1. Scope
1.1 This practice is designed to recover an essentially asphalt-free aqueous phase from emulsified asphalts in which it is desirable to test for or recover material in that phase. This practice may be used for polymer modified emulsified asphalts in which the polymer was added in the form of latex or for other cases in which other materials have been dispersed in emulsified asphalts. It may also be of used to obtain a sample that could be used for other evaluations of the aqueous phase of an emulsion in which asphalt is the only dispersed phase. 1.2. There are two procedures described. The first one is based on separating a non-asphaltic dispersed phase that is lighter than water from the dispersed asphalt phase or for other purposes in which it is desirable to obtain an asphalt free aqueous phase. Examples are certain polymers in latices which are added to emulsified asphalts that are lighter than the aqueous portion of the emulsions or other material lighter than water that might be dispersed in emulsified asphalts. 1.3The second procedure is based upon separating dispersed materials, such as certain polymers in latices, in which the non-asphaltic dispersed materials are heavier than the initial aqueous portion and the asphalt particles in the emulsion. 1.4 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
Keywords
emulsified asphalt, asphalt emulsion, polymer latex, centrifuge, recovering latices from emulsions, dispersed solids, recovering aqueous phases from emulsions
The title and scope are in draft form and are under development within this ASTM Committee.
Citing ASTM Standards
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