REINFORCEMENT OF CARBON NANOTUBES ON CEMENT-BASED COMPOSITES

Author(s): Wang Baomin, Han Yu, Liu Shuai
Paper category: Proceedings
Book title: Proceedings of CONSEC13 Seventh International Conference on Concrete under Severe Conditions - Environment and Loading Volume I
Editor(s): Z.J. Li, W. Sun, C.W. Miao, K.Sakai, O.E. Gjørv, N.Banthia
ISBN: 978-2-35158-124-7
e-ISBN: 978-2-35158-134-6
Publisher: RILEM Publications SARL
Publication year: 2013
Pages: 234-242
Total Pages: 961
Language : English

Abstract: Multi-walled carbon nanotubes (MWCNTs) with addition of 0.08wt.% of cement were incorporated to cement paste with different water to cement ratio. The mechanical properties of the composites were investigated. Results show that the strength of the composites is significantly improved, the flexural strength of the composite with water to cement ratio of 0.35 increased by 40.4%. The pore structure and porosity of the composites were measured by mercury intrusion porosimetry (MIP), and the results indicate that the incorporation of MWCNTs could decrease the porosity and concentrate the pore size distribution of the composites. The microstructure test carried out by field emission scanning electron microscopy (FE SEM) shown that MWCNTs act as bridges and networks across cracks and voids, and the interface bond strength between the nanotubes and matrix is strong enough to guarantee the load transfer.

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