The shape factor of quarry rock - Reassessment of the value and study into parameters of influence

The shape factor of quarry rock - defined by the ratio of the median nominal diameter and median sieve diameter - is often applied throughout various phases in the realization of a granular hydraulic structure. In this research, the value as well as the variability of the shape factor is reassessed. Also the dependency of the shape factor on elongation and blockiness - two parameters to describe the shape of rock - is examined. In order to do so a series of experiments has been performed on multiple rock samples. The research focuses on experimental rock data. Each file represents a specific rock grading. On each grading, sieve tests, density tests and shape tests have been performed in both IJmuiden, the Netherlands and Slovag, Norway.

采石场岩石的形状系数（shape factor）——定义为中位公称直径与中位筛径的比值——常应用于颗粒状水工结构建造的各个阶段。本研究重新评估了形状系数的取值及其变异性，并考察了形状系数对伸长率和块状度（描述岩石形状的两个参数）的依赖性。为实现此目标，研究人员对多组岩石样本开展了一系列试验。本研究聚焦于岩石试验数据，每个文件对应特定的岩石级配。针对每个级配，分别在荷兰艾默伊登（IJmuiden）和挪威斯洛瓦格（Slovag）进行了筛分试验、密度试验及形状试验。