石料资源特性对颚破粗集料针片状颗粒含量的影响

Abstract

The effect of stone resource characteristics on flatness and elongation ratio of coarse aggregate was studied. A statistical analysis was conducted for investigating the flatness and elongation ratio in seven kinds of processed aggregates using jaw crusher. Properties then such as apparent density, uniaxial compressive strength, crushing value and Vickers hardness value were measured, from which the relationships between the resource characteristics and flatness and elongation ratio are developed. The results indicate that with the increase of apparent density, uniaxial compressive strength, and Vickers hardness, the flatness and elongation ratio decreases. However, a positive relationship is found between the crushing value and the flatness and elongation ratio. A high correlation is observed between the crushing value, Vickers hardness value and the flatness and elongation ratio.