FIBER REINFORCED CONCRETE

(FRC)

Created and presented by:Baquero, Victor

Brown, ChrisThielbar, Trenton

What is fiber reinforced concrete

A concrete consisting of, cement, water, fine and coarse aggregate, along with discontinuous fibers.

Types of fibers

Types of fibers include Steel Plastic

Polyester, Polypropylene, Polyethylene Glass Natural materials

Wood cellulose, Bamboo, Elephant grass

All are available is different shapes sizes and materials

Types of fibers

Steel Shapes

Steel fibers are adhered together before mixing and separate while mixing to ensure uniform distribution

Advantages of using fiber reinforced concrete versus plain

concrete

Improves toughness of concrete Flexural strength is improved by up to 30%

by decreasing the propagation of cracks Improves tensile strength More economical than steel reinforcement Less prone to corrosion Gives an alternative way to reinforce

concrete other then traditional steel rebar

PCC

FRC

Corrosion

Unlike rebar there is not galvanic cell created in the fibers

No anodic/cathodic reaction pH level of concert protects steel fibers

from corrosion

Applications

Applications include: Pipes Tilt-up Panels Shotcrete Slabs Counters tops Bath tubs Tiles

Properties

Durability Made with a high content of cement and

low water to cement ratio When properly compacted and cured,

concrete with steel fibers is very durable Workability

Affects workability Compensate by adding superplasticizers

Properties

Compressive behavior of steel FRC Keeps integrity after failure Strength slightly enhanced

Tensile behavior increase tensile strength

Has little effect on the modulus of elasticity, drying shrinkage, and creep

Production

Production is guided and controlled mainly by the American Concrete Institute, ASTM, and various building codes

Production involves 5 Steps1. Determine typical Uses and Specifying

FRC2. Materials3. Mixture Proportioning4. Batching, Mixing, Delivery and Sampling5. Placing and Finishing

Summary

Fiber reinforced concrete is one of the oldest methods for reinforcing concrete

The main purpose of fiber reinforcement is to increases its structural integrity and improve flexural behavior

There are many different types of fiber that can be used for concrete reinforcement.

Is an economical way to reinforced concrete compared to regular steel.

References

Mamlouk, Michael, and John Zaniewski. Materials for Civil and Construction Engineers. Second Edition. N.J.: Pearson Hall, 2006. 576. Print

Mehta, P.K., and P.J.M Monteiro. "Fibers in Concrete." University of Californa, Berkeley, 04,May,2006. Web. 1 Dec 2010. <http://www.ce.berkeley.edu/~paulmont/241/fibers.pdf

Nemati, Kamran. "Progress in Conctet Technology: Fiber Reinforced Conctete (FRC)." University of Wahington. University of Washington, Seattle, Wahington, USA. Spring 2010. Lecture.

SMiRT 19, . "WOKSHOP ON: Fiber Reinforced Concrete." ASMiRT, 17,August,2007. Web. 1 Dec 2010. <http://www.iasmirt.org/iasmirt-2/SMiRT19/SMiRT19_WH3_Tatnall.pdf>.