Behavior of multi-walled carbon nanotubes on the porosity and microstructure of cement-based materials

Abstract The porosity and microstructure of a Portland cement–multi-walled carbon nanotube composite were investigated. Multi-walled carbon nanotubes (CNTs), up to 1 wt.% of cement, synthesized by infusion chemical vapor deposition, and Portland cement type I (PC) were used to produce pastes with a water to cement ratio of 0.5. Mercury intrusion porosimetry (MIP) and scanning electron microscopy (SEM) were used to characterize Portland cement–CNTs systems. MIP analysis of the results indicates that total porosity of the mixes with CNTs was found to decrease with increasing CNTs content. Moreover, an important effect of additional CNTs was a reduction in the number of mesopores, while SEM technique showed dispersion of CNTs between the hydration phases of Portland cement pastes.

[1]  M. Pavese,et al.  Improving macroscopic physical and mechanical properties of thick layers of aligned multiwall carbon nanotubes by annealing treatment , 2008 .

[2]  P. Ball.  The perfect nanotube , 1996, Nature.

[3]  A. Chaipanich,et al.  Microstructure and Characterizations of Portland-Carbon Nanotubes Pastes , 2008 .

[4]  M. Beazi-Katsioti,et al.  The assessment of porosity and pore size distribution of limestone Portland cement pastes , 2009 .

[5]  P. Balaguru,et al.  Nanotechnology and Concrete: Research Opportunities , 2008, SP-254: Nanotechnology of Concrete: Recent Developments and Future Perspectives.

[6]  R. L. Sharma,et al.  The influence of mineral additives on the strength and porosity of OPC mortar , 2000 .

[7]  Anne B. Abell,et al.  Mercury Intrusion Porosimetry and Image Analysis of Cement-Based Materials. , 1999, Journal of colloid and interface science.

[8]  Shu-ying Gu,et al.  Mineralization of surfactant functionalized multi-walled carbon nanotubes (MWNTs) to prepare hydroxyapatite/MWNTs nanohybrid , 2009 .

[9]  Giuseppe Andrea Ferro,et al.  Influence of carbon nanotubes structure on the mechanical behavior of cement composites , 2009 .

[10]  H. Atahan,et al.  Effects of water–cement ratio and curing time on the critical pore width of hardened cement paste , 2009 .

[11]  David Hui,et al.  The revolutionary creation of new advanced materials - Carbon nanotube composites , 2002 .

[12]  J. I. Álvarez,et al.  Blended pastes of cement and lime: Pore structure and capillary porosity , 2006 .

[13]  Mark J. Schulz,et al.  Characterization of carbon nanotube/nanofiber-reinforced polymer composites using an instrumented indentation technique , 2007 .

[14]  Xiaohua Zhao,et al.  Mechanical behavior and microstructure of cement composites incorporating surface-treated multi-walled carbon nanotubes , 2005 .

[15]  A. Chaipanich,et al.  Bioactivity and mechanical properties of White Portland cement paste with carbon nanotubes , 2010, 2010 3rd International Nanoelectronics Conference (INEC).

[16]  Somchai Thongtem,et al.  Electrical resistivity of bulk multi-walled carbon nanotubes synthesized by an infusion chemical vapor deposition method , 2007 .

[17]  Maria S. Konsta-Gdoutos,et al.  Multi-scale mechanical and fracture characteristics and early-age strain capacity of high performance carbon nanotube/cement nanocomposites , 2010 .

[18]  Ji Liang,et al.  Synthesis of zirconia nanoparticles on carbon nanotubes and their potential for enhancing the fracture toughness of alumina ceramics , 2008 .

[19]  Weizhen Chen,et al.  Tribological application of carbon nanotubes in a metal-based composite coating and composites , 2003 .

[20]  M. Maugey,et al.  Nanoscale surface of carbon nanotube fibers for medical applications: Structure and chemistry revealed by TOF-SIMS analysis , 2006 .

[21]  I. Marinos,et al.  Investigations about the influence of fine additives on the viscosity of cement paste for self-compacting concrete , 2010 .

[22]  F. Lea.  The chemistry of cement and concrete , 1970 .

[23]  C. Pederzolli,et al.  Modification of MWNTs obtained by thermal-CVD , 2007 .

[24]  F. Wei,et al.  A new structure for multi-walled carbon nanotubes reinforced alumina nanocomposite with high strength and toughness , 2008 .

[25]  A. Chaipanich,et al.  Compressive strength and microstructure of carbon nanotubes–fly ash cement composites , 2010 .

[26]  Vesa Penttala,et al.  Surface decoration of carbon nanotubes and mechanical properties of cement/carbon nanotube composites , 2008 .

[27]  A. Esawi,et al.  Fabrication and properties of dispersed carbon nanotube–aluminum composites , 2009 .