Please use this identifier to cite or link to this item: https://hdl.handle.net/1822/39480

TitleDevelopment of ductile cementitiuos composites using carbon nanotubes
Author(s)Rana, Sohel
Parveen, Shama
Fangueiro, Raúl
Paiva, M. C.
Xavier, José
KeywordsCarbon Nanotubes
Issue date2015
Abstract(s)Concrete is the primary construction material for civil infrastructures and generally consists of cement, coarse aggregates, sand, admixtures and water. Cementitious materials are characterized by quasi-brittle behaviour and susceptible to cracking [1]. The cracking process within concrete begins with isolated nano-cracks, which then conjoin to form micro-cracks and in turn macro-cracks. Formation and growth of cracks lead to loss of mechanical performance with time and also make concrete accessible to water and other degrading agents such as CO2, chlorides, sulfates, etc. leading to strength loss and corrosion of steel rebars. To improve brittleness of concrete, reinforcements such as polymeric as well as glass and carbon fibers have been used and microfibers improved the mechanical properties significantly by delaying (but could not stop) the transformation of micro-cracks into macro forms [2]. This fact encouraged the use of nano-sized fillers in concrete to prevent the growth of nano-cracks transforming in to micro and macro forms. Nanoparticles like SiO2, Fe2O3, and TiO2 led to considerable improvement in mechanical performance and moreover, nano-TiO2 helped to remove organic pollutants from concrete surfaces [3].
TypeConference paper
URIhttps://hdl.handle.net/1822/39480
Publisher versionhttp://issuu.com/phantoms_foundation/docs/nanopt2015
Peer-Reviewedyes
AccessRestricted access (UMinho)
Appears in Collections:DET/2C2T - Comunicações em congressos internacionais com arbitragem científica

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