fibrillated polypropylene fibers(draft3)

8/7/2019 Fibrillated Polypropylene Fibers(Draft3)

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Fibrillated Polypropylene Fibers

In Reinforced Concrete

DJOY Engineering Co.

Doumon KashkooliJoshua Plenert

Osvaldo Escalona

Ying Song

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Introduction

Polypropylene fibers is the synthetic fibers,which was used for concrete reinforcement

Fiber reinforced concrete (FRC) isconcrete containing fibrous material whichincreases its structural integrity

Figure 1. Fibrillated Polypropylene Fiber 2


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Application

Fibrillated Polypropylene Fiber (FPF) is widelyused in general concrete applications where atough, ductile, and corrosion-resistant concrete is

required.

FPF main objective is to controltemperature/shrinkage cracking while improving

basic durability properties.

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Application (contd)

FPF is applied but not limited to slabs-on-grade,overlays/toppings, curbs, slope paving,driveways, sidewalks, basement floors, garage

floors, architectural/colored concrete, precast,mortar, grout, water tanks, and sewagetreatment facilities.

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Benefits

Applying FPF additive to concrete mix gives:

Higher Tensile and Compressive Strength

Lower Shrinkage Effect and Higher Ductility

Higher Toughness and Flexural Strength

Saving of concrete itself due to a constantthickness

Higher Elasticity to bending traction Higher Elasticity of the concrete

A reduction in the risks of corrosion

A reduction in micro cracks 5


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Benefits (contd)Higher Tensile And Compressive Strength

Figure 2. Tensile StrengthFigure 3. Compressive Strength 6

Fiber Reinforced Concrete is proven to increase both tensileand compressive strength as their cylinders continue tosustain load and endure large deformations without shatteringinto pieces. [ACI 544.1R-96]


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Benefits (contd)Higher Toughness and Flexural Strength

The material properties of fiberreinforced concrete are somewhatvariable based on fiberconcentration and the form of the

fiber reinforcement with increasesof more than 100% having beenreported.

The increases in flexural strength

is particularly sensitive, not onlyto the fiber volume, but also to theaspect ratio of the fibers, withhigher aspect ratio which led to itsstrength increases.

Figure 4. Flexural Strength 7


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Benefits (contd)

Lower Shrinkage Effect and Higher DuctilityFiber reinforced concrete areintended to be used toenhance the splitting tensile,

first crack strength andflexural toughness, themultidirectional positioning offibers in concrete mixturesassists in relieving the stress

that is developed duringshrinkage which results inreduction of plastic anddrying shrinkage cracking.

Figure 5. FRC beam

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VIDEO

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Disadvantages

Fabrication

The process of incorporating

fiber into the cement matrix is

labor intensive and costlier than

the production of the plain

concreteFigure 6. Mixing Collated FPF with concrete

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Substitute

Wire meshReinforcement

Sensitive to environment

Steel corrodes

Cracks easily

Concrete spalling from the

surface

Collated Fibrillated Polypropylene Fiber (CFPF) is anexcellent substitute for wire mesh reinforcement in

concrete reinforcement

Figure 7. Wire mesh reinforcement

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CFPF Typical Dosage and Unit Cost

The typical dosage for CFPF is 1.5 pounds percubic yard or 0.9 kilograms per cubic meter to bemixed with concrete

The typical unit cost for CFPF additive in NorthernCalifornia region is approximately $2.00 per poundwith freight included

Applying CFPF additive to the concrete mixturehas negligible effect on the cost impact ofstructural concrete

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Manufacturers

The Fiber Depot Website: http://www.thefiberdepot.com/

Address: 335 Eakin Road, Harrisville PA 16038 Phone: 1.800.438.9006

Fax: 1.800.439.7003

NyCon Corporation Website: http://www.nycon.com/ Address: 300 Ben Fairless Drive, Fairless Hills PA 19030

Phone: 1.800.456.9266

Fax: 1.401.596.4242

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Any Questions?

Thank You

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fibrillated polypropylene fibers(draft3)

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