Characteristics of Ultra-High-Performance Fiber-Reinforced Concrete with admixtures -A Review

Characteristics of Ultra-High-Performance Fiber-Reinforced Concrete with admixtures -A Review

, K. Nirmalkumar

1PG scholar, Department of Civil Engineering, Kongu Engineering College, Perundurai, Erode, Tamil Nadu 638060, India

2 Professor, Department of Civil Engineering, Kongu Engineering College, Perundurai, Erode, Tamil Nadu 638060, India

PG scholar, Department of Civil Engineering, Kongu Engineering College, Perundurai, Erode, Tamil Nadu 638060, India

The study reviews the characteristics of ultra high performance fiber reinforced concrete with admixtures. The historical background and workability actions of steel fibres in plain and ultra high performance fiber reinforced concrete (UHPFRC) is investigated in this research. This research improves the strength and workability with help of admixture and steel fiber 1%,2% and 3%. As a result, the next sections offer extensive results from diverse studies on the effects of mineral admixtures and fibre on the behavior of fresh UHPC.

Key Words: Steel fiber, UHPFRC, mineral admixture, workability.

1. INTRODUCTION

Due to unanticipated societal demands, such as high rise buildings,long spanbridges,andhighearthquake resistant concrete constructions, among others, the properties of concrete have been upgraded. Concrete must perform admirablyintermsoffreshness,mechanical strength,and durabilitytosatisfythesedesires.Ultra high performance concrete (UHPC) and ultra high performance fiber reinforced concrete (UHP FRC)/ultra high performance hybridfiber reinforcedconcrete(UHP HFRC)arecurrently being developed to achieve the aforementioned specifications.[1]UHPC has a high compressive strength (more than 150 MPa), tensile strength (greater than 10 MPa), and strong tensile strain hardening and softening behaviour,aswellasalowpermeabilitythatallowsharmful compounds like water and chlorides to pass through. In addition,conventional concreteequipmentcan beused to cast structural parts made of self compacting UHP FRC [2].As a result, UHPC has improved resistance to harsh environmentalconditions,canwithstandlateralloading,and has a long service life. In order to depict the evolution of concretefromitsbeginningtothepresent,theauthorsused aninvertedtriangle,asshowninFigure1.Theintroduction of concrete in a society accelerated infrastructure

development,asindicatedbythelowertipoftheinverted triangle. The researchers were pushed to develop more resilientandlong lastingconcretebecauseofthelimitations of ordinary concrete. The developed concrete had a poor microstructureandhadlimitationsintermsofdurabilityat an early stage. Mineral admixtures (such as fly ash, slag, silica fume, and metakaolin) and chemical admixtures (plasticizers) were used in the concrete to help overcome theselimitationstosome extent.Table1lists examplesof the addition/replacement of several types of mineral admixturesaswellascementcontenttobuildtheUHPC.The useofsmallerparticlesizesinmineraladmixtureswasfound to promote the chemical reaction due to the increased surfacearea,withalowerwater to cementratiopromoting theformationofcalciumsilicatehydrate(C S H)gel,leading tothedevelopmentofhigh strengthconcrete.Concrete,on theotherhand,getsmorebrittleasitsstrengthincreases.

Figure1.Historyofdevelopmentofconcretefromordinary concretetoUHP HFRC[1]

REFERENCE TYPE OFADMIXTURE ADDITIONOF ADMIXTURE CEMENT CONTENTIN REFERENCE (Kg/m3)

[3] Nanosilica Additionby1%,2%, 3%,4%and5wt% ofcement

439.5

[4] Silicafume Additionby25wt% ofcement 788

[5] Nanosilica Additionby1%,2%, 3%,and4wt%of cement

[6] ClassFflyash Replacedby10%, 20%,30%and40% ofcement

[7] ClassFflyash Replacedby20%, 40%,60%and70% ofcement

[8] Ricehuskash Replacedby16.66%, 33.33%,50%, 66.66%,83.33and 100%withsilica fume

[9] Ricehuskash Replacedby16.66%, 33.33%,50%, 66.66%,83.33and 100%withsilica fume

950

657

produced using strict curing regimes (200°C autoclave curingor90°Cthermalcuring)thatresultinlowefficiency and significant energy consumption [17,18]. Ultra high performance concrete (UHPC) is a type of RPC that has a dense matrix microstructure[19],[20],[21],[22] high mechanicalstrength[23 25]andsuperiorworkability.UHPC is also acknowledged as a viable material due to its exceptionalfeatures[26 28].

