ASTM D7402-09
Standard Practice for Identifying Cationic Emulsified Asphalts
- Standard No.
- ASTM D7402-09
- Release Date
- 2009
- Published By
- American Society for Testing and Materials (ASTM)
- Status
- Replace By
- ASTM D7402-09(2017)
- Latest
- ASTM D7402-09(2017)
- Scope
Cationic emulsified asphalts are identified by the migration of the particles to a negatively charged electrode (cathode) by means of a direct current. Aggregates and sands used in conjunction with emulsified asphalts are often predominantly either negatively or positively charged. Emulsified asphalts should be selected to be compatible with the available aggregate or sand. This practice will aid in identifying a cationic type of emulsified asphalt as defined by Specification D 2397
. 1.1 This practice is used to identify cationic emulsified asphalts. Positively charged particles are classified as cationic. Emulsified asphalts that don’t register a positive charge may also be classified as cotionic slow-setting if they coat a specific type of negatively charged silica sand.
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
ASTM D7402-09 Referenced Document
- ASTM C778 Standard Specification for Standard Sand
- ASTM D2397 Standard Specification for Cationic Emulsified Asphalt
- ASTM E1 Standard Specification for ASTM Thermometers
ASTM D7402-09 history
- 2017 ASTM D7402-09(2017) Standard Practice for Identifying Cationic Emulsified Asphalts
- 2009 ASTM D7402-09 Standard Practice for Identifying Cationic Emulsified Asphalts
