PHASE II REPORT - Caltrans

APPENDIX B PROPOSED TEST METHOD FOR THE
COHESION-ABRASION TEST (CAT)
DRAFT Proposed Method of Test for Measurement of Cohesion Build Up and
Wearing Qualities of Asphalt Emulsions and Aggregate Mixture Systems
[Cohesion Abrasion Test (CAT)]
AASHTO Designation xxx: DRAFT Proposed Test Method
1.0 SCOPE
1.1 The test method covers measurement of the wearing qualities of slurry seal and
micro-surfacing mixture systems under wet abrasion conditions at different levels of cure. The
method is also suitable for measuring early cohesion of slurry and microsurfacing mixes under
different cure conditions.
1.2 The test method is applicable to mixes after the formulation of the slurry seal or
micro-surfacing and, its set additives and water contents have been adjusted to prepare
homogenous flowing consistency.
1.3 The method may be used to assess the stripping potential of aggregates in early
life.
1.4 The test method is in development.
1.5 The values stated in SI units are to be regarded as the standard.
2.0 REFERENCED DOCUMENTS
2.1 ASTM D-3910-80a, Practice for Design, Testing, and Construction of Slurry Seal.
2.2 ASTM D-6372, Practice for Design, Testing and Construction of Micro-Surfacing.
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