Tiêu chuẩn quốc tế

• Số hiệu / Standard Number: AASHTO T 170:2000
• Năm ban hành / Publication date: 2000
• Tình trạng / Status: W - Hết hiệu lực
• Tên tiếng Anh / Title in English: Standard Method of Test for Recovery of Asphalt Binder from Solution by Abson Method
• Thay thế cho / Replace: AASHTO T170:2000
• Số trang / Page: 6

Phạm vi áp dụng / Scope of standard

This method covers the recovery, by the Abson Method, of asphalt
binder from a previously conducted extraction with reagent-grade
trichloroethylene or reagent-grade methylene chloride (Note 1). The
asphalt binder is recovered with properties substantially the same
as those it possessed in the asphalt mixture and in quantity
sufficient for further testing.

Note 1-Trichloroethylene conforming to ASTM D
4080 or technical grade methylene chloride may be used, but it is
recommended that for each new supply of the solvent, a blank should
be run on an asphalt binder of known properties. In case of
dispute, reagent grade should be used.

Blank Determinations-Introduce about 70 g of asphalt
binder into a 2000-mL flask (68-oz); add about 800 mL (27 oz) of
solvent to dissolve the asphalt, allow the solution to stand for
about 4 h; concentrate the solution by distillation to about 200 mL
(6.8 oz) and then recover the asphalt binder. Total elapsed time
from when the solvent is added to the time the recovery test is
completed is about 7 h.

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.