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首页> 外文期刊>Journal of Materials Engineering and Performance >Enrichment of Fine Mica Originating From Rock Aggregate Production and Its Influence on the Mechanical Properties of Bituminous Mixtures
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Enrichment of Fine Mica Originating From Rock Aggregate Production and Its Influence on the Mechanical Properties of Bituminous Mixtures

机译：源自骨料生产的细云母的富集及其对沥青混合料力学性能的影响

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摘要

Analyses of mica-bearing, crushed granitoid rocks revealed a significant enrichment of free mica in the fine fraction. Qualitative tests of bituminous mixtures with an increasing content of free mica in the fine fraction suggested a considerable deterioration of the mechanical properties of the asphalt mass. The negative influence of fine mica on the mechanical properties of the asphalt mixtures was most likely caused by the ability of mica to adsorb bitumen and to create zones of weakness. This phenomenon seemed to be linked to a preferred orientation (foliation) of the mica particles that was connected to the compaction of asphalt masses during the construction of the surface course. The threshold content at which the fine mica negatively influenced the quality of the bituminous mixtures was estimated to be 30-35 vol.percent.
机译：对含云母的碎花岗岩岩石的分析表明，细粒中的游离云母明显富集。沥青混合物中细云母中游离云母含量增加的定性测试表明，沥青物料的机械性能大大降低。细云母对沥青混合物的机械性能的负面影响很可能是由云母吸附沥青和形成薄弱区的能力引起的。这种现象似乎与云母颗粒的优选取向（叶面化）有关，而云母颗粒的优选取向（叶面化）与表面层构造过程中沥青团块的压实有关。细云母对沥青混合物的质量产生负面影响的阈值含量估计为30-35％（体积）。

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