Development and incorporation of lightweight waste-based geopolymer aggregates in mortar and concrete

authors	Yliniemi; Paiva; Ferreira; Tiainen; Illikainen
nationality	International
journal	CONSTRUCTION AND BUILDING MATERIALS
author keywords	Lightweight aggregates; Rheology; Geopolymers; Mortar; Concrete
keywords	COLD BONDING PELLETIZATION; HIGH-PERFORMANCE CONCRETE; FLY-ASH; MANUFACTURE; REACTIVITY
abstract	Using industrial side streams as artificial aggregate precursors could increase waste utilization and save natural reserves. In this study, lightweight geopolymer aggregates were manufactured from fluidized bed combustion fly ash and mine tailings using high shear granulation and alkali activation. The results showed that geopolymer aggregates had physical properties comparable to commercial lightweight expanded clay aggregates (LECAs). Mortar and concrete prepared with geopolymer aggregates had higher mechanical strength, a higher dynamic modulus of elasticity, and higher density than concrete produced with LECAs, while the rheology and workability was the same. (C) 2016 Elsevier Ltd. All rights reserved.
publisher	ELSEVIER SCI LTD
issn	0950-0618
year published	2017
volume	131
beginning page	784
ending page	792
digital object identifier (doi)	10.1016/j.conbuildmat.2016.11.017
web of science category	Construction & Building Technology; Engineering, Civil; Materials Science, Multidisciplinary
subject category	Construction & Building Technology; Engineering; Materials Science
unique article identifier	WOS:000392770300077