EXPERIMENTAL STUDY ON FLEXURAL BEHAVIOUR OF R.C BEAMS RETROFITING WITH KEVLAR FIBER SHEET AND FIBER GLASS MESH
Now the day Many Existing structures required after some year after construction of projects. Some repairing the workrequiredbecausesomefactoraffectingtheaslikerebarcorrosion,failureofbondingbetweenbeam column,and toaspectssuddenloadinglikeimpact,fatigue,earthquake,etc. So,thistypeconditionstherearetwooptionsareavailableforthistypeconditionfirstoneisreplacementofpartsand secondisretrofitting. AReplacementofpartsisverycostlyandlonglasting prosesforrepairingworkandalsocoastthishighforthiswork canbedoing. NowsecondoptionsarebaterthisoneisRetrofitingthestructureareeasilyworkcompletedandcheapcostingforthe doingthework. TheRetrofitingworkistheeasilycompleteinshorttime.
Mehulkumar I Parmar1 , Abbas jamai2 ***
Keywords: RetrofittingofBeam,FlexuralStrength,KevlarFibberSheet,Glassfibremesh,wrappingpatternEtc.
We are uses Ordinary Portland cement of 53 grade by and compony Abuja cement was used. And add in concrete mixesusecorrespondingtoIS 8112.AndmaterialSpecificgravityofcementis3.15
International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 08 Issue: 12 | Dec 2021 www.irjet.net p-ISSN: 2395-0072 © 2021, IRJET | Impact Factor value: 7.529 | ISO 9001:2008 Certified Journal | Page1039
Fine Aggregate: Now we use the for Fine Aggregate for Locally River sand is used. We used proposition mix as per is:2386 9part9) 1963 The bulk specific gravity in dry condition and water absorption of fine aggregate are 2.65 and 1.70 % Respectively.
CementMaterials
Abstract: NowThepresentstudyintheprojectwiththeflexuralbehaviourofbeamshavingwecastingthetotal36beam tested.beamsizeof150x150x700mm.Willbecasted,whichwillconsistof6controlspecimengroupof3eachforconcrete grade of M 20 and M 25. 18 beams will be casted with M 20 grade of concrete and its retrofit by 5 patterns. Similar 18 beamsforM25gradeswillbecasted.And resultiscomparedwiththenormalspecimenforflexuralstrengthofthebeam. KevlarfibreretrofittingwithU wrappingpatternimprovedtheultimateloadcaringCapacityandflexuralstrengthofR.C beamssignificantlyhighthananotherwrappingpattern.
INTRODUCTION
MATERIAL PROPERTIES AND MIX PROPORTIONS
Coarse Aggregate: WeUsedAscoarseaggregateCrushedstoneofMaximumsize20mmMaximum used.WeusedMixPrepositionperis :23869part9) 1963andbulkspecificgravityindryconditionandwaterabsorptionofcoarseaggregateis2.85 Water WeusedNaturalwaterareusedtoin concretemixandforthecuring.
We are use other material as a fiberglass mesh. This material used for plastering, installation levelling floors, watering proofing,crackrepayingandplasteringinordertopreventcrackingorfrayingoftheplaster. This
Kevlar fiber The Kevlar fibre is a heat resistant, high tensile material and strong syndic fibre, Regarding the compare other materialsarmies’typesuch thatNomexand TechnoramaAreDevelopedbyStephanieWolakatDuPontin1965,The hightensilematerialisincomparetheothermaterial.Thismaterialfirsttimeusedin1970asreplacementforsteelin racing tires. This fibre in many uses in racing car Tiber, high cable, fire gloves, and clothes, high gloves bulletproof vests,thismaterialisveryhightensilecomparetosteelbecausethismaterialfive timetensilecapacityoffsteel.
Table 1: PropertiesofKevlarfibre Properties Unit Specification Density q/cm2 1.44 Thickness mm .3+ 0.03 Width Mm 1000+ 10% FabricAerialWeigh /m2 220+ 3% TensileStrengthfiber Gap 2.4 3.6 Tensile Strength Modulus Gap 60 120 WaveStyle Plain Glass fiber mesh
International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 08 Issue: 12 | Dec 2021 www.irjet.net p-ISSN: 2395-0072 © 2021, IRJET | Impact Factor value: 7.529 | ISO 9001:2008 Certified Journal | Page1040
materialisverylowcostandnotburneasily.verylowWightandhighstrength. Typical Properties of Glass fibre Mesh Width:1m, Meshsize2×2mm density60g/m2; Meshsize5×5mm density160g/m2: Reinforcementfiberglassexterior 160g/m2(5×5mm)isareliablereinforcementoftheplasterlayerontheouterwalls ofbuildings Mix Proportions Epoxy Resin Weusedasepoxyresinisbindingmaterialwithhightensileandhighviscosity,wecanbeusedforsurfacelayingand filingtothelargerepairing. Mix Design NoeinmixdesignWedesignthestandardgradeofconcreteM 20andM 25calculatedasperiscode10262 2009 For each components the as per follows IS guild lines content, we take W/C ratio were .55 and .50 Respectively were determined by trial Mixture respectively were determined by trial mixtures. The mix design is given in table 2 Showinbelowtable: 2 Table 2: As Mix Design below Proportions Material M 20 M 25 Cement 310kg/m3 320kg/m3 Water 170kg/m3 160Liter Fineaggregate 728kg/m3 744kg/m3 Coarseaggregate 1277kg/m3 1305kg/m3
International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 08 Issue: 12 | Dec 2021 www.irjet.net p-ISSN: 2395-0072 © 2021, IRJET | Impact Factor value: 7.529 | ISO 9001:2008 Certified Journal | Page1041 EXPERIMENTAL WORK Reinforcement Detail MainReinforcement: 4no 10mmDiameter Sherreinforcement: 8mmDiameter@100c/c Fig-1: ReinforcementDetail Casting of Beams ThreeIronmolds areusedforcastingthebeam.Andlayupoiledinside surfacetoduetoeasily removingofthebeam aftercasting fromthemolds MyBeamsMainsteelbar is2Nos.of Topandwerereinforcedwith2barsof10mmdiameterin Topand2hanger barsof 2Nos.10mm diameterin bottom.Atthemainbar typeclearcover8mmverticalstirrupsatequalspacing wereused.
