Effect of Fly Ash Fineness on Sorption Properties of Geopolymers Based On Liquid Glass
Fly ash (FA) thanks to the significant presence of SiO2
and Al2O3 as the main components is a potential raw material for
geopolymers production. Mechanical activation is a method for
improving FA reactivity and also the porosity of final mixture; those
parameters can be analysed through sorption properties. They have
direct impact on the durability of fly ash based geopolymer mortars.
In the paper, effect of FA fineness on sorption properties of
geopolymers based on sodium silicate, as well as relationship
between fly ash fineness and apparent density, compressive and
flexural strength of geopolymers are presented. The best results in the
evaluated area reached the sample H1, which contents the highest
portion of particle under 20μm (100% of GFA). The interdependence
of individual tested properties was confirmed for geopolymer
mixtures corresponding to those in the cement based mixtures: higher
is portion of fine particles < 20μm, higher is strength, density and
lower are sorption properties. The compressive strength as well as
sorption parameters of the geopolymer can be reasonably controlled
by grinding process and also ensured by the higher share of fine
particle (to 20μm) in total mass of the material.
[1] J. Junak, N. Stevulova, “Alkali activated binder based on fly ash,
“Chemicals sheets, Vol. 108, No. 6, pp. 620-623, 2014 (in Slovak).
[2] J. Junak, N. Stevulova, “Activation techniques of coal fly ash for its
application as a partial cement replacement in concrete,“ Folia
Oecologica 3, Vol. 51, No. 3, pp. 142-147, 2010.
[3] K. Komintsas and D. Zaharaki, “Geopolymerisation: A review and
prospects for the mineral industry,” Mineral Engineering 20, pp. 1261–
1277, 2007.
[4] G. Mucsi, J. Lakatos, Z. Molnar and R. Szabo, “Development of
geopolymer using industrial waste materials”, in Proc. The 9th
International Conference “Environmental engineering,” Vilnius,
Lithuania, 2014, ISBN 978-609-457-640-9
[5] J. Davidovits, Geopolymer Chemistry and Application, Institut
Geopolimére, Saint Quentin (France), 2008.
[6] P. Balaz and M. Achimovicova, “Mechano-chemical leaching in
hydrometallurgy of complex sulphides,” Hydrometallurgy, Vol. 84, Iss.
1–2, p. 60–68, October 2006.
[7] P. Balaz, Extractive Metallurgy of Activated Minerals, Elsevier,
Amsterdam 2000, p. 278.
[8] Tkacova, K. Mechanical Activation of Minerals, Elsevier, Amsterdam
1989, p. 293
[9] N. Marjanović, Komljenović, Z. Bascarević and V. Nikolić, “Improving
reactivity of fly ash and properties of ensuing geopolymers through
mechanical activation,” Construction and Building Materials. Vol. 57,
pp. 151-162, 2014.
[10] S. Tokchom et al., “Effect of water absorption, porosity, and sorptivity
on durability of geopolymer mortars,” ARPN Journal of Engineering
and Applied Sciences, Vol. 4, pp. 28-32, 2009.
[11] Z. F. Farhana et al., “The relationship between water absorption and
porosity for geopolymer paste,” Materials Science Forum. Vol. 803, pp.
166-172 2015.
[12] G. Lagaly, W. Tufar, A. Minihan and A. Lovell, "Silicates" in Ullmann's
Encyclopedia of Industrial Chemistry, Wiley-VCH, 2005.
[13] STN 73 1316, Determination of moisture, water absorption and
capillarity of concrete, national standard, 1989.
[14] EN 1015-18, Methods of test for mortar for masonry. Part 18:
Determination of water absorption coefficient due to capillary action of
hardened mortar, 2003.
[15] EN 1015-11, Methods of test for mortar for masonry. Part 11:
Determination of flexural and compressive strength of hardened mortar,
2001.
[16] N. Sivakumar and L. Tan, “Effect of fly ash fineness on the performance
of cement mortar,” Jordan Journal of Civil Engineering, Vol. 7, No. 3,
2013.
[17] M. Komljenovic, “Mechanical and microtructural properties of alkaliactivated
fly ash geopolymers,“ Journal of Hazardous Materials, Vol.
181, pp. 35-42, 2010.
[18] P. Chindaprasirt, Ch. Jaturapitakkul and T. Sinsiri, “Effect of fly ash
fineness on compressive strength and pore size of blended cement
paste,” Cement & Concrete Composites, Vol. 27, pp. 425-428, 2005.
[1] J. Junak, N. Stevulova, “Alkali activated binder based on fly ash,
“Chemicals sheets, Vol. 108, No. 6, pp. 620-623, 2014 (in Slovak).