2.WORKIBILITY OF CONCRETE:

935

920

800

The quality that defines the effort necessary to handle a freshly mixed quantity of concrete with minimal loss of homogeneity(uniformity)isknownasworkability[29].The early ageprocessesofputting,compacting,andcompleting areallincludedinthetermmanipulate[30].Theworkability of concrete is influenced by the addition of finer mineral admixtures and fibres to improve the properties/performance of the concrete. The viscosity of UHPCisgenerallyhigherthanthatofordinaryconcrete[31] The viscous flow of UHPC is due to the radically different designmixcomposition(tightpackingoffinecomponents) compared to standard concrete, the characteristics of the materials, and the exceptionally low water to binder ratio.Furthermore, the mechanical and durability characteristicsofUHPCaregovernedbyitsperformancein the fresh state [31]. As a result, the next sections offer extensive results from diverse studies on the effects of mineral admixtures and fibre on the behaviour of fresh UHPC[32,33]

2.1 Effects of the usage of mineral admixtures:

Steel fiber reinforced concrete, slurry infiltrated concrete (SIFCON),densesilicaparticle(DSP)concrete,andmacro defect free(MDF)concrete/pastewerealldevelopedinthe 1980stoimproveconcretequalities.Steelfibreconcreteand SIFCON were introduced in studies by Hoff [10]and Lankard[11]. Following that, numerous studies were conductedtoincreasethestrengthandfailurebehaviourof concrete and to transition it from high strength concrete (HSC) to high performance concrete (HPC) (HPC). The introduction of dense silica particle (DSP) concrete and macro defect free (MDF) concrete/paste [12,13] Compressive strengths of DSP and MDF paste/concrete range from 120 to 270 MPa and greater than 200 MPa, respectively. Furthermore, in the 1990s, a technological breakthrough was made with the creation of reactive powderconcrete(RPC),whichhasacompressivestrengthof more than 200 MPa.and perhaps up to 800 MPa, with 40 kJ/m2 fracture energy [13 15]. Ordinary Portland cement (OPC),silicafume(SF),veryfinegranulometryaggregates, sand with an average grain diameter of 250 m, crushed quartz(averagegraindiameterof10m),andmetallicfibre make up the RPC composition [16]. RPC is typically

Researchershavetriedavarietyofadditivestoimprovethe performanceofconcreteandproduceUHPC,includingnano silica(NS),RHA,ultra finepalmoilfuelash(UPOFA),SF,MK, andfibres,amongothers.InthegreenstageofUHPC,NSand RHAinconcreteabsorbasubstantialamountofwaterdueto theirhighersurfacearea.Asaresult,theamountoflubricant wateravailableisreduced.Asaresult,UHPC'sworkability (slump flow values) has decreased significantly [26,34] commentedonthepotentialofredmud(RM)forUHPCina recent study. A modified Andreasen & Andersen (MAA) modelisusedtocreatetheUHPCmixdesign.Atthetimeof replacement,thecementcontentwasreplacedwithRMthere arethreestages(20percent,40percent,and60percent). InthecontrolUHPCmix,amaximumslumpflowof260mm was achieved. The integration of RM, on the other hand, reduces workability by 49.23 percent, 57.69 percent, and 59.62percent,respectively,atRMmixlevelsof20percent, 40percent,and60percent.

