The main study of this paper focus on the problems that the absolute breakage amount of particles in a certain size range can not be acquired and the hidden breakage amount can not be considered in the particle breakage rate in a sample. Three kinds of calcareous sands

rich in coarse

medium and fine sands respectively

are subjected to the confined compression test. Particles with different sizes are dyed in different colors

and pictures contain the breakage information of particle in all certain particle size range are taken. Then

the Image J software is employed to segment and binarize these pictures and records the area of particles with different colors

which is used to calculated the content of the particles with different colors after failure. Finally

an accumulated particle breakage Ba

which considers the absolute breakage amount of particles in a certain size range

is proposed. Test results show that with the increase of pressure or the concentration of particle distribution

overlapping breakage of samples increases. Among these calcareous sand samples consisting of particles in different sizes

the sand in intermediate particle sizes (0.25-1 mm) is breakable

and edge and corner breakages are the dominant break pattern in the particles with different sizes. The accumulated particle breakage Ba is larger than the relative breakage Br

and has a linear relationship with the logarithmic value of vertical pressure. The study of this paper provides a new method for the research on particle breakage.