Strain hardening fiber reinforced alkali-activated mortar – A feasibility study

Lee, Bang Yeon; Cho, Chang‐Geun; Lim, Hyun Jin; Song, Jin Ah; Yang, Keun Hyeok; Li, Victor C.

doi:10.1016/j.conbuildmat.2012.06.007

Cited by 131 publications

(45 citation statements)

References 23 publications

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“…AMS fibre-reinforced cementitious composites may represent a post-cracked ductile strain in direct tensile test, which could not be observed in fibre-free concrete (Batson et al 1972;Shah 1980). However the ductile capacity of AMS fibre-reinforced cementitious composites was reduced for ECC and SHCC mixes, imposing high ductile and strain-hardening characteristics in direct tensile post-cracked region as the maximum tensile strain was above 2.0% (Fischer and Li 2003;Lee et al 2012;Choi et al 2014;Cho et al 2012). AMS fibres in cementitious mixture were expected to be fracture before complete pullout as shown in Fig.…”

Section: Test and Discussion On Direct Tensile Characteristicsmentioning

confidence: 99%

“…Attempts to utilize fibre cementitious or concrete composites mixed with metallic or non-metallic fibres had been greatly made in fields of high rise building and infra structures in order to enhance additional requirements of high ductility, performance and durability (Narayanan and Darwish 1987;Ashour et al 1992;De Hanai and Holanda 2008;Fischer and Li 2003;Kim et al 2009;Lee et al 2012;Choi et al 2014). For fibre-reinforced cementitious composites, non-metallic fibres such as synthetic fibres were used to mainly develop high ductile characteristics after cracking, with no improvement of strength, known as engineered cementitious composites (ECC) or strain-hardening cementitious composites (SHCC) (Fischer and Li 2003;Lee et al 2012;Choi et al 2014;Cho et al 2012;Kim et al 2014).…”

Section: Introductionmentioning

confidence: 99%

“…For fibre-reinforced cementitious composites, non-metallic fibres such as synthetic fibres were used to mainly develop high ductile characteristics after cracking, with no improvement of strength, known as engineered cementitious composites (ECC) or strain-hardening cementitious composites (SHCC) (Fischer and Li 2003;Lee et al 2012;Choi et al 2014;Cho et al 2012;Kim et al 2014). On the other hand, steel fibres are often used to mix in concrete or cementitious composites to refine their brittle characteristics by enhancing tensile and shear strength (Narayanan and Darwish 1987;Ashour et al 1992;De Hanai and Holanda 2008;Ö zgür and Khaled 2009;Ö zcan et al 2009;Lim and Hong 2016;Lu et al 2016).…”

Section: Introductionmentioning

confidence: 99%

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Experiments on Tensile and Shear Characteristics of Amorphous Micro Steel (AMS) Fibre-Reinforced Cementitious Composites

jeongsu¹,

Cho

Moon

et al. 2017

Int J Concr Struct Mater

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Amorphous micro-steel (AMS) fibre made by cooling of liquid pig iron is flexible, light and durable to corrosion, then to be compatible with high flowable and disperable states of mixing as well as high ductile post-cracked performances to apply in fibre-reinforced cementitious composites. In the current research, AMS fibre-reinforced cementitious composites based on cement and alkali-activated ground granulated blast furnace slag mortars were newly manufactured and evaluated for the strength and ductile characteristics mainly by direct tensile and shear transfer tests in the variation in the volume of AMS fibres with two different lengths of 15.0 and 30.0 mm. As a result, it was found that 1.0-1.25% fibre volume fractions were recommendable for AMS fibre-reinforced cementitious composites to maximize direct tensile strength, ductile tensile strain, and shear strength of the composites. However, a further fraction of AMS fibre lowered these mechanical characteristics. Simultaneously, it could be said that AMS fibre-reinforced cementitious composites exhibited up to about 3.7 times higher in direct tensile strength and up to 2.3 times higher in shear strength, compared to AMS fibre-free specimens.

