ADVANTAGES & BENEFITS OF SYNTHETIC FIBRES IN CONCRETE FLOORING & PLASTERING APPLICATIONS

                                                                                                                                Download ppt

• The idea of using fibers in concrete materials dates back to Roman and Egyptians period

• Romans included bits of horsehair in the construction of

• ROMAN COLISEUM which was built in 80 AD

• The Egyptians used straw in their bricks used for constructions

 INTRODUCTION TO SECONDARY REINFORCEMENT OF

CONSTRUCTION BY FIBRES

• Plastic shrinkage and plastic settlement cracks

• Less abrasion resistance and impact resistance of floors

• Weak construction joints

• Periodic maintenance of floors due to less durability

• Faster wearing of top floor surface

DRAW BACKS IN CONCRETE FLOORING WORKS

• Development of plastic shrinkage cracks in the initial stage of plastering

• High rebound loss of mortar

• High water and moisture absorption from external environment

• Less cohesive mix due to segregation

• Development of thermal and drying shrinkage cracks at the hardened surface

of plastering

• More maintenance of the walls required in terms of frequent waterproofing and painting of the buildings

• Ugly crack patches

DRAW BACKS IN PLASTERING WORKS

• Generation 1 - Vegetable Fibers - Straw, Jute and Cotton, Coconut Coir

• Generation 2 - Horse hair, Sheep’s Wool

• Generation 3 - Glass, Polyester, Nylon, Polypropylene and Steel

 DEVELOPMENT OF FIBER REINFORCEMENT

• Glass - Expensive, Causes itching, Hazardous

• Steel - Corrosion, Dead Weight, Expensive, Mixing Problem

• Nylon - Very Expensive

 COMPARISON WITH VARIOUS TYPES OF FIBERS

• Holds aggregates & does not allow separation of coarse aggregate due to

vibration /gravity

• Results move uniform concrete to concrete

• Fiber allows slow transfer of water to surface, resulting in reduction of cracks

WHAT FIBRE DOES?

• ACCEPTANCE CRITERIA FOR CONCRETE WITH SYNTHETIC FIBERS

• Synthetic fibers are added to concrete to reduce plastic shrinkage cracking of reinforced concrete and structural plain concrete and/or to reduce shrinkage and temperature cracking in structural plain concrete slabs on grade

• Consideration to be given to the volume, size and type of fibers used

• The fibers are regarded as an admixture and are used in addition to any structural reinforcement, shrinkage and temperature reinforcement and joints as required in the applicable code

• The fibers may be used in concrete over steel deck construction

• The fibers may be used in fire-resistive construction on steel decks

·        Fibers were instrumental in reducing shrinkage cracks

·        Rebound loss of the mortar has been reduced to 10 % instead of 30 to 40 % with out fibers in the mortar

·        There is no Dampness and leakage of plastered walls

·        Better finish of wall surface

·        Increased strength of mortar due to which more durable and long lasting constructions

·        Savings due to economic mix designs and more durable plastered surface

·        Compressive strength of plaster was increased by over 15-20%

·        Results in Cement savings up to 3%

·        Increase in labour productivity by over 5%

·        ADVANTAGES & BENEFITS OF USING FIBERS IN PLASTERING
AT OUR PROJECTS

·        The use of fibers has improved the abrasion resistance of concrete floors to
moving loads

·        No appearance of plastic shrinkage and plastic settlement cracks on the concrete floor surface

·        Service life of the floor is enhanced due to high durable concrete produced with synthetic fibers

·        Improved impact resistance of floors to point loads

·        Concrete mix with fibers was cohesive with better workability

·        Compressive strength of plaster was increased by over 8-10%

·        ADVATAGES & BENIFITS OF USING FIBERS IN CONCRETE FLOORING WORKS

·        Use of Synthetic Fibers in all construction applications should be encouraged by the construction industry

·        Different types of fibers should be developed to address each specific  need of construction applications

·        Construction industry should encourage new technologies like fibers reinforcement in construction to a larger extent for improving the durability and serviceability of the building and structures

·