잔골재 표건상태 판정방법 개선에 관한 연구

Surface dry condition examination method on the KS F 2504(Testing method for specific gravity and absorption of fine aggregate) has dim detaii prescriptions which can cause different ways of understanding based on one's convinence, not on correct means ot rule. So we investigate the probiems about the inconsistency on decisioing surface dry condition at management examination in the iab and scene.In conciusion, free-falling method is easier and faster than self-weight method. And we aiso found that the most important face on decisioning surface dry is compacting factor ot tamping rod.