The particle breakage of porous and angular calcareous sand (CS) at the high-stress level is essential on compression feature but less quantified. In this research, a series of compression experiments and laser particle size analyzer tests were conducted under different ending pressures considering relative compaction and fine-grained soil (FS) content to investigate compression behavior and particle breakage of CS. The results indicate that the rebound curves are almost horizontal with a rebound index are between 0.0021 and 0.0054, and the FS content (smaller than 10%) has a little impact on resilience behavior. The irreversible plastic deformation is the main part of compression deformation. Besides, there exist two pressure thresholds of 400 kPa and 100 kPa corresponding to void ratio change trend when FS contents are smaller than 10% and reach 10%, respectively. Moreover, with FS contents increase from 0 to 10%, the moving distance of grading curves to the right becomes shorter gradually which suggests that the quantities of particle crushability decrease. FS can relieve stress concentration among CS that leading to less particle crushability. The combination of these factors including FS content, relative compaction, and axial loading has a complex effect on the relative crushability ratio. Both FS content and relative compaction can restrain particle crushability while axial loading could promote particle crushing. In addition, the relative crushability ratio has a negative linear relation with FS content and relative compaction. But, the relation between particle crushability ratios with axial loading can be described as a logarithmic function well. However, when relative compaction increases to a certain degree of 0.7, the influence of pressure on the relative crushability ratio is weakened. Similarly, the effect of relative compaction on the void ratio is weakened when the FS content is increased. Furthermore, there is a good negative linear correlation between the void ratio and relative crushability ratio.

高应力水平下多孔和角质钙质砂（CS）的颗粒破碎对于压缩特征是必不可少的，但量化程度较低。在这项研究中，考虑了相对压实度和细粒土壤（FS）的含量，在不同的最终压力下进行了一系列压缩实验和激光粒度分析仪测试，以研究CS的压缩行为和颗粒破碎。结果表明，回弹曲线几乎是水平的，回弹指数在0.0021和0.0054之间，并且FS含量（小于10％）对回弹行为的影响很小。不可逆塑性变形是压缩变形的主要部分。除了，当FS含量小于10％且达到10％时，有两个压力阈值分别为400 kPa和100 kPa，分别对应于空隙率变化趋势。此外，随着FS含量从0％增加到10％，渐变曲线向右移动的距离逐渐变短，这表明颗粒的可压碎性降低。FS可以减轻CS中的应力集中，从而降低颗粒的可压碎性。包括FS含量，相对压实度和轴向载荷在内的这些因素的组合对相对压碎率具有复杂的影响。FS含量和相对压实度都可以抑制颗粒的破碎性，而轴向载荷可以促进颗粒的破碎。另外，相对压碎率与FS含量和相对压实度具有负线性关系。但，颗粒破碎率与轴向载荷之间的关系可以很好地描述为对数函数。但是，当相对压实度增加到一定程度的0.7时，压力对相对压碎率的影响减弱。类似地，当FS含量增加时，相对压实对空隙率的作用减弱。此外，空隙率和相对压碎率之间具有良好的负线性相关性。