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Section: Test and Discussion On Direct Tensile Characteristicsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Experiments on Tensile and Shear Characteristics of Amorphous Micro Steel (AMS) Fibre-Reinforced Cementitious Composites

jeongsu¹,

Cho

Moon

et al. 2017

Int J Concr Struct Mater

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“…In particular, its tensile ductility is comparable to that of high-ductile fiber-reinforced composites (HDFRC). HDFRC usually show a high tensile ductility of over 2% [5][6][7][8][9][10]. On the other hand, the tensile ductility of UHPC is less than 1% [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Tensile Behavior and Cracking Pattern of an Ultra-High Performance Mortar Reinforced by Polyethylene Fiber

Choi

Jang

Kwon

et al. 2017

Advances in Materials Science and Engineering

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This paper presents an experimental study of the compressive strength, tensile behavior (including the tensile strength, tensile strain capacity, and toughness), and cracking patterns of an ultra-high performance mortar (UHPM) reinforced by polyethylene (PE) fiber as well as a discussion of the different tensile behaviors of the UHPM according to the types and contents of fibers used. The UHPM reinforced by microsteel fiber of 1.5 vol% and the UHPM reinforced by PE fibers with three different fiber contents were designed and prepared. A series of experiments was undertaken to assess the effect of PE fiber on the properties of the UHPM. The results found a lower strength level, higher tensile strain capacity and toughness, and a larger crack width in the PE fiber-reinforced UHPM compared to microsteel fiber-reinforced UHPM. It was also demonstrated that tensile strain capacity and toughness of 4.05% and 0.454 MPa m/m, respectively, can be attained when using the proposed polyethylene-fiber-reinforced UHPM.

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“…According to previous research on it (Rokugo et al 2007;Stang and Li 2004), UHPC exhibits less ductile behavior compared to high ductile fiber-reinforced normal strength grade cementitious composites when the same amount of fiber is incorporated. Typical UHPC contains 2 vol% of steel fibers, whereas high ductile fiber-reinforced normal strength grade cementitious composites presenting excellent tensile strain capacity of more than 2 % includes PVA (polyvinyl alcohol) or PE (polyethylene) fibers in general (Choi et al 2016a, b;Lee et al 2012;Li 2003Li , 2012. Recent research works reported that synthetic fibers could also be applied to UHPC instead of steel fibers.…”

Section: Introductionmentioning

confidence: 99%

Control of Tensile Behavior of Ultra-High Performance Concrete Through Artificial Flaws and Fiber Hybridization

Kang

Lee

Choi

et al. 2016

Int J Concr Struct Mater

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Ultra-high performance concrete (UHPC) is one of the most promising construction materials because it exhibits high performance, such as through high strength, high durability, and proper rheological properties. However, it has low tensile ductility compared with other normal strength grade high ductile fiber-reinforced cementitious composites. This paper presents an experimental study on the tensile behavior, including tensile ductility and crack patterns, of UHPC reinforced by hybrid steel and polyethylene fibers and incorporating plastic beads which have a very weak bond with a cementitious matrix. These beads behave as an artificial flaw under tensile loading. A series of experiments including density, compressive strength, and uniaxial tension tests were performed. Test results showed that the tensile behavior including tensile strain capacity and cracking pattern of UHPC investigated in this study can be controlled by fiber hybridization and artificial flaws.

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Strain hardening fiber reinforced alkali-activated mortar – A feasibility study

Cited by 131 publications

References 23 publications

Experiments on Tensile and Shear Characteristics of Amorphous Micro Steel (AMS) Fibre-Reinforced Cementitious Composites

Experiments on Tensile and Shear Characteristics of Amorphous Micro Steel (AMS) Fibre-Reinforced Cementitious Composites

Tensile Behavior and Cracking Pattern of an Ultra-High Performance Mortar Reinforced by Polyethylene Fiber

Control of Tensile Behavior of Ultra-High Performance Concrete Through Artificial Flaws and Fiber Hybridization

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