Workability, strength and flexural toughness properties of hybrid steel fiber reinforced SCC with high-volume fiber

Türk, Kâzım; Başsürücü, Mahmut; Bitkin, Rifat Enes

doi:10.1016/j.conbuildmat.2020.120944

Cited by 72 publications

(27 citation statements)

References 26 publications

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“…Concrete is one of the most widely used building materials due to its cost and unique properties [1][2][3]. However, plain concrete is susceptible to cracking because of its brittle nature and has relatively low failure strain [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Effect of fiber hybridization on mechanical properties of concrete

Biolzi

Carvelli

2022

Mater Struct

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Ten concrete mixtures, using long and medium length hooked-end and short wave-shaped steel fibers, were designed to experimentally investigate the effect of hybrid reinforcement on workability, drying shrinkage, and mechanical properties of hybrid steel fiber reinforced concrete. The steel fibers reduced the workability and drying shrinkage. Hybrid fibers, including long hooked-end steel fiber, can produce a synergistic effect on compressive strength. For the adopted materials, a linear relationship was observed between shrinkage strain and compressive strength. The tensile splitting strength increased with the volume fraction of the hybrid fibers. The hybrid steel fibers generated a synergistic effect on the tensile splitting strength, with an almost constant ratio of tension splitting strength to compressive strength of hooked-end steel fiber reinforced concrete. The use of long hooked-end steel fiber reinforcement led to a higher modulus of rupture, residual strength, and toughness than other mono fibers. Flexural strength increased with the increasing volume fraction of hybrid fibers. Residual strength of hybrid steel fiber reinforced concrete varied with fiber hybridization. Overall, a concrete reinforced with a hybrid mix of all the considered steel fibers had the best performance among the considered ones.

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Section: Introductionmentioning

confidence: 99%

Effect of fiber hybridization on mechanical properties of concrete

Biolzi

Carvelli

2022

Mater Struct

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“…Bunun yanında, birçok üstün özelliklere sahip olan KYB'nin gevrek özelliğinden dolayı çekme dayanımı ve eğilme performansı düşüktür. Bu gibi dezavantajlarını ortadan kaldırılması amacıyla tekli ve karma lif takviyeli KYB ile ilgili birçok çalışmalarda yürütülmektedir [11][12][13]14,38,39]. Lif takviyeli beton ile ilgili ilk çalışmalar 20. yüzyılın ortalarında çelik lif takviye edilen betonun mekanik davranışını incelemek amacıyla yapılmıştır [4].…”

Section: Introductionunclassified

“…sebebiyle, 28 günlük numunelerin eğilme tokluğu değerlerine kıyasla eğilme tokluğu değerleri artışında azalma görülmüştür. Literatürde yer alan bazı çalışmalarda[35][36][37][38][39][40] da bulguları destekleyen sonuçlar bulunmuştur. Karışımlara ait eğilme tokluğu faktörü değerleri Lifli KYB numunelerine ait eğilme deneylerinden elde edilen yük-sehim eğrileri Şekil 11'de gösterilmiştir.…”

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Investigation of Workability and Engineering Properties of Hybrid Fiber Reinforced SCC Mixtures

Türk

Katlav

Turğut

2022

Bitlis Eren Üniversitesi Fen Bilimleri Dergisi

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Bu çalışmada, benzer işlenebilirliğe sahip farklı boyut (makro ve mikro) ve narinlikteki çelik lif takviyeli kendiliğinden yerleşen beton (KYB) karışımların mühendislik ve işlenebilirlik özellikleri araştırılmıştır. Bu amaçla, lifsiz, sadece makro lif ve karma lif içeren KYB olmak üzere toplamda üç adet karışım tasarlanmıştır. Lifli KYB karışımları, EFNARC (2002) komitesi tarafından önerilen kriterlere göre mümkün olan benzer işlenebilirlik esas alınarak elde edilmiştir. Bu sebeple, çökme-yayılma, t500 ve J-halkası işlenebilirlik testleri yapılmıştır. Elde edilen lifli KYB karışımlarından 3, 28 ve 90 günlük basınç, yarmada çekme ve eğilmede çekme dayanımlarının belirlenmesi için numuneler hazırlanmış ve standartlara uygun şekilde test edilmiştir. Sonuç olarak, karışıma hem tekli hem de karma lif ilave edilmesi, karışımların işlenebilirlik özelliklerini olumsuz etkilemiştir. Bunun yanında, KYB karışımlarına narinliği 87 olan düz mikro çelik liflerin ilave edilmesinin basınç ve yarmada çekme dayanımlarında, narinliği 65 olan kancalı uçlu makro çelik liflerin ilave edilmesinin ise eğilmede çekme dayanımı değerlerinde olumlu bir etkiye sahip olduğu bulunmuştur.

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“…Chun et al (2019) discussed the impact of mixed use of macro-and microsteel fibers on the pullout and tensile properties of UHPC. Kazim et al (Turk et al, 2021) studied the effects of macro-and microsteel fiber mixing with different volume contents on the mechanical properties of selfcompacting concrete. The test results showed that the hybridreinforced concrete specimen showed excellent ductility compared with the single macrosteel fiber-reinforced concrete specimen.…”

Section: Introductionmentioning

confidence: 99%

“…Steel fibers, as a kind of fiber that are seeing great attention worldwide, are widely studied by many researchers since they can improve the toughness of concrete (Kim et al, 2011;Yoo et al, 2017;Fantilli et al, 2018;Yoo et al, 2020). There are also many reports about polymer-polymer hybrid fibers (Ahmed et al, 2011;Silva et al, 2013;Pan et al, 2015;Banyhussan et al, 2016;Gong et al, 2020;Sükrü et al, 2020;Turk et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Tensile Behavior of Hybrid Fiber-Reinforced Ultra-High-Performance Concrete

Deng

2021

Front. Mater.

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Thirty dog bone-shaped specimens were tested to study the effects of steel fiber mixed with seven kinds of non-metallic fibers on the tensile properties of ultra-high-performance concrete (UHPC). Through experiments and micromorphological analysis, the effects of hybrid fibers on the compressive strength, tensile strength, peak strain, fracture energy, and characteristic length of UHPC were analyzed. The results showed that the hybrid fiber-reinforced UHPC showed good ductile failure characteristics, which reflected the good crack resistance and toughening effect of different fibers. The tensile stress–strain curves of UHPC with different hybrid fibers can be divided into two parts: ascending section and softening section, and the softening section was greatly affected by the type and content of fibers. Basalt fiber with a diameter of 0.02 mm had the most obvious strengthening effect on UHPC, and polyvinyl alcohol fiber with a diameter of 0.2 mm and length of 8 mm had the best toughening effect. The mixing of steel fiber and non-metallic fiber cannot only reduce the preparation cost but also improve the fracture energy and toughness of UHPC.

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Workability, strength and flexural toughness properties of hybrid steel fiber reinforced SCC with high-volume fiber

Cited by 72 publications

References 26 publications

Effect of fiber hybridization on mechanical properties of concrete

Effect of fiber hybridization on mechanical properties of concrete

Investigation of Workability and Engineering Properties of Hybrid Fiber Reinforced SCC Mixtures

Tensile Behavior of Hybrid Fiber-Reinforced Ultra-High-Performance Concrete

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