Abstract
Coarse-grained materials containing very large gravels are frequently used. Consequently, it is important to grasp the mechanical characteristics of the materials. However, test method for relative density- having the greatest influence on the strength characteristics, etc. -has not been established. As a result, it is inconvenient for us to make engineering decisions for various phenomena. In this paper, a test method for determining the minimum density of gravelly soils is proposed. The proposed method gave better results than the traditional method. In addition it was easier to carry out the experiments using the proposed method.