Figure.2SilicafumeandFlyash

TheeffectsofaddingUPOFAontheworkabilityofultra high strengthconcrete(UHSC)havealsobeeninvestigatedinthe hunt for a suitable mineral admixture to increase the workabilityofUHPC.Ithasbeenreportedthatincorporating UPOFAintoUHPCincreasesitsusability.BecauseUPOFAhas alowerspecificgravity,theincreasedbinderpastevolume obtained at a higher replacement percentage improves concrete workability. Furthermore, because UPOFA has a largersurfacearea,increasingthereplacementpercentage raises the viscosity of the UHPC. [35]UPOFA covers aggregate particles and fills gaps between aggregate particles effect. The workability of fresh concrete is improvedwhenSFisusedinsteadofcement.Thiscouldbe becauseSFcontainsfinesphericalparticlesthatfunctionas lubricants.Whenmorethan20%ofthecementisreplaced by SF, however, the workability drops considerably [36]. Amanjean et al.[36] investigated the effects of mineral admixtureparticlemorphologies(SFandMK)onthefresh characteristicsofUHPC.Theauthorsfoundthattheregular, round shape of silica fume influences the slump more favourablythantheirregularkindandplateletformofMK. Inaddition,theviscosityoftheplasticdoesnotdramatically increaseduringthetest.Theelongated,angular,andplatelet typesofmetakaolinmightresultinagreaterviscosityvalue; also, the presence of fibres boosts the mix's structuration capability.[37]Kim et al.In comparison to the usual UHPC mix, binary states of industrial by products (GGBFS and REOS)boostflowby45.6percent,accordingtotheauthor. The synergistic effect was found to be more beneficial to improveworkability.

Asaresult,itcanbeinferredthattheworkabilityofUHPCis mostly determined by physical properties, SCM material addition/replacement %, mono or dual type SCM particle use.SCMsmodifytheflowbehaviourofUHPCbychanging theviscosityandyieldstressoffreshconcrete.SCMsthatare responsibleforlimitingworkabilitylimittheuseofUHPCto structuresthatrequireahigherworkabilityofthemix,such astunnelsandsuper high risebuildings[38]

2.2 Effects of the usage of fiber:

Oneormoretypesoffibre,aswellasmineraladmixtures, areaddedtothetraditionalconstituentsofconcreteduring the UHP FRC/UHP HFRC manufacturing process. The workabilityofUHP FRCandUHP HFRCisinfluencedbythe fibregeometry,surfacearea,volumepercentage,andform

[39 41]. In the fresh stage of UHPC, the addition of fibres reducestherelativedroopandincreasestheaircontent.The detrimental impacts of adding fibres to UHPC can be mitigatedbyloweringthecementcontentandusingproper particle packing. The addition of steel fibres reduces the workability of UHP-FRC by increasing the cohesive force between the paste and the fibres [41]. A better understanding of steel fibre cohesion and distribution.Knowledgeoftherheologicalcharacteristicsof UHPCisrequiredinthematrix.Theinfluenceofultra-highperformancemortarrheologyfeaturesonfibredistribution wasinvestigatedbyWangetal.[39].Whencomparedtothe viscosity of the fresh mix, the yield stress is the crucial rheologicalparameterforauniformdistributionoffibreand depth.In a mix withhighyieldstress and plasticviscosity, fibre dispersion becomes difficult, whereas too low yield stress and plastic viscosity might result in significant segregation during the casting process. As a result, the authorrecommendedayieldstressrangeof900 1000Pa, 700 900 Pa, and 400 800 Pa for UHPC mixtures with 1 percent, 2 percent, and 3 percent fibre volume fractions, respectively.

