石料资源特性对颚破粗集料针片状颗粒含量的影响

Influence of Stone Resources Characteristics on Flatness and Elongation Ratio of Aggregate

为探索石料资源特性与加工后粗集料针片状颗粒含量的影响关系,统计分析了7种硬岩样本经颚式破碎机破碎后的粗集料针片状颗粒含量,并测试了石料表观密度、单轴抗压强度、压碎值和维氏硬度值等资源特性,进而分析了石料资源特性对粗集料针片状颗粒含量的影响.结果表明:粗集料针片状颗粒含量随石料表观密度、单轴抗压强度和维氏硬度值的增大而减小,随压碎值的增大而增大;石料压碎值、维氏硬度值与针片状颗粒含量具有良好的相关性.

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.