Waste glass from end-of-life fluorescent lamps as raw material in geopolymers
authors Novais, RM; Ascensao, G; Seabra, MP; Labrincha, JA
nationality International
journal WASTE MANAGEMENT
author keywords Geopolymers; Fluorescent lamp waste glass; Mechanical properties; Porosity
keywords METAKAOLIN-BASED GEOPOLYMERS; ASH-BASED GEOPOLYMERS; FLY-ASH; MECHANICAL-PROPERTIES; THERMAL-CONDUCTIVITY; MICROSTRUCTURE; STRENGTH; ACTIVATION; HYDROXIDE; RECOVERY
abstract Nowadays the stunning volume of generated wastes, the exhaustion of raw materials, and the disturbing greenhouse gases emission levels show that a paradigm shift is mandatory. In this context, the possibility of using wastes instead of virgin raw materials can mitigate the environmental problems related to wastes, while reducing the consumption of the Earth's natural resources. This innovative work reports the incorporation of unexplored waste glass coming from end-of-life fluorescent lamps into geopolymers. The influence of the waste glass incorporation level, NaOH molarity and curing conditions on the microstructure, physical and mechanical properties of the geopolymers was evaluated. Results demonstrate that curing conditions are the most influential factor on the geopolymer characteristics, while the NaOH molarity is less important. Geopolymers containing 37.5% (wt) waste glass were successfully produced, showing compressive strength of 14 MPa (after 28 days of curing), suggesting the possibility of their use in non-structural applications. Porous waste-based geopolymers for novel applications were also fabricated. (C) 2016 Elsevier Ltd. All rights reserved.
publisher PERGAMON-ELSEVIER SCIENCE LTD
issn 0956-053X
year published 2016
volume 52
beginning page 245
ending page 255
digital object identifier (doi) 10.1016/j.wasman.2016.04.003
web of science category Engineering, Environmental; Environmental Sciences
subject category Engineering; Environmental Sciences & Ecology
unique article identifier WOS:000377310300026
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