Abstract
The geological features and mechanical properties of metamorphosed volcanic and sedimentary rocks from a quarry in southern Finland were studied. Resistance to wear (from the studded tyres test and Los Angeles test) and petrography were used as quality indicators. The study reported was undertaken some 5 years after the opening of Pirkanmaa rock quarry in order to optimise the environmental and economic benefits. The study draws attention to the importance of the assessment of geologically heterogeneous rock quarries which makes it possible to produce a wider range of aggregates from the same quarry for various construction purposes, maximise the crushing process and minimise changes in aggregate quality.
Résumé
Les caractéristiques géologiques et les propriétés mécaniques de roches métamorphiques, d’origine volcanique ou sédimentaire, ont été étudiées dans une carrière du sud de la Finlande. La nature pétrographique et la résistance à l’usure (à partir du test aux pneus cloutés et de l’essai Los Angeles) ont été utilisées comme indicateurs de qualité. L’étude présentée a été réalisée environ cinq ans après l’ouverture de la carrière de Pirkanmaa avec des préoccupations environnementales et économiques. L’article attire l’attention sur l’intérêt d’une étude détaillée des carrières géologiquement hétérogènes, à partir desquelles une production d’une large gamme de granulats est possible pour des usages très variés dans la construction. De telles études permettent de plus d’optimiser les procédés de concassage et de minimiser les changements de qualité des granulats produits.
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Acknowledgements
The authors are grateful to Veli Suominen of the Geological Survey of Finland, Hanna Järvenpää and Martti Kärkkäinen of Lohja Rudus Oy Ab, and Paula Kosunen, Yrjö Kähkönen and Arto Luttinen of the University of Helsinki, for their support and helpful discussion throughout this study, and to Matti Mertamo of Lemminkäinen Ltd for assistance in the laboratory work. We are also grateful to Anthony Meadows for language revision. Lohja Rudus Oy Ab, The Graduate School in Rock Engineering and the Foundation for Research of Natural Resources in Finland gave financial support.
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Räisänen, M., Torppa, A. Quality assessment of a geologically heterogeneous rock quarry in Pirkanmaa county, southern Finland. Bull Eng Geol Environ 64, 409–418 (2005). https://doi.org/10.1007/s10064-005-0006-1
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DOI: https://doi.org/10.1007/s10064-005-0006-1
Keywords
- Aggregate
- Los Angeles test
- Studded tyres test
- Quality assessment
- Heterogeneous quarries
- Geological mapping