The workability of UHP-HFRC can be determined using a factordubbedthe'fibrefactor,'accordingtoKwonetal.[42]. Theequationf=Vflf/dfcanbeusedtocalculatethe'fibre factor,'whereVfisthevolumeoffibre,fisthefibrefactor,lf isthefibrelength,anddfisthefibrediameter.Straightfibres (S)andhookedfibres(H)eachgettheirownfvalue,whichis summedtogether.Table6showsthefibrefactorrangefor UHPCdevelopment.Withanupperlimitof'fibrefactor'in therangeof2 2.5,theresultsindicatethatasthefibrefactor grows,theslumpofUHP-FRCdecreases.References[43,44] made a similar observation. Micro-steel fibre at 2% by volume in UHPC is the best dosage for consistent fibre distribution,accordingtoMengandKhayat[45].Whenthe optimal small V-funnel flow time of suspended mortar is utilised,i.e.,462s,equaltotheoptimalplasticviscosity(53 3s), a uniform fibre dispersion is ensured. Furthermore, Ferrara et al. [46], Kang and Kim [47]discovered that the typeoffreshUHPCinsertioninthemould,ratherthanthe casting technique used, has a substantial impact on fibre distributionuniformity.FreshUHPCisplacedfromoneedge ofthemouldandlettoflowtotheotherendinalongitudinal direction, demonstrating a more advantageous fibre orientationforachievingthedesiredresulttheReferences [48,49]madeasimilarobservation.

3. CONCLUSIONS

ThispaperexhaustivelyreviewedtheworkabilityofUHPFRC withsteelfiber.Becauseofwritingreview,afewsignificant discoverieswereacquired,andtheaccompanyingendscould bedrawnfromtheaboveconversations.

The viscosity of the matrix is raised and a rapid loss of workabilityisobservedinUHPCduetothesmallerparticle sizeandhighersuperplasticizerconcentration,whichlimits

theuseofUHPCinpracticalapplications[50].Whenfibreis addedtothematrix,thislossofworkabilitybecomesscary. Due to the absence of high workability necessary for structuressuchastunnelsandsuper high risebuildings,a stiff mix of UHPC/UHP FRC and UHP HFRC restricts the usage of this material. More advanced rheology studies demonstratethattheviscosityyieldstress,ratherthanthe viscosityofUHPC,isabetterreflectionoffreshbehaviour.

REFERENCES

[1] Sharma R, Jang JG, Bansal PP. A comprehensive reviewoneffectsofmineraladmixturesandfibers on engineering properties of ultra high performance concrete. Journal of Building Engineering.2022;45:103314.

[2] Bruhwiler E, Denarie E, editors. Rehabilitation of concrete structures using ultra high performance fibre reinforced concrete. Proceedings of Second International Symposium on Ultra High Performance Concrete, University of Kassel, Germany;2008.

[3] YuR,SpieszP,BrouwersH.Effectofnano silicaon thehydrationandmicrostructuredevelopmentof Ultra High Performance Concrete (UHPC) with a low binder amount. Construction and Building Materials.2014;65:140 150.

[4] Prem PR, Bharatkumar B, Iyer NR. Mechanical properties of ultra high performance concrete. World academy of Science, Engineering and Technology.2012;68:1969 1978.

[5] Ghafari E, Costa H, Júlio E, et al. The effect of nanosilica addition on flowability, strength and transport properties of ultra high performance concrete.Materials&Design.2014;59:1 9.

[6] Bahedh MA, Jaafar MS. Ultra high performance concrete utilizing fly ash as cement replacement under autoclaving technique. Case Studies in ConstructionMaterials.2018;9:e00202.

[7] AhmedT,ElchalakaniM,KarrechA,etal.ECO UHPC withhigh volumeclass Fflyash:newinsightinto mechanical and durability properties. Journal of Materials in Civil Engineering. 2021;33(7):04021174.

[8] HuangH,GaoX,WangH,etal.Influenceofricehusk ash on strength and permeability of ultra high performance concrete. Construction and Building Materials.2017;149:621 628.

[9]

[10]

KangS H,HongS G,MoonJ.Theuseofricehuskash asreactivefillerinultra highperformanceconcrete. CementandConcreteResearch.2019;115:389 400.

