In view of the problems of current scouring tests on cement stabilized macadam base (CSMB) materials such as difficult to operate and low efficiency

a rotary scouring test equipment for CSMB materials was developed. By using FLUENT software

the scouring force on specimens was analyzed in numerical simulation

and the scouring force on the surface of the specimens was about 8 to 50 kPa under different scouring processes. Based on the influence of different immersion heights

scouring frequencies

and scouring time on the specimens

the optimal rotary scouring test parameters were proposed. The influence of unconfined compressive strength

voidage and compaction degree on the scouring damage of specimens was analyzed. Results show that the scour mass loss rate was approximately linearly decreasing with the increase in the unconfined compressive strength. In terms of anti-scouring

the compressive strength of CSMB should not be less than 4.0 MPa

and the cement content should not be less than 4.5%. The scour mass loss rate changed in the form of “U” with the increase in voidage

and the optimal anti-scouring voidage was between 2.5% and 5.0%. With compaction degree enhanced

the scour resistance of the specimens increased

and the lowest compaction degree should be greater than 98%. According to the influence of top surface void of base layer on the fatigue life of pavement structure in finite element simulation

based on the principle that the fatigue life of asphalt layer reduced by 40% to 60%

the scour resistance technical standard of CSMB was put forward.