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AASHTO T 330-07 (2015)
- Standard Method of Test for The Qualitative Detection of Harmful Clays of the Smectite Group in Aggregates Using Methylene Blue
- standard by American Association of State and Highway Transportation Officials, 2007
- Publisher: AASHTO
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The purpose of this standard is to identify the presence of harmful clays of the smectite group(poor minus 75-µm material) and to provide an indication of the surface activity of the aggregate.