HoffGC,editorUseofsteelfiberreinforcedconcrete inbridgedecksandpavements.Steelfiberconcrete seminar (June): Proceedings, ed. SP Shah and A. Skarendahl;1985.

[11]

[12]

Lankard DR. Slurry infiltrated fiber concrete (SIFCON):Propertiesandapplications.MRSOnline ProceedingsLibrary.1984;42(1):277 286.

Bache HH. Densified cement ultra fine particle basedmaterials.1981.

[13]

Birchall J, Howard A, Kendall K. Flexural strength and porosity of cements. Nature. 1981;289(5796):388 390.

[14] Cheyrezy M, Maret V, Frouin L. Microstructural analysisofRPC(reactivepowderconcrete).Cement andconcreteresearch.1995;25(7):1491 1500.

[15] RichardP,CheyrezyMH.Reactivepowderconcretes withhighductilityand200 800MPacompressive strength.SpecialPublication.1994;144:507 518.

[16]

[17]

Richard P, Cheyrezy M. Composition of reactive powderconcretes.Cementandconcreteresearch. 1995;25(7):1501 1511.

Feylessoufi A, Crespin M, Dion P, et al. Controlled rate thermal treatment of reactive powder concretes. Advanced cement based materials. 1997;6(1):21 27.

[18]

Yazıcı H. The effect of curing conditions on compressive strength of ultra high strength concrete with high volume mineral admixtures. Buildingandenvironment.2007;42(5):2083 2089.

[19]

[20]

Reda M, Shrive N, Gillott J. Microstructural investigation of innovative UHPC. Cement and ConcreteResearch.1999;29(3):323 329.

GraybealBA.Materialpropertycharacterizationof ultra high performance concrete. United States. Federal Highway Administration. Office of Infrastructure…;2006.

[21]

SorelliL,ConstantinidesG,UlmF J,etal.Thenano mechanical signature of ultra high performance concretebystatisticalnanoindentationtechniques. CementandConcreteResearch.2008;38(12):1447 1456.

[22] JustsJ,BajareD,KorjakinsA,etal.Microstructural investigations of ultra high performance concrete obtainedbypressureapplicationwithinthefirst24 hoursofhardening.RigasTehniskasUniversitates ZinatniskieRaksti.2013;14:50.

[23] Xiao R, Deng Z c, Shen C. Properties of ultra high performanceconcretecontainingsuperfinecement and without silica fume. Journal of Advanced ConcreteTechnology.2014;12(2):73 81.

[24] WuZ,ShiC,KhayatKH.Investigationofmechanical propertiesandshrinkageofultra highperformance concrete:Influenceofsteelfibercontentandshape. CompositesPartB:Engineering.2019;174:107021.

[25] VanTuanN, YeG, Van Breugel K, etal.Hydration and microstructure of ultra high performance concreteincorporatingricehuskash.Cementand ConcreteResearch.2011;41(11):1104 1111.

[26] VanTuanN,YeG,VanBreugelK,etal.Thestudyof using rice husk ash to produce ultra high performance concrete. Construction and Building Materials.2011;25(4):2030 2035.

[27] TayehBA,BakarBA,JohariMM,etal.Utilizationof ultra highperformancefibreconcrete(UHPFC)for rehabilitation a review. Procedia Engineering. 2013;54:525 538.

[28] SharmaR,BansalPP.BehaviorofRCexteriorbeam column joint retrofitted using UHP HFRC. ConstructionandBuildingMaterials.2019;195:376 389.

[29] Astm C. 125 Standard terminology relating to concreteandconcreteaggregates.AnnualBookof ASTMStandards.2003;4:23.

[30] LiZ.Advancedconcretetechnology.John Wiley& Sons;2011.

[31] SadrmomtaziA,TajasosiS,TahmouresiB.Effectof materialsproportiononrheologyandmechanical strength and microstructure of ultra high performance concrete (UHPC). Construction and BuildingMaterials.2018;187:1103 1112.

