PSI - Issue 11

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

97

7

Fe

lipe Alves Amanc

io et al. / Structu

ral Integrity Pro

cedia 00 (2018)

000–000

Fig. 6 - Inf

luence of fiber co

ntent on mass lo

ss.

Fig 7. I

nfluence of fiber

content on the v

ariation of UPV .

F poly A was surfa A the t

or the reduct propylene fib bout the spall no spalling o ce already oc t the tempera race with high

ion of concr ers does not h ing phenome ccurrence of curred. ture of 800 ° er content (2

ete ultrasonic ave a signific non, the addit the concrete C spalling oc .40 kg/m³), as

pulse veloc ant influence ion of polypr at any additio curred for all can be obser

ity, ANOVA on the reduct opylene fiber n content, wh concretes wi ved in Figure

demonstrate ion of the VP collaborated ereas this ch th addition of 8.

d that the a U, according to prevent it. U ipping at the fibers, being

ddition conte to Figure 7. p to 600 °C reference con less intensifi

nt of there crete ed in

Fig.

8. Spalling on the

specimens mad

e with the traces ex

T30, T30+1,2, T posed to the tem

30+1,8 and T30+ perature of 800 °

2,4, represented C.

from left to right

, respectively, af

ter be

4. C T temp since redu conc T mod fires

onclusion he phenomen erature of 60 all concrete ced. It is wort rete is subjec he results ob ulus of elastic . With this, t

on of spalli 0 °C. Above s with fibers p h noting that ted to high tem tained demon ity and comp he engineer

ng with the this tempera resented spa the residual s peratures. strate the im ressive streng can measure

addition of p ture, the add lling, howeve trength of the portance of r th of reinforc the damages

olypropylene ition only act r in concretes concrete is n egulatory sta ed concrete w caused by t

fibers was ed in the min with higher ot affected by ndards that p ith fibers, es he fire in the

prevented up imization of content of add the addition resent minim pecially after concrete str

to the exp this phenom ition this eff of fibers whe um values fo being subject uctures and,

osure enon, ect is n the r the ed to thus,