Static and Dynamic Creep Tests

A static axial stress is applied to a cylindrical specimen for a fixed period of time during which axial strain is continuously monitored. The axial stress is then removed and both the permanent and recovered strain determined. Investigations have shown that dynamic creep correlates better with in-service pavement rutting measurements than static creep. Static creep is not included in the latest European standard and does not feature in current American standards.

A dynamic axial stress is applied to a specimen for a specified number of load cycles while axial strain is monitored. It has been found that the results of this type of test correlate better than static creep with inservice pavement rutting. Correlation can be enhanced with the application of confining stress.

EN12697-25 A
OPTION 1				OPTION 2
CRT-UTM-NU Servo-Pneumatic Universal Testing Machine  CRT-PD-SET or CRT-INDENT Accessories		CRT-GYR-EN Gyratory Compactor  CRT-GYR-EXT  CRT-GYRM-100 Accessories		CRT-UTM-HYD Servo-Pneumatic Universal Testing Machine  CRT-PD-SET or CRT-INDENT Accessories		CRT-GYR-EN Gyratory Compactor  CRT-GYR-EXT  CRT-GYRM-100 Accessories

EN12697-25 B
OPTION 1				OPTION 2
CRT-UTM-NU Servo-Pneumatic Universal Testing Machine  CRT-TCC  CRT-PRESTRIAX-SET Accessories		CRT-GYR-EN Gyratory Compactor  CRT-GYR-EXT  CRT-GYRM-100 Accessories		CRT-UTM-HYD Servo-Pneumatic Universal Testing Machine  CRT-PRESTRIAX-SET Accessories		CRT-GYR-EN Gyratory Compactor  CRT-GYR-EXT  CRT-GYRM-100 Accessories

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