Determination of acid-soluble sulfates

The determination of sulfate ions is applied to both natural aggregates and air-cooled blastfurnace slags according to CEN EN 1744-1 (2009), paragraph 12. 

Sulfates are extracted from a representative mass of aggregates (about 2 g, passing through the 0.125 mm sieve) by dilute hydrochloric acid and determined gravitationally (from subsidence of sediment). Sulfate ion content is expressed as a percentage by mass of aggregate. More information can be found in CEN EN 1744-1 (2009). 

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