Deformation Rate & Sprocket Arrangement
Pine slowed the specimen deformation rate of the Pine AF850 Test Press by installing the same size sprockets on the motor and the jack to achieve a 1:1 ratio between the motor and the jack because it was found not to comply with the specimen deformation rate of 50 ± 2 mm/minute specified by ASTM D8225-19. NCAT conducted testing on 9 mixes using one test press with the Current Sprocket Arrangement (a 16-tooth on the motor and a 15-tooth on the jack for a 1.0667 Ratio) and the same machine with a 1:1 Ratio Sprocket Arrangement. Complete information and data tables can be found here: Technical Bulletin 20210118