Influence of polypropylene fiber geometry on plastic shrinkage cracking in concrete

Banthia, Nemkumar; Gupta, Rishi

doi:10.1016/j.cemconres.2006.01.010

Cited by 454 publications

(206 citation statements)

References 3 publications

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“…One of the recognised benefits of adding synthetic fibres into the concrete mix is reduction of plastic shrinkage cracking [33] that develops whenever the boundaries of RC elements resist free shrinkage. As a consequence of the early hydration processes, water evaporation through the surface and the associated shrinking, cracks appear before concrete has hardened enough to resist the developing tensile stresses.…”

Section: Plastic Shrinkage Crackingmentioning

confidence: 99%

Mechanical properties of concrete reinforced with recycled HDPE plastic fibres

Pešić

Živanović

Garcia

et al. 2016

Construction and Building Materials

135

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This work investigates potential engineering benefits of the pioneering application of simply extruded recycled high-density polyethylene (HDPE) plastic fibres in structural concrete. Mechanical and serviceability properties of concrete are studied through the testing of seven series of specimens: one made of the plain concrete and, for each of the two fibre diameters Ø 1 = 0.25 mm and Ø 2 = 0.40 mm, three series with 0.40%, 0.75% and 1.25% volume fraction of fibres. While the compressive strength and the elastic modulus of concrete were unaffected, the tensile strength and flexural (rupture) modulus were marginally increased, between 3% and 14% in the presence of HDPE fibres. Fibres mainly contributed by providing the post-cracking flexural ductility and through improving serviceability properties of concrete such as the reduced plastic shrinkage cracking, drying shrinkage and water permeability. The durability of HDPE fibres was assessed by means of the scanning electron microscope (SEM) imaging that showed no signs of their chemical deterioration in concrete. All findings suggest that recycled HDPE fibres can be instrumental in creating a new value chain in construction industry while also positively contributing to its environmental performance.

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Section: Plastic Shrinkage Crackingmentioning

confidence: 99%

Mechanical properties of concrete reinforced with recycled HDPE plastic fibres

Pešić

Živanović

Garcia

et al. 2016

Construction and Building Materials

135

View full text Add to dashboard Cite

show abstract

“…Geopolymer concrete is well known to be brittle, several researches established by adding some fibers in geopolymer mixture is one of the solutions to improve mechanical properties and flexural strength. Bhantia and Gupta [2] found that added cellulose based fiber in the concrete mixture, can be used as repair concrete strengthening and reduced the crack width. In [3] added 0.2% kenaf fiber by volume friction, slightly improved the compressive strength as compared the bare lightweight concrete.…”

Section: Introductionmentioning

confidence: 99%

The Application of PVA Fiber to Improve the Mechanical Properties of Geopolymer Concrete

Manfaluthy

Ekaputri

2017

MATEC Web Conf.

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Abstract. This paper presents an experimental investigation on the improvement of geopolymer concrete properties through the use of polyvinyl alcohol (PVA) fibers mixed in the fresh concrete. For the purpose of obtaining the optimum mechanical properties, the volume fraction of PVA fibers was varied at 0% ; 0.3% ; 0.5% ; ad 0.8%. All mixtures were cast by mixing fly ash, alkali activator, and aggregates. The activator used in this study was a combination of sodium silicate (Na2SiO3) and sodium hydroxide (NaOH). The mechanical properties of geopolymer concrete were obtained from the results of compressive strength, splitting strength, uniaxial tensile strength, elastic modulus, and flexural strength. It is found that the variation of 0.8% PVA fibers resulted in the highest strength for overall test. The utilization of 0.8% PVA fibers also contributed to increasing the direct tensile up to 50%. However, it is noticed that the elastic modulus was more prone to decrease as the fiber content in the mixture increased.

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“…Polypropylene (PP) fibers are mainly used to improve the ductility, toughness and impact resistance of concrete. Although they are not expected to increase the concrete strength, however, the addition of PP fiber greatly decreases the workability of concrete [3], which restricts the quantity of PP fiber [4], [5].…”

Section: Introductionmentioning

confidence: 99%

The Importance of Superplastizer Dosage in the Mix Design of Lightweight Aggregate Concrete Reinforced With Plypropylene Fiber

Shafigh

Yahaghi

2016

MATEC Web Conf.

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Abstract. This paper reports the results of a study conducted to investigate the effect of superplasticizer (SP) dosage on the slump, density, compressive strength and splitting tensile strength under different curing conditions of a lightweight aggregate concrete reinforced with polypropylene (PP) fiber. The lightweight aggregate used in this study was oil palm shell, which is an agricultural solid waste, originating from the palm oil industry. The results indicated that an increase in superplasticizer increased the workability, however, all the mechanical properties declined significantly. The reduction in the 28-day compressive and splitting tensile strengths was about 14. This study showed that although additional SP can improve the workability of the concrete, it may have a negative effect on the other properties of concrete. Therefore, the SP dosage in concrete mixtures containing PP fiber should be limited to a certain amount.

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Influence of polypropylene fiber geometry on plastic shrinkage cracking in concrete

Cited by 454 publications

References 3 publications

Mechanical properties of concrete reinforced with recycled HDPE plastic fibres

Mechanical properties of concrete reinforced with recycled HDPE plastic fibres

The Application of PVA Fiber to Improve the Mechanical Properties of Geopolymer Concrete

The Importance of Superplastizer Dosage in the Mix Design of Lightweight Aggregate Concrete Reinforced With Plypropylene Fiber

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