It is widely accepted that both particle shape and mineralogy could have a great effect on the particle strength. However, due to the complexity of nature grains, it is difficult to distinguish the influence of particle shape from mineralogy. This paper shows measurements of the particle shape and mineralogy of carbonate sand, completely decomposed granite, Leighton Buzzard sand and pumice sand. The particle shape of carbonate sand and completely decomposed granite is similar, but the mineral of carbonate sand is carbon dioxide while the mineral of completely decomposed granite is mica and feldspar. It is found that the single particle strength of completely decomposed granite is higher than that of carbonate sand, and the particle breakage caused by one-dimensional compressing tests of completely decomposed granite is higher than that of carbonate sand. The mineralogy of both completely decomposed granite and Leighton Buzzard sand are quartz, but completely decomposed granite is more heterogeneous, result in the single particle strength of completely decomposed granite is much lower than that of Leighton Buzzard sand. It is also found the particle breakage from the one-dimensional compression test for completely decomposed is larger than Leighton Buzzard sand. It should be noted that carbonate sand is stronger than completely decomposed granite after quantitatively analysis the particle shape, particle breakage and compressibility behavior although carbonate sand has extremely irregular shape such as a branch shape, and also several pores. On the other hand, although Leighton Buzzard sand, completely decomposed granite and also pumice sand to some extent have composition of silica, the crystal of those three is completely different, result in the strength or compressibility are quite different. It seems that particle shape is not a major factor to affect strength or compressibility, but the mineralogy could be a major factor.

中文翻译：

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颗粒形状和矿物学对颗粒强度，断裂和可压缩性的影响

人们普遍认为，颗粒形状和矿物学都可能对颗粒强度产生很大影响。然而，由于天然颗粒的复杂性，很难将颗粒形状的影响与矿物学区分开。本文显示了碳酸盐砂，完全分解的花岗岩，Leighton Buzzard砂和浮石砂的颗粒形状和矿物学测量结果。碳酸盐砂和完全分解的花岗岩的颗粒形状相似，但是碳酸盐砂的矿物是二氧化碳，而完全分解的花岗岩的矿物是云母和长石。发现完全分解的花岗岩的单颗粒强度高于碳酸盐砂，完全分解的花岗岩一维压缩试验引起的颗粒破裂高于碳酸盐砂。完全分解的花岗岩和Leighton Buzzard砂的矿物学均为石英，但完全分解的花岗岩的异质性更高，导致完全分解的花岗岩的单颗粒强度比Leighton Buzzard砂的低。还发现一维压缩试验中完全分解的颗粒破裂大于莱顿·巴扎德沙粒。应当注意的是，尽管碳酸盐砂具有极其不规则的形状，例如分支形状，并且还具有多个孔，但是在对颗粒形状，颗粒破裂和可压缩性进行定量分析之后，碳酸盐砂比完全分解的花岗岩强。另一方面，尽管Leighton Buzzard砂，完全分解的花岗岩以及浮石砂在一定程度上具有硅石成分，但是这三种的晶体却完全不同，导致强度或可压缩性有很大不同。似乎颗粒形状不是影响强度或可压缩性的主要因素，但矿物学可能是主要因素。