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In this study, the characteristics of particle crash of decomposed granite soil sampled at Pocheon area were presented. The degree of weathering was artificially achieved by means of hydrofluoric acid. Weathering index was firstly determined by the analysis of mineral composition. Then, particle distribution, permeability tests were conducted. The results showed that weathering effects on particle crash over entire particle sizes. Comparative analysis on specific surface between D 10 and D 50 indicated that the smaller the particle size, the more the particle crash. In addition, the most particle crashing due to compaction appeared around the optimum moisture content. The incremental ratio of specific surface appeared to decrease as weathering proceeds, which means that the higher the weathering index the less the particle crash.                    .        , ,     .       ,  D

Particle Crushing Properties of Decomposed Granite Soil due to Changes in the Degree of Weathering