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Author(s): Surendra Shah
Paper category: Proceedings
Book title: Proceedings of the 2nd International Conference on UHPC Materials and Structures (UHPC2018-China)
Editor(s): Caijun Shi and Baochun Chen
ISBN: 978-2-35158-219-0
e-ISBN: 978-2-35158-220-6
Publisher: RILEM Publications SARL
Publication year: 2018
Pages: 27
Total Pages: 1
Language : English

Abstract: Ideally high performance fiber reinforced concrete should have enhanced modulus of
elasticity, higher elastic limit, sustained strain hardening response characterized by sequential
multiple cracking with controlled crack widths. Conventional fiber reinforced concrete
primarily alters the post peak response and can constrain macro cracks. Strain hardening
response can be obtained by controlling processing (extrusion, pultrusion, spraying chopped
fiber and cement slurry), volume, type and geometry of fibers (e.g. textile) and rheology of
matrix (self-consolidating concrete (SCC). Ultra high performance concrete (UHPC) is based
on many of these attributes. Use of nanofibers such as carbon nanotubes (CNT) and carbon
nanofibers (CNF) fundamentally alters the nano structure of calcium silicate hydrate (C-S-H)
gel. Reinforcing concrete with CNT can enhance modulus of elasticity, enhance toughness,
reduce autogenous shrinkage and delay corrosion of steel bar reinforcement. Modeling and
characterizing interfaces at multiscale is critical in development of high performance fiber.

Online publication : 2018
Publication type : full_text
Public price (Euros) : 0.00

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