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Tracing the status of silica fume in cementitious materials with Raman microscope

Yue, Y; Wang, JJ; Bai, Y; (2018) Tracing the status of silica fume in cementitious materials with Raman microscope. Construction and Building Materials , 159 pp. 610-616. 10.1016/j.conbuildmat.2017.11.015. Green open access

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Abstract

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.

Type: Article
Title: Tracing the status of silica fume in cementitious materials with Raman microscope
Open access status: An open access version is available from UCL Discovery
DOI: 10.1016/j.conbuildmat.2017.11.015
Publisher version: http://doi.org/10.1016/j.conbuildmat.2017.11.015
Language: English
Additional information: © 2017 Elsevier Ltd. All rights reserved. This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Amorphous silica; Cementitious materials; Raman microscope; Raman spectroscopy; Silica fume
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Civil, Environ and Geomatic Eng
URI: https://discovery.ucl.ac.uk/id/eprint/10038594
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