Abstract
(PE)-UHPFRC, a novel strain hardening ultra high-performance fiber reinforced concrete (UHPFRC) with low clinker content, using Ultra-High Molecular Weight Polyethylene (UHMW-PE) fibers, was developed for structural applications of rehabilitation. A comprehensive life cycle assessment (LCA) was carried out to study the environmental impact of interventions on an existing bridge using PE-UHPFRC compared with conventional UHPFRC and post-tensioned reinforced concrete methods in three categories of global warming potential (GWP), cumulative energy demand (CED), and ecological scarcity (UBP). The results showed 55% and 29% decreases in the environmental impact of the PE-UHPFRC compared with reinforced concrete and conventional UHPFRC methods, respectively, which highlighted the effectiveness of this material for the rehabilitation/strengthening of structures from the viewpoint of environmental impact.
Highlights
Over the last few decades, the aging of transportation infrastructure systems has become an acute societal issue, and rehabilitation and strengthening of existing structures prevail over new construction
This newly developed material has the potential to strongly decrease the environmental impact of the ultra high-performance fiber reinforced concrete (UHPFRC) rehabilitation/strengthening method
The present study reports on the properties and advantages of a new strain hardening UHPFRC mix with synthetic PE fibers and reduced clinker content adapted for structural applications, in terms of the consequences on reducing environmental burdens
Summary
Over the last few decades, the aging of transportation infrastructure systems has become an acute societal issue, and rehabilitation and strengthening of existing structures prevail over new construction. ByReuhpatboil5i0ta%tio[1n3] amnedthcodnsideursainblgy reUdHuPceFtRhCe coanlrsetraudcytiondeticmreeasceomtphaered envtoirocnomnveennttailonimalpmacetthoofdsc.onHstorwucetvioenr, tshiteerse bisystuilpl ptote5n0t%ial [t1o3]imapnrdovceotnhsiisdemraebthlyodreedvuecnefuthrteher conasntdrumctiaoknetitmme ocoremspuasrteadintaobcleo,nfvoecnutsioinngalomn etthheodesn.vHirownmeveenrt,atlhceorestisofstcillinpkoetrenatniadl fitobrimoupsromviexes thius smedethtodacehvieenvfeuarthroebruasntdsmtraikne hitamrdoerneisnugstraeisnpaobnles,ef.ocCuosninsgidoenritnhge tehnevifraocntmtheanttaml cooresttohfacnlin9k5%er of andthfeibernovuisromnimxeesnutasel dimtopacth(ieGvWe aPraonbdusetmstbroadiniehdaredneenrginyg) roefscpuornresen.tCUoHnsPiFdRerCinigs tfhroemfatcht ethsatteeml ofirbeers thaann9d5%clinofkethreceonnvtriirbountmioennsta(l4i8m%panctd(G47W%P, arensdpemctibvoedlyiedfoernGerWgyP)) o[f14c,u1r5r]e,nrteUplHacPinFRgCthies fsrtoemel tfihbeers steweliftihbesyrsnathnedticclionnkeesr wcohnitleribalustoiornespl(a4c8i%ngacnldin4k7e%r ,wrietshpSeuctpivpelelymfeonrtGarWy PC)e[m14e,n15ti]t,ioreupslMaciantegrtihaless(tSeCelM), fibecarsnwsiigtnhifisycnanthtleytirceodnuecse wthheileenavlisronrmepelnatcainl gcocsltisnokferthwisitmhaStuerpipal.ementary Cementitious Materials (SCM), Pcaonlyseitghnyifliecnaent(lPyEr)e-dUuHcePFthReCenisvaironnemwelyntdael vceolsotspeodf tUhiHs mPFaRteCriaml.ix in which the steel fibers are repPloalcyeedthwyiltehneul(tPraE-)h-UigHh PmFoRleCcuislaar wneewiglhytdpeovlyeleothpyedlenUeH(UPFHRMCWm-PixE)inonwehs,icahndth5e0%steoefl tfhibeecrlsinakreer is reprleapcleadcewditwhiuthltrlaim-heigsthonmeofilelcleurlsar[1w6]e.igThhtephoilgyhettheynlseinle e(UlaHstMicWlim-PiEt )aboonvese, 7anMdP5a0,%thoef ttehnescileinskterernisgth repolfacmedorwe itthhalnim1e0sMtonPea,fiallnedrst[h1e6]t.eTnhsielehidgehfotermnsailteioenlacsatipcalcimityitoafbmovoere tMhaPna,3t.h5e%temnsaiklee sPtrEe-nUgHthPoFfRC mowreeltlhaadna1p0teMd Pfoar, satnrudctthueratlenapsiplelicdaetfiornms.aTtihoins cnaepwalcyitdyeovfemloporeedtmhaante3r.i5a%l hmasatkheePpEo-tUenHtiPaFl RtoCstwroenllgly adapted for structural applications. This newly developed material has the potential to strongly decrease the environmental impact of the UHPFRC rehabilitation/strengthening method. The environmental impact of three types of intervention on an existing bridge, including (1) demolition and reconstruction with post-tensioned reinforced concrete, (2) strengthening with steel fiber UHPFRC combined with rebar, and (3) strengthening with PE-UHPFRC combined with rebar are evaluated in three categories of GWP, cumulative energy demand (CED), and ecological scarcity (UBP)
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