Valorization of CDWs through Geopolymerization

Kioupis, D.; Gaitanis, D.; Skaropoulou, A.; Tsivilis, S.; Kakali, G.

dc.contributor.author	Kioupis, D.	en
dc.contributor.author	Gaitanis, D.	en
dc.contributor.author	Skaropoulou, A.	en
dc.contributor.author	Tsivilis, S.	en
dc.contributor.author	Kakali, G.	en
dc.date.accessioned	2018-07-20T09:55:11Z
dc.date.available	2018-07-20T09:55:11Z
dc.date.issued	2018-07-20
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/47368
dc.language.iso	en	en
dc.rights	Default License
dc.subject	CDW	en
dc.subject	bricks	en
dc.subject	tiles	en
dc.subject	geopolymers	en
dc.subject	Taguchi	en
dc.title	Valorization of CDWs through Geopolymerization	en
heal.type	conferenceItem
heal.classification	construction materials	en
heal.classification	wastes	en
heal.language	el
heal.access	free
heal.recordProvider	ntua	el
heal.publicationDate	2017
heal.bibliographicCitation	Δ. Κιούπης, Α. Γαϊτάνης, Α. Σκαροπούλου, Σ. Τσιβιλής, Γ. Κακάλη, Σύνθεση και χαρακτηρισμός δομικών υλικών από απόβλητα τοιχοποιίας, 11ο Πανελλήνιο Συνέδριο Χημικής Μηχανικής, Θεσσαλονίκη, (2017), 1-8.	el
heal.abstract	Construction and Demolition Wastes (CDWs) are one of the heaviest and most voluminous solid wastes worldwide with their deposition posing a significant environmental impact. An important part of the CDWs, such as masonry materials (e.g., bricks and tiles) are aluminosilicate sourced and can be valorized in the development of alternative building materials (geopolymers) with low environmental footprint. In the present study, brick and tile wastes were reused as raw materials for the preparation of geopolymers. The results of alkali dissolution tests which determine the Si and Al leachability showed that the brick wastes are stronger affected by the alkaline attack than the tile wastes. The optimization of the synthesis was performed by applying the Taguchi multifactorial design of experiments based on compressive strength of the final products. The mathematical processing of the results reveal that the factors with the highest contribution on the mechanical behavior of the specimens are the alkalinity (R/Al, R: Na or K) and the soluble silicon content ([Si]/R2O) of the activation solutions. The optimum synthesis factors for the delivery of products with enhanced compressive strength values (41 MPa) are the following: [Si]/R2O=1, R/Al=1.0, Na/Na+K=0.5, Τ=90oC and t =72 h.	en
heal.fullTextAvailability	true
heal.conferenceName	11th Panhellenic Scientific Conference of Chemical Engineering	en
heal.conferenceItemType	full paper