Glass beads for road markings and other industrial usage: Crystallinity and hazardous elements
Road markings, a necessary road safety feature, always contain a layer of glass beads that deliver retroreflectivity for driving at night and simultaneously protect the underlying paint layer. Even though such glass beads were generally considered as harmless, their analysis for the presence of crys...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2022-12-01
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| Series: | Case Studies in Construction Materials |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S221450952200345X |
| _version_ | 1818547503195226112 |
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| author | Tomasz E. Burghardt Karl Ettinger Birgit Köck Christoph Hauzenberger |
| author_facet | Tomasz E. Burghardt Karl Ettinger Birgit Köck Christoph Hauzenberger |
| author_sort | Tomasz E. Burghardt |
| collection | DOAJ |
| description | Road markings, a necessary road safety feature, always contain a layer of glass beads that deliver retroreflectivity for driving at night and simultaneously protect the underlying paint layer. Even though such glass beads were generally considered as harmless, their analysis for the presence of crystalline silica was not reported so far. To fill the knowledge gap and to confirm the common perception, representative types of glass beads (11 samples from 6 manufacturing plants worldwide) were evaluated for the presence of crystalline phases by X-ray diffraction and their surface was analysed under scanning electron microscope. The study has not indicated the presence of a crystalline phase in amount higher than environmental background and no irregular shard-like surface features were found under microscope. In addition, analysis with inductively coupled plasma – mass spectrometry revealed only marginal content of hazardous elements. The same results were obtained with glass beads manufactured in identical process but used for other industrial applications. This assessment confirmed that the analysed classes of industrial glass beads are fully annealed and amorphous material that is free from hazardous ingredients. |
| first_indexed | 2024-12-12T08:07:36Z |
| format | Article |
| id | doaj.art-af38c28cd1e9451eb9f879f12219676c |
| institution | Directory Open Access Journal |
| issn | 2214-5095 |
| language | English |
| last_indexed | 2024-12-12T08:07:36Z |
| publishDate | 2022-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Construction Materials |
| spelling | doaj.art-af38c28cd1e9451eb9f879f12219676c2022-12-22T00:31:54ZengElsevierCase Studies in Construction Materials2214-50952022-12-0117e01213Glass beads for road markings and other industrial usage: Crystallinity and hazardous elementsTomasz E. Burghardt0Karl Ettinger1Birgit Köck2Christoph Hauzenberger3M. Swarovski Gesellschaft m.b.H., Wipark, 14. Straße 11, 3363 Neufurth, Austria; Corresponding author.University of Graz, Universitätsplatz 2, 8010 Graz, AustriaM. Swarovski Gesellschaft m.b.H., Wipark, 14. Straße 11, 3363 Neufurth, AustriaUniversity of Graz, Universitätsplatz 2, 8010 Graz, AustriaRoad markings, a necessary road safety feature, always contain a layer of glass beads that deliver retroreflectivity for driving at night and simultaneously protect the underlying paint layer. Even though such glass beads were generally considered as harmless, their analysis for the presence of crystalline silica was not reported so far. To fill the knowledge gap and to confirm the common perception, representative types of glass beads (11 samples from 6 manufacturing plants worldwide) were evaluated for the presence of crystalline phases by X-ray diffraction and their surface was analysed under scanning electron microscope. The study has not indicated the presence of a crystalline phase in amount higher than environmental background and no irregular shard-like surface features were found under microscope. In addition, analysis with inductively coupled plasma – mass spectrometry revealed only marginal content of hazardous elements. The same results were obtained with glass beads manufactured in identical process but used for other industrial applications. This assessment confirmed that the analysed classes of industrial glass beads are fully annealed and amorphous material that is free from hazardous ingredients.http://www.sciencedirect.com/science/article/pii/S221450952200345XBlasting beadsFiller beadsCristobaliteCrystalline silicaX-ray diffraction |
| spellingShingle | Tomasz E. Burghardt Karl Ettinger Birgit Köck Christoph Hauzenberger Glass beads for road markings and other industrial usage: Crystallinity and hazardous elements Case Studies in Construction Materials Blasting beads Filler beads Cristobalite Crystalline silica X-ray diffraction |
| title | Glass beads for road markings and other industrial usage: Crystallinity and hazardous elements |
| title_full | Glass beads for road markings and other industrial usage: Crystallinity and hazardous elements |
| title_fullStr | Glass beads for road markings and other industrial usage: Crystallinity and hazardous elements |
| title_full_unstemmed | Glass beads for road markings and other industrial usage: Crystallinity and hazardous elements |
| title_short | Glass beads for road markings and other industrial usage: Crystallinity and hazardous elements |
| title_sort | glass beads for road markings and other industrial usage crystallinity and hazardous elements |
| topic | Blasting beads Filler beads Cristobalite Crystalline silica X-ray diffraction |
| url | http://www.sciencedirect.com/science/article/pii/S221450952200345X |
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