摘要
研究了碎石散粒体材料极限二次松散系数的测定方法并设计了测试装置。试验分析了不同粒径、颗粒形状、不同含水率、含泥量及级配对散粒体材料极限二次松散系数的影响。试验表明,随着碎石散粒体材料粒径的增大,极限二次松散系数呈现先增大后减小的趋势,且相同粒径的碎石相比卵石具有更好的松散能力。随着含水率的增大,碎石散粒体材料的极限二次松散系数先下降后增加。含泥量对碎石散粒体材料的影响很大,尤其是对于小粒径的碎石散粒体材料。级配碎石散粒体材料的松散性较单一粒径的松散性差。
Test methods of limit secondary loose coefficient and a testing device are designed. The influences of particle size, shape, moisture content, clay content and gradation on limit secondary loose coefficient are analyzed. Experiment shows that with the increasing of macadam granular material particle size , limit secondary loose coefficient increases at first and then decreases, and the same size of macadam has better loose ability than pebble. Along with the increase of moisture content, macadam granular mate- rial of limit secondary loose coefficient increase after decline. Mud have great influences on macadam granular material, especially for small particle size of macadam granular material. The loose properties of the gradation scattered grain of body materials is poorer than a single particle size.
出处
《公路》
北大核心
2012年第12期134-139,共6页
Highway
关键词
道路工程
碎石散粒体材料
极限二次松散系数
松散性
路基沉降
road engineering
macadam granular materials
limit secondary loose coefficient
bulking property
roadbed settlement
