@article{(Open Science Index):https://publications.waset.org/pdf/10006005, title = {Effect of Hooked-End Steel Fibres Geometry on Pull-Out Behaviour of Ultra-High Performance Concrete}, author = {Sadoon Abdallah and Mizi Fan and Xiangming Zhou}, country = {}, institution = {}, abstract = {In this study, a comprehensive approach has been adopted to examine in detail the effect of various hook geometries on bond-slip characteristics. Extensive single fibre pull-out tests on ultra-high performance matrix with three different W/B ratios and embedded lengths have been carried out. Test results showed that the mechanical deformation of fibre hook is the main mechanism governing the pull-out behaviour. Furthermore, the quantitative analyses have been completed to compare the hook design contribution of 3D, 4D and 5D fibres to assess overall pull-out behaviour. It was also revealed that there is a strong relationship between the magnitude of hook contribution and W/B ratio (i.e. matrix strength). Reducing the W/B ratio from 0.20 to 0.11 greatly optimizes the interfacial transition zone (ITZ) and enables better mobilization, straightening of the hook and results in bond-slip-hardening behaviour. }, journal = {International Journal of Civil and Environmental Engineering}, volume = {10}, number = {12}, year = {2016}, pages = {1599 - 1604}, ee = {https://publications.waset.org/pdf/10006005}, url = {https://publications.waset.org/vol/120}, bibsource = {https://publications.waset.org/}, issn = {eISSN: 1307-6892}, publisher = {World Academy of Science, Engineering and Technology}, index = {Open Science Index 120, 2016}, }