[32] Karthik D, Nirmalkumar K, Priyadharshini R. Characteristic assessment of self compacting concrete with supplementary cementitious materials. Construction and Building Materials. 2021;297:123845.

[33]

VelumaniM,NirmalKumarK.Effectofcopperslag onmechanicalanddurabilityaspectsfordifferent strength concretes. CEMENT WAPNO BETON. 2021;26(2):156 166.

[34] KorpaA,TrettinR,editors.Ultrahighperformance cement basedcompositeswithadvancedproperties containing nanoscale pozzolans. Ultra High PerformanceConcrete(UHPC):Proceedingsofthe Second International Symposium on Ultra High PerformanceConcrete,Kassel,Germany;2008.

[35]

Mohammed AN, Johari MAM, Zeyad AM, et al. Improving the engineering and fluid transport propertiesofultra highstrengthconcreteutilizing ultrafine palm oil fuel ash. Journal of Advanced ConcreteTechnology.2014;12(4):127 137.

[36]

Amanjean EN, Mouret M, Vidal T. Effect of design parameters on the properties of ultra high performancefibre reinforcedconcreteinthefresh state. Construction and Building Materials. 2019;224:1007 1017.

[37] Kim H, Koh T, Pyo S. Enhancing flowability and sustainability of ultra high performance concrete incorporatinghighreplacementlevelsofindustrial slags. Construction and Building Materials. 2016;123:153 160.

[38] HouD,WuD,WangX,etal.Sustainableuseofred mud in ultra high performance concrete (UHPC): Design and performance evaluation. Cement and ConcreteComposites.2021;115:103862.

[39] Wang R, Gao X, Huang H, et al. Influence of rheological properties of cement mortar on steel fiber distribution in UHPC. Construction and BuildingMaterials.2017;144:65 73.

[40] Grünewald S. Performance based design of self compactingfibrereinforcedconcrete.2004.

[41] Yu R, Tang P, Spiesz P, et al. A study of multiple effects of nano silica and hybrid fibres on the properties of Ultra High Performance Fibre ReinforcedConcrete(UHPFRC)incorporatingwaste bottom ash (WBA). Construction and Building Materials.2014;60:98 110.

[42] KwonS,NishiwakiT,KikutaT,etal.Developmentof ultra high performance hybrid fiber reinforced cement based composites. ACI Materials Journal. 2014;111(3):309.

[43] Marković I. High performance hybrid fibre concrete: development and utilisation. IOS Press; 2006.

[44] NaamanA,WilleK.Somecorrelationbetweenhigh packing density, ultra high performance, flow ability,andfiberreinforcementofaconcretematrix.

BAC2010 2ndIberCongrSelfCompact.2010.

[45] Meng W, Khayat KH. Improving flexural performanceofultra high performanceconcreteby rheologycontrolofsuspendingmortar.Composites

PartB:Engineering.2017;117:26 34.

[46] Ferrara L, Park Y D, Shah SP. Correlation among freshstatebehavior,fiberdispersion,andtoughness properties of SFRCs. Journal of Materials in Civil Engineering.2008;20(7):493 501.

[47] Kang S T, Kim J K. The relation between fiber orientation and tensile behavior in an Ultra High Performance Fiber Reinforced Cementitious Composites (UHPFRCC). Cement and Concrete Research.2011;41(10):1001 1014.

[48] Kang ST, Lee BY, Kim J K, et al. The effect of fibre distributioncharacteristicsontheflexuralstrength of steel fibre reinforced ultra high strength concrete. Construction and Building Materials. 2011;25(5):2450 2457.

[49] Abrishambaf A, Barros JA, Cunha VM. Relation between fibre distribution and post cracking behaviourinsteelfibrereinforcedself compacting concrete panels. Cement and Concrete Research. 2013;51:57 66.

[50] Nirmalkumar K, Sivakumar V. A study on the durability impact of concrete by using recycled wastewater.Journalofindustrialpollutioncontrol. 2008;24(1):1 8.