[2] J. Junak, N. Stevulova, “Activation techniques of coal fly ash for its
application as a partial cement replacement in concrete,“ Folia
Oecologica 3, Vol. 51, No. 3, pp. 142-147, 2010.
[3] K. Komintsas and D. Zaharaki, “Geopolymerisation: A review and
prospects for the mineral industry,” Mineral Engineering 20, pp. 1261–
1277, 2007.
[4] G. Mucsi, J. Lakatos, Z. Molnar and R. Szabo, “Development of
geopolymer using industrial waste materials”, in Proc. The 9th
International Conference “Environmental engineering,” Vilnius,
Lithuania, 2014, ISBN 978-609-457-640-9
[5] J. Davidovits, Geopolymer Chemistry and Application, Institut
Geopolimére, Saint Quentin (France), 2008.
[6] P. Balaz and M. Achimovicova, “Mechano-chemical leaching in
hydrometallurgy of complex sulphides,” Hydrometallurgy, Vol. 84, Iss.
1–2, p. 60–68, October 2006.
[7] P. Balaz, Extractive Metallurgy of Activated Minerals, Elsevier,
Amsterdam 2000, p. 278.
[8] Tkacova, K. Mechanical Activation of Minerals, Elsevier, Amsterdam
1989, p. 293
[9] N. Marjanović, Komljenović, Z. Bascarević and V. Nikolić, “Improving
reactivity of fly ash and properties of ensuing geopolymers through
mechanical activation,” Construction and Building Materials. Vol. 57,
pp. 151-162, 2014.
[10] S. Tokchom et al., “Effect of water absorption, porosity, and sorptivity
on durability of geopolymer mortars,” ARPN Journal of Engineering
and Applied Sciences, Vol. 4, pp. 28-32, 2009.
[11] Z. F. Farhana et al., “The relationship between water absorption and
porosity for geopolymer paste,” Materials Science Forum. Vol. 803, pp.
166-172 2015.
[12] G. Lagaly, W. Tufar, A. Minihan and A. Lovell, "Silicates" in Ullmann's
Encyclopedia of Industrial Chemistry, Wiley-VCH, 2005.
[13] STN 73 1316, Determination of moisture, water absorption and
capillarity of concrete, national standard, 1989.
[14] EN 1015-18, Methods of test for mortar for masonry. Part 18:
Determination of water absorption coefficient due to capillary action of
hardened mortar, 2003.
[15] EN 1015-11, Methods of test for mortar for masonry. Part 11:
Determination of flexural and compressive strength of hardened mortar,
2001.
[16] N. Sivakumar and L. Tan, “Effect of fly ash fineness on the performance
of cement mortar,” Jordan Journal of Civil Engineering, Vol. 7, No. 3,
2013.
[17] M. Komljenovic, “Mechanical and microtructural properties of alkaliactivated
fly ash geopolymers,“ Journal of Hazardous Materials, Vol.
181, pp. 35-42, 2010.
[18] P. Chindaprasirt, Ch. Jaturapitakkul and T. Sinsiri, “Effect of fly ash
fineness on compressive strength and pore size of blended cement
paste,” Cement & Concrete Composites, Vol. 27, pp. 425-428, 2005.
@article{"International Journal of Architectural, Civil and Construction Sciences:69857", author = "M. Zelinkova and M. Ondova", title = "Effect of Fly Ash Fineness on Sorption Properties of Geopolymers Based On Liquid Glass", abstract = "Fly ash (FA) thanks to the significant presence of SiO2
and Al2O3 as the main components is a potential raw material for
geopolymers production. Mechanical activation is a method for
improving FA reactivity and also the porosity of final mixture; those
parameters can be analysed through sorption properties. They have
direct impact on the durability of fly ash based geopolymer mortars.
In the paper, effect of FA fineness on sorption properties of
geopolymers based on sodium silicate, as well as relationship
between fly ash fineness and apparent density, compressive and
flexural strength of geopolymers are presented. The best results in the
evaluated area reached the sample H1, which contents the highest
portion of particle under 20μm (100% of GFA). The interdependence
of individual tested properties was confirmed for geopolymer
mixtures corresponding to those in the cement based mixtures: higher
is portion of fine particles < 20μm, higher is strength, density and
lower are sorption properties. The compressive strength as well as
sorption parameters of the geopolymer can be reasonably controlled
by grinding process and also ensured by the higher share of fine
particle (to 20μm) in total mass of the material.", keywords = "Alkali activation, geopolymers, fly ash, particle
fineness.", volume = "9", number = "5", pages = "583-5", }