This method covers the recovery@ by the Abson Method@ of asphalt from a previously conducted extraction with reagent-grade trichlorethylene or reagent-grade methylene chloride (Note 1). The asphalt is recovered with properties substantially the same as those it possessed in the asphalt mixture and in quantity sufficient for further testing. The values stated in SI units are to be regarded as the standard. 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. Note 1??Trichloroethylene conforming to ASTM D 4080-96 or technical grade methylene may be used@ but it is recommended that for each new supply of the solvent a blank should be run on an asphalt of known properties. In case of dispute@ reagent grade should be used. Blank Determinations??Introduce about 70 g of asphalt into a 2000-mL flask; add about 800 mL of solvent to dissolve the asphalt@ allow the solution to stand for about four hours; concentrate the solution by distillation to about 200 mL and then recover the asphalt. (Total elapsed time@ from when the solvent is added to the time the recovery test is completed is about seven hours.)
T 170-2000 history
2023T/CIET 170-2023 General requirements for air dome shelter
2000T 170-2000 Standard Method of Test for Recovery of Asphalt from Solution by Abson Method