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Idag klassificeras bergtyp i tre klasser med hjälp av provningsmetoden kulkvarn (under 18, 18–30 eller över 30 procent). Sedan 2004, då Sverige började följa europeiska produktstandarder (SS-EN) har inte kulkvarn använts som kravparameter för de flesta materialapplikationer med krav på ballast vid byggande. Projektet går ut på att försöka förnya definitioner och gränser för olika nivåer för klassificering av berghållfasthet. Metodiken för att definiera bergtyp ska gärna vara någorlunda lättillgänglig. I denna, första, delrapport redovisas hur begreppet bergtyp används i Sverige. Det har undersökts i krav- och upphandlingsdokument samt hur och i vilken omfattning branschens aktörer använder begreppet (bergtyp). Ett antal av personer med olika roller som konsulter, beställarombud, myndigheter, laboratorier och lärosäten har svarat på enkät eller intervjuats. AMA Anläggning 20 är det kravdokument som främst använder begreppet bergtyp. Sedan finns det en del andra dokument som gör hänvisningar till AMA Anläggning och därigenom indirekt använder begreppet. Förutom för vissa konsulter och vissa på Trafikverket är intresset och användandet generellt lågt av begreppet bergtyp. Intresset är större för ett nytt system av bergtyp än det är för det nuvarande bland de som har lämnat svar. Där efterfrågas också ofta ökad användbarhet., Today (at least until 2022) the general classification of rock materials for roads and earthworks is determined by the Nordic ball mill (abrasion from studded tyres) in three levels. The classification is called rock type (1 to 3). Rock type 1: Nordic ball mill-value, AN, is less than 18, Rock type 2, AN 18 to 30 and Rock type 3: AN over 30. Since 2004, when Sweden started to adopt European standards for building materials, it has not longer been possible to have requirements for unbound layers and aggregates to the Nordic ball mill (unless for wearing coarse aggregates). The objective of this project is to find a new way of classification according to proper properties and levels. This report, which is from the first part of the project, describes how the term rock type is used in Sweden. It has been investigated in requirements and procurement documents and how and to what extent the industry's actors use the term (rock type). A few persons with different roles, such as consultants, client representatives, authorities, laboratories, and higher education institutions have responded to questionnaires or have been interviewed. AMA Anläggning 20 is the requirement document that primarily uses the concept of rock type. Then there are some other documents that make references to the AMA Anläggning and thereby indirectly use the term. Except for some consultants and some people at the Swedish Transport Administration, the interest and use are generally low in the concept of rock type. There is greater interest in a new rock-type classification system than there is in the current one among those who have provided answers. There is also often a demand for increased usability., BVFF Klassificering av Bergtyp

This thesis was created to ensure the quality of the rock which would be crushed to base layer construction material, in a road cut at Swedish highway 51, and to find a possible link between the rock's abrasion resistance and its mineralogy. Rock samples were collected, and among other things, several ball mill tests were carried out. The design of the road project was carried out by Loxia Group AB with NCC Group as contractor.A total of 18 rock samples and 2 base layer samples were taken in the area and they were all tested in a ball mill. The results showed that of the 18 rock samples, 2 samples had a ball mill value of less than 16 on the scale, 10 samples had values from 16 to 20, in addition to this, 3 samples had values from 20 to 21 and 3 samples had values in excess of 21 on the Swedish ball mill scale.Of the 3 samples with a ball mill value higher than 21, all contained a larger amount of biotite. Biotite did not appear to the same extent among the samples that ended up further down the ball mill scale. This link was so clear that a conclusion was subsequently drawn from this. The samples taken on the prefabricated base layer both had a ball mill value between 16 and 20. Overall, both the base layer and the rock material passed the Swedish Government’s Transport Administration’s requirements according to "TRVKB 10, Obundna lager". The rock type that was on the south part of the rock cut, adjacent to a deformation zone, had way too poor quality to undergo a ball mill test and therefore there are no values taken from that area.The conclusion of the work is that the rock material overall meets the Swedish Government’s Transport Administration’s requirements for base layer construction materials according to "TRVKB 10 Obundna lager", that a clear link between the proportion of biotite in a rock material and its abrasion resistance exists, and that the broken rock in the south should not be used as construction materials since the rock has insufficient mechanic