多孔沥青混合料旋转压实效果研究
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摘要
基于数字图像处理技术,分析多孔沥青混合料试件的断面数字化信息,研究混合料的旋转压实特性。以粗集料水平的分布特征、改进的颗粒面积比和空隙率的分布等特性描述混合料的均匀性,为研究多孔沥青混合料的均匀性提供参考。结果表明,在足够的旋转压实功下,粗集料截面几何中心对称且沿直径方向分布均匀。空隙率沿试件高度方向呈两端大、中部低分布。
Based on the technology of digital image processing,the section digitization information of porous asphalt mixture specimens was analyzed,and the rotary compaction characteristics of the mixtures were studied. Using the horizontal distribution characteristics of coarse aggregate,improved particle area ratio and distribution characteristics of air voids to describe the stability of asphalt mixture,which also offers reference to the research of porous asphalt mixture homogeneity. The results indicate that,with enough gyratory compacting power,coarse aggregate is symmetrical about the center of geometry as well as distributes uniformly along the direction of diameter. The air voids ratio distribution of SGC specimen had larger at the top and bottom and smaller at the middle.
Based on the technology of digital image processing,the section digitization information of porous asphalt mixture specimens was analyzed,and the rotary compaction characteristics of the mixtures were studied. Using the horizontal distribution characteristics of coarse aggregate,improved particle area ratio and distribution characteristics of air voids to describe the stability of asphalt mixture,which also offers reference to the research of porous asphalt mixture homogeneity. The results indicate that,with enough gyratory compacting power,coarse aggregate is symmetrical about the center of geometry as well as distributes uniformly along the direction of diameter. The air voids ratio distribution of SGC specimen had larger at the top and bottom and smaller at the middle.
引文
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[2]卢旭.广东地区OGFC矿料级配及配合比优化设计研究[D].广州:华南理工大学,2015.
[3]肖鑫,张肖宁.基于CAVF法的排水沥青混合料组成设计[J].公路交通科技,2016,33(10):7-12.
[4]李林萍,胡帮艳,张飞,等.多因素对沥青混合料空隙率影响的正交试验分析[J].重庆大学学报(自然科学版),2016,35(4):47-51.
[5] Zelelew H M,Almuntashri A,Agaian S,et al.An improved image processing technique for asphalt concrete X-ray CT images[J].Road Materials and Pavement Design,2013,14(2):341.
[6]肖鑫,张肖宁.基于工业CT的排水沥青混合料连通空隙特征研究[J].中国公路学报,2016,29(8):22-28.
[7]蒋玮,沙爱民,肖晶晶,等.多孔沥青混合料的细观空隙特征与影响规律[J].同济大学学报(自然科学版),2015,43(1):67-74.
[8]吴浩,张久鹏,王秉纲.多空沥青混合料空隙特征与路用性能关系[J].交通运输公路学报,2010(1):1-5.
[9]裴建中,王富玉,张嘉林.基于X-CT技术的多孔排水沥青混合料空隙竖向分布特性[J].吉林大学学报(工学版),2009,39(2):215-219.
[10]裴建中,张嘉林,常明丰.矿料级配对多空沥青混合料空隙分布特征的影响[J].中国公路学报,2010,23(1):1-6.