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Use of Recycled Short Fibers in Structural Concrete to
Enhance Mechanical Properties
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Sandaruwini A.H.W.E. (RU/E/2008/159)Bandara K.A.J.M. (RU/E/2008/014)
SupervisorDr. Sudhira De Silva
Introduction
Concrete is the most frequently used construction material in the world.
It has low tensile strength, low ductility, and low energy absorption
Mechanical properties of concrete can be enhanced by adding a small fraction of short fibers to the concrete
Fiber Reinforced Concrete
Applications of FRC
Objectives
Research Significance
Literature Review
Proposed Methodology
Testing Procedure
Activity Plan
Introduction
2
Fiber Reinforced Concrete
What is fiber reinforced concreteFiber reinforced concrete (FRC) is concrete containing
fibrous material which increases its structural integrity.
Different type of fibers Steel Fibers PP(polypropylene) Fiber and PET fibers Glass-Fibers Asbestos Fibers Carbon Fibers Coconut coir fibers Glass-fiber reinforced
concrete
PP fiber reinforced concrete.
Fiber Reinforced Concrete
Applications of FRC
Objectives
Research Significance
Literature Review
Proposed Methodology
Testing Procedure
Activity Plan
Introduction
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Applications of FRC
Thin sheets and irregular shapes Pavements Columns Bridge decks Airport construction as runways Taxiways Roof tiles Non pressure pipes Panels Curtain walls
Fiber Reinforced Concrete
Applications of FRC
Objectives
Research Significance
Literature Review
Proposed Methodology
Testing Procedure
Activity Plan
Introduction
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Objectives
To identify suitable materials to enhance the
mechanical properties of concrete.
To study the effect of fiber fraction and size on
mechanical behavior of fiber reinforced concrete.
To prepare specifications for future requirements.
Fiber Reinforced Concrete
Applications of FRC
Objectives
Research Significance
Literature Review
Proposed Methodology
Testing Procedure
Activity Plan
Introduction
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Research Significance
Environmentally friendly.
Waste utilization.
Effective usage of recyclable waste.
Cost effective.
Fiber Reinforced Concrete
Applications of FRC
Objectives
Research Significance
Literature Review
Proposed Methodology
Testing Procedure
Activity Plan
Introduction
Steel waste PET Bottle Waste6
Literature Review
Effect of Textile Waste on the Mechanical Properties of Polymer Concrete (Joao Marciano Laredo dos Reis, 2008, Brazil)
The mechanical behavior of polymer concrete reinforced with textile trimming waste was investigated.
Fibers at 0, 1 and 2% of the total weight was used.
Fiber Reinforced Concrete
Applications of FRC
Objectives
Research Significance
Literature Review
Proposed Methodology
Testing Procedure
Activity Plan
Introduction
Flexural strength test results Compressive strength test results
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Literature ReviewFiber
Reinforced Concrete
Applications of FRC
Objectives
Research Significance
Literature Review
Proposed Methodology
Testing Procedure
Activity Plan
Introduction
Utilization of Recycled Carpet Waste Fibers for Reinforcement of Concrete and Soil [Youjiang Wang, U.S.A., 2006] The fibers were obtained from shredded carpet backing.
The fiber length ranged from near zero (powder) to about 25 mm, and about
40% of the fibers were shorter than 5 mm.
The matrices included concrete with coarse aggregates, mortar with regular
river sand, and mortar with very fine silica sand. Portland cement was used with a water to cement ratio of 0.60 to 0.63.
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DosageKg/m3
Approx.(%) Slumpmm
Flexural Strength(MPa)
Compression Strength(MPa)
5.95 0.47 70 3.79 27.6
Fiber Reinforced Concrete
Applications of FRC
Objectives
Research Significance
Literature Review
Proposed Methodology
Testing Procedure
Activity Plan
Introduction
Literature Review
Effect of Fiber Content on Dynamic Properties of Coir Fiber Reinforced Concrete, University of Auckland, New Zealand, 2010
Fiber length : 7.5 cm
W/C ratio Compressive strength σ
Slump of CFRC Splitting tensile strength STS
Effect of fiber content on density of CFRC
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Fibers Concrete with Recycled Aggregate -Masonry and Concrete(VVytlacilova, Czech Technical University in Prague, Czech Republic, Singapore, 2010)
Fresh fiber concrete The preparation of slabs from fiber concrete
Fiber Reinforced Concrete
Applications of FRC
Objectives
Research Significance
Literature Review
Proposed Methodology
Testing Procedure
Activity Plan
Introduction
Literature Review
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Applicable are fibers with length 60-90 mm and width 1-2 mm.
Type of Fibers Volume of Fibers(%)
Compressive Strength(MPa)
Tensile Strength(MPa)
Fort Ferro 0.5 21.97 2.22
PET 1.5 28.67 3.07
Benesteel 1.0 26.96 2.62
Proposed Methodology
The diameter of coir fiber : 0.10 to .75mm The length of coir fiber : 25 to 200mm The diameter of steel fiber : 0.25 to 2.06mm The length of steel fiber : 6.4 to 76mm The size of PET fiber : 3.6 to 6.2mm squares
Fiber Reinforced Concrete
Applications of FRC
Objectives
Research Significance
Literature Review
Proposed Methodology
Testing Procedure
Activity Plan
Introduction
Coir Fibers
Steel Fibers
PET Bottle practical
Footwear waste11
Testing Procedure
Compressive strength(BS 1881: Part 121: 1993)
Tensile strength (BS 1881: 114)
150mm x 300mm concrete cylinder will be used for each mix design.
150 mm x 150 mm x 150 mm concrete cubes will be used for each mix design.
Fiber Reinforced Concrete
Applications of FRC
Objectives
Research Significance
Literature Review
Proposed Methodology
Testing Procedure
Activity Plan
Introduction
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Flexural strength (BS 1881: 5 1970)
Density test (BS 1881: 114) Water absorption test (BS 1881: 122)
Testing ProcedureFiber
Reinforced Concrete
Applications of FRC
Objectives
Research Significance
Literature Review
Proposed Methodology
Testing Procedure
Activity Plan
Introduction
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Activity PlanFiber
Reinforced Concrete
Applications of FRC
Objectives
Research Significance
Literature Review
Proposed Methodology
Testing Procedure
Activity Plan
Introduction
Task Days From To
Total Duration of the Project 274 2012/01/12 2012/10/11
Literature Review 48 2012/01/13 2012/02/29
Collection of Aggregate and other materials 61 2012/01/20 2012/03/20
Preparation of project Proposal 10 2012/02/24 2012/03/04
Planning of the Specimen Requirement 09 2012/02/29 2012/03/12
Prepare the Test Specimen 26 2012/03/05 2012/03/30
Experiment under Laboratory condition 195 2012/03/19 2012/09/21
Analysis of results 192 2011/03/22 2012/09/21
Preparation of the Final Report 30 2012/09/12 2012/10/11
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