of Hybrid Engineered Cementitious Composite Layered Reinforced Concrete Beams

Krishnaraja

Kandasamy²

2018

Period. Polytech. Civil Eng.

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This paper presents the experimental investigation to evaluate the flexural performance of newly developed hybrid Engineered Cementitious Composite (ECC) layer at tension zone around the main reinforcement of beam. Four different ECC mixes are used in the beam to evaluate the flexural performance, hybrid ECC based on the low modulus poly vinyl alcohol (PVA) and high modulus steel short random fibre reinforcement. The aim of hybridation is to improve the flexural, energy absorption and ductility performance of reinforced concrete beams. In addition to the compressive strength, young’s modulus, uniaxial tensile strength and bond strength of ECC mixes are determined. ECC with PVA fibre with 2.0% volume fraction mix is kept as reference mix, hybridation is made with PVA (1.35%) and steel (0.65%), PVA (1.00%) and steel (1.00%) and finally with PVA (0.65%) and steel (1.35%). This hybridization has a remarkable achievement in mechanical properties and in the flexural behavior in ECC layered RC beam. From the results, it has been observed that mono fiber ECC reinforced with PVA of 2.0% and hybrid fiber ECC reinforced with 1.35 % of PVA fiber and 0.65% of steel fiber has reasonable flexural characteristics than the conventional beam.

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“…It can be seen that the average compressive strength of ECC 3, HECC 1, HECC 2, HECC 4 are higher than that of ECC 1, ECC 2, HECC 3. After 28 days curing, the compressive strength of ECC mix should be around 20-95 MPa as per there commendation of Victor Li [38] and moreover the compressive strength of all ECC mixes are within the range. However, ECC specimens shows high ductile nature and significantly spalling does not occur in the specimens due to the bridging of fibers within the specimen [11].…”

Section: Compressive Strengthmentioning

confidence: 93%

Study on impact of fiber hybridization in material properties of engineered cementitious composites

Krishnaraja¹,

Anandakumar²,

Jegan³

et al. 2019

Matéria (Rio J.)

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ABSTRATO Compósito Cimentício Projetado (ECC) é um tipo de compósitos cimentícios reforçados com fibras de alto desempenho melhorados com bom comportamento de tração, compressão e flexão. O ECC é conhecido por seu comportamento de endurecimento de tensão sob tensão e tem sido cada vez mais aplicado na prática de engenharia. O processo de adicionar duas ou mais fibras em uma mistura é conhecido como hibridização. Os drives de compósitos híbridos se beneficiam de cada uma das fibras individuais adicionadas e exibem maior capacidade de resistência e deformação em comparação com os compostos de fibra monofibra. As principais aplicações da CEC são um reforço estrutural na construção e também a hibridização de fibras orgânicas são válidas apenas para condições subaquáticas e fornecerão testes adicionais relativos à capacidade de combus-tão ou inflamabilidade. Este trabalho apresenta os resultados obtidos a partir de três misturas de ECC (PVA, PP, STEEL) e quatro Compósitos Cimentícios Híbridos de Engenharia (HECC) com diferentes combinações de fração volumétrica com PVA, PP, STEEL. Os estudos experimentais foram realizados para investigar os comportamentos mecânicos de CEC e HECC. Os resultados indicam que este processo de hibridação tem um desempenho notável na resistência à compressão, resistência à tração direta e resistência à flexão.

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Study on fiber hybridization effect of engineered cementitious composites with low- and high-modulus polymeric fibers

Cited by 87 publications

References 20 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

Flexural Performance of Hybrid Engineered Cementitious Composite Layered Reinforced Concrete Beams

Study on impact of fiber hybridization in material properties of engineered cementitious composites

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