batch-3 1st review

EXPERIMENTAL INVESTIGATION ON HYBRID FIBER

REINFORCED CONCRETE

FIRST REVIEW

PROJECT MEMBERS

UNDER THE GUIDENCE OF

Mrs. S .VALLABHY, M.Tech

(Assistant professor)

SP.Palaniappan

P.Thiayagarajan

C.V.Sharath

D.Vinod panwar

111412103062

111412103101

111412103104

111412103111

INTRODUCTION

• Concrete with a single type of fiber may improve the

desired properties to a limited level.

• A composite is termed as hybrid, if two or more types

of fibers are rationally combined to produce a

composite that derives benefits from each of the

individual fibers exhibits a synergetic response.

NEED FOR THE STUDY

• There is considerable improvement in the post-

cracking behavior of concretes containing fibers.

• Although in the hybrid fiber-reinforced concrete

the ultimate tensile strengths do not increase

appreciably, the tensile strains at rupture do.

• Compared to plain concrete, hybrid fiber

reinforced concrete is much tougher and more

resistant to impact.

LITERATURE REVIEWHybrid fiber reinforced concrete fiber synergy in high strength matrices, Banthia and

Gupta (2004) Journal Materials and structures.

1. Hybrids based on the fibre constitutive response, in which one fibre is stronger and stiffer and

provides strength, while the other is more ductile and provides toughness at high strains.

2. Hybrids based on fibre dimensions, where one fibre is very small and provides micro crack

control at early stages of loading; the other fibre is larger, to provide a bridging mechanism across

macro cracks.

3.Hybrids Based on Fiber Function: One type of fiber is intended to improve the fresh and early

age properties such as ease of production and plastic shrinkage, while the second fiber leads to

improved mechanical properties. Some such hybrids are now commercially available where a low

(0.2%) dosage of polypropylene fiber is combined with a higher (-0.5%) dosage of steel fiber.

Experimental Investigation on Flexural Performance of Hybrid Fibre

Reinforced Concrete , S. Eswari (2015), International Research Journal of

Engineering and Technology

Eswari.S has investigated about the flexural performance of hybrid fibre

reinforced concrete.

The influence of fibre content on the strength and ductility performance of

hybrid fibre reinforced concrete specimens having different proportions of

steel (S) and polyester (P) fibres was investigated.

The prisms of 100 x 100 x 500 mm dimensions were tested to study the

above parameters. The specimens incorporated 1.0% fibre volume fraction

of steel and polyester fibres in different proportions.

The strength and ductility performance of hybrid fibre reinforced concrete

specimens was compared with that of plain concrete. The test results show

that a proportion of S60P40 hybrid fibres improve the performances

appreciably.

Experimental investigation on strength and durability properties of hybrid fiber

reinforced concrete , Brijbhushan.S and Maneeth.P.D (2015), International

Research Journal of Engineering and Technology

In this experimental work using of two different fibres they are crimped

steel fibre and polypropylene fibre with different mix proportion of hybrid

fibres to form the hybrid fibre reinforced concrete.

Initial cracks, shrinkage cracks can be resist by using of polypropylene

fiber and steel fiber is to increases the strength parameters.

The proportion of steel and polypropylene fibres are added by 50% each

with different hybridization ration i.e. 0%,0.5%, 1.0 %, 1.5% .

From the work results showed that as the percentage of fibres increases, the

strength of concrete increases. Hybrid ratio 1.5 % gives maximum results

in all the strength parameters compare to other different hybrid ratios.

Influence of Hybrid Fiber on Reinforced Concrete, Jaison Varghese, P.

Muthu Priya , et..al (2014), International Journal of Advanced

Structures and Geotechnical Engineering

In this paper volume fraction of fiber is adopted as 0.5%. Controland three hybrid fiber composites were cast using different fiberproportions of steel and polypropylene.

The maximum compressive strength reaches in the HFRCS0.75P0.25, i.e., 75% steel fibres and 25% polypropylene fibres.

The spilt tensile strength, flexural strength of fibre percentage withS0.75P0.25 shows slight increase in strength. Improved tensilestrength can be achieved by increasing the percentage of steel fibres.

It can be observed that, under axial loads, cracks occur inmicrostructure of concrete and fibres limit the formation and growthof cracks.

Development Of Hybrid Polypropylene-steel Fibre Reinforced Concrete,

C.X. Quian, P. Stroeven (2000), Cement and Concrete Research

In this paper Qian and Stroeven measured the compressive strength, split

tensile strength of different mixes incorporating various volume fractions of

steel and polypropylene fibers.

A common concrete matrix was used in all mixes, with a water cement

ratio of 0.40 and cement content of 400 kg/m3.