International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 08 Issue: 12 | Dec 2021 www.irjet.net p-ISSN: 2395-0072 © 2021, IRJET | Impact Factor value: 7.529 | ISO 9001:2008 Certified Journal | Page1042 Test Setup of Beam : BeamaretestedunderUTMwithcapacityof2000KNarrangementisshowninFig. Sr. No Beam Notification Loads at initial Crack(KN) Ultimate Load (KN) 1 M 20 42.20 55.14 2 M 25 59.12 68.20 Retrofitting of Beam: WeapplythemethodisHandla upforstrengthenofbeam.Thesurfaceforbeamroughwithbrushingandcleaned.
International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 08 Issue: 12 | Dec 2021 www.irjet.net p-ISSN: 2395-0072 © 2021, IRJET | Impact Factor value: 7.529 | ISO 9001:2008 Certified Journal | Page1043 Atlayerofresinandharder(2:1)isappliedataSurfaceofthebeamapprox. 1mmwithbrush. Result: Table 5:StrengthincreasesofretrofittedforM 20M 25. Sr.No U Wrapping WrappingStrip Top WrappingBottom WrappingBottom In casting With Beam M 20 67.44 64.13 66.28 62.45 61.30 M 25 73.52 72.15 71.45 72.40 70.43 80706050403020100 U-Wrraping Strip Wrraping Top & WrrapingBotoom Bottom Wrraping in cast with Beam (KN)Load Diffrent Wrraping Pattern Retrofitted beam Result Compare with Normal Specimen M-20 Grade Normal Specimen Retrofitted Beam
7.IS456 2000 codeofpracticeisanIndianstandardcodeofplainandreinforcedconcrete.forgeneralstructuraluseof plainandreinforcedconcrete.
2.DheerajKumar,ShivaniBhardwaj“experimentalstudyonthehighstrengtharamidKevlarfiberreinforcedinconcrete beam and structural retrofitting of fiber RC beam using synthetic.” International Research Journal of Engineering and Technology(IRJET)Dec2018,Vol.05,Issue:12/DEC2018
CONCLUSIONS NowaftercheckthealltheresultareshowRetrofittingofallbeamspecimensaredifferentwrappingpattern. U Shapeis maximumcarryingcapacityarecomparetootherdifferentpatten
4. Y.M kantar , A.P Kulkarni, and K.S Wangikar “ investigation of flextural properties of glass Kevlar hybrid composite” EJERS,EuropeanJournalofEngineeringResearchandScienceVol.1,No.1,July2016.
International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 08 Issue: 12 | Dec 2021 www.irjet.net p-ISSN: 2395-0072 © 2021, IRJET | Impact Factor value: 7.529 | ISO 9001:2008 Certified Journal | Page1044
TheU ShapepatternismaximumLoadcarryingtheotherdifferentpattern,fromthebothgradeofconcrete(M 20andM The25) results indicate that after Retrofiting possess ultimate load carrying capacity of beam for sample increases of after retrofittingcomparedtonormalsamplebeamapproximately25%strengthimprovedforbothgradeofconcreteM 20and M 25. References 1. Thing jam Jackson Singha*, “Soutane Saman tab “Characterization of Kevlar Fiber and Its Composites: A Review” CompositesScienceandTechnologyinCivilEngineering,Elsevier,2015(ELSEVIER 2015)/1381 1387
KN)(LOAD
9080706050403020100
5.JournalofCompositesforConstruction@TheAmericanSocietyofCivilEngineers(ASCE)Year 2017
8.IS10262:2009,ConcreteMixproportioning U-Wrraping Strip Wrraping Top&WrrpingBotoom Bottom Wrraping in cast with Beam
Retrofitted
6.JournalofAdvancedstructuralJuly 2018(SPRINGER)
Diffrent Wrraping Pattern beam Result Compare with Normal Specimen M 25 Grade Normal Specimen Wrraping beam
3. Ahmad Abdel Hamid, Hany Eltife. “Retrofitting of reinforced concrete beams using advanced composite overlays.” The AmericanUniversityinCairo,Cairo,Egypt