Analysis of Action of Polypropylene Fiber on M-30 Concrete by Supplementing Cement with Fly ash and

IJIRST –International Journal for Innovative Research in Science & Technology| Volume 4 | Issue 3 | August 2017 ISSN (online): 2349-6010

Analysis of Action of Polypropylene Fiber on M30 Concrete by Supplementing Cement with Fly Ash and GGBS Poornima M Reddy PG Student Department of Construction Technology Visvesvaraya Technological University ,Centre for PG studies, Regional Office, Kalaburagi Karnataka, India

Dr. Shreenivas Reddy Shahapue Professor and Course Coordinator Department of Construction Technology Visvesvaraya Technological University ,Centre for PG studies, Regional Office, Kalaburagi Karnataka, India

Maneeth P D Professor Department of Construction Technology Visvesvaraya Technological University ,Centre for PG studies, Regional Office, Kalaburagi Karnataka, India

Brijbhushan S Professor Department of Construction Technology Visvesvaraya Technological University ,Centre for PG studies, Regional Office, Kalaburagi Karnataka, India

Abstract The paper deals with the effects of addition of various proportions of polypropylene fibers on the properties of concrete. Main objectives of this experimental investigation is to characterize the selected mechanical properties of PPFRC and to study the effect of volume fraction of (PPF). The present dissertation work is carried out with M30 grade concrete with w/c ratio of 0.363. Cement is replaced by 20% of fly ash and 10% of GGBS. Polypropylene fibers are added by 0%, 0.50%, 1.00%, 1.50% & 2.00% of volume fraction. For all mixes compressive, split tensile, flexural tests are carried out and they are compared with conventional concrete.

Keywords: Polypropylene fiber, fly ash, ground granulated blast slag, compressive strength, split tensile strength, flexural strength _______________________________________________________________________________________________________ I.

INTRODUCTION

Concrete has become world’s most widely used construction material after water, because of its versatility, durability, sustainability and economy. As the Concrete is a brittle in nature that performs well in compression, but it is less effective in tension. To overcome this problem Reinforcement is used in concrete. Various types of fibers are used to reinforce concrete which enhances durability and strength. Polypropylene is one of the least expensive and generously accessible polymers. Polypropylene filaments are NonMagnetic, rust free, Alkali safe, sheltered and simple to utilize. Introduction of polypropylene fiber has become a good approach to meet the present demand of construction industry as these fibers are chemically inert and have hydrophobic surface, use of such material proves to be beneficial.

II. EXPERIMENTAL PROGRAM Materials Cement: Cement is the basic binding material used to bind the aggregates in the matrix of Concrete.The cement used was locally available 53 Grade.The cement has a specific gravity of 3.12 with initial and final setting times 45 and 360 minutes respectively. And has fineness 6%.

Flyash and GGBS: In this experimental program class F fly ash is used which has pozzolnic properties. In this review 20% of cement is supplanted with fly cinder which has specific gravity about 2.08.

GGBS is residue of steel and iron producing industry.10% of the cement is replaced by ggbs in the present experiment. Specific gravity is 2.9.

Aggregates: In the current investigations, easily procured crushed aggregates (basalts stone) of 20 and 10 mm down of 60% and 40% were used as coarse aggregates respectively. The specific gravity was 2.74.

Locally accessible great quality stream sand is utilized as fine aggregate. Zone-II Fine aggregate is utilized in this experimental work having specific gravity is 2.62.

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Analysis of Action of Polypropylene Fiber on M-30 Concrete by Supplementing Cement with Fly Ash and GGBS (IJIRST/ Volume 4 / Issue 3 / 017)

Super plasticizer: In modernized concretess practice role of super plasticizer is significant. To enrich the workability characteristics of concrete and to produce homogeneous concrete, Conplast SP-430 (200ml per 50kg) was used for the experimental work.

Use of Super plasticizer: Conplast-SP430 Specific gravity - 1.220 to 1.225 Polypropylene Fiber: Polypropylene monofilament fibers were used in concrete to enhance longevity and control the of minute cracks which appears during curing. In the present investigation work 12mm length and 34μm diameter fiber was used with low density of 0.90 KN/m3.

Water: Water used for concreting should be of good quality and it should be potable.

Mix Proportioning In this experimental work the Concrete mix of M-30 grade design has been carried out by replacing the cement with 20% of fly ash and 10% of GGBS. In this research the concrete samples were prepared with fiber ratios of 0, 0.5, 1.0, 1.5 and 2 % of volume fraction.

