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Half a century of progress leading to ultra-high performance fiber reinforced concrete: part 2-tensile stress-strain response



Title: Half a century of progress leading to ultra-high performance fiber reinforced concrete: part 2-tensile stress-strain response
Author(s): A.E. Naaman
Paper category : conference
Book title: 2nd International RILEM Conference on Strain Hardening Cementitious Composites (SHCC2-Rio)
Editor(s): R.D. Toledo Filho, F.A. Silva, E.A.B. Koenders and E.M.R. Fairbairn
ISBN: 978-2-35158-120-9
e-ISBN: 978-2-35158-121-6
Publisher: RILEM Publications SARL
Publication year: 2011
Pages: 27 - 36
Total Pages: 10
Nb references: 56
Language: English


Abstract: Ever since the first patent on fiber reinforced concrete, the dream of civil engineers has been to “mix fibers into concrete like sand or aggregate to achieve a moldable, strong, ductile and durable composite for construction applications with strength and ductility competitive with those of reinforced concrete or steel.” Tensile strain-hardening ultra-high performance fiber reinforced concretes (UHP-FRC) provide a step closer towards that dream. Following the onset of modern developments of fiber reinforced concrete in the early 1960’s, there has been a continuous search for its improved performance. One can thus follow such progress in milestones along four inter-related paths: one path for the cementitious matrix, another for the fiber, the third for the interface bond between fiber and matrix, and the forth for the composite itself. After identifying some key milestones for each path leading to the record setting mechanical properties of today’s UHP-FRCs, the tensile stress-strain response of typical fiber reinforced cement composites is taken as an example of property for review to illustrate progress since the 1960’s. Typical stress-strain curves are presented showing improvement over time, from strain-softening to strain-hardening, then to record breaking performance as we know it today. Over the last five decades, the post-cracking tensile strength and the corresponding strain capacity have increased about twenty five times and five times, respectively. Undoubtedly, these records will be exceeded in the future. This is the second part of a series of two papers. While the first part of the paper covers an overview of chronological development in research leadign to today’s UHP-FRC, this part addresses the tensile stress-strain response.


Online publication: 2012-01-25
Publication type : full_text
Public price (Euros): 0.00