Journal
CONSTRUCTION AND BUILDING MATERIALS
Volume 160, Issue -, Pages 48-56Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.conbuildmat.2017.11.044
Keywords
Carbon dioxide sequestration; Fly ash; Recycled aggregates; Hemp fibres; Alkali-activated mortars
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Funding
- Foundation for Science and Technology (FCT) [IF/00706/2014-UM.2.15]
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Carbon dioxide sequestration is crucial for targets for limiting global warming could be achieved. This paper discloses results of an investigation concerning the performance of fly ash/waste glass alkaline-based mortars with recycled aggregates reinforced by hemp fibres exposed to accelerated carbon dioxide curing. Compressive strength, freeze-thaw resistance, carbon footprint and cost were studied. The results show that hemp fibres lead to a reduction of mechanical properties of alkali-activated materials. A high correlation was found between compressive and flexural strength. The results also show that accelerated curing provides a high carbon sequestration. Furthermore, the use of at least 8% hemp fibres leads to carbon negative emissions -19.7 kgCO(2)eq/m(3) for fly ash/waste glass alkaline-based mortars with recycled aggregates based composites. (C) 2017 Elsevier Ltd. All rights reserved.
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