Mix proportion for M-30 grade concrete obtained is Mix ratio is 1:1.49:2.54:0.363.

Cement 313.77 kg/ m3

Flyash 89.65kg/ m3

GGBS 44.825kg/ m3

WATER 163kg/ m3

FINE AGGREGATES 668.05kg/ m3

COARSE AGGREGATE 1139.89kg/ m3

SUPER PLASTICIZER 7.7kg/ m3

Mixing and Casting The Mixing procedure is similar as that of the conventional concrete. Along with the coarse aggregate and fine aggregate, fibers have been added into the concrete. mixing is carried out mechanically.

After the mix design as per the requirement all the ingredients like cement, fly ash, GGBS, Fine Aggregates, Coarse Aggregates etc are weighed and blended in its dry state to get steady and homogeneous mix. From mix design, requisite amount of water and super plasticizer is utilized and mixed thoroughly to obtain uniform color homogeneous mix. Cubes , cylinders and prisms of standard size were casted. The measures of the cube moulds were 150 mm × 150 mm × 150 mm, cylindrical mould of 150mm diameter and 300mm hight and prisms of 150mm × 150 mm × 600 mm. For each proportion of fiber 12 number of cubes, 12 number of cylinders and 12 number of prisms were casted.

Curing After 24hours of casting the concrete get sets and it is de-moulded. All the specimens were kept for curing for required number of days i, e for 3 days, 7 days and 28 days then samples were tested.

III. RESULT AND DISCUSSIONS Compressive Strength Compressive-Strength determines the characteristics of concrete. For this as per IS 456-2000 cubes of size150X150X150 mm were casted. The compression testing machine comprises of 2000KN capacity is used. The tests were done on these examples following 3, 7 and 28 days of curing. Compressive strength can be calculated as load at which the specimen fails divided by area and it is measured in N/mm2.

Table – 1 Results of compressive strength test for 3days, 7days and 28days COMPRESSIVE STRENGTH IN N/mm2 Sl.No. % of polypropylene fiber 3 days 7 days 28 days 1 0 16.74 24.28 38.44 2 0.5 18.23 27.61 41.82 3 1.0 23.21 31.21 44.16 4 1.5 25.61 36.84 47.16 5 2.0 18.23 34.41 40.40

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Analysis of Action of Polypropylene Fiber on M-30 Concrete by Supplementing Cement with Fly Ash and GGBS (IJIRST/ Volume 4 / Issue 3 / 017)

Fig. 1: Graph shows the comparison of 3, 7 and 28 days of compressive strength

Split Tensile Strength Tensile - strength of the concrete is essential and basic properties. For designing concrete structural elements which are subjected to torsion, shrinkage, transverse shear and temperature-effect it is necessary to have the knowledge of tensile - strength value.

Specimens measuring 150mm diameter and 300mm height were casted to carry out the split tensile test. The casted samples were tried on the pressure testing machine having 2000KN limit. The tests were done on these examples following 3, 7 and 28 days of curing. The load at which specimen fails is recorded.

Table – 2 Results of split tensile strength test for 3days, 7days and 28days SPLIT TENSILE STRENGTH IN N/mm2 Sl.No. % of polypropylene fiber 3 days 7 days 28 days 1 0 1.50 2.33 3.42 2 0.5 1.61 2.55 3.76 3 1.0 1.73 2.87 3.96 4 1.5 2.05 3.23 4.26 5 2.0 1.66 2.51 3.59

Fig. 2: Graph shows the comparison of 3, 7 and 28 days of split tensile strength

Flexural Strength In this test concrete prisms were used to determine flexural strength. Prisms dimensions used was of 150 X 150 X 600 mm. The tests were conducted on these specimens after 3, 7 and 28 days of curing. Prisms were tested on UTM keeping load in direction of compaction. Two point loading arrangement was used in this test as per IS: 516-1959.

