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Tensile strength of nano-fibre reinforced concrete repair material



Title: Tensile strength of nano-fibre reinforced concrete repair material
Author(s): P. van Tonder, D. Kruger, M. Shihambi
Paper category : conference
Book title: 2nd International Symposium on Service Life Design for Infrastructures
Editor(s): K. van Breugel, Guang Ye, Yong Yuan
Print-ISBN: 978-2-35158-096-7
e-ISBN: 978-2-35158-097-4
Publisher: RILEM Publications SARL
Publication year: 2010
Pages: 765 - 771
Total Pages: 7
Nb references: 4
Language: English


Abstract: Nanofibres comprise of characteristics with the potential to improve the bond cohesion between the concrete substrate and the repair material, hence enhancing the durability of the patch repair. This study was conducted to establish if the addition of carbon nanotubes and graphite nanofibres could improve the bond cohesion between the concrete substrate and the patch repair material.
‘Dog-boned’ moulds, divided into two sections were used for the experiment. The first half served as the concrete substrate, whereas the second half was the patch repair material. The concrete substrate was left to cure for 7 days before the patch repair material was added.
Carbon nanotubes were added in 1%, 3%, 5%, 7%, 8% and 9% of cement volume quantities respectively. In addition, graphite nanofibres were added in 1%, 3%, 5%, 8.5%, 9.5% and 10.5% of cement volume quantities respectively. Cured specimens were prepared and the tensile strength of the specimen was investigated using the direct tensile test.
The results were collected, analyzed and discussed. Comparison between the control specimen and the specimen with nanofibres was done using various mathematical and statistical methods. Specimens with both carbon and graphite nanotubes were found to be successful in increasing the tensile strength, hence the bond cohesion in concrete. In addition, carbon nanotubes proved to be more effective.


Online publication: 2011-04-20
Publication type : full_text
Public price (Euros): 0.00