Journal
CONSTRUCTION AND BUILDING MATERIALS
Volume 179, Issue -, Pages 49-56Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.conbuildmat.2018.05.183
Keywords
Alkali-aggregate reaction; Blast-furnace slag; Blended cement; Alkali-activated Portland blended cement; Hybrid cement
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Funding
- Universidad del Valle (Cali-Colombia)
- Administrative Department of Science, Technology and Innovation in Colombia (Colciencias)
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This report evaluates the performance to alkali-aggregate reaction of two types of binder systems: a Portland blended cement and an Alkali-activated Portland blended cement. The first system consists of 80% granulated blast furnace slag and 20% Portland cement (OPC) and was hydrated in the presence of water (CE), whereas the second incorporated an alkaline activator, making it a hybrid cement (HB). Expansion measurements of mortar bars were carried out, and their behaviour was compared to a reference system based on 100% OPC. Additionally, a microstructural characterization was performed using scanning electron microscopy. The results show that CE and HB cements had smaller expansions than OPC, although Rosette and pseudo-Rosette structures were observed. (C) 2018 Elsevier Ltd. All rights reserved.
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