Abstract
This paper describes such results of the experiments. 1) Compression index for the several states. C_<c0> : Compression index for pressure p=0.1〜1kgf/cm^2 C_<c1> : Compression index for pressure p=1〜10kgf/cm^2 C_<c2> : Compression index for pressure p>p_<cr> C_<c3> : Compression index for pre-road samples 2) Experimental and computed values of crush pressure p_<cr> of particles for the many samples 3) Transition of the grain size with pressure 4) Limiting pressure of compression 5) Creep deformation of the samples
