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A new strategy to reduce the environmental impact of FRC

Author(s): A.P. Fantilli, B. Chiaia
Paper category: Conference
Book title: 8th RILEM International Symposium on Fiber Reinforced Concrete: challenges and opportunities (BEFIB 2012)
Editor(s): Joaquim A.O. Barros
Print ISBN: 978-2-35158-132-2
e-ISBN: 978-2-35158-133-9
Publisher: RILEM Publications SARL
Pages: 243 - 253
Total Pages: 10
Language: English

Concrete cylinders are subjected to uniaxial compression tests in order to define the whole mechanical response of different mixtures, including the strength and the post-peak ductility. With respect to traditional concretes, the deleterious effects produced by the reduction of cement content (and thus of dioxide carbon emission) can be mitigated by adding mineral admixtures and/or fibers. For instance, fly ashes and silica fumes can increase the compressive strength, even in the presence of a high water/cement ratio. Similarly, low amounts of steel fibers (less than 1% in volume) can drastically enhance the post-peak toughness. Starting from these experimental observations, a new eco-mechanical index is here introduced with the aim of defining an effective strategy to reduce the environmental impact of concrete, without any mechanical detriment. The theoretical and the experimental analyses here developed seem to confirm that the idea of tailoring a new generation of fiber-reinforced concrete, capable of maintaining high mechanical properties with a reduced amount of cement, is not a chimera.

Online publication: 2013
Publication Type: full_text
Public price (Euros): 0.00

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