변형강도 시험용 하중봉의 원형절삭반경 선정연구

초록

This study evaluated influence of the loading head dimension on characteristics of deformation strength (SD) of asphalt mixtures. Kim test and Wheel tracking (WT) test were conducted to evaluate SD characteristics with relation to WT results for various mixtures. The SD values and coefficient of variation of SD values of r=10㎜ were smaller than those of r=10.5㎜. It was also found that SD values obtained using r=10㎜ loading head showed high correlations with rut parameters of WT test. It was indicated that the aggregate size and radius (r) of round cut were statistically significant variables on SD at = 0.05 level in the analysis of variance. However, in interaction of r and aggregate size showed no significance within 10~19㎜ aggregate size at the same level. Therefore, it was concluded that the diameter (D) of 40㎜ and the bottom edge radius (r) of 10㎜ was suitable dimension of loading head for deformation strength test.

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