Results of this study indicate that due to their crack bridging capacity, even

low modulus fibers may increase the strength of the matrix.

However an excess of fibers leads to additional defects during the

production stage, because optimum packing stage of particles and fibers

can not be achieved. Thus strength may be reduced.

METHODOLOGY

MIX DESIGN

PRELIMINARY TESTING

LITERATURE REVIEW

NEED FOR STUDY

INTRODUCTION

CONCLUSION

COMPARATIVE STUDY WITH CONTROL MIX

TESTING OF SPECIMENS

CURING

CASTING

SPECIFIC GRAVITY OF FINE AGGREGATE

S.NO Description (g) Trial 1 Trail 2 Trail 3 Mean

1Weight of

pycnometer(W1)

680 680 680

2.64

2Weight of pycnometer

+ sand(W2)

875 879 886


+ sand + water(W3)

1678 1681 1685


+ water(W4)

1557 1557 1557

5 Specific gravity2.635 2.647 2.64

SPECIFIC GRAVITY OF COARSE AGGREGATE

S.NO Description (g) Trial 1 Trail 2 Trail 3 Mean

1Weight of

pycnometer(W1)

713 713 713

2.72


+ gravel(W2)

1086 1090 1097


+ gravel + water(W3)

1771 1776 1782


+ water(W4)

1537 1537 1537

5 Specific gravity2.68 2.73 2.76

Sieve Size Mass retained

(g)

Cumulative

mass retained

(g)

Cumulative %

of mass

retained

Cumulative %

of mass

passing

through

4.75 mm 0 0 0 100

2.36 mm 110 110 11 89

1.18 mm 200 310 31 69

600 microns 240 550 55 45

300 microns 250 800 80 20

150 microns 190 990 99 1

<150 microns 10 1000 100 0

FINENESS MODULUS OF FINE AGGREGATE

FINENESS MODULUS = 2.76

GRADING OF FINE AGGREGATE AS PER

I.S.383.1970

IS Sieve

Designation

Percentage passing for

ZONE I ZONE II ZONE III ZONE IV

10 mm 100 100 100 100

4.75 mm 90 – 100 90 – 100 90 – 100 95 – 100

2.36 mm 60 – 95 75 – 100 85 – 100 95 – 100

1.18 mm 30 – 70 55 – 90 75 – 100 90 – 100

600 microns 15 – 34 35 – 59 60 – 79 80 – 100

300 microns 5 – 20 8 – 30 12 – 40 15 – 50

150 microns 0 – 10 0 – 10 0 – 10 0 – 15

Fine aggregate is conformed to grading Zone II of Table 4 of I.S.383.1970

Water Absorption of Coarse Aggregate

Sl.no Description Trial

1 Weight of saturated surface dry sample (g) 1000

2 Weight of oven dry sample (g) 991

3 Water absorption 0.9%

W1 – W2

W1

Water absorption = X 100

= (1000-991/1000) x100

= 0.9 %

Water Absorption of Fine Aggregate

Sl.no Description Trial

1 Weight of saturated surface dry sample (g) 500

2 Weight of oven dry sample (g) 495

3 Water absorption 1%

W1 – W2

W1

Water absorption = X 100

= (500-495/500) x100

= 1 %

AGGREGATE IMPACT TEST

Sl.NoWeight of

sample (A) kg

Aggregate

Passed

Through

2.36mm Sieve

(B) kg

Weight

Retained in

Sieve (C) kg

Aggregate

Impact

Value(%)

Mean

(%)

1 0.44 0.053 0.387 8.3

8.782 0.473 0.056 0.417 8.44

3 0.49 0.051 0.439 9.61

PROPERTIES OF FIBERS

STEEL FIBER

SPECIFICATIONS VALUES

Length 30 mm

Diameter 0.6 mm

Aspect Ratio 50

Sp. Gravity 7.19

Type Hooked

POLYPROPYLENE FIBER

SPECIFICATIONS VALUES

Length 12 mm

Diameter 0.1 mm

Aspect Ratio 120

Sp. Gravity 0.9

Type Mono filament

PHOTOS

Week 1 2 3 4 5 6 7

Curing (10/02/2016 to 09/03/2016)

Literature collection (1/02/2016 to 04/02/2016)

Preliminary tests (04/02/2016 to 07/02/2016)

Mix design (07/02/2016 to 09/02/2016)

Casting (09/02/2016 and 10/02/2016)

Testing (09/03/2016)

Report preparation (10/02/2016 to10/03/2016)

WORK SCHEDULEWork completed

Work in Progress

Work yet to be started

THANK YOU

batch-3 1st review

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