The soundness of aggregates to physical changes caused by the environment is important to the long-term durability characteristics of concrete. Excessive changes in volume can be caused by freezing and thawing, thermal changes at temperatures greater than freezing, and cycles of wetting and drying. Hydrometers and Wire Baskets see Laboratory Equipment Section.
Type L50, ASTM C 88 graduated 1150 to 1200 relative density (used with sodium sulphate method). ...
Type L50, ASTM C 88 graduated 1150 to 1200 relative density (used with magnesium sulphate method). ...