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Analysis of Action of Polypropylene Fiber on M-30 Concrete by Supplementing Cement with Fly Ash and GGBS (IJIRST/ Volume 4 / Issue 3 / 017)

Table - 3 Results of flexural strength test for 3days, 7days and 28days FLEXURAL STRENGTH IN N/mm2 Sl.No. % of polypropylene fiber 3 days 7 days 28 days 1 0 2.36 3.54 4.41 2 0.5 2.67 3.75 5.39 3 1.0 2.85 3.81 5.55 4 1.5 3.30 4.27 5.87 5 2.0 2.49 3.12 4.71

Fig. 3: Graph shows the comparison of 3,7 and 28 days of flexural strength

IV. CONCLUSION From this experimental investigation following conclusions are made  As there is an increase in percentage of polypropylene fiber in the concrete there is a reduction in the slump value.  When contrasted with strength of concrete without utilizing fiber, increment in the quality of concrete with fiber was watched.  Up to a specific rate of polypropylene fiber measurement into the concretemass there is an expansion in the strength of the concrete after that there is a reduction in the strength of the concrete is watched.  Optimum results are obtained for the 1.5percentage of polypropylene fiber addition.  Maximum Compressive strength of about 47.16N/mm2 is attained at 28days with 1.5percent addition of fiber for M-30 grade of concrete.  Most extreme split tensile strength of around 4.26N/mm2 is achieved at 28days with 1.5percent expansion of fiber for M-30 grade of concrete.  Maximum flexural strength of about 5.87 N/mm2 is attained at 28days with 1.5percent addition of fiber for M-30 grade of concrete.  After 28days of curing 22.68 % increase in compressive-strength of PPFRC is observed for 1.5 % PPF content, compatible with conventional concrete.  After 28days of curing 24.56 % increase in tensile-strength of PPFRC is observed for 1.5 % PPF content, compatible with conventional concrete.  After 28days of curing 33.11 % increase in flexure-strength of PPFRC is observed for 1.5 % PPF content, compatible with conventional concrete.

REFERENCES [1] [2] [3] [4]

Divya S Dharan1, Aswathy Lal2,” STUDY THE EFFECT OF POLYPROPYLENE FIBER IN CONCRETE” International Research Journal of Engineering and Technology (IRJET), Volume: 03 Issue: 06 | June-2016.

1MR. Mehul J. Patel, 2 MRS. S. M. KULKARNI, “Effect of Polypropylene Fibre on the High Strenth Concrete”, Journal of Information, Knowledge and Research in Civil Engineering. ISSN: 0975 – 6744| NOV 12 TO OCT 13 | Volume 2, Issue 2| Seyed Hamed Ahmadipourinaeim and Younes Saberi,”Study on the Effect of Polypropylene Fibers on Strength and Heat Resistance of Concrete” World Applied Sciences Journal 31 (5): 767-770, 2014.

Saman Khan et.al,” Mechanical properties of Polypropylene Fibre reinforced concrete for M 25 & M 30 mixes: A Comparative study”P International Journal of Scientific Engineering and Applied Science (IJSEAS) - Volume-1, Issue-6, September 2015 ISSN: 2395-3470.

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Analysis of Action of Polypropylene Fiber on M-30 Concrete by Supplementing Cement with Fly Ash and GGBS (IJIRST/ Volume 4 / Issue 3 / 017) Kolli. Ramuji, „Strength properties of Polypropylene fibre reinforced Concrete‟, International Journal of Innovative Research in Science, Engineering and Technology (ISO 3297: 2007 Certified Organization) Vol. 2, Issue 8, August 2013.

[6] Dr.T.Ch.Madhavi1, L.Swamy Raju2, Deepak Mathur,” Polypropylene Fiber Reinforced Concrete”, International Journal of Emerging Technology and Advanced Engineering (ISSN 2250-2459, ISO 9001:2008 Certified Journal, Volume 4, Special Issue 4, June 2014) [7] K.Murahari#, .Rama mohan Rao p.‟ “Effects of Polypropylene fibres on the strength properties of fly ash based concrete” International Journal of Engineering Science Invention ISSN (Online): 2319 – 6734, ISSN (Print): 2319 – 6726, Volume 2 Issue 5 ǁ May. 2013 ǁ PP.13-19 [8] Mohit Dwivedi et.al,Effect of Polypropylene Fibres on Flexural Strength of M30 Grade Concrete‟‟, IOSR Journal of Mechanical and Civil Engineering (IOSR-JMCE) e-ISSN: 2278-1684,p-ISSN: 2320-334X, Volume 11, Issue 4 Ver. II (Jul- Aug. 2014), PP 93- 97.

[9] IS 10262-2009 concrete mix Design.

[10] IS 456-2000 plain and Reinforced concrete code of practice.

[11] MS Shetty, “Concrete Technology” [5]

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