Critical parameters of nylon and other fibres for spalling protection of high strength concrete in fire |
| |
| Authors: | Young-Sun Heo Jay G Sanjayan Cheon-Goo Han Min-Cheol Han |
| |
| Affiliation: | (1) Department of Civil Engineering, Monash University, Clayton, VIC, 3800, Australia;(2) Engineering and Industrial Sciences, Swinburne University of Technology, PO Box 218, Hawthorn, VIC, 3122, Australia;(3) Division of Architectural Engineering, Cheongju University, Cheongju, Chungbuk, Republic of Korea; |
| |
| Abstract: | This study investigated various types of fibre length, fibre diameter, fibre type and fibre content on the degree of spalling
of concrete in fire. Four types of fibres, namely, polypropylene, polyvinyl alcohol, cellulose and nylon with various lengths
and diameters were studied. Fibre contents ranged from 0.05 to 0.15% by volume of concrete. Fire tests were conducted according
to the ISO 834 standard heating curve. Results showed that when comparing all the fibres under the same fibre content levels
(% volume of concrete), the nylon fibre was the most effective in protecting concrete from spalling. This is because the diameter
of the nylon fibres were significantly less than the other fibres, hence there were significantly more number of nylon fibres
present for the same fibre content (% volume) in concrete. Analysis revealed, regardless of the amount of fibre, the type
of fibre, diameter of and length of fibre, there is a strong relationship between the total number of fibres present per unit
volume, length of fibres and the degree of spalling observed. Based on this relationship, the authors established a critical
minimum for total number of fibres per unit volume for spalling protection in fire. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
