Characteristics of Nanosilica-Geopolymer Nanocomposites and Mixing Effect
This paper presents the effects of mixing procedures
on mechanical properties of flyash-based geopolymer matrices
containing nanosilica (NS) at 0.5%, 1.0%, 2.0%, and 3.0% by weight.
Comparison is made with conventional mechanical dry-mixing of NS
with flyash and wet-mixing of NS in alkaline solutions. Physical and
mechanical properties are investigated using X-Ray Diffraction
(XRD) and Scanning Electron Microscope (SEM). Results show that
generally the addition of NS particles enhanced the microstructure
and improved flexural and compressive strengths of geopolymer
nanocomposites. However, samples, prepared using dry-mixing
approach, demonstrate better physical and mechanical properties
comparing to wet-mixing samples.
[1] P. Duxson, A. Fernández-Jiménez, J.L. Provis, G.C. Lukey, A. Palomo,
J.S.J. Deventer, "Geopolymer technology: the current state of the art," J.
Mater. Sci., vol. 42, no. 9, pp. 2917-33, 2007.
[2] J. Davidovits, "Geopolymers - Inorganic polymeric new materials," J
Therm Anal, vol. 37, no. 8, pp. 1633-56, 1991.
[3] D. Pernica, P.N.B. Reis, J.A.M. Ferreira, P. Louda, "Effect of test
conditions on the bending strength of a geopolymer- reinforced
composite," J. Mater. Sci., vol. 45, no. 3, pp. 744-9, 2010.
[4] T. Phoo-ngernkham, Chindaprasirt P., Sata V., Hanjitsuwan S.,
Hatanaka S., "The effect of adding nano-SiO2 and nano-Al2O3 on
properties of high calcium fly ash geopolymer cured at ambient
temperature," Materials & Design, vol. 55, pp. 58-65, 2014.
[5] A. Nazari, J.G. Sanjayan, "Hybrid effects of alumina and silica
nanoparticles on water absorption of geopolymers: Application of
Taguchi approach," Measurement, vol. 60, pp. 240-6, 2015.
[6] M. Saafi, Andrew K., Tang P.L., McGhon D., Taylor S., Rahman M., et
al., "Multifunctional properties of carbon nanotube/fly ash geopolymeric
nanocomposites, "Constr. Build. Mater., vol. 49, pp. 46-55, 2013
[7] F. U. A. Shaikh, S. W. M. Supit, "Mechanical and durability properties
of high volume fly ash (HVFA) concrete containing calcium carbonate
(CaCO3) nanoparticles," Constr. Build. Mater., vol. 70, pp. 309-21,
2014.
[8] U. Rattanasak, P. Chindaprasirt, "Influence of NaOH solution on the
synthesis of fly ash geopolymer," Miner Eng, vol. 22, pp. 1073-8, 2009.
[9] N.C. Tanw, A.v. Riessen, "Determining the Reactivity of a Fly Ash for
Production of Geopolymer," J. Amer. Ceram. Soc., vol. 92, pp. 881-7,
2009.
[10] W. D. A. Rickard, R. Williams, J. Temuujin, A.v. Riessen, "Assessing
the suitability of three Australian fly ashes as an aluminosilicate source
for geopolymers in high temperature applications," Mater Sci Eng., vol.
528, no. 9, pp. 3390-7, 2011.
[1] P. Duxson, A. Fernández-Jiménez, J.L. Provis, G.C. Lukey, A. Palomo,
J.S.J. Deventer, "Geopolymer technology: the current state of the art," J.
Mater. Sci., vol. 42, no. 9, pp. 2917-33, 2007.
[2] J. Davidovits, "Geopolymers - Inorganic polymeric new materials," J
Therm Anal, vol. 37, no. 8, pp. 1633-56, 1991.
[3] D. Pernica, P.N.B. Reis, J.A.M. Ferreira, P. Louda, "Effect of test
conditions on the bending strength of a geopolymer- reinforced
composite," J. Mater. Sci., vol. 45, no. 3, pp. 744-9, 2010.
[4] T. Phoo-ngernkham, Chindaprasirt P., Sata V., Hanjitsuwan S.,
Hatanaka S., "The effect of adding nano-SiO2 and nano-Al2O3 on
properties of high calcium fly ash geopolymer cured at ambient
temperature," Materials & Design, vol. 55, pp. 58-65, 2014.
[5] A. Nazari, J.G. Sanjayan, "Hybrid effects of alumina and silica
nanoparticles on water absorption of geopolymers: Application of
Taguchi approach," Measurement, vol. 60, pp. 240-6, 2015.
[6] M. Saafi, Andrew K., Tang P.L., McGhon D., Taylor S., Rahman M., et
al., "Multifunctional properties of carbon nanotube/fly ash geopolymeric
nanocomposites, "Constr. Build. Mater., vol. 49, pp. 46-55, 2013
[7] F. U. A. Shaikh, S. W. M. Supit, "Mechanical and durability properties
of high volume fly ash (HVFA) concrete containing calcium carbonate
(CaCO3) nanoparticles," Constr. Build. Mater., vol. 70, pp. 309-21,
2014.
[8] U. Rattanasak, P. Chindaprasirt, "Influence of NaOH solution on the
synthesis of fly ash geopolymer," Miner Eng, vol. 22, pp. 1073-8, 2009.
[9] N.C. Tanw, A.v. Riessen, "Determining the Reactivity of a Fly Ash for
Production of Geopolymer," J. Amer. Ceram. Soc., vol. 92, pp. 881-7,
2009.
[10] W. D. A. Rickard, R. Williams, J. Temuujin, A.v. Riessen, "Assessing
the suitability of three Australian fly ashes as an aluminosilicate source
for geopolymers in high temperature applications," Mater Sci Eng., vol.
528, no. 9, pp. 3390-7, 2011.
@article{"International Journal of Chemical, Materials and Biomolecular Sciences:71760", author = "H. Assaedi and F. U. A. Shaikh and I. M. Low", title = "Characteristics of Nanosilica-Geopolymer Nanocomposites and Mixing Effect", abstract = "This paper presents the effects of mixing procedures
on mechanical properties of flyash-based geopolymer matrices
containing nanosilica (NS) at 0.5%, 1.0%, 2.0%, and 3.0% by weight.
Comparison is made with conventional mechanical dry-mixing of NS
with flyash and wet-mixing of NS in alkaline solutions. Physical and
mechanical properties are investigated using X-Ray Diffraction
(XRD) and Scanning Electron Microscope (SEM). Results show that
generally the addition of NS particles enhanced the microstructure
and improved flexural and compressive strengths of geopolymer
nanocomposites. However, samples, prepared using dry-mixing
approach, demonstrate better physical and mechanical properties
comparing to wet-mixing samples.", keywords = "Geopolymer, mechanical properties, nanosilica.", volume = "9", number = "12", pages = "1471-8", }