The effect of concrete alkalinity on behavior of reinforcing polyester and polypropylene fibers with similar properties

Rostami, Rouhollah; Zarrebini, Mohammad; Mandegari, Mansoor; Sanginabadi, Khaled; Mostofinejad, Davood; Abtahi, Sayyed Mahdi

doi:10.1016/j.cemconcomp.2018.12.012

Cited by 48 publications

(26 citation statements)

References 29 publications

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“…Other scientists present an increase in flexural strength for polypropylene fiber-reinforced concrete ranging from about 10% [36,38,77] to 35% [71]. An increase in flexural strength can be observed with significant proportions of polypropylene fibers [34,77,78]. [36,38,77] to 35% [71].…”

Section: Flexural Strengthmentioning

confidence: 99%

“…[36,38,77] to 35% [71]. An increase in flexural strength can be observed with significant proportions of polypropylene fibers [34,77,78].…”

Section: Flexural Strengthmentioning

confidence: 99%

“…The mechanism of energy absorption and crack control of fiber in concrete was presented in [30][31][32]. By applying polypropylene fibers to the mix, higher tensile strength of the concrete is obtained [33][34][35][36][37]. The effect of polypropylene fibers on the compressive strength of concrete has been discussed in many works.…”

Section: Introductionmentioning

confidence: 99%

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Characteristics of Recycled Polypropylene Fibers as an Addition to Concrete Fabrication Based on Portland Cement

et al. 2020

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High-performance concrete has low tensile strength and brittle failure. In order to improve these properties of unreinforced concrete, the effects of adding recycled polypropylene fibers on the mechanical properties of concrete were investigated. The polypropylene fibers used were made from recycled plastic packaging for environmental reasons (long degradation time). The compressive, flexural and split tensile strengths after 1, 7, 14 and 28 days were tested. Moreover, the initial and final binding times were determined. This experimental work has included three different contents (0.5, 1.0 and 1.5 wt.% of cement) for two types of recycled polypropylene fibers. The addition of fibers improves the properties of concrete. The highest values of mechanical properties were obtained for concrete with 1.0% of polypropylene fibers for each type of fiber. The obtained effect of an increase in mechanical properties with the addition of recycled fibers compared to unreinforced concrete is unexpected and unparalleled for polypropylene fiber-reinforced concrete (69.7% and 39.4% increase in compressive strength for green polypropylene fiber (PPG) and white polypropylene fiber (PPW) respectively, 276.0% and 162.4% increase in flexural strength for PPG and PPW respectively, and 269.4% and 254.2% increase in split tensile strength for PPG and PPW respectively).

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Section: Flexural Strengthmentioning

confidence: 99%

“…[36,38,77] to 35% [71]. An increase in flexural strength can be observed with significant proportions of polypropylene fibers [34,77,78].…”

Section: Flexural Strengthmentioning

confidence: 99%

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Characteristics of Recycled Polypropylene Fibers as an Addition to Concrete Fabrication Based on Portland Cement

et al. 2020

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“…This indicates that the PPF has an advantage on improving the impermeability of the concrete when the PPF content is ≤0.9 kg/m 3 . This is due to the fact that on the one hand, in the alkaline environment of concrete, the adhesion between the PPF and the cement matrix was enhanced [27]. On the other hand, the PPF restricted the formation of microcracks caused by any shrinkage of the concrete, thereby reducing the transportation channels for water and chloride ions.…”

Section: Effect Of Ppf Content On the Permeability Of Machine-made Samentioning

confidence: 99%

“…In order to modify the properties of concrete, the polypropylene fiber (PPF) could be added [17][18][19][20][21][22][23][24][25][26][27][28], and the PPF was found to be very effective in improving the crack resistance compared to other methods. The addition of PPF was found to decrease the workability [17] and increase the compressive strength [29][30][31][32], crack resistance [33][34][35], and durability [31,[36][37][38][39][40][41] given that the PPF was within an optimum content.…”

Section: Introductionmentioning

confidence: 99%

Effects of Aggregate Micro Fines (AMF), Aluminum Sulfate and Polypropylene Fiber (PPF) on Properties of Machine-Made Sand Concrete

Wang

Wang³

2019

Applied Sciences

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With the depletion and increasing demand of river sand, machine-made sand could be used more and more in concrete. In order to improve the properties of machine-made sand concrete, the effects of the aggregate micro fines (AMF) content, aluminum sulfate, and polypropylene fibers (PPF) on the slump, compressive strength, water permeability, and the chloride permeability coefficients were investigated through a single factor test method, and related mechanisms were analyzed. The results show that the optimum contents of AMF, aluminum sulfate, and the polypropylene fiber are 10 wt%, 1 wt%, and 0.6 kg/m3, respectively. The optimum content of AMF improved the compactness of concrete. The addition of aluminum sulfate promoted the initial formation of ettringite, and thereby improved the compressive strength and the permeability resistance. The polypropylene fiber can modify the pore structure distribution of concrete and reduce the porosity, thereby improving the impermeability of the concrete. The compressive strength of the machine-made sand concrete could be increased by more than 20%, and the water/chloride permeability coefficients could be decreased by more than 45%.

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A Literature Review Identifying the Scope for Utilization of Waste Polyethylene Terephthalate Bottle Fibers in Concrete for Enhancing Structural Properties

Gayake

Desai

2022

Lecture Notes in Civil Engineering

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The effect of concrete alkalinity on behavior of reinforcing polyester and polypropylene fibers with similar properties

Cited by 48 publications

References 29 publications

Characteristics of Recycled Polypropylene Fibers as an Addition to Concrete Fabrication Based on Portland Cement

Characteristics of Recycled Polypropylene Fibers as an Addition to Concrete Fabrication Based on Portland Cement

Effects of Aggregate Micro Fines (AMF), Aluminum Sulfate and Polypropylene Fiber (PPF) on Properties of Machine-Made Sand Concrete

A Literature Review Identifying the Scope for Utilization of Waste Polyethylene Terephthalate Bottle Fibers in Concrete for Enhancing Structural Properties

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