Fiber Reinforced Concrete

download report

Transcript Fiber Reinforced Concrete

FIBER REINFORCED CONCRETE
(FRC)
Created and presented by:
Baquero, Victor
Brown, 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
 Wood
materials
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 Steps
1.
2.
3.
4.
5.
Determine typical Uses and Specifying FRC
Materials
Mixture Proportioning
Batching, Mixing, Delivery and Sampling
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>.