Effect of synthesis parameters on the mechanical properties of fly ash-based geopolymers

Panias, D; Giannopoulou, IP; Perraki, T

dc.contributor.author	Panias, D	en
dc.contributor.author	Giannopoulou, IP	en
dc.contributor.author	Perraki, T	en
dc.date.accessioned	2014-03-01T01:26:12Z
dc.date.available	2014-03-01T01:26:12Z
dc.date.issued	2007	en
dc.identifier.issn	0927-7757	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/17969
dc.subject	Fly ash	en
dc.subject	Geopolymers	en
dc.subject	Inorganic polymers	en
dc.subject	Silicates	en
dc.subject.classification	Chemistry, Physical	en
dc.subject.other	Geopolymerization	en
dc.subject.other	Geopolymers	en
dc.subject.other	Sodium hydroxide	en
dc.subject.other	Sodium silicate	en
dc.subject.other	Fly ash	en
dc.subject.other	Fourier transform infrared spectroscopy	en
dc.subject.other	Polymerization	en
dc.subject.other	Silicates	en
dc.subject.other	Sodium compounds	en
dc.subject.other	Synthesis (chemical)	en
dc.subject.other	Inorganic polymers	en
dc.subject.other	crystallin	en
dc.subject.other	geopolymer	en
dc.subject.other	polymer	en
dc.subject.other	silicate	en
dc.subject.other	sodium hydroxide	en
dc.subject.other	unclassified drug	en
dc.subject.other	water	en
dc.subject.other	analytic method	en
dc.subject.other	article	en
dc.subject.other	compressive strength	en
dc.subject.other	concentration (parameters)	en
dc.subject.other	fly ash	en
dc.subject.other	infrared spectroscopy	en
dc.subject.other	molecular mechanics	en
dc.subject.other	polymerization	en
dc.subject.other	priority journal	en
dc.subject.other	synthesis	en
dc.subject.other	water content	en
dc.subject.other	X ray diffraction	en
dc.title	Effect of synthesis parameters on the mechanical properties of fly ash-based geopolymers	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.colsurfa.2006.12.064	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.colsurfa.2006.12.064	en
heal.language	English	en
heal.publicationDate	2007	en
heal.abstract	In this paper the effect of the water, sodium hydroxide and sodium silicate contents in the synthesis of fly ash-based geopolymers on their compressive strength is investigated. X-ray diffractograms of geopolymers indicated the existence of the major crystalline phases of fly ash, as well as the formation of a new amorphous phase in the geopolymeric matrices. Fourier-transform infrared (FTIR) spectroscopy analysis revealed essential fly ash phase transformations within geopolymers that affected their mechanical strength. Compressive strength of the produced geopolymers is correlated with the role that the investigated parameters play in the geopolymerization process. The compressive strength is increased with the decrease of water content, as well as with the increase of sodium silicate in the synthesis of geopolymers. Concerning the sodium hydroxide content in the geopolymers synthesis compressive strength is observed to being optimized for a sodium hydroxide concentration in the aqueous phase equal to 6.6 M. In general, a compromise among the investigated parameters might lead to geopolymeric materials with a compressive strength higher than 40 MPa. (C) 2007 Elsevier B.V. All rights reserved.	en
heal.publisher	ELSEVIER SCIENCE BV	en
heal.journalName	Colloids and Surfaces A: Physicochemical and Engineering Aspects	en
dc.identifier.doi	10.1016/j.colsurfa.2006.12.064	en
dc.identifier.isi	ISI:000246835400035	en
dc.identifier.volume	301	en
dc.identifier.issue	1-3	en
dc.identifier.spage	246	en
dc.identifier.epage	254	en