Pullout behavior of polyvinyl alcohol fiber from cementitious matrix during plastic state

Author(s): J. Liu, C. Li, J. Liu, Z. Yang, G. Cui
Paper category: Conference
Book title: 8th RILEM International Symposium on Fiber Reinforced Concrete: challenges and opportunities (BEFIB 2012)
Editor(s): Joaquim A.O. Barros
Print ISBN: 978-2-35158-132-2
e-ISBN: 978-2-35158-133-9
Publisher: RILEM Publications SARL
Pages: 480 - 488
Total Pages: 8
Language: English

Abstract: 
Toughening and reinforcing effect of polyvinyl alcohol (PVA) fibers to cementitious materials during plastic stage depends on the fiber-matrix interfacial bonding properties. Equipment for testing pull out behaviour of PVA fibers from cementitious matrix during plastic state was developed to understand the reinforcement of PVA fibers. Difference between polypropylene (PP) and PVA fibers, effect of fiber embedded length and matrix properties on pullout behaviour of PVA fibers was studied. Results showed that, PVA fiber showed better bond properties with the matrix, and the debonding displacement of PP and PVA fiber was similar, about at the 0.5mm. The higher the matrix strength was, the greater the bonding strength between PVA fiber and matrix would be, in other words, interfacial bonding strength and fiber energy consumption increased. With the increase of fiber embedded length, frictional force and slip distance between fiber and matrix increased, while the ratio of pullout displacement to embedded length decreased, which indicated the increase of embedded length did not cause the expected effect to bond properties. All studies in this paper provide experimental data to understand the high performance PVA fiber and to further make full use of it.

Online publication: 2013
Publication Type: full_text
Public price (Euros): 0.00