FIBER REINFORCED CONCRETE

(FRC)Created and presented by:

Baquero, VictorBrown, Chris

Thielbar, 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 grassAll 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>.