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ASTM D7402-09

Current Revision

Standard Practice for Identifying Cationic Emulsified Asphalts

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1.1 This practice is used to identify cationic emulsified asphalts. Positively charged particles are classified as cationic. Emulsified asphalts that dont 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.

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.

SDO ASTM: ASTM International
Document Number D7402
Publication Date June 1, 2009
Language en - English
Page Count 4
Revision Level 09
Supercedes
Committee D04.42
Publish Date Document Id Type View
June 1, 2009 D7402-09 Revision
Oct. 1, 2017 D7402-09R17 Reaffirmation