Effect of graphene on mechanical properties of cement mortars

Functionalized graphene nano-sheets (FGN) of 0.01%−0.05% (mass fraction) were added to produce FGN-cement composites in the form of mortars. Flow properties, mechanical properties and microstructure of the cementitious material were then investigated. The results indicate that the addition of FGN decreases the fluidity slightly and improves mechanical properties of cement-based composites significantly. The highest strength is obtained with FGN content of 0.02% where the flexural strength and compressive strength at 28 days are 12.917 MPa and 52.42 MPa, respectively. Besides, scanning electron micrographs show that FGN can regulate formation of massive compact cross-linking structures and thermo gravimetric analysis indicates that FGN can accelerate the hydration reaction to increase the function of the composite effectively.

[1]  Lyu Shenghu.  Toughening effect and mechanism of graphene oxide nanosheets on cement matrix composites , 2014 .

[2]  Y. Blanter,et al.  Transport through normal-metal-graphene contacts , 2006, cond-mat/0612577.

[3]  Heli Jantunen,et al.  Inkjet printing of electrically conductive patterns of carbon nanotubes. , 2006, Small.

[4]  Xiangyun Song,et al.  Nano-carbon/sulfur composite cathode materials with carbon nanofiber as electrical conductor for advanced secondary lithium/sulfur cells , 2012 .

[5]  Robert J. Flatt,et al.  Design and Function of Novel Superplasticizers for More Durable High Performance Concrete (Superplast Project) , 2008 .

[6]  Bingqing Wei,et al.  Lead adsorption on carbon nanotubes , 2002 .

[7]  Chris Toumey,et al.  Reading Feynman Into Nanotechnology: A Text for a New Science , 2008 .

[8]  J. Kysar,et al.  Measurement of the Elastic Properties and Intrinsic Strength of Monolayer Graphene , 2008, Science.

[9]  Davide Zampini,et al.  Microfiber and Macrofiber Hybrid Fiber-Reinforced Concrete , 2005 .

[10]  Ta-Peng Chang,et al.  Effect of nanosilica on characterization of Portland cement composite , 2006 .

[11]  Peter H. Bischoff,et al.  Tension Stiffening and Cracking of Steel Fiber-Reinforced Concrete , 2003 .

[12]  Yujuan Ma,et al.  Effect of graphene oxide nanosheets of microstructure and mechanical properties of cement composites , 2013 .

[13]  Tsukasa Akasaka,et al.  Oxidation of multiwalled carbon nanotubes by nitric acid , 2005 .

[14]  Alexander H.-D. Cheng,et al.  Materials Genome for Graphene-Cement Nanocomposites , 2013 .

[15]  Nele De Belie,et al.  Acoustic emission analysis for the quantification of autonomous crack healing in concrete , 2012 .

[16]  Erica L. Corral,et al.  Toughening in graphene ceramic composites. , 2011, ACS nano.

[17]  J. Ou,et al.  Microstructure of cement mortar with nano-particles , 2004 .

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

[19]  Dale P. Bentz,et al.  Influence of silica fume on diffusivity in cement-based materials: II. Multi-scale modeling of concrete diffusivity , 2000 .

[20]  Shenghua Lv,et al.  Regulation of GO on cement hydration crystals and its toughening effect , 2013 .

[21]  Chloride diffusivity in flexural cracked Portland cement concrete and fly ash concrete beams , 2014 .

[22]  K. Drexler.  Nanotechnology: From Feynman to Funding , 2004 .

[23]  Andre K. Geim,et al.  The rise of graphene. , 2007, Nature materials.

[24]  Ali Nazari,et al.  Mechanical properties of cement mortar with Al 2O3 nanoparticles , 2010 .

[25]  Maria S. Konsta-Gdoutos,et al.  Carbon Nanofiber–Reinforced Cement-Based Materials , 2010 .

[26]  J. Dweck,et al.  Study by thermogravimetry of the evolution of ettringite phase during type II Portland cement hydration , 2002 .

[27]  Ma Yujua.  Effects of graphene oxide on microstructure of hardened cement paste and its properties , 2013 .

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

[29]  M. Mahmoud,et al.  Supported hydrophobic ionic liquid on nano-silica for adsorption of lead , 2011 .

[30]  Tao Chen,et al.  An electrically conducting polymer/graphene composite with a very low percolation threshold , 2010 .