NF P98-818-47*NF EN 12697-47:2010 Bituminous mixtures - Test methods for hot mix asphalt - Part 47 : determination of the ash content of natural asphalts.
2010NF P98-818-47*NF EN 12697-47:2010 Bituminous mixtures - Test methods for hot mix asphalt - Part 47 : determination of the ash content of natural asphalts.