BS EN 12697-7:2022EN 12697-7:2022(E) Bituminous mixtures —Test methods Part 7: Determination of the bulk density of bituminous specimens by gamma rays 

BS EN 12697-7:2022EN 12697-7:2022(E) Bituminous mixtures —Test methods Part 7: Determination of the bulk density of bituminous specimens by gamma rays 1 Scope This document specifies a method for measuring the bulk density of pavement mixtures using atransmission-type gamma radiation test bench. This method applies to cylindrical specimens or parallelepipedal blocks, prepared in a laboratory or cutfrom a pavement.The thickness and the mass absorption coefficient, which is a function of the chemicalcomposition, are known. The thickness of the specimen body traversed by the radiation is between30 mm and 300 mm. The method cannot be applied to materials containing slags, with variable metal content or chemicalcomposition. NOTE Material containing metal or chemical compositions can affect the absorption of gamma rays. 2Normative references The following documents are referred to in the text in such a way that some or all of their contentconstitutes requirements of this document. For dated references,only the edition cited applies. Forundated references, the latest edition of the referenced document(including any amendments) applies.EN 12697-6，Bituminous mixtures - Test methods - Part 6: Determination of bulk density ofbituminous specimens 3Terms and definitions For the purposes of this document, the following terms and definitions apply. IS0 and IEC maintain terminological databases for use in standardization at the following addresses:—IEC Electropedia: available at https://www.electropedia.org/ -ISO online browsing platform: available at https://www.iso.org/obp