ISSN:
0263-080X
Source:
Emerald Fulltext Archive Database 1994-2005
Topics:
Architecture, Civil Engineering, Surveying
Notes:
Purpose - Seeks to examine the bond strength of a large range of structural polypropylene fibres, as used in concrete, to determine the most effective fibre capable of transmitting load (N/mm2) between fibre and cement within the concrete matrix. Design/methodology/approach - Following fibre selection characterised by the highest bond strength, determined from a series of pull out tests, BS flexural tests were carried out using high bond strength fibres (40?mm?×?0.9?mm diameter used at 6?kg/m3) to determine whether or not structural polypropylene fibres had any effect on the ultimate flexural strength of fibre-reinforced concrete, when compared with the plain control sample. Fibre orientation, type of rupture failure mode and post-crack performance were examined. Findings - Even structural fibre dispersion was found to be best achieved with the use of monofilament polypropylene fibres (19?mm?×?22 micron used at 0.9?×?kg/m3) in addition to the 6?kg/m3 structural fibre dose. Structural polypropylene fibres were found not to provide additional flexural strength however, they did provide post-crack control, limiting the crack width with subsequent enhanced durability that in turn will provide lower life cycle costs. Practical implications - In addition to increased durability the use of fibre reinforcement negates the need to place steel reinforcement bars. Originality/value - Investigates the ambiguity in literature between claims made by different investigators regarding the effects of polypropylene fibres on compressive and flexural strengths.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1108/02630800510610143
