Knowing the density of bitumen helps you to assess the strength and durability of the paving. BS EN 12697-7 is the seventh part of the ‘bituminous mixtures – Test methods for hot mix asphalt’ multi-series. BS EN 12697-7 specifies a method for measuring the bulk density of pavement mixtures using a transmission-type gamma radiation test bench.
The applicability of BS EN 12697-7 is described in the product standards for bituminous mixtures.
The safety regulations applicable to the use of gamma rays should be applied.
BS EN 12697-7 applies to cylindrical specimens or blocks, prepared in a laboratory or cut from the pavement, the thickness and the mass absorption coefficient which is a function of the chemical composition are known. The thickness of the specimen body traversed by the radiation shall be between 30 mm and 300 mm.
Note: The method cannot be applied to materials containing slags, with variable metal content or chemical composition which may affect the absorption of gamma rays.
BS EN 12697-7 on the determination of bulk density of bituminous specimens by gamma rays is useful for:
Bulk density measurement in the laboratory using gamma rays is a method that does not affect the properties of the material. BS EN 12697-7 can be included in a series of tests carried out on a given sample. BS EN 12697-7 allows the plotting of a density chart or gradient.
The test methods given in BS EN 12697-7 are designed for use with laboratory compacted materials or specimens taken from the pavement following coring or sawing. BS EN 12697-7 can assist you in preventing specimen damage throughout the separation procedure.
With BS EN 12697-6, the bulk density of the samples can be checked to ensure that the air voids content is within the method's stated range.
BS EN 12697-6 guidelines help you assess the quality and performance of the asphalt. This enhances the durability and service life of roads and pavements.
BS EN 12697-7:2014 supersedes BS EN 12697-7:2002 which is withdrawn. BS EN 12697-7:2014 includes some technical changes with respect to BS EN 12697-7:2002. These include:
EN 12697-7:2014