DIN EN 451-1:2017-08

This European Standard specifies the procedure for the determination of free calcium oxide content in fly ash. This European Standard specifies the reference procedure. If other methods are used it needs to be shown that they give results equivalent to those obtained by the reference method. This standard differs from DIN EN 451-1:2004-05 as follows: a) information on repeatability and reproducibility has been adapted; b) the standard has been editorially revised. Working Committee NA 005-07-24 AA "Betonzusatzstoffe (SpA zu CEN/TC 104/WG 4, SpA zu CEN/TC 104/WG 9, SpA zu CEN/TC 104/WG 15)" ("Additions for concrete (national mirror committee of CEN/TC 104/WG 4, CEN/TC 104/WG 9, CEN/TC 104/WG 15)") at DIN Standards Committee Building and Civil Engineering (NABau) is responsible for the German collaboration.