Evaluation of dynamic shear rheometer tests for emulsions : [tech summary].
-
2014-12-01
-
Details:
-
Creators:
-
Corporate Creators:
-
Subject/TRT Terms:
-
Publication/ Report Number:
-
Resource Type:
-
Geographical Coverage:
-
Corporate Publisher:
-
Abstract:Currently, the Louisiana Department of Transportation and Development (DOTD) requires ductility tests at 25°C according to
AASHTO T51 for emulsions, force ductility ratio at 4°C, and elastic recovery at 10°C according to AASHTO T300 and AASHTO
T301, respectively, for polymer modifi ed emulsions. The fact that polymer-modifi ed asphalt is strain dependent creates questions
regarding purchase specifi cations based on constant strain controlled tests. In developing performance grade (PG) specifi cations for
emulsions, one of the tests proposed in several reports is the multiple stress creep recovery (MSCR) test according to ASTM D7405.
This test determines percent elastic recovery and non-recoverable creep compliance and measures the damage behavior in the
linear and nonlinear range. Compared with the current binder protocol, a repeated creep test protocol (or some other method that
varies the frequency and strain and measures the accumulated permanent strain of the binder) represents an improvement in the
theoretical and practical concepts that will better rate the binder properties related to performance.
-
Format:
-
Collection(s):
-
Main Document Checksum:
-
Download URL:
-
File Type: