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Application of Raman spectroscopy for tracing the status of silica fume in cementitious materials

Yue, Y; Bai, Y; Wang, JJ; (2016) Application of Raman spectroscopy for tracing the status of silica fume in cementitious materials. In: Proceedings of 5th International Conference on the Durability of Concrete Structures - 2016. (pp. pp. 174-178). Shenzhen University, Shenzhen, Guangdong Province,: China. Green open access

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Abstract

Silica fume (SF) is an important component for manufacturing high performance concrete (HPC), owing to its superb pozzolanic reactivity and physical filling effects. However, application of SF in concrete may cause potential hazards issues. Although using SF in slurry form can somehow reduce the potential biotoxicity, the long-term stability and status of the SF particles within cementitious materials is still uncertain. In the current study, attempts were made to use Raman spectroscopy as an innovative alternative technique for tracing and identifying the status of SF both in its original SF slurry and in a 6-month-old hydrated cement paste. Light-optical microscope was also used to examine the morphology of the SF particles in the aforementioned samples. The results showed that under Raman spectroscopy, the various components of the SF in slurry, such as amorphous silica, silicon crystal, and carbon, were clearly recognised. In addition, the SF agglomerates formed in the slurry were also detected. On the other hand, the chemical composition, status, and morphology of both SF and SF agglomerates in the 6-month-old paste were also identified. The study reported in this paper indicates that Raman spectroscopy could be a potential technique for tracing the status of SF, so that the potential safety hazards of SF can be monitored.

Type: Proceedings paper
Title: Application of Raman spectroscopy for tracing the status of silica fume in cementitious materials
Event: 5th International Conference on the Durability of Concrete Structures
Location: Shenzhen, China
Dates: 30 June 2016 - 01 July 2016
Open access status: An open access version is available from UCL Discovery
DOI: 10.5703/1288284316128
Publisher version: http://doi.org/10.5703/1288284316128
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
UCL classification: UCL
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/1523326
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