Time dependent behaviour of fibre pull-out in self-compacting concrete. (March 2017)

• Record Type: Journal Article
• Authors: Abrishambaf, Amin; Barros, Joaquim A.O.; Cunha, Vitor M.C.F.; Frazão, Cristina
• Is Part Of: Cement & concrete composites. Volume 77(2017)
• Page Start: 14
• Page End: 28
• Publication Date: 2017-03
• Subjects: Time-dependent behaviour -- Long-term load -- Creep -- Fibre pull-out -- Bond -- Steel fibre reinforced self-compacting concrete; Composite-reinforced concrete -- Periodicals; Concrete -- Periodicals; Composite materials -- Periodicals; Composites de ciment -- Périodiques; Béton -- Périodiques; Composites -- Périodiques; Béton léger -- Périodiques; Cement composites; Composite materials; Composite-reinforced concrete; Concrete; Lightweight concrete; Periodicals; Electronic journals; 620.135
• DOI: 10.1016/j.cemconcomp.2016.12.004
• Languages: English
• ISSNs: 0958-9465

Abstract

Abstract: In the present study, the effectiveness of fibres in transferring stress across cracks under a sustained load was assessed. Single fibre pull-out creep tests were performed, in which fibre slip was monitored as a function of the time. The influence of the fibre orientation angle (0, 30 and 60°), as well as pre-imposed fibre slip levels, s pr, 0.3 and 0.5 mm on the creep response was investigated. Additionally, instantaneous fibre pull-out tests were carried out on undamaged-bond specimens in order to quantify the effects of the pull-out creep behaviour. The damage introduced by the pre-slip levels in the bond of the fibre/matrix interface influenced the long-term fibre pull-out behaviour and, consequently, accelerated the creep rate. However, the assembled pull-out creep behaviour did not differ considerably from the instantaneous pull-out behaviour for the adopted pre-imposed fibre slip levels.