摘要
碎石颗粒形态对路面性能影响较大,因此路用碎石选材时,有必要研究其碎石颗粒大小及形态特征及其对混合料的影响相关性,方能对路面混合料的设计与施工进行优化。通过采用不同形态系数的碎石进行CBR试验,来研究碎石形态与混合料CBR的关联性。研究表明,集料CBR值随碎石的扁平率增大而减小,而随碎石圆度及形态指数增大而增大,且碎石颗粒的形态指数对集料的CBR值影响能力最大,在进行路用碎石选材时应对碎石的形态指数加以控制。
Gravel shape has significant influence on pavement performance. To improve the design and con- struetion process of asphalt mixture, the correlation between gravel shape and asphalt mixture should be studied. In this paper, through testing the California Bearing Ratio with different shapes of gravel, the correlation between grav- el shape and asphalt mixture is studied. As the fiat ratio of gravel increases, the California Bearing Ratio of asphalt mixture decreases; as the roundness and shape index of gravel increases, the California Bearing Ratio of asphalt mixture increases. Meanwhile, the shape index has the biggest influence on the California Bearing Ratio of asphalt mixture. So the shape index of gravel should be controlled in gravel selection.
出处
《青海交通科技》
2016年第3期6-8,31,共4页
Qinghai Transportation Science and Technology
关键词
碎石形态
混合料
路用性质
关联性分析
gravel shapes
mixture
pavement performance
correlation analysis
