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Los Angeles talets beroende av sprickfrekvens och kornform hos två mellansvenska täkter
2016 (Swedish)Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
Abstract [en]

In this thesis the connection between the Los Angeles method (LA method) and three quality parameters from two quarries is investigated. The goal has been to decide if and in what way the parameters micro cracks, fleakiness index and particle length affects the result of the LA method. The LA method is a standardized method that evaluates an aggregates ability to resist crushing degradation. The result of the method is called Los Angeles value (LA value).The test material was collected from the quarries Forserum and Räppe. There were samples from four products collected from each quarries. At Skanska’s lab in Vällsta the analysis of LA method, fleakiness index, particle length and particle density was made. An extra value of the LA method called called RLA was also analyzed. The analysis of the micro cracks was made at CBI in Borås. There was a distinct connection between the LA-value of the products from Räppe and all types of micro cracks. In Forserum there was a connection between the LA-number and the shape of the rocks and the number of big cracks per rock. One interesting observation was the connection in between Räppe’s RLA-number and the shape of the rock, something that was not shown by the comparison of LA-number and shapes. This could mean a LA-method with both LA-number and RLA-number gives the LA-method a more nuanced value.

Place, publisher, year, edition, pages
Keyword [en]
Keyword [sv]
Teknik, Ballast, mikrosprickor, Los Angeles metoden, flisighetsindex, kornform, bergtäkt
URN: urn:nbn:se:ltu:diva-53468Local ID: a7a0b5e7-d0c9-492c-9a88-cb6a1254c94fOAI: diva2:1026842
External cooperation
Subject / course
Student thesis, at least 15 credits
Educational program
Mining and Geotechnical Engineering, bachelor's level
Validerat; 20160110 (global_studentproject_submitter)Available from: 2016-10-04 Created: 2016-10-04Bibliographically approved

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