期刊
CONSTRUCTION AND BUILDING MATERIALS
卷 159, 期 -, 页码 610-616出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.conbuildmat.2017.11.015
关键词
Amorphous silica; Cementitious materials; Raman microscope; Raman spectroscopy; Silica fume
资金
- QNano Project - European Community Research Infrastructures under the FP7 Capacities Programme [INFRA-2010-262163]
- Centre for Research on Adaptive Nanostructures and Nanodevices (CRANN)
Silica fume (SF) is an essential material for formulating high performance concrete (HPC). However, its small particle size could cause safety-hazards. Although replacing SF powder with slurry can somehow avoid the potential bio-toxicity, its long-term stability within cementitious materials is unknown. In this study, Raman microscope which combines Raman spectroscopy with light-optical microscope was successfully applied to characterise the composition and morphology of SF in original slurry and hydrated SF-Portland cement (PC) pastes. The unhydrated SF-agglomerates were clearly detected in the original SF slurry and the 22-hour and 6-month hydrated SF-PC pastes. (C) 2017 Elsevier Ltd. All rights reserved.
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