Eur. Phys. J. Appl. Phys.
Volume 53, Number 3, March 2011
|Number of page(s)||6|
|Section||Nanomaterials and Nanotechnologies|
|Published online||22 February 2011|
Fabrication and fracture toughness properties of carbon nanotube-reinforced cement composite
School of Civil Engineering, Qingdao Technological University, Qingdao, 266033, P.R. China
2 Shenzhen Graduate School, Harbin Institute of Technology, Shenzhen, 518055, P.R. China
3 School of Civil Engineering, Harbin Institute of Technology, Harbin, 150090, P.R. China
Corresponding author: email@example.com
Accepted: 7 December 2010
Published online: 22 February 2011
Multi-walled carbon nanotube (MWNT) reinforced cement composites (MWFRCs) were prepared with surfactant dispersion, ultrasonic treatment, and subsequently high-speed shear mixing processes. These MWFRCs were characterized in the fracture toughness property with single edge notch bend method. As found, the addition of nanotubes improves the stress-intensity factor (KIC), critical crack mouth opening displacement (δC) and flexural strength (σs) of the cured nanocomposite, significantly. The maximal enhancement arrives up to 56.4%, 119.4%, and 54.8%, compared to the baseline, respectively. These achievements are mainly attributed to the superior pulling-out effect of dispersed and tough MWNT fiber upon the notched cracks. Incorporation of acid-treated MWNT balances the σs, KIC, and δC values. Additional nanophase carbon black mixed into the above MWFRC further increases the corresponding fracture toughness, while additional short carbon fiber shows a negative effect.
© EDP Sciences, 2011
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