Unbound Materials Test

The mechanical properties of unbound materials are normally assessed using the triaxial test. A cored or laboratory prepared specimen is subjected to repeated haversine loading, the variations in axial stress and axial deformation are recorded and the resilient modulus is calculated. The test is normally performed using specified sequences of axial and confining stress combinations. Difficulties in preparing representative specimens can limit the use of the test to research establishments. Recently attempts have been made to find more simple, robust and user-friendly alternatives. The Springbox and K-Mould are notable examples. At present NTEC and Cooper Technology are conducting a two year investigation into unbound materials testing with the aim of developing a lower-cost system that can be used on a routine basis.

AASHTO T307; NCHRP 1-28A
OPTION 1				OPTION 2
CRT-UTM-NU Servo-Pneumatic Universal Testing Machine  CRT-TCC  CRT-T307 Accessories		CRT-GYR-EN Gyratory Compactor  CRT-GYR-EXT  CRT-GYRM-100 Accessories		CRT-UTM-HYD Servo-Pneumatic Universal Testing Machine  CRT-T307+ Accessories		CRT-GYR-EN Gyratory Compactor  CRT-GYR-EXT  CRT-GYRM-100  CRT-GYRM-150 Accessories

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