The role of flaw size and fiber distribution on tensile ductility of PVA-ECC

Tosun-Felekoğlu, Kamile; Felekoğlu, Burak; Ranade, Ravi; Lee, Bang Yeon; Li, Victor C.

doi:10.1016/j.compositesb.2013.08.089

Cited by 153 publications

(31 citation statements)

References 11 publications

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“…9) will be influenced to a certain extent by a weaker matrix caused by the addition of microencapsulated PCMs. This is consistent with an observed correlation between flaw size and first cracking strength in SHCC [34]. After the crack formation, it will be bridged and arrested by PVA fibres, which will prevent (macro)crack localization and cause formation of a new crack elsewhere in the sample.…”

Section: Mechanical Propertiessupporting

confidence: 72%

Development of ductile cementitious composites incorporating microencapsulated phase change materials

Šavija

Luković

Kotteman

et al. 2017

Int J Adv Eng Sci Appl Math

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In the past two decades, much research has been devoted to overcoming the inherent brittleness of cementitious materials. To that end, several solutions have been proposed, mainly utilizing fibres. One of the most promising classes of materials is strain hardening cementitious composite (SHCC). It utilizes PVA fibres, and it is relatively costly compared to regular concrete, so it is commonly used only in surface layers. In this paper, a multi-functional ductile cementitious composite based on SHCC has been developed. It uses microencapsulated phase change materials (PCMs), capable of reducing temperature fluctuations in the material due to their high heat of fusion. It is shown that, although addition of microencapsulated PCMs are detrimental to compressive strength, they have very little effect on the flexural strength and deflection capacity. In the future work, mixtures with higher PCM contents will be developed in order to exploit their heat storage capability better. This material has potential to reduce temperature effects on concrete surfaces, while at the same time being extremely ductile.

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Section: Mechanical Propertiessupporting

confidence: 72%

Development of ductile cementitious composites incorporating microencapsulated phase change materials

Šavija

Luković

Kotteman

et al. 2017

Int J Adv Eng Sci Appl Math

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“…PVA fibre is an essential component of ''Engineered cementitious composites (ECC)", which achieved the tensile strain as 500 times higher than the normal concrete. The contributions of PVA fibres in ECC are well explored [9][10][11]; however, structural investigation of FRC using both PVA fibres and coarse aggregates is only investigated by Holschemacher and Höer [9] who stated that PVA fibres in FRC offer similar advantages as offered by steel fibre reinforced concrete (SFRC). There is another fibre, basalt fibre, which has recently been explored in several types of research [12][13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Investigating the performance of PVA and basalt fibre reinforced beams subjected to flexural action

Shafiq

Ayub

2016

Composite Structures

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“…This not only effectively inhibits early cracks in the concrete, but also improves the strength, toughness, and durability of the concrete [20]. At present, the enhancing properties of PVA have been confirmed in the application of Engineered Cementitious Composite (ECC) concrete, which does not contain coarse aggregate [21][22][23]. However, due to the large content of PVA in concrete (2%) without coarse aggregate, the cost of concrete is so high that the application is still limited to the key parts of structures subjected to large forces in engineering.…”

Section: Introductionmentioning

confidence: 99%

An Experimental Study on Dynamic Mechanical Properties of Fiber-Reinforced Concrete under Different Strain Rates

Song

Zhao

et al. 2018

Applied Sciences

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Fiber-reinforced concrete (FRC) has a great advantage in earthquake-resistant structures, as compared with regular concrete. However, there are many difficulties in the construction and maintenance of concrete structures due to the high density and easy corrosion of the steel fiber in commonly used steel FRC. With the development of polymer material science, polyvinyl alcohol (PVA) fiber has been rapidly promoted for use in FRC because of its low density, high strength, and large elongation at break value. Dynamic uniaxial compression and splitting tensile experiments of FRC with PVA fiber were carried out with two matrix strengths (i.e., C30 and C40), which were blended with PVA fibers with a length of 12 mm in different volume contents (0, 0.2, 0.4, and 0.6%), at the age of 28 days, under different strain rates (i.e., 10−5, 10−4, 10−3, and 10−2 s−1). The results show that PVA has an obvious enhancing and toughening effect on concrete, which can improve its brittle properties and residual strength. With increasing strain rate, the compressive strength, split tensile strength, and elastic modulus increase to a certain extent, while the toughness index and the peak strain decrease to a certain degree. The post-peak deformation characteristic changes from a brittle failure of sudden caving to a ductile failure with dense cracking. The effect of PVA is different when enhancing the concrete with two different matrix strengths. The lower the matrix strength, the more obvious the enhancement effect of the fiber, showing characteristics of a higher compressive strength and low split tensile strength in FRC with low strength and a smoother post-peak stress–strain curve.

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The role of flaw size and fiber distribution on tensile ductility of PVA-ECC

Cited by 153 publications

References 11 publications

Development of ductile cementitious composites incorporating microencapsulated phase change materials

Development of ductile cementitious composites incorporating microencapsulated phase change materials

Investigating the performance of PVA and basalt fibre reinforced beams subjected to flexural action

An Experimental Study on Dynamic Mechanical Properties of Fiber-Reinforced Concrete under Different Strain Rates

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