PSI - Issue 11

Felipe Alves Amancio et al. / Procedia Structural Integrity 11 (2018) 91–98

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W ected (LAU; cture is an im hen expose ges (ARIOZ ificant deteri bility (HAD ruction of the ent paste occ he effects of RTZ; SORE osed to high ediately afte ses of fire wh surface. The y loss of stabi he use of p peratures (C NITA,2013; fresh state (K he reduction er normal c perature incre e absence of eeds the tens °C to170 °C, crete and prev

ANSON, 20 portant aspec d to high tem , 2007; YAN oration, such DAD; SHAN bond betwe urs (GEORGA high temper NSEN, 2005) and rapidly r exposure to en the piece b consequences lity and integ olypropylene HEN; LIU, YERMAK et ARAHAN, A of spalling by onditions, fib ases and the PP fibers, the ile strength o forming a v ents the detac

06 KODUR, t of the constr peratures, as G et al., 200 as loss of s NIS, 2004; en the cemen LI; TSAKIR atures are ge . Spalling is increasing te rapid heating ecomes so w are limited, rity of structu fibers in th 2004; JANS al., 2017). Ho TIS, 2011, X polypropyle ers exist in free water ins vapor pressu f the concret apor pressure hment (OZA

2014). Theref uction projec in the case 9; KODUR, trength, mod XIAO; KÖN t paste and th IDIS, 2005). nerally visibl defined as t mperatures, s and may be eak after heat since the ext res (KODUR e concrete r SON; BOST wever, this a IONG and LI ne (PP) fibers a dispersed ide to the con re inside thes e, spalling oc dissipation n WA; MORIM

ore, the pred t (KODUR, 2 of fires, conc 2014). This ulus of elasti IG, 2004; H e aggregates e in the form he breaking uch as those accompanied ing that when ent of damag , 2014). educes and e RÖM, 2010 ddition affect EW, 2015). is explained manner in t crete turns in e vapor bubb curs. Howev etwork, whic OTO, 2014)

iction of adeq 014). rete undergo exposure, am city reductio USEM, 2006 and the gradu of surface c of layers of c found in fir by violent e cracks deve e is small, bu ven avoids ; BANGI; H s negatively t in Figure 1, b he concrete. to vapor, form les results in er, when the h effectively .

uate fire safe es significant ong other pr n and degrad ). In addition al deteriorati racks and the oncrete from es. This deta xplosions or h lop, the piece t extensive s spalling when ORIGUCHI, he workabilit y Ozawa and When a fire ing bubbles. tensile stress. fibers are pr dissipates the

ty measures physical-che oblems, can ation of con , cracks, sp on of the har effect of sp the surface chment may appen during s of concrete palling can l exposed at 2011; SID y of the conc Morimoto (2 occurs, con It is believed If the tensile esent, they m vapors insid

in the mical cause crete's alling, dened alling when occur later fall of ead to high ERIS; rete in 014). crete that, stress elt at e the

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opylene fiber on te with polyp at their use h s show that th , 2013; AKCA alyze the beh xposed at hig n velocity (U

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A; MORIMOTO r after expose the improvem d a negative ; MA et al., 2 oncrete with es, verifying

, 2014). d at high tem ent of mech effect on the r 015). addition of fi parameters su

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